CN107464956A - A kind of new process for making of lithium ion battery - Google Patents

A kind of new process for making of lithium ion battery Download PDF

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Publication number
CN107464956A
CN107464956A CN201710709214.XA CN201710709214A CN107464956A CN 107464956 A CN107464956 A CN 107464956A CN 201710709214 A CN201710709214 A CN 201710709214A CN 107464956 A CN107464956 A CN 107464956A
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CN
China
Prior art keywords
battery
lithium ion
syringe needle
making
fluid injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710709214.XA
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Chinese (zh)
Inventor
李胜前
朱冠华
符泽卫
谭春华
刘恒宇
万伟超
罗云凤
吴明娇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yunnan Tin Group (holding) Co Ltd
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Yunnan Tin Group (holding) Co Ltd
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Priority to CN201710709214.XA priority Critical patent/CN107464956A/en
Publication of CN107464956A publication Critical patent/CN107464956A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

A kind of new process for making of lithium ion battery is related to the making of square lithium ion power battery and energy-storage battery, more particularly to activation chemical conversion high temperature ageing secondary injection is stood after lithium ion fluid injection and is liquefied as sealing process.The present invention includes:Step is stood after fluid injection:After battery liquid-filling, liquid injection hole is blocked using special plug, then stored;It is melted into step:The plug is pierced through using syringe needle, the other end of the syringe needle is connected to the pipeline on formation device, enters line precharge or discharge and recharge in vacuumizing to above-described battery core;Aging Step:By way of syringe needle is pierced through plug, gas caused by the inside battery is discharged using the mode vacuumized;Secondary fluid injection step:Fluid infusion is carried out by way of needle pierces plug;Secondary chemical conversion step:Plug is pierced through using syringe needle, the other end of the syringe needle is connected to the pipeline on formation device, and above-described battery core is charged in vacuum.Sealing step:The plug of sealing is pierced through, in the case where negative pressure extrudes, plug is compressed, then carries out laser seal.

Description

A kind of new process for making of lithium ion battery
Technical field
The present invention relates to rectangular lithium ion dynamic field and rectangular lithium ion energy storage field, more particularly to lithium ion Activation-chemical conversion-high temperature ageing-secondary fluid injection-chemical conversion-sealing process is stood after fluid injection.
Background technology
Lithium ion battery has the characteristics that high voltage, height ratio capacity, high-specific-power and long-life property, has become important New energy, be widely used in electrokinetic cell and energy-storage battery field, but because battery easily absorbs water in manufacturing process, How to prevent from absorbing water as far as possible under certain damp condition, and reduce transformation and the humid control cost of environment as far as possible, Through the bottleneck as many production firms;The uniformity of product how is lifted simultaneously, turns into the problem of whole industry joint research.
At present in industry, all big enterprises are respectively adopted that sealing is ordered or gummed paper seals to liquid injection hole, so as to ensure battery Inside is not influenceed by external environment condition moisture, in formation process, liquid injection hole is closed or unties and is melted into, in this process In, it is necessary to which putting into substantial amounts of cost carries out environmental regulatory control, if sealed using gummed paper, gummed paper easily comes off, and due to sealing Property it is bad, it is easy to cause moisture to enter inside battery, such as ordered using sealing, can cause it is internal produce substantial amounts of gas can not and When discharge, be stored in inside battery, make case swells or battery is had an impact.
At present in industry, it is necessary to sealing ring be pulled out or gummed paper is torn before being sealed, seal gasket is filled in, then By the electrolyte wash clean on surface, then dried, prevent from due to there is electrolyte etc. on housing drawing in laser beam welding The fried fire of laser seal is played, or there is bad order caused by electrolytic corrosion on aluminum hull surface, this needs to waste substantial amounts of manpower, thing Power, equipment and electric resources.
The content of the invention
For above-mentioned the deficiencies in the prior art, the present invention passes through:
Stand activation-chemical conversion-high temperature ageing-secondary fluid injection-chemical conversion-sealing work after 1. a kind of fluid injection of aluminum hull power battery core is provided Skill, while reducing ambient humidity requirement to reach, effectively vacuum will be kept in battery core or be filled with certain protective gas, will Moisture in battery core carries out effecting reaction, and the entrance for suppressing moisture is reacted again.
2. being vacuumized by syringe needle, it can prevent electrolyte from corroding to housing and cover plate, so as to avoid laser Need to clean battery before sealing.
3. by constantly vacuumizing and being filled with protective gas, it can guarantee that inside battery is free from the influence of the external environment, The control of external environment condition can be reduced, so as to reduce the cost input of ambient humidity control aspect.
4. in the state of negative pressure and extruding, sealed, the uniformity of thickness can be ensured.
To achieve these goals, technical scheme is as follows:
Step is stood after fluid injection:Lithium ion is sealed liquid injection hole using special plug after fluid injection, prevents moisture from entering battery core Inside, then battery is put into material box.It is melted into step:After being pressed from both sides on battery, using certain discharge and recharge step to battery Enter line precharge, in the process, vacuumize process is carried out to battery by way of needle pierces battery liquid-filling stopple, and When effectively drain gas caused by inside.After chemical conversion terminates, a certain amount of protective gas is filled with to the battery, in case battery exists After pulling up syringe needle, outside moisture is caused to enter due to negative pressure.Aging Step:For battery after chemical conversion, battery is filled with special gas, Syringe needle is pulled up, is transferred to aging at certain temperature, in the process battery can also take out very by way of syringe needle Vacancy is managed, in case the moisture in extraneous air enters, meanwhile, by vacuumizing, gas caused by inside can be discharged. Secondary fluid injection step:If the electrolyte content of inside battery can not meet design requirement, by way of syringe needle injection, benefit is played The effect of liquid.Secondary chemical conversion step:After being pressed from both sides on battery, battery is charged using certain charge step, in this process In, vacuumize process is carried out to battery by way of needle pierces battery liquid-filling stopple, constantly drained caused by inside Gas.After chemical conversion terminates, a certain amount of protective gas is filled with to the battery, in case battery is after syringe needle is pulled up, due to negative pressure Outside moisture is caused to enter, this process can carry out the micro-moisture in secondary fluid injection decomposition aerogenesis, while can make after-teeming The electrolyte entered is uniformly immersed in inside battery everywhere again.Negative pressure pressing steps:Completely by battery core by way of negative pressure Interior gas discharge, while extruded, laser welding sealing is carried out again during to certain thickness.Laser seal step:Due to Battery is all vacuumize process in whole process, and internal electrolyte is not transferred on housing and cover plate, thus may be used To save the input of substantial amounts of manpower, equipment and cleaning agent etc., can directly be welded, while in negative pressure and extruding Under state, sealed, the uniformity of thickness can be ensured.
The beneficial effect of the embodiment of the present invention is:Battery, can be by way of negative pressure by battery core in whole process Gas is timely and effectively discharged caused by portion, secondly, the plug made by special material, whether without the plug punctured Son, or the plug punctured by syringe needle, can be transferred through the effect of external force, make inside battery and outside isolation completely, equally, are filled with Certain protective gas, the pressure of pressure >=outside of inside battery is can guarantee that, the moisture in the external world can be avoided to enter in battery Portion, the dependence to external environment can be reduced.
Brief description of the drawings
Fig. 1 is the entire flow schematic diagram of example new type lithium ion battery process for making of the present invention.
Embodiment
With reference to schematic diagram, the embodiment of the present invention is described in detail:
Fig. 1 is refer to, new type lithium ion battery process for making of the embodiment of the present invention includes:
Fluid injection step 10:For lithium ion battery in fluid injection, injection electrolyte gross weight presets ratio.For once Fluid injection step 10, electrolyte gross weight are the predetermined weight that can meet the electrolyte needed for battery core performance, battery core performance Including capacity, circulation and high rate performance etc., the ratio that presets be 70%-100%, the ambient humidity of the step is 1%~ 2%, temperature is 20-25 DEG C.In first example of the invention, the electrolysis liquid energy of injection meets the requirement of battery performance, and battery need not Secondary fluid injection, that is, do not need secondary fluid injection step 71 to arrive secondary these three steps of Aging Step 73, can directly it be born Press pressing steps.In second example of the invention, the electrolyte of injection can not meet battery performance requirements, and battery needs to carry out secondary Fluid injection, that is, need secondary fluid injection step 71 to arrive secondary these three steps of Aging Step 73, then carry out negative pressure pressing steps.
Sealing step 20:After battery injects considerable amount of electrolyte, liquid injection hole is clogged with special plug, then It is put into material box.Ambient humidity is 1%~2%, and temperature is 20-25 DEG C.
Aging step 30:The battery core after sealing is placed on humidity in the environment of 1%-45%, to shelve the time For 10H-48H;Sealed relative to using gummed paper, this technique can be sealed using equipment, while seal after battery by The influence of ambient humidity is smaller, and electrolyte will not corrode to housing.Due to using plug by the inside of battery core and environment Isolation completely, is influenceed less by the humidity factor of external environment condition, and ambient humidity need not be controlled substantially.
It is melted into step 40:It is 1%-45% in humidity, in the environment of temperature is 20 DEG C -60 DEG C, according to the difference of material system, After being pressed from both sides on battery, line precharge can be entered to battery using different discharge and recharge steps, in the process, pass through needle pierces electricity The mode of pond liquid injection hole plug carries out vacuumize process processing, gas caused by inside of timely and effectively draining to battery.Chemical conversion After end, a certain amount of protective gas is filled with to the battery, in case battery causes extraneous water after syringe needle is pulled up, due to negative pressure Divide and enter.Syringe needle is sealed simultaneously, the problem of preventing external environment humidity, cause have moisture in syringe needle and pipeline.Due to this Invention timely and effectively vacuumizes to battery, and the inside of battery core completely cuts off completely with external environment condition, by the wet of external environment condition The influence of degree factor is less, and ambient humidity need not be controlled substantially.
Aging Step 50:In the case where humidity is 10%-45% humidity, aging is carried out at a certain temperature and is shelved, is put It is 0H-168H to put the time.According to the difference of material system, battery can also be taken out by way of syringe needle in the process Application of vacuum, meanwhile, by vacuumizing, gas caused by inside can be discharged.This step of the invention is particular for lithium titanate System battery, the material system can produce substantial amounts of gas in ageing process, timely and effectively discharge gas, Ke Yijia Fast internal aerogenesis and prevent battery drum shell.It is worth noting that, do not need the battery of secondary fluid injection can be with after this process Directly carry out negative pressure to be extruded to shape, then carry out laser seal.Because the present invention timely and effectively vacuumizes to battery, and The inside of battery core completely cuts off completely with external environment condition, influenceed by the humidity factor of external environment condition it is less, substantially need not be to environmental wet Degree is controlled.
Voltage tester step 60:Voltage tester is carried out to the battery after aging, the battery progress of bad voltage is corresponding Processing.
Secondary fluid injection step 71:Because secondary fluid injection is comparable to fill into the process of inadequate electrolyte, this process needs Electrolyte it is less, while plug is not pulled out, can by the way of syringe needle to battery carry out fluid injection.Battery is in humidity 1%~2%, temperature carries out after-teeming liquid under conditions of being 20 DEG C~25 DEG C, total fluid-injecting amount is met technological requirement.
Secondary chemical conversion step 72:In the environment of humidity is 10%-45%, according to the difference of material system, after being pressed from both sides on battery, Using 0.1C~0.2C, the charging interval is that 1H-4H technique is charged, and in the process, passes through needle pierces battery liquid-filling The mode of stopple carries out vacuumize process, gas caused by inside of timely and effectively draining to battery.After chemical conversion terminates, to this Battery is filled with a certain amount of protective gas, in case battery causes outside moisture to enter after syringe needle is pulled up, due to negative pressure, this mistake Journey can carry out the micro-moisture in secondary fluid injection decomposition aerogenesis, while the electrolyte that can enter after-teeming uniformly soaks again Enter to inside battery everywhere.Because the present invention timely and effectively vacuumizes to battery, and the inside of battery core and external environment condition Isolation completely, is influenceed less by the humidity factor of external environment condition, and ambient humidity need not be controlled substantially.
Secondary Aging Step 73:In the case where humidity is 10%-45% humidity, secondary aging is carried out at a certain temperature and is put Put, it is 0H-168H to shelve the time.The mode that again may be by syringe needle in the process carries out vacuumize process to battery, together When, by vacuumizing, gas caused by inside can be discharged.Because the present invention is that battery is entered by way of vacuum Row vacuumize, and battery core inside completely cut off completely with external environment condition, influenceed by the humidity factor of external environment condition it is less, substantially do not need Ambient humidity is controlled.
Negative pressure pressing steps 80:By the hairdo of negative pressure by gas is discharged caused by the inside of battery core while, it is right Battery is extruded, and is made up to after certain thickness and is fixed, plug is pressed down, is again sealed off.So have The uniformity of the needs that can completely arrive at design and thickness beneficial to cell thickness is greatly improved.
Laser seal 90:Liquid injection hole is sealed using laser-beam welding machine.
By the checking repeatedly of the new type lithium ion battery process for making to the embodiment of the present invention, using the technique, It can reach claimed below:
Environmental costs input reduces:Battery after fluid injection with during the entire process of plug seal to laser seal, by overall situation Humid control become environmental regulatory control carried out to single battery core, greatly reduce production cost.
Enhancement of environment:Avoid battery electrolyte after chemical conversion from emerging, fixture and environment are polluted, improve work Environment.
Homogeneity of product improves:In whole process, the mode for vacuumizing or being filled with special gas has been used, can have been made interior The gas in portion is fully moved out, meanwhile, the protective gas being filled with does not react with internal component, plays inhibitory action, improves The uniformity of product;It can carry out thickness sizing under conditions of two kinds of techniques of negative pressure and extruding are carried out simultaneously, be advantageous to thickness The uniformity of degree improves.
Manually, equipment cost reduces:This technique need not be cleaned and dried to the housing before laser seal, can be with Directly sealed, substantial amounts of manpower, material resources and electric power resource can be saved, while will can shorten the production cycle.
Wide adaptation range:The present invention can be not only applied in each laboratory, and it is higher can be equally used in automaticity Factory.
Described above is the embodiment of the present invention, it is noted that for those skilled in the art For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications can also It is considered as protection scope of the present invention.

Claims (9)

1. a kind of new process for making of lithium ion battery, it is characterised in that comprise the following steps:
A. a fluid injection step:Lithium ion battery, according to design and the actual conditions of battery, injects the total of electrolyte in fluid injection Weight presets ratio, presets ratio within 70%~100%;
B. it is melted into step:Negative pressure is carried out to battery or on the premise of being filled with special protection gas, the battery is entered line precharge or Discharge and recharge;
C. two fluid injection steps:When battery liquid-filling recoverable amount deficiency, certain electrolyte is injected by way of syringe needle;
D. secondary sealing:Laser seal is carried out to battery.
2. lithium ion battery process for making as claimed in claim 1, it is characterised in that:Fluid injection and chemical conversion Between also include:Sealing step:After fluid injection, liquid injection hole is clogged with special plug immediately;Aging step:By battery It is placed in material box, under certain environmental conditions, carries out shelving 10H-48H.
3. lithium ion battery process for making as claimed in claim 2, it is characterised in that:The chemical conversion step also includes: Once it is melted into step:According to the difference of material system, using 0.02C~1C, charging interval 0.5H-8H, or take and first charge, Discharge afterwards, the pattern recharged;In the process, gas caused by the inside is passed through into syringe needle using the mode that negative pressure vacuumizes Discharge;Secondary chemical conversion step:According to the difference of material system, using 0.1C~0.2C, charging interval 1H-4H, in this process In, gas caused by the inside is discharged by syringe needle using the mode that negative pressure vacuumizes.
4. lithium ion battery process for making as claimed in claim 1, it is characterised in that:Once chemical conversion and the secondary injection Also include between liquid:Voltage tester step:According to preset voltage value, whether the voltage for the battery core tested after preliminary filling is in scope Within;Aging Step:According to the difference of material system, battery core described above is placed on 0H in certain environment~ 168H。
5. lithium ion battery process for making as claimed in claim 3, it is characterised in that:The secondary fluid injection and sealing Between also include:Negative pressure pressing steps:Inside battery is vacuumized by way of syringe needle, then extruded, works as extruding During to certain thickness, plug is pressed onto to certain position.
6. lithium ion battery process for making as claimed in claim 3, it is characterised in that:Battery recoverable amount can meet to design In the case of it is required that, negative pressure pressing steps and sealing step can be directly carried out after Aging Step, it is not necessary to carry out secondary Fluid injection.
7. lithium ion battery process for making as claimed in claim 4, it is characterised in that:It is complete by way of vacuumizing When gas in battery core is discharged, while is expressed to certain thickness, sealed, being so advantageous to cell thickness can reach completely Uniformity to the needs of design, and thickness is greatly improved.
8. the lithium ion battery process for making as described in claim any one of 1-4, it is characterised in that:By vacuumize with And the mode being fully sealed, battery can be reduced completely after fluid injection step, the dependence to ambient humidity, reduce environmental reconstruction into This, while gas caused by inside battery core can be timely and effectively discharged, lift the uniformity of product.
9. the lithium ion battery process for making as described in claim any one of 1-4, it is characterised in that:Using syringe needle In step, in order to ensure within 10%-45% humidity, syringe needle and pipeline etc. are influenceed by ambient moisture, by syringe needle with And pipeline prevents moisture from entering in pipeline using the mode for inserting silica gel or other sealings.
CN201710709214.XA 2017-08-17 2017-08-17 A kind of new process for making of lithium ion battery Pending CN107464956A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108321436A (en) * 2017-12-26 2018-07-24 合肥国轩高科动力能源有限公司 A kind of cathode uses the lithium ion battery forming and capacity dividing method of silicon-carbon
CN108840008A (en) * 2018-07-31 2018-11-20 深圳市捷创嘉智能物流装备有限公司 A kind of automatic stored logistics system for battery core repository entry
CN108987662A (en) * 2018-06-15 2018-12-11 江西力能新能源科技有限公司 A kind of production technology of novel cylindrical lithium battery
CN109037751A (en) * 2018-08-08 2018-12-18 力信(江苏)能源科技有限责任公司 A kind of method and lithium ion battery for reducing lithium ion battery and welding thickness after PIN
CN109494413A (en) * 2018-11-12 2019-03-19 桑顿新能源科技有限公司 A kind of soft bag lithium ionic cell and preparation method thereof
CN109524614A (en) * 2018-11-14 2019-03-26 湖南安德丰新能源科技有限公司 A kind of secondary electrolyte filling method in lithium battery preparation
CN109935776A (en) * 2019-03-07 2019-06-25 星恒电源股份有限公司 A kind of electrolyte filling method and device of lithium-ion-power cell
CN110176634A (en) * 2019-05-16 2019-08-27 湖北锂诺新能源科技有限公司 A kind of preparation process of low bulk lithium ion battery
CN110797579A (en) * 2019-11-07 2020-02-14 蒋子杰 Formation method of flexible package lithium ion battery with ternary material as anode
CN111883851A (en) * 2020-08-02 2020-11-03 江西安驰新能源科技有限公司 Method for formation to matching of lithium ion batteries

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JP2008091065A (en) * 2006-09-29 2008-04-17 Matsushita Electric Ind Co Ltd Liquid injection method and liquid injection device of lithium secondary battery
CN102290557A (en) * 2011-07-19 2011-12-21 深圳邦凯新能源股份有限公司 Liquid injection process of lithium ion battery cell
CN102637903A (en) * 2012-04-06 2012-08-15 宁德新能源科技有限公司 Formation method of lithium ion battery

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Publication number Priority date Publication date Assignee Title
JP2008091065A (en) * 2006-09-29 2008-04-17 Matsushita Electric Ind Co Ltd Liquid injection method and liquid injection device of lithium secondary battery
CN102290557A (en) * 2011-07-19 2011-12-21 深圳邦凯新能源股份有限公司 Liquid injection process of lithium ion battery cell
CN102637903A (en) * 2012-04-06 2012-08-15 宁德新能源科技有限公司 Formation method of lithium ion battery

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108321436A (en) * 2017-12-26 2018-07-24 合肥国轩高科动力能源有限公司 A kind of cathode uses the lithium ion battery forming and capacity dividing method of silicon-carbon
CN108321436B (en) * 2017-12-26 2021-02-26 合肥国轩高科动力能源有限公司 Lithium ion battery formation and capacity-sharing method adopting silicon carbon as negative electrode
CN108987662A (en) * 2018-06-15 2018-12-11 江西力能新能源科技有限公司 A kind of production technology of novel cylindrical lithium battery
CN108840008A (en) * 2018-07-31 2018-11-20 深圳市捷创嘉智能物流装备有限公司 A kind of automatic stored logistics system for battery core repository entry
CN109037751A (en) * 2018-08-08 2018-12-18 力信(江苏)能源科技有限责任公司 A kind of method and lithium ion battery for reducing lithium ion battery and welding thickness after PIN
CN109494413A (en) * 2018-11-12 2019-03-19 桑顿新能源科技有限公司 A kind of soft bag lithium ionic cell and preparation method thereof
CN109524614A (en) * 2018-11-14 2019-03-26 湖南安德丰新能源科技有限公司 A kind of secondary electrolyte filling method in lithium battery preparation
CN109935776A (en) * 2019-03-07 2019-06-25 星恒电源股份有限公司 A kind of electrolyte filling method and device of lithium-ion-power cell
CN110176634A (en) * 2019-05-16 2019-08-27 湖北锂诺新能源科技有限公司 A kind of preparation process of low bulk lithium ion battery
CN110797579A (en) * 2019-11-07 2020-02-14 蒋子杰 Formation method of flexible package lithium ion battery with ternary material as anode
CN111883851A (en) * 2020-08-02 2020-11-03 江西安驰新能源科技有限公司 Method for formation to matching of lithium ion batteries

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