CN103616642B - Capacity of lithium ion battery sorter - Google Patents
Capacity of lithium ion battery sorter Download PDFInfo
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- CN103616642B CN103616642B CN201310567552.6A CN201310567552A CN103616642B CN 103616642 B CN103616642 B CN 103616642B CN 201310567552 A CN201310567552 A CN 201310567552A CN 103616642 B CN103616642 B CN 103616642B
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Abstract
The present invention has about a kind of capacity of lithium ion battery sorter, comprises at least one capacity of lithium ion battery separation unit; This capacity of lithium ion battery separation unit comprises lithium ion battery B, heating resistance wire Rt, current-limiting resistance R, gathers resistance R _ f and Rad, current transformer T; Wherein, above-mentioned lithium ion battery B, heating resistance wire Rt, current-limiting resistance R and current transformer T is serially connected and forms loop, and this collection resistance R ad and this current transformer T are connected in parallel, and this collection resistance R _ f and lithium ion battery B are connected in parallel simultaneously. By the present invention, can filter out multiple lithium ion batteries that capacity approaches, and lithium ion battery approaching this capacity is connected and/or in parallel use, the Capacity uniformity of single lithium ion battery that can ensure lithium ion battery group is better, thereby the service efficiency that improves lithium ion battery group, increases the service life.
Description
Technical field
The present invention relates to performance of lithium ion battery parameter detecting technical field, particularly relate to a kind of capacity of lithium ion batterySorter.
Background technology
In new forms of energy product application, lithium ion battery connected and/or and be unified into lithium ion battery group and use, ifThe Capacity uniformity of the lithium ion battery of composition lithium ion battery group is bad, so lithium ion battery group is being discharged and rechargedCheng Zhong, can strengthen the difference between capacity of lithium ion battery, is easy to like this cause that part lithium ion battery overcharges or overdischarge,And the performance of another part lithium ion battery is not in full use, finally cause lithium ion battery group performance degradation, and veryFast decay or inefficacy.
Therefore, in order better to utilize lithium ion battery, just must screen himself capacity, capacity is approachedMultiple lithium ion batteries are connected and/or in parallel use, can increase substantially like this service life of lithium ion battery groupAnd service efficiency.
Summary of the invention
The object of the invention is is providing a kind of capacity of lithium ion battery sorter, can filter out multiple that capacity approachesLithium ion battery, and lithium ion battery approaching this capacity is connected and/or in parallel use, lithium ion battery can be ensuredThe Capacity uniformity of the single lithium ion battery of group is better, thereby improves the service efficiency of lithium ion battery group, extends and uses the longevityLife.
The object of the invention is to adopt following technical scheme to realize. The present invention proposes a kind of capacity of lithium ion batterySorter, comprises at least one capacity of lithium ion battery separation unit; This capacity of lithium ion battery separation unit comprises lithium ionBattery B, heating resistance wire Rt, current-limiting resistance R, collection resistance R _ f and Rad, current transformer T; Wherein, above-mentioned lithium-ion electricPond B, heating resistance wire Rt, current-limiting resistance R and current transformer T are serially connected and form loop, this collection resistance R ad and this electricityCurrent transformer T is connected in parallel, and this collection resistance R _ f and lithium ion battery B are connected in parallel simultaneously; This collection resistance R _ f and adoptingThe two ends of current collection resistance Rad are connected with single-chip microcomputer.
Object of the present invention can also be further achieved by the following technical measures.
Aforesaid capacity of lithium ion battery sorter, wherein this heating resistance wire Rt selects nichrome heating resistance wire.
Aforesaid capacity of lithium ion battery sorter, wherein this current-limiting resistance R selects metal film wire resistor.
Aforesaid capacity of lithium ion battery sorter, wherein this collection resistance R _ f and Rad select paster film resistor.
Aforesaid capacity of lithium ion battery sorter, wherein this current transformer T selects input and output to compare for 1000:1'sHall element.
By technique scheme, lithium ion battery internal resistance sorter of the present invention at least has following advantages and has beneficial effectReally: by the present invention, can filter out multiple lithium ion batteries that capacity approaches, and lithium ion battery approaching this capacity is enteredRow series connection and/or in parallel use, can ensure that the Capacity uniformity of single lithium ion battery of lithium ion battery group is better, therebyThe service efficiency that improves lithium ion battery group, increases the service life.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention,And can be implemented according to the content of description, and for allow above and other object of the present invention, feature and advantage canBecome apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Brief description of the drawings
Fig. 1: be the structural representation of capacity of lithium ion battery separation unit of the present invention.
Fig. 2: be the structural representation of capacity of lithium ion battery sorter of the present invention.
Fig. 3: be the workflow diagram of capacity of lithium ion battery sorter of the present invention.
Detailed description of the invention
Technological means and effect of taking for reaching predetermined goal of the invention for further setting forth the present invention, below in conjunction withAccompanying drawing and preferred embodiment, to a kind of its detailed description of the invention of capacity of lithium ion battery sorter, the knot that propose according to the present inventionStructure, feature and effect thereof, be described in detail as follows.
Consulting shown in Fig. 1, is the structural representation of capacity of lithium ion battery separation unit of the present invention. This lithium ion batteryCapacity separation unit comprises lithium ion battery B, heating resistance wire Rt, current-limiting resistance R, collection resistance R _ f and Rad, current transformerT; Wherein, above-mentioned lithium ion battery B, heating resistance wire Rt, current-limiting resistance R and current transformer T are serially connected and form backRoad, this collection resistance R ad and this current transformer T are connected in parallel, and this collection resistance R _ f and lithium ion battery B are connected in parallel on simultaneouslyTogether.
In the present invention, this capacity of lithium ion battery separation unit and single-chip microcomputer 1 are used in conjunction with, and this single-chip microcomputer 1 has to be adoptedCollection module, computing module, timing module and display module, this acquisition module is connected with computing module and timing module, this computingModule is connected with display module; Wherein, this acquisition module has at least two AD acquisition port; In this capacity of lithium ion battery sortingIn unit, an AD acquisition port of this acquisition module is connected with the two ends that gather resistance R ad, for gathering resistance R adVoltage U, simultaneously another AD acquisition port is connected with the two ends that gather resistance R _ f, the electric current for acquisition stream through collection resistance R _ fI; This computing module calculates above-mentioned voltage U and electric current I, and shows result by display module; This timing module is usedThe discharge time of calculating this lithium ion battery, in the time that acquisition module quits work, this timing module stops timing.
In the present invention, this heating resistance wire Rt selects nichrome heating resistance wire, and its advantage is that resistance is little, powerGreatly, oxidation resistance is strong, the life-span is long etc.; This current-limiting resistance R selects high-precision metal film wire resistor, its advantage be power large,Precision is high, vary with temperature that resistance varying-ratio is little, the life-span is long etc.; This collection resistance R _ f and Rad select paster film resistor, and it is excellentPoint is for volume is little, precision is high, vary with temperature that resistance varying-ratio is little, the life-span is long etc.; This current transformer T selects input and output ratioFor the accurate Hall element of 1000:1, its advantage is that volume is little, precision is high, Linearity is good, it is simple etc. to apply. This Current Mutual InductanceThe effect of device T is to dwindle current value, is mainly because the detection electric current of single-chip microcomputer is less, can make like this testing result accurate,Protect single-chip microcomputer simultaneously.
Wherein, in the time that lithium ion battery B is full of electric weight, its voltage is E, and capacity is Q. In testing process, by Full Charge CapacityLithium ion battery B be connected to the circuit shown in Fig. 1, this lithium ion battery B and heating resistance wire Rt, current transformer T and current limlitingResistance R forming circuit loop. Therefore, lithium ion battery B will continue the certain current loss of output, i.e. discharge electricity amount Qad. And lithiumIon battery B is by gathering also forming circuit loop of resistance R _ f, and the voltage in this collection resistance R _ f is URf, its discharge electricity amount isQRf，URfAlso be the real-time voltage of lithium ion battery B.
In the present invention, realization is as follows to the detection of lithium ion battery B capacity:
In the time that the lithium ion battery B of Full Charge Capacity accesses the circuit shown in Fig. 1, the timing module of single-chip microcomputer starts, and starts meterTime. The acquisition module of single-chip microcomputer is the output voltage U to lithium ion battery B in real timeRfWith output current ItMonitor, work as lithium ionThe output voltage U of battery BRfDuring lower than the safe-discharge voltage of lithium ion battery B, stop the electric discharge to lithium ion battery B, now noteT discharge time of record lithium ion battery B. The computing module of single-chip microcomputer calculates in discharge time t, and lithium ion battery B altogetherThe numerical value of discharge electricity amount, is the capacity of lithium ion battery B, and is shown by display module, is beneficial to observe.
In order conveniently to introduce the method for this lithium ion battery B capacity check, we can suppose single-chip microcomputer monitoring lithium ionThe output voltage U of battery BRfWith output current ItThe time interval be 1 second, be 1 hour total discharge time, i.e. adopting of single-chip microcomputerCollection module is carried out AD acquisition time and is spaced apart 1 second, gathers altogether 3600 times, and timing module altogether timing be 1 hour.
Obtained by above-mentioned, in the time of the t moment, the voltage gathering in resistance R _ f is URft, discharge electricity amount QRftFor: QRft=1s*URft/ Rf. Therefore, in 1 hour, the discharge electricity amount gathering in resistance R _ f isIn like manner can obtain, when t moment,The current value of the collection resistance R of flowing through ad is It, the discharge electricity amount of t moment lithium ion battery B is: Qadt=1000It* 1s. And oneIn hour, the discharge electricity amount of lithium ion battery B is:So total discharge electricity amount of lithium ion battery B is: Q=Qad+QRfThereby, calculate the total discharge capacity of lithium ion battery B in unit 1 hour, i.e. the capability value of lithium ion battery, andShown by display module. Above-mentioned calculation of capacity process is to complete in the computing module of single-chip microcomputer.
It should be noted that, in testing process, by the effect of current transformer T, flowing through that single-chip microcomputer detects adoptedWhat the current value of current collection resistance Rad was made up of lithium ion battery B, heating resistance wire Rt, current-limiting resistance R and current transformer T returns1/1000 of the current value on road, therefore in the computational process of computing module, while calculating discharge electricity amount, need to be multiplied by 1000, thisCan correctly calculate the discharge electricity amount of lithium ion battery B.
Consulting shown in Fig. 2, is the structural representation of capacity of lithium ion battery sorter of the present invention. This lithium ion battery holdsAmount sorter comprises N capacity of lithium ion battery separation unit, and is used in conjunction with single-chip microcomputer 1. This capacity of lithium ion battery dividesThe structure of menu unit is identical with the structure shown in above-mentioned Fig. 1, does not repeat them here. By this capacity of lithium ion battery sorter,Can detect multiple lithium ion battery (B simultaneously ... Bn), as long as the AD acquisition port of single-chip microcomputer is abundant.
Consulting shown in Fig. 3, is the workflow diagram of capacity of lithium ion battery sorter of the present invention. First, by full capacityLithium ion battery access capacity of lithium ion battery sorter in; Subsequently, single-chip microcomputer gathers Real-Time Monitoring lithium-ion electric by ADThe output voltage in pond and output current; Finally, single-chip microcomputer calculates the numerical value of the capacity Q of lithium ion battery, and shows.
In a word, the detection by capacity of lithium ion battery sorter of the present invention to capacity of lithium ion battery, can make everyIndividual lithium ion battery has just possessed capacity information before use, then capability value is equated or close multiple lithium ion batteriesSeries connection and/or in parallel use, can increase substantially service efficiency and the security of lithium ion battery group, extends lithium ion simultaneouslyThe service life of battery pack. Meanwhile, the present invention is reasonable in design, cost is low, easy and simple to handle and reliability is high, can be applied to lithium fromSub-battery outgoing detector or lithium ion battery use the checkout gear before assembling.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, thoughSo the present invention discloses as above with preferred embodiment, but is not in order to limit the present invention, is anyly familiar with this professional technology peopleMember, is not departing within the scope of technical solution of the present invention, when utilizing the technology contents of above-mentioned announcement to make a little change or modificationFor the equivalent embodiment of equivalent variations, be the content that does not depart from technical solution of the present invention in every case, according to technical spirit of the present inventionAny simple modification, equivalent variations and modification that above embodiment is done, all still belong in the scope of technical solution of the present invention.
Claims (5)
1. a capacity of lithium ion battery sorter, is characterized in that it comprises that at least one capacity of lithium ion battery divides menuUnit;
This capacity of lithium ion battery separation unit comprises lithium ion battery B, heating resistance wire Rt, current-limiting resistance R, gathers resistance R _ fWith Rad, current transformer T; Wherein, above-mentioned lithium ion battery B, heating resistance wire Rt, current-limiting resistance R and current transformer TBe serially connected composition loop, this collection resistance R ad and this current transformer T are connected in parallel, simultaneously this collection resistance R _ f andLithium ion battery B is connected in parallel; This collection resistance R _ f is connected with single-chip microcomputer with the two ends that gather resistance R ad.
2. capacity of lithium ion battery sorter according to claim 1, is characterized in that wherein this heating resistance wire Rt choosingUse nichrome heating resistance wire.
3. capacity of lithium ion battery sorter according to claim 1, is characterized in that wherein this current-limiting resistance R selects goldBelong to film wire resistor.
4. capacity of lithium ion battery sorter according to claim 1, is characterized in that wherein this collection resistance R _ f and RadSelect paster film resistor.
5. capacity of lithium ion battery sorter according to claim 1, is characterized in that wherein this current transformer T selectsInput and output are than the Hall element for 1000:1.
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| CN201310567552.6A CN103616642B (en) | 2013-11-13 | 2013-11-13 | Capacity of lithium ion battery sorter |
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| CN103616642B true CN103616642B (en) | 2016-05-11 |
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| JP2004031254A (en) * | 2002-06-28 | 2004-01-29 | Nissan Motor Co Ltd | Capacity control device and method for battery pack |
| CN101163980A (en) * | 2005-04-20 | 2008-04-16 | 赛昂能源有限公司 | Lithium sulfur rechargeable battery fuel gauge systems and methods |
| CN102081143A (en) * | 2009-11-27 | 2011-06-01 | 宏达国际电子股份有限公司 | Estimation method and system of battery capacity |
| CN102207542A (en) * | 2010-02-18 | 2011-10-05 | 通用汽车环球科技运作有限责任公司 | AGM battery recovery and capacity tester |
| CN202975283U (en) * | 2012-12-21 | 2013-06-05 | 江苏省电力公司镇江供电公司 | Remote intelligent maintenance device for transformer substation storage battery |
| CN203551750U (en) * | 2013-11-13 | 2014-04-16 | 凯迈(洛阳)电子有限公司 | Lithium ion battery capacity sorter |
-
2013
- 2013-11-13 CN CN201310567552.6A patent/CN103616642B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09308117A (en) * | 1996-05-17 | 1997-11-28 | Toyota Motor Corp | Battery residual capacity measuring device |
| JP2004031254A (en) * | 2002-06-28 | 2004-01-29 | Nissan Motor Co Ltd | Capacity control device and method for battery pack |
| CN101163980A (en) * | 2005-04-20 | 2008-04-16 | 赛昂能源有限公司 | Lithium sulfur rechargeable battery fuel gauge systems and methods |
| CN102081143A (en) * | 2009-11-27 | 2011-06-01 | 宏达国际电子股份有限公司 | Estimation method and system of battery capacity |
| CN102207542A (en) * | 2010-02-18 | 2011-10-05 | 通用汽车环球科技运作有限责任公司 | AGM battery recovery and capacity tester |
| CN202975283U (en) * | 2012-12-21 | 2013-06-05 | 江苏省电力公司镇江供电公司 | Remote intelligent maintenance device for transformer substation storage battery |
| CN203551750U (en) * | 2013-11-13 | 2014-04-16 | 凯迈(洛阳)电子有限公司 | Lithium ion battery capacity sorter |
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