CN102938569A - Method and device for supplying power to electronic device and electronic device - Google Patents
Method and device for supplying power to electronic device and electronic device Download PDFInfo
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- CN102938569A CN102938569A CN2011102334361A CN201110233436A CN102938569A CN 102938569 A CN102938569 A CN 102938569A CN 2011102334361 A CN2011102334361 A CN 2011102334361A CN 201110233436 A CN201110233436 A CN 201110233436A CN 102938569 A CN102938569 A CN 102938569A
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Abstract
The invention provides a method and a device for supplying power to an electronic device and the electronic device. The power supply method comprises the steps of supplying power to the electronic device by means of a battery through a first access; detecting electric parameters of the battery in the process of supplying power to the electronic device by means of the battery through the first access; judging whether the electric parameters meet first predetermined conditions and generating a first judgment result; and when the first judgment result shows that the electric parameters meet the first predetermined conditions, supplying power to the electronic device by means of the battery through a second access, wherein the first access is different from the second access. By means of the power supply method, capacity of the battery can be fully utilized, and service life of the battery can be effectively prolonged.
Description
Technical field
The present invention relates to the power supply of electronic equipment, and relate more specifically to a kind of method of supplying power to power electronic equipment, to electric supply installation and the electronic equipment of power electronic equipment.
Background technology
At present, the short user of becoming of the service time of battery of the electronic equipment of smart mobile phone, PAD and so on complains maximum problem.No matter be that smart mobile phone manufacturer, PAD manufacturer or battery manufacture commercial city conduct a research for the battery use of the electronic equipment such as smart mobile phone, PAD one after another.
In smart mobile phone, in answering or calling process, the pulse current very large (approximately 1.5A-2A) due to GSM, can cause falling under cell voltage, and the amplitude of falling under this cell voltage depends on the internal resistance of cell.The Lephone of Legend Company of take is example, and this cell voltage can fall down the 0.6V left and right.Usually, the operating voltage of the hardware chip in smart mobile phone is minimum is 3V.Consider under the cell voltage about above-mentioned 0.6V, more than the shutdown voltage of Lephone need to being set in to 3.6V (3+0.6V), thus, just likely guarantee the smart mobile phone normal operation; Otherwise the fault such as will likely occur crashing, restart.
Yet, for a battery, if taken full advantage of the energy content of battery, preferably can use 2.7V to cell voltage.As can be seen here, more than the shutdown voltage of Lephone is set in to 3.6V, must cause existing in the battery a large amount of dump energies.
In order to take full advantage of the energy content of battery, hope can be selected the chip that operating voltage is low, in the case, can be directly with battery to system power supply, yet, in current electronic application, the operating voltage of chip is mostly minimum is 3V, almost there is no the chip that voltage is low.
Therefore, need a kind of energy content of battery that can take full advantage of to carry out method of supplying power to and the electric supply installation to power electronic equipment.
Summary of the invention
Consider the problems referred to above and proposed the present invention.The present invention aims to provide a kind of method of supplying power to power electronic equipment and electric supply installation, and it can utilize battery capacity fully, thereby effectively extends the service time of battery.
According to an aspect of the present invention, provide a kind of method of supplying power to power electronic equipment, having comprised: utilize battery via the first path to power electronic equipment; Described utilize battery via the first path in the process of power electronic equipment, detect the electric parameter of described battery; Judge whether first predetermined condition of described electric parameter, produce the first judged result; And when described the first judged result means that described electric parameter meets described the first predetermined condition, utilize described battery via alternate path to described power electronic equipment, wherein, described the first path is different from described alternate path.
Preferably, the amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold.
Preferably, the amplitude of the voltage that the electric parameter of battery is battery output and the residual electric quantity of battery, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, and the battery dump energy value is higher than the second predetermined power threshold.
According to of the present invention in the method for supplying power to of power electronic equipment, utilize battery via the first path to before power electronic equipment, also comprise: the electric parameter that detects described battery; Judge that whether described electric parameter meets described the first predetermined condition and/or the second predetermined condition, produces the second judged result; And when described the second judged result means that described electric parameter does not meet described the first predetermined condition and described the second predetermined condition, utilize described battery via the first path to described power electronic equipment; When described the second judged result means that described electric parameter meets described the second predetermined condition and while not meeting described the first predetermined condition, utilize described battery via three-way to described power electronic equipment, wherein, described three-way is different with described alternate path from described the first path.
Preferably, the amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, described the second predetermined condition is: the amplitude of the voltage of battery output is higher than the second predetermined voltage threshold, and described the second predetermined voltage threshold is higher than described the first predetermined voltage threshold.
Preferably, the residual electric quantity that the electric parameter of battery is battery, described the first predetermined condition is: the residual electricity parameter of battery is lower than the first predetermined power threshold, described the second predetermined condition is: the residual electricity parameter of battery is higher than the 3rd predetermined power threshold, and the described second predetermined power threshold is higher than the described first predetermined power threshold.
Preferably, described the first path is: the Voltage-output that battery is exported is to described electronic equipment; Described alternate path is: the voltage of battery output is increased to the first predetermined voltage via booster circuit, and exports described the first predetermined voltage to described electronic equipment; And described three-way is: the voltage of battery output is reduced to the second predetermined voltage via reduction voltage circuit, and exports described the second predetermined voltage to described electronic equipment.
According to a further aspect in the invention, provide a kind of electric supply installation to power electronic equipment, having comprised: battery, for exporting supply power voltage; Voltage follower circuit, for the supply power voltage that receives the output of described battery and to power electronic equipment, wherein said voltage follower circuit comprises the first path and alternate path, described the first path is different from described alternate path; Detection part, for detection of the electric parameter of described battery; Decision means, for judging whether first predetermined condition of described electric parameter, and produce the first judged result, wherein, utilize battery via the first path in the process of power electronic equipment, when described the first judged result is illustrated in described electric parameter and meets described the first predetermined condition, described voltage follower circuit switches to and utilizes described alternate path to described power electronic equipment.
Preferably, described voltage follower circuit comprises: the first switch, and it is connected between the input of the output of battery and electronic equipment, and forms described the first path; Second switch, it is connected between the input of the output of battery and booster circuit; And described booster circuit, being increased to predetermined voltage for the supply power voltage by battery output, the output of this booster circuit is connected with the input of electronic equipment, and described second switch and this booster circuit form described alternate path.When described the first judged result means that described electric parameter meets described the first predetermined condition, end the first switch, and the conducting second switch.
Preferably, described voltage follower circuit comprises: the first switch, and it is connected between the input of the output of battery and electronic equipment, and forms described the first path; Second switch, it is connected between the input of the output of battery and booster circuit; Described booster circuit, be increased to predetermined voltage for the supply power voltage by battery output; And the 3rd switch, it is connected between the input of the output of described booster circuit and electronic equipment, and described second switch, described the 3rd switch and described booster circuit form described alternate path.When described the first judged result means that described electric parameter meets described the first predetermined condition, the conducting second switch, utilize the supply power voltage of described booster circuit rising battery output, and when the voltage of described booster circuit output meets the 3rd predetermined condition, end the first switch, and conducting the 3rd switch.
Preferably, described voltage follower circuit also comprises three-way, described three-way is different with described alternate path from described the first path, is reduced to the second predetermined voltage for the voltage by battery output via reduction voltage circuit, and exports described the second predetermined voltage to described electronic equipment; And the described decision means electric parameter second predetermined condition whether that also judges described battery, and produce the second judged result.When described the second judged result means that described electric parameter does not meet described the first predetermined condition and described the second predetermined condition, utilize described battery via the first path to described power electronic equipment; When described the second judged result means that described electric parameter meets described the first predetermined condition and while not meeting described the second predetermined condition, utilize described battery via alternate path to described power electronic equipment; When described the second judged result means that described electric parameter meets described the second predetermined condition and while not meeting described the first predetermined condition, utilize described battery via three-way to described power electronic equipment.
According to another aspect of the invention, provide a kind of electronic equipment, having comprised: battery, for exporting supply power voltage; A plurality of electronic devices; The power management part is described a plurality of electronic device power supply for the supply power voltage provided according to described battery; Voltage follower circuit, be arranged between described battery and described power management part, be used for receiving the supply power voltage of described battery output and partly powering to described power management, wherein, described voltage follower circuit comprises the first path and alternate path, and described the first path is different from described alternate path; Detection part, for detection of the electric parameter of described battery; Decision means, for judging whether first predetermined condition of described electric parameter, and produce the first judged result.Utilize battery via the first path in the process of power electronic equipment, when described the first judged result is illustrated in described electric parameter and meets described the first predetermined condition, described voltage follower circuit utilizes described alternate path partly to power to described power management.
The accompanying drawing explanation
Embodiments of the present invention is described in detail in conjunction with the drawings, and above and other objects of the present invention, feature, advantage will become apparent, wherein:
Fig. 1 illustrates the flow chart according to the method for supplying power to power electronic equipment of first embodiment of the invention;
Fig. 2 illustrates the schematic block diagram according to the electric supply installation to power electronic equipment of first embodiment of the invention;
Fig. 3 illustrates the example according to the circuit of the electric supply installation to power electronic equipment of first embodiment of the invention;
Fig. 4 illustrates two kinds of different operating states of the circuit shown in Fig. 3;
A kind of example implementation form that Fig. 5 illustrates the circuit in Fig. 3 with and two kinds of different operating states;
Fig. 6 illustrates the improved example to the circuit shown in Fig. 5;
Fig. 7 illustrates three kinds of different operating states of the circuit shown in Fig. 6;
Fig. 8 illustrates the flow chart according to the method for supplying power to power electronic equipment of second embodiment of the invention;
Fig. 9 illustrates the example implementation form according to the circuit of the electric supply installation to power electronic equipment of second embodiment of the invention; And
Figure 10 illustrates the electronic equipment comprised according to the electric supply installation of first embodiment of the invention and the second embodiment.
Embodiment
The method of supplying power to power electronic equipment and electric supply installation and electronic equipment according to the embodiment of the present invention are described below with reference to accompanying drawings.
At first, with reference to Fig. 1, the method for supplying power to power electronic equipment 100 according to first embodiment of the invention is described.
According to the method for supplying power to power electronic equipment 100 of the embodiment of the present invention, at step S105, start.
At step S110, utilize battery via the first path to power electronic equipment.Via this first path, directly export the voltage of battery output to described electronic equipment.
At step S120, described utilize battery via the first path in the process of power electronic equipment, detect the electric parameter of described battery.As example, the electric parameter of battery can be the amplitude of the voltage of battery output and/or the residual electric quantity of battery.
Then, at step S130, whether the electric parameter that judges described battery first predetermined condition, and produces the first judged result.
As example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition can be: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold.Alternatively, as another example, in the situation that the residual electric quantity that the electric parameter of battery is battery, described the first predetermined condition can be: the residual electric quantity of battery is lower than the first predetermined power threshold.Alternatively, as another example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output and the residual electric quantity of battery, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, and the battery dump energy value is higher than the second predetermined power threshold.
Next, at step S140, when described the first judged result means that described electric parameter meets described the first predetermined condition, utilize described battery via alternate path to described power electronic equipment, wherein, described the first path is different from described alternate path.As example, in described alternate path, the voltage of battery output is increased to the first predetermined voltage via booster circuit, and exports described the first predetermined voltage to described electronic equipment.
For example, with cell voltage, at 2.7V, between 4.2V, be changed to example, the method according to first embodiment of the invention is described.
Via the first path by the voltage (higher than 3.6V) of battery output while directly outputing to electronic equipment, detect the voltage of battery output, and the amplitude of voltage of working as the output of detected battery is during lower than 3.6V (the first predetermined voltage threshold), via booster circuit, the voltage of battery output is promoted to at least 3.6V (the first predetermined voltage), and exports it to described electronic equipment.
As another example, via the first path by the voltage (higher than 3.6V) of battery output while directly outputing to electronic equipment, detect the residual electric quantity of battery, and the residual electric quantity of working as detected battery is during lower than 70% (the first predetermined power threshold) of specified electric quantity value, via booster circuit, the voltage of battery output is promoted to at least 3.6V (the first predetermined voltage), and exports it to described electronic equipment.
As another example, via the first path by the voltage (higher than 3.6V) of battery output while directly outputing to electronic equipment, detect the voltage of battery output and the residual electric quantity of battery, and the amplitude of voltage of working as the output of detected battery is lower than the residual electric quantity of 3.6V (the first predetermined voltage threshold) and the battery that detects during higher than 20% (the second predetermined power threshold) of specified electric quantity value, via booster circuit, the voltage of battery output is promoted to at least 3.6V (the first predetermined voltage), and exports it to described electronic equipment.On the other hand, in the residual electric quantity of detected battery during lower than 20% (the second predetermined power threshold) in the specified electric quantity value, no longer carry out by boosting inverter to power electronic equipment, but can select to turn off electronic equipment.
For example, the described first predetermined power threshold can be the 50%-80% of battery specified electric quantity value, and the described second predetermined power threshold can be the 5%-20% of battery specified electric quantity value.
Finally, at step S199, according to the method for supplying power to power electronic equipment 100 of first embodiment of the invention, finish.
Although described the method for supplying power to power electronic equipment 100 according to first embodiment of the invention under the background to power electronic equipment, but it will be understood by those skilled in the art that, can be outside electronic equipment or within implement this method of supplying power to 100, not only can be in the situation that implement this method of supplying power to 100 from electronic device exterior to power electronic equipment, and can be in the situation that the power unit comprised from electronic equipment is implemented this method of supplying power to 100 to the system unit power supply in electronic equipment.Hereinafter, simple for explaining, still adopt " to power electronic equipment " this expression form.Except as otherwise noted, statement " to power electronic equipment " intention contains from outside to power electronic equipment and two kinds of situations of the power supply of the components of system as directed from power unit to electronic equipment in electronic equipment internal.
Next, with reference to Fig. 2-5, the electric supply installation to power electronic equipment 200 according to first embodiment of the invention is described.
Illustrate the schematic block diagram according to the electric supply installation to power electronic equipment 200 of first embodiment of the invention in Fig. 2.
As mentioned above, electric supply installation 200 can be used as the part of electronic equipment and is included in electronic equipment, or can be placed in the outside of electronic equipment.
Alternatively, electric supply installation 200 can partly be arranged in electronic equipment, part is positioned at electronic device exterior.For example, battery 210 is positioned at electronic device exterior, and detection part 220, decision means 230 and voltage follower circuit 240 are arranged in electronic equipment.
Described voltage follower circuit 240 comprises the first path PA and alternate path PB, and described the first path is different from described alternate path.In described the first path PA, the voltage of battery output is directly exported to described electronic equipment, and, in described alternate path PB, the voltage of battery output is increased to the first predetermined voltage via booster circuit, and export described the first predetermined voltage to described electronic equipment.
Utilize battery 210 via the first path PA in the process of power electronic equipment, when described the first judged result is illustrated in described electric parameter and meets described the first predetermined condition, described voltage follower circuit 240 switches to and utilizes described alternate path PB to described power electronic equipment.
As example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition can be: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold.Alternatively, as another example, in the situation that the residual electric quantity that the electric parameter of battery is battery, described the first predetermined condition can be: the residual electric quantity of battery is lower than the first predetermined power threshold.Alternatively, as another example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output and the residual electric quantity of battery, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, and the battery dump energy value is higher than the second predetermined power threshold.
Fig. 3 illustrates the example according to the circuit of the electric supply installation to power electronic equipment 300 of first embodiment of the invention.
Electric supply installation 300 comprises battery BATTERY, voltage comparator U2, form the PMOS transistor Q1 (the first switch) of the first path PA in voltage follower circuit, form the booster circuit U1 of the alternate path PB in voltage follower circuit and second switch (not shown) and the voltage detector L1 controlled by the enable signal En of voltage comparator U2 output.
Passing through the first path PA in the process of power electronic equipment, voltage detector L1 detects the voltage of battery output and the inverting input to voltage comparator U2 by this Voltage-output, to the in-phase input end input reference voltage Vref of voltage comparator U2 (for example, 3.6V), voltage comparator U2 compares voltage and the reference voltage Vref of battery output, and the output compare result signal.Then, this compare result signal is controlled the conduction and cut-off of transistor Q1, and controls on the contrary the conduction and cut-off of second switch.
As shown in (A) in Fig. 4, at the voltage of battery output during higher than reference voltage Vref, the compare result signal of voltage comparator U2 output is low level, make thus PMOS transistor Q1 conducting, and make not conducting of second switch, that is,, not by the voltage of booster circuit U1 rising battery output, make thus via transistor Q1 the voltage of battery output is directly outputed to electronic equipment.
On the other hand, as shown in (B) in Fig. 4, at the voltage of battery output during lower than reference voltage Vref, the compare result signal of voltage comparator U2 output is high level, make thus PMOS transistor Q1 cut-off, and make the second switch conducting, make thus booster circuit that the voltage of battery output is increased to the first predetermined voltage, and the Voltage-output after raising is to electronic equipment.
As example, figure 5 illustrates a kind of specific implementation form and two kinds of different operating states thereof of the circuit in Fig. 3.
As shown in (A) in Fig. 5, electric supply installation comprises the PMOS transistor Q1 (the first switch) of the first path PA in battery BATTERY, voltage comparator U2, formation voltage follower circuit, booster circuit U1 and nmos pass transistor Q2 (second switch) and the voltage detector L1 of the alternate path PB in the formation voltage follower circuit.
As shown in (B) in Fig. 5, at the voltage of battery output during higher than reference voltage Vref, the compare result signal of voltage comparator U2 output is low level, make thus PMOS transistor Q1 conducting, and make not conducting of nmos pass transistor, that is,, not by the voltage of booster circuit U1 rising battery output, make thus via transistor Q1 the voltage of battery output is directly outputed to electronic equipment.
On the other hand, as shown in (C) in Fig. 5, at the voltage of battery output during lower than reference voltage Vref, the compare result signal of voltage comparator U2 output is high level, make thus PMOS transistor Q1 cut-off, and make the nmos pass transistor conducting, make thus booster circuit that the voltage of battery output is increased to the first predetermined voltage, and the Voltage-output after raising is to electronic equipment.
Although the voltage of battery output is connected to the inverting input of voltage comparator U2 in Fig. 4 and/or Fig. 5, be connected to the in-phase input end of voltage comparator U2 with reference to voltage, realize the first switch with the PMOS transistor, with nmos pass transistor, realize second switch, but the invention is not restricted to this.Those skilled in the art can easily imagine other circuit modifications, for example, the voltage of battery output is connected to the in-phase input end of voltage comparator U2, be connected to the inverting input of voltage comparator U2 with reference to voltage, realize the first switch with nmos pass transistor, with the MMOS transistor, realize second switch.
Because the output at booster circuit U1 is set up the transit time that the first stable predetermined voltage need to be certain, and, within this transit time, the voltage of booster circuit U1 output is lower than this first predetermined voltage and likely have undesirable voltge surge.In order to address this problem, consider introducing the 3rd switch between the input of the output of booster circuit U1 and electronic equipment.Fig. 6 illustrates the improvement to the circuit shown in Fig. 5, wherein, introduces PMOS transistor Q3 between the input of the output of booster circuit U1 and electronic equipment.
Electric supply installation 600 shown in Fig. 6 comprises the PMOS transistor Q1 of the first path PA in battery BATTERY, voltage comparator U2, formation voltage follower circuit, booster circuit U1 and nmos pass transistor Q2 and PMOS transistor Q3, control circuit U3 and the voltage detector L1 of the alternate path PB in the formation voltage follower circuit.
Passing through the first path PA in the process of power electronic equipment, voltage detector L1 detects the voltage of battery output and the inverting input to voltage comparator U2 by this Voltage-output, with reference to voltage Vref (for example, 3.6V) provide to the in-phase input end of voltage comparator U2, voltage comparator U2 compares voltage and the reference voltage Vref of battery output, and the output compare result signal.
Illustrate three kinds of different operating states of the circuit shown in Fig. 6 in Fig. 7.
As shown in (A) in Fig. 7, at the voltage of battery output during higher than reference voltage Vref, the compare result signal of voltage comparator U2 output is low level, make nmos pass transistor Q2 cut-off, and make the Q1 conducting of PMOS transistor and PMOS transistor Q3 cut-off by control circuit U3, make thus via PMOS transistor Q1 the voltage of battery output is directly outputed to electronic equipment.
As shown in (B) in Fig. 7, at the voltage of battery output, during lower than reference voltage Vref, the compare result signal of voltage comparator U2 output is high level, makes nmos pass transistor Q2 conducting, the voltage that booster circuit starts to raise battery output.At the output voltage stabilization of booster circuit, before the first predetermined voltage, by control circuit U3, make PMOS transistor Q1 still maintain conducting and PMOS transistor Q3 still maintains cut-off.
As shown in (C) in Fig. 7, at the voltage of battery output during lower than reference voltage Vref, the compare result signal of voltage comparator U2 output is still high level, nmos pass transistor Q2 conducting, and the output voltage stabilization of booster circuit, at the first predetermined voltage, now, makes PMOS transistor Q1 cut-off by control circuit U3, make PMOS transistor Q3 conducting simultaneously, thereby the output voltage of booster circuit is outputed to electronic equipment.
In brief, the circuit shown in Fig. 6 and 7 has three operating states: the first operating state, wherein, from battery via the first path to power electronic equipment; The second operating state, wherein, from battery via the first path to power electronic equipment, and the voltage of booster circuit rising battery output be transitioned into gradually stable state; The 3rd operating state, wherein, the voltage the voltage of battery output being elevated to the first predetermined voltage and utilizing rising via alternate path from battery is to power electronic equipment.
The above has illustrated the method for supplying power to power electronic equipment and the electric supply installation according to first embodiment of the invention in conjunction with Fig. 1-7, wherein, in the process via the first path power supply, when the voltage that battery output detected during lower than reference voltage, the voltage of rising battery output utilize the voltage after raising to be powered in alternate path.
Yet, in the process that starts electronic equipment, still may have Similar Problems.In addition, in order to extend the service time of battery, still may provide higher cell voltage, for example,, higher than 4.2V, in the case, may not directly utilize the high voltage of battery output to carry out direct chip power supply in electronic equipment, otherwise likely burn out the chip in electronic equipment.
Next, with reference to figure 8, the method for supplying power to power electronic equipment 800 according to second embodiment of the invention is described.
At first, according to the method for supplying power to power electronic equipment 800 of the embodiment of the present invention, at step S105, start.
At step S810, detect the electric parameter of described battery.As mentioned above, the electric parameter of battery can be the amplitude of the voltage of battery output and/or the residual electric quantity of battery.
Then, at step S820, whether the electric parameter that judges described battery second predetermined condition, and produces judged result.
As example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output, described the second predetermined condition can be: the amplitude of the voltage of battery output is higher than the second predetermined voltage threshold.Alternatively, as another example, in the situation that the residual electric quantity that the electric parameter of battery is battery, described the second predetermined condition can be: the residual electric quantity of battery is higher than the 3rd predetermined power threshold.
In the situation that the judged result of step S820 means that described electric parameter does not meet described the second predetermined condition, method of supplying power to 800 advances to step S830.At step S830, whether the electric parameter that judges described battery first predetermined condition, and produces judged result.
As example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition can be: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold.Alternatively, as another example, in the situation that the residual electric quantity that the electric parameter of battery is battery, described the first predetermined condition can be: the residual electric quantity of battery is lower than the first predetermined power threshold.Alternatively, as another example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output and the residual electric quantity of battery, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, and the battery dump energy value is higher than the second predetermined power threshold.
In the situation that the judged result of step S830 means that described electric parameter does not meet described the first predetermined condition, method of supplying power to 800 advances to step S860.At step S860, utilize battery via the first path to described power electronic equipment.After this, at step S870, described utilize battery via the first path in the process of power electronic equipment, detect the electric parameter of described battery.Then, method of supplying power to 800 returns to step S830.In other words, the operation started from step S860 is identical with the operation to the method for supplying power to of power electronic equipment according to first embodiment of the invention.
In the situation that the judged result of step S820 means that described electric parameter meets described the second predetermined condition, for example, the amplitude of the voltage of battery output is scheduled to power threshold higher than the residual electric quantity of the second predetermined voltage threshold or battery higher than the 3rd, and method of supplying power to 800 advances to step S840.At step S840, utilize described battery via three-way to described power electronic equipment, wherein, described the first path is different from described three-way.As example, in described three-way, the voltage of battery output is reduced to the second predetermined voltage via reduction voltage circuit, and exports described the second predetermined voltage to described electronic equipment.
In the situation that the judged result of step S830 means the electric parameter first predetermined condition of described battery, for example, the amplitude of the voltage of battery output is scheduled to power threshold lower than the first predetermined voltage threshold and battery dump energy value higher than second lower than the amplitude of the voltage of the first predetermined power threshold or battery output lower than the residual electric quantity of the first predetermined voltage threshold, battery, and method of supplying power to 800 advances to step S850.At step S850, utilize described battery via alternate path to described power electronic equipment, wherein, described the first path is different from described alternate path.As example, in described alternate path, the voltage of battery output is increased to the first predetermined voltage via booster circuit, and exports described the first predetermined voltage to described electronic equipment.
For example, with cell voltage, at 2.7V, between 5V, be changed to example, the method for supplying power to according to second embodiment of the invention is described.
When electronic equipment is started shooting, at the voltage of battery output, during higher than 4.2V, via three-way, lower voltage to the second predetermined voltage of battery output (for example, 4.2V), and is provided it to electronic equipment; The voltage of battery output at 3.6V between 4.2V the time, via the first path, the voltage of battery output is directly outputed to electronic equipment; And the voltage of battery output at 2.7V between 4.2V the time, via alternate path, the voltage of battery output being increased to the first predetermined voltage (for example, 3.6V), and provides it to electronic equipment.
From being reduced to gradually 4.2V more than 4.2V when following, from three-way, switch to the first path to power electronic equipment at the voltage of battery output.From being reduced to gradually 3.6V more than 3.6V when following, from the first path, be switched to alternate path to power electronic equipment at the voltage of battery output, in the case, repeat the method for supplying power to power electronic equipment 100 according to first embodiment of the invention.
Finally, at step S899, according to the method for supplying power to power electronic equipment 800 of second embodiment of the invention, finish.
Illustrate a kind of example implementation form according to the circuit of the electric supply installation to power electronic equipment of second embodiment of the invention in Fig. 9.
Reduction voltage circuit U3 and nmos pass transistor Q4 and PMOS transistor Q5, control circuit U5 and the voltage detector L1 of alternate path PB in the booster circuit U1 that electric supply installation 900 comprises battery BATTERY, voltage comparator U2, voltage comparator U4, form the PMOS transistor Q1 of the first path PA in voltage follower circuit, form the alternate path PB in voltage follower circuit and nmos pass transistor Q2 and PMOS transistor Q3, formation voltage follower circuit.
Voltage detector L1 detects the voltage of battery output and the inverting input to voltage comparator U2 by this Voltage-output, with reference to voltage Vref1 (for example, 3.6V) provide to the in-phase input end of voltage comparator U2, voltage comparator U2 compares voltage and the reference voltage Vref 1 of battery output, and exports the first compare result signal.
Voltage detector L1 detects the voltage of battery output and the inverting input to voltage comparator U4 by this Voltage-output, with reference to voltage Vref2 (for example, 4.2V) provide to the in-phase input end of voltage comparator U4, voltage comparator U4 compares voltage and the reference voltage Vref 2 of battery output, and exports the second compare result signal.
Control circuit U5 controls conducting and the cut-off of transistor Q1-Q5 according to the first compare result signal and the second compare result signal.
For example, at the voltage of battery output during higher than 4.2V, the first comparative result and the second comparative result are low level, now control circuit U5 controls Q4 and Q5 conducting, and Q1-Q3 is ended, thus via three-way utilize reduction voltage circuit by the lower voltage of battery output to for example 4.2V, and export it to electronic circuit.
For example, when the voltage of battery output is between 3.6V and 4.2V, the first comparative result is low level, and the second comparative result is high level, now control circuit U5 controls the Q1 conducting, and makes the Q2-Q5 cut-off, directly exports the voltage of battery output to electronic circuit via the first path thus.
For example, when the voltage of battery output is between 2.7V and 3.6V, the first comparative result is high level, and the second comparative result is low level, now control circuit U5 controls Q2 and Q3 conducting, and make Q1, Q4 and Q5 cut-off, via alternate path, utilize booster circuit that the voltage of battery output is increased to for example 3.6V thus, and export it to electronic circuit.
Although the voltage that the battery of mainly usining is in the above exported is described as the electric parameter of battery, but those skilled in the art are also easy of reading the electric parameter of voltameter using the dump energy of battery as battery of battery, thereby realize similarly according to the method for supplying power to power electronic equipment of the present invention and electric supply installation.
As mentioned above, not only can be in the situation that implement method of supplying power to and the electric supply installation of the first and second embodiment according to the present invention from electronic device exterior to power electronic equipment, and can be in the situation that the power unit comprised from electronic equipment is implemented this method of supplying power to and electric supply installation to the system unit power supply in electronic equipment.
The schematic diagram comprised according to the electronic equipment 1000 of the electric supply installation to power electronic equipment of first embodiment of the invention and the second embodiment has been shown in Figure 10.
In addition, electronic equipment 1000 can also comprise control circuit 1070 as required.
Described voltage follower circuit 1040 comprises the first path PA and alternate path PB, and described the first path is different from described alternate path.In described the first path PA, the voltage of battery output is directly exported to described electronic equipment, and, in described alternate path PB, the voltage of battery output is increased to the first predetermined voltage via booster circuit, and export described the first predetermined voltage to described electronic equipment.
Utilize battery 1010 via the first path PA in the process of power electronic equipment, when described the first judged result is illustrated in described electric parameter and meets described the first predetermined condition, described voltage follower circuit 1040 switches to and utilizes described alternate path PB to described power electronic equipment.
As example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition can be: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold.Alternatively, as another example, in the situation that the residual electric quantity that the electric parameter of battery is battery, described the first predetermined condition can be: the residual electric quantity of battery is lower than the first predetermined power threshold.Alternatively, as another example, in the situation that the amplitude of the voltage that the electric parameter of battery is battery output and the residual electric quantity of battery, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, and the battery dump energy value is higher than the second predetermined power threshold.
Should be appreciated that and can realize according to the method for supplying power to power electronic equipment of the present invention and electric supply installation with the various forms of hardware, software, firmware, application specific processor or their combination.
Although describe some embodiments of the present invention here with reference to the accompanying drawings, should be appreciated that described embodiment is only illustrative, and not restrictive.The scope and spirit of the present invention that limit in not deviating from claim and equivalent thereof it will be appreciated by those skilled in the art that in the situation that can be made the variation on various forms and details to these exemplary embodiments.
Claims (17)
1. the method for supplying power to power electronic equipment comprises:
Utilize battery via the first path to power electronic equipment;
Described utilize battery via the first path in the process of power electronic equipment, detect the electric parameter of described battery;
Judge whether first predetermined condition of described electric parameter, produce the first judged result; And
When described the first judged result means that described electric parameter meets described the first predetermined condition, utilize described battery via alternate path to described power electronic equipment, wherein, described the first path is different from described alternate path.
2. method of supplying power to as claimed in claim 1, wherein,
The amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold; Perhaps
The amplitude of the voltage that the electric parameter of battery is battery output and the residual electric quantity of battery, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, and the battery dump energy value is higher than the second predetermined power threshold.
3. method of supplying power to as claimed in claim 1, wherein,
Described the first path is: the Voltage-output that battery is exported is to described electronic equipment; And
Described alternate path is: the voltage of battery output is increased to the first predetermined voltage via booster circuit, and exports described the first predetermined voltage to described electronic equipment.
4. method of supplying power to as claimed in claim 1, utilize battery via the first path to before power electronic equipment, also comprise:
Detect the electric parameter of described battery;
Judge that whether described electric parameter meets described the first predetermined condition and/or the second predetermined condition, produces the second judged result; And
When described the second judged result means that described electric parameter does not meet described the first predetermined condition and described the second predetermined condition, utilize described battery via the first path to described power electronic equipment;
When described the second judged result means that described electric parameter meets described the second predetermined condition and while not meeting described the first predetermined condition, utilize described battery via three-way to described power electronic equipment,
Wherein, described three-way is different with described alternate path from described the first path.
5. method of supplying power to as claimed in claim 4, wherein,
The amplitude of the voltage that the electric parameter of battery is battery output, described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, described the second predetermined condition is: the amplitude of the voltage of battery output is higher than the second predetermined voltage threshold, and described the second predetermined voltage threshold is higher than described the first predetermined voltage threshold; Perhaps
The residual electric quantity that the electric parameter of battery is battery, described the first predetermined condition is: the residual electricity parameter of battery is lower than the first predetermined power threshold, described the second predetermined condition is: the residual electricity parameter of battery is higher than the 3rd predetermined power threshold, and the described second predetermined power threshold is higher than the described first predetermined power threshold.
6. method of supplying power to as claimed in claim 4, wherein,
Described three-way is: the voltage of battery output is reduced to the second predetermined voltage via reduction voltage circuit, and exports described the second predetermined voltage to described electronic equipment.
7. the electric supply installation to power electronic equipment comprises:
Battery, for exporting supply power voltage;
Voltage follower circuit, for the supply power voltage that receives the output of described battery and to power electronic equipment, wherein said voltage follower circuit comprises the first path and alternate path, described the first path is different from described alternate path;
Detection part, for detection of the electric parameter of described battery;
Decision means, for judging whether first predetermined condition of described electric parameter, and produce the first judged result,
Wherein, utilize battery via the first path in the process of power electronic equipment, when described the first judged result is illustrated in described electric parameter and meets described the first predetermined condition, described voltage follower circuit switches to and utilizes described alternate path to described power electronic equipment.
8. electric supply installation as claimed in claim 7, wherein,
The amplitude of the supply power voltage that the electric parameter of battery is battery output,
Described detection part is the voltage detector for detection of the amplitude of the supply power voltage of battery output; And
Described the first predetermined condition is: the amplitude of the supply power voltage of battery output is lower than the first predetermined voltage threshold.
9. electric supply installation as claimed in claim 7, wherein,
The amplitude of the supply power voltage that the electric parameter of battery is battery output and the residual electric quantity of battery,
Described detection part comprises for detection of the voltage detector of the amplitude of the supply power voltage of battery output and for detection of the voltameter of the residual electric quantity of described battery,
Described the first predetermined condition is: the amplitude of the voltage of battery output is lower than the first predetermined voltage threshold, and the residual electric quantity of battery is higher than the second predetermined power threshold.
10. electric supply installation as claimed in claim 7, wherein,
Described the first path is: the Voltage-output that battery is exported is to described electronic equipment; And
Described alternate path is: the voltage of battery output is increased to the first predetermined voltage via booster circuit, and exports described the first predetermined voltage to described electronic equipment.
11. electric supply installation as claimed in claim 10, wherein, voltage follower circuit comprises:
The first switch, it is connected between the input of the output of battery and electronic equipment, and forms described the first path;
Second switch, it is connected between the input of the output of battery and booster circuit; And
Described booster circuit, be increased to predetermined voltage for the supply power voltage by battery output, and the output of this booster circuit is connected with the input of electronic equipment, and described second switch and this booster circuit form described alternate path,
Wherein, when described the first judged result means that described electric parameter meets described the first predetermined condition, end the first switch, and the conducting second switch.
12. electric supply installation as claimed in claim 10, wherein, voltage follower circuit comprises:
The first switch, it is connected between the input of the output of battery and electronic equipment, and forms described the first path;
Second switch, it is connected between the input of the output of battery and booster circuit;
Described booster circuit, be increased to predetermined voltage for the supply power voltage by battery output; And
The 3rd switch, it is connected between the input of the output of described booster circuit and electronic equipment, and described second switch, described the 3rd switch and described booster circuit form described alternate path,
Wherein, when described the first judged result means that described electric parameter meets described the first predetermined condition, the conducting second switch, the supply power voltage that utilizes described booster circuit rising battery to export, and
When the voltage of described booster circuit output meets the 3rd predetermined condition, end the first switch, and conducting the 3rd switch.
13. electric supply installation as claimed in claim 7, wherein,
Described voltage follower circuit also comprises three-way, described three-way is different with described alternate path from described the first path, be reduced to the second predetermined voltage for the voltage by battery output via reduction voltage circuit, and export described the second predetermined voltage to described electronic equipment; And
Whether the electric parameter that described decision means also judges described battery second predetermined condition, and produces the second judged result;
Wherein, when described the second judged result means that described electric parameter does not meet described the first predetermined condition and described the second predetermined condition, utilize described battery via the first path to described power electronic equipment;
When described the second judged result means that described electric parameter meets described the first predetermined condition and while not meeting described the second predetermined condition, utilize described battery via alternate path to described power electronic equipment;
When described the second judged result means that described electric parameter meets described the second predetermined condition and while not meeting described the first predetermined condition, utilize described battery via three-way to described power electronic equipment.
14. an electronic equipment comprises:
Battery, for exporting supply power voltage;
A plurality of electronic devices;
The power management part is described a plurality of electronic device power supply for the supply power voltage provided according to described battery;
Voltage follower circuit, be arranged between described battery and described power management part, be used for receiving the supply power voltage of described battery output and partly powering to described power management, wherein, described voltage follower circuit comprises the first path and alternate path, and described the first path is different from described alternate path;
Detection part, for detection of the electric parameter of described battery;
Decision means, for judging whether first predetermined condition of described electric parameter, and produce the first judged result,
Wherein, utilize battery via the first path in the process of power electronic equipment, when described the first judged result is illustrated in described electric parameter and meets described the first predetermined condition, described voltage follower circuit utilizes described alternate path partly to power to described power management.
15. electronic equipment as claimed in claim 14, wherein,
The amplitude of the supply power voltage that the electric parameter of battery is battery output,
Described detection part is the voltage detector for detection of the amplitude of the supply power voltage of battery output; And
Described the first predetermined condition is: the amplitude of the supply power voltage of battery output is lower than the first predetermined voltage threshold.
16. electronic equipment as claimed in claim 14, wherein,
The residual electric quantity that the electric parameter of battery is battery,
Described detection part is the voltameter for detection of the residual electric quantity of described battery, and
Described predetermined condition is: the residual electric quantity of battery is lower than the first predetermined power threshold.
17. electronic equipment as claimed in claim 14, wherein, voltage follower circuit comprises:
The first switch, it is connected between the output and power management input partly of battery, and forms described the first path;
Second switch, it is connected between the input of the output of battery and booster circuit; And
Described booster circuit, be increased to predetermined voltage for the supply power voltage by battery output, and the output of this booster circuit is connected with the input of power management part, and described second switch and this booster circuit form described alternate path,
Wherein, when described the first judged result means that described electric parameter meets described the first predetermined condition, end the first switch, and the conducting second switch.
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