CN101673848A - Method for manufacturing lithium-ion batteries - Google Patents
Method for manufacturing lithium-ion batteries Download PDFInfo
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- CN101673848A CN101673848A CN200810142195A CN200810142195A CN101673848A CN 101673848 A CN101673848 A CN 101673848A CN 200810142195 A CN200810142195 A CN 200810142195A CN 200810142195 A CN200810142195 A CN 200810142195A CN 101673848 A CN101673848 A CN 101673848A
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- battery
- preliminary filling
- lithium ion
- manufacture method
- precharging
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 238000005429 filling process Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 13
- 230000037452 priming Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 239000007774 positive electrode material Substances 0.000 description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 10
- 238000007796 conventional method Methods 0.000 description 10
- 229910052744 lithium Inorganic materials 0.000 description 10
- 230000014759 maintenance of location Effects 0.000 description 10
- 230000000740 bleeding effect Effects 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 229910017052 cobalt Inorganic materials 0.000 description 7
- 239000010941 cobalt Substances 0.000 description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052493 LiFePO4 Inorganic materials 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- DJZIBVUGARDLOC-UHFFFAOYSA-N [Ni]=O.[Co]=O.[Li] Chemical compound [Ni]=O.[Co]=O.[Li] DJZIBVUGARDLOC-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
-
- 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
Abstract
The invention discloses a method for manufacturing lithium-ion batteries, which comprises a battery-precharging process. The method is characterized in that the battery-precharging process is realizedin the following way: using a precharging device to precharge a battery and using a vacuumizing device to vacuumize the inside of the battery at the same time, wherein the pressure in the vacuumizingprocess is set to be between 0.03 and 0.08 MPa; the precharging capacity is set to be 0.15 to 1 times of nominal capacity; and the precharging current is set to be between 0.05 and 1 C. The method adopting vacuum precharging can quickly and thoroughly discharge gas produced in the precharging process inside the battery and eliminate insulation region produced by the gas, thereby improving the capacity exerting-cycling performance of the battery, effectively eliminating or reducing lithium-separation situation of pole pieces, guaranteeing the qualified size of the battery and shortening precharging time. In addition, relative to the prior method, the method can leave out the processes of plugging cotton and covering rubber plugs.
Description
Technical field
The present invention relates to battery and make the field, specifically relate to a kind of manufacture method of lithium ion battery.
Background technology
Comprise the precharge technology to battery in the manufacture process of lithium ion battery, its effect is to form the SEI film by constant current charge to the mode of certain voltage on the battery cathode surface.In SEI film forming process, can produce gas, discharge by exhaust outlet.The SEI film prevents that as protective layer electrolyte and negative pole from reacting, and good ion migrating channels can be provided, and in order effectively to form the SEI film, the battery pre-charging process is the important step during battery is made.
Present lithium ion battery except that the box hat cylindrical battery, adopts the method for liquid injection hole opening preliminary filling in making more, and purpose keeps air pressure balance in order to make inside battery with outside, thereby can discharge the gas that inside battery preliminary filling process produces.But in order to prevent the air suck-back, often seal up adhesive tape at the liquid injection hole place, put gum cover again, cause that inside battery can keep certain malleation in the preliminary filling process, the gas that can't guarantee the generation of preliminary filling process is effectively discharged, thereby the formation insulating regions causes each the zone reaction of utmost point group inhomogeneous, and the preliminary filling process can not make air-generating reaction carry out fully.As the mouth-sealing method and the battery in the disclosed a kind of lithium ion battery fluid injection of Chinese patent literature CN1893163A hole, adopt adhesive plaster to seal liquid injection port, gas is discharged in application of force extruding then.There is following drawback in this precharge technology: 1) because of there being insulating regions, the utilance of active material can reduce, and chemical property descends.2) because of there being insulating regions, partial volume subsequently and cyclic process will inevitably cause the subregion to analyse lithium, influence battery safety.3) air-generating reaction is incomplete during preliminary filling, and processes such as aging, partial volume, circulation still may have gas and produce, and make battery size exceed standard easily, and battery size is big more, and it is obvious more that size exceeds standard; 4) if use big pre-charge, aerogenesis speed can be much larger than exhaust velocity, and above-mentioned drawback can be more obvious, thus can not use big pre-charge, thus make pre-charging time very long.
Summary of the invention
The technical problem to be solved in the present invention overcomes above defective exactly, proposes a kind of manufacture method of lithium ion battery, can thoroughly discharge the gas in the pre-charge process rapidly, improves battery performance, shortens precharge time.
Technical problem of the present invention is achieved by the following technical programs.
The manufacture method of this lithium ion battery comprises battery preliminary filling process, it is characterized in that, described battery preliminary filling process realizes in the following manner: use pre-fill device to battery pre-charging, and use vaccum-pumping equipment that inside battery is vacuumized simultaneously.
Pressure during described vacuumizing is set at 0.01MPa～0.1MPa.
Described pressure is set at 0.03MPa～0.08MPa.
Described precharge priming volume is set at 0.15～1 times of nominal capacity.
Preliminary filling electric current during described precharge is set at 0.05C～1C.
Described battery preliminary filling process is divided into a plurality of time periods, and each time period has corresponding preliminary filling current setting value.
Described battery preliminary filling process is divided into a plurality of time periods, and each time period has different preliminary filling current setting values.
Each time period setting is vacuumized pressure values accordingly.
Described battery preliminary filling process is divided into two time periods, at first adopts current charges 30min～90min of 0.05C～0.2C, and the pre-charge that adopts 0.2C～0.6C again is to finishing.
Vaccum-pumping equipment is realized inside battery is vacuumized by the liquid injection hole that connects on the end cover for battery cells.
The present invention is compared with the prior art the beneficial effect that is had: vacuumize simultaneously in the battery pre-charging process, the method of this vacuum preliminary filling can be discharged the gas that inside battery preliminary filling process produces fast up hill and dale, eliminate the insulating regions that gas produces, thereby improve the capacity performance and the cycle performance of battery, effectively elimination or reduction pole piece are analysed the lithium situation.And, avoid the aerogenesis phenomenon in follow-up aging, partial volume, the cyclic process because inside battery is a negative pressure, and air-generating reaction is complete, guarantee that battery size is qualified.Can use big multiplying power pre-charge, accelerate preliminary filling speed, shorten pre-charging time.And existing relatively method, the operation of can save rubberized fabric, filling in cotton, overlapping plug.
Description of drawings
Fig. 1 is the battery capacity conservation rate comparison diagram among the embodiment 1;
Fig. 2 is the battery capacity conservation rate comparison diagram among the embodiment 2;
Fig. 3 is the battery capacity conservation rate comparison diagram among the embodiment 3;
Fig. 4 is the battery capacity conservation rate comparison diagram among the embodiment 4;
Fig. 5 is the battery capacity conservation rate comparison diagram among the embodiment 5.
Embodiment
Assembling Bike Battery Co., Ltd., Shenzhen city model is the Battery pack of 423450A, thick * wide * height=4.5mm * 34mm * 50mm, positive electrode uses cobalt acid lithium, during preliminary filling, earlier with 0.1C constant current charge 30min, with 0.5C constant current charge 30min, whole pre-charging time is 60min again, and priming volume is 30% of a nominal capacity.Whole preliminary filling process, the pipeline of the vacuum extractor invariablenes pressure of liquid of bleeding is 0.07MPa.Through test, use the battery of above-mentioned method for pre-charging, the specific capacity of cobalt acid lithium is 147.8mAh/g when the 0.2C constant-current discharge, and the specific capacity of cobalt acid lithium is 146.1mAh/g when the 1C constant-current discharge, and after the circulation 300 times, capability retention reaches 87.4% to normal temperature down.
On the same group above-mentioned other batteries are used conventional methods, promptly do not vacuumize during preliminary filling, with 0.1C preliminary filling 390min.After tested, the specific capacity of cobalt acid lithium has only 146.3mAh/g when the 0.2C constant-current discharge, and the specific capacity of cobalt acid lithium has only 143.8mAh/g when the 1C constant-current discharge, and after the 1C circulation 300 times, capability retention is 82.6% under the normal temperature.Both battery capacity conservation rates are seen Fig. 1, and wherein curve 1 is the curve of the battery capacity conservation rate of employing the inventive method, and curve 2 is the curve of the battery capacity conservation rate of employing conventional method.
From above contrast as can be seen, after use the inventive method, shorten pre-charging time greatly, production efficiency and battery performance are obviously promoted.
Assembling Bike Battery Co., Ltd., Shenzhen city model is the Battery pack of 423048A, thick * wide * height=4.5mm * 30mm * 48mm, cell positive material uses the mixed system of cobalt acid lithium and nickle cobalt lithium manganate, earlier with 0.1C constant current charge 60min, then with 0.3C constant current charge 30min, with 0.5C pre-charge 12min, whole pre-charging time is 102min again, and priming volume is 35% of a nominal capacity.Before during the 90min preliminary filling, the pipeline invariablenes pressure of liquid of bleeding is 0.05MPa, during back 12min preliminary filling, the invariablenes pressure of liquid of bleeding is 0.08MPa.After tested, use the battery of above-mentioned method for pre-charging, the specific capacity of positive active material is 150.6mAh/g when the 0.2C constant-current discharge, and the specific capacity of positive active material is 146.3mAh/g when the 1C constant-current discharge, after the 1C circulation 300 times, capability retention reaches 88.9% under the normal temperature.
To above-mentioned other batteries use conventional methods on the same group, do not vacuumize when being preliminary filling, with 0.1C preliminary filling 390min, the specific capacity of positive active material has only 148.8mAh/g when the 0.2C constant-current discharge after tested, the specific capacity of positive active material has only 143.6mAh/g when the 1C constant-current discharge, after the following circulation of normal temperature 300 times, capability retention is 85.5%.The two battery capacity conservation rate is seen Fig. 2, and wherein curve 1 is the curve of the battery capacity conservation rate of employing the inventive method, and curve 2 is the curve of the battery capacity conservation rate of employing conventional method.
From above contrast as can be seen, after use the inventive method, production efficiency and battery performance increase.
Embodiment 3
Assembling Bike Battery Co., Ltd., Shenzhen city model is the Battery pack of 053048A, thick * wide * height=5.3mm * 30mm * 48mm, cell positive material uses the mixed system of LiMn2O4 and nickle cobalt lithium manganate, earlier with 0.1C constant current charge 30min, then with 0.3C constant current charge 30min, with 0.6C pre-charge 30min, whole pre-charging time is 90min again, and priming volume is 50% of a nominal capacity.Before during the 70min preliminary filling, the pipeline invariablenes pressure of liquid of bleeding is 0.05MPa, during back 20min preliminary filling, the invariablenes pressure of liquid of bleeding is 0.08MPa.After tested, use the battery of above-mentioned method for pre-charging, the specific capacity of positive active material is 129.8mAh/g when the 0.2C constant-current discharge, and the specific capacity of positive active material is 126.9mAh/g when the 1C constant-current discharge, after the 1C circulation 300 times, capability retention reaches 85.1% under the normal temperature.
To above-mentioned other batteries use conventional methods on the same group, do not vacuumize during preliminary filling, with 0.1C preliminary filling 390min, after tested, the specific capacity of positive active material has only 128.1mAh/g when the 0.2C constant-current discharge, the specific capacity of positive active material has only 124.5mAh/g when the 1C constant-current discharge, and down after the circulation 300 times, capability retention is 81.9% to normal temperature.Both battery capacity conservation rates are seen Fig. 3, and wherein curve 1 is the curve of the battery capacity conservation rate of employing the inventive method, and curve 2 is the curve of the battery capacity conservation rate of employing conventional method.
From above contrast as can be seen, after use the inventive method, production efficiency and battery performance increase.
Embodiment 4
Assembling Bike Battery Co., Ltd., Shenzhen city model is the Battery pack of 103450A, thick * wide * height=10.0mm * 34mm * 50mm, cell positive material uses the mixed system of cobalt acid lithium and lithium nickel cobalt dioxide, earlier with 0.1C constant current charge 30min, then with 0.3C constant current charge 60min, with 0.6C pre-charge 20min, whole pre-charging time is 110min again, and priming volume is 55% of a nominal capacity.Before during the 90min preliminary filling, the pipeline invariablenes pressure of liquid of bleeding is 0.03MPa, during back 20min preliminary filling, the invariablenes pressure of liquid of bleeding is 0.08MPa.After tested, use the battery of above-mentioned method for pre-charging, the specific capacity of positive active material is 156.4mAh/g when the 0.2C constant-current discharge, the specific capacity of positive active material is 151.2mAh/g when the 1C constant-current discharge, under the normal temperature after the 1C circulation 300 times, capability retention reaches 85.6%, and full electric negative plate surface nothing is obviously analysed the lithium phenomenon.
To above-mentioned other batteries use conventional methods on the same group, be that the preliminary filling process is not bled, adopt above-mentioned same preliminary filling work step, the specific capacity of positive active material has only 153.1mAh/g when the 0.2C constant-current discharge after tested, the specific capacity of positive active material has only 146.5mAh/g when the 1C constant-current discharge, after the following circulation of normal temperature 300 times, capability retention is 82.6%.Both battery capacity conservation rates are seen Fig. 4, and wherein curve 1 is the curve of the battery capacity conservation rate of employing the inventive method, and curve 2 is the curve of the battery capacity conservation rate of employing conventional method.
After adding up the two again and sealing back, aging back, partial volume, the battery size of high temperature after cleaning, comparing result sees Table one, as seen adopt the method for vacuum preliminary filling of the present invention after, during preliminary filling the aerogenesis reflection fully, battery size is normal.
Table one
Embodiment 5:
Assembling Bike Battery Co., Ltd., Shenzhen city model is the Battery pack of 277082S, thick * wide * height=2.7mm * 70mm * 82mm, cell positive material uses LiFePO4, elder generation is with 0.1C constant current charge 60min during preliminary filling, then with 0.5C constant current charge 30min, whole pre-charging time is 90min, and priming volume is 35% of a nominal capacity.Whole preliminary filling process, the pipeline invariablenes pressure of liquid of bleeding is 0.04MPa.After tested, use the battery of above-mentioned method for pre-charging, the specific capacity of LiFePO4 is 125.8mAh/g when the 1C constant-current discharge, and the specific capacity of LiFePO4 is 119.7mAh/g when the 5C constant-current discharge, after the 1C charging 3C discharge cycles 500 times, capability retention reaches 95.97% under the normal temperature.
To above-mentioned other batteries use conventional methods on the same group, be that the preliminary filling process is not bled, after tested, the specific capacity of positive active material has only 122.7mAh/g when the 1C constant-current discharge, the specific capacity of positive active material has only 115.6mAh/g when the 3C constant-current discharge, after the 1C charging 3C discharge cycles 500 times, capability retention is 93.79% under the normal temperature.Both battery capacity conservation rates are seen Fig. 5, and wherein curve 1 is the curve of the battery capacity conservation rate of employing the inventive method, and curve 2 is the curve of the battery capacity conservation rate of employing conventional method.As seen, the untimely discharge of gas that the preliminary filling process produces, to the battery performance influence obviously.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the manufacture method of a lithium ion battery comprises battery preliminary filling process, it is characterized in that, described battery preliminary filling process realizes in the following manner: use pre-fill device to battery pre-charging, and use vaccum-pumping equipment that inside battery is vacuumized simultaneously.
2. the manufacture method of lithium ion battery as claimed in claim 1, it is characterized in that: the pressure during described vacuumizing is set at 0.01MPa～0.1MPa.
3. as the manufacture method of lithium ion battery as claimed in claim 2, it is characterized in that: described pressure is set at 0.03MPa～0.08MPa.
4. as the manufacture method of claim 2 or 3 described lithium ion batteries, it is characterized in that: described precharge priming volume is set at 0.15～1 times of nominal capacity.
5. the manufacture method of lithium ion battery as claimed in claim 4 is characterized in that: the preliminary filling electric current during described precharge is set at 0.05C～1C.
6. the manufacture method of lithium ion battery as claimed in claim 5, it is characterized in that: described battery preliminary filling process is divided into a plurality of time periods, and each time period has corresponding preliminary filling current setting value.
7. the manufacture method of lithium ion battery as claimed in claim 6, it is characterized in that: described battery preliminary filling process is divided into a plurality of time periods, and each time period has different preliminary filling current setting values.
8. the manufacture method of lithium ion battery as claimed in claim 6, it is characterized in that: described battery preliminary filling process is divided into two time periods, at first adopts current charges 30min～90min of 0.05C～0.2C, again with the pre-charge of 0.2C～0.6C to finishing.
9. the manufacture method of lithium ion battery as claimed in claim 6 is characterized in that: each time period is set vacuumized pressure values accordingly.
10. the manufacture method of lithium ion battery as claimed in claim 1 is characterized in that: vaccum-pumping equipment is realized inside battery is vacuumized by the liquid injection hole that connects on the end cover for battery cells.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810142195A CN101673848A (en) | 2008-09-11 | 2008-09-11 | Method for manufacturing lithium-ion batteries |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810142195A CN101673848A (en) | 2008-09-11 | 2008-09-11 | Method for manufacturing lithium-ion batteries |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195104A (en) * | 2010-03-17 | 2011-09-21 | 深圳市比克电池有限公司 | Method for detecting batteries in precharging state |
| CN102214839A (en) * | 2010-04-07 | 2011-10-12 | 深圳市比克电池有限公司 | Liquid-state soft package lithium battery and preparation method thereof |
| CN104409790A (en) * | 2014-11-27 | 2015-03-11 | 中航锂电（洛阳）有限公司 | Pre-charge formation method for lithium-ion battery |
| CN108116855A (en) * | 2017-12-27 | 2018-06-05 | 安徽嘉熠智能科技有限公司 | A kind of handling system for cylinder type lithium battery workshop |
| CN112018449A (en) * | 2020-08-13 | 2020-12-01 | 昆山聚创新能源科技有限公司 | Manufacturing method and hot-pressing device for lithium battery soft package battery cell |
-
2008
- 2008-09-11 CN CN200810142195A patent/CN101673848A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195104A (en) * | 2010-03-17 | 2011-09-21 | 深圳市比克电池有限公司 | Method for detecting batteries in precharging state |
| CN102195104B (en) * | 2010-03-17 | 2014-09-24 | 深圳市比克电池有限公司 | Method for detecting batteries in precharging state |
| CN102214839A (en) * | 2010-04-07 | 2011-10-12 | 深圳市比克电池有限公司 | Liquid-state soft package lithium battery and preparation method thereof |
| CN104409790A (en) * | 2014-11-27 | 2015-03-11 | 中航锂电（洛阳）有限公司 | Pre-charge formation method for lithium-ion battery |
| CN108116855A (en) * | 2017-12-27 | 2018-06-05 | 安徽嘉熠智能科技有限公司 | A kind of handling system for cylinder type lithium battery workshop |
| CN108116855B (en) * | 2017-12-27 | 2024-04-26 | 安徽嘉熠智能科技有限公司 | Handling system for cylindrical lithium battery production workshop |
| CN112018449A (en) * | 2020-08-13 | 2020-12-01 | 昆山聚创新能源科技有限公司 | Manufacturing method and hot-pressing device for lithium battery soft package battery cell |
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