CN105449299B - A kind of long-range charging/discharging thereof of battery based on float charge voltage - Google Patents
A kind of long-range charging/discharging thereof of battery based on float charge voltage Download PDFInfo
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- CN105449299B CN105449299B CN201510793600.2A CN201510793600A CN105449299B CN 105449299 B CN105449299 B CN 105449299B CN 201510793600 A CN201510793600 A CN 201510793600A CN 105449299 B CN105449299 B CN 105449299B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/448—End of discharge regulating measures
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of long-range charging/discharging thereof of the battery based on float charge voltage, the float charge voltage setting value by remotely turning down setting carries out the online electric discharge of battery and charged online with the float charge voltage setting value progress battery for remotely recalling to former setting；This method also provides the calculating of accumulator capacity.The present invention realizes deep discharge, automatic monitoring, batch operation, fixed cycle operator.
Description
Technical field
The present invention relates to mobile base station battery field, more particularly to a kind of long-range charge and discharge of battery based on float charge voltage
Method for electrically.
Background technology
In power network communication accident over the years, cause communication equipment to have a power failure due to communication battery failures or exchange power failure,
The ratio that the accident of communication disruption accounts for is quite big, " supply station " of the communication power supply as communication system, its reliability of operation and peace
Full property has increasingly becomed the operating key factor of communication.Therefore, the power supply of each communication site and battery should be regular
Maked an inspection tour and checked, guarantee accomplishes that battery carries out capacity test or checking discharging test, and power supply and battery every year
Alarm must be connected to someone place on duty, communication power supply and battery reliability of operation and security are ensured with this,
And then improve whole communication equipment reliability of operation and security.
The batteries for the mobile base station being made up of battery are the back-up sources of base station, when mains failure, utilize storage
Battery pack power supply to the device, to keep the unimpeded of communication.Generally, base station uses Switching Power Supply power supply to the device, while also to storage
Battery pack charges；Switch to floating charge after being full of to batteries charging；Floating charge is to compensate battery self discharge
Loss, make battery remain full of electricity state, with ensure have a power failure when battery can power at full capacity；Battery is long-term
Operate in floating charge state.Generally, the single battery in batteries is referred to as " cell " in the industry.
The electric discharge and charging of battery are realized, there are 2 kinds of ways at present, manually battery is safeguarded first, using.People
Work safeguard mode be, attendant per season inspection once, to behindhand battery using off-line maintenance, i.e., after battery is powered off from
Take off maintenance in batteries, voltage is high just to discharge, and under-voltage just supplement electricity.Overcharge or the battery of charge less is overcharging for a long time
Or worked under charge less state, safeguard it is once far from being enough by per season.As mobile base station is on the increase, safeguard that strength is obvious
Deficiency.Moreover manual maintenance labor intensity is big, artificial transport cost is high, this hysteresis, extensive manual maintenance, basic to meet
The real-time online required for battery is not finely safeguarded.
Second, by the Switching Power Supply monitoring system having built up, by the float charge voltage for remotely turning down Switching Power Supply one by one
Passage is discharged, and is charged again by callback command after the completion of electric discharge.Such as《The long-range electric discharge of battery and monitoring》（《Electricity
Force system communicates》The phase page 75 of volume 27 the 163rd）Disclose by setting the final voltage of battery discharging to realize battery certainly
It is dynamic to terminate electric discharge, switch to fill state, do not refer to charging operations.This method be only capable of it is single remotely discharged, discharge process
Moment concern is obtained, completes to recharge in time to discharge.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of deep discharge, automatic monitoring, batch to grasp
Make, the long-range charging/discharging thereof of the battery based on float charge voltage of fixed cycle operator, this method also provides the calculating of accumulator capacity.
The above-mentioned purpose of the present invention is achieved by following technical solution：
A kind of long-range charging/discharging thereof of battery based on float charge voltage, comprises the following steps：
S1, the long-range float charge voltage setting value for turning down setting carry out battery and discharged online；
Whether S2, judging to discharge according to blocks current size succeeds；
Whether S3, judging to discharge according to battery voltage or battery current size finishes；
S4, the long-range float charge voltage setting value for recalling to former setting carry out battery and charged online；
Whether S5, judging to charge according to blocks current size succeeds；
Whether S6, judging to charge according to battery current size finishes.
The principle of accumulator cell charging and discharging is to include such as the next stage：
（1）Original state, the float charge voltage of Switching Power Supply is equal with battery voltage, equal under battery floating charge state
Voltage, now voltage difference is zero between Switching Power Supply and battery, and electric current is about 0, referred to as high pressure floating charge state；
（2）Switching Power Supply float charge voltage is turned down, now Switching Power Supply control disconnects rectification module, and battery is connected with load,
Battery carries out discharge operation.Battery tension gradually reduces by reduction, discharge current, referred to as discharge process；
（3）It is finally equal with the float charge voltage of Switching Power Supply with the reduction of battery tension during electric discharge, this
When electric current tend to 0, referred to as charge less state；
（4）When heightening Switching Power Supply float charge voltage, Switching Power Supply while power supply to the device except charging a battery.Store
Cell voltage is stepped up, and electric current is gradually reduced, and the process is referred to as charging process；
（5）It is finally equal with the float charge voltage of Switching Power Supply with the rise of battery tension during charging, this
When electric current tend to 0, referred to as floating charge state.
Specifically, the float charge voltage setting value after being turned down in the step S1 is 48V.
The specific determination methods of step S2 for check battery pack blocks current whether<- 3A, and continue more than 1 minute, it is then
It is judged as discharging successfully.
The specific determination methods of step S3 are to be judged by voltage or electric current, if battery voltage is equal to floating charging
Pressure or battery current>- 0.1A simultaneously continues one minute, then judges that electric discharge terminates.
The specific determination methods of step S5 for check battery pack blocks current whether>3A, and continue more than 1 minute,
It is then to judge to charge successfully.
The specific determination methods of step S6 are to lead to over-current judging, battery current>0.1A simultaneously continues one minute, then sentences
Disconnected charging terminates, and battery reaches floating charge state.
Further, also comprise the following steps before step S1：
Can S01, judgement carry out discharge operation：The Switching Power Supply various parameters at electric discharge office station are gathered, determine whether city
Electricity power failure alarm, undervoltage alarm, communication disruption alarm, have then without discharge operation；
S02, arrange parameter value：If judging to carry out discharge operation, carry out direct current undervoltage alarm value and set.
One or more offices that operate electric discharge of Remote Selection stand before step S01.
The present invention is additionally provided with background server and records the related temperature of battery, battery tension in real time, average current, puts
Electric time, charging interval, electricity, charge capacity are released, for counting accumulator property, including long-range electric discharge recording and base station are stopped
The natural electric discharge recording of electricity.
Background service monitors battery tension current value in real time, is just recorded as long as meeting discharge and recharge event.With reference to correlation
Form is recorded, the key messages such as accumulator cell charging and discharging voltage curve, electric discharge average current, average electricity can be obtained.
The calculating of accumulator capacity, capacity and the possible hidden danger for predicting battery are also most important.Because batteries
In certain single battery capacity it is less than normal（Behindhand battery）, electric discharge is terminated in advance during electric discharge, causes whole group discharge time of accumulator to shift to an earlier date
Terminate.Or there is a cell damage in batteries（Fail battery）, then whole group battery can not work, cause communicating interrupt
Accident.
The voltage of dynamic calculation battery, current conditions in whole discharge process, carry out capacity according to equation below and estimate
Calculate：
（1）Release battery capacity=electric discharge duration * electric discharge average currents；
The average current of the battery 2 of 1 average current of battery+in discharge time to discharge in average current=discharge time
+ ... battery n average current in+discharge time；
The electric current all values ÷ storage numbers of battery 1/2/ .../n average current=battery 1/2/ .../n storages；
The all values sum of battery current in the discharge time that the electric current all values of storage record in real time for background server；
（2）Storage battery practical capacity is estimated：The actual estimated capacity of battery=releasing battery capacity/S, wherein S is variable,
S is setting value or default value.
Compared with prior art, beneficial effects of the present invention are as follows：
（1）Prior art typically by single downward float charge voltage, can not carry out deep discharge, book hair in most cases
It is bright that by lowering correlation, passage is set, the electric discharge of more depth can be carried out and avoid producing battery low pressure warning；
（2）Save human cost：Communication base station quantity is more, and a single operator of districts and cities has more than 2000 substantially, hair
Cloth region is wide, is largely distributed in suburbs and outlying mountain area, if artificial carry out charge and discharge maintenance to base station, averagely for each person every day
It is only capable of the base station in 2 or so, room.Technology was required with 1 year charge and discharge maintenance at least twice, human cost (2000*200*2)/2=
400000,10000 stations of the whole province calculate, and cost is at least annual 2000000 human cost.Using the long-range charging method, daily
1000 base stations of single batch energy are discharged together, can unattended charge and discharge for the normal base station of most monitored conditions
Electricity, only a small number of equipment that abnormal or switch power module is not supported that communicate just need manual intervention, greatly save manpower into
This；
（3）Record is precisely reliable to be safeguarded to accumulator cell charging and discharging：Traditional manpower regular visit discharge and recharge, is typically just pressed
Season or half a year inspection once carry out discharge and recharge, safeguard that dynamics is inadequate.The long-term civil power of portion of base stations is for normal only in inspection
When just carry out a discharge and recharge, portion of base stations in itself in the case of commercial power interruption repeatedly carry out depth discharge and recharge, without weigh
Charge and discharge maintenance is carried out again.Battery can be recorded using this method whether to have discharged naturally under normal circumstances, with reference to remote
Journey electric discharge recording, more scientific accumulator cell charging and discharging can be obtained and safeguard record；
（4）By monitoring in real time, the duration of discharge and recharge is recorded, finds the quality of the quality of battery in time, if
The state to be changed is reached.
Brief description of the drawings
Fig. 1 is the principle schematic of the present invention；
Fig. 2 is the schematic flow sheet of the present invention；
Fig. 3 is the discharge time voltage curve that embodiment 1 is tested.
Embodiment
The present invention is made with reference to specific embodiment and further being elaborated, but embodiment is not done to the present invention
Any type of restriction.
Embodiment 1
Such as Fig. 2, a kind of long-range charging/discharging thereof of battery based on float charge voltage, comprise the following steps：
Step 1：Stood by the office for selecting to be discharged（Can batch）, carry out discharge operation；
Step 2：Can judgement carry out discharge operation：The Switching Power Supply various parameters at electric discharge office station are gathered, are determined whether
Mains failure alerts, undervoltage alarm, communication disruption alarm.Have then without discharge operation；
Step 3:Arrange parameter value is discharged：Carry out direct current undervoltage alarm value to set, set the value to be to discharge
During do not produce undervoltage alarm, turn down float voltage setting value；The step is simultaneously not drawn into；
Step 4：Whether detection electric discharge succeeds：By after setting command check battery pack blocks current whether<- 3A, and
Continue more than 1 minute, be that then explanation is discharged successfully；
Step 5：Judge whether discharge off：Judged by voltage or electric current, if battery voltage is equal to floating charging
Pressure or battery current>- 0.1A simultaneously continues one minute, then illustrates that electric discharge terminates；
Step 6：Return setting parameter：DC voltage and floating charging are pushed back the value for setting back original hair floating charge state；The step is simultaneously
It is not drawn into；
Step 7：Whether detection charging succeeds：By after setting command check battery pack blocks current whether>3A, and hold
It is continuous more than 1 minute, it is that then explanation charges successfully；
Step 8：Judge whether charging complete：Judged by person's electric current, battery current>0.1A simultaneously continues one minute, then
Illustrate that charging terminates, battery reaches floating charge state.
The step of the above 8 completes a discharge and recharge flow.Wherein, former float voltage setting value is 53.5V, floating charging after downward
Press arranges value 48V, battery voltage 53.5V.
Such as Fig. 1, the principle of accumulator cell charging and discharging is to include such as the next stage：
（6）Original state, the float charge voltage of Switching Power Supply is equal with battery voltage, equal under battery floating charge state
Voltage, now voltage difference is zero between Switching Power Supply and battery, and electric current is about 0, referred to as high pressure floating charge state；
（7）Switching Power Supply float charge voltage is turned down, now Switching Power Supply control disconnects rectification module, and battery is connected with load,
Battery carries out discharge operation.Battery tension gradually reduces by reduction, discharge current, referred to as discharge process；
（8）It is finally equal with the float charge voltage of Switching Power Supply with the reduction of battery tension during electric discharge, this
When electric current tend to 0, referred to as charge less state；
（9）When heightening Switching Power Supply float charge voltage, Switching Power Supply while power supply to the device except charging a battery.Store
Cell voltage is stepped up, and electric current is gradually reduced, and the process is referred to as charging process；
（10）It is finally equal with the float charge voltage of Switching Power Supply with the rise of battery tension during charging,
Now electric current tends to 0, referred to as floating charge state.
The present embodiment be additionally provided with background server record in real time the related temperature of battery, battery tension, average current,
Discharge time, charging interval, electricity, charge capacity are released, for counting accumulator property, including long-range electric discharge recording and base station
The natural electric discharge recording of power failure.
Background service monitors battery tension current value in real time, is just recorded as long as meeting discharge and recharge event.With reference to correlation
Form is recorded, the key messages such as accumulator cell charging and discharging voltage curve, electric discharge average current, average electricity can be obtained.
The calculating of accumulator capacity, capacity and the possible hidden danger for predicting battery are also most important.Because batteries
In certain single battery capacity it is less than normal（Behindhand battery）, electric discharge is terminated in advance during electric discharge, causes whole group discharge time of accumulator to shift to an earlier date
Terminate.Or there is a cell damage in batteries（Fail battery）, then whole group battery can not work, cause communicating interrupt
Accident.
The voltage of dynamic calculation battery, current conditions in whole discharge process, carry out capacity according to equation below and estimate
Calculate：
（1）Release battery capacity=electric discharge duration * electric discharge average currents；
The average current of the battery 2 of 1 average current of battery+in discharge time to discharge in average current=discharge time
+ ... battery n average current in+discharge time；
The electric current all values ÷ storage numbers of battery 1/2/ .../n average current=battery 1/2/ .../n storages；
The all values sum of battery current in the discharge time that the electric current all values of storage record in real time for background server；
（2）Storage battery practical capacity is estimated：The actual estimated capacity of battery=releasing battery capacity/S, wherein S is variable,
S is setting value or default value.
Default value such as following table：
| Final discharging voltage（V） | S |
| 49 | 0.3 |
| 48.5 | 0.43 |
| 48 | 0.54 |
| 47.5 | 0.63 |
| 47 | 0.71 |
| 46.5 | 0.78 |
| 46 | 0.84 |
| 45.5 | 0.89 |
| 45 | 0.93 |
| 44.5 | 0.96 |
| 44 | 0.98 |
| 43.2 | 1 |
It is as follows that the present embodiment measures one group of experimental data：
Measurement object, certain brand battery, original state battery tension 53.5V, the record per minute in discharge process
Primary voltage and current value.The voltage and current value are to be obtained by the switch power supply equipment timing acquiring connect on the battery pack
Numerical value.
| Time T（Minute） | Current value I（A） | Magnitude of voltage U（V） |
| 09:43 | 20.6 | 54 |
| 09:45 | 20.3 | 53.24 |
| 09:46 | 19.9 | 52.15 |
| 09:48 | 19.1 | 52.14 |
| 09:49 | 18.7 | 51.15 |
| 09:51 | 18.3 | 51.15 |
Discharge time voltage curve such as Fig. 3 of test, can be obtained from Fig. 3：
Discharge time=09:51:00-09:43:00=8/60 (hour)
Electric discharge average current=（20.6+20.3+19.9+19.1+18.7+18.3）/ 6=20.10 (peaces)
Release battery capacity=electric discharge duration * electric discharge average currents
=8/60 *20.10
=2.68 (ampere-hours)
The actual estimated capacity of battery=releasing battery capacity/S, wherein S is variable, and the S of the battery of the brand is in 51V
When set-point be 0.135 to be obtained according to formula
The actual estimated capacity of battery=releasing battery capacity/S
=2.68/0.135
=19.852（Ampere-hour）
The current unit of above-mentioned calculation formula is A, and voltage unit V, chronomere is hour, and battery level unit is AH
(ampere-hour).
Wherein, set-point is the estimated value of dump energy after electric discharge, and the estimated value is the empirical value after test of many times.
Claims (10)
1. the long-range charging/discharging thereof of a kind of battery based on float charge voltage, it is characterised in that comprise the following steps：
S1, the long-range float charge voltage setting value for turning down setting carry out battery and discharged online；
Whether S2, judging to discharge according to blocks current size succeeds；
Whether S3, judging to discharge according to battery voltage or battery current size finishes；
S4, the long-range float charge voltage setting value for recalling to former setting carry out battery and charged online；
Whether S5, judging to charge according to blocks current size succeeds；
Whether S6, judging to charge according to battery current size finishes.
2. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that the step
Float charge voltage setting value after being turned down in S1 is 48V.
3. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that step S2 has
Body determination methods for check battery pack blocks current whether<- 3A, and continue more than 1 minute, it is to be judged as discharging successfully.
4. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that the step
The specific determination methods of S3 are to be judged by voltage or electric current, if battery voltage is equal to float charge voltage or battery current
>- 0.1A simultaneously continues one minute, then judges that electric discharge terminates.
5. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that the step
The specific determination methods of S5 for check battery pack blocks current whether>3A, and continue more than 1 minute, it is then to judge to charge successfully.
6. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that the step
The specific determination methods of S6 are to lead to over-current judging, battery current>0.1A simultaneously continues one minute, then judges that charging terminates, battery
Reach floating charge state.
7. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that in step S1
It is preceding also to comprise the following steps：
Can S01, judgement carry out discharge operation：The Switching Power Supply various parameters at electric discharge office station are gathered, determine whether that civil power stops
Electric alarm, undervoltage alarm, communication disruption alarm, have then without discharge operation；
S02, arrange parameter value：If judging to carry out discharge operation, carry out direct current undervoltage alarm value and set.
8. the long-range charging/discharging thereof of battery according to claim 7 based on float charge voltage, it is characterised in that in step
One or more offices that operate electric discharge of Remote Selection stand before S01.
9. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that after being additionally provided with
Platform server records the related temperature of battery, battery tension, average current, discharge time, charging interval, releasing electricity in real time
Amount, charge capacity, for counting accumulator property.
10. the long-range charging/discharging thereof of battery according to claim 1 based on float charge voltage, it is characterised in that whole
The voltage of dynamic calculation battery, current conditions in discharge process, volume calculation is carried out according to equation below：
（1）Release battery capacity=electric discharge duration * electric discharge average currents；
The average current of the battery 2 of 1 average current of battery+in discharge time to discharge in average current=discharge time+...
Battery n average current in+discharge time；
The electric current all values ÷ storage numbers of battery 1/2/ .../n average current=battery 1/2/ .../n storages；Storage
Discharge time for recording in real time for background server of electric current all values in battery current all values sum；
（2）Storage battery practical capacity is estimated：The actual estimated capacity of battery=releasing battery capacity/S, wherein S is variable, and S is
Setting value or default value.
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| CN105449299B true CN105449299B (en) | 2017-12-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556882A (en) * | 2018-06-04 | 2019-12-10 | 财团法人工业技术研究院 | Adjustable power supply system and operation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196193A (en) * | 2017-12-22 | 2018-06-22 | 厦门拓宝科技有限公司 | A kind of method for safeguarding power matching network system worked well |
| CN108596349A (en) * | 2018-04-28 | 2018-09-28 | 广东日月潭电源科技有限公司 | A kind of ups power method for maintaining, system and device based on AR technologies |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199674A (en) * | 1992-01-18 | 1993-08-06 | Japan Storage Battery Co Ltd | Method for charging battery |
| CN101436823A (en) * | 2008-12-19 | 2009-05-20 | 中兴通讯股份有限公司 | Control method and control equipment capable of improving communication power supply AC electric network adaptability |
| CN202405387U (en) * | 2011-12-01 | 2012-08-29 | 吴瑞荣 | Remote comprehensive management system for storage battery of mobile base station |
-
2015
- 2015-11-17 CN CN201510793600.2A patent/CN105449299B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199674A (en) * | 1992-01-18 | 1993-08-06 | Japan Storage Battery Co Ltd | Method for charging battery |
| CN101436823A (en) * | 2008-12-19 | 2009-05-20 | 中兴通讯股份有限公司 | Control method and control equipment capable of improving communication power supply AC electric network adaptability |
| CN202405387U (en) * | 2011-12-01 | 2012-08-29 | 吴瑞荣 | Remote comprehensive management system for storage battery of mobile base station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556882A (en) * | 2018-06-04 | 2019-12-10 | 财团法人工业技术研究院 | Adjustable power supply system and operation method thereof |
| CN110556882B (en) * | 2018-06-04 | 2021-08-24 | 财团法人工业技术研究院 | Adjustable power supply system and operation method thereof |
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| CN105449299A (en) | 2016-03-30 |
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