CN103894350A - Capacitance-grading screening and grouping method for cylindrical lithium battery - Google Patents
Capacitance-grading screening and grouping method for cylindrical lithium battery Download PDFInfo
- Publication number
- CN103894350A CN103894350A CN201410116941.1A CN201410116941A CN103894350A CN 103894350 A CN103894350 A CN 103894350A CN 201410116941 A CN201410116941 A CN 201410116941A CN 103894350 A CN103894350 A CN 103894350A
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- screening
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- battery
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- 238000012216 screening Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 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 11
- 239000000178 monomer Substances 0.000 abstract description 7
- 238000010923 batch production Methods 0.000 abstract description 3
- 230000001351 cycling effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000007600 charging Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 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
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 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
Abstract
The invention relates to a manufacturing method for a lithium battery, in particular to a capacitance-grading screening and grouping method for a cylindrical lithium battery, which fulfills the aims of shortening a production cycle and saving the production cost and energy resources. The technical scheme adopted by the invention comprises the following steps: examining the appearance of monomer batteries first and then placing the monomer batteries on the capacitance-grading test cabinet; performing self-discharge voltage screening, taking the monomer batteries which do not meet the requirements down from a frame, and individually marking the monomer batteries; performing self-discharge capacitance screening, performing constant-current discharge with the current of 0.5 C, and discharging to a cut-off voltage. The method has the advantages that the process parameters are set reasonably in a standard way, the production period is shortened, the production cost and the energy resources are saved effectively; the method is easy to operate; the cycling performance and the safety performance of a battery pack are improved; the method is suitable for batch production; the product quality requirements of a product are guaranteed; moreover, basis is provided for monomer battery process inspection.
Description
Technical field
The present invention relates to the preparation method of lithium ion battery, relate in particular to a kind of partial volume screening method for group matching of cylindrical lithium battery.
Background technology
Lithium ion battery is as environmental protection new forms of energy, good reliability, safe, volume is little, lightweight, be widely used and progressively substitute existing plumbic acid and NI-G Ni-MH battery; Battery technique processed is more and more ripe, it is fiercer that the competition of each producer more and more comes, the uniformity quality of battery combination is even more important for improving the quality of products, reducing production costs, and reasonably partial volume screening method for group matching can improve battery pack cycle life and security performance.
Summary of the invention
The object of this invention is to provide a kind of method of the group gas-mixing screening of a kind of capacity for battery, voltage, internal resistance, for solving the object that shortens the production cycle, saved production cost and the energy.
For achieving the above object, the technical solution used in the present invention is:
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) self discharge voltage screening, indicates the undesirable voltage undercarriage that carries out separately;
(3) then self discharge capacity screening, constant-current discharge, electric current 0.5C, is discharged to blanking voltage; Battery capacity in this work step after constant-current discharge should be greater than 96% of sign lowest capacity section, and the undesirable undercarriage that carries out is indicated separately;
(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, is discharged to blanking voltage and shelves; Constant-current constant-voltage charging, electric current 0.5C, charges to half electricity condition; Require qualified battery capacity to carry out segmentation sign according to capacity combo, and carry out lay-down location reason.
According to the partial volume screening method for group matching of described cylindrical lithium battery, it is characterized in that: by meet combo capacity required section and shelve complete battery by internal resistance test device device carry out voltage section on request, internal resistance section is screened and is indicated, and completes the partial volume screening combo of battery.
The invention has the advantages that, technological parameter arranges reasonable standard, has shortened the production cycle, has effectively saved production cost and the energy; Cycle performance and security performance that the method is easy to operate, improved battery pack, be suitable for batch production, not only ensured product quality requirement, and provide foundation to cell process test.
Detailed description of the invention
Below by specific embodiment, the invention will be further described:
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) self discharge voltage screening, indicates the undesirable voltage undercarriage that carries out separately;
(3) then self discharge capacity screening, constant-current discharge, electric current 0.5C, is discharged to blanking voltage; Battery capacity in this work step after constant-current discharge should be greater than 96% of sign lowest capacity section, and the undesirable undercarriage that carries out is indicated separately;
(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, is discharged to blanking voltage and shelves; Constant-current constant-voltage charging, electric current 0.5C, charges to half electricity condition; Require qualified battery capacity to carry 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: by meet combo capacity required section and shelve complete battery by internal resistance test device device carry out voltage section on request, internal resistance section is screened and is indicated, and completes the partial volume screening combo of battery.
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. finish;
Be battery actual capacity by partial volume work step 6 discharge capacities, undercarriage also requires to carry out capacity stepping according to combo, and for example capacity difference 30mAh indicates with interior every capacity section segmentation; 30mAh capacity difference 1480-1510mAh, 1510-1540mAh etc.
10. shelve; By battery normal temperature shelf 3*24h complete capacity stepping, carry out voltage, internal resistance screening combo;
11. internal resistance test device test unit cell voltages, internal resistance also indicate: voltage request is at 3.33-3.40V, for example voltage difference 20mV, as: 3.33-3.34V, 3.35-3.36V; Internal resistance < 60m Ω; The poor 3m Ω of for example internal resistance, as: 37-39m Ω, 40-42m Ω;
Going here and there 8 also according to 36V12Ah(18650-1500mAh-3.2V 12) 12*8=96 props up that battery combo requires that voltage difference, internal resistance are poor, capacity difference is all in same shelves scope; 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.
Technological parameter of the present invention arranges reasonable standard, has effectively saved production cost and the energy; Combo uniformity, cycle performance and security performance that the method is easy to operate, improved battery pack, be suitable for batch production, not only ensured product quality requirement, and provide foundation to cell process test.
Embodiment recited above is described the preferred embodiment of the present invention; not design of the present invention and protection domain are limited; do not departing under the prerequisite of design concept of the present invention; various modification and improvement that in this area, common engineers and technicians make technical scheme of the present invention, all should fall into protection scope of the present invention.
Claims (2)
1. the partial volume of a cylindrical lithium battery screening method for group matching, 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) self discharge voltage screening, indicates the undesirable voltage undercarriage that carries out separately;
(3) then self discharge capacity screening, constant-current discharge, electric current 0.5C, is discharged to blanking voltage; Battery capacity in this work step after constant-current discharge should be greater than 96% of sign lowest capacity section, and the undesirable undercarriage that carries out is indicated separately;
(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, is discharged to blanking voltage and shelves; Constant-current constant-voltage charging, electric current 0.5C, charges to half electricity condition; Require qualified battery capacity to carry out segmentation sign according to capacity combo, and carry out lay-down location reason.
2. the partial volume of a kind of cylindrical lithium battery according to claim 1 screening method for group matching, it is characterized in that: by meet combo capacity required section and shelve complete battery by internal resistance test device device carry out voltage section on request, internal resistance section is screened and is indicated, and completes the partial volume screening combo of 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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| 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 CN103894350B (en) | 2016-08-24 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624524A (en) * | 2014-12-26 | 2015-05-20 | 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 |
| CN105911477A (en) * | 2016-04-14 | 2016-08-31 | 合肥国轩高科动力能源有限公司 | Screening method of self discharging of power lithium ion battery |
| 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 |
| CN109786874A (en) * | 2018-12-26 | 2019-05-21 | 江苏春兰清洁能源研究院有限公司 | A kind of partial volume method of lithium ion battery |
| CN110911757A (en) * | 2019-10-25 | 2020-03-24 | 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 |
| CN113441424A (en) * | 2021-06-17 | 2021-09-28 | 山东省智能光电新能源研究院 | Group matching method of lithium iron phosphate lithium battery |
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| CN110911757A (en) * | 2019-10-25 | 2020-03-24 | 合肥国轩高科动力能源有限公司 | Safe capacity grading method for ternary lithium 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 |
| CN113441424A (en) * | 2021-06-17 | 2021-09-28 | 山东省智能光电新能源研究院 | Group matching method of lithium iron phosphate lithium battery |
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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. |