CN215896485U - Pre-lithium cell processing device and pre-lithium cell processing system - Google Patents
Pre-lithium cell processing device and pre-lithium cell processing system Download PDFInfo
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- CN215896485U CN215896485U CN202122383660.0U CN202122383660U CN215896485U CN 215896485 U CN215896485 U CN 215896485U CN 202122383660 U CN202122383660 U CN 202122383660U CN 215896485 U CN215896485 U CN 215896485U
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to the technical field of battery cell processing equipment, in particular to a pre-lithium battery cell processing device and a pre-lithium battery cell processing system. According to the pre-lithium battery cell processing device provided by the utility model, the diaphragm and the lithium foil are combined by arranging the first combining mechanism and the second combining mechanism, so that a first combining belt and a second combining belt are formed, then the first combining belt and the second combining belt are cut by the cutting unit, the diaphragm and the lithium foil are combined in advance, and then the combined structure is cut into pieces independently, so that the subsequent lamination step is facilitated, the lithium foil and a negative electrode plate are not required to be assembled together and then die-cut, and the safety coefficient is improved; simultaneously, carry out the independent cut-parts to the structure after diaphragm and lithium foil cover, can be with the cut-parts step leading, reduce the degree of difficulty of cut-parts step.
Description
Technical Field
The utility model relates to the technical field of battery cell processing equipment, in particular to a pre-lithium battery cell processing device and a pre-lithium battery cell processing system.
Background
The lithium ion battery has the advantages of high specific energy, long service life, safety, environmental protection and the like, and is widely applied to the fields of notebook computers, mobile phones, digital cameras, electric automobiles, energy storage and the like. Lithium loss exists in the lithium ion battery in the charging and discharging process, the loss can be made up in a lithium supplementing mode, the first effect loss of an anode can be made up through a lithium supplementing technology, and meanwhile, an extra lithium source can be provided, so that the energy density and the cycle performance of the lithium ion battery are greatly improved. In the prior art, lithium supplement operation is mainly performed by adding a positive electrode lithium-rich material, pre-lithiating a negative electrode, lithium supplement in a lithium belt and the like, wherein the lithium supplement efficiency of the lithium belt is high compared with that of other modes, no side reaction exists, and the safety is high. However, in the current lithium pre-lithium method, after the lithium is pre-lithium, the lithium foil is positioned on the outer surface of the negative electrode layer, so that the safety risk of subsequent battery cell processing is increased, and particularly, safety accidents are very easy to occur in the processes of die cutting, lamination and the like of the pole piece.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the utility model is to overcome the defect of potential safety hazard existing in the prior art that the lithium foil is positioned on the outer surface of the cathode layer after pre-lithium is performed, so that the pre-lithium cell processing device capable of reducing the potential safety hazard is provided.
In order to solve the technical problem, the utility model provides a pre-lithium battery cell processing device, which comprises:
a first laminating mechanism adapted to laminate the separator on the upper side of the lithium foil to form a first laminating tape;
a second laminating mechanism adapted to laminate the separator on the lower side of the lithium foil to form a second laminating tape;
and a cutting unit adapted to cut the first and second cover tapes.
Optionally, the first combining mechanism includes:
a lithium foil reel on which a lithium foil is wound;
a separator reel on which a separator is wound, the separator reel being disposed at an opposite upper position to the lithium foil reel;
and the pressing roller is suitable for pressing the lithium foil and the diaphragm to form a first laminating belt.
Optionally, the second compound mechanism includes:
a lithium foil reel on which a lithium foil is wound;
a separator reel on which a separator is wound, the separator reel being disposed at a position relatively below the lithium foil reel;
and the pressing roller is suitable for pressing the lithium foil and the diaphragm to form a second laminating belt.
Optionally, the first combining mechanism and the second combining mechanism further include:
and the winding shaft is suitable for winding the belt-shaped PET carrier.
Optionally, the processing device for the pre-lithium battery cell further comprises: and the CCD detection unit is suitable for detecting the first covering belt and the second covering belt so as to determine the cutting position of the cutting unit.
Optionally, the processing device for the pre-lithium battery cell further comprises: and the negative electrode reel is suitable for winding the negative electrode sheet.
Optionally, the processing device for the pre-lithium battery cell further comprises: and the positive electrode reel is suitable for winding the positive electrode sheet.
Optionally, the cutting unit is further adapted to cut the negative electrode plate and the positive electrode plate.
Optionally, the processing device for the pre-lithium battery cell further comprises: the lamination mechanism is suitable for sequentially laminating the first lamination unit, the negative pole piece, the second lamination unit and the positive pole piece from top to bottom.
The utility model also provides a pre-lithium battery cell processing system which comprises the pre-lithium battery cell processing device.
The technical scheme of the utility model has the following advantages:
1. according to the pre-lithium battery cell processing device provided by the utility model, the diaphragm and the lithium foil are combined by arranging the first combining mechanism and the second combining mechanism, so that a first combining belt and a second combining belt are formed, then the first combining belt and the second combining belt are cut by the cutting unit, the diaphragm and the lithium foil are combined in advance, and then the combined structure is cut into pieces independently, so that the subsequent lamination step is facilitated, the lithium foil and a negative electrode plate are not required to be assembled together and then die-cut, and the safety coefficient is improved; simultaneously, carry out the independent cut-parts to the structure after diaphragm and lithium foil cover, can be with the cut-parts step leading, reduce the degree of difficulty of cut-parts step.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of a pre-lithium cell processing apparatus according to the present invention;
fig. 2 is a schematic cross-sectional view of a laminated cell.
Description of reference numerals:
1-lithium foil, 2-diaphragm, 3-negative pole piece, 4-positive pole piece, 5-first laminating belt, 6-second laminating belt, 7-first laminating unit and 8-second laminating unit;
11-lithium foil reel, 12-diaphragm reel, 13-compression roller and 14-winding shaft;
100-a first laminating mechanism, 200-a second laminating mechanism;
20-CCD detection unit, 30-negative pole reel, 40-positive pole reel, 50-lamination mechanism and 60-cutting unit.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
Referring to fig. 1 to fig. 2, the apparatus for processing a pre-lithium battery cell provided in this embodiment includes:
a first laminating mechanism 100 adapted to laminate the separator 2 on the upper side of the lithium foil 1 to form a first laminating tape 5;
a second laminating mechanism 200 adapted to laminate the separator 2 on the lower side of the lithium foil 1 to form a second laminating tape 6;
and a cutting unit 60 adapted to cut the first and second cover tapes 5 and 6.
According to the pre-lithium battery cell processing device provided by the embodiment, the first laminating mechanism 100 and the second laminating mechanism 200 are arranged, the diaphragm 2 and the lithium foil 1 are laminated, so that the first laminating belt 5 and the second laminating belt 6 are formed, the first laminating belt 5 and the second laminating belt 6 are cut by the cutting unit 60, the diaphragm 2 and the lithium foil 1 are laminated in advance, and then the laminated structure is cut into pieces independently, so that the subsequent lamination step is facilitated, die cutting is not needed after the lithium foil and a negative electrode plate are assembled together, and the safety coefficient is improved; simultaneously, carry out the independent cut-parts to the structure after diaphragm and lithium foil cover, can be with the cut-parts step leading, reduce the degree of difficulty of cut-parts step.
Preferably, the lithium foil 1 is an ultra-thin metal lithium foil with a band-shaped PET (polyester resin) carrier, and the thickness is preferably 3 μ to 10 μ. Preferably, the lithium foil 1 is a zebra lithium foil, and the interval between two adjacent lithium foils is 3mm-5 mm.
The cutting unit 60 can form a first laminating unit 7 after cutting the first laminating tape 5; the cutting unit 60 can form the second covering unit 8 by cutting the second covering tape 6.
Specifically, the first compound mechanism 100 includes:
a lithium foil reel 11 on which the lithium foil 1 is wound;
a separator reel 12 on which the separator 2 is wound, the separator reel 12 being disposed at an opposite upper position to the lithium foil reel 11;
and the pressing roller 13 is suitable for pressing the lithium foil 1 and the separator 2 to form a first laminating belt 5.
Preferably, the lithium foil 1 is disposed on a band-shaped PET carrier, thereby forming a band shape, facilitating winding on a lithium foil reel 11.
In the first laminating mechanism 100, the lithium foil reel 11 and the separator reel 12 are both disposed at an upstream position of the pressure roller 13, and meanwhile, the separator reel 12 is disposed at a position opposite to the upper position of the lithium foil reel 11, so that after the lithium foil 1 and the separator 2 pass through the pressure roller 13, they are laminated to form the first laminating tape 5 with the separator 2 on the upper side and the separator 2 on the lower side.
Specifically, the second combining mechanism 200 includes:
a lithium foil reel 11 on which the lithium foil 1 is wound;
a separator reel 12 on which the separator 2 is wound, the separator reel 12 being disposed at a relatively lower position of the lithium foil reel 11;
and the pressing roller 13 is suitable for pressing the lithium foil 1 and the separator 2 to form a second laminating belt 6.
In the second laminating mechanism 200, the lithium foil reel 11 and the separator reel 12 are both disposed at an upstream position of the pressing roller 13, and at the same time, the separator reel 12 is disposed at a relatively lower position of the lithium foil reel 11, so that after the lithium foil 1 and the separator 2 pass through the pressing roller 13, they are pressed together to form the second laminating tape 6 with the lithium foil 1 on the upper side and the separator 2 on the lower side.
Preferably, the pressing roller 13 is a hot roller lamination method, and after lamination, the lithium foil 1 is peeled from the belt-shaped PET carrier, so that the lithium foil 1 and the separator 2 are laminated. Subsequently, the tape-like structure obtained by laminating the lithium foil 1 and the separator 2 is cut by the cutting unit 60.
Preferably, the diaphragm 2 is a gluing diaphragm, the pressing roller 13 can heat a laminating area when laminating the lithium foil 1 and the diaphragm 2, the hot laminating temperature is selected within the range of 75-95 ℃, and the binding power range of the diaphragm and the negative plate after hot laminating is 0.5kgf/cm2-10kgf/cm2。
Preferably, a plurality of tensioning roller shafts are arranged on the pre-lithium cell processing device, so that the lithium foil 1 and/or the diaphragm 2 can be tensioned conveniently.
Specifically, the first and second laminating mechanisms 100 and 200 further include:
and the winding shaft 14 is suitable for winding the belt-shaped PET carrier.
After the lithium foil 1 and the separator 2 are laminated, the lithium foil 1 is peeled off from the tape-shaped PET carrier, and the tape-shaped PET carrier is wound by providing the winding shaft 14.
Specifically, the pre-lithium battery cell processing device further comprises: a CCD (visual system) detection unit 20 adapted to detect the first and second laminating tapes 5 and 6 to determine a cutting position of the cutting unit 60.
Because lithium paper tinsel 1 is the interval setting on banded PET carrier, closes area 5 and second through adopting CCD detecting element 20 to first covering and closes area 6 to detect to conveniently decide unit 60 and confirm to cut the position, when making and decide unit 60 and cut, can cut in the position between two adjacent lithium paper tinsels 1, thereby does not destroy lithium paper tinsel 1, guarantees to cut the accuracy of position.
Optionally, a CCD quality detection mechanism may be further disposed between the cutting mechanism and the lamination mechanism, so that the unqualified first or second overlapping units 7 or 8 are eliminated by the CCD quality detection mechanism.
Specifically, the pre-lithium battery cell processing device further comprises: and a negative electrode reel 30 adapted to wind the negative electrode sheet 3.
Specifically, the pre-lithium battery cell processing device further comprises: and a positive electrode reel 40 adapted to wind the positive electrode sheet 4.
Specifically, the cutting unit 60 is further adapted to cut the negative electrode sheet 3 and the positive electrode sheet 4.
Preferably, the negative reel 30 and the positive reel 40 are both wound in a roll form, and further cut by a cutting unit 60, so that the sheets can be conveniently conveyed to the lamination mechanism.
Specifically, the pre-lithium battery cell processing device further comprises: and the lamination mechanism 50 is suitable for sequentially laminating the first lamination unit 7, the negative electrode plate 3, the second lamination unit 8 and the positive electrode plate 4 from top to bottom.
The lamination mechanism 50 sequentially laminates the first lamination unit 7, the negative plate 3, the second lamination unit 8 and the positive plate 4 from top to bottom, and so on, thereby completing the stacking of the battery cell pole group and facilitating the production of the subsequent process.
Adopt this kind of form of piling up for the upper and lower both sides of negative pole piece 3 all laminate mutually with lithium foil 1, and lithium foil 1 still is provided with diaphragm 2 in the one side of keeping away from negative pole piece 3 simultaneously.
Example two
The embodiment provides a pre-lithium battery cell processing system, which comprises the pre-lithium battery cell processing device according to the first embodiment.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. A pre-lithium battery cell processing device is characterized by comprising:
a first laminating mechanism (100) adapted to laminate the separator (2) on the upper side of the lithium foil (1) to form a first laminating tape (5);
a second laminating mechanism (200) which is suitable for laminating the diaphragm (2) on the lower side of the lithium foil (1) to form a second laminating belt (6);
and a cutting unit (60) adapted to cut the first and second cover tapes (5, 6).
2. The pre-lithium battery cell processing device according to claim 1, wherein the first lamination mechanism (100) comprises:
a lithium foil reel (11) on which a lithium foil (1) having a tape-shaped PET carrier is wound;
a separator reel (12) on which a separator (2) is wound, the separator reel (12) being disposed at a position relatively above the lithium foil reel (11);
and the pressing roller (13) is suitable for pressing the lithium foil (1) and the separator (2) to form a first laminating belt (5).
3. The pre-lithium battery cell processing device according to claim 1, wherein the second lamination mechanism (200) comprises:
a lithium foil reel (11) on which a lithium foil (1) having a tape-shaped PET carrier is wound;
a separator reel (12) on which a separator (2) is wound, the separator reel (12) being disposed at a position relatively below the lithium foil reel (11);
and the pressing roller (13) is suitable for pressing the lithium foil (1) and the separator (2) to form a second laminating belt (6).
4. The pre-lithium battery cell processing device according to claim 2 or 3, wherein the first and second laminating mechanisms (100, 200) further comprise:
and the winding shaft (14) is suitable for winding the belt-shaped PET carrier.
5. The pre-lithium battery cell processing apparatus of claim 1, further comprising: a CCD detection unit (20) adapted to detect the first and second overlapping belts (5, 6) to determine a cutting position of the cutting unit (60).
6. The pre-lithium battery cell processing apparatus of claim 1, further comprising: and a negative electrode reel (30) adapted to wind the negative electrode sheet (3).
7. The pre-lithium battery cell processing apparatus of claim 1, further comprising: and a positive electrode reel (40) adapted to wind the positive electrode sheet (4).
8. The processing device of the pre-lithium battery cell according to claim 6 or 7, wherein the cutting unit (60) is further adapted to cut the negative electrode tab (3) and the positive electrode tab (4).
9. The pre-lithium battery cell processing apparatus of claim 1, further comprising: the lamination mechanism (50) is suitable for sequentially laminating the first laminating unit (7), the negative pole piece (3), the second laminating unit (8) and the positive pole piece (4) from top to bottom.
10. A pre-lithium cell processing system, comprising a pre-lithium cell processing apparatus according to any of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122383660.0U CN215896485U (en) | 2021-09-29 | 2021-09-29 | Pre-lithium cell processing device and pre-lithium cell processing system |
| PCT/CN2022/107180 WO2023050982A1 (en) | 2021-09-29 | 2022-07-21 | Pre-lithiation battery core processing device and pre-lithiation battery core processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202122383660.0U CN215896485U (en) | 2021-09-29 | 2021-09-29 | Pre-lithium cell processing device and pre-lithium cell processing system |
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| CN215896485U true CN215896485U (en) | 2022-02-22 |
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| WO (1) | WO2023050982A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023050982A1 (en) * | 2021-09-29 | 2023-04-06 | 蜂巢能源科技股份有限公司 | Pre-lithiation battery core processing device and pre-lithiation battery core processing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116207330B (en) * | 2023-05-05 | 2023-08-22 | 广东捷盟智能装备有限公司 | Manufacturing equipment and manufacturing method of solid-state battery micro-battery core |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018186561A1 (en) * | 2017-04-03 | 2018-10-11 | 주식회사 엘지화학 | Pre-lithiation apparatus, method for manufacturing negative electrode part using same, and negative electrode part |
| CN111162246B (en) * | 2018-11-08 | 2021-01-26 | 中国科学院化学研究所 | Continuous controllable pre-lithiation system and lithium supplementing method |
| CN209169291U (en) * | 2018-12-29 | 2019-07-26 | 蜂巢能源科技有限公司 | The pre- lithium device of pole piece |
| CN112151283B (en) * | 2019-06-28 | 2022-08-23 | 天津中能锂业有限公司 | Lithium ion capacitor negative electrode prelithiation method, composite negative electrode and lithium ion capacitor |
| CN210456758U (en) * | 2019-07-09 | 2020-05-05 | 宁德时代新能源科技股份有限公司 | Coiling mechanism and pole piece lithium supplementing equipment |
| CN111883737A (en) * | 2020-07-15 | 2020-11-03 | 溧阳聚阳智能科技有限公司 | Integrated pole piece lithium supplementing system |
| CN215896485U (en) * | 2021-09-29 | 2022-02-22 | 蜂巢能源科技有限公司 | Pre-lithium cell processing device and pre-lithium cell processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023050982A1 (en) * | 2021-09-29 | 2023-04-06 | 蜂巢能源科技股份有限公司 | Pre-lithiation battery core processing device and pre-lithiation battery core processing system |
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