Battery protection circuit, battery protection board, battery, electronic device, and control method

Abstract

This disclosure relates to a battery protection circuit, a battery protection board, a battery, an electronic device, and a control method. The battery protection circuit includes: a battery cell; an integrated circuit including a first pin and a second pin, wherein when the battery protection circuit is in a first mode, the first pin is connected to a first terminal of the battery cell, and the second pin is connected to a second terminal of the battery cell; and a first switch, one end of which is connected to the first pin, and the other end of which is connected to the second pin. When the battery protection circuit is in the first mode and the first switch is on, the first pin and the second pin are connected through the first switch to ensure that the voltage of the second pin is within a first threshold range. The protection circuit then exits the first mode and enters a second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, while in the second mode, the power consumption of the battery protection circuit is greater than the threshold. This disclosure simplifies the operation of exiting the first mode by using the first switch to control the battery protection circuit to exit the first mode.

Description

Technical Field

[0001] This disclosure relates to the field of battery storage technology, and in particular to a battery protection circuit, a battery protection board, a battery, an electronic device, and a control method. Background Technology

[0002] Because electronic devices are in a powered-off storage state during the time they travel from the factory to the end user, the battery still supplies power to some circuit components, and the battery itself also experiences leakage current loss. This makes it possible for the battery to be over-discharged during this period, leading to battery damage.

[0003] Therefore, in order to extend the power-off storage time of electronic devices and enable them to meet long-term storage requirements, it is necessary to reduce the power consumption of electronic devices in the power-off state. However, exiting this low-power state requires connecting to a power source or removing and reinserting the battery, which is inconvenient. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a battery protection circuit, a battery protection board, a battery, an electronic device, and a control method.

[0005] According to a first aspect of the present disclosure, a battery protection circuit is provided, the battery protection circuit comprising: a battery cell; an integrated circuit including a first pin and a second pin, wherein when the battery protection circuit is in a first mode, the first pin is connected to a first terminal of the battery cell, and the second pin is connected to a second terminal of the battery cell; a first switch, one end of the first switch being connected to the first pin, and the other end of the first switch being connected to the second pin; wherein when the battery protection circuit is in the first mode and the first switch is on, the first pin and the second pin are connected through the first switch to make the voltage of the second pin within a first threshold range, and the battery protection circuit exits the first mode and enters a second mode; wherein in the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0006] In some embodiments, the integrated circuit further includes a second switch and a third switch, wherein the second switch is disposed between the first pin and the first electrode, and the third switch is disposed between the second pin and the second electrode, wherein when the battery protection circuit is in the first mode, the second switch connects the first pin and the first electrode, and the third switch connects the second pin and the second electrode; when the battery protection circuit is in the second mode, the second switch disconnects the connection between the first pin and the first electrode, and the third switch disconnects the connection between the second pin and the second electrode.

[0007] In some embodiments, the integrated circuit further includes: a first resistor disposed between the second switch and the first pin; and a second resistor disposed between the third switch and the second pin.

[0008] In some embodiments, the first electrode is the negative electrode of the battery cell, the second electrode is the positive electrode of the battery cell, and the battery protection circuit further includes a control element, the control element including an output pin; the integrated circuit further includes a third pin connected to the output pin, wherein when the battery protection circuit is in the second mode, the control element sends a first signal to the third pin through the output pin to cause the battery protection circuit to enter the first mode.

[0009] In some embodiments, the control element further includes a receiving pin connected to the first switch, and the battery protection circuit further includes: a first capacitor-resistor circuit, including a third resistor and a third capacitor, the third resistor being disposed between the output pin and the third pin, one end of the third capacitor being connected between the output pin and the third pin, and the other end of the third capacitor being connected to the second electrode; and a second capacitor-resistor circuit, including a fourth resistor and a fourth capacitor, the fourth resistor being disposed between the receiving pin and the second pin, one end of the fourth capacitor being connected between the receiving pin and the second pin, and the other end of the fourth capacitor being connected to the second electrode.

[0010] In some embodiments, the battery protection circuit further includes: an output terminal; a fourth switch disposed between the battery cell and the output terminal; when the battery protection circuit is in the second mode, the fourth switch connects the battery cell and the output terminal to discharge the battery cell; when the battery protection circuit is in the first mode, the fourth switch disconnects the battery cell and the output terminal to stop the battery cell from discharging.

[0011] According to a second aspect of the present disclosure, a battery protection board is provided, the battery protection board comprising: the battery protection circuit described in any one of the first aspects.

[0012] According to a third aspect of the present disclosure, a battery is provided, the battery comprising: the battery protection board described in the second aspect, or the battery protection circuit described in any one of the first aspects.

[0013] According to a fourth aspect of the present disclosure, an electronic device is provided, the electronic device comprising: the battery described in the third aspect and the first aspect, or the battery protection circuit described in any one of the first aspects.

[0014] According to a fifth aspect of the present disclosure, a battery protection circuit control method is provided, wherein the battery protection circuit is the battery protection circuit described in any of the first aspects, the method comprising: monitoring the voltage of a second pin; and controlling the battery protection circuit to exit a first mode and enter a second mode in response to the duration during which the voltage of the second pin is within a first threshold range being greater than or equal to a first time threshold, wherein the power consumption of the battery protection circuit in the first mode is less than a threshold, and the power consumption of the battery protection circuit in the second mode is greater than the threshold.

[0015] In some embodiments, controlling the battery protection circuit to exit the first mode and enter the second mode includes: controlling a second switch to disconnect the connection between the first pin and the first electrode, and controlling a third switch to disconnect the connection between the second pin and the second electrode; wherein the second switch is disposed between the first pin and the first electrode, and the third switch is disposed between the second pin and the second electrode.

[0016] In some embodiments, the battery protection circuit control method further includes: controlling the battery protection circuit to enter the first mode in response to a third pin connected to the output pin of the control element receiving a first signal for a duration greater than or equal to a second time threshold.

[0017] In some embodiments, controlling the battery protection circuit to enter the first mode includes: turning on the first pin and the first terminal through a second switch, and turning on the second pin and the second terminal through a third switch; wherein the second switch is disposed between the first pin and the first terminal, and the third switch is disposed between the second pin and the second terminal.

[0018] In some embodiments, the method further includes: in response to the battery protection circuit being in the second mode, controlling a fourth switch to turn on the battery cell and the output terminal to discharge the battery cell; in response to the battery protection circuit being in the first mode, controlling the fourth switch to disconnect the battery cell and the output terminal to stop the battery cell from discharging; wherein the fourth switch is disposed between the battery cell and the output terminal.

[0019] In some embodiments, after the battery protection circuit enters the second mode, the method further includes: monitoring the level value of a third signal received by a third pin; controlling the battery protection circuit to enter the third mode in response to the level value of the third signal received by the third pin being less than or equal to a level signal threshold, wherein in the third mode, a fourth switch disconnects the battery cell and the output terminal to stop the battery cell from discharging; and controlling the battery protection circuit to enter the fourth mode in response to the level signal received by the third pin being greater than the level signal threshold, wherein in the fourth mode, the fourth switch connects the battery cell and the output terminal to discharge the battery cell, wherein the level signal threshold is dynamically adjusted according to the battery cell's charge level.

[0020] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: By connecting the first pin and the second pin to the two ends of the first switch respectively, when the first switch is turned on, the first pin and the second pin can be connected through the first switch and the voltage of the second pin can be changed. The battery protection circuit can exit the first mode according to the voltage value of the second pin, so that the exit of the battery protection circuit from the first mode is associated with the on state of the first switch. In this way, the battery protection circuit can be controlled to exit the first mode by controlling the on and off state of the first switch, which simplifies the operation method of exiting the first mode.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0023] Figure 1 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment.

[0024] Figure 2 This is a schematic diagram of the current in a first mode of a battery protection circuit according to an exemplary embodiment.

[0025] Figure 3 This is a schematic diagram of the current in a first mode of a battery protection circuit according to an exemplary embodiment.

[0026] Figure 4 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment.

[0027] Figure 5 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment.

[0028] Figure 6 This is a schematic diagram of the current in a first mode of a battery protection circuit according to an exemplary embodiment.

[0029] Figure 7 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment.

[0030] Figure 8 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0031] Figure 9 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0032] Figure 10 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0033] Figure 11 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0034] Figure 12 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0035] Figure 13 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0036] Figure 14 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0037] Figure 15 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0038] Figure 16 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0039] Figure 17 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0040] Figure 18 This is a block diagram illustrating a battery protection circuit control device according to an exemplary embodiment.

[0041] Figure 19 This is a block diagram illustrating an apparatus for controlling a battery protection circuit according to an exemplary embodiment. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0043] In related technologies, a switch can be installed between the battery and most of the electrical components of the electronic device. By turning off the switch, the battery stops supplying power to most of the electrical components of the electronic device, thereby reducing the battery's power consumption.

[0044] Exiting this low-power state requires connecting to a power source or removing and reinserting the battery, which is rather inconvenient.

[0045] To address the aforementioned technical problems, embodiments of this disclosure provide a battery protection circuit, a battery protection board, a battery, an electronic device, and a control method. The battery protection circuit includes: a battery cell; an integrated circuit including a first pin and a second pin, wherein when the battery protection circuit is in a first mode, the first pin is connected to a first terminal of the battery cell, and the second pin is connected to a second terminal of the battery cell; a first switch, one end of which is connected to the first pin, and the other end of which is connected to the second pin; wherein, when the battery protection circuit is in the first mode and the first switch is on, the first pin and the second pin are connected through the first switch to make the voltage of the second pin within a first threshold range, and the battery protection circuit exits the first mode and enters a second mode; wherein, in the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0046] This disclosure connects the first pin and the second pin to the two ends of the first switch respectively. When the first switch is turned on, the first pin and the second pin can be connected through the first switch and the voltage of the second pin can be changed. The battery protection circuit can exit the first mode according to the voltage value of the second pin. This links the exit of the battery protection circuit from the first mode to the on / off state of the first switch. In this way, the battery protection circuit can be controlled to exit the first mode by controlling the on / off state of the first switch, which simplifies the operation method of exiting the first mode.

[0047] It is understood that the battery protection circuit disclosed herein can be applied to any of the following types of terminals.

[0048] It is understood that the terminal involved in this disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., and is a device that provides voice and / or data connectivity to a user. For example, a terminal may be a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals include: smartphones (Mobile Phones), pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptops, tablets, wearable devices, or in-vehicle devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be an in-vehicle device. It should be understood that the embodiments of this disclosure do not limit the specific technology or specific device form adopted by the terminal.

[0049] Figure 1 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment.

[0050] In some embodiments, such as Figure 1 As shown, the battery protection circuit may include cell B, integrated circuit 10, and first switch SW.

[0051] Integrated circuit 10 may include a first pin VM and a second pin PSR. When the battery protection circuit is in the first mode, the first pin VM can be connected to the first terminal B+ of cell B, and the second pin PSR can be connected to the second terminal B- of cell B.

[0052] One end of the first switch SW can be connected to the first pin VM, and the other end of the first switch SW can be connected to the second pin PSR.

[0053] When the battery protection circuit is in the first mode, the first switch SW is changed from the off state to the on state. The first pin VM can be connected to the second pin PSR through the first switch SW in the on state, so that the voltage of the second pin PSR is within the first threshold range. When the integrated circuit 10 detects that the voltage of the second pin PSR is within the first threshold range, the battery protection circuit can exit the first mode and enter the second mode.

[0054] In the first mode, the power consumption of the battery protection circuit is less than the threshold, while in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0055] For example, the first mode could be a mode that protects the battery during long-term storage or transportation. In the first mode, the battery's storage life can be extended and its health protected by reducing the battery's quiescent current. The second mode can be any of the preset modes other than the first mode.

[0056] By connecting the first pin VM and the second pin PSR to the two ends of the first switch SW respectively, when the first switch SW is turned on, the first pin VM and the second pin PSR can be connected through the first switch SW and the voltage of the second pin PSR can be changed. The battery protection circuit can exit the first mode according to the voltage value of the second pin PSR, so that the exit of the battery protection circuit from the first mode is associated with the on / off state of the first switch SW. In this way, the battery protection circuit can be controlled to exit the first mode by controlling the on / off state of the first switch SW, which simplifies the operation method of exiting the first mode.

[0057] The battery protection circuit may include two first connection terminals CS1 and two second connection terminals CS2. The two first connection terminals CS1 may be electrically connected to each other, and the two second connection terminals CS2 may be electrically connected to each other.

[0058] In some embodiments, the first electrode B+ and the second electrode B- can be opposite electrodes of the cell B, for example, as shown in... Figure 1 As shown, the first electrode B+ can be the positive electrode of cell B, and the second electrode B- can be the negative electrode of cell B. Another example is... Figure 5 As shown, the second electrode B- can be the positive electrode of cell B, and the first electrode B+ can be the positive electrode of cell B.

[0059] In some embodiments, such as Figure 1 As shown, integrated circuit 10 may include a first power supply pin VDD connected to a first terminal B+, and a second power supply pin VSS connected to a second terminal B-. In a second mode, cell B can supply power to integrated circuit 10 through the first power supply pin VDD and the second power supply pin VSS. For example, in the second mode, the first power supply pin VDD can be connected to the positive terminal of cell B, and the second power supply pin VSS can be connected to the negative terminal of cell B.

[0060] The integrated circuit 10 may also include a second switch S1 and a third switch S2. The second switch S1 may be located between the first pin VM and the first power supply pin VDD. When the second switch S1 is turned on, the first pin VM can be turned on and connected to the first power supply pin VDD within the integrated circuit 10 through the second switch S1.

[0061] The third switch S2 can be set between the second pin PSR and the second power supply pin VSS. When the third switch S2 is turned on, the second pin PSR can be turned on within the integrated circuit 10 through the third switch S2 and the second power supply pin VSS.

[0062] When the battery protection circuit is in the first mode, the second switch S1 conducts the first pin VM and the first power supply pin VDD, and the third switch S2 conducts the second pin PSR and the second power supply pin VSS. This allows one end of the first switch SW to be connected to the first terminal B+ through the first pin VM and the first power supply pin VDD, and the other end of the first switch SW to be connected to the second terminal B- through the second pin PSR and the second power supply pin VSS. This satisfies the loop connection requirement for the first switch SW to control the battery protection circuit to exit the first mode, allowing the user to control the battery protection circuit to exit the first mode by controlling the on / off state of the first switch SW, thus simplifying the operation method for exiting the first mode.

[0063] When the battery protection circuit is in the second mode, the second switch S1 can disconnect the first pin VM and the first power supply pin VDD, and the third switch S2 can disconnect the second pin PSR and the second power supply pin VSS, so that the first pin VM, the second pin PSR, the first power supply pin VDD, and the second power supply pin VSS can function normally as pins of integrated circuit 10. For example, when the battery protection circuit is in the second mode, the first pin VM can be in a floating state, the second pin PSR can be used as a voltage detection pin, and cell B can supply power to integrated circuit 10 through the first power supply pin VDD and the second power supply pin VSS.

[0064] Figure 5 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment. Figure 6 This is a schematic diagram of the current in a first mode of a battery protection circuit according to an exemplary embodiment.

[0065] In some embodiments, such as Figure 5 and Figure 6 As shown, integrated circuit 10 may include a first power supply pin VDD connected to the second terminal B-, and a second power supply pin VSS connected to the first terminal B+. In a second mode, cell B can supply power to integrated circuit 10 through the first power supply pin VDD and the second power supply pin VSS. For example, in the second mode, the first power supply pin VDD can be connected to the positive terminal of cell B, and the second power supply pin VSS can be connected to the negative terminal of cell B.

[0066] The integrated circuit 10 may also include a second switch S1 and a third switch S2. The second switch S1 may be located between the first pin VM and the second power supply pin VSS. When the second switch S1 is turned on, the first pin VM can be turned on within the integrated circuit 10 through the second switch S1 and the second power supply pin VSS.

[0067] The third switch S2 can be set between the second pin PSR and the first power supply pin VDD. When the third switch S2 is turned on, the second pin PSR can be turned on and connected to the first power supply pin VDD within the integrated circuit 10 through the third switch S2.

[0068] When the battery protection circuit is in the first mode, the second switch S1 conducts the first pin VM and the second power supply pin VSS, and the third switch S2 conducts the second pin PSR and the first power supply pin VDD. This allows one end of the first switch SW to be connected to the first terminal B+ through the first pin VM and the second power supply pin VSS, and the other end of the first switch SW to be connected to the second terminal B- through the second pin PSR and the first power supply pin VDD. This satisfies the loop connection requirement for the first switch SW to control the battery protection circuit to exit the first mode, allowing the user to control the battery protection circuit to exit the first mode by controlling the on / off state of the first switch SW, thus simplifying the operation method for exiting the first mode.

[0069] When the battery protection circuit is in the second mode, the second switch S1 can disconnect the first pin VM and the second power supply pin VSS, and the third switch S2 can disconnect the second pin PSR and the first power supply pin VDD, so that the first pin VM, the second pin PSR, the second power supply pin VSS, and the first power supply pin VDD can function normally as pins of integrated circuit 10. For example, when the battery protection circuit is in the second mode, the first pin VM can be in a floating state, the second pin PSR can be used as a voltage detection pin, and cell B can supply power to integrated circuit 10 through the first power supply pin VDD and the second power supply pin VSS.

[0070] In some embodiments, such as Figure 1 As shown, integrated circuit 10 may include: a first resistor Rpu and a second resistor Rpd.

[0071] The first resistor Rpu can be set between the second switch S1 and the first pin VM, so that the first resistor Rpu can be used as a pull-up resistor for the first pin VM, which can improve the stability of the voltage of the first pin VM and stably pull up the voltage of the first pin VM to the voltage of the first power supply pin VDD.

[0072] The second resistor Rpd can be set between the third switch S2 and the second pin PSR, so that the second resistor Rpd can be used as a pull-down resistor for the second pin PSR, which can improve the stability of the voltage of the second pin PSR and stably pull down the voltage of the second pin PSR to the voltage of the second power supply pin VSS.

[0073] In some embodiments, the resistance values ​​of the first resistor Rpu and the second resistor Rpd can be from 10,000 ohms to 500,000 ohms. This allows the first resistor Rpu and the second resistor Rpd to limit the leakage current of cell B in the first mode, thereby reducing the battery's quiescent current, extending the battery's storage life, and protecting battery health.

[0074] In other embodiments, the first resistor Rpu and the second resistor Rpd can also be connected in series at any position between the first electrode B+ and the second electrode B- in the first mode to limit the leakage current of cell B in the first mode.

[0075] In some embodiments, such as Figure 1 As shown, the protection circuit may include a clamping diode 30, which can be used to share the voltage. One end of the clamping diode 30 is connected to the first pin VM, and the other end of the clamping diode 30 is connected to the second pin PSR.

[0076] When the battery protection circuit is in the first mode and the first switch SW is in the open state, the second pin PSR can be connected to the first pin VM through the clamping diode 30. The clamping diode 30 can share the voltage of the second pin PSR, thereby reducing the voltage of the second pin PSR and making the voltage of the second pin PSR less than the first threshold range. This allows the battery protection circuit in the first mode to remain in the first mode, continuously reducing the static current of the battery, thereby extending the battery's storage life and protecting the battery's health.

[0077] In some embodiments, such as Figure 1 As shown, the protection circuit may include a control element 20, which may include an output pin GPIO1. The output pin GPIO1 can be used to output a level signal. An exemplary output pin GPIO1 can be a general-purpose input / output pin.

[0078] Integrated circuit 10 may also include a third pin PS connected to the output pin GPIO1. When the protection circuit is in the second mode, the control element 20 can send a first signal to the third pin PS through the output pin GPIO1. When integrated circuit 10 receives the first signal, the battery protection circuit can enter the first mode.

[0079] In some embodiments, the first signal can be one of a high-level signal, a low-level signal, or a pulse signal. For example, the first signal can be a pulse signal. By setting the first signal to a signal with different characteristics, the integrated circuit 10 can specifically identify the first signal, improving the accuracy of the integrated circuit 10's identification of the first signal.

[0080] In some embodiments, such as Figure 1As shown, the control element 20 may also include a first receiving pin GPIO2 and a ground pin. For example, the first receiving pin GPIO2 may be a power control pin PWR, which can be used to control battery power supply and battery information parameters.

[0081] The first receive pin GPIO2 is connected to one end of the first switch SW, one end of the clamping diode 30, and the second pin PSR. The ground pin is connected to the other end of the first switch SW and the other end of the clamping diode 30. Through the above connection, when the battery protection circuit is in the first mode, the clamping diode 30 can be connected in parallel with the control element 20.

[0082] The clamping diode 30 can be configured to make the voltage of the control element 20 less than a first threshold, thereby preventing the control element 20 connected in parallel with the clamping diode 30 from being subjected to excessive voltage.

[0083] In some embodiments, the first receive pin GPIO2 can be a general purpose input / output pin or a power control pin.

[0084] When the first receiving pin GPIO2 is a general-purpose input / output pin, the control element 20 can receive level signals from the first pin and the second pin through the first receiving pin GPIO2, so that the control element 20 can perform different control actions according to different level signals.

[0085] When the first receiving pin GPIO2 is a power control pin, changing the on / off state of the first switch SW can change the level signal received by the first receiving pin GPIO2. Thus, by controlling the first switch SW, the control element 20 can perform different control actions. For example, after pressing the first switch SW, the control element 20 can make the battery cell supply power to the external load.

[0086] In some embodiments, such as Figure 1 As shown, the first electrode B+ is the positive electrode of cell B, and the second electrode B- is the negative electrode of cell B. When the battery protection circuit is in the first mode, due to the change in the pin connection relationship of integrated circuit 10, the ground pin of control element 20 is connected to the first electrode B+. In order to prevent the ground pin of control element 20 from being damaged by excessive voltage, the carrying voltage of clamping diode 30 is controlled, thereby preventing control element 20 connected in parallel with clamping diode 30 from bearing excessive voltage.

[0087] In some embodiments, clamping diode 30 may include one or more of a clamping diode and a resistor. For example, clamping diode 30 may be a bidirectional transient voltage suppressor or a bidirectional Zener diode.

[0088] In some embodiments, the protection circuit exits the first mode when the voltage of the second pin PSR remains within a first threshold range for a duration greater than or equal to the first threshold time. By adding duration detection to the voltage detection of the second pin PSR, the battery protection circuit can be prevented from erroneously exiting the first mode due to accidental touch or electrical signal fluctuations.

[0089] In some embodiments, the protection circuit enters a first mode when the duration for which the third pin PS receives the first signal is greater than or equal to a second threshold time. By adding duration detection to the signal reception detection of the third pin PS, it is possible to prevent the battery protection circuit from mistakenly entering the first mode due to accidental touch or electrical signal fluctuations.

[0090] Furthermore, due to the increased duration of detection, this also provides a buffer time for the external load of the battery protection circuit before cell B stops supplying power, so that the external load can store the operating data in a timely manner.

[0091] In some embodiments, the battery protection circuit may include a first capacitor-resistor circuit and a second capacitor-resistor circuit. The first capacitor-resistor circuit may be disposed between the output pin GPIO1 and the third pin PS. The first capacitor-resistor circuit can be used to stabilize the signal sent from the output pin GPIO1 to the third pin PS, thereby preventing fluctuations in the level signal of the output pin GPIO1, which would prevent it from being accurately sent to the third pin PS.

[0092] The second capacitor-resistor circuit can be set between the first receive pin GPIO2 and the second pin PSR. The second capacitor-resistor circuit can be used to stabilize the voltage of the second pin PSR, thereby avoiding fluctuations in the voltage of the second pin PSR, so that the integrated circuit 10 cannot accurately determine whether the voltage of the second pin PSR is within the first threshold range.

[0093] In some embodiments, such as Figure 1 As shown, the first capacitor-resistor circuit may include a third resistor R1 and a third capacitor C2. The third resistor R1 may be set between the output pin GPIO1 and the third pin PS. One end of the third capacitor C2 is connected between the output pin GPIO1 and the third pin PS, and the other end of the third capacitor C2 is connected to the second terminal B-.

[0094] The first capacitor-resistor circuit may include a fourth resistor R2 and a fourth capacitor C1. The fourth resistor R2 may be set between the first receive pin GPIO2 and the second pin PSR. One end of the fourth capacitor C1 is connected between the first receive pin GPIO2 and the second pin PSR, and the other end of the fourth capacitor C1 is connected to the second terminal B-.

[0095] In some embodiments, the first pin VM can be a voltage detection pin of integrated circuit 10. In a first mode, the first pin VM can be connected to the second pin PSR to form a current loop. In a second mode, the first pin VM can be used to detect the current of cell B, thereby obtaining the operating status of cell B. By multiplexing one pin for two functions, the pin resources required for function implementation can be reduced, saving device costs.

[0096] In some embodiments, such as Figure 1 As shown, the battery protection circuit may include: an output terminal and a fourth switch Q1.

[0097] The output terminal can be the connection terminal for cell B to output electrical energy. For example, the output terminal can include a first output terminal P+ and a second output terminal P-.

[0098] The fourth switch Q1 can be positioned between cell B and the output terminal. When the battery protection circuit is in the second mode, the fourth switch Q1 can connect cell B and the output terminal to allow cell B to discharge. When the battery protection circuit is in the first mode, the fourth switch Q1 can disconnect cell B and the output terminal to stop cell B from discharging.

[0099] By turning off the fourth switch Q1, the charging and discharging circuit can be shut off at the position of the electrode adjacent to cell B. Thus, the battery protection circuit in the first mode can stop cell B from supplying power to the external load directly connected to cell B, reducing the power loss caused by the external load that cannot be directly turned off in the first mode, and further improving the battery storage time in the first mode.

[0100] In some embodiments, integrated circuit 10 may include a first control pin DO, which can be used to control a fourth switch Q1.

[0101] In some embodiments, such as Figure 1 As shown, the fourth switch Q1 may include two sub-switches, which are used to disconnect the discharge circuit and disconnect the charging circuit respectively, so that the integrated circuit 10 has charge and discharge management functions.

[0102] In some embodiments, such as Figure 1 As shown, integrated circuit 10 also includes: current detection pin CS, fifth resistor R5, sixth resistor R4 and fifth capacitor C3.

[0103] The current sensing pin CS can be connected to the second terminal B- to measure the current in cell B.

[0104] The fifth resistor R5 can be connected in series with the first pin VM to share the voltage of the first pin VM.

[0105] The sixth resistor R4 can be placed between the first power supply pin VDD and the first terminal B+. One end of the fifth capacitor C3 is connected to the sixth resistor R4 and the first power supply pin VDD, and the other end of the fifth capacitor C3 is connected to the second terminal B- and the second power supply pin VSS. The fifth capacitor C3 and the sixth resistor R4 can form a capacitor-resistor circuit to stabilize the voltage supplied by cell B to integrated circuit 10.

[0106] The battery protection circuit also includes a seventh resistor R3 and a precision resistor RS. The seventh resistor R3 can be connected in series with the first switch SW to limit the current when the first switch SW is in the ON state. The precision resistor RS can be connected in series between the first terminal B+ and the second terminal B- for current detection.

[0107] In some embodiments, such as Figure 1 As shown, there can be multiple integrated circuits 10, so that when one integrated circuit 10 is damaged and cannot work properly, the other integrated circuits 10 can ensure the normal operation of the battery protection circuit.

[0108] Figure 2 This is a schematic diagram of the current in a first mode of a battery protection circuit according to an exemplary embodiment. Figure 3 This is a schematic diagram of the current in a first mode of a battery protection circuit according to an exemplary embodiment.

[0109] In some embodiments, such as Figure 2 As shown, when the battery protection circuit is in the first mode and the first switch SW is in the on state, the current can start from the first terminal B+ of cell B, pass through the first power supply pin VDD, the first pin VM, the first switch SW, the second pin PSR, and the second power supply pin VSS, and return to the second terminal B- of cell B.

[0110] When the battery protection circuit is in the first mode and the first switch SW is open, the voltage value of the second pin PSR can be expressed as:

[0111] Vpsr1=(V DD -V 30 )*R2 / (R1+R5+R4+R6+R2)

[0112] Vpsr1 is the voltage value of the second pin PSR when the battery protection circuit is in the first mode and the first switch SW is open;

[0113] V DD This refers to the voltage value of cell B.

[0114] V 30 This is the clamping voltage value of clamping diode 30;

[0115] R2 is the resistance value of the second resistor Rpd;

[0116] R1 is the resistance value of the first resistor Rpu;

[0117] R5 is the resistance value of the fifth resistor R5;

[0118] R4 is the resistance value of the fourth resistor R2.

[0119] like Figure 3 As shown, when the battery protection circuit is in the first mode and the first switch SW is in the open state, the current can start from the first terminal B+ of cell B, pass through the first power supply pin VDD, the first pin VM, the clamping diode 30, the second pin PSR, and the second power supply pin VSS, and return to the second terminal B- of cell B.

[0120] When the battery protection circuit is in the first mode and the first switch SW is in the on state, the voltage value of the second pin PSR can be expressed as:

[0121] Vpsr2 = V DD *R2 / (R1+R5+R7+R4+R6+R2)

[0122] Vpsr2 is the voltage value of the second pin PSR when the battery protection circuit is in the first mode and the first switch SW is in the on state;

[0123] R7 is the resistance value of the seventh resistor R3.

[0124] Since the resistance values ​​of the fourth resistor R2, the fifth resistor R5, the sixth resistor R4, and the seventh resistor R3 are much smaller than the resistance values ​​of the first resistor Rpu and the second resistor Rpd, the voltage at the second pin PSR can be expressed as follows when the battery protection circuit is in the first mode and the first switch SW is in the open state:

[0125] Vpsr1=(V DD -V 30 )*R2 / (R1+R2)

[0126] When the battery protection circuit is in the first mode and the first switch SW is in the on state, the voltage of the second pin PSR can be expressed as:

[0127] Vpsr2 = V DD *R2 / (R1+R2)

[0128] Therefore, when the battery protection circuit is in the first mode and the first switch SW changes from the off state to the on state, the voltage of the second pin PSR can be increased from Vpsr1 to Vpsr2 and is within the first threshold range.

[0129] In some embodiments, the first threshold range can be 0.5V. DD Up to 0.1V.

[0130] In other embodiments, such as Figure 6 As shown, when the battery protection circuit is in the first mode and the first switch SW is in the on state, the current can start from the second terminal B- of cell B, pass through the first power supply pin VDD, the second pin PSR, the first switch SW, the first pin VM, and the second power supply pin VSS, and return to the first terminal B+ of cell B.

[0131] When the battery protection circuit is in the first mode and the first switch SW is in the open state, the voltage value of the second pin PSR can be expressed as:

[0132] Vpsr1 = V DD

[0133] Vpsr1 is the voltage value of the second pin PSR when the battery protection circuit is in the first mode and the first switch SW is open;

[0134] V DD This is the voltage value of cell B.

[0135] When the battery protection circuit is in the first mode and the first switch SW is in the on state, the voltage value of the second pin PSR can be expressed as:

[0136] Vpsr2 = V DD *(R5+R7+R4+R1) / (R6+R1+R5+R7+R4+R2)

[0137] Vpsr2 is the voltage value of the second pin PSR when the battery protection circuit is in the first mode and the first switch SW is in the on state;

[0138] V DD This refers to the voltage value of cell B.

[0139] R1 is the resistance value of the first resistor Rpu;

[0140] R2 is the resistance value of the second resistor Rpd;

[0141] R5 is the resistance value of the fifth resistor R5;

[0142] R4 is the resistance value of the fourth resistor R2;

[0143] R6 is the resistance value of the sixth resistor R4;

[0144] R7 is the resistance value of the seventh resistor R3.

[0145] Since the resistance values ​​of the fourth resistor R2, the fifth resistor R5, the sixth resistor R4, and the seventh resistor R3 are much smaller than the resistance values ​​of the first resistor Rpu and the second resistor Rpd, the voltage at the second pin PSR can be expressed as follows when the battery protection circuit is in the first mode and the first switch SW is on:

[0146] Vpsr2 = V DD *R2 / (R1+R2)

[0147] That is, after the first switch SW is turned on, the voltage of the second pin PSR will change from high to low. The voltage of the second pin PSR will drop from Vpsr1 to Vpsr2 and be within the first threshold range.

[0148] Based on the same concept, this disclosure also provides a battery protection board.

[0149] A battery protection board can be any type of circuit board used to monitor and manage the charging and discharging process of a battery, preventing situations that may damage the battery, such as overcharging, over-discharging, overcurrent, or short circuits.

[0150] In some embodiments, the battery protection board may include a battery protection circuit. By connecting the first pin VM and the second pin PSR to the two ends of the first switch SW respectively, when the first switch SW is turned on, the first pin VM and the second pin PSR can be connected through the first switch SW and the voltage of the second pin PSR can be changed. The battery protection board can exit the first mode according to the voltage value of the second pin PSR, so that the exit of the battery protection board from the first mode is associated with the on / off state of the first switch SW. In this way, the battery protection board can be controlled to exit the first mode by controlling the on / off state of the first switch SW, which simplifies the operation method of exiting the first mode.

[0151] Based on the same concept, this disclosure also provides a battery.

[0152] A battery can be any device that can convert other forms of energy into electrical energy.

[0153] In some embodiments, the battery may include a battery protection board.

[0154] In some embodiments, the battery may include a battery protection circuit. By connecting the first pin VM and the second pin PSR to the two ends of the first switch SW respectively, when the first switch SW is turned on, the first pin VM and the second pin PSR can be connected through the first switch SW and the voltage of the second pin PSR can be changed. The battery can exit the first mode according to the voltage value of the second pin PSR, so that the battery exiting the first mode is associated with the on / off state of the first switch SW. In this way, the battery can be controlled to exit the first mode by controlling the on / off state of the first switch SW, which simplifies the operation method of exiting the first mode.

[0155] Based on the same concept, embodiments of this disclosure also provide an electronic device.

[0156] The electronic device can be a laptop computer, desktop computer, mobile phone, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, translator, and wearable devices such as watches and bracelets, and can be any electronic device with battery protection circuitry. In the following description, a mobile phone is used as an example, but this disclosure is not limited to this.

[0157] In some embodiments, the battery may include a battery or a battery protection circuit. By connecting the first pin VM and the second pin PSR to the two ends of the first switch SW respectively, when the first switch SW is turned on, the first pin VM and the second pin PSR can be connected through the first switch SW and the voltage of the second pin PSR can be changed. The electronic device can exit the first mode according to the voltage value of the second pin PSR, so that the exit of the electronic device from the first mode is associated with the on / off state of the first switch SW. In this way, the electronic device can be controlled to exit the first mode by controlling the on / off state of the first switch SW, which simplifies the operation method of exiting the first mode.

[0158] In some embodiments, the first switch SW can be a power button for turning the electronic device on or off. By associating the battery protection circuit exiting the first mode with the on state of the first switch SW as a power button, the user can control the electronic device to exit the first mode by pressing the power button, thus simplifying the operation method for exiting the first mode.

[0159] Figure 4 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment. Figure 7 This is a circuit structure diagram of a battery protection circuit according to an exemplary embodiment.

[0160] In some embodiments, such as Figure 4 and Figure 7 As shown, the electronic device may include a battery protection circuit 100 and a mainboard circuit 200. The battery protection circuit 100 and the mainboard circuit 200 can be connected via an output terminal. The control element, the first switch, and the clamping diode can be disposed on the mainboard circuit 200. By disposing of the control element, the first switch, and the clamping diode on the mainboard, the size of the battery protection circuit can be reduced, which helps to provide a larger energy storage space for the battery.

[0161] Based on the same concept, this disclosure also provides a control method for a battery protection circuit.

[0162] Figure 8This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0163] In some embodiments, such as Figure 8 As shown, the battery protection circuit control method may include the following steps:

[0164] S10: Monitor the voltage of the second pin;

[0165] S20: In response to the voltage of the second pin being within the first threshold range for a duration greater than or equal to the first time threshold, the battery protection circuit is controlled to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0166] The integrated circuit can monitor the voltage of the second pin. When the battery protection circuit is in the first mode and the first switch changes from the off state to the on state, the voltage of the second pin can rise to the first threshold range. After the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, the battery protection circuit can exit the first mode and enter the second mode.

[0167] In the first mode, the power consumption of the battery protection circuit is less than the threshold, while in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0168] For example, the first mode could be a mode that protects the battery during long-term storage or transportation. In the first mode, the battery's storage life can be extended and its health protected by reducing the battery's quiescent current. The second mode can be any of the preset modes other than the first mode.

[0169] By detecting the voltage of the second pin to exit the first mode, the exit of the battery protection circuit from the first mode can be linked to the conduction state of the first switch. In this way, the exit of the battery protection circuit from the first mode can be controlled by controlling the on / off state of the first switch, which simplifies the operation method of exiting the first mode.

[0170] Furthermore, after the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, it monitors the duration for which the voltage of the second pin remains within the first threshold range. When the duration is greater than or equal to the first threshold time, the battery protection circuit can exit the first mode and enter the second mode.

[0171] By adding duration detection to the voltage detection on the second pin, the battery protection circuit can be prevented from accidentally exiting the first mode due to accidental touch or electrical signal fluctuations, and the operation method for exiting the first mode is simplified.

[0172] Figure 9This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0173] In some embodiments, such as Figure 9 As shown, the battery protection circuit control method may include the following steps:

[0174] S10: Monitor the voltage of the second pin;

[0175] S21: In response to the duration of the voltage of the second pin being within a first threshold range being greater than or equal to a first time threshold, control the second switch to disconnect the connection between the first pin and the first pole, and control the third switch to disconnect the connection between the second pin and the second pole; wherein the second switch is located between the first pin and the first pole, and the third switch is located between the second pin and the second pole.

[0176] The integrated circuit can monitor the voltage of the second pin. When the battery protection circuit is in the first mode and the first switch changes from the off state to the on state, the voltage of the second pin can rise to the first threshold range. After the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, the battery protection circuit can exit the first mode and enter the second mode.

[0177] In the first mode, the power consumption of the battery protection circuit is less than the threshold, while in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0178] By controlling the second switch to disconnect the connection between the first pin and the first electrode, and controlling the third switch to disconnect the connection between the second pin and the second electrode, the connection between the first pin and the first electrode and between the second pin and the second electrode is no longer established, so that the integrated circuit can exit the first mode and operate normally.

[0179] Figure 10 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0180] In some embodiments, such as Figure 10 As shown, the battery protection circuit control method may include the following steps:

[0181] S10: Monitor the voltage of the second pin;

[0182] S201: In response to the voltage at the second pin being within the first threshold range;

[0183] S202: Determine that the duration for which the voltage of the second pin is within the first threshold range is greater than or equal to the first time threshold;

[0184] S203: Control the battery protection circuit to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0185] The integrated circuit can monitor the voltage of the second pin. When the battery protection circuit is in the first mode and the first switch changes from the off state to the on state, the voltage of the second pin can rise to the first threshold range. After the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, it monitors the duration of the voltage of the second pin within the first threshold range. When the duration is greater than or equal to the first threshold time, the battery protection circuit can exit the first mode and enter the second mode.

[0186] By adding duration detection to the voltage detection on the second pin, the battery protection circuit can be prevented from accidentally exiting the first mode due to accidental touch or electrical signal fluctuations, and the operation method for exiting the first mode is simplified.

[0187] Figure 11 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0188] In some embodiments, such as Figure 11 As shown, the battery protection circuit control method may include the following steps:

[0189] S10: Monitor the voltage of the second pin;

[0190] S20: In response to the voltage of the second pin being within the first threshold range for a duration greater than or equal to the first time threshold, control the battery protection circuit to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0191] S30: In response to the duration of the first signal received by the third pin connected to the output pin of the control element being greater than or equal to the second time threshold, the battery protection circuit is controlled to enter the first mode.

[0192] The integrated circuit can monitor the voltage of the second pin. When the battery protection circuit is in the first mode and the first switch changes from the off state to the on state, the voltage of the second pin can rise to the first threshold range. After the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, the battery protection circuit can exit the first mode and enter the second mode.

[0193] By detecting the voltage of the second pin to exit the first mode, the exit of the battery protection circuit from the first mode can be linked to the conduction state of the first switch. In this way, the exit of the battery protection circuit from the first mode can be controlled by controlling the on / off state of the first switch, which simplifies the operation method of exiting the first mode.

[0194] When the battery protection circuit is in the second mode, the integrated circuit can receive the first signal through the third pin, enabling the battery protection circuit to enter the first mode. This allows the integrated circuit to participate in maintaining the first mode and simplifies the operation method for entering the first mode.

[0195] By adding duration detection to the signal reception detection on the third pin, it is possible to prevent the battery protection circuit from mistakenly entering the first mode due to accidental touch or electrical signal fluctuations.

[0196] Furthermore, the addition of duration detection provides a buffer time for external loads to the battery protection circuit before the battery cell stops supplying power, allowing the external loads to store operational data in a timely manner.

[0197] Figure 12 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0198] In some embodiments, such as Figure 12 As shown, the battery protection circuit control method may include the following steps:

[0199] S10: Monitor the voltage of the second pin;

[0200] S201: The duration during which the voltage at the second pin is within the first threshold range is greater than or equal to the first time threshold.

[0201] S211: Determine that the duration for which the third pin receives the first signal is greater than or equal to the second time threshold;

[0202] S212: The battery protection circuit exits the first mode and enters the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0203] The integrated circuit can monitor the voltage of the second pin. When the battery protection circuit is in the first mode and the first switch changes from the off state to the on state, the voltage of the second pin can rise to the first threshold range. After the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, the battery protection circuit can exit the first mode and enter the second mode.

[0204] By detecting the voltage of the second pin to exit the first mode, the exit of the battery protection circuit from the first mode can be linked to the conduction state of the first switch. In this way, the exit of the battery protection circuit from the first mode can be controlled by controlling the on / off state of the first switch, which simplifies the operation method of exiting the first mode.

[0205] When the battery protection circuit is in the second mode, the integrated circuit can receive the first signal through the third pin. After the third pin receives the first signal, the duration of the third signal receiving the first signal is monitored. When the duration is greater than or equal to the second threshold time, the battery protection circuit enters the first mode, thereby enabling the integrated circuit to participate in the maintenance of the first mode and simplifying the operation method of entering the first mode.

[0206] By adding duration detection to the signal reception detection on the third pin, it is possible to prevent the battery protection circuit from mistakenly entering the first mode due to accidental touch or electrical signal fluctuations.

[0207] Furthermore, the addition of duration detection provides a buffer time for external loads to the battery protection circuit before the battery cell stops supplying power, allowing the external loads to store operational data in a timely manner.

[0208] Figure 13 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0209] In some embodiments, such as Figure 13 As shown, the battery protection circuit control method may include the following steps:

[0210] S10: Monitor the voltage of the second pin;

[0211] S20: In response to the voltage of the second pin being within the first threshold range for a duration greater than or equal to the first time threshold, control the battery protection circuit to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0212] S31: In response to receiving a first signal at a third pin connected to the output pin of the control element, the first pin and the first pole are connected via a second switch, and the second pin and the second pole are connected via a third switch; wherein the second switch is located between the first pin and the first pole, and the third switch is located between the second pin and the second pole.

[0213] The integrated circuit can monitor the voltage of the second pin. When the battery protection circuit is in the first mode and the first switch changes from the off state to the on state, the voltage of the second pin can rise to the first threshold range. After the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, the battery protection circuit can exit the first mode and enter the second mode.

[0214] In the first mode, the power consumption of the battery protection circuit is less than the threshold, while in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0215] By controlling the second switch to connect the first pin and the first pole, and controlling the third switch to connect the second pin and the second pole, a connection is formed between the first pin and the first pole, and between the second pin and the second pole. This allows a circuit to be formed with the two poles of the battery cell when the first switch is turned on, and changes the voltage of the second pin. This simplifies the operation of exiting the first mode by using the first switch.

[0216] Figure 14 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0217] In some embodiments, such as Figure 14 As shown, the battery protection circuit control method may include the following steps:

[0218] S10: Monitor the voltage of the second pin;

[0219] S20: In response to the voltage of the second pin being within the first threshold range for a duration greater than or equal to the first time threshold, control the battery protection circuit to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0220] S41: In response to the battery protection circuit being in the second mode, control the fourth switch to turn on the cell and the output terminal so that the cell can discharge.

[0221] S42: In response to the battery protection circuit being in the first mode, control the fourth switch to disconnect the cell and the output terminal so that the cell stops discharging; wherein, the fourth switch is located between the cell and the output terminal.

[0222] The integrated circuit can monitor the voltage of the second pin. When the battery protection circuit is in the first mode and the first switch changes from the off state to the on state, the voltage of the second pin can rise to the first threshold range. After the integrated circuit detects that the voltage of the second pin has risen to the first threshold range, the integrated circuit can control the fourth switch to disconnect the cell and the output terminal so that the cell stops discharging, thereby allowing the battery protection circuit to exit the first mode and enter the second mode.

[0223] By turning off the fourth switch, the charging and discharging circuit can be shut off from the position of the adjacent cell electrode. Thus, the battery protection circuit in the first mode can stop the cell from supplying power to the external load directly connected to the cell, reducing the power loss caused by the external load that cannot be directly turned off in the first mode, further improving the battery storage time in the first mode, and simplifying the operation method of exiting the first mode.

[0224] Figure 15 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0225] In some embodiments, such as Figure 15 As shown, the battery protection circuit control method may include the following steps:

[0226] S10: Monitor the voltage of the second pin;

[0227] S20: In response to the voltage of the second pin being within the first threshold range for a duration greater than or equal to the first time threshold, control the battery protection circuit to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0228] S50: Monitors the level of the third signal received by the third pin;

[0229] S60: In response to the level value of the third signal received by the third pin being less than or equal to the level signal threshold, the battery protection circuit is controlled to enter the third mode. In the third mode, the fourth switch disconnects the cell and the output terminal so that the cell stops discharging.

[0230] S70: In response to the level signal received by the third pin being greater than the level signal threshold, the battery protection circuit is controlled to enter the fourth mode. In the fourth mode, the fourth switch turns on the cell and the output terminal to discharge the cell. The level signal threshold is dynamically adjusted according to the cell's charge level.

[0231] The integrated circuit can monitor the level signal received by the third pin. When the battery cell has low power, the third signal can be a ground level. When the detected level value is less than or equal to the level signal threshold, the battery protection circuit can be controlled to enter the third mode. The fourth switch disconnects the battery cell from the output terminal to stop the battery cell from discharging and prevent the battery cell from discharging further. This can preserve the battery cell's power and prevent over-discharge when the battery cell is low, thus improving the battery cell's durability.

[0232] When the battery cell has a high charge level, the third signal can be a high-level signal. When the detected level signal is greater than the level signal threshold, the battery protection circuit is controlled to enter the fourth mode. In the fourth mode, the fourth switch connects the battery cell and the output terminal to enable the battery cell to discharge normally and meet the normal power supply requirements of electronic devices.

[0233] Furthermore, by enabling the integrated circuit to dynamically adjust the level signal threshold according to the battery cell's charge level, the battery protection circuit can change the ease with which it enters the third mode under different states, making it easier for the battery protection circuit to enter or avoid accidentally entering the third mode.

[0234] Figure 16 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0235] In some embodiments, such as Figure 16 As shown, the battery protection circuit control method may include the following steps:

[0236] S10: Monitor the voltage of the second pin;

[0237] S20: In response to the voltage of the second pin being within the first threshold range for a duration greater than or equal to the first time threshold, control the battery protection circuit to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0238] S50: Monitors the level of the third signal received by the third pin;

[0239] S60: In response to the level value of the third signal received by the third pin being less than or equal to the level signal threshold, the battery protection circuit is controlled to enter the third mode. In the third mode, the fourth switch disconnects the cell and the output terminal so that the cell stops discharging.

[0240] S70: In response to the level signal received by the third pin being greater than the level signal threshold, the battery protection circuit is controlled to enter the fourth mode. In the fourth mode, the fourth switch turns on the cell and the output terminal to discharge the cell. The level signal threshold is dynamically adjusted according to the cell's charge level.

[0241] S81: Monitors the battery cell's charge level;

[0242] S82: In response to the battery cell's charge being less than or equal to the charge threshold, increase the level signal threshold;

[0243] S83: In response to the battery cell's charge being greater than the charge threshold, the level signal threshold is lowered.

[0244] The integrated circuit can monitor the level signal received at the third pin. When the battery cell's charge is low, the third signal can be at ground level. When the detected level value is less than or equal to the level signal threshold, the battery protection circuit can be controlled to enter the third mode. This involves disconnecting the battery cell from the output terminal via the fourth switch, stopping the battery cell from discharging and preventing further discharge. This conserves the battery cell's charge and prevents over-discharge at low levels, thus improving the cell's durability. Furthermore, the integrated circuit can increase the level signal threshold, making it easier for the battery protection circuit to enter the third mode.

[0245] When the battery cell has a high charge level, the third signal can be a high-level signal. When the detected signal level exceeds the threshold, the battery protection circuit enters the fourth mode. In the fourth mode, the fourth switch connects the battery cell and the output terminal, allowing the battery cell to discharge normally and meet the normal power supply requirements of the electronic device. Furthermore, the integrated circuit can lower the signal level threshold, making it more difficult for the battery protection circuit to enter the third mode. This prevents temporary signal level fluctuations caused by load power-on during normal operation and power-on of the electronic device from causing the battery protection circuit to enter the third mode.

[0246] Figure 17 This is a flowchart illustrating a battery protection circuit control method according to an exemplary embodiment.

[0247] In some embodiments, such as Figure 17 As shown, the battery protection circuit control method may include the following steps:

[0248] S10: Monitor the voltage of the second pin;

[0249] S20: In response to the voltage of the second pin being within the first threshold range, the battery protection circuit is controlled to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0250] S50: Monitors the level of the third signal received by the third pin;

[0251] S61: The duration during which the level of the third signal received at the third pin is less than or equal to the level signal threshold is greater than or equal to the first time threshold.

[0252] S62: The duration of the third signal received by the third pin is greater than or equal to the third time threshold.

[0253] S63: In response to the duration of the level signal received on the third pin being greater than or equal to the trigger threshold being greater than or equal to the third threshold time, the battery protection circuit is controlled to enter the third mode.

[0254] S70: In response to the level signal received by the third pin being greater than the level signal threshold, the battery protection circuit is controlled to enter the fourth mode. In the fourth mode, the fourth switch turns on the cell and the output terminal to discharge the cell. The level signal threshold is dynamically adjusted according to the cell's charge level.

[0255] The integrated circuit can monitor the level signal received by the third pin. When the battery cell has low power, the third signal can be at ground level. When the detected level value is less than or equal to the level signal threshold, the duration of the third signal received by the third pin can be further determined. When the event of the third signal exceeding the level signal threshold exceeds the third time threshold, it can be considered that the battery protection circuit needs to enter the third mode. The battery protection circuit is controlled to enter the third mode, and the fourth switch disconnects the battery cell and the output terminal to stop the battery cell from discharging, prevent the battery cell from discharging further, preserve the battery cell's power, prevent the battery cell from over-discharging when the power is low, and improve the battery cell's durability.

[0256] When the battery cell has a high charge level, the third signal can be a high-level signal. When the detected level signal is greater than the level signal threshold, the battery protection circuit is controlled to enter the fourth mode. In the fourth mode, the fourth switch connects the battery cell and the output terminal to enable the battery cell to discharge normally and meet the normal power supply requirements of electronic devices.

[0257] Based on the same concept, embodiments of this disclosure also provide a battery protection circuit control device.

[0258] Figure 18 This is a block diagram illustrating a battery protection circuit control device according to an exemplary embodiment.

[0259] In some embodiments, such as Figure 18 As shown, the battery protection circuit control device may include a monitoring unit 51 and an execution unit 52.

[0260] Monitoring unit 51 is used to monitor the voltage of the second pin;

[0261] The execution unit 52 is used to control the battery protection circuit to exit the first mode and enter the second mode in response to the voltage of the second pin being within the first threshold range for a duration greater than or equal to a first time threshold. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

[0262] In some embodiments, the execution unit 52 controls the battery protection circuit to exit the first mode and enter the second mode by the following method:

[0263] The execution unit 52 controls the second switch to disconnect the connection between the first pin and the first pole, and controls the third switch to disconnect the connection between the second pin and the second pole; wherein the second switch is located between the first pin and the first pole, and the third switch is located between the second pin and the second pole.

[0264] In some embodiments, the monitoring unit 51 is further configured to determine that the duration for which the voltage of the second pin is within a first threshold range is greater than or equal to a first time threshold before the control battery protection circuit exits the first mode.

[0265] In some embodiments, the execution unit 52 is further configured to control the battery protection circuit to enter a first mode in response to the duration of the first signal received by the third pin connected to the output pin of the control element being greater than or equal to a second time threshold.

[0266] In some embodiments, before controlling the battery protection circuit to enter the first mode, the monitoring unit 51 is also used to determine that the duration for which the third pin receives the first signal is greater than or equal to a second time threshold.

[0267] In some embodiments, the execution unit 52 controls the battery protection circuit to enter a first mode by means of the following method: turning on the first pin and the first terminal by a second switch, and turning on the second pin and the second terminal by a third switch; wherein the second switch is disposed between the first pin and the first terminal, and the third switch is disposed between the second pin and the second terminal.

[0268] In some embodiments, the execution unit 52 is further configured to control the fourth switch to turn on the battery cell and the output terminal in response to the battery protection circuit being in the second mode, so as to discharge the battery cell;

[0269] The execution unit 52 is also configured to control the fourth switch to disconnect the battery cell and the output terminal in response to the battery protection circuit being in the first mode, so that the battery cell stops discharging; wherein the fourth switch is disposed between the battery cell and the output terminal.

[0270] In some embodiments, after the battery protection circuit enters the second mode...

[0271] The monitoring unit 51 is also used to monitor the level value of the third signal received by the third pin;

[0272] The execution unit 52 is also used to control the battery protection circuit to enter the third mode in response to the level value of the third signal received by the third pin being less than or equal to the level signal threshold. In the third mode, the fourth switch disconnects the cell and the output terminal so that the cell stops discharging.

[0273] The execution unit 52 is also used to control the battery protection circuit to enter a fourth mode in response to the level signal received by the third pin being greater than the level signal threshold. In the fourth mode, the fourth switch turns on the cell and the output terminal to discharge the cell. The level signal threshold is dynamically adjusted according to the cell's charge level.

[0274] In some embodiments, the monitoring unit 51 is also used to monitor the charge of the battery cell;

[0275] The execution unit 52 is also used to increase the level signal threshold in response to the battery cell's charge being less than or equal to the charge threshold;

[0276] The execution unit 52 is also used to reduce the level signal threshold in response to the battery cell having a charge level greater than the charge threshold.

[0277] In some embodiments, the execution unit 52 controls the battery protection circuit to enter a third mode in response to a level signal received at the third pin being less than or equal to a level signal threshold:

[0278] The execution unit 52 is used in response to a third signal received at the third pin having a level less than or equal to a level signal threshold.

[0279] The monitoring unit 51 is used to monitor whether the duration of the third signal received by the third pin is greater than or equal to the third time threshold.

[0280] The execution unit 52 is used to control the battery protection circuit to enter the third mode in response to the duration of the level signal received by the third pin being greater than or equal to the level signal threshold being greater than or equal to the third threshold time.

[0281] Regarding the battery protection circuit control device in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0282] Based on the same concept, embodiments of this disclosure also provide an apparatus for controlling a battery protection circuit.

[0283] In some embodiments, the means for controlling the battery protection circuit may include: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute a battery protection circuit control method.

[0284] Figure 19 This is a block diagram illustrating an apparatus for controlling a battery protection circuit according to an exemplary embodiment.

[0285] Reference Figure 19 The device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, an input / output (I / O) interface 812, and a sensor component 814.

[0286] Processing component 802 typically controls the overall operation of device 800, such as operations associated with data communication and recording operations. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0287] Memory 804 is configured to store various types of data to support the operation of device 800. Examples of this data include instructions for any application or method operating on device 800. Memory 804 can be implemented by any type of volatile or non-volatile storage device 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 storage, flash memory, magnetic disk, or optical disk.

[0288] The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 800.

[0289] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0290] Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of device 800. For example, sensor assembly 814 can detect the on / off state of device 800, the relative positioning of components such as the display and keypad of device 800, changes in the position of device 800 or a component of device 800, the presence or absence of user contact with device 800, the orientation or acceleration / deceleration of device 800, and temperature changes of device 800.

[0291] Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. Sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0292] In some exemplary embodiments, device 800 may include a multimedia component 808, which includes a screen providing an output interface between device 800 and a 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 touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0293] In some exemplary embodiments, device 800 may include an audio component 810 configured to output and / or input sound signals. For example, audio component 810 includes a microphone (MIC) configured to receive external sound signals when device 800 is in an operating mode, such as a call mode, recording mode, or voice recognition mode. The received sound signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting sound signals.

[0294] In some exemplary embodiments, device 800 may include a communication component 816 configured to facilitate wired or wireless communication between device 800 and other devices. Device 800 may access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 further includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0295] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0296] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0297] It is further understood that the terms "second," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "second," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, second information can also be referred to as second information, and similarly, second information can also be referred to as second information.

[0298] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0299] It can be further understood that, unless otherwise specified, "connection" includes both direct connections where no other components exist between the two parties and indirect connections where other components exist between them.

[0300] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0301] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following scope of claims.

[0302] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery protection circuit, characterized in that, The battery protection circuit includes: Battery cell; The integrated circuit includes a first pin and a second pin. When the battery protection circuit is in a first mode, the first pin is connected to the first terminal of the battery cell, and the second pin is connected to the second terminal of the battery cell. A first switch, one end of which is connected to the first pin, and the other end of which is connected to the second pin; When the battery protection circuit is in the first mode and the first switch is turned on, the first pin and the second pin are connected through the first switch so that the voltage of the second pin is within the first threshold range. The battery protection circuit then exits the first mode and enters the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

2. The battery protection circuit according to claim 1, characterized in that, The integrated circuit also includes: A second switch and a third switch, wherein the second switch is disposed between the first pin and the first pole, and the third switch is disposed between the second pin and the second pole. When the battery protection circuit is in the first mode, the second switch connects the first pin and the first terminal, and the third switch connects the second pin and the second terminal. When the battery protection circuit is in the second mode, the second switch disconnects the connection between the first pin and the first terminal, and the third switch disconnects the connection between the second pin and the second terminal.

3. The battery protection circuit according to claim 2, characterized in that, The integrated circuit also includes: A first resistor is disposed between the second switch and the first pin; The second resistor is positioned between the third switch and the second pin.

4. The battery protection circuit according to any one of claims 1-3, characterized in that, The first electrode is the negative electrode of the battery cell, the second electrode is the positive electrode of the battery cell, and the battery protection circuit further includes a control element, which includes an output pin. The integrated circuit also includes a third pin connected to the output pin. When the battery protection circuit is in the second mode, the control element sends a first signal to the third pin through the output pin, causing the battery protection circuit to enter the first mode.

5. The battery protection circuit according to claim 4, characterized in that, The control element further includes a receiving pin connected to the first switch, and the battery protection circuit further includes: The first capacitor-resistor circuit includes a third resistor and a third capacitor. The third resistor is disposed between the output pin and the third pin. One end of the third capacitor is connected between the output pin and the third pin, and the other end of the third capacitor is connected to the second electrode. The second capacitor-resistor circuit includes a fourth resistor and a fourth capacitor. The fourth resistor is disposed between the receiving pin and the second pin. One end of the fourth capacitor is connected between the receiving pin and the second pin, and the other end of the fourth capacitor is connected to the second electrode.

6. The battery protection circuit according to claim 1, characterized in that, The battery protection circuit also includes: Output terminal; A fourth switch is located between the battery cell and the output terminal; When the battery protection circuit is in the second mode, the fourth switch connects the battery cell and the output terminal to discharge the battery cell. When the battery protection circuit is in the first mode, the fourth switch disconnects the battery cell and the output terminal to stop the battery cell from discharging.

7. A battery protection board, characterized in that, include: The battery protection circuit as described in any one of claims 1 to 6.

8. A battery, characterized in that, include: The battery protection circuit as described in any one of claims 1 to 6, or The battery protection board as described in claim 7.

9. An electronic device, characterized in that, include: The battery protection circuit as described in any one of claims 1 to 6, or The battery as described in claim 7.

10. A battery protection circuit control method, characterized in that, The battery protection circuit is the battery protection circuit according to any one of claims 1 to 6, and the method includes: Monitor the voltage at the second pin; In response to the voltage of the second pin being within a first threshold range for a duration greater than or equal to a first time threshold, the battery protection circuit is controlled to exit the first mode and enter the second mode. In the first mode, the power consumption of the battery protection circuit is less than the threshold, and in the second mode, the power consumption of the battery protection circuit is greater than the threshold.

11. The battery protection circuit control method according to claim 10, characterized in that, The control of the battery protection circuit to exit the first mode and enter the second mode includes: Control the second switch to disconnect the connection between the first pin and the first pole, and control the third switch to disconnect the connection between the second pin and the second pole; The second switch is disposed between the first pin and the first pole, and the third switch is disposed between the second pin and the second pole.

12. The battery protection circuit control method according to claim 10, characterized in that, The battery protection circuit control method further includes: In response to the third pin, which is connected to the output pin of the control element, receiving a first signal for a duration greater than or equal to a second time threshold, the battery protection circuit is controlled to enter the first mode.

13. The battery protection circuit control method according to claim 12, characterized in that, The control of the battery protection circuit to enter the first mode includes: The first pin and the first electrode are connected by the second switch, and the second pin and the second electrode are connected by the third switch; The second switch is disposed between the first pin and the first pole, and the third switch is disposed between the second pin and the second pole.

14. The battery protection circuit control method according to claim 10, characterized in that, The method further includes: In response to the battery protection circuit being in the second mode, the fourth switch is controlled to turn on the battery cell and the output terminal so as to discharge the battery cell. In response to the battery protection circuit being in the first mode, the fourth switch is controlled to disconnect the battery cell and the output terminal so that the battery cell stops discharging. The fourth switch is located between the battery cell and the output terminal.

15. The battery protection circuit control method according to claim 10, characterized in that, After the battery protection circuit enters the second mode, the method further includes: Monitor the level of the third signal received by the third pin; In response to the level value of the third signal received by the third pin being less than or equal to the level signal threshold, the battery protection circuit is controlled to enter the third mode. In the third mode, the fourth switch disconnects the battery cell and the output terminal so that the battery cell stops discharging. In response to a level signal received at the third pin exceeding a level signal threshold, the battery protection circuit is controlled to enter a fourth mode. In this fourth mode, the fourth switch connects the battery cell and the output terminal, causing the battery cell to discharge. The level signal threshold is dynamically adjusted according to the battery cell's charge level.

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