CN1508901A - Method for scparating secodary cell - Google Patents
Method for scparating secodary cell Download PDFInfo
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- CN1508901A CN1508901A CNA02156793XA CN02156793A CN1508901A CN 1508901 A CN1508901 A CN 1508901A CN A02156793X A CNA02156793X A CN A02156793XA CN 02156793 A CN02156793 A CN 02156793A CN 1508901 A CN1508901 A CN 1508901A
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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
Abstract
Secondary batteries to be tested are set to device for testing charging/discharging characteristics in sequence. Results of capacity value, characteristic curves of charging/discharging voltage and current of each secondary battery obtained in real time are stored in computer. Region of capacity of selected secondary battery is determined. Comparision of data and curves is carried out for value of capacity, characteristic curves of charging/discharging voltage and current of each secondary battery with required value of capacity. A set of characteristic curves of voltage and current met requirements is selected as reference curve. Several match points and their deviation ranges are selected on the two curves. The battery with its characteristic curves within deviation ranges of reference curves is selected out. The invention simplifies procedure for selecting secondary battery. The method provides high selecting quality and easy of use.
Description
Technical field
The present invention relates to battery detecting sorting technology field, relate in particular to the combine method of separating secondary cell of a kind of voltage response that utilizes battery and current characteristics curve.
Background technology
Along with the progressively embodiment of secondary cell use advantage, the range of application of secondary cell (not only refer to cell, and comprise assembled battery) is more and more wide.Secondary battery is to be formed by the assembling of more piece monomer secondary cell, therefore the characterisitic parameters such as cell capacity, internal resistance, surface temperature, self-discharge rate that only are combined into battery pack all reach unanimity, could guarantee total capacity height, the long service life of battery pack, cycle period is many.Therefore, all need detect sorting before secondary cell made up, and at present sorting is mainly method by voltage response sorting or partial volume to secondary cell, can guarantee to sub-elect the consistency of battery for the secondary cell that is in the constant current charge-discharge test all the time, such mode is suitable for adopting in the test process NI-G of constant current charge-discharge process, nickel-hydrogen secondary cell, but for other charging processes is the first constant current secondary cell of constant voltage again, as the lithium metal secondary batteries, lead-acid battery etc., because it is not complete constant current that secondary cell charges in test process, if sorting also adopts aforesaid way will have limitation greatly, the battery that can not guarantee to be sub-elected is at capacity, height unanimity on the characteristics such as internal resistance particularly is typical case's representative with the lithium rechargeable battery.
Summary of the invention
The method that the purpose of this invention is to provide a kind of secondary cell that is easy to implement, it utilizes the capacity of secondary cell and the mode that voltage response combines with the current characteristics curve in charge and discharge process, improves sorting quality.
For achieving the above object, the present invention takes following design:
A kind of method of separating secondary cell, it mainly comprises following step:
1, secondary cell is placed in the battery charging and discharging checkout equipment detects, testing process obtains and writes down the charging/discharging voltage characteristic curve and the current characteristics curve of every joint secondary cell by computer control, and the result is kept in the computer;
2, determine the range of capacity of selected secondary cell;
3, the charge-discharge characteristic curve of the secondary cell in the selected range of capacity is selected, selecting one group of charge-discharge characteristic curve (comprising voltage characteristic and current curve) satisfactory is reference voltage curve and reference current curve;
4, on reference voltage curve and reference current curve, select some contrast points respectively, provide the deviation range of contrast points:
5, the deviation range that satisfies according to the deviation range homogeneous phase at contrast points place on the deviation range at contrast points place on the specified voltage curve and the current curve, carry out sorting by computer, with on the capacity of every joint secondary cell and the voltage response with the current characteristics curve on the value and the contrast points at identical point place compare, all when in the range of capacity of appointment and with contrast points, comparing its value all the secondary cell in deviation range be selected battery.
Advantage of the present invention is:
1, simplified the process of separating secondary cell: voltage response combines with the current characteristics curve and judges the performance of battery in the capacity by battery and the charge and discharge process of battery, does not need internal resistance, surface temperature rise etc. to secondary cell to test again;
2, sorting quality height: employing capacity, voltage response can make the secondary cell that sub-elects have the altitude response unanimity in conjunction with the method sorting of current characteristics curve triplicity.
3, easy to use: as only to need as required in the assorting room, select the range of capacity of required sorting battery and curve deviation to carry out sorting arbitrarily to battery.
Description of drawings
Fig. 1 is a separating secondary cell method schematic block diagram of the present invention
Fig. 2 is the schematic diagram (I is a voltage response, and II is the current characteristics curve) of voltage response in the lithium rechargeable battery charge and discharge of the present invention and current characteristics curve
Voltage response and current characteristics curve chart when Fig. 3 is one group of charge and discharge state in the lithium rechargeable battery test process
Fig. 4 is voltage response and current characteristics curve chart during for the charge and discharge state in another group lithium rechargeable battery test process
Fig. 5 is datum curve and an allowed band deviation map among Fig. 4
Fig. 6 is the comparison diagram of curve ranges among battery 5,6,7 and Fig. 5 among Fig. 4
Fig. 7 is a joint lithium rechargeable battery datum curve figure.
Embodiment
The invention will be further described below in conjunction with drawings and the specific embodiments
As shown in Figure 1, the method for separating secondary cell of the present invention mainly comprises following step:
1), secondary cell is placed in the battery charging and discharging checkout equipment (existing device) successively and detects, testing process is by computer control (prior art), obtain and write down capacity, charging/discharging voltage characteristic curve and the current characteristics curve of every joint secondary cell, and the result is kept in the computer;
2), according to capacity, charging/discharging voltage characteristic curve and the current characteristics calibration curve information of the secondary cell that obtains, determine the range of capacity of selected secondary cell;
3) selecting interior one group of satisfactory voltage response of range of capacity and current characteristics curve is datum curve, selects some contrast points respectively on reference voltage curve and reference current curve, provides the deviation range of contrast points;
4) charge-discharge characteristic curve and the datum curve that accesses each secondary cell in the selected range of capacity compares selection;
5) will have the battery that corresponding points all drop on the charge-discharge characteristic curve in the some contrast points deviation ranges of datum curve selects as selected battery.
The charging/discharging voltage of secondary cells such as lithium ion and current characteristics curve shape are as shown in Figure 2, abscissa is time (min), ordinate is voltage (mV) and electric current (mA), its curve can be divided into constant current charge stage (AB), constant voltage charge stage (BC), discharge and recharge (CD) and constant-current discharge stage (DE) at interval, can select when the sorting battery that some points are datum mark on the voltage response in constant current charge stage, constant voltage charge stage, constant-current discharge stage and the current characteristics curve, the battery sorting of contrast points in datum mark specification error scope come out.
The method of separating secondary cell of the present invention is applicable to the secondary cell (only being example with the lithium rechargeable battery) of all kinds and various models.
Embodiment 1
Some joints lithium rechargeable battery to be measured is placed on discharging and recharging in the checkout gear of lithium rechargeable battery, detect, obtain capacity and voltage, electric current charge-discharge characteristic curve, input computer, computer carry out data, figure line relatively, curve as shown in Figure 3, abscissa is a time T, and ordinate is voltage V, electric current I, determines that range of capacity is at 1695-1705mAH, select four batteries, numbering is respectively: 1,2,3,4; Its capacity such as following table:
| Battery | ????1 | ????2 | ????3 | ????4 |
| Capacity (mAH) | ????1697 | ????1700 | ????1699 | ????1703 |
Selecting the voltage response and the current characteristics curve of the 3rd batteries is datum curve, press 1 in the abscissa, 2,3,4,5,6,7,8,9,10,11 pairing contrast points: the some a1 on the curve of voltage, b1, c1, d1, e1, f1, g1, h1, i1, J1, k1, deviation range is: ± 50mv, some a2 on the current characteristics curve, b2, c2, d2, e2, f2, g2, h2, i2, j2, k2, deviation range is: ± 20mA, select the value such as the following table that obtain every batteries corresponding point position: (wherein * 1 is current value, " 2 is magnitude of voltage) unit: (voltage: mV; electric current: mA)
| ????d2 | ????4150 | ????4150 | ????4150 | ????4150 | |
| ????5 | ????e1 | ????116 | ????142 | ????133 | ????114 |
| ????e2 | ????4150 | ????4150 | ????4150 | ????4150 | |
| ????6 | ????f1 | ????0 | ????0 | ????0 | ????0 |
| ????f2 | ????4128 | ????4120 | ????4123 | ????4131 | |
| ????7 | ????g1 | ????600 | ????600 | ????600 | ????600 |
| ????g2 | ????3859 | ????3829 | ????3831 | ????3862 | |
| ????8 | ????h1 | ????600 | ????600 | ????600 | ????600 |
| ????h2 | ????3738 | ????3708 | ????3699 | ????3741 | |
| ????9 | ????i1 | ????600 | ????600 | ????600 | ????600 |
| ????i2 | ????3654 | ????3630 | ????3619 | ????3660 | |
| ????10 | ????i1 | ????600 | ????600 | ????600 | ????600 |
| ????i2 | ????3601 | ????3582 | ????3576 | ????3609 | |
| ????11 | ????k1 | ????600 | ????600 | ????600 | ????600 |
| ????k(2 | ????3528 | ????3516 | ????3505 | ????3541 |
As can be seen from the above table, some a1 on the curve of the voltage of battery 1, b1, c1, d1, e1, f1, g1, h1, i1, j1, k1, some a2 on the current characteristics curve, b2, c2, d2, e2, f2, g2, h2, i2, j2, some a1 on the curve of the voltage of the value of k2 and battery 3, b1, c1, d1, e1, f1, g1, h1, i1, j1, the value deviation range of k1 is: ± 50mV, with the some a2 on the current characteristics curve, b2, C2, d2, e2, f2, g2, h2, i2, j2, the value deviation range of k2 is: ± 20mA, therefore battery 1 is selected battery, similarly battery 2 also is selected battery with battery 4, with battery 1,2,3,4 are combined into the quality that battery pack can guarantee battery pack.
Embodiment 2
Method with embodiment 1, selected battery 5,6,7,8 range of capacity is at 1750-1780mAH, its charge-discharge characteristic curve input computer, as shown in Figure 4, selecting the charge-discharge characteristic curve of battery 6 is datum curve, on the voltage curve every deviation range be ± 40mV in, on the current curve every deviation range be ± 20mA in, as shown in Figure 5, obtain the voltage I that reaches the standard grade thus, II rolls off the production line, the electric current III that reaches the standard grade, lower limit line IV is with battery 5, the curve ranges of 7 curve and battery 6 compares, as shown in Figure 6, battery 5,7,8 charge-discharge characteristic curve is all at the voltage I that reaches the standard grade, II rolls off the production line, the electric current III that reaches the standard grade, between the lower limit line IV, so battery 5,6,7,8 are selected battery, and said process is finished by computer.
Embodiment 3
64 joint lithium rechargeable batteries are placed on lithium rechargeable battery to discharge and recharge in the checkout equipment, with capacity and the voltage that obtains, electric current charge-discharge characteristic curve is all imported in the computer, determine that capacity is between 1720-1750mAH, select voltage as shown in Figure 7, electric current charge-discharge characteristic curve is a datum curve, select by computer, all capacity are between 1720-1750mAH, its voltage charge-discharge characteristic curve and electric current charge-discharge characteristic curve are similar to Fig. 7 is selected battery, promptly is not selected battery otherwise its voltage charge-discharge characteristic curve and electric current charge-discharge characteristic curve and Fig. 7 differ bigger.
Claims (4)
1, a kind of method of separating secondary cell is characterized in that mainly may further comprise the steps:
1. secondary cell is placed in the battery charging and discharging checkout equipment and detects, testing process obtains and writes down the charging/discharging voltage characteristic curve and the current characteristics curve of every joint secondary cell by computer control, and the result is kept in the computer;
2. determine the range of capacity of selected secondary cell;
3. the charge-discharge characteristic curve of the secondary cell in the selected range of capacity is selected, selecting one group of charge-discharge characteristic curve (comprising voltage characteristic and current curve) satisfactory is reference voltage curve and reference current curve;
4. on reference voltage curve and reference current curve, select some contrast points respectively, provide the deviation range of contrast points;
5. the deviation range that satisfies according to the deviation range homogeneous phase at contrast points place on the deviation range at contrast points place on the specified voltage curve and the current curve, carry out sorting by computer, with on the capacity of every joint secondary cell and the voltage response with the current characteristics curve on the value and the contrast points at identical point place compare, all when in the range of capacity of appointment and with contrast points, comparing its value all the secondary cell in deviation range be selected battery;
2, the method for separating secondary cell according to claim 1 is characterized in that: described current characteristics Curve selection is at the current characteristics curve of battery charge and discharge process.
3, the method for separating secondary cell according to claim 1 is characterized in that: can select contrast points and deviation range on the current characteristics curve of battery charge and discharge process;
4, the method for separating secondary cell according to claim 1, it is characterized in that: selecting current reference curve, voltage reference curve is correlation curve, provide curve deviation top/bottom latitude line, the charging/discharging voltage characteristic curve that will meet the battery of capability value is compared with correlation curve with the current characteristics curve, determines that charging/discharging voltage characteristic curve and the pairing battery of current characteristics curve in the last scope that rolls off the production line is selected battery.
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| CNB02156793XA CN1229890C (en) | 2002-12-18 | 2002-12-18 | Method for scparating secodary cell |
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| CNB02156793XA CN1229890C (en) | 2002-12-18 | 2002-12-18 | Method for scparating secodary cell |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364168C (en) * | 2005-04-27 | 2008-01-23 | 韩伟 | Method for sorting batteries according to battery volt-ampere curve |
| CN100399619C (en) * | 2005-09-20 | 2008-07-02 | 广州擎天实业有限公司 | Real-time tracking alarm secondary cell partial volume method |
| CN100555729C (en) * | 2005-08-18 | 2009-10-28 | 苏州富源科技能源有限公司 | A kind of method for fabricating energy stored lithium battery pile and a kind of energy storage lithium battery group |
| CN1876256B (en) * | 2005-06-06 | 2010-05-12 | 深圳市比克电池有限公司 | Battery screening system and method |
| CN101809841A (en) * | 2007-09-29 | 2010-08-18 | 英特尔公司 | Intelligent battery safety management |
| EP2474058A2 (en) * | 2009-09-01 | 2012-07-11 | Boston-Power, Inc. | Large scale battery systems and method of assembly |
| CN102698968A (en) * | 2012-06-07 | 2012-10-03 | 北京有色金属研究总院 | Method for sorting lithium-ion power batteries |
| CN102886352A (en) * | 2011-07-21 | 2013-01-23 | 湖北骆驼特种电源有限公司 | Group matching and sorting method of lithium iron phosphate batteries |
| CN103048627A (en) * | 2012-12-15 | 2013-04-17 | 安徽工程大学 | Storage battery matching instrument and matching method thereof |
| CN103592601A (en) * | 2012-08-17 | 2014-02-19 | 上海斐讯数据通信技术有限公司 | Test system automatically detecting battery capacity according to charging and discharging curves |
| CN105866701A (en) * | 2016-06-27 | 2016-08-17 | 上海电气钠硫储能技术有限公司 | Method for detecting uniformity of sodium-sulfur batteries |
| CN106154173A (en) * | 2016-06-24 | 2016-11-23 | 合肥国轩高科动力能源有限公司 | A kind of self discharge screening technique of the cheapest secondary cell easily |
| CN107024663A (en) * | 2017-04-01 | 2017-08-08 | 湖南银杏数据科技有限公司 | The lithium battery screening technique clustered based on charging curve feature KPCA |
| CN107976636A (en) * | 2017-11-17 | 2018-05-01 | 深圳市恒翼能科技有限公司 | Method and system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction |
| CN108020788A (en) * | 2017-10-27 | 2018-05-11 | 合肥国轩高科动力能源有限公司 | A kind of lithium ion battery internal resistance rapid screening method |
| CN109856546A (en) * | 2019-01-07 | 2019-06-07 | 银隆新能源股份有限公司 | Secondary battery material system detection method |
| CN110694946A (en) * | 2019-09-16 | 2020-01-17 | 合肥鸿叶紫新能源有限公司 | Method for rapidly sorting lithium ion batteries |
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| CN113238152A (en) * | 2021-05-10 | 2021-08-10 | 昆山聚创新能源科技有限公司 | Lithium battery self-discharge detection method |
| CN113675489A (en) * | 2021-07-01 | 2021-11-19 | 宁波维科电池有限公司 | Method for forming and screening bad cells |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100364168C (en) * | 2005-04-27 | 2008-01-23 | 韩伟 | Method for sorting batteries according to battery volt-ampere curve |
| CN1876256B (en) * | 2005-06-06 | 2010-05-12 | 深圳市比克电池有限公司 | Battery screening system and method |
| CN100555729C (en) * | 2005-08-18 | 2009-10-28 | 苏州富源科技能源有限公司 | A kind of method for fabricating energy stored lithium battery pile and a kind of energy storage lithium battery group |
| CN100399619C (en) * | 2005-09-20 | 2008-07-02 | 广州擎天实业有限公司 | Real-time tracking alarm secondary cell partial volume method |
| CN101809841B (en) * | 2007-09-29 | 2014-04-02 | 英特尔公司 | Intelligent battery safety management |
| CN101809841A (en) * | 2007-09-29 | 2010-08-18 | 英特尔公司 | Intelligent battery safety management |
| EP2474058A2 (en) * | 2009-09-01 | 2012-07-11 | Boston-Power, Inc. | Large scale battery systems and method of assembly |
| EP2819212A1 (en) * | 2009-09-01 | 2014-12-31 | Boston-Power, Inc. | Large scale battery systems and method of assembly |
| EP2474058A4 (en) * | 2009-09-01 | 2014-11-12 | Boston Power Inc | Large scale battery systems and method of assembly |
| CN102886352A (en) * | 2011-07-21 | 2013-01-23 | 湖北骆驼特种电源有限公司 | Group matching and sorting method of lithium iron phosphate batteries |
| CN102698968A (en) * | 2012-06-07 | 2012-10-03 | 北京有色金属研究总院 | Method for sorting lithium-ion power batteries |
| CN103592601A (en) * | 2012-08-17 | 2014-02-19 | 上海斐讯数据通信技术有限公司 | Test system automatically detecting battery capacity according to charging and discharging curves |
| CN103048627A (en) * | 2012-12-15 | 2013-04-17 | 安徽工程大学 | Storage battery matching instrument and matching method thereof |
| CN106154173A (en) * | 2016-06-24 | 2016-11-23 | 合肥国轩高科动力能源有限公司 | A kind of self discharge screening technique of the cheapest secondary cell easily |
| CN105866701B (en) * | 2016-06-27 | 2019-01-29 | 上海电气钠硫储能技术有限公司 | A kind of sodium-sulphur battery consistency detecting method |
| CN105866701A (en) * | 2016-06-27 | 2016-08-17 | 上海电气钠硫储能技术有限公司 | Method for detecting uniformity of sodium-sulfur batteries |
| CN107024663B (en) * | 2017-04-01 | 2019-04-05 | 湖南银杏数据科技有限公司 | Lithium battery screening technique based on charging curve feature KPCA cluster |
| CN107024663A (en) * | 2017-04-01 | 2017-08-08 | 湖南银杏数据科技有限公司 | The lithium battery screening technique clustered based on charging curve feature KPCA |
| CN108020788A (en) * | 2017-10-27 | 2018-05-11 | 合肥国轩高科动力能源有限公司 | A kind of lithium ion battery internal resistance rapid screening method |
| CN107976636A (en) * | 2017-11-17 | 2018-05-01 | 深圳市恒翼能科技有限公司 | Method and system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction |
| US10734689B2 (en) | 2017-11-17 | 2020-08-04 | Shenzhen Hynn Technologies Co., Ltd. | Method and system for reconstructing complete charging-discharging data based on partial charging-discharging data of battery |
| CN109856546A (en) * | 2019-01-07 | 2019-06-07 | 银隆新能源股份有限公司 | Secondary battery material system detection method |
| CN109856546B (en) * | 2019-01-07 | 2024-01-19 | 银隆新能源股份有限公司 | Secondary battery material system detection method |
| CN110694946A (en) * | 2019-09-16 | 2020-01-17 | 合肥鸿叶紫新能源有限公司 | Method for rapidly sorting lithium ion batteries |
| CN113238152A (en) * | 2021-05-10 | 2021-08-10 | 昆山聚创新能源科技有限公司 | Lithium battery self-discharge detection method |
| CN113675489A (en) * | 2021-07-01 | 2021-11-19 | 宁波维科电池有限公司 | Method for forming and screening bad cells |
| CN113996562A (en) * | 2021-11-23 | 2022-02-01 | 格林美股份有限公司 | Battery sorting method and device based on volt-ampere characteristic curve and electronic equipment |
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