CN101908647A - Negative pressure formation method of lithium ion battery and battery thereof - Google Patents
Negative pressure formation method of lithium ion battery and battery thereof Download PDFInfo
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- CN101908647A CN101908647A CN2010102265526A CN201010226552A CN101908647A CN 101908647 A CN101908647 A CN 101908647A CN 2010102265526 A CN2010102265526 A CN 2010102265526A CN 201010226552 A CN201010226552 A CN 201010226552A CN 101908647 A CN101908647 A CN 101908647A
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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
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- Y02E60/10—Energy storage using batteries
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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
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Abstract
The invention relates to a negative pressure formation method of a lithium ion battery and the battery thereof. The negative pressure formation method comprises the following steps: sticking a hydrophobic permeable membrane on a liquid filling hole of the battery, adopting the negative pressure formation technology for carrying out formation on the battery, controlling the battery internal pressure in the range of vacuum degree of minus 0.01MPa-minus 0.1MPa, charging in the current range of 0.01C-1.5C, and carrying out the formation through the time control of the charging volume of the lithium ion battery. The battery formed by the method has high capacity playing of active substances, small internal resistance, small probability of shell bulging, long cycle life and long shelf life and is not affected by environmental humidity. Simultaneously, the method has the advantages of short formation time, high utilization rate of equipment, small energy consumption and small electrolyte loss, and is the high-efficient formation method which is conductive to environmental protection and suitable for mass production of the lithium ion batteries.
Description
Technical field:
The present invention relates to a kind of chemical synthesizing method and application of battery, especially a kind of novel negative pressure formation method and battery thereof that is applicable to lithium ion battery.
Background technology:
Modern electronic product extensive use in daily life makes market heighten to the demand of lithium ion battery, has expedited the emergence of numerous lithium ion battery factory.But be prone at present quality problems such as bulging shell, battery capacity discreteness are bigger than normal, battery appearance poor in the commercial process of lithium ion battery.A major reason that produces the problems referred to above is, changes into first to generate that the charging process of phase film (SEI) produces the negative pole polarization phenomena in the middle of the solid electrolyte, and then causes solvent generation electrochemical reduction and produce gas.The existence of gas will inevitably cause that excessive, the battery outward appearance of bulging, the electrolyte of battery are corroded, capacity is on the low side.For fear of the electrode generation gas that polarizes rapidly, existing production technology all adopts following process: needing behind the battery liquid-filling staticly needs after shelving 12～16 hours after-openings and changing into, change into static shelving to need the static partial volume after 6～7 days of shelving after sealing, seal after 24 hours.Generally speaking, only this formation process just needs 36～40 hours.Obviously, the existence of these operations has prolonged making the time of battery greatly, and the cycle of making has increased the start power consumption time of equipment generally about 12 days simultaneously, has caused the storage space demand in the battery transfer process.If rigid shortening changes into the time, easily cause problems such as capacity of lithium ion battery is on the low side, drum shell.As seen at present to produce the time of shelving of taking be to cause long basic reason of battery processing procedure time in order to solve gas, form fail in the industry always fine solution problem.Simultaneously, there are the excessive of electrolyte and volatilization in the opening formation process, cause the deterioration of corrosion of battery outward appearance and workshop condition.In order to reduce moisture for the lithium ion battery Effect on Performance, the opening formation process generally needs to carry out in water-less environment, and large enterprise generally addresses this problem by setting up drying shed, often causes the increase of fixed investment.Therefore how can on the basis that guarantees battery performance, reduce investment in fixed assets effectively, shorten the formation process required time, reducing the loss of electrolyte, is very important for improving usage ratio of equipment, reducing energy consumption, reduce production cost of cells.
Summary of the invention:
The objective of the invention is to overcome the deficiency of existing opening chemical synthesis technology, a kind of new compound method for lithium ion battery and battery thereof are provided.It is little that this method has investment, the advantage that the formation process time is short, formation efficiency is high.Use this chemical synthesizing method also help to improve lithium ion battery chemical property, improve the battery outward appearance, and can improve operational environment between liquid-filling cart.
Technical scheme of the present invention is summarized as follows:
Stick the hydrophobic type permeable membrane on the liquid injection hole of battery, described permeable membrane can be polytetrafluoroethylene, Kynoar class, polypropylene screen of the organic electrolyte of anti-lithium ion battery the arbitrarily etc.
Adopt the negative pressure forming technology that battery is changed into, the control inner pressure of battery-0.01MPa～-vacuum ranges of 0.1MPa in, in the current range of 0.01C～1.5C, charge, and change into by the charge volume of time control lithium ion battery.The change into time of battery under negative pressure state is 1 hour～4 hours, can directly put into air when finishing or dry gas returns to normal pressure changing into.
Described battery can the random time in 12 hours directly change into after fluid injection, can seal the direct partial volume of random time in back 7 days in the random time direct sealing that changes in back 24 hours.
The negative pressure formation method of lithium rechargeable battery of the present invention may further comprise the steps:
1. battery is installed in the conventional vacuum casing is changed into terminal, and partly link to each other with control panel the control line outlet box is external, be transformed into negative-pressure vacuum and change into case (cabinet).
2. the battery case of the battery of conventional method manufacturing being packed into, pastes the hydrophobic type permeable membrane at baking back fluid injection, immediately goes up negative-pressure vacuum and changes into cabinet and change into; Elder generation's normal pressure charging changes into certain hour (0.05C～0.1C changed into 45～60 minutes), carry out the negative pressure charging then and change into, in the negative pressure formation process control vacuum degree-0.01MPa～-0.1MPa, charging current is in the scope of 0.01C～1.5C.The design fluid injection finishes and finishes required time in 2～5 hours scopes to changing into;
3. changing into direct bubbling air in end back or dry gas makes the cabinet internal pressure return to normal pressure.
4. changing into afterwards, battery seals immediately and carries out partial volume according to current technology.
The present invention obtains lithium rechargeable battery according to above-mentioned negative pressure formation method.
The pad pasting that the present invention uses is compared with existing chemical synthesis technology with the negative pressure forming technology and is had the following advantages and good effect:
1. hydrophobic type permeable membrane and negative pressure change into the influence that can weaken moisture in the environment effectively, can eliminate to change into the influence degree of environment to battery performance, outward appearance, make this formation process to carry out in high humidity environment;
2. adopt negative pressure to change into and also can make the abundant wetting electrode of electrolyte, thereby weaken polarization phenomena effectively, and then the existence of side reaction gas in the minimizing battery, finally can improve the eliminating speed and the degree of battery inflatable, side reaction gas, help improving formation efficiency, improve battery performance;
3. adopt earlier normal pressure 0.05C～0.1C to change into before negative pressure changes into 45～60 minutes, carry out the loss that the combination mode of changing into that negative pressure changes into can effectively reduce electrolyte again.
4. do not need painstakingly to feed dry gas recovery cabinet internal pressure to normal pressure after changing into end.
Therefore use of the present invention can make battery not need changing into, seal, leaving standstill for a long time before the operation such as partial volume, can reduce simultaneously the excessive of electrolyte and volatilization, slacken the influence of moisture, therefore long, start energy consumption of the time of making in the conventional batteries formation process can alleviated effectively is big, required to leave standstill relevant issues such as the place is many, have and improve utilization rate of equipment and installations, reduction start energy consumption, the advantage that changes into the shopwork environment, reduces the electrolyte loss of improving, meet the target of national energy-saving and emission-reduction, help environmental protection.Eliminating of the shortening of battery processing procedure time, drying shed finally can effectively reduce fund taking in processing procedure, accelerates the turnover rate of fund, helps enterprise to obtain better economic benefit.
Embodiment
The negative pressure chemical synthesis technology of lithium rechargeable battery of the present invention may further comprise the steps:
With the battery of the conventional method manufacturing battery case of packing into, baking back fluid injection, paste the hydrophobic type permeable membrane, immediately go up negative-pressure vacuum and change into cabinet and change into; Elder generation's normal pressure charging changes into certain hour, carry out the negative pressure charging then and change into, in the negative pressure formation process control vacuum degree-below the 0.1MPa, charging current is below 1.5C.Fluid injection finishes and finishes required time in 5 hours to changing into.Changing into direct bubbling air in end back or dry gas makes the cabinet internal pressure return to normal pressure.Changing into afterwards, battery seals immediately and carries out partial volume according to current technology.
This negative pressure formation process operation is as follows:
1. the liquid injection hole with electric core after the fluid injection seals with unidirectional cut film;
2. open negative pressure and change into cabinet, electric core is placed on the anchor clamps, then negative pressure is changed into cabinet and close;
3. be provided with and change into electric current, time parameter on the cabinet control panel, carry out normal pressure earlier and change into, determine that divided by corresponding charging current normal pressure changes into time t according to 10% of design capacity
1
4. start vacuum system, under corresponding vacuum degree, continuing to change into, determine that divided by corresponding charging current negative pressure changes into time t according to 60% of design capacity
2This moment, total charge capacity was no more than 70% of battery design capacity;
5. will change into the cabinet internal pressure and directly return to normal pressure, and take out battery and directly seal partial volume.
Below in conjunction with specific embodiment to step among the present invention 4. 5. time and vacuum degree be described in further detail.
Embodiment 1
With 0.05C current charges 120 minutes, stop charging after 180 minutes with the 0.2C charging then under the negative pressure of-0.05MPa under normal pressure, this moment, charge capacity accounted for 70% of battery design capacity.
Embodiment 2
With 0.05C current charges 120 minutes, stop charging after 120 minutes with the 0.3C charging then under the negative pressure of-0.05MPa under normal pressure, this moment, charge capacity accounted for 70% of battery design capacity.
Embodiment 3
With 0.1C current charges 60 minutes, stop charging after 120 minutes with the 0.3C charging then under the pressure of-0.05MPa under normal pressure, this moment, charge capacity accounted for 70% of battery design capacity.
Embodiment 4
With 0.1C current charges 60 minutes, stop charging after 60 minutes with the 0.6C charging then under the negative pressure of-0.05MPa under normal pressure, this moment, charge capacity accounted for 70% of battery design capacity.
Embodiment 5
Stop charging after 120 minutes with the 0.05C current charges under the negative pressure of-0.07MPa, this moment, charge capacity accounted for 10% of battery design capacity.
Embodiment 6:
With 0.05C current charges 30 minutes, stop charging after 30 minutes with the 0.3C charging then under the negative pressure of-0.06MPa under the negative pressure of-0.07MPa, this moment, charge capacity accounted for 25% of battery design capacity.
Embodiment 7:
With 0.1C current charges 60 minutes, stop charging after 60 minutes with the 0.3C charging then under the negative pressure of-0.06MPa under the negative pressure of-0.06MPa, this moment, charge capacity accounted for 40% of battery design capacity.
The testing result such as the table 1 of the foregoing description:
Table 1 is annotated:
1. voltage retention refers to the maintenance situation of cell voltage in the cyclic process;
2. the thickness rebound amount refers to the increase percentage of cell thickness in the cyclic process;
3. electric charge keeps referring to battery cell voltage is over time between the storage life;
4. utilization rate of equipment and installations refers to according to this embodiment, and one changes into the cell number that cabinet can be finished at most in a day.
5. the battery outward appearance refers to the clean-up performance of battery surface, requires no electrolyte mottling for well.
Above-mentioned experimental result shows, in the certain negative pressure scope, adopts and selects permeability film and negative pressure forming technology can realize that big electric current changes into, thereby can shorten the time of changing into effectively.The battery that changes into of this method simultaneously, the performance of active material capacity is high, internal resistance is little, can improve battery the capacity performance, prolong cycle life, weaken the bulging shell phenomenon of battery in cyclic process, the shelf-lifeing of raising battery.This chemical synthesizing method also reduces the excessive loss of electrolyte, helps the corresponding improvement of operational environment between battery outward appearance and liquid-filling cart.This production technology is not subjected to the influence of ambient humidity, and can reduce the postprocessing working procedures after battery is made, and has effectively improved the grade of battery.The realization of this technology helps to realize the requirement of high-quality battery.
Claims (7)
1. the negative pressure formation method of a lithium ion battery, it is characterized in that it is to stick the hydrophobic type permeable membrane on the liquid injection hole of battery, adopt the negative pressure forming technology that battery is changed into, the control inner pressure of battery-0.01MPa～-vacuum ranges of 0.1MPa in, in the current range of 0.01C～1.5C, charge, and change into by the charge volume of time control lithium ion battery.
2. chemical synthesizing method according to claim 1 is characterized in that described permeable membrane is polytetrafluoroethylene, Kynoar class, polypropylene screen.
3. chemical synthesizing method according to claim 1 is characterized in that the described negative pressure time of changing into is 1 hour～4 hours, and charging current is 0.01C～1.5C, can directly put into air when finishing or dry gas returns to normal pressure changing into.
4. chemical synthesizing method according to claim 1 is characterized in that described battery can the random time in 12 hours directly change into after fluid injection, in the random time direct sealing that changes in back 24 hours, seal the direct partial volume of random time in back 7 days.
5. the negative pressure formation method of a lithium rechargeable battery is characterized in that may further comprise the steps:
1) battery is installed and changes into terminal in the conventional vacuum casing, and partly link to each other with control panel the control line outlet box is external, be transformed into negative-pressure vacuum and change into case;
2) battery of conventional method manufacturing is packed into battery case, pastes the hydrophobic type permeable membrane at baking back fluid injection, and immediately Over-The-Counter changes into; The charging of first normal pressure changed into 45～60 minutes in 0.01C～1.5C current range, carry out the negative pressure charging then and change into, in the negative pressure formation process control vacuum degree-0.01MPa～-0.1MPa; The design fluid injection finishes and finishes blanking time in 2～5 hours scopes to changing into;
3) changing into direct bubbling air in end back or dry gas makes the cabinet internal pressure return to normal pressure;
4) changing into afterwards, battery seals immediately and carries out partial volume according to current technology.
6. chemical synthesizing method according to claim 5 is characterized in that described battery random time in 12 hours after fluid injection directly changes into, and in the random time direct sealing that changes in back 24 hours, seals the direct partial volume of random time in back 7 days.
7. the lithium rechargeable battery that obtains of any described negative pressure formation method of claim 1-6.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094621A (en) * | 2013-01-30 | 2013-05-08 | 浙江超威创元实业有限公司 | Lithium ion battery formation method and device |
| CN103165941A (en) * | 2011-12-19 | 2013-06-19 | 东莞市振华新能源科技有限公司 | Formation method of lithium battery |
| CN103531860A (en) * | 2013-09-28 | 2014-01-22 | 山东润峰集团新能源科技有限公司 | Lithium ion battery external formation method |
| CN103682458A (en) * | 2013-12-11 | 2014-03-26 | 高平唐一新能源科技有限公司 | Method for solving residue of internal gas and electrolyte in formation of hard-shell lithium battery |
| CN104037464A (en) * | 2014-06-19 | 2014-09-10 | 合肥国轩高科动力能源股份公司 | Formation method of lithium ion battery |
| CN107425198A (en) * | 2017-07-28 | 2017-12-01 | 深圳市博澳能源技术开发有限公司 | The polymer Li-ion battery and its manufacture method of monomer vast capacity |
| CN108258347A (en) * | 2017-12-28 | 2018-07-06 | 国联汽车动力电池研究院有限责任公司 | A kind of chemical synthesizing method of silicium cathode soft bag lithium ionic cell |
| CN109411826A (en) * | 2017-08-16 | 2019-03-01 | 微宏动力系统（湖州）有限公司 | Formation of Li-ion batteries technique |
| CN112290104A (en) * | 2020-10-20 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | High-temperature negative-pressure formation method of lithium ion battery |
| CN114020060A (en) * | 2022-01-10 | 2022-02-08 | 深圳市铂纳特斯自动化科技有限公司 | Negative pressure vacuum control system for battery formation equipment and automatic control method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165941A (en) * | 2011-12-19 | 2013-06-19 | 东莞市振华新能源科技有限公司 | Formation method of lithium battery |
| CN103094621A (en) * | 2013-01-30 | 2013-05-08 | 浙江超威创元实业有限公司 | Lithium ion battery formation method and device |
| CN103531860A (en) * | 2013-09-28 | 2014-01-22 | 山东润峰集团新能源科技有限公司 | Lithium ion battery external formation method |
| CN103531860B (en) * | 2013-09-28 | 2015-11-04 | 山东润峰集团新能源科技有限公司 | Lithium ion battery external formation method |
| CN103682458A (en) * | 2013-12-11 | 2014-03-26 | 高平唐一新能源科技有限公司 | Method for solving residue of internal gas and electrolyte in formation of hard-shell lithium battery |
| CN103682458B (en) * | 2013-12-11 | 2016-01-20 | 高平唐一新能源科技有限公司 | A kind of internal gas and electrolyte residual method when solving duricrust formation of Li-ion batteries |
| CN104037464A (en) * | 2014-06-19 | 2014-09-10 | 合肥国轩高科动力能源股份公司 | Formation method of lithium ion battery |
| CN107425198B (en) * | 2017-07-28 | 2020-01-10 | 海口博澳国兴新能源科技有限公司 | Monomer ultra-high-capacity polymer lithium ion battery and manufacturing method thereof |
| CN107425198A (en) * | 2017-07-28 | 2017-12-01 | 深圳市博澳能源技术开发有限公司 | The polymer Li-ion battery and its manufacture method of monomer vast capacity |
| CN109411826A (en) * | 2017-08-16 | 2019-03-01 | 微宏动力系统（湖州）有限公司 | Formation of Li-ion batteries technique |
| CN108258347A (en) * | 2017-12-28 | 2018-07-06 | 国联汽车动力电池研究院有限责任公司 | A kind of chemical synthesizing method of silicium cathode soft bag lithium ionic cell |
| CN108258347B (en) * | 2017-12-28 | 2020-04-07 | 国联汽车动力电池研究院有限责任公司 | Formation method of silicon negative electrode soft package lithium ion battery |
| CN112290104A (en) * | 2020-10-20 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | High-temperature negative-pressure formation method of lithium ion battery |
| CN112290104B (en) * | 2020-10-20 | 2021-11-05 | 合肥国轩高科动力能源有限公司 | High-temperature negative-pressure formation method of lithium ion battery |
| CN114020060A (en) * | 2022-01-10 | 2022-02-08 | 深圳市铂纳特斯自动化科技有限公司 | Negative pressure vacuum control system for battery formation equipment and automatic control method thereof |
| CN114020060B (en) * | 2022-01-10 | 2022-03-25 | 深圳市铂纳特斯自动化科技有限公司 | Negative pressure vacuum control system for battery formation equipment and automatic control method thereof |
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Application publication date: 20101208 |