CN112311081A - Method for preventing intelligent sound box from suddenly powering down - Google Patents
Method for preventing intelligent sound box from suddenly powering down Download PDFInfo
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- CN112311081A CN112311081A CN201910702127.0A CN201910702127A CN112311081A CN 112311081 A CN112311081 A CN 112311081A CN 201910702127 A CN201910702127 A CN 201910702127A CN 112311081 A CN112311081 A CN 112311081A
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- Prior art keywords
- sound box
- power supply
- pmu
- intelligent sound
- battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Abstract
The invention provides a method for preventing sudden power failure of an intelligent sound box, which comprises the following steps: s1, connecting a PMU in the intelligent sound box with a DC/DC power supply chip, wherein the input of the DC/DC is battery voltage, the output of the DC/DC is 5V voltage output, and the 5V voltage output is connected to USB _5V of the PMU; s2, the intelligent sound box system judges whether the battery of the intelligent sound box is fully charged, and when the battery of the intelligent sound box is fully charged, the DC/DC power supply chip does not work; s3, when the battery voltage of the intelligent sound box is too low, the ADC of the intelligent sound box detects that the battery voltage enters the alarm voltage, the intelligent sound box system enables the DC/DC power supply chip to output 5V voltage according to the detection result of the ADC, and the USB _5V of the PMU is electrified; s4, the USB _5V of PMU is powered, the PMU considers that the external power supply is connected, the power supply is automatically switched to the USB _5V, and at the moment, the user is prompted that the battery power is low.
Description
Technical Field
The invention relates to the field of intelligent sound boxes, in particular to a method for preventing sudden power failure of an intelligent sound box.
Background
With the continuous development of science and technology, especially the development of computer technology, more and more intelligent electronic products are used in people's daily life, such as intelligent sound boxes. More and more intelligent loudspeaker box technologies provide better experience for users and more convenient service. At present, intelligent sound boxes are electronic products in the market with a lot of fire, and most of the power supply schemes of the intelligent sound boxes adopt PMU schemes. The PMU is a power management unit and integrates circuits such as a plurality of paths of DC/DC and LDO, a battery charging charger, an ADC for detecting the voltage of the battery and the like. The detection of the electric quantity of the battery is realized by detecting the voltage of the battery through the ADC. When the detected battery voltage is 4.2V, the battery is fully charged, and when the detected battery voltage is 3.6V, the battery is considered to be low and an alarm is given. Fig. 1 is a simple schematic diagram of a PMU.
The Power input of the PMU may be from a lithium battery BAT, a USB — 5V input, an external Power supply ACIN (such as an AC Adapter), and a Power Path (Power Path) selects an appropriate Power distribution mode according to the states of the external Power supply and the lithium battery. When only the lithium battery is connected and no external power supply is input, the lithium battery is used for supplying power; when an external power supply is accessed (VBUS or ACIN), the external power supply is preferentially used for supplying power; under the condition of battery connection, when an external power supply is removed, the power supply is changed to a lithium battery for power supply in a seamless mode; when both VBUS and ACIN are accessed simultaneously, ACIN is preferentially used for power supply and the lithium battery is charged.
At present, intelligence audio amplifier product generally has the warning sound when the start, and suggestion customer audio amplifier begins work, and the warning sound sends in the twinkling of an eye, owing to need great electric current to promote loudspeaker vocal, battery voltage can reduce about 0.3-0.6V in the twinkling of an eye, then along with the warning sound finishes voltage recovery normal, when the battery is full of electricity, the start warning sound sends, though battery voltage can reduce, battery voltage has not reached battery overdischarge protection voltage yet, and the audio amplifier can normally work. When battery power drops to 3.6V, the start-up warning tone is sent, and battery voltage is drawn low in the twinkling of an eye, triggers battery overdischarge protection voltage, PMU outage, and this kind of warning tone has not been said yet, and the experience that the system was cut off the power supply suddenly for the customer is very not good, can let the customer mistake think product quality goes out the problem, increases the risk of changing goods back.
Disclosure of Invention
In order to solve the problems in the prior art, the present invention aims to: the power supply is powered by the lithium battery when only the lithium battery is connected and no external power supply is input through selecting a proper electric energy distribution mode according to the states of the external power supply and the lithium battery by the PMU; when an external power supply (USB or ACIN) is connected, the external power supply is preferentially used for supplying power.
The invention provides a method for preventing sudden power failure of an intelligent sound box, which comprises the following steps:
s1, connecting a PMU in the intelligent sound box with a DC/DC power supply chip, wherein the input of the DC/DC is battery voltage, the output of the DC/DC is 5V voltage output, and the 5V voltage output is connected to USB _5V of the PMU;
s2, the intelligent sound box system judges whether the battery of the intelligent sound box is fully charged, and when the battery of the intelligent sound box is fully charged, the DC/DC power supply chip does not work;
s3, when the battery voltage of the intelligent sound box is too low, the ADC of the intelligent sound box detects that the battery voltage enters the alarm voltage, the intelligent sound box system enables the DC/DC power supply chip to output 5V voltage according to the detection result of the ADC, and the USB _5V of the PMU is electrified;
s4, the USB _5V of PMU is powered, the PMU considers that the external power supply is connected, the power supply is automatically switched to the USB _5V, and at the moment, the user is prompted that the battery power is low.
The DC/DC power supply chip does not work, namely no 5V voltage is output.
When the battery voltage is too low, the battery voltage is reduced to 3.6V.
The USB _5V interface of the PMU may be configured as an external interface capable of being externally connected.
The USB _5V external interface of the PMU can be arranged on the shell of the intelligent sound box.
The connected DC/DC power supply chip can be a module arranged in the intelligent sound box, and can also be an external module through an external interface.
The external module can be provided with an outer shell.
The module of the DC/DC power supply chip arranged through the external interface can be connected with the external interface of the USB _5V interface of the PMU.
The application has the advantages that: when the PMU is powered by a battery, when the external power supply is accessed, seamless switching is performed to supply power to the external power supply, and the problem of sudden power failure caused by triggering over-discharge protection of the battery when the battery voltage is low is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
Fig. 1 is a schematic block diagram of a PMU of a smart speaker according to the present invention.
Fig. 2 is a schematic block diagram of a protection device to which the present method is applied.
Fig. 3 is a schematic flow diagram of a method to which the present invention relates.
Detailed Description
Currently, the technical terms commonly used in the technical field include:
PMU: the power management unit integrates circuits such as a plurality of paths of DC/DC and LDOs, a battery charging charger, an ADC for detecting the voltage of the battery and the like.
ADC: analog to digital converter.
DC to DC converter: direct current-to-direct current converters, also referred to as DC-to-DC converters, may convert a Direct Current (DC) power source into a direct current (or near direct current) power source of different voltages. The power range can be from very small (small battery) to very large (high voltage power conversion).
LDO: low dropout voltage regulator, so called linear regulator, can only be used in buck applications. I.e. the output voltage must be smaller than the input voltage.
Battery over-discharge protection voltage: in order to prevent the over-discharge of the battery, when the voltage of the battery is low to a certain degree, the power supply of the battery is forcibly cut off so as to protect the battery from being damaged by the over-discharge.
As shown in figure 2, the invention adds a DC/DC power supply chip, the input is the battery voltage, the output is the 5V voltage output, the 5V output is connected to the USB _5V of PMU, when the battery is full, the DC/DC power supply chip does not work, no 5V voltage output exists, when the battery voltage is low, the ADC detects that the battery voltage enters the alarm voltage, the system enables the DC/DC power supply chip according to the ADC detection result, the 5V voltage output, the USB _5V of PMU is electrified, the PMU considers that the external power supply is connected, the PMU automatically switches to the power supply by the USB _5V, at this time, the system can send out the prompt tone to prompt the user that the battery is low, and is about to be shut down, when the prompt tone is sent, although the battery voltage is pulled down instantaneously, the external power supply USB _5V is considered, the battery over-discharge protection which is not triggered, the power failure can be avoided suddenly, the user can have time to charge or shut down, and the customer experience is improved.
As shown in fig. 3, a method for preventing a sudden power failure of a smart speaker, the method includes the following steps:
s1, connecting a PMU in the intelligent sound box with a DC/DC power supply chip, wherein the input of the DC/DC is battery voltage, the output of the DC/DC is 5V voltage output, and the 5V voltage output is connected to USB _5V of the PMU;
s2, the intelligent sound box system judges whether the battery of the intelligent sound box is fully charged, and when the battery of the intelligent sound box is fully charged, the DC/DC power supply chip does not work;
s3, when the battery voltage of the intelligent sound box is too low, the ADC of the intelligent sound box detects that the battery voltage enters the alarm voltage, the intelligent sound box system enables the DC/DC power supply chip to output 5V voltage according to the detection result of the ADC, and the USB _5V of the PMU is electrified;
s4, the USB _5V of PMU is powered, the PMU considers that the external power supply is connected, the power supply is automatically switched to the USB _5V, and at the moment, the user is prompted that the battery power is low.
The DC/DC power supply chip does not work, namely no 5V voltage is output.
When the battery voltage is too low, the battery voltage is reduced to 3.6V.
The USB _5V interface of the PMU may be configured as an external interface capable of being externally connected.
The USB _5V external interface of the PMU can be arranged on the shell of the intelligent sound box.
The connected DC/DC power supply chip can be a module arranged in the intelligent sound box, and can also be an external module through an external interface.
The external module can be provided with an outer shell.
The module of the DC/DC power supply chip arranged through the external interface can be connected with the external interface of the USB _5V interface of the PMU.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for preventing sudden power failure of a smart sound box is characterized by comprising the following steps:
s1, connecting a PMU in the intelligent sound box with a DC/DC power supply chip, wherein the input of the DC/DC is battery voltage, the output of the DC/DC is 5V voltage output, and the 5V voltage output is connected to USB _5V of the PMU;
s2, the intelligent sound box system judges whether the battery of the intelligent sound box is fully charged, and when the battery of the intelligent sound box is fully charged, the DC/DC power supply chip does not work;
s3, when the battery voltage of the intelligent sound box is too low, the ADC of the intelligent sound box detects that the battery voltage enters the alarm voltage, the intelligent sound box system enables the DC/DC power supply chip to output 5V voltage according to the detection result of the ADC, and the USB _5V of the PMU is electrified;
s4, the USB _5V of PMU is powered, the PMU considers that the external power supply is connected, the power supply is automatically switched to the USB _5V, and at the moment, the user is prompted that the battery power is low.
2. The method as claimed in claim 1, wherein the DC/DC power supply chip does not operate, i.e. there is no 5V output.
3. The method as claimed in claim 1, wherein the battery voltage is too low when the battery voltage drops to 3.6V.
4. The method as claimed in claim 1, wherein the USB _5V interface of the PMU is configured as an external interface capable of being externally connected to the sound box.
5. The method as claimed in claim 4, wherein the external USB _5V interface of the PMU is disposed on a housing of the smart speaker.
6. The method as claimed in claim 4, wherein the connected DC/DC power supply chip can be a module built in the smart speaker or a module configured as an external type through an external interface.
7. The method as claimed in claim 6, wherein the external module is provided with a housing.
8. The method for preventing sudden power failure of a smart sound box according to claim 6, wherein the module of the DC/DC power supply chip provided through the external interface can be connected to the external interface of the USB _5V interface of the PMU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910702127.0A CN112311081A (en) | 2019-07-31 | 2019-07-31 | Method for preventing intelligent sound box from suddenly powering down |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910702127.0A CN112311081A (en) | 2019-07-31 | 2019-07-31 | Method for preventing intelligent sound box from suddenly powering down |
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| CN112311081A true CN112311081A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910702127.0A Pending CN112311081A (en) | 2019-07-31 | 2019-07-31 | Method for preventing intelligent sound box from suddenly powering down |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339233A (en) * | 1993-05-28 | 1994-12-06 | Matsushita Electric Ind Co Ltd | Power source switching apparatus |
| EP1710662A1 (en) * | 2005-04-07 | 2006-10-11 | Research In Motion Limited | Device and Method for Powering a Peripheral Device |
| US20080054855A1 (en) * | 2006-09-05 | 2008-03-06 | Summit Microelectronics, Inc. | Circuits and methods for controlling power in a battery operated system |
| CN201821132U (en) * | 2010-09-15 | 2011-05-04 | 青岛海信电器股份有限公司 | Power supply system and electronic product |
| CN102938569A (en) * | 2011-08-15 | 2013-02-20 | 联想(北京)有限公司 | Method and device for supplying power to electronic device and electronic device |
| CN105978065A (en) * | 2016-05-12 | 2016-09-28 | Tcl移动通信科技（宁波）有限公司 | Reverse supply output current setting method and device for mobile terminal |
| CN208596958U (en) * | 2018-07-18 | 2019-03-12 | 普联技术有限公司 | A kind of power supply circuit and terminal |
-
2019
- 2019-07-31 CN CN201910702127.0A patent/CN112311081A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339233A (en) * | 1993-05-28 | 1994-12-06 | Matsushita Electric Ind Co Ltd | Power source switching apparatus |
| EP1710662A1 (en) * | 2005-04-07 | 2006-10-11 | Research In Motion Limited | Device and Method for Powering a Peripheral Device |
| US20080054855A1 (en) * | 2006-09-05 | 2008-03-06 | Summit Microelectronics, Inc. | Circuits and methods for controlling power in a battery operated system |
| CN201821132U (en) * | 2010-09-15 | 2011-05-04 | 青岛海信电器股份有限公司 | Power supply system and electronic product |
| CN102938569A (en) * | 2011-08-15 | 2013-02-20 | 联想(北京)有限公司 | Method and device for supplying power to electronic device and electronic device |
| CN105978065A (en) * | 2016-05-12 | 2016-09-28 | Tcl移动通信科技（宁波）有限公司 | Reverse supply output current setting method and device for mobile terminal |
| CN208596958U (en) * | 2018-07-18 | 2019-03-12 | 普联技术有限公司 | A kind of power supply circuit and terminal |
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Application publication date: 20210202 |
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