CN1387279A - Charging and discharging energy display device and measuring method - Google Patents
Charging and discharging energy display device and measuring method Download PDFInfo
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- CN1387279A CN1387279A CN01115720A CN01115720A CN1387279A CN 1387279 A CN1387279 A CN 1387279A CN 01115720 A CN01115720 A CN 01115720A CN 01115720 A CN01115720 A CN 01115720A CN 1387279 A CN1387279 A CN 1387279A
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- 238000007599 discharging Methods 0.000 title claims description 31
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- 238000005070 sampling Methods 0.000 claims abstract description 46
- 230000004907 flux Effects 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 8
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- 238000009434 installation Methods 0.000 claims description 5
- 238000000205 computational method Methods 0.000 claims description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a charge-discharge energy display device and a measurement method, which samples in a fixed period to obtain the charge-discharge current and terminal voltage of a storage battery, then calculates the sampled energy W = (P0+ P1) T/2, calculates the charge-discharge energy value of one sampling, and the charge-discharge energy value of the storage battery is obtained by always accumulating or subtracting the sampled charge-discharge energy value, and displays the actual charge-discharge energy value of the storage battery in a digital way.
Description
The invention relates to a kind of charge-discharge energy indicator and method of measurement, display unit particularly of the present invention and method can accurately be calculated the electric energy value of storage battery, and can be by numeral to show.
In recent years, because advancing fast of science and technology, causing some high-tech product volumes is to do littler and littler, more and more frivolous, in order that make the people easy to carry, as notebook computer, mobile phone, CD, PDA, VCD ... Deng portable electronic apparatus, but its main power supply is the secondary cell that uses elasticity and mobility and secondary to discharge and recharge from the space with height, the storage battery that common people are referred to as; But interrupt suddenly for fear of the power supply supply usually, and cause the disappearance of data in the electronic installation maybe can't use, electronic installation all can detect the remaining electric flux of storage battery, and is shown.But most all express, so that allow the user can't know that what actual electrical energy storage battery on earth also have in the fuzzy mode of stage or percentage.
In addition, known technology also has a problem to relate to the charger of storage battery, charger now, the charger that does not have any label shows that with the numerical value of reality what charge volume storage battery finished, also demonstrates this storage battery without any the charger of label and also has what electric flux.According to known technology, the charging modes of charger approximately is divided into three kinds:
1, constant-voltage charge method: charger provides the voltage source of deciding of storage battery, promptly when charge in batteries to when deciding the identical voltage of voltage source, charging current stops naturally, charge in batteries is finished;
2, constant-current charge method: it is good that the method is decided voltage method, can provide storage battery stable charging current, but shortcoming is that the charging circuit cost is higher, must have a voltage detection circuit, when the terminal voltage of storage battery arrives specified magnitude of voltage, just can cut off charge power supply, stop charging;
3, pulse charging method: charge power supply is switched with characteristic frequency, to charge in batteries, can be made the chemical characteristic activation of storage battery, increase storage battery useful life with the pulse power.
Charger according to the known technology the whole bag of tricks is implemented all can judge whether to reach rated voltage with the last terminal voltage of storage battery, and with as the condition that stops to charge, in other words, charging procedure is bound to stop.So, known technology does not stipulate the starting voltage of charging why, so each in fact charging enters the electric flux of storage battery, might not, sometimes many few sometimes, even cell degradation, the user does not have institute yet and finds, the user often so not goes to do the action of battery discharge, usually do not know that perhaps battery has and do not have just charging once more of electricity, all all are because the known charge device does not provide the storage battery electric flux to show when charging, allow the user can not obtain the information that can judge according to this, thereby expert's advice is left a question open, so-called battery can wear out, battery has memory effect, concerning the user, can not be confirmed at short notice, because whole process is too slow.
Known to above-mentioned, the easier electric flux present situation of knowing storage battery when how to allow the user charge so that remaining electric flux is done optimal distribution and utilization, just becomes the problem that institute of the present invention desire solves.
Main purpose of the present invention is providing a kind of charge-discharge energy indicator and method that can accurately calculate the charging and discharging of accumulator energy value and show.
Secondary objective of the present invention can show the display packing of this storage battery dump energy at any time in a kind of electronic product that is applicable to any use storage battery is provided.
Another object of the present invention is providing a kind of charger that can show the electric flux that this charge in batteries is accumulated when storage battery charges at any time that has.
In the charge-discharge energy indicator and method of preferred embodiment of the present invention, with a fixing periodic sampling, obtain charging and discharging of accumulator electric current and terminal voltage, then, calculate sampling electric flux W=(P0+P1) T/2 again, calculate the sampling electric energy value that discharges and recharges once what are, and the electric energy value of accumulator cell charging and discharging to be the electric energy value that discharges and recharges that always will take a sample add up or tired subtracting up, obtain, the actual power value with this accumulator cell charging and discharging shows with for example digital form again.
Be that purpose of the present invention can realize by following mode, a kind of electric flux display unit, be electrically connected in the charging and discharging of accumulator loop, this electric flux display unit is by transducer, the circuit that controller and display are formed, it is characterized by: aforementioned controller is by aforementioned transducer can take a sample in a sampling period terminal voltage value that obtains storage battery and the current value of aforementioned charging and discharging circuit, to calculate the electrical power value, and the electric energy value that aforementioned controller accumulative total is calculated by electrical power average in the aforementioned sampling period, and the electric energy value of cusum is shown in the aforementioned display.
The electrical power value that is further characterized in that of the present invention is the product of the current value of the terminal voltage value of aforementioned storage battery and aforementioned charging and discharging circuit, and the electric energy value that calculates in the aforementioned sampling period is the product of aforementioned sampling period and aforementioned electric power average, be charging and judge storage battery when aforementioned controller, then before the controller electric energy value that each sampling period calculates that adds up.The electrical power value is the product of the current value of the terminal voltage value of aforementioned storage battery and aforementioned charging and discharging circuit, and the electric energy value that calculates in the aforementioned sampling period is the product of aforementioned sampling period and aforementioned electric power average, judge that storage battery is discharge and work as aforementioned controller, the tired electric energy value that subtracts each sampling period calculating of then aforementioned controller.Controller connects one and switches switch, and when aforementioned controller detected aforementioned diverter switch action, aforementioned controller can switch the displaying contents of aforementioned display.Controller connects the switch that makes zero, and when aforementioned controller detects aforementioned making zero during switch motion, the reset electric flux summation of accumulative total of aforementioned controller is a null value.The invention process is in a charger product or electronic installation or accumulator plant.
The present invention can be by following realization about the purpose of method of measurement, a kind of charge-discharge energy method of measurement, be used for calculating a storage battery and continue electric energy value in charging and discharging circuit, it is characterized in that these electric flux computational methods comprise: in a sampling period, take a sample the terminal voltage value of aforementioned storage battery and the current value of aforementioned charging and discharging circuit are to calculate the electrical power value; Calculate the electrical power average in the aforementioned sampling period; And accumulative total electric energy value, this electric energy value is the product of aforementioned sampling period and electrical power average.
Charge-discharge energy method of measurement of the present invention is further characterized in that the aforementioned electric performance number is the product of aforesaid voltage value and aforementioned electric flow valuve.
The charger product that cooperates preferred embodiment of the present invention to implement, the user can be according to the actual power value that shows, can clearly know and go out to fill how many electric fluxs at every turn, and for the slight change of each rechargeable energy and the variation of battery discharging, user's natural energy is grasped information, discharges and recharges in due course.As electric flux display unit of the present invention is provided on the electronic installation product, how much electric then each storage battery fills, and has used how many electricity, also all absolutely clear, has not taken place and do not have the situation of too early charging.
Description of drawings:
Fig. 1 is the characteristic curve diagram in charge in batteries power and charging interval;
Fig. 2 is the circuit block diagram in charge-discharge energy indicator of the present invention and accumulator cell charging and discharging loop;
Fig. 3 is the circuit block diagram of another embodiment of the present invention;
Fig. 4 is the flow chart that the present invention charges and discharge the electric weight display mode;
Fig. 5 is the circuit diagram that the present invention discharges and recharges quantity display apparatus.
Its plurality of advantages of charge-discharge energy indicator of the present invention and method and feature will and appendedly be further understood graphic from following detailed description.
At first see also shown in Figure 1ly, be the characteristic curve diagram in charge in batteries power and charging interval.In the charging process of charger to storage battery, as shown in Figure 1, long more actually when the charging interval, storage battery obtains the charging electrical power P can be fewer and feweri, and can't keep certain value, and cause the reason of this phenomenon, relevant with following points haply: the temperature regime of storage battery; The material of storage battery; Storage battery aging etc.
Yet, calculate among the formula W=PT of electric flux, its electrical power P is meant and is certain value within time T, so desire is calculated the account form that the rechargeable electrical energy of storage battery within a period of time T can not directly adopt this W=PT, because the charge power P of storage battery is not a definite value, can't accurately try to achieve electric flux W within time T.
In charge-discharge energy display packing of the present invention, the rechargeable electrical energy account form of storage battery is to take in the sample time T 0, calculates electrical power P 0 and P1 by sampling voltage that discharges and recharges and electric current, adds up one by one or the tired electric energy value that subtracts sampling.Please cooperate Fig. 1, calculating accumulator of the present invention discharge and recharge electric flux W, be with the electric flux of trapezoidal area convergence electrical power P in sampling period T0, i.e. W=(P0+P1) T0/2.
Suppose sampling period T0=0.01 second, and the charging current I=1mA of storage battery, and the charging voltage of storage battery is when t1 and t2, the terminal voltage of sampling storage battery is respectively V0=3V, V1=2.9V, then the rechargeable electrical energy W of sample time is that unit is calculated as follows with the microwatt hour:
W＝(P0+P1)T0/2；P＝VI
W＝[10-3(3+2.9)/2](0.01/3600)
The W=0.00081947 microwatt hour
Therefore, during charging and discharging of accumulator, calculate the mode of electric flux according to the present invention, rechargeable electrical energy that storage battery continues or discharge electric flux are sampling and calculate adding up of electric energy value or tired subtracting.
See also shown in Figure 2ly, show that charge-discharge energy indicator of the present invention is connected in the circuit block diagram in accumulator cell charging and discharging loop.According to known technology, charger power supply 10 can be decides voltage source or constant current source, and provides rechargeable electrical energy to storage battery 40.In an embodiment of the present invention, charge-discharge energy indicator mainly comprises transducer 20, controller 30 and display 50, wherein transducer 20 is an A/D converter, by series connection one resistor 70 in the accumulator cell charging and discharging loop, the A/D converter direct sample goes out storage battery both end voltage VAD0 and VAD1, and changing voltage value VAD0 and VAD1 be digital signal, offers this controller 30 via data bus 60.
The charge-discharge energy indicator that sees also Fig. 3 another embodiment of the present invention is connected in the circuit block diagram in accumulator cell charging and discharging loop.In this embodiment, charge-discharge energy indicator comprises transducer 20, controller 30 and display 50, wherein transducer 20 is an A/D converter, terminal voltage in order to conversion storage battery 40, and this transducer 20 also cooperates a current inductor 80 to be series in the charging and discharging of accumulator loop, and current inductor 80 discharges and recharges flow valuve to controller 30 via what data bus 90 provided storage battery 40.
In this embodiment of the present invention, the inductor product of the commercial use that the current inductor 80 of charge-discharge energy indicator can be produced by National Semiconductor company is implemented, and its product I C numbers LM3822 and LM3824.This inductor product measurement ± 1A electric current accuracy is up to 2%, and is with pulse width modulation (PWM) accurately the output current value and the sense of current, and connects microcontroller 30 easily.
In the Fig. 2 and the embodiment of the invention shown in Figure 3, controller 30 can connect one and switch switch 100 and a switch 110 that makes zero, controller 30 can detect the action of diverter switch 100, be presented at the content of display 50 with switching, for example, the user pushes diverter switch 100 continuously, and controller 30 switching display content in regular turn is magnitude of voltage, current value and electric energy value; In addition, controller 30 can detect the action of the switch 110 that makes zero, and the electric energy value that charges into that adds up to reset is zero.In an embodiment of the present invention, display 50 also can utilize a menu, provides the user directly to select required content, for example: accurately show electric energy value, magnitude of voltage and current value with digital form.
Then see also Fig. 4, show the flow chart of charge-discharge energy display mode of the present invention.In charge-discharge energy indicator of the present invention, the calculating determining program that controller 30 is carried out comprises:
Whether program 210: detecting the switch 110 that makes zero has action; If have, then arrive program 220, otherwise to program 230;
Program 220: the electric energy value of accumulative total is made zero;
Program 230: voltage, the current value of sampling charging and discharging circuit:
In the embodiment shown in Figure 2, by transducer 20 changing voltage VAD0 and VAD1, to obtain charger voltage and accumulator voltage value; In the embodiment shown in fig. 3, can obtain accumulator voltage value and charging and discharging currents value by current inductor 80 and transducer 20.
Program 240: discharge and recharge judgement:
In the embodiment shown in Figure 2, when VAD0＞VAD1, the expression charger charges to storage battery, then arrives program 250; When VAD0＜VAD1, the expression storage battery discharges, then to program 260;
And in the embodiment shown in fig. 3, can be that storage battery charges by defining current inductor 80 positive current directions, then arrive program 250; Otherwise it is that storage battery discharges that current inductor 80 records the negative current direction, then to program 260.
Program 250: control display 50 shows the information that accumulator positive is charging, and the down-stream 270 of the electric energy value of the sampling that adds up, among the embodiment wherein shown in Figure 2, it is VAD1/R and storage battery end piezoelectric voltage VAD0-VAD1 that each sampling will obtain charging current, account form according to W=(P0+P1) T0/2, can calculate sampling electric energy value, and be added up, its summation is storage battery and continues the electric energy value that charging is accumulated.
In addition, among the embodiment shown in Figure 2, each sampling positive current direction is charging current and accumulator voltage, account form according to W=(P0+P1) T0/2, obtain electrical power P 1 value of this sub-sampling, cooperate electrical power P 0 value of previous sample again, and obtain sampling electric energy value, added up, its summation is storage battery and continues the electric energy value that charging is accumulated.
Program 260: control display 50 shows the information of accumulator positive in discharge, and the tired down-stream 270 that subtracts the electric energy value of sampling, among the embodiment wherein shown in Figure 2, it is VAD1/R and accumulator voltage VAD1-VAD0 that each sampling can obtain discharging current, account form according to W=(P0+P1) T0/2, obtain this sub-sampling electric flux value, tired out and subtract, its summation is the electric energy value that the storage battery continuous discharge is consumed.
Program 270: after postponing a sampling period T0, get back to program 210.
The charge-discharge energy indicator that Fig. 2 and Fig. 3 implemented according to the present invention, after the user pushes the switch 110 that makes zero, the charge-discharge energy value of controller 30 meeting replacement accumulative totals is zero, re-execute the aforementioned calculation determining program, therefore, controller 30 is shown by display 50, the electric flux summation adds up, be this storage battery and continue the electric energy value summation that charging is accumulated, subtract electric energy value summation, be the electric energy value summation that this storage battery continuous discharge consumes and display 50 demonstrations are tired.So, the user just can know accurate grasp charging and discharging of accumulator state.
As shown in Figure 5, be the circuit diagram of charge-discharge energy indicator preferred embodiment of the present invention.Wherein, controller 30 is implemented by numbering U1 EM78447 integrated circuit, it is a general program controller, can be electrically connected the potential change that receives a plurality of push-button switch SW1 and SW2 simultaneously, push-button switch SW1 and SW2 implement diverter switch 100 respectively and the switch 110 that makes zero, calculating determining program shown in Figure 4 is carried out in numbering U1 EM78447 integrated circuit and sequencing, and is obtained the terminal voltage of storage battery 40 by the A/D converter 20 that numbering U2 integrated circuit is implemented.In addition, numbering IR1 is a LCD device, implements display 50; Numbering M1 is a charger power supply 10.
This embodiment according to the present invention, the voltage at A/D converter 20 direct sample storage batterys 40 two ends, so controller 30 in program 250 and program 260, the terminal voltage of calculating accumulator 40 is respectively VAD0-VAD1 or VAD1-VAD0, and electric current is VAD1/R1; According to the account form of W=(P0+P1) T0/2, obtain this sub-sampling electric flux value again, added up and result of calculation is shown in the LCD display 50.
After describing preferred embodiment of the present invention in detail, being familiar with this technology personage can clearly understand, and can carry out various variations and change not breaking away under following claim and the spirit, and the present invention is not subject to the execution mode of the embodiment of specification, for example, charge-discharge energy indicator of the present invention and method can be carried out up on the commercially available charger or general electronic products, as discman, mobile phone, PDA etc., or be implemented on the storage battery product originally on one's body, make it have the function of the electric flux of demonstration own.
Claims (10)
1, a kind of electric flux display unit is electrically connected in the charging and discharging of accumulator loop, and the circuit that this electric flux display unit is made up of transducer, controller and display is characterized by:
Aforementioned controller is by aforementioned transducer can take a sample in a sampling period terminal voltage value that obtains storage battery and the current value of aforementioned charging and discharging circuit, to calculate the electrical power value, and the electric energy value that aforementioned controller accumulative total is calculated by electrical power average in the aforementioned sampling period, and the electric energy value of cusum is shown in the aforementioned display.
2, electric flux display unit as claimed in claim 1, it is characterized in that: the electrical power value is the product of the current value of the terminal voltage value of aforementioned storage battery and aforementioned charging and discharging circuit, and the electric energy value that calculates in the aforementioned sampling period is the product of aforementioned sampling period and aforementioned electric power average, be charging and judge storage battery when aforementioned controller, then before the controller electric energy value that each sampling period calculates that adds up.
3, electric flux display unit as claimed in claim 1, it is characterized in that: the electrical power value is the product of the current value of the terminal voltage value of aforementioned storage battery and aforementioned charging and discharging circuit, and the electric energy value that calculates in the aforementioned sampling period is the product of aforementioned sampling period and aforementioned electric power average, judge that storage battery is discharge and work as aforementioned controller, the tired electric energy value that subtracts each sampling period calculating of then aforementioned controller.
4, electric flux display unit as claimed in claim 1 is characterized in that: controller connects one and switches switch, and when aforementioned controller detected aforementioned diverter switch action, aforementioned controller can switch the displaying contents of aforementioned display.
5, electric flux display unit as claimed in claim 1 is characterized in that: controller connects the switch that makes zero, and when aforementioned controller detects aforementioned making zero during switch motion, the reset electric flux summation of accumulative total of aforementioned controller is a null value.
6, electric flux display unit as claimed in claim 1 is characterized in that: be implemented in the charger product.
7, electric flux display unit as claimed in claim 1 is characterized in that: be implemented in the electronic installation.
8, electric flux display unit as claimed in claim 1 is characterized in that: be implemented in the accumulator plant.
9, a kind of charge-discharge energy method of measurement is used for calculating a storage battery and continues electric energy value in charging and discharging circuit, it is characterized in that these electric flux computational methods comprise:
In a sampling period, the terminal voltage value of the aforementioned storage battery of taking a sample and the current value of aforementioned charging and discharging circuit are to calculate the electrical power value;
Calculate the electrical power average in the aforementioned sampling period; And
Accumulative total electric energy value, this electric energy value is the product of aforementioned sampling period and electrical power average.
10, charge-discharge energy method of measurement as claimed in claim 9 is characterized in that the aforementioned electric performance number is the product of aforesaid voltage value and aforementioned electric flow valuve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01115720A CN1387279A (en) | 2001-05-21 | 2001-05-21 | Charging and discharging energy display device and measuring method |
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| CN01115720A CN1387279A (en) | 2001-05-21 | 2001-05-21 | Charging and discharging energy display device and measuring method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883097B (en) * | 2003-11-20 | 2011-11-16 | 株式会社Lg化学 | The method of estimating the maximum discharge power of storage battery |
| CN104364669A (en) * | 2012-06-13 | 2015-02-18 | 株式会社Lg化学 | Apparatus and method for estimating the state of charge of a secondary battery comprising a mixed positive electrode material |
| CN110174551A (en) * | 2019-05-29 | 2019-08-27 | 上海新型烟草制品研究院有限公司 | Power consumption quantity measuring method, system, equipment, storage medium and aerosol generating device |
-
2001
- 2001-05-21 CN CN01115720A patent/CN1387279A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883097B (en) * | 2003-11-20 | 2011-11-16 | 株式会社Lg化学 | The method of estimating the maximum discharge power of storage battery |
| CN104364669A (en) * | 2012-06-13 | 2015-02-18 | 株式会社Lg化学 | Apparatus and method for estimating the state of charge of a secondary battery comprising a mixed positive electrode material |
| CN104364669B (en) * | 2012-06-13 | 2017-02-22 | 株式会社Lg 化学 | Apparatus and method for estimating state of charge state of charge of secondary cell including mixed cathode material |
| CN110174551A (en) * | 2019-05-29 | 2019-08-27 | 上海新型烟草制品研究院有限公司 | Power consumption quantity measuring method, system, equipment, storage medium and aerosol generating device |
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