CN103894350B - The partial volume screening method for group matching of cylindrical lithium battery - Google Patents
The partial volume screening method for group matching of cylindrical lithium battery Download PDFInfo
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- CN103894350B CN103894350B CN201410116941.1A CN201410116941A CN103894350B CN 103894350 B CN103894350 B CN 103894350B CN 201410116941 A CN201410116941 A CN 201410116941A CN 103894350 B CN103894350 B CN 103894350B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012216 screening Methods 0.000 title claims abstract description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 238000010281 constant-current constant-voltage charging Methods 0.000 claims description 8
- 230000011218 segmentation Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010923 batch production Methods 0.000 abstract description 3
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000007600 charging Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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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Abstract
The present invention relates to the manufacture method of lithium ion battery, particularly relate to the partial volume screening method for group matching of a kind of cylindrical lithium battery.Shorten the production cycle, saved the purpose of production cost and the energy for solving.The technical solution used in the present invention is: cell first carries out appearance test, then goes up partial volume test cabinet, shelves；Self discharge voltage screens, and is individually indicated by undesirable for the voltage undercarriage that carries out；Then self-discharge capacity screening, constant-current discharge, electric current 0.5C, be discharged to blanking voltage.It is an advantage of the current invention that technological parameter arranges reasonable standard, shortens the production cycle, effectively saved production cost and the energy；The method is easy to operate, improve cycle performance and the security performance of set of cells, is suitable for batch production, not only ensure that product quality requirement, and cell process test is provided foundation.
Description
Technical field
The present invention relates to the manufacture method of lithium ion battery, particularly relate to the partial volume screening method for group matching of a kind of cylindrical lithium battery.
Background technology
Lithium ion battery is as environmental protection new forms of energy, and good reliability, safety is high, volume is little, lightweight, be widely used and progressively substitute existing plumbic acid and NI-G Ni-MH battery；Battery technique is more and more ripe, and it is the fiercest that the competition of each producer increasingly comes, and the concordance quality of battery combination is even more important for raising product quality, reduction production cost, and rational partial volume screening method for group matching can improve battery cyclic life-span and security performance.
Summary of the invention
It is an object of the invention to provide a kind of method of the group gas-mixing screening of a kind of capacity for battery, voltage, internal resistance, shorten the production cycle, saved the purpose of production cost and the energy for solving.
For achieving the above object, the technical solution used in the present invention is:
The partial volume screening method for group matching of a kind of cylindrical lithium battery, is characterized in that, the method is carried out in accordance with the following steps:
(1) cell first carries out appearance test, then goes up partial volume test cabinet, shelves；
(2) screening of self discharge voltage, individually indicates undesirable for the voltage undercarriage that carries out；
(3) then self-discharge capacity is screened, constant-current discharge, and electric current 0.5C is discharged to blanking voltage；In this work step, the battery capacity after constant-current discharge should be greater than indicating the 96% of lowest capacity section, and is individually indicated by the undesirable undercarriage that carries out；
(4) charge/discharge capacity screening: constant-current constant-voltage charging, electric current 0.5C, cut-off current 0.01C, charges to full power state and shelves；Constant-current discharge, electric current 0.5C, it is discharged to blanking voltage and shelves；Constant-current constant-voltage charging, electric current 0.5C, charge to half electricity condition；Require qualified battery capacity is carried out segmentation sign according to capacity combo, and carry out lay-down location reason.
Partial volume screening method for group matching according to described cylindrical lithium battery, it is characterized in that: will meet combo capacity required section and shelve complete battery by inner walkway instrument carries out voltage section on request, internal resistance section screen and indicated, the partial volume completing battery screens combo.
It is an advantage of the current invention that technological parameter arranges reasonable standard, shortens the production cycle, effectively saved production cost and the energy；The method is easy to operate, improve cycle performance and the security performance of set of cells, is suitable for batch production, not only ensure that product quality requirement, and cell process test is provided foundation.
Detailed description of the invention
Below by specific embodiment, the invention will be further described:
The partial volume screening method for group matching of a kind of cylindrical lithium battery, is characterized in that, the method is carried out in accordance with the following steps:
(1) cell first carries out appearance test, then goes up partial volume test cabinet, shelves；
(2) screening of self discharge voltage, individually indicates undesirable for the voltage undercarriage that carries out；
(3) then self-discharge capacity is screened, constant-current discharge, and electric current 0.5C is discharged to blanking voltage；In this work step, the battery capacity after constant-current discharge should be greater than indicating the 96% of lowest capacity section, and is individually indicated by the undesirable undercarriage that carries out；
(4) charge/discharge capacity screening: constant-current constant-voltage charging, electric current 0.5C, cut-off current 0.01C, charges to full power state and shelves；Constant-current discharge, electric current 0.5C, it is discharged to blanking voltage and shelves；Constant-current constant-voltage charging, electric current 0.5C, charge to half electricity condition；Require qualified battery capacity is carried out segmentation sign according to capacity combo, and carry out lay-down location reason.
The partial volume screening method for group matching of a kind of cylindrical lithium battery according to claim 1, it is characterized in that: will meet combo capacity required section and shelve complete battery by inner walkway instrument carries out voltage section on request, internal resistance section screen and indicated, the partial volume completing battery screens combo.
Case study on implementation: a kind of 36V12Ah(18650-1500mAh-3.2V 12 goes here and there 8 also) the partial volume screening method for group matching step of cylindrical lithium battery is as follows,
Cell first carries out appearance test, then goes up partial volume test cabinet, and capacity partial volume work step is as follows:
1. shelve 5min；Monomer battery voltage is qualified between 3.33-3.40V；
2. constant-current discharge: electric current 0.5C, blanking voltage 2.5V；Capacity >=1440mAh is qualified；
3. shelve 5min；
4. constant-current constant-voltage charging: electric current 0.5C, charging upper limit voltage 3.65V, cut-off current 0.01C, charging interval 180min；
5. shelve 5min；
6. constant-current discharge: electric current 0.5C, blanking voltage 2.5V；
7. shelve 5min；
8. constant-current constant-voltage charging: electric current 0.5C, charging upper limit voltage 3.65V, charging interval 100min；
9. terminate；
Be battery actual capacity by partial volume work step 6 discharge capacity, according to combo, undercarriage also requires that carrying out every capacity section segmentation within capacity stepping, such as capacity difference 30mAh indicates；30mAh capacity difference 1480-1510mAh, 1510-1540mAh etc..
10. shelve；By battery normal temperature shelf 3*24h complete for capacity stepping, carry out voltage, internal resistance screening combo；
11. internal resistance test device test unit cell voltages, internal resistance also indicate: voltage request at 3.33-3.40V, such as voltage difference 20mV, such as: 3.33-3.34V, 3.35-3.36V；Internal resistance ＜ 60m Ω；Such as internal resistance difference 3m Ω, such as: 37-39m Ω, 40-42m Ω；
According to 36V12Ah(18650-1500mAh-3.2V 12 go here and there 8 and) 12*8=96 props up that battery combo requires that voltage difference, internal resistance be poor, capacity difference is all in the range of same shelves；As: 96 monomer battery voltage scopes are all at 3.35-3.36V；Internal resistance scope is at 37-39m Ω；Range of capacity is in 1510-1540mAh.
Present invention process parameter arranges reasonable standard, has effectively saved production cost and the energy；The method is easy to operate, improve combo concordance, cycle performance and the security performance of set of cells, is suitable for batch production, not only ensure that product quality requirement, and cell process test is provided foundation.
Embodiment described above is only to be described the preferred embodiment of the present invention; not design and protection domain to the present invention are defined; on the premise of without departing from design concept of the present invention; various modification that in this area, technical scheme is made by ordinary skill technical staff and improvement, all should fall into protection scope of the present invention.
Claims (2)
1. a partial volume screening method for group matching for cylindrical lithium battery, is characterized in that, the method is carried out in accordance with the following steps:
(1) cell first carries out appearance test, then goes up partial volume test cabinet, shelves；
(2) screening of self discharge voltage, individually indicates undesirable for the voltage undercarriage that carries out；
(3) then self-discharge capacity is screened, constant-current discharge, and electric current 0.5C is discharged to blanking voltage；In this work step, the battery capacity after constant-current discharge should be greater than indicating the 96% of lowest capacity section, and is individually indicated by the undesirable undercarriage that carries out；
(4) charge/discharge capacity screening: constant-current constant-voltage charging, electric current 0.5C, cut-off current 0.01C, charges to full power state and shelves；Constant-current discharge, electric current 0.5C, it is discharged to blanking voltage and shelves；Constant-current constant-voltage charging, electric current 0.5C, charge to half electricity condition；Require qualified battery capacity is carried out segmentation sign according to capacity combo, and carry out lay-down location reason.
The partial volume screening method for group matching of a kind of cylindrical lithium battery the most according to claim 1, it is characterized in that: will meet combo capacity required section and shelve complete battery by inner walkway instrument carries out voltage section on request, internal resistance section screen and indicated, the partial volume completing battery screens combo.
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| CN201410116941.1A CN103894350B (en) | 2014-03-26 | 2014-03-26 | The partial volume screening method for group matching of cylindrical lithium battery |
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| CN201410116941.1A CN103894350B (en) | 2014-03-26 | 2014-03-26 | The partial volume screening method for group matching of cylindrical lithium battery |
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| CN103894350B true CN103894350B (en) | 2016-08-24 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624524B (en) * | 2014-12-26 | 2017-04-26 | 东莞市金源电池科技有限公司 | Screening method for lithium ion battery consistency grouping through voltage recovery difference |
| CN105182244A (en) * | 2015-09-02 | 2015-12-23 | 国网上海市电力公司 | Battery test matching screening method |
| CN105911477B (en) * | 2016-04-14 | 2019-01-22 | 合肥国轩高科动力能源有限公司 | A kind of screening technique of power lithium-ion battery self discharge |
| CN106824831A (en) * | 2016-12-19 | 2017-06-13 | 金同林 | A kind of manufacture method of the motive-power battery for improving lithium ion battery uniformity |
| CN109786874B (en) * | 2018-12-26 | 2022-06-07 | 江苏春兰清洁能源研究院有限公司 | Capacity grading method of lithium ion battery |
| CN110911757B (en) * | 2019-10-25 | 2020-11-10 | 合肥国轩高科动力能源有限公司 | Safe capacity grading method for ternary lithium battery |
| CN111505521A (en) * | 2020-06-12 | 2020-08-07 | 国网天津市电力公司电力科学研究院 | Method for testing storage life of lithium secondary battery in accelerated manner |
| CN113441424B (en) * | 2021-06-17 | 2023-05-05 | 天科新能源有限责任公司 | Matching method of lithium iron phosphate lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101714663A (en) * | 2009-11-19 | 2010-05-26 | 珠海华冠电子科技有限公司 | Automatic formation and separation method of nickel-metal hydride batteries |
| JP2011145074A (en) * | 2010-01-12 | 2011-07-28 | Mitsui Eng & Shipbuild Co Ltd | Cell sorter, flow cytometer, and cell sorting method |
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Address after: 277800 No. x6699, Guangming Road, high tech Zone, Zaozhuang City, Shandong Province (north of the junction of Guangming Road and Huaxin Road) Patentee after: Shandong Jinggong Electronic Technology Co.,Ltd. Address before: 277800 Shandong Zaozhuang high tech Zone Thailand Industrial Park Fuyuan five road hight Electronics Group Patentee before: Shandong Seiko Electronic Technology Co.,Ltd. |
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Effective date of registration: 20231102 Address after: 277800 building 3, No. x6699, Guangming Road, high tech Zone, Zaozhuang City, Shandong Province (north of the junction of Guangming Road and Huaxin Road) Patentee after: Shandong Jinggong Power Technology Co.,Ltd. Address before: 277800 No. x6699, Guangming Road, high tech Zone, Zaozhuang City, Shandong Province (north of the junction of Guangming Road and Huaxin Road) Patentee before: Shandong Jinggong Electronic Technology Co.,Ltd. |