TWI458218B - Power management system, electronic device and power management method thereof - Google Patents

Description

Power management system, electronic device and power management method thereof

The present invention relates to an electronic device; and more particularly to a power management system and a power management method thereof, and an electronic device including the power management system.

In order to be able to continue to use outdoors, modern mobile electronic devices are equipped with batteries to provide power outside the indoor power supply. In addition, in order to supplement the battery-depleted power for re-use, the battery needs to be charged through the Power Adapter before the power is exhausted.

The conventional power supply is respectively connected to an external power source and an electronic device for converting a high AC voltage (such as 110 volts or 220 volts) provided by an external power source into a rated DC voltage (such as 19 volts) that can be processed by the electronic device. A suitable power source (such as 5 volts) is generated by the DC-DC power supply inside the electronic device for use by other electronic components or battery charging modules. However, even after the battery power is full, the conventional power supply will continue to output the above rated DC voltage to the electronic device. In this way, the rated DC voltage will cause unnecessary energy consumption of the DC-DC power supply inside the electronic device; when the battery is fully charged, the power supply module inside the electronic device (DC- DC power supply) If it can operate with a lower input voltage (such as 12 volts), it will greatly improve work efficiency and reduce unnecessary waste heat.

In addition, when electronic products cause problems in operation (such as the conventional electronic products themselves or the batteries are overheated), the conventional electronic systems often only rely on their own protection mechanisms to prevent damage expansion, but cannot actively monitor the source of the problem ( As is known, the power supply provides excessive voltage and actively provides additional protection.

It can be seen that how to monitor the state of the electronic device and the battery while taking power from the outside and take corresponding measures when necessary is an important issue of the current electronic device power supply system.

An embodiment of the present invention provides a power management system, a power management method thereof, and an electronic device including the power management system, which detects an electrical energy storage state of an electrical energy storage module to adjust a supply voltage and thereby save power and reduce unnecessary The waste heat is generated.

An embodiment of the present invention provides a power management system for an electronic device, including an electrical energy storage module, a state detection module, a charging module, and a power supply module. The state detection module is connected to the electrical energy storage module to detect the electrical energy storage state of the electrical energy storage module. The state detection module selectively outputs the first state signal or the second state signal according to the electrical energy storage state.

In a preferred embodiment of the present invention, when the power storage state of the power storage module is not full, the state detection module outputs a first state signal to the power supply module. On the other hand, when the power storage state is full, the state detection module outputs a second state signal to the power supply module. The power supply module receives the first status signal or the second status signal from the status detection module, wherein the power supply module outputs a charging voltage to the charging module after receiving the first status signal. On the other hand, the charging module will charge the power storage module after receiving the charging voltage.

In addition, the state detection module can be used to detect the working state of the electronic device and correspondingly output the third state signal to the power supply module, so that the power supply module can output the voltage to the charging module and the system voltage corresponding to the third state signal. The module or switch output operating voltage to the charging module and the system voltage module. In one embodiment, the state detection module includes a temperature detecting unit for detecting the temperature of the electronic device or the power storage module, and detecting the temperature higher than a first preset value or lower than a second The third state signal is output to the power supply module at a preset value. The power supply module stops the output voltage to the charging module or switches the output working voltage to the charging module according to the third state signal. In addition, in another embodiment, the state detection module may include a time period management unit for detecting a time setting of the electronic device and including a preset time period, wherein the time period management unit sets the time of the electronic device to the preset. The fourth status signal is output to the power supply module during the time period. The power supply module stops the output voltage from the corresponding fourth state signal to the charging module or switches the output working voltage to the charging module.

In another embodiment, the power supply module includes a charging voltage module and an operating voltage module for respectively generating a charging voltage and an operating voltage. In addition, the power supply module further includes a switching module connected to the charging voltage module, the working voltage module, the electric energy storage module, and the state detecting module, wherein the switching module outputs the same according to the state detecting module. The status signals switch the voltage output to the charging module or stop the output voltage to the charging module.

The electronic device in the embodiment of the present invention is preferably a notebook computer, but is not limited thereto; in various embodiments, the present invention also includes a mobile communication device, a portable music player, or an electronic personal assistant (Personal Digital Assistant). The electronic device of the storage module.

FIG. 1 is a schematic diagram of an electronic device 100 having a power management function according to the present invention. As shown in FIG. 1 , the electronic device 100 includes a power management system formed by the power storage module 300 , the state detection module 400 , and the power supply module. The power storage module 300 of the present embodiment is preferably a device for converting chemical energy stored therein into electrical energy or a device for converting electrical energy into chemical energy storage, but is not limited thereto; in different embodiments, the electrical energy storage module 300 also includes an electronic device 100 that converts energy other than mechanical energy into electrical energy and an electronic device 100 that can be recycled multiple times under electrical energy supply.

In the embodiment shown in FIG. 1 , the state detecting module 400 includes a power detecting unit 410 for detecting the power storage state of the power storage module 300 . The above-mentioned power detecting unit will output the first when the power storage state is in an unfilled state. A status signal A, and outputs a second status signal B when the power storage state is full.

As shown in FIG. 1 , the electronic device 100 includes a power supply module 510 , a system voltage module 520 , and a charging module 530 . The power supply module 510 of the present embodiment is respectively connected to the state detecting module 400, the system voltage module 520, and the charging module 530 for selectively outputting a voltage to the system according to the status signal output by the state detecting module 400. The voltage module 520 and the charging module 530. In this embodiment, after receiving the first status signal A (indicating that the power storage module 300 is not full), the power supply module 510 outputs the charging voltage X to the charging module 530 for the charging module 530. The power storage module 300 is charged according to the charging voltage X.

On the other hand, after receiving the second status signal B (indicating that the power storage module 300 is in a full state), the power supply module 510 outputs the working voltage Y to the charging module 530, and the charging module 530 enters the standby state. . In addition, in this embodiment, the charging voltage X and the operating voltage Y output by the power supply module 510 are voltages of 19 volts and 13 volts, respectively, but are not limited thereto; in different embodiments, the power supply module 510 can be The charging voltage X and the operating voltage Y having different levels are output according to the setting or internal circuit adjustment.

On the other hand, the system voltage module 520 of the embodiment converts the voltage output by the power supply module 510 into a rated voltage of the internal components of the driving electronic device 100. In other embodiments of the invention, the power supply module 510 is in accordance with the status The status signal outputted by the detection module 400 selectively outputs different levels of voltage to the system voltage module 520. For example, the power supply module 510 can output a 19 volt charging voltage X to the system voltage module 520 after receiving the first status signal A. On the other hand, the power supply module 510 can also output a working voltage Y of 13 volts to the system voltage module 520 according to the second status signal B. Subsequently, the system voltage module 520 can further convert the charging voltage X or the operating voltage Y to a lower level (3.3 volts and 5 volts) of rated voltage for driving the internal components of the electronic device 100.

However, in order to reduce waste heat generated by components in the electronic device 100, the power supply module 510 can also output a power source lower than the charging voltage X and the operating voltage Y to the system voltage module 520 when receiving the status signal. For example, the power supply module 510 can fixedly output a voltage of 9 volts to the system voltage module 520 for the system voltage module 520 to further convert the voltage of 9 volts into a rating for driving the internal electronic components of the electronic device 100. Voltage (3.3 volts and 5 volts). The waste heat generated by the system voltage module 520 is positively correlated with the voltage it receives. Therefore, the power supply module 510 can reduce the waste heat generated by the system voltage module 520 by reducing the voltage output to the system voltage module 520 and thereby assist the heat dissipation of the electronic device 100.

In this embodiment, the rated voltage output by the system voltage module 520 is preferably 3.3 volts and 5 volts, but is not limited thereto; in different embodiments, the system voltage module 520 may also be based on the voltage of the electronic components. It is necessary to output a voltage of 9 volts or other level. In addition, the power storage module 300 can also store itself. The chemical energy is converted into electrical energy for conversion by the system voltage module 520 to a voltage rating of the internal components of the drive electronics 100.

FIG. 2 is a schematic diagram of another embodiment of an electronic device 100 having a power management function according to the present invention. The state detecting module 400 further includes a temperature detecting unit 420. The temperature detecting unit 420 is configured to detect the temperature of the power storage module 300 or the electronic device 100, and notify the power supply module to decrease when the temperature is higher than the first preset value or lower than a second preset value. Stop the output voltage. In this embodiment, the temperature detecting unit 420 outputs a third state signal C to the power supply of the power supply module after detecting that the temperature of the power storage module 300 or the electronic device 100 reaches or exceeds 45 ° C. The module 510, wherein the power supply module 510 stops outputting the charging voltage X and simultaneously outputs the operating voltage Y with a lower level to the charging module 530. At this time, the charging module 530 stops supplying power to the power storage module 300. The electric energy storage module 300 is assisted in heat dissipation.

In addition, in the embodiment shown in FIG. 2, the power supply module 510 outputs the operating voltage Y to the charging module 530 after receiving the third status signal C, but is not limited thereto; in different embodiments, the power supply The supply module 510 can also output other levels of voltage or stop output voltage to the charging module 530 according to heat dissipation or other needs.

FIG. 3 is a schematic diagram of another embodiment of an electronic device 100 having a power management function according to the present invention. As shown in FIG. 3, the state detection module 400 further includes a time period management unit 430 for reducing the voltage level output by the power supply module 510 during a certain period of time to reduce the system voltage module 520 and the charging module 530. Waste heat generated.

In this embodiment, the time period management unit 430 has a preset time period and continuously detects the time setting of the electronic device 100. After confirming that the time setting of the electronic device 100 enters the preset time period, the time period management unit 430 outputs the fourth status signal D to the power supply module 510. The power supply module 510 stops outputting the charging voltage X after receiving the fourth status signal D and additionally outputs the operating voltage Y with a lower level to the charging module 530. As such, the time period management unit 430 reduces the output voltage of the power supply module 510 and the waste heat generated by the charging module 530 during the preset time period.

In a different embodiment, the time period management unit 430 can also instruct the power supply module 510 to cut off the connection with the external power source and stop the output at the same time after the time setting of the electronic device 100 is confirmed to enter the preset time period. The voltage is applied to the charging module 530. In this way, the time period management unit 430 can reduce the power supply burden of the external power source to the area by cutting off the connection between the power supply module 510 and the external power source. Therefore, after entering the power-limiting period in a specific area, the period management unit 430 can be used to cut off the connection between the plurality of electronic devices 100 in the area and the external power source to achieve the collective energy-saving and carbon-reducing effect.

In addition, in the embodiment shown in FIG. 3, the time period management unit 430 outputs the fourth status signal D according to the time setting of the electronic device 100, but is not limited thereto; in different embodiments, the time period management unit 430 may also be based on itself. The included time setting selectively outputs the fourth status signal D to the power supply module 510.

FIG. 4 shows another variation of the electronic device 100 having the power management function of the present invention. In this embodiment, the power supply module 510 includes a charging voltage module 511 , an operating voltage module 512 , and a switching module 513 . In this embodiment, the charging voltage module 511 and the working voltage module 512 are respectively configured to output the charging voltage X and the operating voltage Y with a lower voltage level to the switching module 513. On the other hand, the switching module 513 selects the voltages output to the system voltage module 520 and the charging module 530 according to the status signals output by the state detecting module 400. The switching module 513 will output the charging voltage X to the charging module 530 and the system voltage module 520 and stop outputting the working voltage module 512 when the first state signal A is received (when the power storage state is not full). Working voltage Y.

On the other hand, the switching module 513 will output the operating voltage Y to the charging module 530 and the system voltage module 520 when the second status signal B is received (when the power storage state is full). However, in different embodiments, the switching module 513 can selectively stop continuously outputting the voltage to the charging module 530 and the system voltage module 520 according to the power storage state.

In addition, in the above embodiment, the power supply module selectively outputs two different levels of voltage to the system according to the operating state of the electronic device 100 according to the temperature or set time of the electrical energy storage module 300 or the electronic device 100. The voltage module 520 and the charging module 530 are not limited thereto; in different embodiments, the power supply module can also adjust the output voltage according to the temperature or electrical energy storage state of the electrical energy storage module 300 or the electronic device 100 or other operating states. The level of it. In other words, the power supply module can output two or more voltages having different levels to the system voltage module 520 and the charging module 530 according to the state of the power storage module 300 or the electronic device 100.

FIG. 5 is a flow chart of the power management method of the present invention. As shown in FIG. 5, the power management method includes a step S800, detecting an electrical energy storage state of the electrical energy storage module, and step S810, outputting a first state signal or a second state signal according to the electrical energy storage module. In this embodiment, the power management method uses a state detection module to detect the power storage state of the power storage module. In addition, the power management method further controls the state detection module to control the output of the first state signal when the power storage module is in an unfilled state, to notify the back power supply module that the power storage module needs a higher input voltage for charging. action. On the other hand, the power management method outputs a second status signal when the control state detection module detects that the power storage state is in a full state, to notify the power supply module to reduce the voltage output to the charging module. At this point, the charging module will enter the standby state.

In addition, the power management method further includes a step S820, outputting a charging voltage according to the first state signal or outputting the working voltage according to the second state signal to the charging module and the system voltage module, and step S830, and controlling the charging module to receive the charging voltage The energy storage module is charged. In the embodiment shown in FIG. 5, the power management method adjusts the voltage outputted by the power supply module to the charging module according to the power storage state of the power storage module. After receiving the first status signal (the power storage module is not fully charged), the power supply module outputs a higher level charging voltage to the charging module for the charging module to charge the energy storage module according to the charging voltage. Charge it. On the other hand, the power supply module will output the working voltage to the charging module after receiving the second status signal (the power storage module is in a full state), and the charging module will enter the standby state, and the working voltage is at this time. The operating system voltage module will provide better power conversion efficiency and reduce waste heat generation.

FIG. 6 is a flow chart showing another embodiment of the power management method of the present invention. The power management method shown in FIG. 6 further includes step S900, setting a preset time period and step S910, detecting the time setting. In this embodiment, the power management method may define the preset time period according to the power limiting period and continuously detect the time setting of the electronic device corresponding to the power storage module. In addition, the power management method shown in FIG. 6 will continue to compare the preset time period and the time setting of the electronic device. When the time setting reaches the preset time period, the power management method proceeds to step S920 to stop the output voltage or switch the output working voltage to the power storage module and the system voltage module.

In this embodiment, steps S900-S920 are related to reducing the voltage level output by the power supply module in a certain period of time to reduce the waste heat generated by the system voltage module. The power management method can continuously detect the time setting of the electronic device. After confirming that the time setting of the electronic device enters the preset time period, the power management method will control the time period management unit to output the status signal to the power supply module. After receiving the status signal, the power supply module stops outputting the charging voltage and simultaneously outputs the working voltage with a lower level to the charging module and the system voltage module. In this way, the time management unit can reduce the output voltage of the power supply module and the waste heat generated by the charging module and the system voltage module during the preset time period.

FIG. 7 is a flow chart of another embodiment of a power management method according to the present invention. The power management method shown in FIG. 7 further includes a step S1000, setting a preset temperature, and step S1010, detecting a temperature of the electronic device or the electrical energy storage module. In this embodiment, the power management method controls the temperature detecting unit to continuously detect the temperature of the power storage module or the electronic device. When it is determined that one of the above components is higher than the first preset value or lower than the second preset value, the power management method proceeds to step S920 to stop the output voltage or switch the output operating voltage to the charging module and the system voltage mode. The group can reduce the waste heat generated by the electronic device or the charging module and the system voltage module and avoid overheating or prevent the electronic device from operating under the minimum normal operating temperature of the product design to produce unpredictable results.

While the foregoing description of the preferred embodiments of the invention, the embodiments of the invention The spirit and scope of the principles of the invention. Modifications of the various forms, structures, arrangements, ratios, materials, components and components may be employed by those skilled in the art. Therefore, the embodiments disclosed herein are to be considered as illustrative and not restrictive. The scope of the present invention is defined by the scope of the appended claims, and the legal equivalents thereof are not limited to the foregoing description.

100. . . Electronic device

300. . . Electric energy storage module

400. . . State detection module

410. . . Power detection unit

420. . . Temperature detection unit

430. . . Time management unit

510. . . Power supply module

511. . . Charging voltage module

512. . . Working voltage module

520. . . System voltage module

530. . . Charging module

A. . . First state signal

B. . . Second status signal

C. . . Third state signal

D. . . Fourth state signal

X. . . Charging voltage

Y. . . Operating Voltage

513. . . Switching module

1 is a schematic diagram of an electronic device having a power management function according to the present invention;

2 is a schematic diagram of another embodiment of an electronic device having a power management function according to the present invention;

3 is a schematic diagram of another embodiment of an electronic device having a power management function according to the present invention;

4 is another modified embodiment of an electronic device having a power management function according to the present invention;

Figure 5 is a flow chart of the power management method of the present invention;

6 is a flow chart of another embodiment of a power management method according to the present invention;

FIG. 7 is a flow chart of another embodiment of a power management method according to the present invention.

100‧‧‧Electronic devices

300‧‧‧Electric energy storage module

400‧‧‧State Detection Module

410‧‧‧Power detection unit

510‧‧‧Power supply module

520‧‧‧System Voltage Module

530‧‧‧Charging module

A‧‧‧First status signal

B‧‧‧Second state signal

X‧‧‧Charging voltage

Y‧‧‧ working voltage

Claims (16)

A power management system for an electronic device, wherein the power management system includes: an electrical energy storage module for powering the electronic device; and a state detection module coupled to the electrical energy storage module for detecting The power storage module is configured to selectively output a first state signal or a second state signal according to the power storage state; a power supply module is connectable to the state detector The power supply module can selectively output at least one charging voltage or one working voltage, wherein the power supply module outputs the charging voltage when receiving the first state signal or receives the second state And outputting the working voltage, wherein the charging voltage is greater than the working voltage; a charging module is connected to the power supply module to receive the charging voltage or the working voltage, wherein the charging module receives the charging voltage Charging the electrical energy storage module; and a system voltage module for receiving the output voltage of the power supply module or the output voltage of the electrical energy storage module In other internal components of the rated voltage to drive the electronic device and the power supply so that the work of the electronic device. The power management system of claim 1, wherein the power supply module selectively outputs at least the charging voltage or the operating voltage to the system voltage module, wherein the power supply module will receive the The first state signal outputs the charging voltage to the system voltage module or outputs the operating voltage to the system voltage module when the second state signal is received, wherein the charging voltage is greater than the operating voltage. The power management system of claim 1, wherein the electrical energy storage state is When the state is not full, the state detecting module outputs the first state signal. When the power storage state is full, the state detecting module outputs the second state signal. The power management system of claim 1, wherein the state detection module includes a temperature detecting unit for detecting a temperature of the electronic device or the electrical energy storage module, and the temperature is higher than the temperature And outputting a third status signal to the power supply module when a first preset value or lower than a second preset value. The power management system of claim 1, wherein the state detection module includes a time period management unit having a predetermined time period and detecting a time setting of the electronic device, wherein the time management unit is to be When the time setting reaches the preset time period, a fourth status signal is outputted to the power supply module, and the power supply module stops the output voltage corresponding to the fourth status signal to the charging module and the system voltage module or switches the output. The working voltage is applied to the charging module and the system voltage module. The power management system of any of the preceding claims, wherein the power supply module comprises: a charging voltage module for generating the charging voltage; and a working voltage module for generating the working voltage And a switching module connected to the charging voltage module, the working voltage module, the charging module, the system voltage module and the state detecting module, wherein the switching module detects the state according to the state The status signals output by the module switch the voltage output to the charging module and the voltage module of the system or stop the output voltage to the charging module and the system voltage module. An electronic device can be connected to a power supply module, wherein the power supply module can selectively output at least one charging voltage or an operating voltage, and includes: an electrical energy storage module for supplying power to operate the electronic device; a state detection module is connected to the electrical energy storage module to detect an electrical energy storage state of the electrical energy storage module, wherein the state detection module outputs a first state signal or a first according to the electrical energy storage state a second state signal; a charging module connected to the power supply module to receive the charging voltage or the working voltage, wherein the charging module charges the power storage module when receiving the charging voltage; wherein the power source The power supply module can be connected to the charging module and connected to the state detecting module, and the power supply module can selectively output at least one charging voltage or a working voltage to the charging module, where the power supply module is Receiving the first state signal, outputting the charging voltage to the charging module or outputting the working voltage to the charging module when receiving the second state signal, wherein the charging module The voltage system is greater than the operating voltage; and a system voltage module is configured to receive the output voltage of the power supply module or the output voltage of the electrical energy storage module is converted into a voltage rating for driving an internal component of the electronic device and to supply the electronic device jobs. The electronic device of claim 7, wherein the power supply module selectively outputs at least the charging voltage or the operating voltage to the system voltage module, wherein the power supply module will receive the first When the state signal is received, the charging voltage is output to the system voltage module or when the second state signal is received, the charging voltage is output to the system voltage module, wherein the charging voltage is greater than the operating voltage. The electronic device of claim 7, wherein when the electrical energy storage state is charging When the time is full, the state detecting module outputs the first state signal. When the power storage state is not full, the state detecting module outputs the second state signal. The electronic device of claim 7, wherein the state detecting module includes a temperature detecting unit for detecting a temperature of the electronic device or the electrical energy storage module, and the temperature is higher than one The third state signal is output to the power supply module when the first preset value is lower than a second preset value. The electronic device of claim 7, wherein the state detection module includes a time period management unit having a predetermined time period and detecting a time setting of the electronic device, wherein the time management unit is at the time When the preset time period is reached, a fourth state signal is outputted to the power supply module, and the power supply module stops outputting the voltage to the charging module and the system voltage module or switches the output corresponding to the fourth state signal. Voltage to the charging module and system voltage module. The electronic device of any one of claims 7-8, wherein the power supply module comprises: a charging voltage module for generating the charging voltage; and a working voltage module for generating the operating voltage; And a switching module connected to the charging voltage module, the working voltage module, the charging module, the system voltage module and the state detecting module, wherein the switching module detects the mode according to the state The status signals outputted by the group switch the voltage output to the charging module and the voltage module of the system or stop the output voltage to the charging module and the system voltage module. An electric energy management method is applied to an electronic device having an electrical energy storage module, comprising the steps of: detecting an electrical energy storage state of the electrical energy storage module; and outputting a first state signal or a second according to the electrical energy storage state a status signal; outputting a charging voltage according to the first status signal or outputting an operating voltage to the charging module according to the second status signal, wherein the charging voltage is greater than the working voltage; and the charging module receives the charging voltage Charging the power storage module; and outputting the charging voltage to a system voltage module according to the first state signal or outputting the working voltage to the system voltage module according to the second state signal, wherein the system voltage module is used Receiving the power supply module output voltage or the electrical energy storage module output voltage is converted into a rated voltage for driving an internal component of the electronic device and supplying power to operate the electronic device. The power management method of claim 13, wherein the status signal outputting step comprises: outputting the first status signal when the power storage status is full; and when the power storage status is not full, The second status signal is output. The power management method of claim 13, further comprising: detecting a temperature of the electronic device or the electrical energy storage module; wherein the temperature is higher than a first preset value or lower than a second preset And outputting the third state signal; and correspondingly, the third state signal stops outputting the voltage to the charging module and the system voltage mode The group or switch outputs the working voltage to the charging module and the system voltage module. The power management method of claim 13, further comprising: setting a preset time period; detecting a time setting of the electronic device; and outputting a fourth status signal when the preset time period is reached; Corresponding to the fourth state signal, the output voltage is stopped to the charging module and the system voltage module or the operating voltage or charging voltage is switched to the charging module and the system voltage module.