CN209447926U - Lithium ion battery negative electrode material prelithiation device - Google Patents
Lithium ion battery negative electrode material prelithiation device Download PDFInfo
- Publication number
- CN209447926U CN209447926U CN201920225762.XU CN201920225762U CN209447926U CN 209447926 U CN209447926 U CN 209447926U CN 201920225762 U CN201920225762 U CN 201920225762U CN 209447926 U CN209447926 U CN 209447926U
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- CN
- China
- Prior art keywords
- lithium
- prelithiation
- coating unit
- ion battery
- lithium ion
- 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.)
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- 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
- 239000007773 negative electrode material Substances 0.000 title claims description 20
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 52
- 239000011248 coating agent Substances 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- -1 polytetrafluoroethylene ethylene Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000843 powder Substances 0.000 abstract description 5
- 238000010924 continuous production Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 238000006138 lithiation reaction Methods 0.000 abstract 4
- 238000000034 method Methods 0.000 description 18
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000011888 foil Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model discloses a lithium ion battery negative pole material lithiation device in advance, including the unwinding mechanism that connects gradually, preheat the mechanism, lithiation mechanism and winding mechanism in advance, lithiation mechanism in advance is including the first coating device, the first cooling device that connect gradually, be used for direction roller set, second coating device and the second cooling device with the upset of negative pole material plane. Adopt the utility model discloses a lithiation device in advance can realize two-sided lithium in advance in a flow, and easy operation can realize continuous production, improves production efficiency by a wide margin, and adopts lithium liquid coating, has solved and has adopted lithium powder lithium in advance a great deal of not enough.
Description
Technical field
The utility model relates to lithium ion batteries to manufacture field, and in particular to a kind of lithium ion battery negative material is pre-
Lithiumation device.
Background technique
The lithium ion battery electric energy important as one kind is for the energy, because its energy density is high, voltage rating is high, service life
The features such as long and be widely used in the fields such as number, communication, traffic.During lithium ion battery first charge-discharge, cathode
Material and electrolyte react on solid-liquid phase interface, form one layer of passivating film for being covered in negative electrode material surface, the passivation
Film is referred to as solid electrolyte film (SEI film).SEI film can effectively avoid because solvent molecule is embedded in altogether and caused by cathode
The destruction of material, to improve the service life of electrode.But SEI film can consume part lithium ion, and this in forming process
A reaction is capacity that is irreversible, thus can reducing battery, and the first charge discharge efficiency of battery is caused to reduce.For this purpose, researcher is confused
It confusingly carries out exploring and proposes different solutions, and wherein prelithiation technology is to solve lithium ion battery first charge discharge efficiency to reduce
Effective means.
It is disclosed application No. is 201610298593.3 patent and a kind of cathode pole piece and metal lithium sheet is successively spaced leaching
It in electrolyte, and is charged to cathode pole piece come the method for completing the pre- lithium of cathode, cathode pole piece and metal be one by one in this method
It corresponds to and does not contact.This method can simulate formation process to greatest extent, and the effect of the SEI film formed is preferable, but should
Method operation difficulty is excessive, and can not carry out continuous production, influences production efficiency.
Application No. is 201711267112.3 patents to disclose a kind of device and method of pre- lithium of cathode pole piece, using essence
The two sides that lithium foil is compounded in copper foil are formed composite material by close roll squeezer, then are completed by processes such as coating, drying, roll-ins pre-
The production of cathode of lithium pole piece.This method can make full use of existing equipment, and cost of manufacture is lower.But this method makes cathode pole
During piece, slurry, which is coated on composite material, when coating is directly contacted with lithium foil.After lithium foil dusting disappearance, bear
The caking property of pole material is difficult to ensure.
Further, it is also possible to directly carry out benefit lithium in cathode pole piece surface direct spraying lithium powder, when chemical conversion, is sprayed on cathode
Lithium powder on pole piece can compensate SEI film and form consumed lithium ion, to improve the capacity of battery.This method side easy to operate
Just, but lithium powder is easy to drift in air, and safety is relatively difficult to guarantee.
Utility model content
Based on this, the utility model provides a kind of lithium ion battery negative material prelithiation device, practical new using this
The prelithiation device of type can realize two-sided pre- lithium in a process, easy to operate, it can be achieved that continuous production, greatly improves
Production efficiency, and coated using lithium liquid, solve many deficiencies using the pre- lithium of lithium powder.
To achieve the goals above, the utility model uses following technical scheme:
A kind of lithium ion battery negative material prelithiation device, including sequentially connected unreeling structure, preheating mechanism, pre- lithium
Change mechanism and rolling-up mechanism, the prelithiation mechanism includes sequentially connected first coating unit, the first cooling device, for inciting somebody to action
The guide roller group of negative electrode material planar inverted, the second coating unit and the second cooling device.Firstly, by the first coating unit and
First cooling device carries out pre- lithium to negative electrode material on one side upward, then makes negative electrode material planar inverted by guide roller group
Another face-up, carrying out pre- lithium using the second coating unit and the second cooling device can be real using the device of the utility model
An existing process completes two-sided pre- lithium, significantly improves the pre- lithium efficiency of negative electrode material.
Further, the first directive wheel is equipped between the unreeling structure and preheating mechanism, for by the cathode after unreeling
Material is oriented to preheating mechanism；The second directive wheel is equipped between second cooling device and rolling-up mechanism, it is two-sided for that will complete
The negative electrode material guiding rolling-up mechanism of pre- lithium is wound.
Further, in the prelithiation mechanism, first cooling device is set to the upper of second coating unit
Side, the guide roller group by be arranged in semicircular arc-shaped several guide roller groups at and the guide roller be arranged in it is semicircular arc-shaped, half
One end of circular arc is connect with first cooling device, and the other end is connect with second coating unit.The utility model pair
Prelithiation device is optimized, by guide roller group with several guide roller groups at, and be arranged in it is semicircular arc-shaped, specifically, first
Cooling device is set to the top of the second coating unit, and one end of guide roller group semi arch is connect with first cooling device,
The other end is connect with second coating unit, and the negative electrode material removed from the first cooling device is realized flat by guide roller group
Face overturning, the one side overturning of not pre- lithium upward, move into the second coating unit and carry out pre- lithium.
Preferably, the guide roller, second directive wheel are stainless steel material, and surface is coated with polytetrafluoroethyl-ne
Alkene layer.Due to that can contact with guide roller group, the second directive wheel in negative electrode material is mobile, guide roller, second are oriented in order to prevent
Wheel sticks together with lithium film, coats polytetrafluoroethylene ethylene layer on the surface of guide roller, the second directive wheel.
Further, the inside of first coating unit is successively arranged heating chamber and mold cavity from top to bottom, described to add
The discharge port of hot chamber is connected to the feed inlet of the mold cavity, is equipped with extrusion in the lower end of first coating unit, described
Extrusion is connected to the discharge port of the mold cavity, for squeezing out lithium liquid from the first coating unit；The second coating dress
The structure set is identical as the first coating unit.Added with lithium ingot in heating chamber, after the heating fusing of lithium ingot under the effect of gravity into
Enter to be formed in mold cavity and stablize lithium liquid, the lithium liquid in mold cavity is squeezed out by extrusion under the effect of gravity, so that lithium liquid be applied
It overlays in mobile negative electrode material, forms certain thickness lithium film, using the cooling of cooling device, complete negative electrode material wherein
Prelithiation on one side.
Compared with prior art, the utility model has the following beneficial effects:
1, two-sided pre- lithium can be achieved in a production procedure using the prelithiation device of the utility model, use is roll-to-roll
Mode guarantees the uniformity of product, can be continuously produced, and can effectively improve the pre- lithium efficiency of negative electrode material.
2, it is coated using lithium liquid, and coated side is always upward, avoids the influence that gravity coats lithium liquid.
3, the lithium film thickness of automated production, coating can be controlled by the speed of service of adjustment equipment, easy to operate
It is convenient.
Detailed description of the invention
Fig. 1 is the overall structure diagram of prelithiation device in one preferred embodiment of the utility model；
Fig. 2 is the schematic diagram of internal structure of the first coating unit in Fig. 1.
In figure: 1- unreeling machine, the first directive wheel of 2-, 3- preheating machine, 4- prelithiation mechanism, the second directive wheel of 5-, 6- winding
Machine, the first coating machine of 41-, the first cooler of 42-, 43- guide roller group, the second coating machine of 44-, the second cooler of 45-, 411- add
Hot chamber, 412- mold cavity, 413- extrusion.
Specific embodiment
Under for the ease of understanding the utility model, below in conjunction with specific embodiments to the utility model carry out more comprehensively
Description.But the utility model can be realized in many different forms, however it is not limited to embodiment party described herein
Formula.On the contrary, the purpose of providing these embodiments is that making the disclosure of the utility model more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Please refer to Fig. 1, a kind of lithium ion battery negative material prelithiation device, including sequentially connected unreeling machine 1, first
Directive wheel 2, preheating machine 3, prelithiation mechanism 4, the second directive wheel 5 and winder 6, prelithiation mechanism 4 include sequentially connected the
One coating machine 41, the first cooler 42, guide roller group 43, the second coating machine 44 and the second cooler 45.In the present embodiment, right
The arrangement of prelithiation device Zhong Ge mechanism is optimized, as shown in Figure 1, unreeling machine 1, the first directive wheel 2, preheating machine 3, first
Coating machine 41, the first cooler 42 are in same horizontal line, can fully ensure that it is smooth in negative electrode material moving process, and
It is located at top in whole device；Likewise, the second coating machine 44, the second cooler 45, the second directive wheel 5 and winder 6
In same horizontal line, and the lower part being located in whole device.
Guide roller group 43 is by several guide roller groups at and guide roller is arranged in semicircular arc-shaped, one end of semi arch and first
Cooler 42 connects, and the other end is connect with second coating machine 44.Guide roller, the second directive wheel 5 are all made of stainless steel material,
And its surface is coated with polytetrafluoroethylene ethylene layer, the lithium film for preventing negative electrode material from coating in moving process sticks together.
Further, as shown in Fig. 2, being successively arranged 411 He of heating chamber from top to bottom in the inside of the first coating machine 41
The discharge port of mold cavity 412, heating chamber 411 is connected to the feed inlet of mold cavity 412, is equipped with and is squeezed in the lower end of the first coating machine 41
Outlet 413, extrusion 413 is connected to the discharge port of mold cavity 412, for squeezing out lithium liquid from the first coating machine 41；At this
In embodiment, the structure of the second coating machine 44 is identical as the first coating machine 41.
When specific production, negative electrode material volume is unreeled by the way of upper uncoiling, wherein one side is upward for negative electrode material
Into being preheated in preheating machine 2；Lithium ingot is added simultaneously in the heating chamber of the first coating machine 41 and the second coating machine 44 and is heated
Fusing enters in mold cavity after the fusing of lithium ingot, squeezes out the coating for carrying out lithium liquid under the effect of gravity, subsequently enter the first cooler
It is cooling in 42, then pass through semicircular arc-shaped guide roller group 43, by the not pre- lithium of negative electrode material overturning for upward while,
The coating of lithium liquid is carried out by the second coating machine 44, the second cooler 45 is subsequently entered and is cooled down, the coating thickness of lithium film can be with
By controlling the movement speed adjustment of negative electrode material, is finally wound by the way of lower winding, it is negative to complete lithium ion battery
The two-sided prelithiation of pole material.
Using the prelithiation device of the utility model, the two-sided pre- lithium of negative electrode material can be realized in a production procedure,
Production efficiency is greatly improved, and uses the pre- lithium of lithium liquid, avoids many deficiencies in the prior art.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (5)
1. a kind of lithium ion battery negative material prelithiation device, including sequentially connected unreeling structure, preheating mechanism, prelithiation
Mechanism and rolling-up mechanism, which is characterized in that the prelithiation mechanism includes sequentially connected first coating unit, the first cooling dress
It sets, for by the guide roller group of negative electrode material planar inverted, the second coating unit and the second cooling device.
2. lithium ion battery negative material prelithiation device as described in claim 1, which is characterized in that the unreeling structure and
It is equipped with the first directive wheel between preheating mechanism, the second directive wheel is equipped between second cooling device and rolling-up mechanism.
3. lithium ion battery negative material prelithiation device as claimed in claim 2, which is characterized in that in the prelithiation machine
In structure, first cooling device be set to second coating unit top, the guide roller group by several guide roller groups at
And the guide roller is arranged in semicircular arc-shaped, one end of semi arch is connect with first cooling device, the other end with it is described
The connection of second coating unit.
4. lithium ion battery negative material prelithiation device as claimed in claim 3, which is characterized in that the guide roller, institute
Stating the second directive wheel is stainless steel material, and surface is coated with polytetrafluoroethylene ethylene layer.
5. lithium ion battery negative material prelithiation device as described in claim 1, which is characterized in that the first coating dress
The inside set is successively arranged heating chamber and mold cavity, the feed inlet of the discharge port of the heating chamber and the mold cavity from top to bottom
Connection is equipped with extrusion in the lower end of first coating unit, and the extrusion is connected to the discharge port of the mold cavity, is used
In lithium liquid is squeezed out from the first coating unit；The structure of second coating unit is identical as the first coating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920225762.XU CN209447926U (en) | 2019-02-22 | 2019-02-22 | Lithium ion battery negative electrode material prelithiation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920225762.XU CN209447926U (en) | 2019-02-22 | 2019-02-22 | Lithium ion battery negative electrode material prelithiation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209447926U true CN209447926U (en) | 2019-09-27 |
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|---|---|---|---|
| CN201920225762.XU Active CN209447926U (en) | 2019-02-22 | 2019-02-22 | Lithium ion battery negative electrode material prelithiation device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397688A (en) * | 2020-11-16 | 2021-02-23 | 东莞塔菲尔新能源科技有限公司 | Lithium system is mended to pole piece |
| CN113172110A (en) * | 2021-04-27 | 2021-07-27 | 中船重工黄冈水中装备动力有限公司 | Device for coating metal lithium |
| CN114147192A (en) * | 2021-12-07 | 2022-03-08 | 电子科技大学长三角研究院(湖州) | Method and device for preparing ultrathin lithium strip/foil by inclined self-casting |
| CN115360437A (en) * | 2022-08-23 | 2022-11-18 | 楚能新能源股份有限公司 | Prelithiation method, method for manufacturing lithium secondary battery, and lithium secondary battery |
-
2019
- 2019-02-22 CN CN201920225762.XU patent/CN209447926U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397688A (en) * | 2020-11-16 | 2021-02-23 | 东莞塔菲尔新能源科技有限公司 | Lithium system is mended to pole piece |
| CN112397688B (en) * | 2020-11-16 | 2022-04-15 | 江苏正力新能电池技术有限公司 | Lithium system is mended to pole piece |
| CN113172110A (en) * | 2021-04-27 | 2021-07-27 | 中船重工黄冈水中装备动力有限公司 | Device for coating metal lithium |
| CN113172110B (en) * | 2021-04-27 | 2024-03-29 | 中船重工黄冈水中装备动力有限公司 | Device for coating metallic lithium |
| CN114147192A (en) * | 2021-12-07 | 2022-03-08 | 电子科技大学长三角研究院(湖州) | Method and device for preparing ultrathin lithium strip/foil by inclined self-casting |
| CN115360437A (en) * | 2022-08-23 | 2022-11-18 | 楚能新能源股份有限公司 | Prelithiation method, method for manufacturing lithium secondary battery, and lithium secondary battery |
| CN115360437B (en) * | 2022-08-23 | 2023-04-14 | 楚能新能源股份有限公司 | Prelithiation method, method for manufacturing lithium secondary battery, and lithium secondary battery |
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