CN102916468A - Battery power supply circuit, battery power supply method and mobile terminal - Google Patents
Battery power supply circuit, battery power supply method and mobile terminal Download PDFInfo
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- CN102916468A CN102916468A CN2012104025545A CN201210402554A CN102916468A CN 102916468 A CN102916468 A CN 102916468A CN 2012104025545 A CN2012104025545 A CN 2012104025545A CN 201210402554 A CN201210402554 A CN 201210402554A CN 102916468 A CN102916468 A CN 102916468A
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Abstract
The invention discloses a battery power supply circuit, a battery power supply method and a mobile terminal, belonging to the field of electronic circuits. The battery power supply circuit at least comprises a first battery and a second battery, wherein a battery output end of the first battery is connected with a radio-frequency emission module and is further grounded through a first filter capacitor; a battery output end of the second battery is connected with other chip modules and is further grounded through a second filter capacitor; and other chip modules at least comprise one of a power supply management chip, an audio module, a video module, a control module, a storage module, a processing module, a display module and a positioning module. According to the invention, by adoption of at least two batteries to supply power to the radio-frequency emission module and other chip modules respectively, even when the radio-frequency emission module emit a signal to make the voltage of one battery supplying power to the radio-frequency emission module fluctuate, the other battery and other chip modules cannot be influenced, and thus, the noise of the filter capacitors are weakened or removed.
Description
Technical field
The present invention relates to electronic circuit field, particularly a kind of battery feed circuit, method and portable terminal.
Background technology
Usually all comprise filter capacitor in the power circuit, and filter capacitor generally all adopts MLCC (Multi-Layer Ceramic Capacitor, chip multilayer ceramic capacitor), the electric capacity of this packing forms has little, difficult aging, the ESR(Equivalent Series Resistance of volume, equivalent series resistance) and ESL(Equivalent Series Inductance, the equivalent series inductance) advantage such as little.
Please refer to Figure 1A, it shows a kind of circuit diagram of battery feed circuit of mobile phone.Power management chip 120 and radiofrequency emitting module 130 that this battery feed circuit comprises battery 110, is electrical connected respectively from the different battery outputs of battery 110, and each battery output of battery 110 also passes through respectively filter capacitor 140 ground connection so that filtering.It is pointed out that when filter capacitor 140 adopts MLCC, can as other ceramic condenser, have piezoelectric effect.Piezoelectric effect refers to that the medium (MLCC described above) of certain material can produce certain electromotive force and electric field when mechanical deformation; Reversibly, when this medium is in the elect magnetic field of variation, also corresponding mechanical deformation can occur.If this medium is in an elect magnetic field, and the frequency of this electromagnetic field is the scope that people's ear can be heard just, and so this medium will send the noise that people's ear can be heard.
Because GSM(Global System of Mobile communication, global system for mobile communications) design characteristics, PA(PowerAmplify in the radio frequency sending module 130, power amplifier) with per 1/216.8 second (being the frequency of 216.8Hz) emission signal, and when the emission signal, the current drain of the power circuit of whole mobile phone is larger, reason owing to the internal resistance of cell and circuit internal resistance, cell voltage can be dragged down by moment, rectangular waveshape fluctuates in time, specifically as shown in Figure 1B.
In realizing process of the present invention, the inventor finds that there is following problem at least in technique scheme: when filter capacitor 140 adopts MLCC, because the existence of piezoelectric effect, filter capacitor 140 can when fluctuation occurs cell voltage, send the noise that people's ear can be heard.Although in the technique scheme, exist to adopt without the tantalum electric capacity of the piezoelectric effect solution as filter capacitor 140, the cost of tantalum electric capacity is higher, ESR is very large, is not preferred version.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of battery feed circuit, method and portable terminal, when be used for to solve adopting MLCC as filter capacitor, because cell voltage fluctuation and piezoelectric effect cause the problem of the noise that filter capacitor generation people ear can hear.
According to an aspect of the present invention, provide a kind of battery feed circuit, having comprised:
At least comprise the first battery and the second battery;
The battery output of described the first battery links to each other with radiofrequency emitting module, and the battery output of described the first battery is also by the first filter capacitor ground connection;
The battery output of described the second battery links to each other with other chip module, and the battery output of described the second battery is also by the second filter capacitor ground connection;
Described other chip module comprises a kind of in power management chip, audio-frequency module, video module, control module, memory module, processing module, display module and the locating module at least.
Preferably, described the first filter capacitor and described the second filter capacitor are chip multilayer ceramic capacitor;
Perhaps, described the first filter capacitor is tantalum electric capacity, and described the second filter capacitor is chip multilayer ceramic capacitor.
Preferably, the battery output of described the first battery links to each other with described radiofrequency emitting module by the first switches set, and described the first switches set also links to each other with described other chip module;
The battery output of described the second battery links to each other with described other chip module by the second switch group, and described second switch group also links to each other with described radiofrequency emitting module;
When described the first switches set and described second switch group are in the first on off state, the battery output of described the first battery and described radiofrequency emitting module conducting, and the battery output of described the second battery and described other chip module conducting;
When described the first switches set and described second switch group are in the second switch state, the battery output of described the first battery and described other chip module conducting, and the battery output of the second battery and described radiofrequency emitting module conducting.
Preferably, described battery feed circuit also comprises the first electric weight detection module, the second electric weight detection module and control module;
Described the first electric weight detection module is for detection of the battery electric quantity of the first battery;
Described the second electric weight detection module is for detection of the battery electric quantity of the second battery;
Described control module is used for controlling described the first switches set and second switch group and becoming the second switch state by the first on off state when the battery electric quantity of described the first battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the second battery;
Described control module also is used for controlling described the first switches set and second switch group and becoming the first on off state by the second switch state when the battery electric quantity of described the second battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the first battery.
Preferably, described the first switches set comprises 1a switch and 1b switch, and an end of described 1a switch links to each other with the battery output of described the first battery, and the other end of described 1a switch links to each other with described radiofrequency emitting module; One end of described 1b switch links to each other with the battery output of described the first battery, and the other end of described 1b switch links to each other with described other chip module;
Described second switch group comprises 2a switch and 2b switch, and an end of described 2a switch links to each other with the battery output of described the second battery, and the other end of described 2a switch links to each other with described other chip module; One end of described 2b switch links to each other with the battery output of described the second battery, and the other end of described 2b switch links to each other with described radiofrequency emitting module.
Preferably, described control module, concrete being used for controlled described 1b switch and becomes conducting state by cut-off state when the battery electric quantity of described the first battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the second battery, then controls the 2a switch and becomes cut-off state by conducting state; And control described 2b switch and become conducting state by cut-off state, then control described 1a switch and become cut-off state by conducting state;
Described control module, concrete being used for when the battery electric quantity of described the second battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the first battery also, control described 2a switch and become conducting state by cut-off state, then control described 1b switch and become cut-off state by conducting state; And control described 1a switch and become conducting state by cut-off state, then control described 2b switch and become cut-off state by conducting state.
According to a further aspect in the invention, provide a kind of portable terminal, comprised the battery feed circuit described in above-mentioned one side.
In accordance with a further aspect of the present invention, a kind of power-supplying method for battery is provided, and described method is used for comprising at least the first battery and the second battery, and described the first battery is the radiofrequency emitting module power supply, in the battery feed circuit of described the second battery for other chip module power supply, comprising:
The battery electric quantity and the initial condition that detect respectively initial condition and be the first battery of described radiofrequency emitting module power supply are the battery electric quantity of the second battery of described other chip module power supply;
Judge the magnitude relationship of the battery electric quantity of the battery electric quantity of described the first battery and described the second battery;
When the battery electric quantity of described the first battery reached predetermined threshold less than the amplitude of the battery electric quantity of described the second battery, controlling described the first battery was described other chip module power supply, and described the second battery is described radiofrequency emitting module power supply;
When the battery electric quantity of described the first battery reached predetermined threshold greater than the amplitude of the battery electric quantity of described the second battery, controlling described the first battery was described radiofrequency emitting module power supply, and described the second battery is described other chip module power supply;
Described other chip module comprises a kind of in power management chip, audio-frequency module, video module, control module, memory module, processing module, display module and the locating module at least.
Preferably, described the first battery of described control is described other chip module power supply, and described the second battery is that the mode of described radiofrequency emitting module power supply is:
Control described the first battery and begin as after described other chip module power supply, the power supply that to cut off described the second battery be described other chip module; Control described the second battery and begin as after the power supply of described radiofrequency emitting module, the power supply that to cut off described the first battery be described radiofrequency emitting module.
Preferably, described the first battery of described control is described radiofrequency emitting module power supply, and described the second battery is that the mode of described other chip module power supply is:
Control described the first battery and begin as after the power supply of described radiofrequency emitting module, the power supply that to cut off described the second battery be described radiofrequency emitting module; Control described the second battery and begin as after described other chip module power supply, the power supply that to cut off described the first battery be described other chip module.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:
By adopting at least two batteries to be respectively radiofrequency emitting module and the power supply of other chip module, when having solved employing MLCC as filter capacitor, because cell voltage fluctuation and piezoelectric effect cause the problem of the noise that filter capacitor generation people ear can hear; Even if when having reached radiofrequency emitting module emission signal, so that for the cell voltage of a battery of its power supply fluctuates, also can not have influence on another battery and other chip module, thereby weaken or eliminate noise.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1A is a kind of circuit diagram of battery feed circuit of mobile phone;
Figure 1B is the wave form varies figure of the cell voltage in the battery feed circuit among Figure 1A;
Fig. 2 is the circuit diagram of the battery feed circuit that provides of the embodiment of the invention one;
Fig. 3 A is the circuit diagram of the battery feed circuit that provides of the embodiment of the invention two;
Fig. 3 B is the wave form varies figure of the cell voltage in the battery feed circuit that provides of the embodiment of the invention two;
Fig. 4 is the circuit diagram of the battery feed circuit that provides of the embodiment of the invention three;
Fig. 5 is the circuit diagram of the battery feed circuit that provides of the embodiment of the invention four;
Fig. 6 is the method flow diagram of the power-supplying method for battery that provides of the embodiment of the invention five.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment one
Please refer to Fig. 2, it shows the circuit diagram of the battery feed circuit that the embodiment of the invention one provides.This battery feed circuit comprises the first battery 202 and the second battery 204 at least.
The battery output of the first battery 202 links to each other with radiofrequency emitting module 206, and the battery output of the first battery 202 is also by the first filter capacitor 208 ground connection.
The battery output of the second battery 204 links to each other with other chip module 210, and the battery output of the second battery 204 is also by the second filter capacitor 212 ground connection.
In sum, the battery feed circuit that the present embodiment provides, by adopting at least two batteries to be respectively radiofrequency emitting module and the power supply of other chip module, when having solved employing MLCC as filter capacitor, because cell voltage fluctuation and piezoelectric effect cause the problem of the noise that filter capacitor generation people ear can hear; Even if when having reached radiofrequency emitting module emission signal, so that for the cell voltage of a battery of its power supply fluctuates, also can not have influence on another battery and other chip module, thereby weaken or eliminate the noise of filter capacitor.
Embodiment two
Please refer to Fig. 3 A, it shows the circuit diagram of the battery feed circuit that the embodiment of the invention two provides.In the present embodiment, mainly illustrate take other chip module as power management chip as example.This battery feed circuit can realize becoming the part in the portable terminal such as mobile phone, panel computer and E-book reader.This battery feed circuit comprises the first battery 302 and the second battery 304 at least.
The battery output of the first battery 302 links to each other with radiofrequency emitting module 306, and the battery output of the first battery 302 is also by the first filter capacitor 308 ground connection.Wherein, the battery output of the first battery 302 can refer to the positive pole of the first battery 302.
The battery output of the second battery 304 links to each other with power management chip 310, and the battery output of the second battery 3204 is also by the second filter capacitor 312 ground connection.Wherein, the battery output of the second battery 304 can refer to the positive pole of the second battery 304.
Wherein, the first filter capacitor 308 and the second filter capacitor 312 can be MLCC.
Preferably, the first filter capacitor 308 is tantalum electric capacity, and the second filter capacitor 312 is MLCC.
Obviously, come independently to be respectively radiofrequency emitting module 306 and power management chip 310 power supplies by increasing battery, even if radiofrequency emitting module 306 emission signals, so that the cell voltage of the first battery 302 fluctuates, can not have influence on the second battery 304 and power management chip 310 yet, the visible Fig. 3 B of the wave form varies figure of the cell voltage of two batteries, when the rectangular wave-wave of the cell voltage of the first battery 302 moved, the cell voltage held stationary of the second battery 304 was constant.
In addition, because the first battery 302 only comprises a battery output usually, the second battery 304 generally includes several battery outputs, when the first filter capacitor 308 and the second filter capacitor 312 are MLCC, the scheme that the present embodiment provides can be eliminated the noise of the second filter capacitor 312, the residual noise that the first filter capacitor 308 is arranged only, thus the noise of filter capacitor effectively weakened; Be tantalum electric capacity at the first filter capacitor 308, when the second filter capacitor 312 was MLCC, the noise of all filter capacitors all can be eliminated, thereby had eliminated the noise of whole filter capacitors.
In sum, the battery feed circuit that the present embodiment provides, by adopting at least two batteries to be respectively radiofrequency emitting module and power management chip power supply, when having solved employing MLCC as filter capacitor, because cell voltage fluctuation and piezoelectric effect cause the problem of the noise that filter capacitor generation people ear can hear; Even if when having reached radiofrequency emitting module emission signal, so that for the cell voltage of a battery of its power supply fluctuates, also can not have influence on another battery and power management chip, thereby weaken noise.Simultaneously, also by adopting tantalum electric capacity as the first filter capacitor, under the prerequisite that does not increase too many cost, eliminate noise fully.
Embodiment three
Because under different implementation environments, the unit power consumption amount of radiofrequency emitting module and power management chip is different, so in above-described embodiment, after the electric weight that a battery may occur was finished, the electric weight of another battery was also retained a lot of situations.In order to address this problem simultaneously, realize better noise elimination and the effect of powering preferably, please continue with reference to following embodiment:
Please refer to Fig. 4, it shows the circuit diagram of the battery feed circuit that the embodiment of the invention three provides.In the present embodiment, still illustrate take other chip module as power management chip as example.This battery feed circuit can realize becoming the part in the portable terminal such as mobile phone, panel computer and E-book reader.This battery feed circuit has also increased the first electric weight detection module 422, the second electric weight detection module 424, control module 426, comprised the first switches set of 1a switch and 1b switch and has comprised the 2a switch and the second switch group of 2b switch on the basis of above-described embodiment.Wherein:
The battery output of the first battery 402 links to each other with radiofrequency emitting module 406 by the first switches set, and the first switches set also links to each other with power management chip 410.Specifically, the first switches set comprises 1a switch and 1b switch, and an end of 1a switch links to each other with the battery output of the first battery 402, and the other end of 1a switch links to each other with radiofrequency emitting module 406; One end of 1b switch links to each other with the battery output of the first battery 402, and the other end of 1b switch links to each other with power management chip 410.Wherein, the battery output of the first battery 402 can refer to the positive pole of the first battery 402, and the battery output of the first battery 402 also passes through the first filter capacitor 408 ground connection so that filtering.
Similarly, the battery output of the second battery 404 links to each other with power management chip 410 by the second switch group, and the second switch group also links to each other with radiofrequency emitting module 406.Specifically, the second switch group comprises 2a switch and 2b switch, and an end of 2a switch links to each other with the battery output of the second battery 404, and the other end of 2a switch links to each other with power management chip 410; One end of 2b switch links to each other with the battery output of the second battery 404, and the other end of 2b switch links to each other with radiofrequency emitting module 406.Wherein, the battery output of the second battery 404 can refer to the positive pole of the second battery 404, and the battery output of the second battery 404 also passes through the second filter capacitor 412 ground connection so that filtering.
Wherein, the first filter capacitor 408 and the second filter capacitor 412 can be MLCC.
Preferably, the first filter capacitor 408 is tantalum electric capacity, and the second filter capacitor 412 is MLCC.
Above-mentioned 1a switch, 1b switch, 2a switch and 2b switch can be power switchs, such as NMOS(N-Mental-Oxide-Semiconducto, and Metal-oxide-semicondutor) transistor.
When concrete the use, can between the first on off state and second switch state, switch as one sees fit according to the battery electric quantity of the first battery 402 and the second battery 404.
When the first switches set and second switch group are in the first on off state, the battery output of the first battery 402 and radiofrequency emitting module 406 conductings, and the battery output of the second battery 404 and power management chip 410 conductings;
When the first switches set and second switch group are in the second switch state, the battery output of the first battery 402 and power management chip 410 conductings, and the battery output of the second battery 404 and radiofrequency emitting module 406 conductings.
Controlling the mode that two switches set switch between the first on off state and second switch state may have multiple.The concrete mode that adopts in the present embodiment is as follows:
The first electric weight detection module 422 is for detection of the battery electric quantity of the first battery 402.The first electric weight detection module 422 can comprise the first resistance R 1, R1 is connected between the battery output and the first switches set of the first battery 402, and the first electric weight detection module 422 can detect by the magnitude of voltage that detects the first resistance R 1 two ends the battery electric quantity of the first battery 402.The first electric weight detection module 422 can detect in real time incessantly, also can detect on periodic intermittent ground.
The second electric weight detection module 424 is for detection of the battery electric quantity of the second battery 404.The second electric weight detection module 424 can comprise the second resistance R 2, R2 is connected between the battery output and second switch group of the second battery 404, and the second electric weight detection module 424 can detect by the magnitude of voltage that detects the second resistance R 2 two ends the battery electric quantity of the second battery 404.The second electric weight detection module 424 can detect in real time incessantly, also can detect on periodic intermittent ground.
During this example specific implementation, above-mentioned electric weight detection module specifically can be by detecting the voltage difference at the first resistance R 1 two ends, then can calculate the electric current that flows through on the power supply circuits according to formula I=U/R, then, the electric current that calculates is carried out integration in time domain try to achieve electric weight, in this case, the electric weight detection module should be wanted the voltage difference at continual detection R1 two ends;
In addition, in other realization example, above-mentioned electric weight detection module can also be inferred according to cell voltage the electric weight of himself, in this case, above-mentioned electric weight detection module just can directly can obtain the electric weight of battery by detecting cell voltage, concrete implementation procedure does not need to do by the mode of above-mentioned resistance yet, and under this implementation, above-mentioned electric weight detection module is the electric weight that can periodically detect battery.
Control module 426, when the amplitude of the battery electric quantity of the second battery that the battery electric quantity that is used for the first battery of detecting at the first electric weight detection module 422 detects less than the second electric weight detection module 424 reaches predetermined threshold, control the first switches set and the second switch group becomes the second switch state by the first on off state;
Control module 426, when the amplitude of the battery electric quantity of the first battery that the battery electric quantity that also is used for the second battery of detecting at the second electric weight detection module 424 detects less than the first electric weight detection module 422 reaches predetermined threshold, control the first switches set and the second switch group becomes the first on off state by the second switch state.
Wherein, the value of predetermined threshold can be [0, the largest battery electric weight).In above-mentioned twice deterministic process of control module 426, the value of predetermined threshold can be identical, also can be different.Need to prove simultaneously, control module 426 is employed battery electric quantity in deterministic process, is the battery electric quantity of the first battery 402 of gathering respectively in synchronization of the first electric weight detection module 422 and the second electric weight detection module 424 and the battery electric quantity of the second battery 404.
For the power supply that keeps radiofrequency emitting module 406 and power management chip 410 is not cut off in the handoff procedure of two switches set, the control logic of control module 426 can be specific as follows:
When the battery electric quantity of the first battery reached predetermined threshold less than the amplitude of the battery electric quantity of the second battery, control 1b switch became conducting state by cut-off state, then controls the 2a switch and becomes cut-off state by conducting state; And control 2b switch becomes conducting state by cut-off state, then controls the 1a switch and becomes cut-off state by conducting state;
When the battery electric quantity of the second battery reached predetermined threshold less than the amplitude of the battery electric quantity of the first battery, control 2a switch became conducting state by cut-off state, then controls the 1b switch and becomes cut-off state by conducting state; And control 1a switch becomes conducting state by cut-off state, then controls the 2b switch and becomes cut-off state by conducting state.
In sum, the battery feed circuit that the present embodiment provides, by adopting at least two batteries to be respectively radiofrequency emitting module and power management chip power supply, when having solved employing MLCC as filter capacitor, because cell voltage fluctuation and piezoelectric effect cause the problem of the noise that filter capacitor generation people ear can hear; Even if when having reached radiofrequency emitting module emission signal, so that for the cell voltage of a battery of its power supply fluctuates, also can not have influence on another battery and power management chip, thereby weaken noise.Simultaneously, can also by adopting tantalum electric capacity as the first filter capacitor, under the prerequisite that does not increase too many cost, eliminate noise fully.
In addition, by increasing electric weight detection module, control module and two switches set, can be so that the first battery and the second battery be realized balanced power supply.In a concrete implementation environment, the user uses the mobile phone comprise the battery feed circuit that the present embodiment provides.Assumed initial state is the radiofrequency emitting module power supply by the first battery, the second battery is the power management chip power supply, in the phase I, the user converses comparatively continually, use radiofrequency emitting module more this moment, and the power consumption of power management chip can be smaller, and the electric quantity consumption of the first battery is very fast.At this moment, if control module learns that the battery electric quantity of the first battery is less than the battery electric quantity of the second battery, just can control the first switches set and the second switch group becomes the second switch state by the first on off state, being replaced by the second battery powers to radiofrequency emitting module, the first battery is powered to power management chip, reasonably to utilize the electric weight of each battery; But in second stage, when the user plays games always, mostly what use is power management chip, this moment, the power consumption of power management chip can be larger, and the power consumption of radiofrequency emitting module can be smaller, at this moment, if control module learns that the battery electric quantity of the second battery is less than the battery electric quantity of the first battery, just can control the first switches set and the second switch group becomes the first on off state by the second switch state, being replaced by the first battery powers to radiofrequency emitting module, the second battery is powered to power management chip, reasonably to utilize the electric weight of each battery.
Embodiment four
Although above-described embodiment all illustrates take other chip module as power management chip as example, but should recognize, other chip module not only can be power management chip, can also be a kind of in audio-frequency module, video module, control module, memory module, processing module, display module and the locating module at least, be as the criterion with the particular hardware design of portable terminal.When other chip module also comprises the module of audio-frequency module except power management chip, video module and so on, the power supply plan that above-described embodiment provides can also be eliminated the TDD noise(Time Division Duplexing noise between the disparate modules, time division duplex noise simultaneously).Specifically please refer to following embodiment:
Please refer to Fig. 5, it shows the circuit diagram of the battery feed circuit that the embodiment of the invention four provides.In the present embodiment, mainly comprise that take other chip module power management chip and audio-frequency module illustrate as example.This battery feed circuit can realize becoming the part in the portable terminal such as mobile phone, panel computer and E-book reader.This battery feed circuit comprises the first battery 502 and the second battery 504 at least.
The battery output of the first battery 502 links to each other with radiofrequency emitting module 506, and the battery output of the first battery 502 is also by the first filter capacitor 508 ground connection.Wherein, the battery output of the first battery 502 can refer to the positive pole of the first battery 502.
A part of battery output of the second battery 504 links to each other with power management chip 510, and another part battery output links to each other with audio-frequency module 514, and the battery output of the second battery 504 is also by the second filter capacitor 512 ground connection.Wherein, the battery output of the second battery 504 can refer to the positive pole of the second battery 504.
Wherein, the first filter capacitor 508 and the second filter capacitor 512 can be MLCC.
Preferably, the first filter capacitor 508 is tantalum electric capacity, and the second filter capacitor 512 is MLCC.
Because in the present embodiment, other chip module comprises a more than module, if only there is a powered battery, caused cell voltage fluctuation can cause the filter capacitor of each battery output of this battery to produce noise during radiofrequency emitting module emission signal, at this moment, can produce TDD noise simultaneously between power management chip 510 and the audio-frequency module 514.
And employing design as shown in Figure 5, caused cell voltage fluctuation can not have influence on the cell voltage of the second battery 504 during radiofrequency emitting module emission signal, so in the noise of eliminating 512 generations of the second filter capacitor, can eliminate simultaneously the TDD noise between power management chip 510 and the audio-frequency module 514.
Apparently, can also different modules set up respectively a battery to power separately, also can obtain identical effect, this is given unnecessary details no longer one by one.
In sum, the battery feed circuit that the present embodiment provides is compared with previous embodiment, when other chip module comprises a plurality of module, not only the effect that weakens or eliminate the noise of filter capacitor can be reached, the effect of the TDD noise that eliminates simultaneously between the disparate modules can also be reached.
Embodiment five
When said apparatus embodiment is provided, also provide corresponding embodiment of the method.
Please refer to Fig. 6, it shows the method flow diagram of the power-supplying method for battery that the embodiment of the invention five provides.This power-supplying method for battery is used for comprising at least the first battery and the second battery, the first battery is the radiofrequency emitting module power supply, in the battery feed circuit of the second battery for other chip module power supply, this other chip module comprises one or more in power management chip, audio-frequency module, video module, control module, display module and the locating module.This power-supplying method for battery comprises:
Step 602 detects respectively initial condition and is the battery electric quantity of the second battery that the battery electric quantity of the first battery of radiofrequency emitting module power supply and initial condition power for other chip module;
Step 604 is judged the magnitude relationship of the battery electric quantity of the battery electric quantity of the first battery and the second battery; If the battery electric quantity of the first battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the second battery, then enter step 606; If when the battery electric quantity of the first battery reaches predetermined threshold greater than the amplitude of the battery electric quantity of the second battery, then enter step 608.
This step is specifically as follows: control the first battery and begin to cut off the second battery and be the power supply of other chip module for after other chip module power supply; Controlling the second battery begins to cut off the power supply that the first battery is radiofrequency emitting module for after the radiofrequency emitting module power supply.
This step is specifically as follows: control the first battery and begin to cut off the power supply that the second battery is radiofrequency emitting module for after the radiofrequency emitting module power supply; Controlling the second battery begins to cut off the first battery and be the power supply of other chip module for after other chip module power supply.
In sum, the power-supplying method for battery that the present embodiment provides, come optionally to be radiofrequency emitting module and the power supply of other chip module by the battery electric quantity according to two batteries, can solve the unit power consumption amount of radiofrequency emitting module and power management chip not simultaneously, after the electric weight that a battery may occur is finished, the electric weight of another battery is also retained a lot of problems, has reached the first battery and the second battery and can balancedly be the effect of radiofrequency emitting module with other chip module power supply.
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
The all or part of step that one of ordinary skill in the art will appreciate that realization above-described embodiment can be finished by hardware, also can come the relevant hardware of instruction to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a battery feed circuit is characterized in that, comprising:
At least comprise the first battery and the second battery;
The battery output of described the first battery links to each other with radiofrequency emitting module, and the battery output of described the first battery is also by the first filter capacitor ground connection;
The battery output of described the second battery links to each other with other chip module, and the battery output of described the second battery is also by the second filter capacitor ground connection;
Described other chip module comprises a kind of in power management chip, audio-frequency module, video module, control module, memory module, processing module, display module and the locating module at least.
2. battery feed circuit according to claim 1 is characterized in that,
Described the first filter capacitor and described the second filter capacitor are chip multilayer ceramic capacitor;
Perhaps, described the first filter capacitor is tantalum electric capacity, and described the second filter capacitor is chip multilayer ceramic capacitor.
3. battery feed circuit according to claim 1 and 2 is characterized in that, the battery output of described the first battery links to each other with described radiofrequency emitting module by the first switches set, and described the first switches set also links to each other with described other chip module;
The battery output of described the second battery links to each other with described other chip module by the second switch group, and described second switch group also links to each other with described radiofrequency emitting module;
When described the first switches set and described second switch group are in the first on off state, the battery output of described the first battery and described radiofrequency emitting module conducting, and the battery output of described the second battery and described other chip module conducting;
When described the first switches set and described second switch group are in the second switch state, the battery output of described the first battery and described other chip module conducting, and the battery output of the second battery and described radiofrequency emitting module conducting.
4. battery feed circuit according to claim 3 is characterized in that, described battery feed circuit also comprises the first electric weight detection module, the second electric weight detection module and control module;
Described the first electric weight detection module is for detection of the battery electric quantity of the first battery;
Described the second electric weight detection module is for detection of the battery electric quantity of the second battery;
Described control module is used for controlling described the first switches set and second switch group and becoming the second switch state by the first on off state when the battery electric quantity of described the first battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the second battery;
Described control module also is used for controlling described the first switches set and second switch group and becoming the first on off state by the second switch state when the battery electric quantity of described the second battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the first battery.
5. battery feed circuit according to claim 4, it is characterized in that, described the first switches set comprises 1a switch and 1b switch, and an end of described 1a switch links to each other with the battery output of described the first battery, and the other end of described 1a switch links to each other with described radiofrequency emitting module; One end of described 1b switch links to each other with the battery output of described the first battery, and the other end of described 1b switch links to each other with described other chip module;
Described second switch group comprises 2a switch and 2b switch, and an end of described 2a switch links to each other with the battery output of described the second battery, and the other end of described 2a switch links to each other with described other chip module; One end of described 2b switch links to each other with the battery output of described the second battery, and the other end of described 2b switch links to each other with described radiofrequency emitting module.
6. battery feed circuit according to claim 5 is characterized in that,
Described control module, concrete being used for when the battery electric quantity of described the first battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the second battery, control described 1b switch and become conducting state by cut-off state, then control the 2a switch and become cut-off state by conducting state; And control described 2b switch and become conducting state by cut-off state, then control described 1a switch and become cut-off state by conducting state;
Described control module, concrete being used for when the battery electric quantity of described the second battery reaches predetermined threshold less than the amplitude of the battery electric quantity of the first battery also, control described 2a switch and become conducting state by cut-off state, then control described 1b switch and become cut-off state by conducting state; And control described 1a switch and become conducting state by cut-off state, then control described 2b switch and become cut-off state by conducting state.
7. a portable terminal is characterized in that, comprises such as the arbitrary described battery feed circuit of claim 1 to 6.
8. a power-supplying method for battery is characterized in that, described method is used for comprising at least the first battery and the second battery, and described the first battery is the radiofrequency emitting module power supply, and in the battery feed circuit of described the second battery for other chip module power supply, comprising:
The battery electric quantity and the initial condition that detect respectively initial condition and be the first battery of described radiofrequency emitting module power supply are the battery electric quantity of the second battery of described other chip module power supply;
Judge the magnitude relationship of the battery electric quantity of the battery electric quantity of described the first battery and described the second battery;
When the battery electric quantity of described the first battery reached predetermined threshold less than the amplitude of the battery electric quantity of described the second battery, controlling described the first battery was described other chip module power supply, and described the second battery is described radiofrequency emitting module power supply;
When the battery electric quantity of described the first battery reached predetermined threshold greater than the amplitude of the battery electric quantity of described the second battery, controlling described the first battery was described radiofrequency emitting module power supply, and described the second battery is described other chip module power supply;
Described other chip module comprises a kind of in power management chip, audio-frequency module, video module, control module, memory module, processing module, display module and the locating module at least.
9. power-supplying method for battery according to claim 8 is characterized in that, described the first battery of described control is described other chip module power supply, and described the second battery is that the mode of described radiofrequency emitting module power supply is:
Control described the first battery and begin as after described other chip module power supply, the power supply that to cut off described the second battery be described other chip module;
Control described the second battery and begin as after the power supply of described radiofrequency emitting module, the power supply that to cut off described the first battery be described radiofrequency emitting module.
10. power-supplying method for battery according to claim 8 is characterized in that, described the first battery of described control is described radiofrequency emitting module power supply, and described the second battery is that the mode of described other chip module power supply is:
Control described the first battery and begin as after the power supply of described radiofrequency emitting module, the power supply that to cut off described the second battery be described radiofrequency emitting module;
Control described the second battery and begin as after described other chip module power supply, the power supply that to cut off described the first battery be described other chip module.
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| CN201210402554.5A CN102916468B (en) | 2012-10-19 | 2012-10-19 | Battery power supply circuit, battery power supply method and mobile terminal |
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| CN201210402554.5A CN102916468B (en) | 2012-10-19 | 2012-10-19 | Battery power supply circuit, battery power supply method and mobile terminal |
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Address after: 100085 Beijing city Haidian District Qinghe Street No. 68 Huarun colorful city shopping center two floor 13 Patentee after: Xiaomi Technology Co., Ltd. Address before: 100102 Beijing Wangjing West Road, a volume of stone world building, A, block, floor 12 Patentee before: Xiaomi Technology Co., Ltd. |