CN102222943A - Power management system and portable electronic device with power management system - Google Patents

Abstract

A power management system installed in a portable electronic device, the power management system includes a power supply device, a detection module and an output power control module, the power supply device includes a battery, a charging control device electrically connected to the battery Chip and a power input module, the detection module includes a core chip, the core chip is electrically connected to the battery, the power input module and the output power control module, the core chip is provided with an overcurrent protection point corresponding to the power supply device, When detecting that the output current of the power supply device exceeds the overcurrent protection point, the core chip triggers the output power control module to reduce the operating frequency of the portable electronic device, so as to reduce the output current of the battery or the power input module. The present invention also provides a portable electronic device with the above-mentioned power management system.

Description

Power management system and portable electronic device with power management system

technical field

The present invention relates to a power management system, in particular to a power management system for a portable electronic device such as a portable computer and a portable electronic device with the power management system.

Background technique

The power supply device of a portable electronic device such as a portable computer generally includes a battery and a power output module carried by itself, so that the portable computer can provide power through the battery, and can also be connected to an external power supply through the power input module. As people have higher and higher performance requirements for portable computers, the power required for the work of components such as the built-in core processor and display chip of the portable computer is also higher and higher, and when the hard disk and optical drive of the portable computer When components such as interfaces and interfaces are under heavy load conditions, the power supply device may automatically enter self-protection mode due to reasons such as being unable to provide a large energy load for a long time or being in a high-power working state for a long time, resulting in overheating, etc. The laptop computer is powered to automatically shut down the laptop computer.

Contents of the invention

In view of the above circumstances, it is necessary to provide a power management system that can enable the power supply device of the portable electronic device to supply power normally.

In addition, it is also necessary to provide a portable electronic device with the above-mentioned power management system.

A power management system installed in a portable electronic device, the power management system includes a power supply device, a detection module and an output power control module, the power supply device includes a battery, a charging control device electrically connected to the battery Chip and a power input module, the detection module includes a core chip, the core chip is electrically connected to the battery, the power input module and the output power control module, the core chip is provided with an overcurrent protection point corresponding to the power supply device, When detecting that the output current of the power supply device exceeds the overcurrent protection point, the core chip triggers the output power control module to reduce the operating frequency of the portable electronic device, so as to reduce the output current of the battery or the power input module.

A portable electronic device, which includes a working circuit and a power management system installed in the portable electronic device, the power management system includes a power supply device for supplying power to the working circuit, a detection module and an output Power control module, the power supply device includes a battery, a charging control chip electrically connected to the battery and a power input module, the charging control chip is used to control the charging current of the battery, the detection module includes a core chip, The core chip is electrically connected to the battery, the power input module and the output power control module, and the output power control module is also electrically connected to the working circuit. The core chip corresponds to the battery and the power input module. Protection point, when it is detected that the output current of the power supply device exceeds the corresponding over-current protection point, the core chip triggers the output power control module to reduce the operating frequency of the portable electronic device, so as to reduce the output current of the battery or power input module.

Compared with the conventional technology, the portable electronic device with a power management system uses a detection module to respectively detect whether the output current of the battery and the power input module when supplying power to the working circuit exceeds its corresponding overcurrent protection point, And by reducing the working frequency of the working circuit to reduce the output current of the battery and the power input module, the normal operation of the power supply device can be ensured, thereby preventing it from directly entering the self-protection mode and causing automatic shutdown.

Description of drawings

FIG. 1 is a functional block diagram of a portable electronic device with a power management system provided by a preferred embodiment of the present invention.

Explanation of main component symbols

Laptop 200

Power Management System 100

Power supply unit 10

Battery 11

Charging control chip 12

Power input module 13

Detection module 30

Detection resistor 31

Core chip 33

Output power control module 50

Working Circuit 70

Detailed ways

Please also refer to FIG. 1 , the power management system 100 provided by the embodiment of the present invention can be installed in a portable electronic device such as a conventional laptop computer 200 , and is used to supply power to the working circuit 70 in the laptop computer 200 . The power management system 100 includes a power device 10 , a detection module 30 and an output power control module 50 . The detection module 30 is electrically connected to the power supply device 10 and the output power control module 50 , and the output power control module 50 is also electrically connected to the working circuit 70 .

The power supply device 10 includes a battery 11 , a charging control chip 12 electrically connected to the battery 11 , and a power input module 13 , and both the battery 11 and the power input module 13 are electrically connected to the detection module 30 . The battery 11 can directly supply power to the portable computer 200 , its working current can change correspondingly with the electric energy stored inside it, and has a limited maximum output current. The charging control chip 12 is an existing battery charging control integrated circuit, which has an input current limiting function for controlling the charging current of the battery 11 . In this embodiment, the charging control chip 12 can detect the output current of the power supply device 10, and preset a current control point corresponding to the output current of the power supply device 10, when it is detected that the output current of the power supply device 10 exceeds the current control point , the charging current of the battery 11 is reduced. In this embodiment, the power input module 13 is a power adapter, which can convert the external power supply into the voltage required by the laptop computer 200 and input it to the laptop computer 200 as a working power supply, and can also supply power to the battery 11 at the same time. Charge.

The detection module 30 includes a detection resistor 31 and a core chip 33 . The detection resistor 31 is electrically connected to the battery 11, the charging control chip 12, the power input module 13 and the core chip 33, and the core chip 33 is also electrically connected to the output power control module 50. The charging control chip 12 The output current of the power supply device 10 is detected by measuring the current on the detection resistor 31 .

The core chip 33 is an existing current detection chip, which has an input current detection function and is used to measure the current on the detection resistor 31 , which is the output current of the battery 11 or the power input module 13 . The core chip 33 presets an overcurrent protection point respectively corresponding to the output currents of the battery 11 and the power input module 13 . The overcurrent protection point is larger than the current control point of the charging control chip 12, and the overcurrent protection point of the battery 11 is preset on the premise that it does not exceed the maximum output current of the battery 11. The overcurrent protection of the power input module 13 The point is preset on the premise that the rated current of the power input module 13 is not exceeded. When the core chip 33 detects that the current on the detection resistor 31 (that is, the output current of the power supply device 10 ) exceeds its corresponding overcurrent protection point, the core chip 33 will send a signal to trigger the output power control module 50 .

The output power control module 50 is used to control the power output of the working circuit 70 . When the output power control module 50 receives the trigger signal sent by the core chip 33, it will control the working circuit 70 to enter the power saving mode and reduce the power. Correspondingly, the power supply device 10 will not need a larger power output, By reducing the output current to less than the corresponding overcurrent protection point, the power supply device 10 can continue to work normally in the power saving mode, thereby preventing it from directly entering the self-protection mode and causing automatic shutdown.

In this implementation manner, the working circuit 70 may include a CPU, a hard disk, a memory, and the like. By reducing the working frequency of the CPU, hard disk and memory, the portable computer 200 works in the power saving mode. In this embodiment, under the control of the output power control module 50, the working circuit 70 reduces the operating frequency of the CPU to achieve the power saving mode without affecting the normal operation of the hard disk and memory, so that the power supply device 10 The output current is lower than its over-current protection point, so as to ensure that the power supply device 10 continues to work normally in the power-saving mode, thereby preventing it from directly entering the self-protection mode and causing automatic shutdown.

When using the power management system 100, the battery 11 or the power input module 13 supplies power to the portable computer 200. When the charging control chip 12 detects that the current output by the power supply device 10 exceeds the current control point of the charging control chip 12, The charging current of the battery 11 will be reduced to reduce the output current of the power supply device 10 . And if the charging current of the battery 11 is zero, and when the core chip 33 detects that the current output by the power supply device 10 exceeds its corresponding overcurrent protection point, the core chip 33 will trigger the output power control module 50, and then the output power control module 50 will Control the working circuit 70 to be in the power-saving mode to reduce the output current of the power input module 13, ensure the normal operation of the power supply device 10 in the power-saving mode, and prevent it from directly entering the self-protection mode to cause automatic shutdown.

The power management system 100 uses a detection module 30 to detect the output current of the battery 11 and the power input module 13 respectively, and reduces the charging current of the battery 11 through the charging control chip 12 or controls the charging current through the core chip 33 The output power control module 50 adjusts and lowers the operating frequency of the working circuit 70 to reduce the output current of the battery 11 and the power input module 13, so as to ensure the normal power supply of the battery 11 and the power input module 13, and prevent them from directly entering into self-protection mode and cause automatic shutdown.

It can be understood that the power management system 100 can also be used in other portable electronic devices to ensure the normal operation of the portable electronic devices.

In addition, those skilled in the art can also make various modifications, additions and substitutions in other forms and details within the scope and spirit disclosed in the claims of the present invention. Certainly, the various modifications, additions, substitutions and other changes made according to the spirit of the present invention shall all be included within the scope of protection claimed by the present invention.

Claims (11)

1. power-supply management system; be installed in the portable electron device; this power-supply management system comprises a supply unit; this supply unit comprises a battery and a Power Entry Module; it is characterized in that: described supply unit also comprises a charge controlling chip that electrically connects with battery; described charge controlling chip is in order to the charging current of control battery; described power-supply management system also comprises a detecting module and a power output control module; described detecting module comprises an acp chip; described acp chip and battery; Power Entry Module and power output control module all electrically connect; corresponding described battery of described acp chip and Power Entry Module are respectively equipped with overcurrent protection point; when the electric current that detects supply unit output exceeds corresponding overcurrent protection point; described acp chip triggers the operating frequency that the power output control module reduces portable electron device, to reduce the output current of battery or Power Entry Module.

2. power-supply management system as claimed in claim 1, it is characterized in that: the output current of described charge controlling chip corresponding power device is preset Current Control point, described Current Control point is little than overcurrent protection point, when the electric current that detects supply unit output when charge controlling chip exceeds Current Control point, reduce the charging current of battery; If battery charge is decreased to zero, when the acp chip electric current that detects supply unit output exceeded corresponding overcurrent protection point simultaneously, then acp chip triggered the operating frequency of power output control module reduction portable electron device.

3. power-supply management system as claimed in claim 2, it is characterized in that: described detecting module also comprises a detecting resistance that all electrically connects with battery, charge controlling chip and Power Entry Module, described acp chip is by detecting resistance and described battery and Power Entry Module electric connection, and described acp chip and charge controlling chip are all measured the output current of supply unit by measuring the ohmically electric current of detecting.

4. power-supply management system as claimed in claim 1 is characterized in that: described acp chip is the overcurrent protection point of default this Power Entry Module of prerequisite with the rated current that does not exceed described Power Entry Module.

5. power-supply management system as claimed in claim 1 is characterized in that: described charge controlling chip is the overcurrent protection point of the default described battery of prerequisite with the maximum output current that does not exceed battery.

6. power-supply management system as claimed in claim 1 is characterized in that: described Power Entry Module is an adapter, in order to external power source is converted to the required rated voltage of portable electron device.

7. portable electron device; it comprises an operating circuit and a power-supply management system; described power-supply management system comprises that one is used to the supply unit of operating circuit power supply; this supply unit comprises a battery and a Power Entry Module; it is characterized in that: described supply unit also comprises a charge controlling chip that electrically connects with battery; described charge controlling chip is in order to the charging current of control battery; described power-supply management system also comprises a detecting module and a power output control module; described detecting module comprises an acp chip; described acp chip and battery; Power Entry Module and power output control module all electrically connect; described power output control module and operating circuit also electrically connect; corresponding battery of described acp chip and Power Entry Module are preset with overcurrent protection point respectively; when the electric current that detects supply unit output exceeds corresponding overcurrent protection point; described acp chip triggers the operating frequency that the power output control module reduces portable electron device, to reduce the output current of battery or Power Entry Module.

8. portable electron device as claimed in claim 7, it is characterized in that: the output current of described charge controlling chip corresponding power device is preset Current Control point, described Current Control point is little than overcurrent protection point, when the electric current that detects supply unit output when charge controlling chip exceeds Current Control point, reduce the charging current of battery; If battery charge is decreased to zero, when the acp chip electric current that detects supply unit output exceeded corresponding overcurrent protection point simultaneously, then acp chip triggered the operating frequency of power output control module reduction operating circuit.

9. portable electron device as claimed in claim 8, it is characterized in that: described detecting module also comprises a detecting resistance that all electrically connects with battery, charge controlling chip and Power Entry Module, described acp chip is by detecting resistance and described battery and Power Entry Module electric connection, and described acp chip and charge controlling chip are all measured the output current of supply unit by measuring the ohmically electric current of detecting.

10. portable electron device as claimed in claim 7 is characterized in that: described acp chip is the overcurrent protection point of default this Power Entry Module of prerequisite with the rated current that does not exceed described Power Entry Module.

11. portable electron device as claimed in claim 7 is characterized in that: described acp chip is the overcurrent protection point of the default described battery of prerequisite with the maximum output current that does not exceed battery.

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