CN111987772B

CN111987772B - On-chip system, battery pack and electronic device

Info

Publication number: CN111987772B
Application number: CN202010881217.3A
Authority: CN
Inventors: 宋利军; 宋朋亮
Original assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Current assignee: Xi'an Wenxian Semiconductor Technology Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-05-20
Anticipated expiration: 2040-08-27
Also published as: CN111987772A

Abstract

The application provides a system on a chip, comprising: the power supply pin is also used for being electrically connected with a shipping output end of a system circuit, when the power supply pin changes due to the change of a shipping output end signal, the system-on-chip enters a shipping mode, and when the shipping mode is performed, the system-on-chip outputs a control signal for turning off the first switch unit to the control pin so that a battery stops supplying power to the system circuit and at least part of units of the system-on-chip are stopped supplying power, and when the shipping mode is performed, the awakening unit is supplied with power, and the awakening unit is used for enabling the system-on-chip to exit the shipping mode. The application also provides a battery pack and an electronic device. The application has the advantages that: the current consumption of the battery in the transportation and storage processes can be reduced, the electric quantity retention time of the battery is prolonged, and the user experience is improved.

Description

On-chip system, battery pack and electronic device

Technical Field

The application relates to the technical field of batteries, in particular to a system on chip, a battery pack and an electronic device.

Background

The battery assembly is widely applied to electronic devices, such as bluetooth headsets, mobile phones, tablet computers and the like, so as to provide a more flexible use environment for the electronic devices without being limited by the range of sockets and power supply wires. Generally, a battery assembly includes a bare cell, a battery protection circuit electrically connected to the bare cell to prevent the bare cell from being overcharged or overdischarged.

After the electronic device with the battery pack is manufactured in a production place, the electronic device is shut down after the battery pack is charged with preset electric quantity, then the electronic device is transported and stored for a long time, and finally when an end user takes the electronic device for use for the first time, the electronic device is completely discharged due to internal current consumption due to long-time transportation and storage, so that the end user has to charge the electronic device before the end user uses the electronic device for the first time to recover the electric quantity, and the experience of the user is poor.

Disclosure of Invention

An embodiment of the present application provides a system on a chip, a battery pack, and an electronic device. The current consumption of the battery in the transportation and storage processes can be reduced, the electric quantity retention time of the battery is prolonged, and the user experience is improved.

In order to solve the above technical problem, a first aspect of embodiments of the present application provides a system on a chip, including: the power supply circuit comprises a power supply pin, a power grounding pin, an over-discharge voltage protection unit, a control unit, a wake-up unit and a control pin, wherein the power supply pin and the power grounding pin are respectively used for being electrically connected with a battery;

the power supply pin is also used for being electrically connected with a shipping output end of the system circuit, when the voltage signal received by the power supply pin changes due to the change of the shipping output end signal, the system-on-chip enters a shipping mode, when the power supply pin is in the shipping mode, the system-on-chip outputs a control signal for turning off the first switch unit to the control pin so that the battery stops supplying power to the system circuit and at least part of units of the system-on-chip are stopped supplying power, when the power supply pin is in the shipping mode, the awakening unit is supplied with power, and the awakening unit is used for enabling the system-on-chip to exit the shipping mode.

Optionally, the system on chip enters a shipping mode when the number of pulses received by the power pin within a predetermined time period is greater than or equal to a first predetermined number.

Optionally, the system on chip further includes a pulse counting unit, the pulse counting unit is electrically connected to the power supply pin, and when the pulse counting unit determines that the number of pulses received by the power supply pin in a predetermined time period is greater than or equal to a first predetermined number, the system on chip enters a shipping mode.

Optionally, the over-discharge voltage protection unit includes a comparator, the system on chip further includes a third switching unit and a third resistor, the control end of the third switching unit is electrically connected with the output end of the pulse counting unit, the input end of the third switching unit is grounded, the output end of the third switching unit is electrically connected with one end of a third resistor, the other end of the third resistor is connected with a high level, the output end of the third switching unit is also electrically connected with the reverse end of the comparator, when the pulse counting unit confirms that the number of pulses received by the power supply pin in a preset time period is greater than or equal to a first preset number, a control signal is output to enable the third switch unit to be conducted, the output signal of the comparator is changed to control the system on chip to enter a shipping mode, and the units of the system-on-chip except the wake-up unit are powered off in the shipping mode.

Optionally, the system on chip enters the shipping mode when the voltage signal received by the power supply pin is lower than the preset threshold voltage due to voltage division of the branch where the shipping output terminal is located.

Optionally, the over-discharge voltage protection unit is electrically connected to the power supply pin, when a voltage signal of the power supply pin is lower than a threshold voltage, the discharge protection unit controls the system on chip to enter a shipping mode, and in the shipping mode, the first switch unit is turned off and all units of the system on chip except the wake-up unit are powered off.

Optionally, the wake-up unit is a charging detection unit.

Optionally, when the charging detection unit detects a charging signal, the system on chip exits the shipping mode.

Optionally, the system on chip further includes an overcharge voltage protection unit, a discharge overcurrent protection unit, a reference voltage generation unit, and a frequency generation unit, and in the shipping mode, at least one of the overcharge voltage protection unit, the overdischarge voltage protection unit, the discharge overcurrent protection unit, the control unit, the reference voltage generation unit, and the frequency generation unit is powered off.

Optionally, the units of the system on chip except the wake-up unit are powered off in the shipping mode.

Optionally, the first switching unit includes a MOS transistor.

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

a battery;

in the system on chip, the power supply pin and the power ground pin of the system on chip are electrically connected to the battery, respectively.

Optionally, the capacity of the battery is 10mAH-80 mAH.

A third aspect of embodiments of the present application provides an electronic apparatus, including:

the above battery module;

system circuitry, wherein the battery supplies power to the system circuitry via the system-on-chip control.

Optionally, the electronic device is a bluetooth headset.

Optionally, a shipping output end of the system circuit is electrically connected to a power supply pin of the system on chip via a second resistor, and the shipping output end is in a high impedance state at a time other than when outputting a signal for causing the system on chip to enter a shipping mode.

The embodiment of the application has the following beneficial effects: the power supply pin is also used for being electrically connected with a shipping output end of the system circuit, when the voltage signal received by the power supply pin changes due to the change of the shipping output end signal, the system-on-chip enters a shipping mode, when the power supply pin is in the shipping mode, the system-on-chip outputs a control signal for turning off the first switch unit to the control pin so that the battery stops supplying power to the system circuit and at least part of units of the system-on-chip are stopped supplying power, when the power supply pin is in the shipping mode, the awakening unit is supplied with power and used for enabling the system-on-chip to exit the shipping mode. In the shipping mode, the system-on-chip outputs a control signal for turning off the first switch unit to the control pin so that the battery stops supplying power to the system circuit, so that the battery cannot supply power to the system circuit, the electric quantity of the battery can be greatly saved, in the shipping mode, at least part of units of the system-on-chip are stopped supplying power, so that the battery only needs to supply power to a small number of circuit units such as a wake-up circuit of the system-on-chip, the electric quantity consumption of the battery is further reduced, the current consumption of the electronic device can be reduced, the electric quantity keeping time of the battery can be prolonged, after the user takes the electronic device, the user only needs to operate the wake-up unit to enable the system-on-chip to exit the shipping mode, the electronic device can be normally used when being started, and the user experience 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 schematic circuit block diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic circuit block diagram of an electronic device according to another embodiment of the present application;

FIG. 3 is a schematic circuit block diagram of a system on a chip according to an embodiment of the present application;

FIG. 4 is a waveform diagram of the signal received at the ship transport egress of FIG. 3, the signal received at the power pin, and the pulse count unit output signal;

FIG. 5 is a schematic circuit block diagram of an electronic device according to another embodiment of the present application;

FIG. 6 is a schematic diagram of a circuit block of the system on chip of FIG. 5;

FIG. 7 is a circuit block diagram of a system on a chip according to another embodiment of the present application;

FIG. 8 is a specific circuit implementation diagram of the pulse counting unit and the over-discharge voltage protection unit in FIG. 7;

description of the figure numbers:

100. 500-a system on a chip; VDD-Power supply pin; GND-power ground pin; VM — System ground pin; CTR-control pin; 110-an overcharge voltage protection unit; 120-charging overcurrent protection unit; 130-discharge overcurrent protection unit; 140-reference voltage generating unit; 150-a frequency generation unit; 160-a control unit; 170-a wake-up unit; 180-a first switching unit; 190-an over-discharge voltage protection unit; 191-a comparator; 410-a temperature protection unit; 420-a pulse counting unit; 440-a third switching unit; 200-system circuitry; 210-shipping output; 220-a second switching unit; 300-a battery; r1 — first resistance; r2 — second resistance; r3 — third resistance; c-capacitance.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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 the listed 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 embodiment of the application provides an electronic device, and the electronic device is a bluetooth headset, a mobile phone, a tablet computer and the like. Referring to fig. 1, the electronic device includes a battery assembly and a system circuit 200, the system circuit 200 is a circuit composed of a microprocessor, a camera driving circuit, an image processor, and the like, the system circuit 200 is electrically connected to the battery assembly, and the battery assembly is used for supplying power to the system circuit 200. The battery assembly comprises a battery 300, a system-on-chip 100 and a first switch unit 180, wherein the system-on-chip 100 is electrically connected with the positive electrode and the negative electrode of the battery 300, the battery 300 supplies power to the system-on-chip 100, the system circuit 200 is electrically connected with the system-on-chip 100 through the first switch unit 180, specifically, the input end of the first switch unit 180 is electrically connected with the battery 300, the output end of the first switch unit 180 is electrically connected with the system circuit, so that the battery 300, the system circuit 200 and the first switch unit 180 form a power supply loop, and the control end of the first switch unit 180 is electrically connected with the system-on-chip 100. The system-on-chip 100 plays a role in protection, for example, when the battery 300 is overcharged or overdischarged, and since how the system-on-chip 100 protects the battery 300 from overcharge or overdischarge is a common technical means in the art, it is not described herein again. In the present embodiment, the number of the battery 300 is one or more, and when the number of the battery 300 is plural, the plural batteries 300 may be connected in parallel or in series or in parallel, and may be mixed, the battery 300 is preferably a lithium battery 300, the capacity of the battery 300 is 10mAH to 80mAH, for example, 10mAH, 20mAH, 30mAH, 40mAH, 50mAH, 60mAH, 70mAH, and 80mAH, the size of the battery 300 with such a capacity is smaller, and preferably, the capacity of the battery 300 is 20mAH to 40mAH, and then the size of the battery 300 is smaller, and the battery can be conveniently configured in a small electronic device, for example, a bluetooth headset. Furthermore, since the capacity of the battery 300 is so small, how the amount of electricity of the battery 300 is maintained for a long time becomes an important issue. In this embodiment, the System on chip 100 (SO) is a technology commonly used in the field of integrated circuits, and is intended to combine a plurality of integrated circuits with specific functions on one chip to form a System or product, which includes a finished hardware System and embedded software carried by the System or product. The system-on-chip 100 has significant advantages in performance, cost, power consumption, reliability, and life cycle and range of use. In this embodiment, a first resistor R1 and a capacitor C are further disposed between the battery 300 and the system-on-chip 100, and the first resistor R1 and the capacitor C are disposed for filtering. In addition, in other embodiments of the present application, referring to fig. 2, the capacitor C may not be disposed between the battery 300 and the system-on-chip 100. In addition, in other embodiments of the present application, other circuits or electronic elements may be disposed between the battery 300 and the system-on-chip 100.

In this embodiment, the first switch unit 180 includes a switch transistor and a substrate control circuit, the switch transistor is an MOS transistor, a control terminal of the switch transistor is electrically connected to the system-on-chip 100, specifically, to the control unit 160 of the later-mentioned system-on-chip 100, the substrate control circuit is electrically connected to the control unit 160 of the system-on-chip 100, and the substrate control circuit is configured to implement correct bias of a substrate of the switch transistor. However, the present application is not limited thereto, and in other embodiments of the present application, the first switch unit 180 may further include a charge switch and a discharge switch, where the charge switch and the discharge switch are both MOS transistors, and the charge switch and the discharge switch are respectively electrically connected to the control unit 160. In addition, in other embodiments of the present application, the first switch unit 180 may also be implemented in other forms, such as only one switch tube. In this embodiment, the first switch unit 180 is configured to control the battery 300 to supply power to the system circuit 200, specifically, a loop is formed by the battery 300, the system circuit 200, and the first switch unit 180 to supply power to the system-on-chip 100. Specifically, the control terminal of the first switch unit 180 is electrically connected to the control unit 160, the input terminal of the first switch unit 180 is electrically connected to the battery 300, for example, the negative electrode of the battery 300, and the output terminal of the first switch unit 180 is electrically connected to the system circuit 200, so that the battery 300, the system circuit 200, and the first switch unit 180 form a power supply loop, and the system-on-chip 100 can control whether the battery 300 supplies power to the system circuit 200 by controlling the first switch unit 180. In the present embodiment, the first switch unit 180 is implemented outside the system-on-chip 100, but in other embodiments of the present application, the first switch unit 180 may also be implemented on the system-on-chip 100.

In this embodiment, referring to fig. 1 and fig. 3 in combination, the system on chip 100 includes a power supply pin VDD, a power ground pin GND, an overcharge protection unit 110, an overdischarge protection unit 190, a discharge overcurrent protection unit 130, a reference voltage generation unit 140, a frequency generation unit 150, a control unit 160, a wake-up unit 170, and a control pin CTR.

In this embodiment, the power supply pin VDD and the power ground pin GND are respectively used for electrically connecting with the positive electrode and the negative electrode of the battery 300, so that the battery 300 can supply power to the system-on-chip 100, and meanwhile, the battery 300 forms a loop through the system-on-chip 100 and the system circuit 200 to supply power to the system circuit 200.

In the embodiment, the overcharge voltage protection unit 110 is used to protect the battery 300 when detecting that the charge voltage is too high during the charging process of the battery 300, for example, stopping charging the battery 300, and so on, so as to prevent the battery 300 from being damaged or causing safety problems.

In the embodiment, the over-discharge voltage protection unit 190 is used for protecting the battery 300 when detecting that the discharge voltage is too low during the discharge process of the battery 300, for example, controlling the battery 300 to discharge only minimally, and generally stopping supplying power to the system circuit 200 and stopping supplying power to circuits of the system on chip 100 except for the charge detection circuit, so as to prevent the battery 300 from being permanently damaged due to over-discharge of the battery 300.

In the embodiment, the discharge overcurrent protection unit 130 is used for protecting the battery 300 when detecting that the discharge current is too large during the discharge of the battery 300, for example, the battery 300 stops discharging, and the like, so as to prevent the battery 300 from being permanently damaged or causing a safety problem due to the too large discharge current. In the present embodiment, the discharge overcurrent protection unit 130 includes a plurality of sub-units, each of which is electrically connected to the control unit 160, and each of which is used for processing different discharge currents, and three sub-units are provided in the figure.

In the present embodiment, the reference voltage generating unit 140 is configured to generate a reference voltage required by the system on chip 100, the frequency generating unit 150 is configured to generate different frequencies, and the control unit 160 is electrically connected to the overcharge voltage protecting unit 110, the overdischarge voltage protecting unit 190, the discharge overcurrent protecting unit 130, the reference voltage generating unit 140, the frequency generating unit 150, the wake-up unit 170, the first switch unit 180, and the like. In this embodiment, the overcharge voltage protection unit 110, the overdischarge voltage protection unit 190, the discharge overcurrent protection unit 130, the reference voltage generation unit 140, the frequency generation unit 150, and the control unit 160 are conventional circuits in the art, and are not described herein again.

In the present embodiment, the wake-up unit 170 is a charging detection unit for detecting whether the electronic device is connected to a power source through a charger to charge the battery 300, and when the electronic device is connected to the power source through the charger, the charging detection unit detects a charging signal to charge the battery 300. In this embodiment, if the over-discharge voltage protection unit 190 protects the battery 300, and the charging detection unit detects the charging signal at this time, the over-discharge voltage protection of the battery 300 is exited, that is, the system circuit 200 is normally powered again and the system on chip 100 is normally powered.

In this embodiment, the control pin CTR is electrically connected to the control unit 160 inside the system on chip 100, the control pin CTR is used for electrically connecting to the first switch unit 180, and the control unit 160 controls on/off of the first switch unit 180 through the control pin CTR. In the present embodiment, the number of the control pins CTR is one. However, the present application is not limited thereto, and in other embodiments of the present application, the number of the control pins CTR may be plural.

In this embodiment, with continued reference to fig. 1 and fig. 3, the power supply pin VDD is further electrically connected to the shipping output terminal 210 of the system circuit 200, so that the output of the electric quantity of the battery 300 is divided into two branches from the power supply pin VDD, one branch enters the system-on-chip 100 via the power supply pin VDD, and the other branch enters the system circuit 200 via the shipping output terminal 210, when the system circuit 200 is controlled to change the signal of the shipping output terminal 210, the voltage signal of the power supply pin VDD is changed accordingly, at this time, the system-on-chip 100 performs a shipping mode, and in the shipping mode, the system-on-chip 100 outputs a control signal for turning off the first switch unit 180 to the control pin CTR to stop the battery 300 from supplying power to the system circuit 200, and at least a part of the units of the system-on-chip 100 are stopped supplying power. In this embodiment, the control system circuit 200 may be implemented by software or hardware, and when implemented by hardware, the control system circuit may be implemented by, for example, a power key or a sound key of the electronic device, for example, by pressing the power key for a long time to change the signal at the shipping output 210.

In this embodiment, the wake-up unit 170 continues to be powered by the battery 300 while in the shipping mode, and the wake-up unit 170 is used to cause the system-on-chip 100 to exit the shipping mode. In this embodiment, since the wake-up unit 170 is a charge detection circuit, which is originally the circuit of the system-on-chip 100, the design can save the cost. In this embodiment, when the electronic device is charged, the charging detection circuit detects the charging signal, and the system-on-chip 100 automatically exits the shipping mode, so that the electronic device can be normally powered on for use because the power of the battery 300 can be maintained for a long time. In addition, in other embodiments of the present application, the wake-up unit 170 may not be a charge detection circuit, but may also be another additional hardware circuit dedicated to enabling the system-on-chip 100 to exit the shipping mode, and those skilled in the art may perform circuit design according to specific requirements.

In this embodiment, when the electronic device needs to be transported for a long distance or stored for a long time, the system-on-chip 100 of the electronic device may enter a shipping mode, in which the control unit 160 of the system-on-chip 100 controls the first switch unit 180 to be turned off through the control pin CTR, such that the power of the battery 300 may be greatly saved, and, in the shipping mode, at least some units of the system-on-chip 100 are powered down, such that the battery 300 only needs to continue to supply power to a few circuit units, such as a wake-up circuit of the system-on-chip 100, such that the power consumption of the battery 300 is further reduced, the current consumption of the electronic device may be reduced, the current consumption may be as low as several nA/h, such that the power retention time of the battery 300 may be increased, even if the capacity of the battery 300 itself is relatively small, the power of the battery 300 may be retained for a half year to a year in the shipping mode, after the user takes the electronic device, the user can make the system-on-chip 100 exit the shipping mode only by waking up the unit 170, and the electronic device can be normally used when being started, so that the user experience is improved, and the user is prevented from mistakenly thinking the quality problem of the electronic device.

In the present embodiment, at least some of the units of the system-on-chip 100 are powered off in the shipping mode. In the present embodiment, at least one of the overcharge voltage protection unit 110, the overdischarge voltage protection unit 190, the discharge overcurrent protection unit 130, the control unit 160, the reference voltage generation unit 140, and the frequency generation unit 150 of the system-on-chip 100 is stopped from being supplied with power, for example, one of the overcharge voltage protection unit 110, the overdischarge voltage protection unit 190, the discharge overcurrent protection unit 130, the control unit 160, the reference voltage generation unit 140, and the frequency generation unit 150 is stopped from being supplied with power in the ship mode, or two of the overcharge voltage protection unit 110, the overdischarge voltage protection unit 190, the discharge overcurrent protection unit 130, the control unit 160, the reference voltage generation unit 140, and the frequency generation unit 150 are stopped from being supplied with power in the ship mode, or the overcharge voltage protection unit 110, the overdischarge voltage protection unit 190, the discharge overcurrent protection unit 130, the control unit 160, the frequency generation unit 150 are stopped from being supplied with power in the ship mode, Three of the control unit 160, the reference voltage generating unit 140, and the frequency generating unit 150 are stopped from supplying power, …, or the overcharge voltage protecting unit 110, the overdischarge voltage protecting unit 190, the discharge overcurrent protecting unit 130, the control unit 160, the reference voltage generating unit 140, and the frequency generating unit 150 are all stopped from supplying power in the shipping mode, at which time the consumption of the power of the battery 300 can be further reduced. In addition, in other embodiments of the present application, the system-on-chip 100 further includes a temperature protection unit 410, a charging overcurrent protection unit 120, and the like, and the temperature protection unit 410 and the charging overcurrent protection unit 120 may not be powered or may be powered in the shipping mode, which is also a protection scope of the present application. In this embodiment, when the system-on-chip 100 enters the ship mode, all circuit units of the system-on-chip 100 except the wake-up unit 170 are powered off, that is, except the wake-up unit 170 required by the system-on-chip 100 to exit the ship mode is powered, other circuit units of the system-on-chip 100 are not powered, so that the power of the battery 300 can be further saved, the power consumption of the battery 300 is reduced, the power retention time of the battery 300 is further prolonged, and especially the power retention time of the small-capacity battery 300 can be prolonged.

In this embodiment, the following ways to realize the change of the signal at the shipping output 210 of the system circuit 200, which results in the change of the voltage signal received at the power supply pin VDD, are described separately below. Of course, the manner of implementing the change of the signal at the shipping output 210 of the system circuit 200 to cause the change of the voltage signal received at the power supply pin VDD is not limited to the following, and in other embodiments of the present application, a person skilled in the art may also configure other conventional circuits to implement the change of the signal at the shipping output 210 of the system circuit 200 to cause the change of the voltage signal received at the power supply pin VDD.

1. In an embodiment of the present application, referring to fig. 1, 3 and 4, the system-on-chip 100 enters the shipping mode when the number of pulses received by the power supply pin VDD within the predetermined time period is greater than or equal to a first predetermined number. Specifically, the shipping output terminal 210 is electrically connected to the power supply pin VDD through the second resistor R2, the second resistor R2 has the same resistance as the first resistor R1, and the shipping output terminal 210 is in a high-impedance state in a normal state, which can also be regarded as that the shipping output terminal 210 is controlled to be disconnected through a switch, and at this time, the voltage signal received by the power supply pin VDD is only affected by the battery 300 and is not affected by the shipping output terminal 210 of the system on chip 100. When the shipping output terminal 210 is controlled by the system circuit 200 to output a pulse signal, for example, when the switch is closed, the high level of the pulse signal is, for example, the battery voltage, the low level of the pulse signal is, for example, 0V, when the shipping output terminal 210 is at the high level, the voltage at the power supply pin VDD is the battery voltage, when the shipping output terminal 210 is at 0V, the battery voltage is divided by the first resistor R1 and the second resistor R2, the voltage at the power supply pin VDD is lower than the battery voltage, which is half the battery voltage in this embodiment, so that the voltage at the power supply pin VDD is also a pulse voltage, the high level of the pulse voltage at the power supply pin VDD is the battery voltage, and the low level is half the battery voltage. In this embodiment, the system-on-chip 100 further includes a pulse counting unit 420. The pulse counting unit 420 outputs a low level signal under normal conditions, and the power supply pin VDD is electrically connected to the pulse counting unit 420. When the pulse signal is output from the power supply pin VDD due to the output of the pulse signal from the ship output end 210, the pulse counting unit 420 counts the pulses, and when the number of pulses received by the pulse counting unit 420 in a first predetermined time period is greater than or equal to a first predetermined number, the output signal of the pulse counting unit 420 is changed from a low level to a high level, where the first predetermined time period and the first predetermined number are preset by the system-on-chip 100, the first predetermined time period is, for example, 10 seconds, 5 seconds, 3 seconds, 1 second, and the like, and the first predetermined number is, for example, 3, 4, 5, and the like, and thus the design can prevent false triggering. In the present embodiment, the output terminals of the pulse counting unit 420 are respectively electrically connected to the overcharge voltage protection unit 110, the overdischarge voltage protection unit 190, the discharge overcurrent protection unit 130, the reference voltage generation unit 140, the frequency generation unit 150, the control unit 160, and other units that need to be powered off, and when the pulse counting unit 420 outputs a high level, the power supply to the units of the system-on-chip 100 other than the wake-up unit 170 may be controlled to be powered off. In addition, in other embodiments of the present application, the output terminal of the pulse counting unit 420 outputs a high level under a normal condition, and at this time, the pulse counting unit 420 outputs a low level for controlling to stop the power supply to the units of the system on chip 100 except the wake-up unit 170. In the present embodiment, the pulse counting unit 420 is provided separately from the control unit 160. In addition, in other embodiments of the present application, the pulse counting unit 420 may also be integrated into the control unit 160. In addition, in other embodiments of the present application, the pulse counting unit 420 may be used to control to stop the power supply to the partial units of the system-on-chip 100.

2. Referring to fig. 2, in general, when the battery 300 is deeply discharged, the conventional system-on-chip 100 or the battery protection circuit detects the deep discharge of the battery 300 through the over-discharge voltage protection unit 190, specifically, determines whether the deep discharge is performed by detecting whether the voltage at the power supply pin VDD is lower than a preset threshold voltage, if the deep discharge voltage is lower than the preset threshold voltage, the over-discharge voltage protection unit 190 determines that the battery 300 is in a deep discharge state, the over-discharge voltage protection unit 190 sends a signal to the control unit 160, the control unit 160 passively controls the first switch unit 180 to be turned off through the control pin CTR, and passively controls the system-on-chip 100 or the battery protection circuit except the charge detection unit to be powered off for protecting the battery 300 from damage due to the over-discharge until the charge detection unit detects a charge signal and then the system-on-chip 100 or the battery protection circuit resumes the power supply The first switching unit 180 is turned off to restore power supply to the system circuit 200. In an embodiment of the present application, original circuits and functions of the over-discharge voltage protection unit 190 in the prior art are fully utilized, and the first switch unit 180 is actively controlled to be turned off through the control pin CTR, and the system-on-chip 100 except for the charge detection unit is actively controlled to be powered off, so that the power retention time of the battery 300 is prolonged, and meanwhile, the cost can be reduced. Specifically, referring to fig. 5-6, the shipping output end 210 of the system circuit 200 is electrically connected to the power supply pin VDD via the second resistor R2, the second resistor R2 has the same resistance as the first resistor R1, and the shipping output end 210 is in a high-impedance state under a normal state. Specifically, in the present embodiment, the system circuit 200 includes the second switch unit 220, and an input terminal of the second switch unit 220 is connected to the first level, where the first level is 0, that is, grounded, but the first level may not be 0 as long as the voltage at the power supply pin VDD is lower than the preset threshold voltage when the second switch unit 220 is turned on. The output end of the second switch is electrically connected to one end of a second resistor R2, the other end of the second resistor R2 is electrically connected to a power supply pin VDD, the control end of the second switch unit 220 is controlled by hardware or software of the system circuit 200, under a general condition, the second switch unit 220 is turned off, the shipping output end 210 is in a high impedance state, when the on-chip system 500 needs to enter a shipping mode, a user can control the second switch unit 220 to be turned off through software or hardware, at this time, a branch formed by the power supply pin VDD, the second resistor R2, and the second switch unit 220 is turned on, since the second resistor R2 and the first resistor R1 have the same resistance value, the second resistor R2 and the first resistor R1 divide the battery voltage, so that the voltage signal received at the power supply pin VDD is reduced, in this embodiment, the battery voltage is reduced to half, and generally half of the battery voltage is lower than a preset threshold voltage set by deep discharge, generally, the battery 300 supplies a voltage in the range of 2.8V to 4.2V, the threshold voltage for deep discharge is typically 2.8V, and half the battery voltage is in the range of 1.4V to 2.1V, below the threshold voltage for deep discharge. Thus, when the second switching unit 220 is turned on, the over-discharge voltage protection unit 190 detects that the voltage of the power supply pin VDD is lower than the threshold voltage, and at this time, the over-discharge voltage protection unit 190 controls the first switching unit 180 to be turned off through the control pin CTR, and controls other units of the system-on-chip 500 except for the charge detection unit to be stopped from being supplied with power. In the present embodiment, the second switch unit 220 is an NMOS transistor. However, the present application is not limited thereto, and in other embodiments of the present application, the second switching unit 220 may also be a PMOS transistor. In general, the system-on-chip 500 has two protection modes for deep discharge: when the system on chip 500 is in the overdischarge recoverable mode, and the voltage of the power supply pin VDD is detected by the overdischarge voltage protection unit 190 to be lower than a preset threshold voltage (for example, false detection), the first switch unit 180 is controlled to be turned off by the control pin CTR, the system on chip 500 except the charging detection unit is powered off, when the voltage of the power supply pin VDD is increased to be higher than the preset threshold voltage, the unit which is powered off automatically recovers power supply to the system on chip 500, and the first switch unit 180 is turned on; when the system-on-chip 500 is in the overdischarge unrecoverable mode, when the overdischarge voltage protection unit 190 detects that the voltage of the power supply pin VDD is lower than the preset threshold voltage, the first switch unit 180 is controlled to be turned off through the control pin CTR, and the system-on-chip 500 except for the charge detection unit is stopped supplying power, in this mode, even if the voltage at the power supply pin VDD is increased to be higher than the preset threshold voltage, the first switch unit 180 is still kept turned off, and the system-on-chip 500 except for the charge detection unit continues to be stopped supplying power, in this case, only when the charge detection module detects a charge signal, the unit of the system-on-chip 500 which stops supplying power resumes supplying power, and the first switch unit 180 is turned on. In the present embodiment, the system-on-chip 500 operates in the overdischarge unrecoverable mode, in which the second switching unit 220 is turned off due to no power supply in the shipping mode, the first switching unit 180 is still turned off, and the system-on-chip 500 except for the charge detection unit continues to be powered off, thereby facilitating the maintenance of the amount of power of the battery 300.

3. On the basis of the mode 1, in an embodiment of the present application, original circuits and functions of the over-discharge voltage protection unit 190 in the prior art are fully utilized, and the first switch unit 180 is actively controlled to be turned off through the control pin CTR, and the system-on-chip 100 except for the charging detection unit is actively controlled to be powered off, so that the cost can be reduced. Specifically, referring to fig. 1, 7 and 8, the over-discharge voltage protection unit 190 includes a comparator 191, the comparator 191 has a first and a second opposite ends, the first and the second opposite ends are respectively a first and a second opposite ends, the non-inverting end of the comparator 191 is connected to a reference voltage, and the first opposite end of the comparator 191 is electrically connected to an output voltage detection point of the battery 300 for detecting whether the battery 300 is deeply discharged, where the first opposite end is electrically connected to a voltage supply pin. In this embodiment, the system on chip 100 further includes a third switching unit 440 and a third resistor R3, a control terminal of the third switching unit 440 is electrically connected to the output terminal of the pulse counting unit 420, an input terminal of the third switching unit 440 is grounded, an output terminal of the third switching unit 440 is electrically connected to one terminal of the third resistor R3, the other terminal of the third resistor R3 is connected to a high level, and an output terminal of the third switching unit 440 is further electrically connected to a second reverse terminal of the comparator 191 of the over-discharge voltage protection unit 190, where the first reverse terminal and the second reverse terminal have higher priority of low level, that is, when one of the first reverse terminal or the second reverse terminal is at a low level, the reverse terminal of the comparator 191 is at the low level. In this embodiment, when the pulse counting unit 420 outputs a high level, the third switching unit 440 is turned on, the second inverting terminal of the comparator 191 is grounded, and the inverting terminal of the comparator 191 is at a low level, so that the output of the comparator 191 is changed from the low level to the high level, and the first switching unit 180 is controlled to be turned off through the control pin CTR, and the power supply of the system-on-chip 100 except for the charging detection unit is controlled to be stopped. In this embodiment, the third switching unit 440 is an NMOS transistor. However, the present application is not limited thereto, and in other embodiments of the present application, the third switching unit 440 may also be a PMOS transistor, and the pulse counting unit 420 outputs a low level to turn on the third switching unit 440. In the present embodiment, the system-on-chip 100 operates in an over-placed unrecoverable mode.

In this embodiment, referring to fig. 1 and fig. 3 in combination, the system on chip 100 further includes a system ground pin VM, the system ground pin VM is used for electrically connecting to the system circuit 200, and the system ground pin VM is also used for charging.

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, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

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 system on a chip, comprising: the battery protection system comprises a power supply pin, a power grounding pin, an over-discharge voltage protection unit, a control unit, a wake-up unit and a control pin, wherein the power supply pin and the power grounding pin are respectively used for being electrically connected with a battery;

the control pin is used for controlling a first switch unit, the first switch unit is used for controlling a battery to supply power to a system circuit, the control end of the first switch unit is used for being electrically connected with the control pin, the input end of the first switch unit is used for being electrically connected with the battery, and the output end of the first switch unit is used for being electrically connected with the system circuit;

2. The system-on-chip of claim 1, wherein the system-on-chip enters a ship mode when a number of pulses received by a power pin over a predetermined period of time is greater than or equal to a first predetermined number.

3. The system-on-chip of claim 2, further comprising a pulse counting unit electrically connected to the power pin, the system-on-chip entering a ship mode when the pulse counting unit confirms that a number of pulses received by the power pin within a predetermined time period is greater than or equal to a first predetermined number.

4. The system on chip of claim 3, wherein the over-discharge voltage protection unit includes a comparator, the system on chip further includes a third switching unit and a third resistor, a control terminal of the third switching unit is electrically connected to the output terminal of the pulse counting unit, an input terminal of the third switching unit is grounded, an output terminal of the third switching unit is electrically connected to one terminal of the third resistor, the other terminal of the third resistor is connected to a high level, an output terminal of the third switching unit is further electrically connected to an opposite terminal of the comparator, when the pulse counting unit determines that the number of pulses received by the power supply pin within a predetermined time period is greater than or equal to a first predetermined number, a control signal is output to turn on the third switching unit, an output signal of the comparator changes to control the system on chip to enter a ship mode, and the units of the system-on-chip except the wake-up unit are powered off in the shipping mode.

5. The system-on-chip of claim 1, wherein the system-on-chip enters a ship mode when a voltage signal received by a power supply pin is below a predetermined threshold voltage due to voltage division of a branch in which the ship output is located.

6. The system on chip of claim 5, wherein the over-discharge voltage protection unit is electrically connected to the power supply pin, and when a voltage signal of the power supply pin is lower than a threshold voltage, the over-discharge voltage protection unit controls the system on chip to enter a ship mode, in which the first switch unit is turned off and all units of the system on chip except the wake-up unit are powered off.

7. The system on chip of any of claims 1-6, wherein the wake-up unit is a charge detection unit.

8. The system-on-chip of claim 7, wherein the system-on-chip exits shipping mode when a charge detection unit detects a charge signal.

9. The system on a chip of any one of claims 1-3 and 5, further comprising an overcharge voltage protection unit, a discharge overcurrent protection unit, a reference voltage generation unit, and a frequency generation unit, wherein at least one of the overcharge voltage protection unit, the overdischarge voltage protection unit, the discharge overcurrent protection unit, the control unit, the reference voltage generation unit, and the frequency generation unit is powered down in the ship mode.

10. The system on chip of claim 9, wherein the units of the system on chip other than the wake-up unit are powered down in a ship mode.

11. The system on chip of any of claims 1-6, wherein the first switching unit comprises a MOS transistor.

12. A battery assembly, comprising:

a battery;

the system on chip of any one of claims 1-11, wherein a power supply pin and a power ground pin of the system on chip are electrically connected to a battery, respectively;

the first switch unit is electrically connected with a control pin of the system on chip, the input end of the first switch unit is electrically connected with a battery, and the output end of the first switch unit is electrically connected with a system circuit.

13. The battery assembly of claim 12, wherein the battery has a capacity of 10mAH to 80 mAH.

14. An electronic device, comprising:

the battery module according to claim 12 or 13;

15. The electronic device of claim 14, wherein the electronic device is a bluetooth headset.

16. The electronic device according to claim 14 or 15, wherein the shipping output of the system-on-chip circuit is electrically connected to a power supply pin of the system-on-chip via a second resistor, the power supply pin of the system-on-chip is electrically connected to a positive electrode of the battery via a first resistor, and the shipping output is in a high impedance state at a time other than when outputting the signal for causing the system-on-chip to enter the shipping mode.