CN107838057A - Quick sorting method for ternary lithium ion batteries - Google Patents
Quick sorting method for ternary lithium ion batteries Download PDFInfo
- Publication number
- CN107838057A CN107838057A CN201710948100.0A CN201710948100A CN107838057A CN 107838057 A CN107838057 A CN 107838057A CN 201710948100 A CN201710948100 A CN 201710948100A CN 107838057 A CN107838057 A CN 107838057A
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- China
- Prior art keywords
- constant
- voltage
- current
- battery
- lithium ion
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a rapid sorting method of ternary lithium ion batteries, which comprises the following steps: selecting N constant-volume batteries, respectively charging to a charging termination voltage at a constant current of a rated current, then charging to a predetermined current at a constant voltage of the charging termination voltage, standing, then discharging to a discharging termination voltage at a constant current of the rated current, and recording the discharging capacity of the N constant-volume batteries; performing DOD-OCV test according to the discharge capacity of the N constant-volume batteries to obtain a DOD-OCV relation; taking a battery to be sorted, charging the battery to be sorted to a charging termination voltage at a constant current of a rated current, then charging the battery to be sorted to a preset current at a constant voltage of the charging termination voltage, standing, then discharging at a constant capacity of the rated current, standing, and recording a static voltage; and calculating and sorting according to the relation of static voltage, constant capacity and DOD-OCV. The invention can reduce the capacity grading time and improve the production efficiency.
Description
Technical field
The present invention relates to technical field of lithium ion, and in particular to a kind of quick method for separating of ternary lithium ion battery.
Background technology
Lithium ion battery is because its high-energy-density and long circulation life are used widely, using lithium ion battery as power
During source, typically all after connection in series-parallel forming battery pack uses, and capacity attenuation is very fast, the life-span shorter asks existing afterwards in groups for battery
Topic, caused by this is due to battery nonuniformity.Battery pack is in combo, to the voltage of cell, internal resistance, appearance in battery pack
Amount has the high requirement of comparison.By research, find in battery pack combo, the capacity volume variance of cell is to influence battery pack
The uniformity key factor of discharge and recharge latter stage each cell, can cause that battery power discharge capacity is relatively low, and pressure difference is bigger than normal.
How simple, reliable method for separating is utilized, filter out battery as consistent as possible and carry out in groups, for lithium ion
Battery large-scale promotion application has important and scientific meaning.At present, capacity of lithium ion battery method for separating is to lithium-ion electric
The shortcomings of pond carries out multiple discharge and recharge, and the existence time cycle is long.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of ternary lithium ion battery quickly side of sorting
Method, the partial volume time is reduced to realize, improves the purpose of production efficiency.
A kind of quick method for separating of ternary lithium ion battery proposed by the present invention, comprises the following steps：
S1, N constant volume battery is chosen, it is then whole to charge respectively with rated current constant-current charge to end of charge voltage
Only voltage constant-voltage charge is stood, then only determined with rated current constant-current discharge to final discharging voltage, record N to scheduled current
Hold the discharge capacity of battery；
S2, the discharge capacity progress DOD-OCV tests according to N constant volume battery, draw DOD-OCV relations；
S3, battery to be sorted is taken, it is then permanent with end of charge voltage with rated current constant-current charge to end of charge voltage
Pressure charges to scheduled current, stands, and is then discharged with rated current constant volume amount, stands, and records quiescent voltage；
S4, calculated according to quiescent voltage, constant volume amount, DOD-OCV relations, sorted.
Preferably, in step 1, the time of standing is 30min.
Preferably, in step 3, the time once stood is 30min.
Preferably, in step 3, the time of secondary standing is 60min.
Above-mentioned scheduled current is battery constant-voltage charge cut-off current, and conventional size is 0.05C.
Above-mentioned DOD represents the depth of discharge of battery, i.e., the capacity that battery is released accounts for the percentage of its rated capacity.
Above-mentioned OCV represents open-circuit voltage, i.e. magnitude of voltage of the battery under open-circuit condition.
Above-mentioned end of charge voltage represents that during predetermined constant-current charge battery reaches magnitude of voltage during upper voltage limit.
When above-mentioned final discharging voltage refers to battery discharge, voltage, which drops to battery, should not be further continued for the minimum work electricity of electric discharge
Pressure value.
The size of constant volume amount is not construed as limiting in above-mentioned steps 3, is selected as the case may be.
Above-mentioned N values are not construed as limiting, and are selected as the case may be.
The constant volume electric discharge of the invention that only lithium ion battery need to first be charged again, you can carried out to the ternary lithium ion battery
Battery capacity sorts, compared with traditional partial volume method, the step of eliminating multiple discharge and recharge, and then reduce the partial volume time,
Improve production efficiency.
Brief description of the drawings
Fig. 1 is the DOD-OCV graphs of a relation of ternary lithium ion battery of the present invention.
Embodiment
Below, technical scheme is described in detail by specific embodiment.
Embodiment 1
A kind of quick method for separating of ternary lithium ion battery, comprises the following steps：
S1, to choose five rated capacities be 38Ah ternary lithium ion batteries, respectively with rated current 38A constant-current charges to filling
Electric final voltage 4.2V, then with end of charge voltage 4.2V constant-voltage charges to scheduled current 1.9A, stand 30min, then with
To final discharging voltage 3.0V, the discharge capacity for recording five ternary lithium ion batteries is rated current 38A constant-current discharges
38.42Ah、39.16Ah、38.86Ah、38.72Ah、39.32Ah；
S2, to take five rated capacities be 38Ah ternary lithium ion batteries, is charged to respectively with rated current 38A constant currents
Electric final voltage 4.2V, scheduled current 1.9A is then charged to end of charge voltage 4.2V, stand 30min, then carry out
DOD-OCV test, with rated current 38A constant volumes amount discharge, the constant volume amount be respectively 0.7684Ah, 0.7832Ah,
0.7772Ah, 0.7744Ah, 0.7864Ah, 60min is stood, record discharge voltage, by above-mentioned method of testing circulate operation to putting
Piezoelectric voltage lower limit reaches 3.0V, draws DOD-OCV graphs of a relation (reference picture 1)；
S3, battery to be sorted is taken, it is then whole to charge with rated current 38A constant-current charges to end of charge voltage 4.2V
Only voltage 4.2V constant-voltage charges are quiet then with rated current 38A constant volumes amount electric discharge 36Ah to scheduled current 1.9A, standing 30min
60min is put, record quiescent voltage is 3.483V；
S4, according to DOD-OCV graphs of a relation, quiescent voltage is converted into DOD values as 91.1%, battery capacity 36/
91.1%=39.52Ah；
Battery to be sorted is taken with rated current 38A constant-current charges to end of charge voltage 4.2V, then with charging termination electricity
4.2V constant-voltage charges are pressed 30min to be stood, then with rated current 38A constant-current discharges to discharge off electricity to scheduled current 1.9A
3.0V is pressed, stands 30min, circulate operation three times, average discharge capacity 39.32Ah, sorts capacity accuracy rate as stated above
Reach 99.49%.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (4)
1. a kind of quick method for separating of ternary lithium ion battery, it is characterised in that comprise the following steps：
S1, N constant volume battery is chosen, respectively with rated current constant-current charge to end of charge voltage, then with charging termination electricity
Constant-voltage charge is pressed to stand to scheduled current, then with rated current constant-current discharge to final discharging voltage, record N constant volume electricity
The discharge capacity in pond；
S2, the discharge capacity progress DOD-OCV tests according to N constant volume battery, draw DOD-OCV relations；
S3, battery to be sorted is taken, with rated current constant-current charge to end of charge voltage, then filled with end of charge voltage constant pressure
Electricity is once stood, then discharged with rated current constant volume amount, secondary standing, record quiescent voltage to scheduled current；
S4, calculated according to quiescent voltage, constant volume amount, DOD-OCV relations, sorted.
2. the quick method for separating of ternary lithium ion battery according to claim 1, it is characterised in that in step 1, standing when
Between be 30min.
3. the quick method for separating of ternary lithium ion battery according to claim 1 or claim 2, it is characterised in that in step 3, once
The time of standing is 30min.
4. according to any one of the claim 1-3 quick method for separating of ternary lithium ion battery, it is characterised in that in step 3,
The time of secondary standing is 60min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948100.0A CN107838057A (en) | 2017-10-12 | 2017-10-12 | Quick sorting method for ternary lithium ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948100.0A CN107838057A (en) | 2017-10-12 | 2017-10-12 | Quick sorting method for ternary lithium ion batteries |
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| Publication Number | Publication Date |
|---|---|
| CN107838057A true CN107838057A (en) | 2018-03-27 |
Family
ID=61661304
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710948100.0A Pending CN107838057A (en) | 2017-10-12 | 2017-10-12 | Quick sorting method for ternary lithium ion batteries |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742461A (en) * | 2018-12-29 | 2019-05-10 | 惠州市纬世新能源有限公司 | A method of to more string assembled battery combos |
| CN111239620A (en) * | 2020-01-18 | 2020-06-05 | 惠州西盛科技有限公司 | Battery performance judgment method |
| CN112421139A (en) * | 2020-11-27 | 2021-02-26 | 惠州亿纬锂能股份有限公司 | Production process of lithium ion battery |
| EP3933423A1 (en) * | 2020-07-01 | 2022-01-05 | Commissariat à l'Energie Atomique et aux Energies Alternatives | Method for testing one or a plurality of microbattery devices and system implementing the testing method |
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| JP2001096236A (en) * | 1999-09-29 | 2001-04-10 | Toshiba Corp | Device for classifying battery pack |
| CN102200568A (en) * | 2010-03-24 | 2011-09-28 | 力旺电子股份有限公司 | Method of estimating remaining capacity and run-time of a battery device |
| CN102608535A (en) * | 2012-02-27 | 2012-07-25 | 宁德新能源科技有限公司 | Method for pre-measuring volume of lithium ion battery |
| CN105903692A (en) * | 2016-05-19 | 2016-08-31 | 四川长虹电器股份有限公司 | Lithium ion battery consistency screening method |
| CN106646256A (en) * | 2016-12-21 | 2017-05-10 | 惠州Tcl金能电池有限公司 | Battery capacity calculating method |
| CN107127166A (en) * | 2017-05-22 | 2017-09-05 | 广东亿纬赛恩斯新能源系统有限公司 | A kind of method for separating and lithium battery of lithium battery uniformity |
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2017
- 2017-10-12 CN CN201710948100.0A patent/CN107838057A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001096236A (en) * | 1999-09-29 | 2001-04-10 | Toshiba Corp | Device for classifying battery pack |
| CN102200568A (en) * | 2010-03-24 | 2011-09-28 | 力旺电子股份有限公司 | Method of estimating remaining capacity and run-time of a battery device |
| CN102608535A (en) * | 2012-02-27 | 2012-07-25 | 宁德新能源科技有限公司 | Method for pre-measuring volume of lithium ion battery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742461A (en) * | 2018-12-29 | 2019-05-10 | 惠州市纬世新能源有限公司 | A method of to more string assembled battery combos |
| CN111239620A (en) * | 2020-01-18 | 2020-06-05 | 惠州西盛科技有限公司 | Battery performance judgment method |
| EP3933423A1 (en) * | 2020-07-01 | 2022-01-05 | Commissariat à l'Energie Atomique et aux Energies Alternatives | Method for testing one or a plurality of microbattery devices and system implementing the testing method |
| FR3112213A1 (en) * | 2020-07-01 | 2022-01-07 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Test method (s) of one or a plurality of microbattery devices and system implementing the test method (s) |
| US11474155B2 (en) | 2020-07-01 | 2022-10-18 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Method for testing one or a plurality of microbattery devices, and system implementing the testing method |
| CN112421139A (en) * | 2020-11-27 | 2021-02-26 | 惠州亿纬锂能股份有限公司 | Production process of lithium ion battery |
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Application publication date: 20180327 |