Patent Application
20110254510
1. Field of the Invention
The present invention relates to an intermittently outputted power supply system and, more particularly, to an intermittently outputted power supply system capable of converting an input power source with small power into an output power source with high power, which is outputted intermittently.
2. Description of Related Art
In the 3C market, miscellaneous kinds of consumer electronic devices are provided for the 3C consumers to choose with, along with the progressing of technology, such as a laptop computer, a mobile phone, and a portable audio player. Further, these consumer electronic devices contain more and more functions, in order to meet the increasing demands of the 3C consumers. However, every kind of the consumer electronic devices must be supplied with a power source. Thus, the efficiency of the battery applied in these consumer electronic products is always concern by the 3C consumers. For example, the information related to increase the efficiency of the battery, to extend the lifetime of the battery, and to raise the charging efficiency of the battery, etc.
With the above description, it is easy to find that the power providing ability of the conventional portable power supply system is limited with the power value of the secondary battery 13, and the conventional portable power supply system is unable to output a power source with higher power to the electronic product continuously. Moreover, since the power source with higher power is provided by continuously converting the power value stored in the secondary battery 13, the stability of the outputted power source thereof is worse and easily effected by the remaining power value of the secondary battery 13. For example, once only an extremely low power value is remained in the secondary battery, the voltage of the outputted power source with higher power will drift away from a target voltage, which will deteriorate the operating stability of the electronic product connected with the conventional portable power supply system.
The object of the present invention is to provide an intermittently outputted power supply system capable of converting a first power into a second power being outputted intermittently, wherein the voltage of the second power is greater than the voltage of the first power.
To achieve the object, the intermittently outputted power supply system of the present invention comprises a power source input unit for inputting a first power; a charging control circuit unit coupled with the power source input unit, wherein the charging control circuit unit includes a first converting circuit; an energy-stored unit coupled with the charging control circuit unit, for being charged by the charging control circuit unit, wherein an energy provided by the first power is stored in the energy-stored unit, by the charging control circuit unit; a discharging control circuit unit coupled with the energy-stored unit, wherein the discharging control circuit unit includes a pulse discharging control circuit unit and a second converting circuit, the energy stored in the energy-stored unit is converted into a second power by the discharging control circuit unit, and the second power is outputted intermittently, wherein the voltage of the second power is greater than the voltage of the first power; and a power source output unit coupled with the discharging control circuit unit, wherein the power source output unit charges an electronic device with the intermittently outputted second power .
Wherein, the charging control circuit unit charges the energy-stored unit continuously, for increasing the power value of the energy-stored unit. In addition, when the power value of the energy-stored unit is equal to or greater than a discharging threshold or the charging period is achieving a predetermined value, the discharging control circuit unit controls the energy-stored unit to discharge at a discharging rate rapidly, making the power source output unit to output the second power. Then, once the power value of the energy-stored unit is equal to or smaller than a charging threshold, the charging control circuit unit starts to charge the energy-stored unit, for increasing the power value of the energy-stored unit once again, until the energy-stored unit to be discharged again rapidly.
As a result, since the power source input unit of the intermittently outputted power supply system of the present invention receives a first power (not shown in the figure), and the charging control circuit unit charges the energy-storing unit continuously. Besides, the a charging control circuit unit controls the output frequency of the second power output from the power source output unit, depending on the pulse discharging control circuit unit embedded therein. Therefore, the intermittently outputted power supply system of the present invention can output an output power intermittently, wherein the power of the output power is greater than the power of the input power received by the intermittently outputted power supply system of the present invention. In different designs of the products, the voltage of the output power can be greater than that of the input power.
Moreover, the intermittently outputted power supply system of the present invention can further comprise a control element, which is used to detect the power value of the energy-stored unit. The formation of the control element is not limited; it can be any kind of suitable element, such as a power value detecting circuit. In addition, any element capable of detecting the power value can be applied in the intermittently outputted power supply system of the present invention. Besides, the aforementioned first converting circuit and the second converting circuit is a DC-to-DC converter, for converting power in the intermittently outputted power supply system of the present invention.
It should be notice that, in the intermittently outputted power supply system of the present invention; the power source input unit can be a USB port or an inserting hole corresponding to the adapter of the mobile phone. Besides, the power source output unit can be a USB port or an adapter plug corresponding to an inserting hole of a laptop computer. In addition, the power source input unit is preferably a USB port, while the power source output unit is preferably an adapter plug corresponding to an inserting hole of a laptop computer. Moreover, the energy-stored unit can be a capacitor or a secondary battery having a high charging rate and/or discharging rate. On the hand, the formation of the DC-DC converter included by the charging control circuit unit and the discharging control circuit unit is not limited; any circuit module capable of converting voltage can be applied in the charging control circuit unit and the discharging control circuit unit of the intermittently outputted power supply system of the present invention.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
The intermittently outputted power supply system of the present invention is used to convert a first power into a second power, for example, converting a first power used for charging a mobile phone into a second power for the usage of an electronic device, such as charging the embedded battery of a laptop computer. In different designs of the products, the power of the second power can be greater than that of the first power, or the voltage of the second power can be larger than that of the first power.
With reference to
The intermittently outputted power supply system of the present invention can further comprise a control element 25, which is coupled with the charging control circuit unit 22, the energy-stored unit 23, and the discharging control circuit unit 24. The control element 25 is used to detect the power value of the energy-stored unit 23. The formation of the control element 25 is not limited; it can be any kind of suitable element, such as a power value detecting circuit. As a result, any element or circuit capable of detecting the power value can be applied in the intermittently outputted power supply system of the present invention.
In addition, as shown in
On the other hand, please refer to
When the intermittently outputted power supply system of the present invention is operating, the charging control circuit unit 22 charges the energy-stored unit 23 continuously with the first power from the power source input unit 21, for increasing the power value of the energy-stored unit 23. In the present embodiment, the energy-stored unit 23 has a high charging rate, which is between 5 C and 20 C.
When the power value of the energy-stored unit 23 is equal to or greater than a discharging threshold Tdischarge or the charging period is equal to or longer than a predetermined period, the discharging control circuit unit 24 controls the energy-stored unit 23 to discharge at a discharging rate rapidly. In the present embodiment, the aforementioned discharging threshold is between 95% and 99.5% of the maximum power value of the energy-stored unit 23, while the discharging rate is between 5 C and 20 C.
Thus, the power source output unit 26 of the intermittently outputted power supply system of the present invention outputs the second power intermittently. The second power can be a DC power having the voltage between 15 and 25 volt and the current between 3 and 5 ampere. In addition, the power source output unit 26 is an adapter plug corresponding to an inserting hole of a laptop computer, for providing the second power to a laptop computer, such as charging the embedded battery of the laptop computer. In different designs of the products, the power source output unit 26 can be connected with the power inserting hole or USB port, but the scope of the present invention is not thus limited.
After the energy-stored unit 23 being discharged, the power value thereof decreases rapidly. Once the power value of the energy-stored unit 23 is equal to or smaller than a charging threshold Tcharge, the charging control circuit unit 22 starts to charge the energy-stored unit 23, for increasing the power value of the energy-stored unit 23 once again, until the energy-stored unit 23 to be discharged again rapidly. In the present embodiment, the aforementioned charging threshold is between 2% and 0.5% of the maximum power value of the energy-stored unit 23.
The discharging control circuit unit 24 further comprises a switch (not shown in the figure). The switch is mainly used for preventing the flowing back of the electric energy, which is from the electronic device toward the energy-stored unit 23, as the voltage of the energy-stored unit 23 being smaller than the voltage of the battery of the electronic device after the energy-stored unit 23 being discharged. Therefore, the switch of the discharging control circuit unit 24 can be a MOS switch, for preventing the electric energy being transmitted to the energy-stored unit.
As a result, since the power source input unit of the intermittently outputted power supply system according to first embodiment of the present invention receives a first power, and the charging control circuit unit charges the energy-storing unit continuously. The control element then controls the output frequency of the second power output from the power source output unit, depending on the capacity of the battery of the energy-storing unit and the pulse discharging control circuit unit. Thus, the intermittently outputted power supply system according to first embodiment of the present invention can output an output power having a steady output voltage intermittently, wherein the power of the output power is greater than the voltage of the input power. As a result, the intermittently outputted power supply system of the present invention can charge a larger-sized electronic device by a first power outputted from an adapter of a smaller-sized electronic device, enabling the user to charge the larger-sized electronic device without the need to bring more adapters with him/her.
Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
This application claims the benefit of filing date of U.S. Provisional Application Ser. No. 61/1325,822, entitled “Pulse output method to let smaller output power source” filed on Apr. 20, 2010 under 35 USC §119(e)(1).
| Number | Date | Country | |
|---|---|---|---|
| 61325822 | Apr 2010 | US |
