CN114784913A

CN114784913A - Battery protection circuit, battery pack, electronic device and electronic pack

Info

Publication number: CN114784913A
Application number: CN202210524103.2A
Authority: CN
Inventors: 宋朋亮; 廖伟宝; 杨健
Original assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Current assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-07-22

Abstract

The embodiment of the application provides a battery protection circuit, which comprises a battery protection module and a first switch unit, wherein the battery protection module comprises a power supply end, a power grounding end, an over-discharge voltage protection unit, a discharge over-current protection unit, a logic control unit and a system end; the battery protection module further comprises a first discharging branch circuit, the first discharging branch circuit comprises a first discharging switch unit, the resistance range of the first discharging branch circuit is 100-20 kilo-ohms when the first discharging switch unit is switched on, the logic control unit controls the first switch unit to be switched off and controls the first discharging switch unit to be switched on after the battery protection circuit receives a reset signal, the logic control unit controls the first switch unit to be switched on and controls the first discharging switch unit to be switched off after the first switch unit is switched off for a first preset time period, and the first preset time period is less than or equal to 1 second. The embodiment of the application also provides a battery assembly, an electronic device and an electronic assembly. The electronic device can rapidly realize reset and restart.

Description

Battery protection circuit, battery pack, electronic device and electronic pack

Technical Field

The present application relates to the field of battery technologies, and in particular, to a battery protection circuit, a battery pack, an electronic device, and an electronic pack.

Background

When a system of an existing electronic device, such as a computer, a mobile phone, a wireless headset, and the like, has a problem, such as a software failure, e.g., a blue screen, a crash, and the like, a user may generally press a power key or other keys for a long time to reset and restart the electronic device, and when the electronic device is restarted, a program is reloaded to remove the failure and restart the electronic device.

The existing electronic device generally needs to be additionally provided with an independent reset chip for realizing reset restart, and the cost is higher. In order to reduce the cost, the prior patent publications CN112117800A, CN112117799A and CN114401468A of the present applicant propose to add a reset function to the battery protection circuit of the electronic device, so that it is not necessary to add a separate reset chip, which is beneficial to reduce the cost. When a system circuit or other external circuits of the electronic device transmit a reset signal to the battery protection circuit, the battery protection circuit controls the first switch unit to be switched off, the first switch unit is switched on after being switched off for a first preset time period, the battery restores to supply power to the system circuit, the system circuit reloads data and programs, and the electronic device realizes normal reset.

Specifically, referring to fig. 15, the conventional electronic device generally includes a battery 910, a battery protection circuit 920 and a system circuit 950, wherein the battery protection circuit 920 includes a battery protection module 930 and a first switch unit 940. The battery protection module 930 includes a power supply terminal VDD ', a power ground terminal GND ', a system terminal VM ', a reset terminal RST ' and a logic control unit, the power supply terminal VDD ' and the power ground terminal GND ' are electrically connected to the positive electrode and the negative electrode of the battery 910, the first terminal of the first switch unit 940 is electrically connected to the negative electrode of the battery 910, the second terminal of the first switch unit 940 is electrically connected to the system terminal VM ', the second terminal of the first switch unit 940 is electrically connected to one end of the system circuit 950, the control terminal of the first switch unit 940 is electrically connected to the logic control unit, and the positive electrode of the battery 910 is electrically connected to the other end of the system circuit 950. Accordingly, the logic control unit may control whether the battery 910 supplies power to the system circuit 950 by controlling the first switching unit 940 to be turned on or off.

Generally, when the battery protection module 930 receives the reset signal through the reset terminal RST', the logic control unit controls the first switch unit 940 to turn off so that the battery 910 stops supplying power to the system circuit 950, and after the first switch unit 940 turns off for a first predetermined time period, the logic control unit controls the first switch unit 940 to turn on to resume the battery 910 supplying power to the system circuit 950.

Disclosure of Invention

The inventors of the present application have found through intensive studies that: the existing electronic device needs a longer time to realize the reset function, resulting in a longer first preset time period, such as a shorter time period requiring more than 3 seconds, and a longer time period even reaching 9 seconds and 10 seconds. The inventors have intensively studied the reason why it takes a relatively long time to realize the reset function, and found that: the system circuit 950 may be generally equivalent to a resistance-capacitance network formed by a second capacitor C2 ' (load capacitor, including a parasitic capacitor or a non-parasitic capacitor) and a second resistor R2 ', the second capacitor C2 ' is connected in parallel with the second resistor R2 ', and when the first switch unit 940 is turned off immediately after receiving the reset signal, the voltage across the second capacitor C2 ' is generally larger, for example, 4.2V, 4.1V, 4V, 3.7V, 3.5V, etc.; in order to reset the system circuit 950, the voltage on the second capacitor C2 'needs to be decreased to be lower than a first threshold voltage, for example, 1V, 0.5V, etc., only the chip in the system circuit 950 that is decreased to be lower than the first threshold voltage can implement the power-off enabling reset, if the voltage on the second capacitor C2' does not decrease to be lower than the first threshold voltage, the first switch unit 940 resumes to be turned on again, the chip in the system circuit 950 does not implement the power-off reset, and the system circuit 950 does not implement the reset. In order to discharge the second capacitor C2 ' after the first switch unit 940 is turned off, the battery protection module 930 generally includes a discharge branch including a discharge switch unit M ' and a discharge resistor Rs ', the discharge switch unit M ' being connected in series with the discharge resistor Rs ', one end of the discharge branch being electrically connected to the power supply terminal VDD ', and the other end of the discharge branch being electrically connected to the system terminal VM '. When the battery protection module 930 receives the reset signal, the logic control unit controls the first switch unit 940 to be turned off and turned on, and controls the discharge switch unit M ' to be turned on, so that the second capacitor C2 ' is discharged through the discharge branch and the second resistor R2 '. The inventor further investigated that the time required for the voltage on the second capacitor C2 'to fall below the first threshold voltage is mainly influenced by the discharge branch and is less influenced by the second resistor R2', and further found that the resistance of the discharge resistor Rs 'is typically as high as 300 kilo-ohms (k Ω) or more and the capacitance of the second capacitor C2' is typically 10 μ F (microfarads). According to the following capacitive discharge equation:

Uc＝U0*e^(-t/RC)

where Uc is a voltage to be discharged, for example, a first threshold voltage, U0 is a voltage on the second capacitor C2 ' when the first switch unit 940 is turned off, e is a natural constant, t represents a discharge time, R is a resistance value of a resistor of a discharge loop, here, a resistance value of the discharge resistor Rs ', and C is a capacitance of the second capacitor C2 '.

The inventors have found that, assuming that the first threshold voltage Uc is 1V, U0 is 4V, R is 300 kohms, and C is 10 μ F, the time required for the second capacitance C2' to drop from 4V to below 1V is calculated to be about 4 seconds, and if it drops to 0V, it takes longer, so that the first preset time period takes 4 seconds or more to successfully achieve the reset, which is the final reason why it takes longer for the system circuit 950 to successfully reset. However, with diversification of user requirements, in some usage scenarios, the electronic device needs to be reset quickly, and in particular, in some usage scenarios, the electronic device needs to be reset in milliseconds. The existing battery protection circuit 920 cannot be implemented, if the existing battery protection circuit 920 is used to implement resetting, then the user uses the electronic device again when the battery protection circuit 920 is still in the resetting process, and since the first switch unit 940 is still in the off state at this time, the battery 910 cannot supply power to the system circuit 950, so that the system circuit 950 cannot be used normally, and bad experience is caused to the use of the user.

The present disclosure provides a battery protection circuit, a battery pack, an electronic device and an electronic pack. The electronic device can be quickly reset.

In order to solve the above technical problem, a first aspect of the embodiments of the present application provides a battery protection circuit, which includes a battery protection module and a first switch unit, where the battery protection module includes a power supply terminal, a power ground terminal, an over-discharge voltage protection unit, a discharge over-current protection unit, a logic control unit, and a system terminal, where the power supply terminal and the power ground terminal are correspondingly electrically connected to a positive electrode and a negative electrode of a battery, the logic control unit is electrically connected to a control terminal of the first switch unit, a first terminal of the first switch unit is electrically connected to the battery, and a second terminal of the first switch unit is electrically connected to the system terminal;

wherein, the battery protection module also comprises a first discharging branch circuit, the first end of the first discharging branch circuit is electrically connected with the power supply end or the power grounding end of the power supply, the second end of the first discharging branch circuit is electrically connected with the system end, the first discharging branch circuit comprises a first discharging switch unit, the control end of the first discharging switch unit is electrically connected with the logic control unit, the resistance value of the first discharging branch circuit ranges from 100 ohms to 20 kilo-ohms when the first discharging switch unit is turned on, when the battery protection circuit receives the reset signal, the logic control unit controls the first switch unit to be switched off and controls the first discharge switch unit to be switched on, the first switch unit is turned off for a first preset time period, the logic control unit controls the first switch unit to be turned on and controls the first discharge switch unit to be turned off, and the first preset time period is less than or equal to 1 second.

Optionally, the logic control unit includes a reset detection control unit and a discharge overcurrent control unit, wherein the discharge overcurrent control unit is electrically connected to the discharge overcurrent protection unit, the discharge overcurrent protection unit is electrically connected to the system terminal, the reset detection control unit is electrically connected to an enable terminal of the discharge overcurrent control unit, and when the reset detection control unit receives a reset signal, the reset detection control unit outputs a second signal to control the first switch unit to be turned off and control the first discharge switch unit to be turned on, and the reset detection control unit further outputs an enable signal to the discharge overcurrent control unit to stop the discharge overcurrent protection function.

Optionally, the logic control unit includes a reset detection control unit and a discharge overcurrent control unit, wherein the discharge overcurrent control unit is electrically connected to the discharge overcurrent protection unit, the reset detection control unit is electrically connected to an enable terminal of the discharge overcurrent protection unit, and when the reset detection control unit receives a reset signal, the reset detection control unit outputs a second signal to control the first switch unit to be turned off and control the first discharge switch unit to be turned on, and the reset detection control unit further outputs an enable signal to the discharge overcurrent protection unit to stop working with the discharge overcurrent protection function.

Optionally, the reset detection control unit includes a timer, when the reset detection control unit outputs the second signal, the timer starts timing, when the timer times a first preset time period, the reset detection control unit outputs the first signal to control the first switch unit to be turned on and control the first discharge switch unit to be turned off, and the reset detection control unit outputs a disable signal to the enable terminal to recover the discharge overcurrent protection function of the enable terminal.

Optionally, a time when the reset detection control unit outputs the release enable signal is after a time when the reset detection control unit outputs the first signal.

Optionally, the first discharging branch includes a first discharging resistor, the first discharging resistor is connected in series with the first discharging switch unit, and a resistance value of the first discharging resistor is in a range of 100 ohms to 20 kilo-ohms.

Optionally, when the first discharging switch unit is turned on, the resistance value of the first discharging branch is in a range from 1 kilohm to 10 kilohm, and the first preset time period is less than or equal to 500 ms.

Optionally, the battery protection module further includes a second discharging branch, a first end of the second discharging branch is electrically connected to the power supply end or the power ground end, the second end of the second discharge branch circuit is electrically connected with the system end, the second discharge branch circuit comprises a second discharge switch unit and a second discharge resistor, the second discharge switch unit is connected with the second discharge resistor in series, the control end of the second discharge switch unit is electrically connected with the logic control unit, when the battery protection circuit receives a reset signal, the logic control unit controls the first switch unit to be switched off and controls the second discharge switch unit to be switched on, and after the first switch unit is turned off for a first preset time period, the logic control unit controls the first switch unit to be turned on and controls the second discharge switch unit to be turned off, and the resistance value of the second discharge resistor is greater than or equal to 100 kilo-ohms.

Optionally, the battery protection module includes a reset terminal, the reset terminal is configured to receive the reset signal, and the reset terminal is electrically connected to the logic control unit; or,

and the power supply end of the power supply is used for receiving the reset signal.

Optionally, the battery protection module and the first switch unit are located on the same chip, the power supply end is a power supply pin, the power ground end is a power ground pin, the system end is a system pin, the second end of the first switch unit is used for electrically connecting to a system circuit through the system pin, and the second end of the first discharge branch is used for electrically connecting to the system circuit through the system pin; or,

the battery protection module is positioned on the first chip, the first switch unit is positioned outside the first chip, the power supply end is a power supply pin, the power grounding end is a power grounding pin, the system end is a system pin, the second end of the first discharge branch circuit is electrically connected with a system circuit through the system pin, the second end of the first switch unit is electrically connected with the system circuit, the battery protection module further comprises a switch control pin, and the switch control pin is electrically connected with the control end of the first switch unit; or,

the first end of the first switch unit is electrically connected with the negative electrode of the battery, the second end of the first switch unit is electrically connected with the system end, the system end is electrically connected with the system circuit, and when the first discharge switch unit is switched on, the time required for discharging the voltage between the power supply end and the system end to be below a first threshold voltage is less than 1 second, wherein the range of the first threshold voltage is less than or equal to 1V; or,

the first end of the first switch unit is electrically connected with the positive electrode of the battery, the second end of the first switch unit is electrically connected with the system end, the system end is electrically connected with the system circuit, when the first discharge switch unit is switched on, the time required for the voltage between the system end and the power supply grounding end to discharge below a first threshold voltage is less than 1 second, and the range of the first threshold voltage is less than or equal to 1V.

Optionally, the first switch unit includes a charging switch subunit and a discharging switch subunit, the charging switch subunit and the discharging switch subunit are connected in series, a control end of the charging switch subunit and a control end of the discharging switch subunit are respectively electrically connected to the logic control unit, and the logic control unit controls the discharging switch subunit to keep being disconnected after the battery protection circuit receives a reset signal; or,

the first switch unit comprises a switch tube and a substrate control circuit, the control end of the switch tube is electrically connected with the logic control unit, the substrate control circuit is electrically connected with the switch tube and the logic control unit respectively, the substrate control circuit is used for controlling different bias states of the substrate of the switch tube, the logic control unit controls the switch tube to be kept disconnected after the battery protection circuit receives a reset signal, and the substrate control circuit controls the substrate of the switch tube to be biased to a discharge cut-off state.

A second aspect of embodiments of the present application provides a battery pack, including:

a battery;

in the above battery protection circuit, the power supply end and the power ground end of the battery protection circuit are correspondingly electrically connected to the positive electrode and the negative electrode of the battery, and the battery is electrically connected to the system circuit via the first switch unit.

A third aspect of the embodiments of the present application provides an electronic device, which includes a system circuit, and further includes the above battery protection circuit or includes the above battery assembly, where one end of the system circuit is electrically connected to the second end of the first switch unit, and another end of the system circuit is used to be electrically connected to the battery.

A fourth aspect of the embodiments of the present application provides an electronic assembly, including a storage device and the electronic device described above, where the electronic device can be placed in the storage device, the electronic device further includes a plurality of first contacts, the storage device includes a plurality of second contacts, and when the electronic device is placed in the storage device, the second contacts contact with the first contacts to realize electrical connection therebetween.

Optionally, the system circuit sends a reset signal to the battery protection circuit; or,

when the accommodating device detects that an electronic device is placed in the accommodating device, the accommodating device sends a reset signal to a battery protection circuit of the electronic device.

Optionally, the first contact includes a first communication contact, and the battery protection module and the system circuit are both electrically connected to the first communication contact; the second contact comprises a second communication contact in contacting electrical connection with the first communication contact; the communication signal output by the storage device to the system circuit is a first pulse signal, the communication signal output by the storage device to the battery protection module is a second pulse signal, the voltage corresponding to the logic high level of the first pulse signal is smaller than the voltage corresponding to the logic high level of the second pulse signal, and when the storage device outputs the first pulse signal through the second communication contact and the first communication contact, the battery protection module identifies that the first pulse signal is a continuous logic low level signal.

According to the embodiment of the application, the battery protection module comprises a first discharging branch, a first end of the first discharging branch is electrically connected with a power supply end or a power grounding end, a second end of the first discharging branch is electrically connected with a system end, the first discharging branch comprises a first discharging switch unit, a control end of the first discharging switch unit is electrically connected with a logic control unit, when the first discharging switch unit is switched on, the resistance range of the first discharging branch is 100 ohm-20 kilo ohm, after the battery protection circuit receives a reset signal, the logic control unit controls the first switch unit to be switched off and controls the first discharging switch unit to be switched on, after the first switch unit is switched off for a first preset time period, the logic control unit controls the first switch unit to be switched on and controls the first discharging switch unit to be switched off, and the first preset time period is less than or equal to 1 second. Therefore, after the battery protection module receives the reset signal, the voltage of the second capacitor of the system circuit can be quickly released below the first threshold voltage through the first discharging branch circuit, so that the quick reset and restart of the system circuit can be realized, the reset and restart time is less than or equal to 1 second, even if a user quickly needs to use the electronic device, the electronic device can be normally used, and the use experience of the user is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a circuit block diagram of an electronic assembly according to a first embodiment of the present application;

FIG. 2 is a circuit block diagram of an electronic assembly according to a second embodiment of the present application;

FIG. 3 is a circuit block diagram of an electronic assembly according to another embodiment of the present application;

FIG. 4 is a specific circuit block diagram of a battery protection circuit according to a second embodiment of the present application;

fig. 5 is a specific circuit block diagram of a logic control unit, a first switch unit, a first discharging branch and a second discharging branch according to a second embodiment of the present application;

FIG. 6 is a circuit block diagram of an electronic assembly according to a third embodiment of the present application;

FIG. 7 is a circuit block diagram of an electronic assembly according to another embodiment of the present application;

fig. 8 is a specific circuit block diagram of a battery protection circuit according to a third embodiment of the present application;

fig. 9 is a specific circuit block diagram of the logic control unit, the first switch unit, the first discharging branch and the second discharging branch in the third embodiment of the present application;

fig. 10 is a detailed circuit block diagram of a battery protection circuit according to a fourth embodiment of the present application;

FIG. 11 is a circuit block diagram of an electronic assembly according to a fifth embodiment of the present application;

fig. 12 is a specific circuit block diagram of a battery protection circuit according to a fifth embodiment of the present application;

FIG. 13 is a detailed circuit block diagram of a battery protection circuit according to another embodiment of the present application;

fig. 14 is a specific circuit block diagram of a battery protection circuit according to a sixth embodiment of the present application;

fig. 15 is a circuit block diagram of a conventional electronic apparatus.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," and any variations thereof, as appearing in the specification, claims and drawings of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order. The electrical connection of the present application includes direct electrical connection and indirect electrical connection, and the indirect electrical connection means that other electronic components, pins, and the like may also exist between two electrically connected components. The terminal XX referred to in this application may or may not be an actual terminal, such as only one terminal of a component or one terminal of a wire. Three cases are mentioned and/or included in the present application, for example, a and/or B, including A, B, A and B.

An embodiment of the present application provides an electronic assembly, which includes an electronic device and a storage device, wherein when the electronic device is not in use, the electronic device can be stored in the storage device, the storage device can charge the electronic device, and the storage device can also send various communication signals to the electronic device, the electronic device is, for example, a Wireless headset, the Wireless headset is, for example, a TWS (True Wireless Stereo) headset, and the storage device is, for example, a charging bin. In addition, in other embodiments of the present application, the electronic component may further include only an electronic device, and does not include a storage device, where the electronic device is, for example, a wireless headset, a mobile phone, a tablet computer, and the like. The following description will be made by taking an example in which the electronic device is a wireless headset and the storage device is a charging chamber.

Referring to fig. 2, in the present application, the electronic device includes a battery assembly 100 and a system circuit 150, the system circuit 150 is a circuit composed of a microprocessor, a bluetooth chip, an audio chip, and the like, the system circuit 150 is electrically connected to the battery assembly 100, and the battery assembly 100 is used for supplying power to the system circuit 150. The battery assembly 100 includes a battery 110 and a battery protection circuit 120, the battery protection circuit 120 is electrically connected to the positive electrode and the negative electrode of the battery 110, respectively, the battery 110 supplies power to the battery protection circuit 120, and the battery protection circuit 120 protects the battery, for example, when the battery 110 is overcharged or overdischarged, the battery protection circuit 120 protects the battery, and since how the battery protection circuit 120 protects the battery 110 from overcharge and overdischarge is a common technical means in the art, the description thereof is omitted here. In the present application, the number of the battery 110 is one or more, the battery 110 is preferably a rechargeable battery such as a lithium battery, a nickel cadmium battery, a nickel hydrogen battery, etc., and the capacity of the battery 110 is 10mAH to 80mAH, and preferably, the capacity of the battery 110 is 20mAH to 40 mAH. In addition, a first resistor R1 and a first capacitor C1 are further arranged between the battery 110 and the battery protection circuit 120, the first resistor R1 and the first capacitor C1 are arranged for filtering, and the resistance value of the first resistor R1 is generally 100 Ω -1k Ω. In addition, in other embodiments of the present application, other circuits or electronic elements may be disposed between the battery 110 and the battery protection circuit 120, and the first resistor R1 and the first capacitor C1 may not be disposed.

In the present application, please refer to fig. 2 continuously, the battery protection circuit 120 includes a battery protection module 130, and the battery protection module 130 is used for protecting the battery 110, preventing the battery 110 from being damaged under the conditions of over-discharge voltage, over-discharge current, over-temperature, and the like, and preventing the battery 110 from being damaged. In this application, the battery protection module 130 includes a power supply terminal VDD, a power ground terminal GND, a reference voltage generation unit 138, an over-discharge voltage protection unit 131, a discharge over-current protection unit 134, a logic control unit 160, an over-charge voltage protection unit 132, a charge over-current protection unit 133, a system terminal VM, a short-circuit protection unit 135, a temperature protection unit 136, a reference frequency generation unit 137, and the like, where the power supply terminal VDD and the power ground terminal GND are electrically connected to the positive and negative electrodes of the battery 110, respectively, so that the battery 110 can supply power to the battery protection module 130. The system side VM is used to monitor the current flowing through the system circuit 150, but may have other functions. In addition, in other embodiments of the present application, a current detection end may be further provided, where the discharging overcurrent protection unit 134 is electrically connected to the current detection end, and the current detection end is used to detect a current flowing in the system circuit, specifically, the current detection end is used to be electrically connected to one end of the detection resistor, the one end of the detection resistor is further electrically connected to the first end of the first switch unit, and the other end of the detection resistor is electrically connected to the positive electrode of the battery or the negative electrode of the battery.

In the present application, the reference voltage generating unit 138 supplies different reference voltages to the over-discharge voltage protecting unit 131, the discharge over-current protecting unit 134, the over-charge voltage protecting unit 132, the charge over-current protecting unit 133, the short circuit protecting unit 135, the temperature protecting unit 136, etc., thereby determining whether the battery 110 is in an over-discharge voltage state, a discharge over-current state, a short circuit state, etc.

The over-discharge voltage protection unit 131 is used for protecting the battery 110 when detecting that the voltage of the battery 110 is lower than the reference voltage provided by the reference voltage generation unit 138 during the discharging process of the battery 110, for example, controlling the battery 110 to perform only the minimum discharging, and generally stopping supplying power to the system circuit 150, so as to prevent the battery 110 from being permanently damaged due to over-discharging of the battery 110.

The discharge overcurrent protection unit 134 is used for protecting the battery 110 and the system circuit 150 when detecting that the discharge current is too large in the discharge process of the battery 110, for example, the battery 110 stops discharging, and the like, so as to prevent the battery 110 from being permanently damaged or having a safety problem due to the too large discharge current.

The logic control unit 160 is used for controlling the operating state and control logic of each unit of the battery protection module 130, and controlling whether the battery 110 is discharged to the outside or whether the battery 110 is charged.

The overcharge voltage protection unit 132 is used for protecting the battery 110 when the voltage of the battery 110 is detected to be higher than the reference voltage provided by the reference voltage generation unit 138 during the charging process of the battery 110, so as to prevent the battery 110 from being charged again after being fully charged, and prevent the battery 110 from being damaged.

The charging overcurrent protection unit 133 is used to protect the battery 110 when detecting that the charging current is too large during the charging process of the battery 110, for example, to stop charging the battery 110, so as to prevent the charging current from being too large and causing permanent damage or safety problems to the battery 110.

In the present application, the battery protection circuit 120 further includes a first switch unit 140, the first switch unit 140 is used to control whether the battery 110 supplies power to the system circuit 150, and the connection manner of the first switch unit 140 and the battery protection module 130 is generally as follows, although those skilled in the art may also make simple modifications to the circuit described below as needed, which is also within the scope of the present application.

1. Referring to fig. 2, the battery protection module 130 includes a switch control terminal CO/DO electrically connected to the logic control unit 160, a control terminal of the first switch unit 140 is electrically connected to the switch control terminal, a first terminal of the first switch unit 140 is electrically connected to a negative electrode of the battery 110 (the first switch unit 140 is disposed below), the negative electrode of the battery 110 is grounded, a second terminal of the first switch unit 140 is electrically connected to the system terminal VM, the second terminal of the first switch unit 140 is further electrically connected to the system circuit 150, and a positive electrode of the battery 110 is electrically connected to the system circuit 150. In this embodiment, the logic control unit 160 controls the first switch unit 140 to turn on or off through the switch control terminal, so that, when the logic control unit 160 controls the first switch unit 140 to turn on, the battery 110 can supply power to the system circuit 150 through the first switch unit 140 at this time, and the system circuit 150 is in the normal operating mode; when the logic control unit 160 controls the first switching unit 140 to be turned off, the battery 110 stops supplying power to the system circuit 150. In an embodiment of the present application, the battery protection module 130 is located on a first chip, at this time, the power supply terminal VDD is a power supply pin, the power ground terminal GND is a power ground pin, the system terminal VM is a system pin, the switch control terminal CO/DO is a switch control pin, the first switch unit 140 may be located on another chip, that is, the first switch unit 140 and the battery protection module 130 are located on different chips, the first switch unit 140 may not be located on a chip, and the first switch unit 140 is located outside the battery protection module 130 (the first switch unit 140 is external).

2. Referring to fig. 3, the first switch unit 140 and the battery protection module 130 are located on the same chip (the first switch unit 140 is built in), at this time, the control terminal of the first switch unit 140 is electrically connected to the logic control unit 160, the first terminal of the first switch unit 140 is electrically connected to the power ground GND, the power ground GND is electrically connected to the negative electrode of the battery 110 (the first switch unit 140 is placed below), the second terminal of the first switch unit 140 is electrically connected to the system terminal VM of the battery protection module 130, the system terminal VM is electrically connected to the system circuit 150, and the positive electrode of the battery 110 is electrically connected to the system circuit 150. In the present embodiment, the logic control unit 160 controls the first switch unit 140 to turn on or off. At this time, the power supply terminal VDD is a power supply pin, the power ground terminal GND is a power ground pin, and the system terminal VM is a system pin.

3. Referring to fig. 6, the battery protection module 130 includes a switch control terminal CO/DO, the switch control terminal is electrically connected to the logic control unit 160, the control terminal of the first switch unit 140 is electrically connected to the switch control terminal, the first terminal of the first switch unit 140 is electrically connected to the positive electrode of the battery 110 (the first switch unit 140 is disposed above), the second terminal of the first switch unit 140 is electrically connected to the system terminal VM, the second terminal of the first switch unit 140 is further electrically connected to the system circuit 150, and the negative electrode of the battery 110 is electrically connected to the system circuit 150. In the present embodiment, the logic control unit 160 controls the first switch unit 140 to turn on or off through the switch control terminal. In an embodiment of the present application, the battery protection module 130 is located on a first chip, and the first switch unit 140 may be located on another chip, that is, the first switch unit 140 and the battery protection module 130 are located on different chips, or the first switch unit 140 may not be located on a chip, and the first switch unit 140 is located outside the battery protection module 130 (the first switch unit 140 is external).

4. Referring to fig. 7, the first switch unit 140 and the battery protection module 130 are located on the same chip (the first switch unit 140 is built-in), at this time, the control terminal of the first switch unit 140 is electrically connected to the logic control unit 160, the first terminal of the first switch unit 140 is electrically connected to the power supply terminal VDD, the power supply terminal VDD is electrically connected to the positive electrode of the battery 110 (the first switch unit 140 is placed on top), the second terminal of the first switch unit 140 is electrically connected to the system terminal VM, the system terminal VM is electrically connected to the system circuit 150, and the negative electrode of the battery 110 is electrically connected to the system circuit 150. In the present embodiment, the logic control unit 160 controls the first switch unit 140 to turn on or off.

In the above 4 connection modes, the first switch unit 140 includes a charging switch subunit 140c and a discharging switch subunit 140d (see fig. 4), and the charging switch subunit 140c is connected in series with the discharging switch subunit 140 d. Wherein, the charging switch subunit 140c and the discharging switch subunit 140d are MOS or other suitable field effect transistors, such as NMOS transistor or PMOS transistor, etc., the charging switch subunit 140c and the discharging switch subunit 140d are electrically connected to the logic control unit 160, for example, in fig. 2 and fig. 6, the switch control terminal CO/DO of the battery protection module 130 includes a charging switch control terminal CO and a discharging switch control terminal DO, the charging switch control terminal CO is electrically connected to the control terminal of the charging switch subunit 140c, the discharging switch control terminal DO is electrically connected to the control terminal of the discharging switch subunit 140d, the charging switch control terminal CO and the discharging switch control terminal DO are electrically connected to the logic control unit 160, respectively, so as to control the charging switch subunit 140c and the discharging switch subunit 140d by the logic control unit 160, when the battery 110 needs to stop supplying power to the system circuit 150, the logic control unit 160 controls the discharging switch subunit 140d to remain off, and the charging switch subunit 140c can be turned on, so that the battery 110 can be charged by the charging device or the charging bin, but the battery 110 will not be discharged to the system circuit 150. In addition, in other embodiments of the present application, for example, referring to fig. 3 and fig. 7, the first switch unit 140 may further include a switch tube and a substrate control circuit, the switch tube is a MOS tube or other field effect tube, a control end of the switch tube is electrically connected to the logic control unit, the substrate control circuit is electrically connected to the logic control unit 160, the substrate control circuit is configured to implement a correct bias of a substrate of the switch tube, for example, the switch tube is in different biases when the battery 110 is discharged and the battery 110 is charged, when the battery 110 needs to stop supplying power to the system circuit 150, the logic control unit 160 controls the switch tube to be kept off, and the substrate bias of the switch tube is controlled to be in a discharge off state by the substrate control circuit, where the discharge off state refers to: the battery 110 cannot be discharged to the system circuit 150, the battery 110 can be charged by a charging device or a charging bin or the battery 110 cannot be charged. However, the present application is not limited thereto, and in other embodiments of the present application, the first switch unit 140 may also be implemented in other forms, for example, only include one switch tube, and the switch tube controls the discharge at this time.

In this application, the first switch unit 140 is used to control the battery 110 to supply power to the system circuit 150, and specifically, a discharge loop is formed by the battery 110, the first switch unit 140, and the system circuit 150 to supply power to the system circuit 150. When the battery protection module 130 controls the first switch unit 140 to be turned off, the system circuit 150 is disconnected from the discharge loop of the battery 110, and the system circuit 150 is not powered by the battery 110; when the first switch unit 140 is turned on, the system circuit 150 is powered by the battery 110 through the first switch unit 140.

In the present application, the system circuit 150 may be generally equivalent to a resistance-capacitance network formed by a second capacitor C2 (load capacitor, including a parasitic capacitor or a non-parasitic capacitor) and a second resistor R2, and the second capacitor C2 is connected in parallel with the second resistor R2. In order to reset the system circuit 150, the voltage on the second capacitor C2 needs to be decreased to be lower than the first threshold voltage, the first threshold voltage is less than or equal to 1V, such as 1V, 0.9V, 0.8V, 0.7V, 0.6V, 0.5V, 0.4V, 0.3V, 0.2V, 0.1V, etc., if the voltage on the second capacitor C2 does not decrease to be lower than the first threshold voltage, the first switch unit 140 resumes on conduction again, the system circuit 150 will not reset, and the data and program will not be reloaded. The second capacitor C2 typically has a capacitance of 5 μ F-50 μ F, such as 5 μ F, 10 μ F, 20 μ F, 30 μ F, 40 μ F, 50 μ F, etc., typically 10 μ F.

In an embodiment of the present application, please refer to fig. 2, fig. 3, fig. 6, and fig. 7, the battery protection module 130 includes a reset terminal RST, the reset terminal RST is configured to receive a reset signal, the reset signal may be from the system circuit 150 or from the charging bin, when the battery protection module 130 receives the reset signal, the logic control unit 160 controls the first switch unit 140 to turn off, so that the battery 110 stops supplying power to the system circuit 150, and after the first switch unit 140 turns off for a first preset time period, the logic control unit 160 controls the first switch unit 140 to turn on, so as to recover the battery 110 supplying power to the system circuit 150. In addition, in other embodiments of the present application, the reset terminal RST may receive other signals besides the reset signal, for example, a shipping signal, that is, the reset terminal RST may have other functions. In other embodiments of the present application, the battery protection module 130 may not include the reset terminal RST, and the battery protection module 130 receives the reset signal through the power supply terminal VDD or other terminals. For how the battery protection module 130 specifically receives the reset signal, reference may be made to patents CN112117800A, CN112117799A, and CN114401468A that are previously applied and published by the applicant, and details thereof are not described herein. The following embodiment is described by taking the battery protection module 130 including the reset terminal RST as an example.

In order to implement active reset restart and fast reset, prevent signal confusion and misjudgment, and improve the user experience, the following specific embodiments are provided in the present application.

First embodiment

Referring to fig. 1, in this embodiment, the wireless headset further includes a plurality of first contacts, and the plurality of first contacts are used to be electrically connected to the charging bin in a contact manner, so that the charging bin charges the wireless headset, communicates with the wireless headset, and the like. In the present embodiment, the battery protection circuit 520 is electrically connected to the first contact. Specifically, in the present embodiment, the number of the first contacts is two, and the first contacts are a first power supply contact GCD1 and a first ground contact DCD1, wherein the first power supply contact GCD1 is electrically connected to the positive electrode of the battery 110 via the charging management circuit, and the first power supply contact GCD1 is further electrically connected to the battery protection module 530 and the system circuit 150; the first ground contact DCD1 is electrically connected to the second terminal of the first switch unit 140, and the first ground contact DCD1 is also electrically connected to the system terminal VM and the system circuit 150. Thus, when the wireless headset is placed back in the charging chamber, the charging chamber can charge the battery 110 through the first power supply contact GCD1 and the first ground contact DCD1, and in this embodiment, the charging chamber can also communicate with the system circuit 150 and the battery protection module 530 through the first power supply contact GCD 1.

In this embodiment, the charging chamber includes a plurality of second contacts and a charging chamber internal circuit 180, the second contacts are electrically connected to the charging chamber internal circuit 180, the number of the second contacts corresponds to the number of the first contacts, and is also two, the second contacts include a second power supply contact GCD2 and a second ground contact DCD2, when the wireless headset is placed in the charging chamber, the second power supply contact GCD2 is electrically connected to the first power supply contact GCD1, and the second ground contact DCD2 is electrically connected to the first ground contact DCD1, so as to implement transmission and communication of power between the charging chamber and the wireless headset. In the present embodiment, the second power supply contact GCD2 and the first power supply contact GCD1 are communication contacts and have a communication function.

In the present embodiment, the first power supply contact GCD1 and the second power supply contact GCD2 are electrically connected in a contact manner, and the first ground contact DCD1 and the second ground contact DCD2 are electrically connected in a contact manner. In this embodiment, the first contact includes a conductive contact piece, a conductive pin, a conductive column, a conductive tongue, or a gold finger, and the second contact includes a pogo pin (pogo pin), or vice versa, so as to achieve a better contact-type electrical connection between the first contact and the second contact.

When the wireless earphone is halted or other software faults occur, in order to reduce the operation of the user or prevent the user from misjudging the wireless earphone to be a hardware fault due to the software fault, especially to prevent the user from having the software fault when the wireless earphone which is fully charged is just taken out from the charging bin for use, and reduce the frequency of the software faults such as halt and the like, the following innovations are performed in the embodiment: after the wireless earphone is placed into the charging bin, the charging bin automatically outputs a reset signal to the wireless earphone, the wireless earphone can send the reset signal to the wireless earphone when the wireless earphone is placed into the charging bin, and can also send the reset signal to the wireless earphone after the wireless earphone is placed into a meeting. After the wireless headset receives the reset signal, the wireless headset controls the first switch unit to turn off, in this embodiment, the first switch unit 140 is a reset switch unit, and after the first switch unit 140 is turned off for a first preset time period, the wireless headset controls the first switch unit 140 to turn on to reset and restart the system circuit 150. That is, as long as the user puts the wireless earphone into the charging bin each time, the charging bin can actively convey a reset signal to the wireless earphone, so that the automatic reset and restart of the wireless earphone are realized, and through the arrangement, even if the wireless earphone is halted or other software faults occur in the prior use process, the software problems can be solved through the reset and restart, so that the wireless earphone can be ensured to be normally used when the wireless earphone is taken out of the charging bin; moreover, through the arrangement, the frequency of the user sensing the software fault of the wireless earphone can be reduced, for example, the wireless earphone has the software fault when the wireless earphone is stopped to use, or the wireless earphone has the software fault after falling off from the ear, or the wireless earphone is judged to be dead by mistake and cannot be used (actually, the software fault is caused), as long as the user places the wireless earphone into the charging bin, the wireless earphone is reset and restarted, the system circuit 150 reloads data and programs, so that the software problem can be solved, when the user takes the wireless earphone for use next time, the software problems of reset and restart, halt and the like of the wireless earphone are solved, so that the wireless earphone can be normally used, the user can not sense the software fault of the wireless earphone, the use experience of the user is greatly improved, and the probability of the user sensing the software fault of the wireless earphone is reduced, the competitiveness of the product is improved.

In order to trigger the charging chamber to send a reset signal, in this embodiment, the charging chamber includes a placement detection unit 581, the placement detection unit 581 is configured to detect whether the wireless headset is placed in the charging chamber, and when the placement detection unit 581 detects that the wireless headset is placed in the charging chamber, the charging chamber outputs a reset signal to the wireless headset, specifically, the reset signal is output to the battery protection module 530 via the second power supply contact GCD2, the first power supply contact GCD1, and the reset terminal RST.

In this embodiment, the insertion detection unit 581 is electrically connected to the second power supply contact GCD2, the insertion detection unit 581 periodically outputs an insertion detection signal to the battery protection module 530 or the system circuit 150, and the battery protection module 530 or the system circuit 150 outputs a feedback signal to the insertion detection unit 581 after receiving the insertion detection signal, so that the insertion detection unit 581 can determine whether the wireless headset is inserted into the charging chamber by determining whether the feedback signal is received, that is, determining whether the wireless headset is inserted into the charging chamber according to an electrical signal on the second power supply contact. The present application is not limited thereto, and in other embodiments of the present application, the placement detecting unit 581 may also determine whether the wireless headset is placed in the charging chamber by detecting a change in the voltage of the second power supply contact GCD 2.

In addition, in other embodiments of the present application, the placement detection unit 581 includes a movable body and a displacement detection subunit, the movable body can elastically move up and down, the wireless headset presses the movable body to move down from an initial position when the wireless headset is placed in the charging chamber, the displacement detection subunit determines that the wireless headset is placed in the charging chamber when the detection subunit detects that the movable body moves down by a threshold displacement, and the movable body moves up to the initial position when the wireless headset is taken out from the charging chamber. Here, the movable body is preferably a pogo pin, that is, a second contact. By setting the threshold displacement, the probability of false detection can be reduced.

In addition, in other embodiments of the present application, the placement detection unit 581 includes a weight sensor, due to the weight of the wireless headset itself, the placement of the wireless headset into the charging chamber and the non-placement of the wireless headset into the charging chamber can be detected by the weight sensor, and when the weight sensor detects that the weight increases by a threshold weight when the wireless headset is placed into the charging chamber, the placement detection unit 581 determines that the wireless headset is placed into the charging chamber. By setting the threshold weight, the probability of false detection can be reduced.

In addition, in other embodiments of the present application, the placement detection unit 581 includes an infrared sensor, a reflection element is disposed on the wireless headset, an emitter of the infrared sensor emits infrared rays, when the wireless headset is placed in the charging chamber, the reflection element reflects the infrared rays, a receiver of the infrared sensor can receive the infrared rays, when the wireless headset is not placed in the charging chamber, the infrared rays are not reflected, and thus through the cooperation of the infrared sensor and the reflection element, the placement detection unit 581 can determine whether the wireless headset is placed in the charging chamber.

In addition, in other embodiments of this application, the storehouse of charging includes the storehouse body and cang gai, and cang gai and storehouse lid are articulated, and cang gai is covered on the storehouse body in order to form and hold the chamber, and wireless earphone can hold in holding the chamber, puts into detecting element 581 including closing the lid detecting element, closes the lid detecting element default when the cang gai and thinks that wireless earphone has put into the storehouse of charging to the storehouse of charging sends reset signal and gives wireless earphone. Certainly, although this kind of circumstances probably appears and the storehouse lid is closed, the user does not put into the storehouse of charging with wireless earphone in reality, and wireless earphone can not receive reset signal under this kind of circumstances, can not influence the normal use in wireless earphone and the storehouse of charging.

In addition, in other embodiments of this application, the storehouse of charging includes the storehouse body and storehouse lid, the storehouse lid is articulated with the storehouse body, the storehouse lid is covered on the storehouse body in order to form and hold the chamber, wireless earphone can hold in holding the chamber, it includes the detecting element that uncaps to put into detecting element 581, the detecting element that uncaps defaultly thinks that wireless earphone has put into the storehouse of charging when the storehouse lid is opened, and the user will take out wireless earphone from the storehouse of charging, also just the wireless earphone just exports reset signal before taking out, set up like this and can prevent that wireless earphone from appearing software faults such as crash in the wireless earphone in the storehouse process of charging for a long time. Therefore, the probability of software faults such as dead halt and the like when the user takes out the wireless earphone from the charging bin can be further reduced. Certainly, although the cover is opened in this kind of circumstances probably appears, actually the user will put into the storehouse of charging with wireless earphone (wireless earphone is not placed in the storehouse of originally charging), wireless earphone does not receive reset signal because do not put into the storehouse of charging under this kind of circumstances, and the storehouse of charging has only sent an invalid signal, puts into the storehouse of charging as wireless earphone, closes the cover back, when the user opens the storehouse of charging next time, the storehouse of charging will send reset signal again for wireless earphone, realizes resetting restart of wireless earphone.

In the present embodiment, the battery protection module 530 includes a reset terminal RST electrically connected to the logic control unit 160 and the first power supply contact GCD1, respectively. When the reset terminal RST receives a reset signal via the first power supply contact GCD1, the logic control unit 160 controls the first switch unit 140 to turn off, so that the battery 110 stops supplying power to the system circuit 150, after the first switch unit 140 turns off for a first preset time period, the logic control unit 160 controls the first switch unit 140 to turn on, and the system circuit 150 reloads the data and the program to reset and restart the system circuit 150.

In addition, in other embodiments of the present application, the number of the first contacts is not limited to two, and the number of the first contacts may also be 3 (see fig. 11) or more than 3, in which case, the plurality of first contacts includes the first power supply contact GCD1, the first ground contact DCD1, the first communication contact TCD1, and the like; the number of the second contacts corresponds to the number of the first contacts, the plurality of second contacts includes a second power supply contact GCD2, a second ground contact DCD2, a second communication contact TCD2, and the like, and the first contacts are electrically connected to the second contacts in a corresponding contact manner. At this time, the first communication contact TCD1 is electrically connected to the battery protection module 530 and the system circuit 150, respectively, and the reset signal output from the charging bin is output to the battery protection module 530 through the second communication contact TCD2 and the first communication contact TCD1, and the first communication contact TCD1 is also electrically connected to the system circuit 150, so that the system circuit 150 communicates with the charging bin through the second communication contact TCD2 and the first communication contact TCD 1. In addition, in other embodiments of the present application, the battery protection module 530 is not limited to providing a separate reset terminal RST, and the reset signal may also be output to the battery protection module 530 through the power supply terminal VDD.

In addition, the reset function is not limited to be set in the battery protection circuit 520, in other embodiments of the present application, a separate reset chip and a reset switch unit may be further added to the wireless headset, the battery 110 supplies power to the system circuit 150 via the reset switch unit and the first switch unit 140, a control terminal of the reset switch unit is electrically connected to the reset chip, the reset chip is electrically connected to the first power supply terminal or the first communication terminal, when the reset chip receives a reset signal output from the charging bin via the first power supply terminal or the first communication terminal, the reset chip controls the reset switch unit to turn off, so that the battery 110 stops supplying power to the system circuit 150, and after the reset switch unit turns off for the first preset time period, the wireless headset controls the reset switch unit to turn on to reset the system circuit 150. In this embodiment, the battery protection circuit 520 may not be provided in the wireless headset.

In the present embodiment, the inventors of the present application have conducted extensive studies to find that a relatively long time is required to implement the reset function through the existing battery protection circuit 520, which results in a relatively long first preset time period, for example, a short time period of 3 seconds or more, and a long time period of 9 seconds or 10 seconds. In the usage scenario of the first embodiment of the present application, it may happen that after the user places the wireless headset into the charging bin, the user takes the wireless headset out for use soon, the existing battery protection circuit 520 cannot implement the reset function for a short time, if the existing battery protection circuit 520 is still used for resetting, then the user uses the electronic device again when the battery protection circuit 520 is still in the reset process, because the first switch unit 140 is still in the off state at this time, the battery 110 cannot supply power to the system circuit 150, so that the system circuit 150 cannot be used normally, or the user needs to wait for several seconds to use normally, and bad experience is caused to the use of the user. In order to solve the technical problem, the present application provides a second embodiment to a fourth embodiment.

In addition, the inventor of the present application has also found that since the first power supply contact GCD1 or the first communication contact TCD1 transmits both the ordinary communication signal and the signal related to the battery protection module 530 to the system circuit 150, for example, the reset signal of the present embodiment or the shipping signal, the battery protection circuit 520 may misinterpret the ordinary communication signal as the reset signal or the shipping signal, which may cause malfunction of the battery protection module 530, for example, the battery protection module 530 controls the first switch unit 140 to be turned off, so that the wireless headset stops working. In order to solve this technical problem, the present application provides fifth to sixth embodiments.

Second embodiment

Referring to fig. 2, fig. 2 is a circuit block diagram of an electronic component according to a second embodiment of the present application, which is similar to the first embodiment, so that the undescribed portion of the present embodiment can refer to the first embodiment.

Referring to fig. 2 and fig. 4, in the present embodiment, the first switch unit 140 is disposed below and the first switch unit 140 is disposed outside. The battery protection module 130 includes a first discharging branch and a second discharging branch, wherein a first end of the first discharging branch and a first end of the second discharging branch are both electrically connected to the power supply terminal VDD, a second end of the first discharging branch and a second end of the second discharging branch are both electrically connected to the system terminal VM, that is, the first discharging branch and the second discharging branch are connected in parallel. In this embodiment, the first discharging branch includes a first discharging switch unit Ms1 and a first discharging resistor Rs1, one end of the first discharging switch unit Ms1 is electrically connected to the power supply terminal VDD, the other end of the first discharging switch unit Ms1 is electrically connected to one end of the first discharging resistor Rs1, the other end of the first discharging resistor Rs1 is electrically connected to the system terminal VM, the control terminal of the first discharging switch unit Ms1 is electrically connected to the logic control unit 160, and the logic control unit 160 can control the first discharging switch unit Ms1 to be turned on or turned off. In addition, in other embodiments of the present application, the positions of the first discharge switch unit Ms1 and the first discharge resistor Rs1 may be exchanged. In this embodiment, the second discharging branch includes a second discharging switch unit Ms2 and a second discharging resistor Rs2, one end of the second discharging switch unit Ms2 is electrically connected to the power supply terminal VDD, the other end of the second discharging switch unit Ms2 is electrically connected to one end of the second discharging resistor Rs2, the other end of the second discharging resistor Rs2 is electrically connected to the system terminal VM, the control terminal of the second discharging switch unit Ms2 is electrically connected to the logic control unit 160, and the logic control unit 160 can control the second discharging switch unit Ms2 to be turned on or turned off. In addition, in other embodiments of the present application, the positions of the second discharge switch unit Ms2 and the second discharge resistor Rs2 may be exchanged. In addition, in another embodiment of the present application, please refer to fig. 3 and fig. 4 in combination, the first switch unit 140 is disposed below and the first switch unit 140 is disposed inside. In addition, in other embodiments of the present application, the first discharge branch may not include the first discharge resistor.

In this embodiment, when the first discharge switch unit is turned on, the resistance of the first discharge branch is in a range of 100 ohms to 20 kilo-ohms. In this embodiment, the resistance range of the first discharging resistor Rs1 is 100 Ω (kilo ohm) -20k Ω (kilo ohm), for example, 20k Ω, 10k Ω, 7k Ω, 6k Ω, 5k Ω, 4k Ω, 3k Ω, 1k Ω, 500 Ω, 100 Ω, and the like, and preferably 1k Ω -10k Ω, so that the discharging current of the second capacitor C2 is not too large when the second capacitor is discharged through the first discharging resistor Rs1, the heat generated by the battery protection module 130 is not too large, and the battery protection module 130 is protected; the resistance of the second discharge resistor Rs2 is greater than or equal to 100k Ω, such as 100k Ω, 200k Ω, 300k Ω, 500k Ω, 700k Ω, 1M Ω (mega ohm), 2M Ω, 3M Ω, 4M Ω, 5M Ω, 6M Ω, 7M Ω, 8M Ω, 9M Ω, 10M Ω, and so on. In this embodiment, the first discharge resistor Rs1 may be implemented by resistor integration, or may be implemented by a MOS transistor, a triode, or the like. In this embodiment, the first discharge switch unit Ms1 is a MOS transistor, preferably a PMOS transistor, but also can be an NMOS transistor, and of course, the first discharge switch unit can also be a triode. In this embodiment, the second discharge switch unit Ms2 is a MOS transistor, preferably a PMOS transistor, but may also be an NMOS transistor, and of course, the second discharge switch unit may also be a triode. In addition, in other embodiments of the present application, when the first discharging branch does not include the first discharging resistor, the resistance of the first discharging switch unit itself when it is turned on may be designed to reach 100 ohms or more.

In this embodiment, after the battery protection module 130 receives the reset signal, the logic control unit 160 controls the first switch unit 140 to turn off, that is, controls the battery 110 to stop supplying power to the system circuit 150, and the logic control unit 160 controls the first discharging switch unit Ms1 and the second discharging switch unit Ms2 to turn on, so that the anode of the second capacitor C2, the first resistor R1, the first discharging branch, the second discharging branch, the system terminal VM, and the cathode of the second capacitor C2 form a discharging loop. Assuming that the resistance of the first discharge resistor Rs1 of the first discharge branch is 5k Ω, and the resistance of the second discharge resistor Rs2 of the second discharge branch is 300k Ω, the parallel resistance of the first discharge branch and the second discharge branch is about 4.9k Ω, and assuming that the resistance of the first resistor R1 is 0.5k Ω, the resistance of the first resistor R1 connected in series with the parallel resistor is about 5.4k Ω, according to the following capacitance discharge formula:

Uc＝U0*e^(-t/RC)

where Uc is a voltage to be discharged, for example, a first threshold voltage, U0 is a voltage across the second capacitor when the first switch unit is turned off, e is a natural constant, t represents a discharge time, R is a resistance value of a resistor of the discharge loop, where C is a capacitance of the second capacitor, and is about 5.4k Ω.

Assuming that the capacitance of the second capacitor C2 is 10 μ F and the second capacitor C2 drops from 4V to below 1V, the time required is about 0.076 seconds, which is 76 milliseconds, so that the second capacitor C2 only needs 76 milliseconds to drop from 4V to below 1V, which is much less than 3 seconds, and thus the first predetermined time period only needs 76 milliseconds or more to reset the system circuit 150. In the present embodiment, the first predetermined time period is less than or equal to 1s, for example, 1s, 900ms, 800ms, 700ms, 600ms, 500ms, 400ms, 300ms, 200ms, 100ms, 90ms, 80ms, 76ms, etc., preferably, the first predetermined time period is less than or equal to 500ms and is greater than the time required for the second capacitor C2 to discharge to the first threshold voltage. In this embodiment, the voltage drop from 4V to 1V on the second capacitor C2 means to pull the potential of the system terminal VM to 3V (negative relative to the battery 110), so that the voltage across the second capacitor C2 is 1V (the voltage difference between the power supply terminal VDD and the system terminal VM).

In this embodiment, after the wireless headset is placed in the charging bin, the first power supply contact GCD1 and the first ground contact DCD1 of the wireless headset are electrically connected to the second power supply contact GCD2 and the second ground contact DCD2 of the charging bin, the reset end is electrically connected to the first power supply contact GCD1, the charging bin sends a reset signal to the battery protection module 130 of the wireless headset through the second power supply contact GCD2 and the first power supply contact GCD1, after the battery protection module 130 receives the reset signal, the logic control unit 160 controls the first switch unit 140 to turn off, and the logic control unit 160 controls the first discharge switch unit Ms1 and the second discharge switch unit Ms2 to turn on and conduct, and the logic control unit 160 starts to time, when the logic control unit 160 times to reach the first preset time period, the logic control unit 160 controls the first switch unit 140 to turn on, and the logic control unit 160 controls the first discharge switch unit Ms1 and the second discharge switch unit Ms2 to turn off. Thereafter, the charging chamber can charge the wireless headset, and the like. In this embodiment, as long as wireless earphone is put into the storehouse of charging to the storehouse of charging, the storehouse of charging will export reset signal and give wireless earphone's battery protection module 130, wireless earphone can reset rapidly and restart, be provided with like this and do benefit to wireless earphone and break down or when dying automatically recovery normal, do not need user's manual operation to reset and restart, very big promotion user's experience, as long as the wireless earphone that the user took out from the storehouse of charging is exactly the wireless earphone after resetting rapidly, exactly be the wireless earphone that can use, the condition that the wireless earphone that the user took out from the storehouse of charging can not appear, user's experience has been promoted. In addition, in other embodiments of this application, can also be equipped with the reset key on the storehouse of charging, when the user triggered the reset key, the storehouse of charging sent reset signal to wireless earphone this moment. In addition, in other embodiments of the present application, the reset signal may not be output through the charging chamber, and may also be sent through the system circuit 150, for example, a reset key is provided on the wireless headset itself, and when the user triggers the reset key, the system circuit 150 sends the reset signal to the battery protection module 130. In addition, in other embodiments of the present application, the wireless headset may further have a separate first communication contact TCD1, and the first communication contact TCD1 is electrically connected to the reset terminal.

Generally speaking, the time interval from the time when the user puts the wireless headset into the charging chamber to the time when the wireless headset is taken out of the charging chamber for use generally needs 1s, and needs 500ms at least, the time needed for the voltage of the second capacitor C2 of the present application to fall below the first threshold voltage is generally less than 1s, and the first preset time period may be set to be less than or equal to 1s, which is set to be enough for the system circuit 150 to realize reset, so that the normal use of the user is not affected, and the preferred first preset time period is set to be less than or equal to 500 ms. In addition, in other embodiments of the present application, the battery protection module 130 may further not provide the second discharging branch, or even if the second discharging branch is provided, the second discharging branch does not function when resetting, for example, the second discharging switch unit Ms2 remains turned off and turned off for the first preset time period, and the first discharging switch unit Ms1 is turned on and turned on for the first preset time period.

The inventors have further found that, when the logic control unit 160 controls the first switch unit 140 to turn off, and the logic control unit 160 controls the first discharge switch unit Ms1 and the second discharge switch unit Ms2 to turn on, and the voltage across the second capacitor C2 assumes 4V, at this time, even if the battery 110 no longer supplies power to the system circuit 150, the second capacitor C2 can also supply power to the system circuit 150, at this time, the second resistor R2 is very small compared with the first discharge resistor Rs1, the second capacitor C2 quickly discharges through the second resistor R2 to the second threshold voltage, the second threshold voltage is, for example, 2.5V-3.0V, for example, the second threshold voltage is 2.5V, 2.6V, 2.7V, 2.8V, 2.9V, 3V, etc., here, 2.7V is taken as an example, and the main discharge circuit includes the positive electrode of the second capacitor C2, the second resistor R2, and the negative electrode of the second capacitor C2. The fast rate is typically in the order of milliseconds or microseconds, and the discharge time of the later discharge branch is negligible. When the voltage is discharged to the second threshold voltage, the resistance of the second resistor R2 is much greater than the resistance of the first discharge resistor Rs1, generally, the resistance of the second resistor R2 is more than several hundred M Ω, at this time, the second capacitor C2 is mainly discharged through the battery protection module 130, and through calculation, the time required for the second capacitor C2 to drop from the second threshold voltage to the threshold voltage is about 54ms (taking the second threshold voltage as 2.7V and the first threshold voltage as 1V as an example), so that the total discharge time does not exceed 60ms, and the first preset time period can be further reduced to 60ms at minimum.

In this embodiment, the battery protection module 130 controls the first discharge switch unit Ms1 to turn on only after receiving the reset signal, and the first discharge switch unit Ms1 turns off at other times. In this embodiment, the second discharging branch is an existing branch in the existing battery protection module 130, and is not described herein again. In this embodiment, the second discharging branch is reserved mainly for common use with the old battery protection module 130, and only the first discharging branch needs to be added to the old battery protection module 130, which is beneficial to reducing the cost.

Referring to fig. 4 and fig. 5 in combination, in the present embodiment, the logic control unit 160 further includes an over-discharge voltage control unit 161, a discharge over-current control unit 164, a reset detection control unit 169, a first logic gate 162, a second logic gate 165, and an inverter 163. The overdischarge voltage control unit 161 is electrically connected to the overdischarge voltage protection unit 131, the discharge overcurrent control unit 164 is electrically connected to the discharge overcurrent protection unit 134, the discharge overcurrent protection unit 134 is electrically connected to the system terminal VM, the reset detection control unit 169 is electrically connected to the reset terminal RST, the first logic gate 162 is electrically connected to the overdischarge voltage control unit 161, the discharge overcurrent control unit 164 and the reset detection control unit 169, respectively, the output terminal of the first logic gate 162 is electrically connected to the input terminal of the inverter 163, the output terminal of the inverter 163 is electrically connected to the control terminal of the discharge switch subunit 140d of the first switch unit 140 or the control terminal of the switch tube, the number of the inverters 163 may be one or more, the second logic gate 165 is electrically connected to the overdischarge voltage control unit 161 and the reset detection control unit 169, respectively, and the output terminal of the second logic gate 165 is electrically connected to the first discharge switch unit Ms1, The control terminal of the second discharge switching cell Ms2 is electrically connected. In this embodiment, the discharge switch subunit 140d or the switch tube is an NMOS tube, the first logic gate 162 is an nand gate, the second logic gate 165 is an and gate, and both the first discharge switch unit Ms1 and the second discharge switch unit Ms2 are PMOS tubes. During normal operation, the overdischarge voltage control unit 161, the discharge overcurrent control unit 164, and the reset detection control unit 169 all output first signals to the first logic gate 162, and then the inverter 163 outputs conducting signals to the first switch unit 140, so that the first switch unit 140 is turned on, and the battery 110 can normally supply power to the system circuit 150; moreover, the over-discharge voltage control unit 161 and the reset detection control unit 169 both output the first signal to the second logic gate 165, and the second logic gate 165 outputs the turn-off signal to the first discharge switch unit Ms1 and the second discharge switch unit Ms2, at this time, the first discharge switch unit Ms1 and the second discharge switch unit Ms2 are turned off; when the reset detection control unit 169 receives the reset signal, the reset detection control unit 169 outputs a second signal to the first logic gate 162 and the second logic gate 165 respectively, the inverter 163 outputs a turn-off signal to the first switch unit 140, the first switch unit 140 is turned off and off, the battery 110 does not supply power to the system circuit 150, meanwhile, the second logic gate 165 outputs a turn-on signal to the first discharge switch unit Ms1 and the second discharge switch unit Ms2, and the first discharge switch unit Ms1 and the second discharge switch unit Ms2 are turned on and off. Moreover, the reset detection control unit 169 further comprises a timer, when the reset detection control unit 169 outputs the second signal, the timer starts to count time, when the timer counts a first preset time period, the reset detection control unit 169 outputs the first signal, at this time, the first logic gate 162 controls the discharge switch to be turned on, and the system circuit 150 realizes reset and restart. In addition, in other embodiments of the present application, the second logic gate 165 may not be included, and in this case, the over-discharge voltage control unit 161 is electrically connected to the control terminal of the second discharge switch unit Ms2, the reset detection control unit 169 is not electrically connected to the control terminal of the second discharge switch unit Ms2, and the reset detection control unit 169 is electrically connected to the control terminal of the first discharge switch unit Ms1 (see fig. 9). In this embodiment, the first signal is a high level signal, and the second signal is, for example, a low level signal. However, the present application is not limited thereto, and in other embodiments of the present application, the first signal may also be a low level signal, and the second signal may be a high level signal.

The inventor of the present application further finds that, after the reset detection control unit 169 receives the reset signal, the first discharge switch unit Ms1 and the second discharge switch unit Ms2 are turned on, which may cause the potential of the system terminal VM to be pulled high, for example, to 3V, during the process of the potential of the system terminal VM rising, the discharge overcurrent protection unit 134 may play a protection role, that is, the discharge overcurrent protection function may work, and output an overcurrent protection signal to the discharge overcurrent control unit 164, the discharge overcurrent protection unit 134 may lock to output an overcurrent signal to the first logic gate 162, and then the inverter 163 outputs a turn-off signal to the first switch unit 140, and the first switch unit 140 may be turned off continuously, and thereafter, even when the timer counts a first preset time period, the reset detection control unit 169 outputs a first signal, however, due to the function of the discharge overcurrent control unit 164, the first switch unit 140 still remains turned off, conduction will not be turned on, resulting in the system circuit 150 failing to implement reset restart.

In order to solve the above problem, in the present embodiment, the reset detection control unit 169 is further electrically connected to the enable terminal of the discharge overcurrent control unit 164, when the reset detection control unit 169 outputs the second signal to the first logic gate 162 and the second logic gate 165 respectively, the reset detection control unit 169 further outputs an enable signal to the discharge overcurrent control unit 164, the discharge overcurrent control unit 164 stops the discharge overcurrent protection function of the discharge overcurrent control unit 164 after receiving the enable signal, even if the discharging overcurrent protection unit 134 outputs the overcurrent protection signal to the discharging overcurrent control unit 164 thereafter, the discharging overcurrent control unit 164 does not operate, that is, does not control the first switching unit 140 to be continuously turned off, so that the first switching unit 140 is not locked to be turned off, in the present embodiment, the reset detection control unit 169 continuously outputs the enable signal to the discharge overcurrent control unit 164 for the first preset time period. In this embodiment, the enable signal is the same as the second signal, and is a low level signal that lasts for a first preset time period. However, the present application is not limited thereto, and in other embodiments of the present application, the enable signal may also be a high-level signal lasting for a first preset time period, and a person skilled in the art may set the enable signal according to actual needs. In addition, in other embodiments of the present application, the enable signal is not limited to be output to the discharging overcurrent control unit 164, and the enable signal may also be output to an enable terminal of the discharging overcurrent protection unit 134, that is, the reset detection control unit 169 is electrically connected to the enable terminal of the discharging overcurrent protection unit 134, so that the discharging overcurrent protection unit 134 does not operate after receiving the enable signal, and even if the potential of the system terminal VM rises to 3V, the discharging overcurrent protection unit 134 does not output the overcurrent protection signal to the discharging overcurrent control unit 164, and the discharging overcurrent control unit 164 does not control to lock the first switch unit 140 to be kept off, that is, the discharging overcurrent protection function stops operating.

In this embodiment, when the timer counts a first preset time period, the reset detection control unit 169 further outputs a disable signal to the discharging overcurrent control unit 164, and then the discharging overcurrent control unit 164 resumes operation. In this embodiment, the release enable signal is the same as the first signal. In other embodiments of the present application, when the enable signal is output to the discharging overcurrent protection unit 134, the disable signal is also output to the discharging overcurrent protection unit 134. In the present embodiment, the release enable signal and the first signal are transmitted simultaneously. However, the present application is not limited to this, in other embodiments of the present application, after the reset detection control unit 169 outputs the first signal, the timing unit further counts a delay time and then outputs a disable signal to the discharging overcurrent control unit 164 or the discharging overcurrent protection unit 134, where the delay time is used to enable the voltage of the system terminal VM to be pulled down to the voltage of the negative electrode of the battery 110 or pulled up to the voltage of the positive electrode of the battery 110 after the first switch unit 140 is turned on, so as to prevent the system terminal VM from being pulled down below the discharging overcurrent reference voltage or pulled up above the discharging overcurrent reference voltage relatively slowly to trigger the discharging overcurrent protection again, which causes the first switch unit 140 to be turned off again.

In addition, in other embodiments of the present application, the electronic device may not be used with the storage device, in which case the electronic device may be used alone.

Third embodiment

Referring to fig. 6, fig. 6 is a circuit block diagram of an electronic component according to a third embodiment of the present application, and this embodiment is similar to the second embodiment, so that the undescribed parts of this embodiment can refer to the second embodiment, and the main difference between this embodiment and the second embodiment is that the first switch unit 340 is disposed above.

Referring to fig. 6 and fig. 8, in the present embodiment, the first switch unit 340 is disposed on the upper portion and the first switch unit 340 is disposed on the outer portion. The battery protection module 330 includes a first discharging branch and a second discharging branch, wherein a first end of the first discharging branch and a first end of the second discharging branch are both electrically connected to the power ground GND, a second end of the first discharging branch and a second end of the second discharging branch are both electrically connected to the system terminal VM, that is, the first discharging branch and the second discharging branch are connected in parallel. In this embodiment, the first discharge branch includes a first discharge switch unit Ms1 and a first discharge resistor Rs1, one end of the first discharge switch unit Ms1 is electrically connected to the power ground GND, the other end of the first discharge switch unit Ms1 is electrically connected to one end of the first discharge resistor Rs1, the other end of the first discharge resistor Rs1 is electrically connected to the system terminal VM, the control terminal of the first discharge switch unit Ms1 is electrically connected to the logic control unit 160, and the logic control unit 160 can control the first discharge switch unit Ms1 to be turned on or turned off. In addition, in other embodiments of the present application, the positions of the first discharge switch unit Ms1 and the first discharge resistor Rs1 may be exchanged. In this embodiment, the second discharge branch includes a second discharge switch unit Ms2 and a second discharge resistor Rs2, one end of the second discharge switch unit Ms2 is electrically connected to the power ground GND, the other end of the second discharge switch unit Ms2 is electrically connected to one end of the second discharge resistor Rs2, the other end of the second discharge resistor Rs2 is electrically connected to the system terminal VM, the control terminal of the second discharge switch unit Ms2 is electrically connected to the logic control unit 160, and the logic control unit 160 can control the second discharge switch unit Ms2 to be turned on or turned off. In addition, in other embodiments of the present application, the positions of the second discharge switch unit Ms2 and the second discharge resistor Rs2 may be exchanged. In addition, in other embodiments of the present application, please refer to fig. 7 and fig. 8 in combination, the first switch unit 340 is disposed on the upper portion, and the first switch unit 340 is disposed inside.

In the embodiment, the resistance range of the first discharging resistor Rs1 is 100 Ω -20k Ω (kilo ohm), preferably 1k Ω -10k Ω, so that the discharging current of the second capacitor C2 is not too large when the second capacitor is discharged through the first discharging resistor Rs1, and the heat generated by the battery protection module 330 is not too large, which is beneficial to protecting the battery protection module 330; the resistance value of the second discharge resistor Rs2 ranges from 100k Ω or more. In the present embodiment, the first discharge switch unit Ms1 is a MOS transistor, preferably an NMOS transistor, but may also be a PMOS transistor

A tube. In the present embodiment, the second discharge switch unit Ms2 is a MOS transistor, preferably an NMOS transistor, but may also be a PMOS transistor. In the present embodiment, the voltage drop from 4V to 1V on the second capacitor C2 means that the potential of the system terminal VM is pulled down to 1V (negative relative to the battery 110), so that the voltage across the second capacitor C2 is 1V (voltage difference between the system terminal VM and the power ground GND).

In this embodiment, after the battery protection module 330 receives the reset signal, the logic control unit 160 controls the first switch unit 340 to turn off, that is, controls the battery 110 to stop supplying power to the system circuit 150, and the logic control unit 160 controls the first discharge switch unit Ms1 to turn on, and at this time, the second discharge switch unit Ms2 does not turn on. Of course, in other embodiments of the present application, the logic control unit 160 may control both the first and second discharge switch units Ms1 and Ms2 to be turned on. When the first discharging switch unit Ms1 is turned on, the second capacitor C2 discharges, the voltage of the system terminal VM decreases with the discharge of the second capacitor C2, when the voltage of the system terminal VM decreases below the first threshold voltage, the voltage on the first capacitor C1 is smaller than the first threshold voltage, and then the system circuit 150 can realize reset and restart after the first switch unit 340 is turned on. In this embodiment, after the logic control unit 160 controls the first switch unit 340 to turn off for the first preset time period, the logic control unit 160 controls the first switch unit 340 to resume turning on, and controls the first discharge switch unit Ms1 to turn off. In this embodiment, the first predetermined time period is less than or equal to 1s, preferably less than or equal to 500 ms.

Referring to fig. 8 and 9 in combination, in the present embodiment, the logic control unit 160 further includes an over-discharge voltage control unit 161, a discharge over-current control unit 164, a reset detection control unit 169, a first logic gate 162, and an inverter 163. The overdischarge voltage control unit 161 is electrically connected to the overdischarge voltage protection unit 131, the discharge overcurrent control unit 164 is electrically connected to the discharge overcurrent protection unit 134, the discharge overcurrent protection unit 134 is electrically connected to the system terminal VM, the reset detection control unit 169 is electrically connected to the reset terminal RST, the first logic gate 162 is electrically connected to the overdischarge voltage control unit 161, the discharge overcurrent control unit 164, and the reset detection control unit 169, respectively, an output terminal of the first logic gate 162 is electrically connected to an input terminal of the inverter 163, an output terminal of the inverter 163 is electrically connected to a control terminal of the discharge switch subunit 140d of the first switch unit 340 or a control terminal of the switch tube, an output terminal of the overdischarge voltage control unit 161 is electrically connected to a control terminal of the second discharge switch unit Ms2, and the reset detection control unit 169 is electrically connected to a control terminal of the first discharge switch unit Ms 1. In this embodiment, the reset detection control unit 169 is further electrically connected to the enable terminal of the discharge overcurrent control unit 164, and the reset detection control unit 169 outputs an enable signal or a disable signal to the enable terminal of the discharge overcurrent control unit 164, so as to control whether the discharge overcurrent protection function operates normally. In other embodiments of the present application, the reset detection control unit 169 is electrically connected to the enable terminal of the discharge overcurrent protection unit 134, and the reset detection control unit 169 outputs an enable signal or a disable signal to the enable terminal of the discharge overcurrent protection unit 134.

Fourth embodiment

Referring to fig. 10, fig. 10 is a block diagram of a battery protection circuit 120 according to a fourth embodiment of the present application, and this embodiment is similar to the second embodiment and the third embodiment, so that the undescribed parts of this embodiment can refer to the second embodiment and the third embodiment, and the main difference between this embodiment and the second embodiment is that the second discharge switch unit Ms2 is not provided, which is beneficial to saving cost.

Referring to fig. 10, in the present embodiment, the battery protection module 130 includes a first discharging branch, wherein a first end of the first discharging branch is electrically connected to the power supply terminal VDD or the power ground terminal GND, and a second end of the first discharging branch is electrically connected to the system terminal VM. In this embodiment, the first discharging branch includes a first discharging switch unit Ms1, a first discharging resistor Rs1, and a second discharging resistor Rs2, wherein one end of the first discharging switch unit Ms1 is electrically connected to the power supply terminal VDD or the power ground terminal GND, the other end of the first discharging switch unit Ms1 is electrically connected to one end of the first discharging resistor Rs1 and one end of the second discharging resistor Rs2, the other end of the first discharging resistor Rs1 and the other end of the second discharging resistor Rs2 are electrically connected to the system terminal VM, that is, the first discharging resistor Rs1 and the second discharging resistor Rs2 are connected in parallel, a control terminal of the first discharging switch unit Ms1 is electrically connected to the logic control unit 160, and the logic control unit 160 can control the first discharging switch unit Ms1 to be turned on or off, and particularly electrically connected to an output terminal of the second logic unit. In addition, in other embodiments of the present application, the positions of the parallel circuit of the first discharge switch unit Ms1, the first discharge resistor Rs1 and the second discharge resistor Rs2 may also be exchanged. In the present embodiment, the resistance of the first discharge resistor Rs1 ranges from 1k Ω to 10k Ω, preferably from 3k Ω to 7k Ω, so that the discharge current of the second capacitor C2 is not too large when the second capacitor is discharged through the first discharge resistor Rs1, and the heat generated by the battery protection module 130 is not too large, which is beneficial to protecting the battery protection module 130; the resistance range of the second discharge resistor Rs2 is greater than or equal to 100k omega. In the present embodiment, the first discharge switch unit Ms1 is a MOS transistor, preferably a PMOS transistor, but may also be an NMOS transistor.

In the embodiment, the first discharge resistor Rs1 and the second discharge resistor Rs2 are arranged in parallel, so that a discharge switch unit does not need to be additionally arranged, and the cost can be reduced. In addition, in other embodiments of the present application, the second discharge resistor Rs2 may not be provided.

Fifth embodiment

Referring to fig. 11, fig. 11 is a block diagram of an electronic component according to a fifth embodiment of the present application, which is similar to the first to fourth embodiments, so that the undescribed parts of the present embodiment can refer to the first to fourth embodiments, and the main difference between the present embodiment and the previous embodiments is to prevent the signal misjudgment of the battery protection module 630.

Referring to fig. 11, in the present embodiment, the first switch unit 140 is disposed below and outside. Of course, the present application is not limited thereto, and the first switch unit 140 may be disposed below and built therein. In the present embodiment, the number of the first contacts is three, and certainly, the number of the first contacts may also be more, where the three first contacts are the first power supply contact GCD1, the first ground contact DCD1, and the first communication contact TCD 1; the number of the second contacts corresponds to the number of the first contacts, namely three, the plurality of second contacts comprise a second power supply contact GCD2, a second grounding contact DCD2 and a second communication contact TCD2, when the wireless headset is placed in the charging bin, the first power supply contact GCD1 is in contact type electrical connection with the second power supply contact GCD2, the first grounding contact DCD1 is in contact type electrical connection with the second grounding contact DCD2, and the first communication contact TCD1 is in contact type electrical connection with the second communication contact TCD 2. In this embodiment, the first power supply contact GCD1 and the second power supply contact GCD2 may be used to charge the battery 110, the first power supply contact GCD1 is electrically connected to the charge management circuit 170, the charge management circuit is further electrically connected to the positive electrode of the battery 110, the first ground contact DCD1 is electrically connected to the system terminal VM and the second terminal of the first switch unit 140, the system circuit 150 is electrically connected to the second terminal of the first switch unit 140, and the first communication contact TCD1 and the second communication contact TCD2 are used to communicate the charging chamber with the system circuit 150 and the battery protection module 630. In this embodiment, the first communication contact TCD1 is electrically connected to the battery protection module 630 and the system circuit 150. In addition, in other embodiments of the present application, please refer to fig. 2, the number of the first contact and the number of the second contact may also be two, in which case, the first power supply contact GCD1 and the second power supply contact GCD2 may be used for charging the battery 110 and may also be used for communication, and in which case, the first power supply contact GCD1 is further electrically connected to the battery protection module 630 and the system circuit 150, respectively.

Generally, the charging bin communicates with the system circuit 150 frequently, the charging bin communicates with the battery protection module 630 infrequently, the charging bin can send shipping signals, reset signals and the like to the battery protection module 630, and the embodiment takes the charging bin sending the reset signal to the battery protection module 630 as an example for description. In this embodiment, the communication signal output by the charging bin to the system circuit 150 is a first pulse signal, and the communication signal output by the charging bin to the battery protection circuit 120 is a second pulse signal, that is, the reset signal is composed of the second pulse signal. The voltage corresponding to the logic high level of the first pulse signal is lower than the voltage corresponding to the logic high level of the second pulse signal, for example, the voltage corresponding to the logic high level of the first pulse signal is 2V-3.5V, for example, 2V, 2.2V, 2.4V, 2.5V, 2.6V, 2.8V, 4V, 3.2V, 3.4V, 3.5V, etc., and 2.5V is described below as an example, and the voltage corresponding to the logic high level of the second pulse signal is 4V-6V, for example, 4V, 4.5V, 5V, 5.5V, 6V, etc., and 5V is described below as an example. When the charging bin outputs the first pulse signal through the second communication contact TCD2 and the first communication contact TCD1, the battery protection circuit 120 recognizes that the first pulse signal is a continuous low level signal, that is, regardless of the logic high level or the logic low level of the first pulse signal, the battery protection module 630 recognizes that the first pulse signal is a logic low level, for example, the battery protection module 630 recognizes voltages less than 3.5V as logic low levels, the battery protection module 630 recognizes voltages greater than or equal to 4V as logic high levels, and the continuous low level signal battery protection module 630 recognizes that the first pulse signal is an invalid signal and does not operate.

In order for the battery protection module 630 to recognize that the first pulse signal is a continuous logic low signal, please refer to fig. 11 and 12 in combination, in this embodiment, the battery protection module 630 includes a communication terminal, which is a reset terminal RST here, for receiving the reset signal. In addition, in other embodiments of the present application, the communication terminal may also be a shipping terminal for receiving a shipping signal, and the logic control unit 660 controls the first switching unit 140 to remain closed when receiving the shipping signal. In this embodiment, the wireless headset further includes a first voltage-dividing resistor Rt1, the communication terminal is electrically connected to one terminal of the first voltage-dividing resistor Rt1, the other terminal of the first voltage-dividing resistor Rt1 is electrically connected to the first communication contact TCD1, and the first communication contact TCD1 is electrically connected to the system circuit 150 directly, that is, the first communication contact TCD1 is connected to the system circuit 150 without passing through the first voltage-dividing resistor Rt 1.

In the present embodiment, the logic control unit 660 includes a second voltage dividing resistance Rt2 and a signal sampling unit 671. The communication terminal is further electrically connected to one end of a second voltage-dividing resistor Rt2, the other end of the second voltage-dividing resistor Rt2 is electrically connected to the system terminal VM, the signal sampling unit 671 is electrically connected to the communication terminal, the signal sampling unit 671 determines that the voltage of the communication terminal is higher than the third threshold voltage and is at a logic high level, and the voltage of the communication terminal is lower than the third threshold voltage and is at a logic low level, for example, the range of the third threshold voltage is 0.5V-1.8V, for example, 0.5V, 0.8V, 1V, 1.2V, 1.4V, 1.5V, 1.6V, 1.8V, and the like, and the embodiment takes the third threshold voltage as 1.2V as an example for explanation. In this embodiment, after the voltage corresponding to the logic high level of the first pulse signal is divided by the first voltage dividing resistor Rt1 and the second voltage dividing resistor Rt2, the voltage of the communication terminal is less than the third threshold voltage, and after the voltage corresponding to the logic high level of the second pulse signal is divided by the first voltage dividing resistor Rt1 and the second voltage dividing resistor Rt2, the voltage of the communication terminal is greater than the third threshold voltage, that is, when the first communication contact TCD1 receives the first pulse signal, the voltage corresponding to the logic high level of the first pulse signal is assumed to be U1, and then the voltage of the communication terminal is about: u1 × Rt2/(Rt1+ Rt2), where Rt1 represents the resistance of the first voltage dividing resistor Rt1, Rt2 represents the resistance of the second voltage dividing resistor Rt2, and the voltage at the communication end is smaller than the third threshold voltage, for example, smaller than 1.2V, so that the signal sampling unit 671 determines the first pulse signal as a low level signal as a whole, and determines the first pulse signal as an invalid signal, for example, a low level signal through comparison by an overvoltage comparator; when the first communication contact TCD1 receives the second pulse signal, the voltage corresponding to the logic high level of the second pulse signal is assumed to be U2, and the voltage of the communication terminal is: u2 × Rt2/(Rt1+ Rt2), when the voltage at the communication terminal is greater than the third threshold voltage, for example, greater than 1.2V, the signal sampling unit 671 determines the logic high level of the second pulse signal as a high level, determines the logic low level of the second pulse signal as a low level, and the signal sampling unit 671 can identify the pulse signal. Therefore, the signal sampling unit 671 of the battery protection module 630 cannot recognize the first pulse signal and can recognize the second pulse signal, and when the first communication contact TCD1 receives the first pulse signal for a long time, the signal sampling unit 671 cannot recognize the signal, so that the battery protection module 630 does not malfunction. In addition, since the signals sent by the charging bin to the battery protection module 630 are relatively few, the possibility that the system circuit 150 is triggered by mistake is low, and the signals sent by the charging bin to the battery protection module 630 also include a reset signal and a shipping signal, when the system circuit 150 is operated by mistake when receiving the signals, the battery protection module 630 controls the first switch unit 140 to be switched off, and then the system circuit 150 is powered off, so that the influence on the system circuit 150 is small.

In this embodiment, the resistances of the first and second dividing resistors Rt1, Rt2 are in the order of mega ohm, such as greater than or equal to 1M Ω (mega ohm), such as 1M Ω, 5M Ω, 10M Ω, 20M Ω, 30M Ω, 50M Ω, etc., so that the power consumption of the first and second dividing resistors Rt1, Rt2 is low. In the embodiment, the ratio of the first voltage-dividing resistance Rt1 to the second voltage-dividing resistance Rt2 is in the range of 1:1 to 5:1, for example, 1:1, 2:1, 3:1, 4:1, 5:1, etc.

In addition, in other embodiments of the present application, referring to fig. 13, the logic control unit 660 includes a first voltage-dividing resistor Rt1 and a second voltage-dividing resistor Rt2, that is, the first voltage-dividing resistor Rt1 is built in the battery protection module 630, so that no additional resistor needs to be arranged between the communication terminal of the battery protection module 630 and the first communication contact TCD1, which is beneficial to reducing peripheral components. At this time, the signal sampling unit 671 is electrically connected to a connection of the first voltage-dividing resistor Rt1 and the second voltage-dividing resistor Rt 2.

In this embodiment, the system circuit 150 and the battery protection module 630 determine whether a voltage belongs to a logic high level or a logic low level, that is, both the system circuit and the battery protection module are determined by the third threshold voltage, which is beneficial to unify design standards and reduce complexity of circuit design, so that the first voltage dividing resistor Rt1 and the second voltage dividing resistor Rt2 connected in series need to be designed for voltage division in this embodiment. However, the present application is not limited thereto, and in other embodiments of the present application, the battery protection module 630 determines whether the received voltage is a logic high level or a logic low level by a third threshold voltage, and the system circuit 150 determines whether the received voltage is a logic high level or a logic low level by a fourth threshold voltage, for example, both by a voltage comparator, wherein the third threshold voltage is greater than the fourth threshold voltage, for example, the third threshold voltage ranges from greater than an upper limit of a voltage corresponding to the logic high level of the first pulse signal (the high level voltage may fluctuate), and is less than a lower limit of a voltage corresponding to the logic high level of the second pulse signal (the high level voltage may fluctuate), for example, the third threshold voltage ranges from greater than 3.5V to less than 4V, for example, 3.7V, the fourth threshold voltage ranges from less than a voltage corresponding to the logic high level of the first pulse signal, for example, the fourth threshold voltage is in the range of 0.5V to 1.8V, for example, 1.2V, and thus, by setting this, the setting of the first dividing resistance Rt1 is not required, and the voltage received by the signal sampling unit 671 is smaller than the third threshold voltage regardless of whether the first pulse signal is at a logic high level or a logic low level, and is determined as a logic low level by the signal sampling unit 671 and is an invalid signal.

In the present embodiment, the system circuit 150 and the battery protection module 630 are approximately the same with reference ground, and are both the negative pole of the battery 110 or the power ground GND (the voltage of the first switch unit 140 is small and negligible when it is turned on), and when the first switch unit 140 is turned on, the voltage of the negative pole of the battery 110 is approximately equal to the voltage of the second end of the first switch unit 140.

Sixth embodiment

Referring to fig. 14, fig. 14 is a block diagram of a battery protection circuit 120 according to a sixth embodiment of the present application, and this embodiment is similar to the fifth embodiment, so that the undescribed portion of this embodiment can refer to the fifth embodiment, and the main difference between this embodiment and the fifth embodiment is that the first switch unit 140 is disposed on top.

Referring to fig. 6 and fig. 14, in the present embodiment, the first switch unit 140 is disposed on and outside. Of course, the present application is not limited thereto, and the first switch unit 140 may be disposed and built in. In the present embodiment, the number of the first contacts is two, but may also be more, and the two first contacts are the first power supply contact GCD1 and the first ground contact DCD 1; the number of the second contacts corresponds to the number of the first contacts, and is also two, the plurality of second contacts include a second power supply contact GCD2 and a second ground contact DCD2, when the wireless headset is placed in the charging bin, the first power supply contact GCD1 is electrically connected with the second power supply contact GCD2 in a contact manner, and the first ground contact DCD1 is electrically connected with the second ground contact DCD2 in a contact manner. In this embodiment, the first power supply contact GCD1 and the second power supply contact GCD2 may be used for charging the battery 110 and also for communication between the charging bin and the system circuit 150 and the battery protection module 130, that is, the first power supply contact GCD1 and the second power supply contact GCD2 also have functions of communication contacts, that is, the first power supply contact GCD1 has functions of a first communication contact, and the second power supply contact GCD2 has functions of a second communication contact. In this embodiment, the first power supply contact GCD1 is electrically connected to the battery protection module 130, the system circuit 150 and the charge management circuit, respectively, the first ground contact DCD1 is electrically connected to the power ground GND of the battery protection module 130, and the system circuit 150 is also electrically connected to the power ground GND. In addition, in other embodiments of the present application, please refer to fig. 11, the number of the first contact and the number of the second contact may also be three, and in this case, the first communication contact TCD1 and the second communication contact TCD2 are also included separately, and the first communication contact TCD1 and the second communication contact TCD2 are used for communication.

In the present embodiment, the battery protection module 130 includes a communication terminal, which is a reset terminal RST for receiving a reset signal, but may also be a shipping terminal, and the communication terminal is electrically connected to the first power supply contact GCD 1. In this embodiment, the logic control unit 760 includes a first voltage-dividing resistor Rt1, a second voltage-dividing resistor Rt2, and a signal sampling unit 771, where one end of the first voltage-dividing resistor Rt1 is electrically connected to the communication terminal, the other end of the first voltage-dividing resistor Rt1 is electrically connected to one end of the second voltage-dividing resistor Rt2, the other end of the second voltage-dividing resistor Rt2 is electrically connected to the power ground GND, the signal sampling unit 771 is electrically connected to the connection between the first voltage-dividing resistor Rt1 and the second voltage-dividing resistor Rt2, and the signal sampling unit 771 determines that the voltage at the connection is higher than the third threshold voltage and is lower than the third threshold voltage, for example, the range of the third threshold voltage is 0.5V-1.8V, and the present embodiment is described by taking the third threshold voltage as 1.2V as an example. In this embodiment, the voltage at the connection position of the voltage corresponding to the logic high level of the first pulse signal after being divided by the first voltage dividing resistor Rt1 and the second voltage dividing resistor Rt2 is smaller than the third threshold voltage, and the voltage at the connection position of the voltage corresponding to the logic high level of the second pulse signal after being divided by the first voltage dividing resistor Rt1 and the second voltage dividing resistor Rt2 is larger than the third threshold voltage, that is, when the first power supply contact GCD1 receives the first pulse signal, the signal sampling unit 771 may determine the entire first pulse signal as a logic low level signal, which is an invalid signal; when the first power supply contact GCD1 receives the second pulse signal, the signal sampling unit 771 determines the voltage corresponding to the logic high level of the second pulse signal as the logic high level, determines the voltage corresponding to the logic low level of the second pulse signal as the logic low level, and the signal sampling unit 771 can recognize the pulse signal. Therefore, the signal sampling unit 771 of the battery protection module 130 cannot recognize the first pulse signal and can recognize the second pulse signal, and when the first power supply contact GCD1 receives the first pulse signal for a long time, the signal sampling unit 771 cannot recognize the first pulse signal, so that the battery protection module 130 does not malfunction. In other embodiments of the present application, as in the fifth embodiment, the first voltage-dividing resistor Rt1 may be externally disposed, in which case one end of the first voltage-dividing resistor Rt1 is electrically connected to the first power supply terminal, the other end of the first voltage-dividing resistor Rt1 is electrically connected to the communication terminal, the communication terminal is electrically connected to one end of the second voltage-dividing resistor Rt2, the other end of the second voltage-dividing resistor Rt2 is electrically connected to the power ground GND, and the signal sampling unit 771 is electrically connected to the communication terminal.

In this embodiment, the system circuit 150 and the battery protection module 130 determine whether a voltage belongs to a logic high level or a logic low level, that is, the voltage is determined by the third threshold voltage, which is beneficial to unifying design standards and reducing complexity, so that the present embodiment needs to design the first voltage dividing resistor Rt1 and the second voltage dividing resistor Rt2 connected in series for voltage division. However, the present application is not limited thereto, and in other embodiments of the present application, the battery protection module 130 determines whether a voltage is a logic high level or a logic low level by a third threshold voltage, and the system circuit 150 determines whether a voltage is a logic high level or a logic low level by a fourth threshold voltage, wherein the third threshold voltage is greater than the fourth threshold voltage, for example, the third threshold voltage ranges from an upper limit of the voltage corresponding to the logic high level of the first pulse signal to a lower limit of the voltage corresponding to the logic high level of the second pulse signal, for example, the third threshold voltage ranges from greater than 3.5V to less than 4V, for example, 3.7V, the fourth threshold voltage ranges from a lower limit of the voltage corresponding to the logic high level of the first pulse signal to a lower limit of the voltage corresponding to the logic high level of the first pulse signal, for example, the fourth threshold voltage ranges from 0.5V to 1.8V, for example, 1.2V, and thus, by setting as such, the first voltage dividing resistor Rt1 is not required to be set, and the voltage of the first pulse signal, whether at a logic high level or a logic low level, is smaller than the third threshold voltage, and is judged as a low level by the signal sampling unit 771 to be an invalid signal.

In the present embodiment, the system circuit 150 is the same as the ground reference of the battery protection module 130, and is the negative electrode of the battery 110 or the power ground GND.

It should be understood that reference to "a plurality" herein means two or more. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same and similar between the embodiments may be referred to each other. For the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for relevant points.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims

1. A battery protection circuit is characterized by comprising a battery protection module and a first switch unit, wherein the battery protection module comprises a power supply end, a power grounding end, an over-discharge voltage protection unit, a discharge over-current protection unit, a logic control unit and a system end, wherein the power supply end and the power grounding end are correspondingly electrically connected with a positive pole and a negative pole of a battery, the logic control unit is electrically connected with a control end of the first switch unit, a first end of the first switch unit is electrically connected with the battery, and a second end of the first switch unit is electrically connected with the system end;

2. The battery protection circuit according to claim 1, wherein the logic control unit comprises a reset detection control unit and a discharge overcurrent control unit, wherein the discharge overcurrent control unit is electrically connected to the discharge overcurrent protection unit, the discharge overcurrent protection unit is electrically connected to the system terminal, the reset detection control unit is electrically connected to an enable terminal of the discharge overcurrent control unit, when the reset detection control unit receives a reset signal, the reset detection control unit outputs a second signal for controlling the first switch unit to be turned off and controlling the first discharge switch unit to be turned on, and the reset detection control unit further outputs an enable signal to the discharge overcurrent control unit to stop the discharge overcurrent protection function.

3. The battery protection circuit according to claim 1, wherein the logic control unit comprises a reset detection control unit and a discharge overcurrent control unit, wherein the discharge overcurrent control unit is electrically connected to the discharge overcurrent protection unit, the reset detection control unit is electrically connected to an enable terminal of the discharge overcurrent protection unit, when the reset detection control unit receives a reset signal, the reset detection control unit outputs a second signal for controlling the first switch unit to be turned off and controlling the first discharge switch unit to be turned on, and the reset detection control unit further outputs an enable signal to the discharge overcurrent protection unit to stop the discharge overcurrent protection function.

4. The battery protection circuit according to claim 2 or 3, wherein the reset detection control unit comprises a timer, the timer starts to count when the reset detection control unit outputs the second signal, the reset detection control unit outputs the first signal for controlling the first switch unit to be turned on and controlling the first discharging switch unit to be turned off after the timer counts the first preset time period, and the reset detection control unit outputs a release enable signal to the enable terminal to recover the discharging overcurrent protection function thereof.

5. The battery protection circuit according to claim 4, wherein a timing at which the reset detection control unit outputs the release enable signal is subsequent to a timing at which the reset detection control unit outputs the first signal.

6. The battery protection circuit according to any one of claims 1-3, wherein the first discharging branch comprises a first discharging resistor, the first discharging resistor is connected in series with the first discharging switch unit, and the resistance value of the first discharging resistor is in a range of 100 ohms-20 kilo-ohms.

7. The battery protection circuit according to any one of claims 1 to 3, wherein the resistance of the first discharging branch ranges from 1 kilo-ohm to 10 kilo-ohm when the first discharging switch unit is turned on, and the first preset time period is less than or equal to 500 ms.

8. The battery protection circuit according to any one of claims 1 to 3, wherein the battery protection module further comprises a second discharging branch, a first end of the second discharging branch is electrically connected to a power supply terminal or a power ground terminal, a second end of the second discharging branch is electrically connected to a system terminal, the second discharging branch comprises a second discharging switch unit and a second discharging resistor, the second discharging switch unit is connected in series with the second discharging resistor, a control terminal of the second discharging switch unit is electrically connected to the logic control unit, the logic control unit controls the first switch unit to turn off and controls the second discharging switch unit to turn on when the battery protection circuit receives a reset signal, and the logic control unit controls the first switch unit to turn on and controls the second discharging switch unit to turn off after the first switch unit turns off for a first preset time period, the resistance value of the second discharge resistor is greater than or equal to 100 kilo-ohms.

9. The battery protection circuit according to any one of claims 1-3, wherein the battery protection module comprises a reset terminal, the reset terminal is configured to receive the reset signal, and the reset terminal is electrically connected to the logic control unit; or,

10. The battery protection circuit according to any one of claims 1-3, wherein the battery protection module and the first switch unit are located on the same chip, the power supply terminal is a power supply pin, the power ground terminal is a power ground pin, the system terminal is a system pin, the second terminal of the first switch unit is used for electrically connecting to a system circuit via the system pin, and the second terminal of the first discharge branch is used for electrically connecting to the system circuit via the system pin; or,

the first end of the first switch unit is electrically connected with the negative electrode of the battery, the second end of the first switch unit is electrically connected with the system end, the system end is electrically connected with the system circuit, when the first discharge switch unit is switched on, the time required for the voltage between the power supply end and the system end to discharge below a first threshold voltage is less than 1 second, and the range of the first threshold voltage is less than or equal to 1V; or,

the first end of the first switch unit is electrically connected with the positive electrode of the battery, the second end of the first switch unit is electrically connected with the system end, the system end is used for being electrically connected with the system circuit, when the first discharge switch unit is switched on, the time required for discharging the voltage between the system end and the power ground end to be below a first threshold voltage is less than 1 second, and the range of the first threshold voltage is less than or equal to 1V.

11. The battery protection circuit according to any one of claims 1-3, wherein the first switch unit comprises a charging switch subunit and a discharging switch subunit, the charging switch subunit and the discharging switch subunit are connected in series, a control terminal of the charging switch subunit and a control terminal of the discharging switch subunit are respectively electrically connected to the logic control unit, and the logic control unit controls the discharging switch subunit to keep off when the battery protection circuit receives a reset signal; or,

12. A battery assembly, comprising:

a battery;

the battery protection circuit according to any one of claims 1 to 11, wherein a power supply terminal and a power supply ground terminal of the battery protection circuit are electrically connected to a positive electrode and a negative electrode of a battery respectively, and the battery is used for being electrically connected to a system circuit via the first switch unit.

13. An electronic device, characterized by comprising a system circuit, further comprising a battery protection circuit according to any one of claims 1 to 11 or comprising a battery assembly according to claim 12, one end of the system circuit being electrically connected to the second end of the first switching unit, the other end of the system circuit being adapted to be electrically connected to the battery.

14. An electronic assembly comprising a receiving device and an electronic device according to claim 13, the electronic device being receivable in the receiving device, the electronic device further comprising a plurality of first contacts, the receiving device comprising a plurality of second contacts, the second contacts being in contact with the first contacts when the electronic device is received in the receiving device to effect an electrical connection therebetween.

15. The electronic assembly of claim 14, wherein the system circuitry sends a reset signal to the battery protection circuitry; or,

16. The electronic assembly of claim 14, wherein the first contact comprises a first communicative contact, the battery protection module and the system circuitry each being electrically connected to the first communicative contact; the second contact comprises a second communication contact in contacting electrical connection with the first communication contact; the communication signal output by the storage device to the system circuit is a first pulse signal, the communication signal output by the storage device to the battery protection module is a second pulse signal, the voltage corresponding to the logic high level of the first pulse signal is smaller than the voltage corresponding to the logic high level of the second pulse signal, and when the storage device outputs the first pulse signal through the second communication contact and the first communication contact, the battery protection module identifies that the first pulse signal is a continuous logic low level signal.