CN110867557A - Lithium ion battery two-dimensional code tracing method - Google Patents
Lithium ion battery two-dimensional code tracing method Download PDFInfo
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- CN110867557A CN110867557A CN201810907215.XA CN201810907215A CN110867557A CN 110867557 A CN110867557 A CN 110867557A CN 201810907215 A CN201810907215 A CN 201810907215A CN 110867557 A CN110867557 A CN 110867557A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a lithium ion battery two-dimension code tracing method, which comprises the following steps: s1, weighing and carving the two-dimensional code, and establishing code battery information collection; s2, weighing the primary injection reading code, and collecting the battery weight and the primary injection amount information; s3, picking out the low-liquid battery and supplementing liquid from the low-liquid battery; s4, pre-charging, secondary liquid injection, washing, measuring voltage, reading codes and weighing, and recording the weight information of the battery; s5, replenishing the low-liquid battery, and pre-charging the low-voltage battery core into a cabinet; s6, weighing for the second time S7, carrying out primary aging, detecting the capacity of the upper cabinet, carrying out voltage measurement on the battery, collecting the voltage of the lower cabinet, recording the voltage as OCV1, and after the measurement is finished; s8, further carrying out secondary aging; and S9, measuring the voltage by using the automatic voltage measuring internal resistance code reader, and collecting the final voltage. The liquid injection amount of the battery can be reduced by 0.1g as a whole, so that the cost is saved; the actual aging of each battery in workshop production can be monitored, and the quality of products is effectively guaranteed.
Description
Technical Field
The invention relates to a lithium ion battery production process, in particular to a lithium ion battery two-dimensional code tracing method.
Background
Because the previous field process does not introduce a two-dimensional code tracing process, the following defects exist:
①, battery core grading is carried out by adopting a layering method, the first-grade liquid injection weighing is carried out according to the grade of 0.2g, mixed grade, electrolyte deviation +/-0.2 g and unweighted secondary liquid injection exist in the process, 0.8-1.0% of less liquid batteries flow to customers, and the processing capability is low.
②, the OCV (open circuit voltage) cannot be applied to the battery cell to follow the voltage drop K value and the internal resistance change point to point;
③, the problem cell cannot be traced back to detailed information;
④, the workshop process aging cannot be effectively controlled.
Disclosure of Invention
The invention aims to provide a lithium ion battery two-dimensional code tracing method aiming at the problems.
The technical scheme adopted by the invention is as follows:
a lithium ion battery two-dimension code tracing method comprises the following steps:
s1, carrying out online assembly, weighing and carving the two-dimensional code, and establishing code battery model, production time, production machine, production quantity and battery dry weight information collection;
s2, transferring the battery to a liquid injection workshop for baking and injecting liquid for one time, after the liquid injection for one time is finished, performing code reading and weighing for one time of liquid injection, and collecting weight information and liquid injection amount information of the battery after one time of liquid injection;
s3, picking out the low-liquid battery and supplementing liquid from the low-liquid battery;
s4, after primary weighing is completed, pre-charging, secondary liquid injection and washing are further carried out, after washing is completed, voltage measurement and code reading weighing are further carried out, at the moment, initial voltage and internal resistance are built for the battery, a low-voltage battery cell is picked out, then battery weight information is recorded, secondary liquid injection quantity and total battery liquid injection quantity are automatically calculated through a read battery information computer, and meanwhile a low-liquid battery cell is picked out;
s5, ①, picking out the low-liquid battery, then intensively pulling out the steel ball to replenish liquid, ②, picking out the low-voltage battery core, then intensively pre-charging the battery;
s6, ①, after the liquid supplement is finished, steel ball sealing is carried out in a centralized mode, normal flow is transferred to secondary weighing, ②, after the pre-charging is finished, normal flow is transferred to secondary weighing;
s7, after secondary weighing is completed, carrying out primary aging and detection on the capacity of the upper cabinet, after the lower cabinet is taken out, carrying out voltage measurement on the battery by using an automatic voltage measurement internal resistance code reading sorting machine, collecting the voltage of the lower cabinet, recording the voltage as OCV1, and after the measurement is finished;
s8, further carrying out secondary aging and warehousing;
and S9, transferring to a package, measuring the voltage by using an automatic voltage measuring and internal resistance code reading machine, collecting the final voltage, recording the final voltage as OCV2, and automatically calculating the k value of the battery cell by using a computer at the moment. This process completes a complete traceability system.
The invention has the beneficial effects that: after the two-dimension code tracing process is implemented:
①, the reliability of the battery is improved, the outflow of a less-liquid battery is reduced, and the outflow risk of a low-voltage battery core is reduced;
② point-to-point electrolyte injection is introduced, the electrolyte injection amount of the battery can be reduced by 0.1g (the residual amount of the original electrolyte is 0.2 g) as a whole, and the cost is saved;
the thickness defect rate of ③ G \ V series detection is reduced to 0.2 percent by 0.43 percent;
④ can monitor the actual time of each battery in workshop production, and effectively ensure the quality of product.
Detailed Description
Example (b):
a lithium ion battery two-dimension code tracing method comprises the following steps:
s1, carrying out online assembly, weighing and carving the two-dimensional code, and establishing code battery model, production time, production machine, production quantity and battery dry weight information collection;
s2, transferring the battery to a liquid injection workshop for baking and injecting liquid for one time, after the liquid injection for one time is finished, performing code reading and weighing for one time of liquid injection, and collecting weight information and liquid injection amount information of the battery after one time of liquid injection;
s3, picking out the low-liquid battery and supplementing liquid from the low-liquid battery;
s4, after primary weighing is completed, pre-charging, secondary liquid injection and washing are further carried out, after washing is completed, voltage measurement and code reading weighing are further carried out, at the moment, initial voltage and internal resistance are built for the battery, a low-voltage battery cell is picked out, then battery weight information is recorded, secondary liquid injection quantity and total battery liquid injection quantity are automatically calculated through a read battery information computer, and meanwhile a low-liquid battery cell is picked out;
s5, ①, picking out the low-liquid battery, then intensively pulling out the steel ball to replenish liquid, ②, picking out the low-voltage battery core, then intensively pre-charging the battery;
s6, ①, after the liquid supplement is finished, steel ball sealing is carried out in a centralized mode, normal flow is transferred to secondary weighing, ②, after the pre-charging is finished, normal flow is transferred to secondary weighing;
s7, after secondary weighing is completed, carrying out primary aging and detection on the capacity of the upper cabinet, after the lower cabinet is taken out, carrying out voltage measurement on the battery by using an automatic voltage measurement internal resistance code reading sorting machine, collecting the voltage of the lower cabinet, recording the voltage as OCV1, and after the measurement is finished;
s8, further carrying out secondary aging and warehousing;
and S9, transferring to a package, measuring the voltage by using an automatic voltage measuring and internal resistance code reading machine, collecting the final voltage, recording the final voltage as OCV2, and automatically calculating the k value of the battery cell by using a computer at the moment. This process completes a complete traceability system. OCV is herein the opencircuit voltage.
Claims (1)
1. A lithium ion battery two-dimension code tracing method is characterized by comprising the following steps: the tracing method comprises the following steps:
s1, carrying out online assembly, weighing and carving the two-dimensional code, and establishing code battery model, production time, production machine, production quantity and battery dry weight information collection;
s2, transferring the battery to a liquid injection workshop for baking and injecting liquid for one time, after the liquid injection for one time is finished, performing code reading and weighing for one time of liquid injection, and collecting weight information and liquid injection amount information of the battery after one time of liquid injection;
s3, picking out the low-liquid battery and supplementing liquid from the low-liquid battery;
s4, after primary weighing is completed, pre-charging, secondary liquid injection and washing are further carried out, after washing is completed, voltage measurement and code reading weighing are further carried out, at the moment, initial voltage and internal resistance are built for the battery, a low-voltage battery cell is picked out, then battery weight information is recorded, secondary liquid injection quantity and total battery liquid injection quantity are automatically calculated through a read battery information computer, and meanwhile a low-liquid battery cell is picked out;
s5, ①, picking out the low-liquid battery, then intensively pulling out the steel ball to replenish liquid, ②, picking out the low-voltage battery core, then intensively pre-charging the battery;
s6, ①, after the liquid supplement is finished, steel ball sealing is carried out in a centralized mode, normal flow is transferred to secondary weighing, ②, after the pre-charging is finished, normal flow is transferred to secondary weighing;
s7, after secondary weighing is completed, carrying out primary aging and detection on the capacity of the upper cabinet, after the lower cabinet is taken out, carrying out voltage measurement on the battery by using an automatic voltage measurement internal resistance code reading sorting machine, collecting the voltage of the lower cabinet, recording the voltage as OCV1, and after the measurement is finished;
s8, further carrying out secondary aging and warehousing;
and S9, packaging, measuring the voltage by using an automatic voltage measuring and internal resistance code reading machine, collecting the final voltage, recording the final voltage as OCV2, automatically calculating the k value of the battery cell by using a computer at the moment, and finishing a complete tracing system in the process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810907215.XA CN110867557A (en) | 2018-08-10 | 2018-08-10 | Lithium ion battery two-dimensional code tracing method |
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| CN201810907215.XA CN110867557A (en) | 2018-08-10 | 2018-08-10 | Lithium ion battery two-dimensional code tracing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112669048A (en) * | 2020-12-24 | 2021-04-16 | 合肥国轩高科动力能源有限公司 | Battery data tracing system of cylindrical battery liquid filling machine |
| CN117766956A (en) * | 2024-02-22 | 2024-03-26 | 宁德时代新能源科技股份有限公司 | Liquid injection system and liquid injection method |
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| CN102637902A (en) * | 2011-02-12 | 2012-08-15 | 有量科技股份有限公司 | Safe assembling method of lithium battery |
| CN102651486A (en) * | 2011-02-25 | 2012-08-29 | 张智斌 | Lithium ion battery redox couple additive and lithium ion battery electrolyte |
| CN103658069A (en) * | 2012-09-26 | 2014-03-26 | 中山天贸电池有限公司 | Lithium ion secondary battery screening method |
| CN102945943A (en) * | 2012-12-05 | 2013-02-27 | 淄博国利新电源科技有限公司 | Linear liquid injection machine for capacitance battery and liquid injection method thereof |
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| CN112669048A (en) * | 2020-12-24 | 2021-04-16 | 合肥国轩高科动力能源有限公司 | Battery data tracing system of cylindrical battery liquid filling machine |
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