CN105375544A - Low-battery battery charging method and power management integrated circuit - Google Patents
Low-battery battery charging method and power management integrated circuit Download PDFInfo
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- CN105375544A CN105375544A CN201410438186.9A CN201410438186A CN105375544A CN 105375544 A CN105375544 A CN 105375544A CN 201410438186 A CN201410438186 A CN 201410438186A CN 105375544 A CN105375544 A CN 105375544A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The embodiment of the invention discloses a low-battery battery charging method. The method includes: a battery is charged with a first current value; the voltage difference in a unit time of the battery is obtained or the current charging state of the battery is obtained; whether the voltage difference or the charging state satisfies a first preset condition is determined, if yes, the battery is charged with a second current value, and the second current value is greater than the first current value. According to the method, the voltage difference or the charging state of the battery is detected, whether the voltage difference or the charging state satisfies the first preset condition is determined, the charging current is increased, the consumption of a power management integrated circuit and a terminal system in the battery during low-battery charging of the battery is satisfied, the battery can be charged during low battery, the constant current charging condition can be achieved as soon as possible via the improvement of the charging current, and the charging time of the low-battery battery is reduced.
Description
Technical field
The present invention relates to battery charging field, the particularly low Electronic power batteries charging method of one and power management integrated circuit.
Background technology
Existing power management integrated circuit (English abbreviation PMIC, PowerManagementIC), is used to the power-supply device in management host system, is usually used in mobile phone and various mobile terminal device.
Substantially being divided into three phases when carrying out battery charging, is trickle charge, constant current charge, constant voltage charge respectively.In order to protect battery, the electric current of trickle charge is less, and be probably 50mA, constant current charge battery is maximum charging current, is generally 500mA, 1A etc.Trickle charge is that cell voltage reaches a fixing magnitude of voltage, such as 2.8V to the switch condition of constant current charge.
Due to when inserting charger, the PMIC of present majority all has the function of Auto Power On, system boot by cause the electric current of trickle charge consume by system, make battery not obtain charging current and cell voltage can not be made to reach the switching condition of trickle charge and constant current charge, cause system forever cannot start.Even if the strategy of optimization software system when shutting down charging, the power consumption in system also can consume most trickle-charge current, causes the switch condition that all cannot reach constant current charge for a long time, wastes a lot of charging interval.
Summary of the invention
Embodiments provide a kind of low Electronic power batteries charging method, described method comprises:
With the first current value for battery charges;
Obtain the voltage difference within the unit interval of described battery or obtain the current charged state of described battery;
Judge whether described voltage difference or charged state meet first pre-conditioned, if be then the charging of described battery with the second current value, wherein, described second current value is greater than the first current value.
Further, the voltage difference within the unit interval obtaining described battery specifically comprises:
Gathered first magnitude of voltage in a upper moment;
Gather the second magnitude of voltage of current time;
Second magnitude of voltage and the first magnitude of voltage are made difference and obtain voltage difference.
Further, described first is pre-conditionedly not more than zero for voltage difference, describedly judges whether described voltage difference or charged state meet first and pre-conditionedly specifically to comprise:
Judge whether the voltage difference of described battery within the unit interval is not more than zero, if it is first pre-conditioned then to determine that described voltage difference meets.
Further, if described then with the second current value be described battery charging after also comprise:
Obtain the current voltage of described battery, described current voltage is obtained by voltage detecting circuit;
Judge whether described current voltage reaches second pre-conditioned, if then charge with the 3rd current value.
Further, described second pre-conditionedly reaches changing voltage for described current voltage, described 3rd current value is constant current charge current value, describedly judges whether described current voltage reaches second pre-conditioned, specifically comprises if then carry out charging with the 3rd current value:
Judge whether described current voltage reaches changing voltage, if then charge with constant current charge current value.
Further, also comprise before the charged state that the described battery of described acquisition is current:
Configuration each time interval obtained between described battery present charge state.
Further, described first does not pre-conditionedly reach constant current charge state for current charged state, describedly judges whether described voltage difference or described charged state meet first and pre-conditionedly specifically to comprise:
Judge whether the current charged state of described battery does not reach constant current charge state, if then described charged state meets first pre-conditioned.
Another object of the present invention additionally provides a kind of power management integrated circuit, comprising: supply module, acquisition module, judge module;
Described supply module, for the first current value for battery charges;
Described acquisition module, for obtaining the voltage difference within the unit interval of described battery or obtaining the current charged state of described battery, and sends to described judge module.
Described judge module, first pre-conditioned for judging whether described voltage difference or charged state meet, if be then the charging of described battery with the second current value, wherein, described second current value is greater than the first current value.
As the preferred scheme of one, described acquisition module comprises:
First acquiring unit, for gathering first magnitude of voltage in a upper moment and gathering the second magnitude of voltage of current time;
First arithmetic element, for receive first acquiring unit gather the first magnitude of voltage and the second magnitude of voltage, and the second magnitude of voltage and the first magnitude of voltage are done differ from obtain voltage difference;
First judging unit, for judging that the voltage difference of described battery within the unit interval is not more than zero;
First determining unit, first pre-conditioned for determining that when the first judging unit judged result is for being described voltage difference meets;
Second acquisition unit, obtains the current voltage of described battery;
Second judging unit, for judging whether described current voltage reaches second pre-conditioned, with make described current voltage reach second pre-conditioned time described supply module charge with the 3rd current value.
As the preferred scheme of one, described circuit comprises:
First timing unit, for configuring each time interval obtained between described battery present charge state;
3rd judging unit, for judging whether the current charged state of described battery does not reach constant current charge state;
Second determining unit, satisfied first pre-conditioned for determining when the 3rd judging unit judged result is for being.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
With the first current value for battery charges, obtain the voltage difference within the unit interval of described battery or obtain the current charged state of described battery, judge whether described voltage difference or charged state meet first pre-conditioned, if then with the second current value be described battery charging, wherein, described second current value is greater than the first current value.By to the voltage difference of battery or the detection of charged state, judge that voltage difference or charged state meet first pre-conditioned, then improve charging current, meet the consumption of inside battery power management integrated circuit and terminal system when battery low-electricity quantity charges, battery can be allowed to charge when low electricity, reach constant current charge condition as early as possible by raising charging current, shorten the charging interval of low Electronic power batteries.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of embodiment of low electricity charging method in the embodiment of the present invention;
Fig. 2 is the flow chart of the another kind of embodiment of low electricity charging method in the embodiment of the present invention;
Fig. 3 is the flow chart of the another kind of embodiment of low electricity charging method in the embodiment of the present invention;
Fig. 4 is the flow chart of the another kind of embodiment of low electricity charging method in the embodiment of the present invention;
Fig. 5 is the flow chart of a kind of embodiment of battery management integrated circuit in the embodiment of the present invention;
Fig. 6 is the flow chart of the another kind of embodiment of battery management integrated circuit in the embodiment of the present invention;
Fig. 7 is the flow chart of the another kind of embodiment of battery management integrated circuit in the embodiment of the present invention.
Embodiment
Embodiments provide a kind of low Electronic power batteries charging method and power management integrated circuit, charge when low electricity for battery, reach constant current charge condition as early as possible by raising charging current, shorten the charging interval of low Electronic power batteries.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.The embodiments described herein should be appreciated that the data used like this can be exchanged in the appropriate case, so that can be implemented with the order except the content except here diagram or description.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Incorporated by reference to Fig. 1, a kind of embodiment of low Electronic power batteries charging method in the embodiment of the present invention, described method comprises:
101, with the first current value for battery charges.
Be the battery charging incipient stage; with the first current value charging; the size of the first current value sets according to actual needs; meet the requirement of safe charging, common, adopt trickle charge for battery starts period; the current value of trickle current is about 50mA; to reach the object of protection battery, as those skilled in the art, should understand.
102, obtain the voltage difference within the unit interval of described battery or obtain the current charged state of described battery.
Obtain cell voltage whether to change, or the charged state that battery is current, said charged state refers to that the inside of power management integrated circuit is for identifying a kind of status indicator of battery charge condition herein, there are three states in usual battery: trickle charge state, constant current charge state and constant voltage charge state, the charged state of battery can be recognized by obtaining this status indicator in time.
It should be noted that, the collection of cell voltage can realize with overvoltage detection circuit, and those of ordinary skill in the art should understand, and hereinafter repeat no more.
103, judge whether described voltage difference or charged state meet first pre-conditioned, if then perform 104, perform 102 if not.
104, with the second current value be described battery charging, wherein, described second current value is greater than the first current value.
Judge whether voltage difference or charged state meet first pre-conditioned, the first pre-conditioned electricity that can be understood as battery does not change or declines to some extent, specifically, if charging current only can maintain internal circuit consumption, so the electricity of battery can maintain dynamic equilibrium, if charging current is not enough to holding circuit consumption, so the electricity of battery can decline, when judge voltage difference or charged state reach first pre-conditioned time then promote an electric current class, with the second current value for battery charges, because the second current value is greater than the first current value, can be understood as the charging class improving electric current.
It should be noted that, step 101,102,103 can circulate execution, after namely completing a set of flow process, then rejudges voltage difference or the charged state of battery, if or meet first pre-conditioned, then continuing to improve current value is battery charging.
In the present embodiment, with the first current value for battery charges, obtain the voltage difference within the unit interval of described battery or obtain the current charged state of described battery, judge whether described voltage difference or charged state meet first pre-conditioned, if then with the second current value be described battery charging, wherein, described second current value is greater than the first current value.By to the voltage difference of battery or the detection of charged state, judge that voltage difference or charged state meet first pre-conditioned, then improve charging current, meet the consumption of the inside battery power management integrated circuit when battery low-electricity quantity charges, battery can be allowed to charge when low electricity, reach constant current charge condition as early as possible by raising charging current, shorten the charging interval of low Electronic power batteries.
Incorporated by reference to Fig. 2, for using the voltage difference of battery to judge, the another kind of embodiment of low electricity charging method in the embodiment of the present invention, described method comprises:
201, first magnitude of voltage in a upper moment was gathered;
Adopted the voltage in the voltage of current time and a upper moment to make difference in the present embodiment to judge, be used for judging whether the voltage of battery changes, so the voltage difference between current time and subsequent time also can be utilized herein, also can technical solution problem, meet and can judge whether cell voltage changes, in addition, the time interval between two moment can be determined as required, does not specifically limit.
202, the second magnitude of voltage of current time is gathered;
The magnitude of voltage obtaining battery can be realized by voltage detecting circuit, and those of ordinary skill in the art should understand.
203, the second magnitude of voltage and the first magnitude of voltage are made difference and obtain voltage difference.
Deduct by the second magnitude of voltage the difference that the first magnitude of voltage obtains and judge whether cell voltage changes, if difference is greater than zero, then think that the voltage in battery is raising, if be not more than zero, then think that the charging of the first current value only can meet the need for electricity of circuit self in battery, unnecessary electricity can not be had to complete battery charging, so need the class of raising charging current.
204, judge whether the voltage difference of described battery within the unit interval is not more than zero, if so, then determine satisfied first pre-conditioned and perform step 205, if not, then perform 201.
Described first is pre-conditionedly not more than zero for voltage difference, judge that voltage difference is not more than zero herein, obtain because this voltage difference utilized the voltage in current time and a upper moment to make difference, if adopt the voltage of current time and subsequent time poor, voltage difference should be changed into and be not less than zero, the judgement that the voltage that could meet battery does not raise, so can choose flexibly as required when applying.
It should be noted that, if judge voltage difference meet first pre-conditioned time, then represent that the voltage of battery has rising, maintenance first current value now can be selected to charge.
205, with the second current value for battery charges, described second current value is greater than the first current value;
When judge voltage difference reach first pre-conditioned time then promote an electric current class, with the second current value for battery charges, because the second current value is greater than the first current value, can be understood as the charging class improving electric current, battery charge time is shortened, avoids the problem that can not be full of for a long time that inside battery circuitry consumes electricity brings.
It should be noted that, step 201 can to circulate execution to 205, after namely completing a set of flow process, then rejudges voltage difference or the charged state of battery, if or meet first pre-conditioned, then continuing to improve current value is battery charging.
In the present embodiment, with the first current value for battery charges, obtain the voltage difference within the unit interval of described battery or obtain the current charged state of described battery, judge whether described voltage difference or charged state meet first pre-conditioned, if then with the second current value be described battery charging, wherein, described second current value is greater than the first current value.By the detection to cell voltage difference, judge that voltage difference meets first pre-conditioned, then improve charging current, meet the consumption of the inside battery power management integrated circuit when battery low-electricity quantity charges, battery can be allowed to charge when low electricity, reach constant current charge condition as early as possible by raising charging current, shorten the charging interval of low Electronic power batteries.
Incorporated by reference to Fig. 3, judge for employing voltage difference, the another kind of embodiment of low electricity charging method in the embodiment of the present invention, described method comprises:
301, first magnitude of voltage in a upper moment was gathered;
302, the second magnitude of voltage of current time is gathered;
303, the second magnitude of voltage and the first magnitude of voltage are made difference and obtain voltage difference.
304, judge whether the voltage difference of described battery within the unit interval is not more than zero, if then determine that described voltage difference meets the first pre-conditioned execution 305, perform 301 if not.
Described first is pre-conditionedly not more than zero for voltage difference, and described to judge whether described voltage difference meets first pre-conditioned.
305, with the second current value for battery charges, described second current value is greater than the first current value.
Above steps and step 201 similar to 205, do not repeat herein.
306, the current voltage of described battery is obtained;
Utilize voltage detecting circuit to obtain the current voltage of battery, the situation of change of battery electric quantity can be understood.
307, judge whether described current voltage reaches second pre-conditioned, if then perform 308, if not, perform 301.
308, charge with the 3rd current value.
Second pre-conditionedly reaches changing voltage for described current voltage, changing voltage refers in battery charging process, the critical voltage required for constant current charge is converted to by trickle charge, but then can carry out continuous current charging to battery when reaching changing voltage, 3rd current value is constant current charge current value, judge whether described current voltage reaches changing voltage, if then charge with constant current charge current value.
309, voltage detecting circuit is closed.
After battery enters constant current charge state, maintain continuous current to charge, now do not need to detect to judge whether the electricity of battery changes to the voltage of battery again, close voltage detecting circuit and can save a part of electric quantity consumption, and then can the charging interval be shortened.
In the present embodiment, add the judgement to changing voltage, to make when battery reaches changing voltage time to charge with more big current value, while not damaging battery, shorten the charging interval of battery, in addition, meet the consumption of the inside battery power management integrated circuit when battery low-electricity quantity charges, battery can be allowed to charge when low electricity, reach constant current charge condition as early as possible by raising charging current, shorten the charging interval of low Electronic power batteries.
Incorporated by reference to Fig. 4, for the judgement of battery charging state, the another kind of embodiment that in the embodiment of the present invention, low electricity charging method provides, described method comprises:
401, configuration each time interval obtained between described battery present charge state.
Can adopt the charged state of timing acquisition battery, also can adopt the mode of not timing, specifically not limit, the time interval can adopt the RTC clock of battery management IC interior to provide, and RTC i.e. (Real-TimeClock) real-time clock.
402, battery present charge state is obtained;
Said charged state refers to that inside battery is for identifying a kind of status indicator of battery charging state herein, there are two states in usual battery: trickle charge state and constant current charge state, the charged state of battery can be recognized by obtaining this status indicator in time.
403, judge whether the current charged state of described battery does not reach constant current charge state, if then perform 404, then performs 406 if not.
Described first does not pre-conditionedly reach constant current charge state for current charged state, does not reach constant current charge state if meet, and determines satisfied first pre-conditioned.
404, with the second current value be described battery charging.
405, RTC clock supervision is closed.
406, with the 3rd current value be described battery charging.
When charged state reaches constant current charge state time, do not need to carry out timing acquisition for detection charged state again, close RTC clock, a part of electric quantity consumption can be reduced, shorten the charging interval.
In the present embodiment, with the first current value for battery charges, obtain the charged state that described battery is current, judge that whether charged state meets first pre-conditioned, if then with the second current value be described battery charging, wherein, described second current value is greater than the first current value, 3rd current value is greater than the second current value, 3rd current value is the larger constant current charge electric current of current value, by the detection to battery charging state, judge that charged state meets first pre-conditioned, then improve charging current, meet the consumption of the inside battery power management integrated circuit when battery low-electricity quantity charges, battery can be allowed to charge when low electricity, constant current charge condition is reached as early as possible by raising charging current, shorten the charging interval of low Electronic power batteries.
Be described the low electricity charging method in the embodiment of the present invention above, be described below, refer to Fig. 5 to the power management integrated circuit in the embodiment of the present invention, in the embodiment of the present invention, power management integrated circuit embodiment comprises:
Supply module 501, acquisition module 502, judge module 502;
Described supply module 501, for the first current value for battery charges;
In the charging incipient stage, supply module 501 adopts the first current value to be battery charging, and supply module 501 realizes the function providing the current value of different numerical value, can adopt designs more of the prior art, not limit this.
Described acquisition module 502, for obtaining the voltage difference within the unit interval of described battery or obtaining the current charged state of described battery, and sends to described judge module 503.
Acquisition module 502 can adopt voltage detecting circuit to realize the detection to voltage difference and battery charging state, difference can be made by the voltage in two moment for voltage difference to obtain, charged state weighs a kind of status indicator of charge condition in battery charging process, sends after acquisition module collects voltage difference or battery charging state to judge module 503.
Described judge module 503, first pre-conditioned for judging whether described voltage difference or charged state meet, if then supply module 501 is the charging of described battery with the second current value, wherein, described second current value is greater than the first current value.
Judge module 503 pre-conditionedly to compare according to the voltage difference received or charged state and first, judge whether voltage difference or charged state meet first pre-conditioned, when judged result is yes, account for voltage difference or charged state meet first pre-conditioned, supply module 501 with the second current value for battery charges, certainly, in period when judged result is for when being, need to communicate between judge module 503 with supply module 501, notice supply module 501 changes charging current, how it will be understood by those skilled in the art that specifically communicates does not limit.
In the present embodiment, supply module 501 with the first current value for battery charges, acquisition module 502 obtains the voltage difference in the battery unit interval or obtains the charged state of battery and send to judge module 503, it is first pre-conditioned that judge module 503 judges whether the voltage difference that acquisition module 502 collects or charged state meet, if then supply module 501 with the second current value for battery charges, the consumption of the inside battery power management integrated circuit when battery low-electricity quantity charges is met by raising charging current, battery can be allowed to charge when low electricity, constant current charge condition is reached as early as possible by raising charging current, shorten the charging interval of low Electronic power batteries.
Incorporated by reference to Fig. 6, for the method adopting voltage difference, in the embodiment of the present invention, the another kind of embodiment of battery management integrated circuit comprises:
Supply module 601, for the first current value for battery charges.
First acquiring unit 602, for gathering first magnitude of voltage in a upper moment and gathering the second magnitude of voltage of current time.
First acquiring unit can adopt voltage detecting circuit to realize the collection to charging voltage, it should be noted that, in the present embodiment, the magnitude of voltage of a moment and current time in first acquiring unit collection, can certainly the magnitude of voltage of just current time and subsequent time, can choose flexibly during practical application.
First arithmetic element 603, for receive first acquiring unit 602 gather the first magnitude of voltage and the second magnitude of voltage, and the second magnitude of voltage and the first magnitude of voltage are done differ from obtain voltage difference.
In time gathering the voltage of subsequent time and current time, then make difference with the voltage of subsequent time and the voltage of current time and obtain voltage difference.
First judging unit 604, for judging that the voltage difference of described battery within the unit interval is not more than zero;
Mentioning the unit interval in the present embodiment can be understood as time interval between a moment and current time, using this time interval as the unit interval, situation that is equal or that reduce was there is in the voltage that voltage difference is not more than zero explanation current time compared with the voltage in a upper moment, namely current charging current only can maintain the electricity consumption of battery management integrated circuit, and more electricity are not battery charging.
First determining unit 605, satisfied first pre-conditioned for determining when the first judging unit judged result is for being.
Judged result is transferred to the first determining unit 605 by the first judging unit 604, determines satisfied first pre-conditioned when judged result is for being.
When meet first pre-conditioned time, supply module with the second current value for battery charges.
Second acquisition unit 606, obtains the current voltage of described battery.
The current voltage of second acquisition unit 606 Real-time Collection battery, and current voltage is transferred to the second judging unit, second acquisition unit can adopt voltage detecting circuit to realize the collection to cell voltage equally.
Second judging unit 607, for judging whether described current voltage reaches second pre-conditioned.
Second judging unit 607 presets second pre-conditioned, and second pre-conditionedly reaches changing voltage for current battery level, and changing voltage by the agency of hereinbefore, therefore not to repeat here.
Described current voltage reach second pre-conditioned time, supply module 601 with the 3rd current value for battery charges.
Now the 3rd current value is constant current charge electric current, and the 3rd current value is greater than the second current value, and when cell voltage reaches changing voltage time, supply module 601 can adopt the larger continuous current of current value to be battery charging, can shorten the charging interval further like this.
In the present embodiment, by adding the judgement to changing voltage, when cell voltage reaches changing voltage time, 3rd current value that current value can be adopted larger is battery charging, both ensure that the safety of battery charging process, do not damaged battery, and also can shorten the charging interval of battery further.
Incorporated by reference to Fig. 7, for the method utilizing battery charging state, in the embodiment of the present invention, the another kind of embodiment of power management integrated circuit comprises:
Supply module 701, for the first current value for battery charges;
First timing unit 702, for configuring each time interval obtained between described battery present charge state.
In the present embodiment, satisfied first pre-conditioned by judging whether the detection of battery charging state, timing can be adopted to detect, timing detects battery charging state, RTC clock circuit is all carried in power management integrated circuit, timing can be carried out by this RTC clock circuit for obtaining battery charging state, RTC clock circuit configures the required time interval.
Acquisition module 703 obtains the charged state of battery, and this charged state is sent to the 3rd judging unit 704.In charging process, battery management IC interior is provided with the status indicator for identifying present charge state, just can grasp charged state residing for present battery by obtaining this status indicator.
3rd judging unit 704, for judging whether the current charged state of described battery does not reach constant current charge state.
If the 3rd judging unit judges that charged state does not reach constant current charge state, illustrate that the voltage of inside battery does not also reach changing voltage, now need to improve charging current value, if reached constant current charge state, then do not need to promote charging current again, so the condition judged is set as not reaching constant current charge state.
Second determining unit 705, satisfied first pre-conditioned for determining when the 3rd judging unit judged result is for being.
The result judged when the 3rd judging unit is be, shows that the charged state of present battery does not also reach constant current charge state, now meets first pre-conditioned.
When battery charging state meet first pre-conditioned time, supply module 701 is with the second current value for battery charges, and the second current value is greater than the first current value.
In the present embodiment, the charge condition of battery is judged by the charged state obtaining battery, save the process by obtaining cell voltage, simply and easily realize, the monitoring of charging process is simplified, in time judging that charged state does not reach constant current charge state, then raising charging current, meet the consumption of the inside battery power management integrated circuit when battery low-electricity quantity charges, battery can be allowed to charge when low electricity, shorten the charging interval of low Electronic power batteries.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, storage medium can comprise: read-only memory (ROM, ReadOnlyMemory), random access memory (RAM, RandomAccessMemory), disk or CD etc.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
Above the low Electronic power batteries charging method of one provided by the present invention and power management integrated circuit are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a low Electronic power batteries charging method, is characterized in that, described method comprises:
With the first current value for battery charges;
Obtain the voltage difference within the unit interval of described battery or obtain the current charged state of described battery;
Judge whether described voltage difference or charged state meet first pre-conditioned, if be then the charging of described battery with the second current value, wherein, described second current value is greater than the first current value.
2. low Electronic power batteries charging method according to claim 1, is characterized in that, the voltage difference within the unit interval obtaining described battery specifically comprises:
Gathered first magnitude of voltage in a upper moment;
Gather the second magnitude of voltage of current time;
Second magnitude of voltage and the first magnitude of voltage are made difference and obtain voltage difference.
3. low Electronic power batteries charging method according to claim 2, is characterized in that, described first is pre-conditionedly not more than zero for voltage difference, describedly judges whether described voltage difference or charged state meet first and pre-conditionedly specifically to comprise:
Judge whether the voltage difference of described battery within the unit interval is not more than zero, if then described voltage difference meets first pre-conditioned.
4. low Electronic power batteries charging method according to claim 3, is characterized in that, also comprises after being then the charging of described battery with the second current value if described:
Obtain the current voltage of described battery, described current voltage is obtained by voltage detecting circuit;
Judge whether described current voltage reaches second pre-conditioned, if then charge with the 3rd current value.
5. low Electronic power batteries charging method according to claim 4, it is characterized in that, described second pre-conditionedly reaches changing voltage for described current voltage, described 3rd current value is constant current charge current value, describedly judge whether described current voltage reaches second pre-conditioned, specifically comprises if then carry out charging with the 3rd current value:
Judge whether described current voltage reaches changing voltage, if then charge with constant current charge current value.
6. low Electronic power batteries charging method according to claim 1, is characterized in that, also comprises before the charged state that the described battery of described acquisition is current:
Configuration each time interval obtained between described battery present charge state.
7. low Electronic power batteries charging method according to claim 1, it is characterized in that, described first does not pre-conditionedly reach constant current charge state for current charged state, describedly judges whether described voltage difference or charged state meet first and pre-conditionedly specifically to comprise:
Judge whether the current charged state of described battery does not reach constant current charge state, if it is first pre-conditioned then to determine that current charged state meets.
8. a power management integrated circuit, is characterized in that, comprising: supply module, acquisition module, judge module;
Described supply module, for the first current value for battery charges;
Described acquisition module, for obtaining the voltage difference within the unit interval of described battery or obtaining the current charged state of described battery, and sends to described judge module.
Described judge module, first pre-conditioned for judging whether described voltage difference or charged state meet, if then supply module is the charging of described battery with the second current value, wherein, described second current value is greater than the first current value.
9. power management integrated circuit according to claim 8, is characterized in that, described circuit comprises:
First acquiring unit, for gathering first magnitude of voltage in a upper moment and gathering the second magnitude of voltage of current time;
First arithmetic element, for receive first acquiring unit gather the first magnitude of voltage and the second magnitude of voltage, and the second magnitude of voltage and the first magnitude of voltage are done differ from obtain voltage difference;
First judging unit, for judging that the voltage difference of described battery within the unit interval is not more than zero;
First determining unit, first pre-conditioned for determining that when the first judging unit judged result is for being described voltage difference meets;
Second acquisition unit, obtains the current voltage of described battery;
Second judging unit, for judging whether described current voltage reaches second pre-conditioned, with make described current voltage reach second pre-conditioned time described supply module charge with the 3rd current value.
10. power management integrated circuit according to claim 8, is characterized in that, described circuit comprises:
First timing unit, for configuring each time interval obtained between described battery present charge state;
3rd judging unit, for judging whether the current charged state of described battery does not reach constant current charge state;
Second determining unit, first pre-conditioned for determining that when the 3rd judging unit judged result is and is described current charged state meets.
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