CN103792490B - The method measured and calculate system battery electricity - Google Patents

The method measured and calculate system battery electricity Download PDF

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Publication number
CN103792490B
CN103792490B CN201310594575.6A CN201310594575A CN103792490B CN 103792490 B CN103792490 B CN 103792490B CN 201310594575 A CN201310594575 A CN 201310594575A CN 103792490 B CN103792490 B CN 103792490B
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electricity
battery
voltage
current
processes
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CN201310594575.6A
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CN103792490A (en
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刘荣
宋夏
张享隆
郭崇鑫
王业飞
朱长春
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广州视源电子科技股份有限公司
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Abstract

The invention discloses a kind of method measured and calculate battery electric quantity, comprise the following steps: step one, utilize ADC to measure cell voltage method and obtain the reference voltage of battery, it is preferred that by continuous 10 AD conversion and average and obtain reference voltage;Step 2, according to the state of the main current consuming apparatus of system, calculates the compensation voltage of each described main current consuming apparatus;Step 3, calculates the summation compensating voltage of described reference voltage and all described main current consuming apparatus, as the voltage after compensating;Step 4, obtains the corresponding electricity measuring electric quantity as battery according to the voltage after described compensation by voltage electricity relation table;Step 5, updates, with the measuring electric quantity of described battery, the display electricity that battery is current.Use the present invention, can only use ADC voltage measurement battery electric quantity method on the premise of can not obtaining current information, and by the improvement in the method and algorithm so that accuracy of measurement significantly rises, and battery charging and discharging curve is closer to truth.

Description

The method measured and calculate system battery electricity

Technical field

The present invention relates to a kind of computer automation measuring method, particularly relate to a kind of measurement and calculating electricity The method of pond electricity.

Background technology

In panel computer, mobile phone etc. use the equipment of battery, it is typically necessary display present battery Electricity.Occasion exigent for certainty of measurement, the special chip such as coulometer to be used.Storehouse Logical sequence meter, by measuring the voltage of battery, charge/discharge current, can accurately calculate battery storage and consumption Energy, thus draw current battery charge.

In order to cost-effective, for the consumption electronic product that required precision is not the highest, the most not This kind of special coulant meter chip can be used, but use the method only measuring cell voltage by ADC Measure and calculate battery electric quantity.The principle of the method is, battery is under different electricity, and it exports Voltage is different.Electricity is the most, and voltage is the highest, and on the contrary, electricity is the fewest, and voltage is the lowest. But practical situation is, cell voltage list is correlated with electricity, is also correlated with charge/discharge current.And measure Battery current is again that relatively difficult, the most general consumption electronic product does not possess battery current measurement Function.So not increasing any algorithm, it is only to calculate battery electric quantity simply by voltage, effect It is excessively poor, has time error even can reach 50% more than.

For the problems referred to above, the voltage that some design just adds under different scene on this basis is mended Repay function.By to the voltage measurement under different scenes, recording voltage compensation value, then recording Compensate according to different patterns after virtual voltage.Owing to voltage pulsation is relatively big, voltage compensation is the most very Difficulty is made accurately, the computing such as therefore typically also can simply average result of calculation, makes knot Fruit seems more steady.

To sum up, the major defect of prior art includes:

If 1 uses special coulometer chip, the most relatively costly, take around increase by 0.5~1 U.S. dollar;

2, not using coulometer chip, battery curve is unsmooth, electricity display error big, fluctuation is big, Such as before and after restarting systems, battery electric quantity deviation is very big, charging time electricity rapid increase, pull out and fill Electrical equipment electricity rapid decrease etc..

Summary of the invention

Present invention mainly solves under no current measures the restriction of function, only use voltage system to survey online The problem that amount battery electric quantity deviation is big and the fluctuation of battery charging and discharging curve is big.

For achieving the above object, the invention discloses a kind of method measured and calculate system battery electricity, Specifically include following steps:

Step one, utilizes ADC to measure cell voltage method and obtains the reference voltage U of battery;

Step 2, according to the state of the main current consuming apparatus of system, depends on each described main current consuming apparatus The compensation voltage of each described main current consuming apparatus is calculated according to below equation;

When battery is in discharge condition: UCompensate voltage=UCompensate side-play amount+F(U)*VCurrency/VMaximum,

When battery is in charged state: UCompensate voltage=UCompensate side-play amount-F(U)*VCurrency/VMaximum

Wherein, VCurrencyIt is the value of current main current consuming apparatus correspondence attribute, VMaximumIt it is described corresponding genus Property accessible maximum, F (U) is the function with described reference voltage as parameter, represents according to current The maximum that described reference voltage calculates when main current consuming apparatus operates in described corresponding attribute maximum is mended Repay voltage;UCompensate side-play amountFor compensating side-play amount, the state phase that its size current consuming apparatus main with system is current Close;

Step 3, calculate described reference voltage and all described main current consuming apparatus compensates the total of voltage With, as the voltage after compensating;

Step 4, obtains corresponding electricity according to the voltage after described compensation by voltage-capacity relation table Measuring electric quantity as battery;

Step 5, updates, with the measuring electric quantity of described battery, the display electricity that battery is current.

Described main current consuming apparatus at least includes LCD backlight, CPU and GPU;For LCD backlight, Described corresponding attribute is LCD backlight brightness, and for CPU, described corresponding attribute is that CPU runs frequency Rate value, for GPU, described corresponding attribute is GPU running frequency value.

The present invention is different from some schemes not using current measurement equally only in accordance with several specific application Scene carrys out setting compensation value, but calculates for selected main current consuming apparatus, it is possible to obtain relatively For voltage compensation value accurately.

In order to solve further, the display electricity error of described battery is big, battery curve is unsmooth, fluctuation The problem such as big, between described step 4 and step 5, it is also possible to include the electricity of the measurement to described battery Amount is carried out in anti-bounce-back process, slope restriction process, simulation discharge and recharge process, electricity Filtering Processing One or more, and/or include processing independent of the preservation electricity of step one to step 5.Wherein said Each item that anti-bounce-back process, slope restriction process, simulate in discharge and recharge process, electricity Filtering Processing When processing, all using the output electricity of the next item up process as currently processed input electricity, and ought The input electricity that the output electricity of pre-treatment processes as the next item down, the process being connected with described step 4 Input electricity be through described step 4 process after measuring electric quantity, the process being connected with described step 5 Output electricity as the measuring electric quantity in described step 5.

Described anti-bounce-back processes and specifically includes: it is right to be carried out by display electricity current with battery for input electricity Ratio, when battery is in discharge condition, if the display electricity that described input electricity is current more than described battery Amount, then use the current display electricity of described battery as output electricity;When battery is in charged state Time, if the display electricity that described input electricity is current less than described battery, then use described battery current Display electricity is as described output electricity;Other situations use described input electricity as output electricity.

Described slope restriction processes and specifically includes: carried out by display electricity current with battery for input electricity Contrast, if described input electricity ninThe display electricity n current more than described batterym, then electricity is exported For nout=(int) ((nin-nm)/N+1)+nm;If described input electricity ninLess than described display Electricity nm, then output electricity is nout=(int) ((nin-nm)/N-1)+nm;If described input electricity Amount ninEqual to described display electricity nm, output electricity is: nout=nin;Wherein nin noutAnd nmFor with hundred Dividing the numerical value before percentage sign when making display, N is one and adjusts in real time according to current working current size Coefficient.

Existing technology is used is the mode of fixed slope, and i.e. no matter charging and discharging currents is how many, All use fixing slope.The present invention then can according to the dynamic the tuned slope of current charging and discharging currents, from And closer to truth.

Described simulation discharge and recharge processes and specifically includes: when system detects that the current display electricity of battery exists Do not change in a period of time, if system is in charged state, then calculates and simulate in the charge state The required duration t of chargingc, at tcIn the range of duration, by described input electricity ninAdd according to time per unit The speed change of 1 is as output electricity;If system is in discharge condition, then calculate mould in the discharged condition Intend the required duration t of electric discharged, at tdIn the range of duration, by described input electricity ninAccording to time per unit The speed change subtracting 1 is as output electricity, wherein said ninDuring for representing with hundred-mark system before percentage sign Numerical value.

Described electricity Filtering Processing specifically includes: the value of input electricity is joined filtering queue end, By a data deletion the earliest in queue, then all values in filtering queue is averaged as defeated Go out electricity.

Present invention uses queue-type Filtering Processing rather than common average value filtering mode, use This mode not only can numerically produce filter effect, the most also can produce filter effect.

Described preservation electricity processes and includes step: detecting that the current display electricity of battery changes, Or exceed Preset Time, or during user's modification time, described display electricity and time letter will be preserved Breath is to file system, with the survey calculation of electricity during participation system boot next time.During system boot next time, Then and the most calculated from file system, last information about power and temporal information are first loaded, Electricity and time contrast, if electricity is more or less the same, and the time changes not less than the value specified, then recognize Information about power for being loaded into from file system is effective, and follow-up calculating is carried out the most on this basis, If electricity deviation is relatively big, the most direct current calculated charge value of use, ignore and store before Information about power.

The embodiment of the present invention is to be solved be technical problem is that on the premise of can not obtaining current information, For only using ADC voltage measurement battery electric quantity method, and by the improvement in the method and algorithm, Making accuracy of measurement significantly increase, battery charging and discharging curve is closer to truth, thus significantly Promote user's experience.

Implement the embodiment of the present invention, have the advantages that

1, contrast uses special coulometer chip or increases the scheme of current measurement, and the present invention increases hardly Adding extra cost, the ADC directly using chip to carry can complete battery electric quantity measurement function;

2, contrasting the scheme that similar no current is measured, mending because present invention uses the most accurate voltage Compensation method and algorithm, so the result that the present invention records is the most accurate;

3, the scheme that similar no current is measured is contrasted, owing to present invention uses preferable algorithm and intelligence Can parameter adjustment function, such as dynamically slope limitation function, simulation discharge and recharge processing procedure, queue Formula Filtering Processing etc. so that the battery charging and discharging curve that the present invention obtains is closer to truth;

4, contrast similar measurement scheme, have benefited from electricity preservation of the present invention and process and start pre-loaded function, The present invention starts shooting or restarts at once after shut down, and electricity will not suddenly change.

Accompanying drawing explanation

Fig. 1 is the flow chart of one embodiment of the present of invention.

Fig. 2 is that the embodiment of the present invention calculates the flow chart compensating voltage.

Fig. 3 be the embodiment of the present invention table look-up acquisition measuring electric quantity flow chart.

Fig. 4 is the flow chart of an alternative embodiment of the invention.

Fig. 5 is the embodiment of the present invention anti-bounce-back process chart.

Fig. 6 is that embodiment of the present invention slope limits process chart.

Fig. 7 is that the embodiment of the present invention simulates discharge and recharge process chart.

Fig. 8 is embodiment of the present invention electricity Filtering Processing flow chart.

Fig. 9 is that the embodiment of the present invention preserves electricity process chart.

Figure 10 is embodiment of the present invention start preload process flow chart.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this Invention is described in further detail.

As it is shown in figure 1, be the flow chart of one embodiment of the invention, specifically include step:

S11, utilizes ADC to measure cell voltage method and obtains the reference voltage of battery, it is preferred that pass through Continuous 10 AD conversion are also averaged and are obtained reference voltage;

S12, according to the state of the main current consuming apparatus of system, calculates the benefit of each described main current consuming apparatus Repay voltage;

S13, calculates the summation compensating voltage of described reference voltage and all described main current consuming apparatus, As the voltage after compensating;

S14, obtains corresponding electricity conduct according to the voltage after described compensation by voltage-capacity relation table The measuring electric quantity of battery;

S15, updates, with the measuring electric quantity of described battery, the display electricity that battery is current.

Wherein, in described step S12, main current consuming apparatus is according to different different the setting of Systematic selection Standby.Such as in panel computer, LCD backlight and CPU, GPU are main current consuming apparatus, power consumption Do not fix.Therefore by measuring different LCD backlight brightness, cpu frequency, GPU frequency in difference Voltage deviation value under cell voltage, then by curve matching, obtains the data of some key points, Then voltage can be calculated further according to actual LCD backlight brightness, cpu frequency, GPU frequency Offset, such that it is able to accurately calculate battery electric quantity.

Assume current by ADC measurement to cell voltage be U, then can by the voltage after compensation It is expressed as Uc=U+Ublc+Ucpuc+Ugpuc.Wherein UcFor the voltage after compensating, UblcFor LCD backlight Compensate voltage, UcpucVoltage, U is compensated for CPUgpucVoltage is compensated for GPU.

LCD backlight compensates voltage Ublc=Ubl_offset+Fbl(U)*Vbl/Vblmax, wherein Ubl_offsetFor compensating Side-play amount, the most relevant to actual system, the battery that used etc., need actual measurement to determine;FblIt is one Individual function, it can calculate the offset of high-high brightness, this function and reality according to current voltage value LCD backlight, the battery used etc. are the most relevant, need actual measurement to determine;VblIt it is current LCD backlight Brightness value, VblmaxIt it is backlight maximum.

CPU compensates voltage Ucpuc=Ucpu_offset+Fcpu(U)*Vcpu/Vcpumax, wherein Ucpu_offsetFor mending Repay side-play amount, the most relevant to actual system, the battery that used etc., need actual measurement to determine;Fcpu Being a function, it can calculate offset during maximum cpu frequency, this letter according to current voltage value Number and actual CPU, the battery used etc. are the most relevant, need actual measurement decision;VcpuIt is current CPU Running frequency value, VcpumaxIt it is the frequency maxima of CPU operation.

GPU compensates voltage Ugpuc=Ugpu_offset+Fgpu(U)*Vgpu/Vgpumax, wherein Ugpu_offsetFor mending Repay side-play amount, the most relevant to actual system, the battery that used etc., need actual measurement to determine;Fgpu Being a function, it can calculate offset during maximum GPU frequency, this letter according to current voltage value Number and actual GPU, the battery used etc. are the most relevant, need actual measurement decision;VgpuIt is current GPU Running frequency value, VgpumaxIt it is the frequency maxima of GPU operation.

When charging, it is also desirable to calculate charging according to LCD backlight, cpu frequency, GPU frequency etc. The offset of voltage.Because in systems, the total current that charger provides is fixing, when system is transported When the electric current of needs is big during row, can automatically reduce charging current.And different charging currents, even if In the case of battery capacity is identical, cell voltage is the most different, it is therefore desirable to does voltage for charging and mends Repay.Computing formula when charging voltage compensation calculation formula and electric discharge is the most essentially the same, different Place is, when backlight/CPU/GPU electric current increases, compensates voltage and reduces, the parameter therefore used Different.The computing formula used during charging is in form: Ublc=Ubl_offset-Fbl(U)*Vbl/Vblmax; Ucpuc=Ucpu_offset-Fcpu(U)*Vcpu/Vcpumax;Ugpuc=Ugpu_offset-Fgpu(U)*Vgpu/Vgpumax

Furthermore, it is contemplated that USB port is when connecting computer and charger, it is possible to the maximum current got Being different, this directly influences whether the measurement of battery electric quantity during charging.Therefore increase in the design Add the function of feeder ear detection, when different feeder ears being detected, different compensation can have been used to join Number.As preferably detecting according to being, when connecting computer, computer can carry out data communication with equipment, And when connecting charger, do not have data communication.

For convenience of understanding, by Fig. 2, voltage compensation handling process will be described below.

Assume that the voltage recorded by ADC measurement voltage method is U;

S131, it may be judged whether have external power source to input, if it has, then enter step S132, otherwise, Enter step S134;

S132, it is judged that whether the external power source of connection is computer, if it is, enter step S133, no Then, step 135 is entered;

S133, calculates LCD backlight under computer model and compensates voltage Ublc, CPU compensate voltage Ucpuc、 GPU compensates voltage Ugpuc

S134, calculates LCD backlight under discharge mode and compensates voltage Ublc, CPU compensate voltage Ucpuc、 GPU compensates voltage Ugpuc

S135, calculates LCD backlight under charge mode and compensates voltage Ublc, CPU compensate voltage Ucpuc、 GPU compensates voltage Ugpuc

S136, according to formula Uc=U+Ublc+Ucpuc+UgpucCalculate the voltage after compensating.

Fig. 3 show in step S14 to table look-up and obtains the idiographic flow of battery electric quantity, specifically includes step:

S141, it is judged that whether battery is in charged state, if being in charged state, then enters step Rapid S142, otherwise enters step S143;

S142, obtains the measuring electric quantity of present battery, and enters step S144 by looking into charging voltage table;

S143, obtains the measuring electric quantity of present battery, and enters step S144 by looking into discharge voltage table;

S144, returns the measuring electric quantity of present battery.

Although the display electricity that embodiment obtains as shown in Figure 1, by intending main current consuming apparatus Close voltage compensation curve, it is thus achieved that battery electric quantity more accurately, but if on the basis of this embodiment On add anti-bounce-back process, slope restriction process, simulation discharge and recharge process, electricity Filtering Processing with And preserve electricity process in one or more, it will obtain closer to the truth and meet people The result of psychology.

As shown in Figure 4, for the flow chart of another embodiment of the present invention.

S1, obtains battery measurement electricity: identical with the step S11 to S14 of first embodiment, according to The reference voltage utilizing ADC measurement cell voltage method to obtain is carried out by the state of the main current consuming apparatus of system Voltage compensation, and the measuring electric quantity of battery is determined according to the voltage after compensating.

S2, anti-bounce-back processes: assume that currently displaying electricity is nmIf put it has been acknowledged that battery is in Electricity condition, such as, be not connected with charger bright screen and run, then for being calculated more than nmResult should This to abandon, and otherwise battery not in charging but understand to the experience of the no good cake of user in rising by battery electric quantity, The most directly use value n of currently displaying electricitymThe result processed as this step;Equally, if it is confirmed that Battery is in charged state, and calculated electricity is less than nm, the most also to abandon, prevent battery from filling The situation that during electricity, battery electric quantity declines on the contrary occurs, and the most also uses value n of currently displaying electricitymMake The result processed for this step;For other situations, use the measuring electric quantity obtained through S1 step as this The result that step processes.

S3, slope restriction processes: the most directly uses the result through step S2, and is based on current Display electricity, is further adjusted the electricity after step S2 processes.Currently fill according to system Discharge condition and the state of main current consuming apparatus, calculate electric quantity change rate N, utilize this to become Rate limits the amplitude of electric quantity change, pins down the rapid fluctuations of battery electric quantity in time.It is assumed that The result that described step S2 processes is denoted as nin, currently displaying electricity is denoted as nm.Work as ninCompare nm Time big, according to formula ((int) (nin-nm)/N+1)+nmDescribed step S2 result is adjusted further; Work as ninCompare nmHour, according to formula ((int) (nin-nm)/N-1)+nmDescribed step S2 result is entered One successive step;Work as ninEqual to nmTime, do not adjust;Wherein ninAnd nmFor showing with hundred-mark system Time percentage sign before numerical value.

S4, simulation discharge and recharge processes: if system detects that the described display electricity long period becomes Dynamic, and in the case of the charging and discharging state of the clearest and the most definite battery, make described after step S3 processes Electricity is within the time determined according to system current state, with less than change during normal discharge and recharge Amplitude changes.Owing to the charge/discharge rates of simulation is slower than actual charge/discharge rates, therefore a period of time After, calculated electricity can be gradually close to the electricity of display, and finally the two is equal.Such place When reason makes user feel charging, battery electric quantity rises than relatively evenly, and during electric discharge, battery electric quantity ratio is more uniform Ground declines.

S5, electricity Filtering Processing: the electricity obtained after above step adjusts is joined and puts down Sliding filtering queue, and by a data deletion the earliest in queue, then average and be calculated Whole battery electric quantity.And be used for updating described display electricity by result.

S6, preserves electricity and processes: detecting that the current display electricity of battery changes, or away from Preserved from last time and exceed Preset Time, or during user's modification time, presently described display electricity will be preserved The value of amount and temporal information are to file system, with the survey calculation of electricity during participation system boot next time.

Wherein said anti-bounce-back processes the concrete steps of S2 as shown in Figure 5:

Before performing described anti-bounce-back process S2, the result first loading acquisition battery measurement process is made The input electricity processed for anti-bounce-back;Described anti-bounce-back processes and specifically includes step:

S21, it is judged that whether battery is in charged state.If battery is in charged state, then enter Step S22, otherwise enters step S23;

S22, it is judged that whether input electricity is less than display electricity, if it does, enter step S24, Otherwise, step S25 is entered;

S23, it is judged that whether input electricity is more than display electricity, if it does, enter step S24, Otherwise, step S25 is entered;

S24, is assigned to the value of currently displaying electricity export electricity;

S25, is assigned to export electricity by the value of input electricity.

After using above process, although the accuracy that battery electric quantity is measured can be effectively improved, but imitate Fruit or not ideal enough.Main cause is that system complexity is the highest, it is impossible to the most accurately will be all Module ruuning situation is converted into voltage compensation value, and its characteristic of different batteries is the most different, then adds Upper ADC measurement error etc., the result fluctuating margin finally obtained is the biggest.In view of battery electricity Amount can not be undergone mutation, and therefore the result after said method processes is entered by the embodiment of the present invention again Line slope restriction process and electricity Filtering Processing, pin down the rapid fluctuations of battery electric quantity in time. Described slope restriction process concrete steps as shown in Figure 6:

Before performing described slope restriction and processing step, the output electricity of first load step S2 is as tiltedly The input electricity n that rate restriction processesin;Described slope restriction processes and includes step:

S31, it is judged that input electricity ninWhether more than display electricity nm, if it is, enter step S32, Otherwise, step S34 is entered;

S32, according to LCD backlight brightness Vbl, CPU running frequency Vcpu, the running frequency of GPU VgpuAnd whether connect computer slope calculations coefficient N;

S33, exports electricity noutFor nout=((int)(nin-nm)/N+1)+nm

S34, it is judged that input electricity ninWhether less than display electricity nm, if it is, enter step S35, Otherwise, step S37 is entered;

S35, according to LCD backlight brightness Vbl, CPU running frequency Vcpu, the running frequency of GPU VgpuAnd whether connect computer slope calculations coefficient N;

S36, exports electricity noutFor nout=((int)(nin-nm)/N-1)+nm

S37, is assigned to export electricity by the value of input electricity.

Preferably, in step s 32, the calculation of N is as follows:

Charged state: N=10+ (30*Vbl/Vblmax)+(10*Vcpu/Vcpumax)+(10*Vgpu/Vgpumax),

Discharge condition: N=60-(30* (Vbl)/Vblmax)-(10*Vcpu/Vcpumax)-(10*Vgpu/Vgpumax),

The wherein value of numeral, will be adjusted according to actual battery, backlight, CPU, GPU.

After using such algorithm, the maximum rate of change of battery electric quantity is limited, thus reaches good Smooth effect.

Electric discharge a period of time and battery do not discharge after be inserted into charger or charging a period of time and The most suddenly it is transferred to low after just disconnecting charger or long-time heavy-duty service during battery underfill Load operation etc., these time electricity only be most difficult to calculate by voltage, the most all can occur partially The situation that difference is bigger.Owing to adding anti-bounce-back measure, when situation about generally occurring within is exactly to grow very much one section The battery electric quantity of interior display is held at same level, and actually battery is in charge or discharge 's.For this situation, the present embodiment uses simulation discharge and recharge to process, according to slower than normal discharge and recharge Speed carry out simulated battery charge and discharge process.Owing to the charge/discharge rates of simulation is bound to fill than actual The velocity of discharge is slow, and therefore after a period of time, calculated charge value can be gradually to the charge value of display Close, final display electricity is by equal with the charge value calculated.It is concrete that described simulation discharge and recharge processes Step is as shown in Figure 7:

Before performing described simulation discharge and recharge and processing step, first load the result conduct that anti-bounce-back processes The input electricity n of simulation discharge and rechargein;Described simulation discharge and recharge processes and includes step:

S41, it is judged that whether display electricity changes, if it is, enter step S42, otherwise, Enter step S43;

S42, resets timer Ts, and enter step S411;

S43, it is judged that whether battery is in charged state, if it is, enter step S44, otherwise, enters Enter step S45;

S44, calculates under conditions present, and charging should produce the time t of changec, and enter step S46;

S45, it is judged that whether battery is in discharge condition, if it is, enter step S47, otherwise, enters Enter step S411;

S46, it is judged that TsWhether more than tc, if it is, enter step S48, otherwise enter step S411;

S47, calculates under conditions present, and electric discharge should produce the time t of changed, and enter step S49;

S48, calculates output electricity nout=nin+ 1, reset timer Ts, and enter S412;

S49, it is judged that TsWhether more than td, if it is, enter step S410, otherwise enter step S411;

S410, calculates output electricity nout=nin-1, reset timer Ts, and enter step S412;

S411, is assigned to export electricity by the value of input electricity;

S412, returns output electricity.

After such process, when user can feel charging, battery electric quantity rises than relatively evenly, puts During electricity, battery electric quantity declines than relatively evenly, without there is being in for a long time the situation of same level, Thus improve Consumer's Experience well.

The concrete steps of described electricity Filtering Processing as shown in Figure 8, are performing described electricity Filtering Processing Before step, the result first described simulation discharge and recharge processed is as the input of described electricity Filtering Processing Electricity, described electricity Filtering Processing specifically includes step:

S51, removes value the earliest in filtering queue;

S52, joins queue end by the value of input electricity;

S53, averages to all values in filtering queue and is assigned to export electricity.

By such process so that the fluctuation in positive and negative scope is canceled each other out, thus reaches very Good smooth effect.

After shut down, the software calculating electricity just cannot be properly functioning, and therefore common practice is just for system It is to recalculate battery electric quantity during start every time.Due to some above-mentioned reasons, finally calculate Electricity may be with the electricity deviation more than 10% before shutdown, and this understands the body the worst to client Test.In order to solve this problem, native system is designed with slotting charger automatic turn-on function, and adds institute State preservation electricity to process.As it is shown in figure 9, described preservation electricity process concretely comprise the following steps:

S61, it is judged that whether display electricity changes, if it is, enter step S64, otherwise enters Enter step S63;

S62, it is judged that whether user revises system time, if it is, enter step S64;

S63, it is judged that distance last saved has reached tsaveDuration, if it has, Then enter step S64, otherwise, enter step S66, wherein tsaveIt it is a value set in advance;

S64, preserves current electric quantity information and temporal information to file system;

S65, empties the timer T for recording distance last savednc

S66, preservation completes.

The reference of electricity is calculated as next time when the meaning that described preservation electricity processes is to start shooting.Next time During start, such as, when user manually starts shooting or inserts charger charging start, first load from file system Last electricity and temporal information, then contrast with current calculated battery electric quantity and time.As Really battery electric quantity is more or less the same, and the time changes not less than the value specified, then it is assumed that from file system The battery level information being loaded into is effective, and follow-up calculating is all carried out on this basis.Thus may be used To ensure that user is in the case of restarting or the unused time is not to grow very much, it is ensured that battery electric quantity shows Concordance.If battery electric quantity deviation is relatively big, such as user changes battery, or time deviation is very For a long time or temporal regression, such as after changing battery or long-time shutdown, battery miss out a lot, At this moment when user the most less remembers to shut down for the last time, how many battery electric quantities is, then the most directly Use current calculated charge value, and neglect the information about power stored before.If in start Shi Buneng gets the information about power of last storage, then can only directly use calculated battery electricity Amount.When this situation generally only occurs in plant produced, normally use thus without affecting user.

The concrete steps of described start prestrain as shown in Figure 10, including step:

S71, obtains the measuring electric quantity of battery according to the step of S1;

S72, carries out electricity Filtering Processing by the measuring electric quantity that S71 step obtains according to the step of S5;

S73, it is judged that filtering queue is the fullest, if it is, enter step S74, otherwise, returns step Rapid S71;

S74, loads information about power and temporal information from file system;

S75, it is judged that the information about power loaded from file system is the most effective, if effectively, enters step Rapid S76, does not deals with;

S76, sets the currently displaying electricity charge value as preservation, and uses the charge value of preservation to fill filter Ripple queue;

S77, opening initialization completes.

Except above-mentioned process, the design also uses average voltage, filter the bigger value of variance, The conventional design such as look-up table conversion battery electric quantity, describe in detail the most in the document.It is appreciated that this Invention is to apply in the system that no current is measured, but the processing method that the present invention is to battery electric quantity, aobvious So can be used on system or the coulomb chip of belt current measurement.

Although it should be noted that above-described embodiment employs at described anti-bounce-back in one embodiment Reason, slope restriction process, simulate discharge and recharge process, electricity Filtering Processing and preserve electricity process, But these six process need not necessarily the most all use, and can the most only select it In one or more with optimum results.The most described anti-bounce-back process, slope restriction process, simulation Discharge and recharge process, the processing sequence of electricity Filtering Processing are not inevitable as shown in above-described embodiment, can Corresponding suitably adjustment is made with the needs according to user.

The above is the preferred embodiment of the present invention, it is noted that general for the art For logical technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvement and Retouching, these improvements and modifications are also considered as protection scope of the present invention.

Claims (9)

1. the method measured and calculate system battery electricity, it is characterised in that include following step Rapid:
Step one, utilizes ADC to measure cell voltage method and obtains the reference voltage U of battery;
Step 2, according to the state of the main current consuming apparatus of system, depends on each described main current consuming apparatus The compensation voltage of each described main current consuming apparatus is calculated according to below equation;
When battery is in discharge condition: UCompensate voltage=UCompensate side-play amount+F(U)*VCurrency/VMaximum,
When battery is in charged state: UCompensate voltage=UCompensate side-play amount-F(U)*VCurrency/VMaximum
Wherein, VCurrencyIt is the value of current main current consuming apparatus correspondence attribute, VMaximumIt it is described correspondence The accessible maximum of attribute, F (U) is the function with described reference voltage as parameter, represents according to working as Before described reference voltage calculate maximum when main current consuming apparatus operates in described corresponding attribute maximum Compensate voltage;UCompensate side-play amountFor compensating side-play amount, the shape that its size current consuming apparatus main with system is current State is correlated with;
Step 3, calculate described reference voltage and all described main current consuming apparatus compensates the total of voltage With, as the voltage after compensating;
Step 4, obtains corresponding electricity according to the voltage after described compensation by voltage-capacity relation table Measuring electric quantity as battery;
Step 5, updates, with the measuring electric quantity of described battery, the display electricity that battery is current.
Method the most according to claim 1, it is characterised in that described main current consuming apparatus is at least Including LCD backlight, CPU and GPU;For LCD backlight, described corresponding attribute is the LCD back of the body Brightness, for CPU, described corresponding attribute is CPU running frequency value, for GPU, described right Answering attribute is GPU running frequency value.
Method the most according to claim 1, it is characterised in that in described step 4 and step 5 Between, still further comprise the measuring electric quantity to described battery and carry out at anti-bounce-back process, slope restriction One or more in reason, simulation discharge and recharge process, electricity Filtering Processing, and/or includes independent of step The preservation electricity of rapid one to five processes;Wherein said anti-bounce-back process, slope restriction process, simulation is filled Each item in discharge process, electricity Filtering Processing is when processing, and the output all processed by the next item up is electric Measure as currently processed input electricity, and currently processed is exported what electricity processed as the next item down Input electricity, the input electricity that the next item down being connected with described step 4 processes is through described step everywhere Measuring electric quantity after reason, the output electricity that the next item up being connected with described step 5 processes is as described step Measuring electric quantity in rapid five.
Method the most according to claim 3, it is characterised in that described anti-bounce-back processes concrete bag Include: the display electricity inputting electricity current with battery anti-bounce-back processed contrasts, at battery When discharge condition, if the input electricity that described anti-bounce-back processes is more than the display electricity that described battery is current Amount, then the output electricity that the display electricity using described battery current processes as anti-bounce-back;At battery When charged state, if the input electricity that described anti-bounce-back processes is less than the display electricity that described battery is current Amount, then the output electricity that the display electricity using described battery current processes as described anti-bounce-back;Other The output electricity that the input electricity that situation uses described anti-bounce-back to process processes as anti-bounce-back.
Method the most according to claim 3, it is characterised in that described slope restriction processes concrete bag Include: the display electricity inputting electricity current with battery slope restriction processed contrasts, if institute State the input electricity n that slope restriction processesinThe display electricity n current more than described batterym, then slope limit The fixed output electricity n processedoutFor: nout=(int) ((nin-nm)/N+1)+nm;If it is described defeated Enter electricity ninLess than described display electricity nm, then output electricity noutFor: nout=(int) ((nin-nm) /N-1)+nm;If described input electricity ninEqual to described display electricity nm, export electricity noutFor: nout=nin;Wherein nin noutAnd nmNumerical value before percentage sign during for showing with hundred-mark system, according to N The coefficient that current working current size adjusts in real time.
Method the most according to claim 3, it is characterised in that described simulation discharge and recharge processes concrete Including: when system detects that the current display electricity of battery did not changed within a period of time, if System is in charged state, then calculate duration t needed for analog charge in the charge statec, at tcDuration model In enclosing, the input electricity n that described simulation discharge and recharge is processedinThe speed adding 1 according to time per unit becomes It is turned to simulate the output electricity that discharge and recharge processes;If system is in discharge condition, then calculate in electric discharge The required duration t of state Imitating electric discharged, at tdIn the range of duration, by described input electricity ninAccording to often The output electricity that the speed change that unit interval subtracts 1 processes as simulation discharge and recharge, wherein said ninFor Numerical value before percentage sign when representing with hundred-mark system.
Method the most according to claim 3, it is characterised in that described electricity Filtering Processing is specifically wrapped Include: by electricity Filtering Processing input electricity value join filtering queue end, by queue the earliest A data deletion, then to filtering queue in all values average as electricity Filtering Processing Output electricity.
Method the most according to claim 3, it is characterised in that described preservation electricity processes and includes step Rapid: to detect that the current display electricity of battery changes, or distance last saved exceedes Preset Time, or during user's modification time, described display electricity and temporal information will be preserved to literary composition Part system, with the survey calculation of electricity during participation system boot next time.
Method the most according to claim 8, it is characterised in that described preservation electricity processes and also includes Step: when system boot next time, the last electricity letter preserved before first loading shutdown from file system Breath and temporal information, and measuring electric quantity when calculating start, the electricity being then loaded into described in contrast with The measuring electric quantity of described calculating, if the two electricity is more or less the same, and time change is not less than specifying Value, then it is assumed that the described information about power being loaded into from file system is effective, display initial after start Electricity will calculate according to the information about power of described loading, if electricity deviation is relatively big, the most directly makes With described calculated measuring electric quantity, ignore the information about power stored before.
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CN105759211A (en) * 2014-12-19 2016-07-13 宇龙计算机通信科技(深圳)有限公司 Battery residual electricity quantity value display method and system
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