CN107359307B - Lithium ion battery pole piece lithium supplementing device - Google Patents
Lithium ion battery pole piece lithium supplementing device Download PDFInfo
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- CN107359307B CN107359307B CN201710451537.3A CN201710451537A CN107359307B CN 107359307 B CN107359307 B CN 107359307B CN 201710451537 A CN201710451537 A CN 201710451537A CN 107359307 B CN107359307 B CN 107359307B
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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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
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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
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
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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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to the technical field of pole piece processing devices, and particularly relates to a lithium supplement device for a lithium ion battery pole piece, which comprises a pole piece unreeling device, a pole piece reeling device, a metal lithium cold pressing device and a metal lithium supply device, wherein the metal lithium supply device is arranged between the pole piece unreeling device and the pole piece reeling device, the metal lithium cold pressing device is arranged between the metal lithium supply device and the pole piece reeling device, and the metal lithium supply device is arranged as an extrusion type metal lithium supply device. The invention can efficiently, quantitatively and uniformly process the pole pieces, has simple structure, low cost and relatively low requirement on environment, and realizes industrialized mass production and supply.
Description
The application is a divisional application of patent application with the application number of 201310461257.2, the application date of 2013, 10 and 8 months and the invention name of a lithium ion battery pole piece lithium supplementing device.
Technical Field
The invention belongs to the technical field of pole piece processing devices, and particularly relates to a lithium ion battery pole piece lithium supplementing device.
Background
Since the commercialization of lithium ion battery materials by the company sony of japan, lithium ion batteries have been rapidly popularized and applied in the field of portable electronic products such as portable mobile power sources, mobile phones, portable computers, cameras and video cameras, and have an important position in the field of energy, due to their advantages of light weight, high voltage, small volume, no memory effect, high specific energy, long cycle life, environmental friendliness, and the like.
With the continuous expansion of the application field of lithium ion batteries, various products have higher and higher requirements on the performance of the lithium ion batteries. For example, miniaturization of portable electronic products requires a longer service life of the lithium ion battery, and thus, higher and higher requirements are placed on the energy density of the lithium ion battery. For the existing negative electrode material, not only a part of lithium ions from the positive electrode material are consumed due to the formation of a solid electrolyte film (SEI film) in the first charging process, but also a part of lithium ions are irreversibly extracted from the negative electrode material, so that the first coulombic efficiency of the lithium ion battery cannot reach 100%, for example, the first coulombic efficiency of a graphite material is about 90%, and the first coulombic efficiency of other negative electrode materials such as a silicon negative electrode material is only 65-85% although the specific capacity is higher. Therefore, if lithium ions in the positive electrode material lost in the negative electrode material can be additionally replenished, the energy density of the lithium ion battery can be greatly increased.
One method of adding lithium is to add a part of lithium metal to the electrode sheet before preparing the battery cell, for example, in the chinese patent application No. 201210237240, the expensive lithium metal powder is attached to the electrode sheet by applying voltage and vibration, and then the lithium-added electrode sheet is prepared by cold pressing. In the application, the lithium supplementing process of attaching the metal lithium powder to the pole piece needs high-precision equipment, the method is mainly realized through electrostatic vibration, the uniformity is difficult to ensure, the lithium supplementing amount is difficult to monitor, meanwhile, the method has extremely high requirements on the environment, the scattered metal lithium powder needs to be placed in special equipment for treatment, and the efficiency is low.
Because continuous thin metal lithium belts are difficult to manufacture under the current technical conditions, and the thin metal lithium is difficult to attach to the pole piece due to poor mechanical properties of the metal lithium, if the metal lithium is attached to the pole piece by adopting a vacuum evaporation method, the production efficiency of the mechanism is low, the requirement of mass production is difficult to meet, and meanwhile, the evaporation method requires high control precision and wastes the metal lithium seriously.
Disclosure of Invention
The invention aims to: aiming at the defects of the prior art, the lithium ion battery pole piece lithium supplementing device is provided, and the device can be used for quickly, efficiently, uniformly and quantitatively attaching metal lithium to the pole piece of the lithium ion battery.
In order to achieve the purpose, the invention adopts the following technical scheme: lithium ion battery pole piece mends lithium device, including pole piece unwinding device, pole piece coiling mechanism, metal lithium device and the metal lithium feeding mechanism of colding pressing, the metal lithium feeding mechanism set up in between pole piece unwinding device and the pole piece coiling mechanism, the metal lithium device of colding pressing set up in the metal lithium feeding mechanism with between the pole piece coiling mechanism, the metal lithium feeding mechanism sets up to extrusion formula metal lithium feeding mechanism.
Extrusion formula lithium metal feeding mechanism includes booster mechanism, pressure drive mechanism, lithium metal filament extrusion head and lithium metal filament extrusion shell, lithium metal filament extrusion head set up in the lithium metal filament extrusion shell, and lithium metal filament extrusion head passes through pressure drive mechanism with booster mechanism connects, the bottom of lithium metal filament extrusion shell is provided with the extrusion mouth.
The extrusion type metal lithium supply device further comprises a metal lithium cooling mechanism, and the metal lithium wire extrusion shell is arranged in the metal lithium cooling mechanism.
The metal lithium cooling mechanism is an air cooling type metal lithium cooling mechanism or a liquid cooling type metal lithium cooling mechanism.
The metal lithium wire extrusion head is hermetically connected with the pressure increasing mechanism through the pressure transmission mechanism.
The supercharging mechanism is set to be a pneumatic supercharging mechanism, a hydraulic supercharging mechanism or an electric supercharging mechanism.
The pole piece unwinding device comprises an unwinding roller, an unwinding tension adjusting roller, a positioning roller and a first driving roller which are sequentially arranged, and the extrusion nozzle is arranged corresponding to the first driving roller.
The pole piece winding device comprises a protection baffle, a fixing frame, a deviation rectifying detector, a second transmission roller, a winding tension adjusting roller and a winding roller, wherein the deviation rectifying detector is arranged on the fixing frame, the protection baffle is arranged at the top of the fixing frame, the second transmission roller is arranged at the bottom of the fixing frame, and the winding tension adjusting roller is located between the second transmission roller and the winding roller.
The metal lithium cold pressing device comprises a cold pressing driving roller and a cold pressing driven roller arranged side by side with the cold pressing driving roller, and a gap is formed between the cold pressing driving roller and the cold pressing driven roller.
Compared with the prior art, the invention has at least the following advantages: 1) the preparation and lithium supplement processes of the metal lithium required by the battery cell are combined into a whole, wherein the lithium supplement process extrudes a metal lithium wire on a dried pole piece, and the lithium supplement process of the lithium ion battery pole piece is realized after cold pressing. The lithium supplementing device can supplement lithium in a low-humidity normal-temperature environment, and the requirement of a lithium supplementing process on the environment is greatly reduced. 2) The invention can change the extrusion head according to the requirement of the process, realize that the lithium supplement amount is controllable, if the double extrusion heads are adopted, the double-sided lithium supplement can be carried out simultaneously; the invention has simple structure and high production efficiency. 3) The lithium used by the invention is a metal lithium ingot, so the cost is low; the lithium ingot can be extruded at normal temperature, and the process is very simple; therefore, the industrial mass production is extremely easy to realize.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of fig. 1 at a.
The device comprises a pole piece unreeling device 1, a pole piece reeling device 2, a metal lithium cold pressing device 3, a metal lithium supply device 4, an unreeling roller 11, an unreeling tension adjusting roller 12, an unreeling tension adjusting roller 13, a positioning roller 14, a first driving roller 21, a protective baffle plate 22, a fixed frame 23, a deviation rectifying detector 24, a second driving roller 25, a reeling tension adjusting roller 25, a reeling roller 26, a reeling roller 31, a cold pressing driving roller 32, a cold pressing driven roller 41, a pressure boosting mechanism 42, a pressure driving mechanism 43, a metal lithium wire extrusion head 44, a metal lithium wire extrusion shell 45, a metal lithium cooling mechanism 46 and an extrusion nozzle 46.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and drawings of the specification, but the embodiments of the present invention are not limited thereto.
In embodiment 1, as shown in fig. 1, a lithium supplementing device for a lithium ion battery pole piece includes a pole piece unwinding device 1, a pole piece winding device 2, a lithium metal cold pressing device 3, and a lithium metal supply device 4, where the lithium metal supply device 4 is disposed between the pole piece unwinding device 1 and the pole piece winding device 2, the lithium metal cold pressing device 3 is disposed between the lithium metal supply device 4 and the pole piece winding device 2, the lithium metal supply device 4 is a squeezed lithium metal supply device, the squeezed lithium metal supply device includes a pressure mechanism 41, a pressure transmission mechanism 42, a lithium metal wire squeezing head 43, and a lithium metal wire squeezing shell 44, the lithium metal wire squeezing head 43 is disposed in the lithium metal wire squeezing shell 44, and the lithium metal wire squeezing head 43 is connected with the pressure transmission mechanism 41 through the pressure transmission mechanism 42, the lithium metal wire squeezing head 43 is made of a high-pressure-resistant metal material, and has a low adhesion with lithium metal through surface treatment, therefore, the lithium metal can be extruded more easily, the pressurizing mechanism 41 is a pneumatic pressurizing mechanism, the bottom of the lithium metal wire extruding shell 44 is provided with the extruding nozzle 46, the cross section of the extruding nozzle 46 is square, oval, round or trapezoidal, and the size of the extruding nozzle 46 can be set according to requirements. The lithium is supplemented to the pole piece by applying a certain force through the pressure transmission mechanism 42, so that the extrusion nozzle 46 can quantitatively and uniformly attach the metal lithium to the dried pole piece.
The extrusion type lithium metal supply device further comprises a lithium metal cooling mechanism 45, the lithium metal wire extrusion shell 44 is arranged in the lithium metal cooling mechanism 45, generally, the lithium metal cooling mechanism 45 is an air-cooling type lithium metal cooling mechanism, and the air-cooling type lithium metal cooling mechanism has a cooling effect on lithium metal in the extrusion process, so that the resistance caused by the adhesion between the lithium metal and the lithium metal wire extrusion head 43 is reduced.
Preferably, the lithium metal wire extrusion head 43 is hermetically connected with the pressurizing mechanism 41 through the pressure transmission mechanism 42, so that the uniformity of force in the lithium metal wire extrusion process is ensured.
The pole piece unreeling device 1 comprises an unreeling roller 11, an unreeling tension adjusting roller 12, a positioning roller 13 and a first driving roller 14 which are sequentially arranged, an extrusion nozzle 46 is arranged corresponding to the first driving roller 14, and metal lithium extruded by the extrusion nozzle 46 is attached to a pole piece on the first driving roller 14 through the driving of the first driving roller 14.
Pole piece coiling mechanism 2 is including protection baffle 21, mount 22, the detector 23 of rectifying, second driving roller 24, rolling tension adjusting roller 25 and wind-up roll 26, the detector 23 of rectifying sets up in mount 22, protection baffle 21 sets up in the top of mount 22, the effect of protection is played, second driving roller 24 sets up in the bottom of mount 22, rolling tension adjusting roller 25 is located between second driving roller 24 and the wind-up roll 26, can in time adjust the tension of rolling as required, when rectifying detector 23 detects the pole piece rolling and takes place the skew, wind-up roll 26 received signal will rectify, realize fine rolling effect.
The metal lithium cold pressing device 3 comprises a cold pressing driving roller 31 and a cold pressing driven roller 32 arranged in parallel with the cold pressing driving roller 31, the cold pressing driving roller 31 and the cold pressing driven roller 32 can be interchanged, the cold pressing driving roller 31 is not necessarily arranged above, the cold pressing driven roller 32 is definitely arranged below, the cold pressing driving roller 31 and the cold pressing driven roller 32 are subjected to surface treatment, the cohesiveness with metal lithium is reduced, a gap is formed between the cold pressing driving roller 31 and the cold pressing driven roller 32, the contact area between the metal lithium and a pole piece is realized through the size of the gap, the smaller the gap is, the better the cohesiveness between the corresponding metal lithium and the pole piece is, and the worse the cohesiveness is vice versa.
In a drying room, a baked lithium electrode sheet roll core to be compensated is placed on an unwinding roller 11 and sequentially penetrates through an unwinding tension adjusting roller 12, a positioning roller 13, a first driving roller 14, a metal lithium cold pressing device 3 (namely a cold pressing driving roller 31 and a cold pressing driven roller 32), a second driving roller 24, a winding tension adjusting roller 25 and a winding roller 26, wherein the unwinding roller 11, the unwinding tension adjusting roller 12, the positioning roller 13, the first driving roller 14, a protective baffle 21, a deviation rectifying detector 23, the second driving roller 24, the winding tension adjusting roller 25 and the winding roller 26 jointly act to realize the continuity of lithium compensation of the electrode sheet, the working efficiency is greatly improved, and the leveling and orderly stacking of a lithium compensation film roll are controlled. After the pole pieces are fixed, the pressurizing mechanism 41 starts to work, the pressure transmission mechanism 42 starts to work after the pressure is increased to extrude solid metal lithium in the metal lithium wire extrusion head 43, the pressed metal lithium starts to be extruded from the extrusion nozzle 46, the pole piece unwinding device 1, the pole piece winding device 2 and the metal lithium cold pressing device 3 start to work at the moment, the metal lithium wire is attached to the continuously moving pole piece after coming out of the metal lithium wire extrusion head 43, and the metal lithium wire is flattened after the pole piece attached with the metal lithium wire passes through the gap between the cold pressing driving roller 31 and the cold pressing driven roller 32, so that the increase of the lithium supplementing area is realized, and meanwhile, the good cohesiveness of the metal lithium and the pole pieces is realized. When the pressure transmission mechanism 42 starts to work, the lithium metal can rub the lithium metal wire extrusion head 43 to generate a large amount of heat, the heat can increase the binding force between the lithium metal and the lithium metal wire extrusion head 43, the change of the heat can lead to the increase of the fluidity and the increase of the reaction activity of the metal, and the lithium supplement amount is changed, and at the moment, the lithium metal cooling mechanism 45 is started to cool the lithium metal inside, so that the lithium supplement process is controllable. The lithium metal with different thicknesses and shapes can be obtained by controlling the shape of the lithium metal wire extrusion head 43, and the lithium supplement amount is adjusted.
Embodiment 2 differs from embodiment 1 in that: the lithium metal cooling mechanism 45 of the present embodiment is a liquid-cooled lithium metal cooling mechanism, and the liquid-cooled lithium metal cooling mechanism has a more significant cooling effect on the lithium metal, and the pressurizing mechanism 41 is a hydraulic pressurizing mechanism and is configured to be matched with the lithium metal cooling mechanism 45, so that the present invention has a simpler structure.
The other structures are the same as those of embodiment 1, and are not described here again.
The other structures are the same as those of embodiment 2, and are not described again here.
In summary, the following steps: by adopting the lithium ion battery pole piece lithium supplementing device, the pole pieces can be uniformly, quantitatively and efficiently treated; meanwhile, the invention integrates the two processes of preparing the metal lithium wire and supplementing lithium to the pole piece, the used metal lithium is a metal lithium ingot, and the pole piece is a pole piece which is baked after being coated, so the device has simple structure and low cost, and is easy to realize industrialized batch production.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (4)
1. Lithium ion battery pole piece mends lithium device, including pole piece unwinding device, pole piece coiling mechanism and metal lithium feeding mechanism, metal lithium feeding mechanism set up in pole piece unwinding device with between the pole piece coiling mechanism, its characterized in that: the metal lithium supply device is provided with a metal lithium cooling mechanism, the metal lithium supply device is provided as a squeeze-type metal lithium supply device,
the extrusion type lithium metal supply device comprises a lithium metal wire extrusion head used for extruding solid lithium metal in the lithium metal wire extrusion head,
the lithium ion battery pole piece lithium supplementing device further comprises a metal lithium cold pressing device, and the metal lithium cold pressing device is arranged between the metal lithium supply device and the pole piece winding device.
2. The lithium ion battery pole piece lithium supplementing device of claim 1, characterized in that: the metal lithium cooling mechanism is an air cooling type metal lithium cooling mechanism or a liquid cooling type metal lithium cooling mechanism.
3. The lithium ion battery pole piece lithium supplementing device of claim 1, characterized in that: the pole piece winding device comprises a protection baffle, a fixing frame, a deviation rectifying detector, a second transmission roller, a winding tension adjusting roller and a winding roller, wherein the deviation rectifying detector is arranged on the fixing frame, the protection baffle is arranged at the top of the fixing frame, the second transmission roller is arranged at the bottom of the fixing frame, and the winding tension adjusting roller is located between the second transmission roller and the winding roller.
4. The lithium ion battery pole piece lithium supplementing device of claim 1, characterized in that: the metal lithium cold pressing device comprises a cold pressing driving roller and a cold pressing driven roller arranged side by side with the cold pressing driving roller, and a gap is formed between the cold pressing driving roller and the cold pressing driven roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710451537.3A CN107359307B (en) | 2013-10-08 | 2013-10-08 | Lithium ion battery pole piece lithium supplementing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310461257.2A CN103545486B (en) | 2013-10-08 | 2013-10-08 | Electrodes of lithium-ion batteries mends lithium device |
| CN201710451537.3A CN107359307B (en) | 2013-10-08 | 2013-10-08 | Lithium ion battery pole piece lithium supplementing device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310461257.2A Division CN103545486B (en) | 2013-10-08 | 2013-10-08 | Electrodes of lithium-ion batteries mends lithium device |
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| Publication Number | Publication Date |
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| CN107359307A CN107359307A (en) | 2017-11-17 |
| CN107359307B true CN107359307B (en) | 2020-10-27 |
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| CN201310461257.2A Active CN103545486B (en) | 2013-10-08 | 2013-10-08 | Electrodes of lithium-ion batteries mends lithium device |
| CN201710451537.3A Active CN107359307B (en) | 2013-10-08 | 2013-10-08 | Lithium ion battery pole piece lithium supplementing device |
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| CN201310461257.2A Active CN103545486B (en) | 2013-10-08 | 2013-10-08 | Electrodes of lithium-ion batteries mends lithium device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025367B (en) * | 2016-07-14 | 2018-05-22 | 宁德时代新能源科技股份有限公司 | Calendering tectorial membrane mends lithium all-in-one |
| CN106364127B (en) * | 2016-09-20 | 2018-04-06 | 宁德时代新能源科技股份有限公司 | Intermittent double-sided film laminating device |
| CN106169557B (en) * | 2016-10-10 | 2018-10-26 | 宁德时代新能源科技股份有限公司 | Battery pole piece film covering device |
| CN108878779B (en) * | 2018-07-19 | 2020-10-27 | 安徽锂天下电子科技有限公司 | Lithium pre-doping device and method for electrode plate of lithium battery |
| CN110201848A (en) * | 2019-05-29 | 2019-09-06 | 深圳市倍特力电池有限公司 | The pole piece of lithium ion battery mends lithium system |
| CN110459731B (en) * | 2019-08-17 | 2021-06-22 | 珠海冠宇电池股份有限公司 | Lithium ion battery negative pole piece lithium supplementing device and lithium supplementing method |
| CN114937757B (en) * | 2022-03-08 | 2023-12-01 | 浙江南都电源动力股份有限公司 | Pole piece lithium supplementing device and lithium supplementing method |
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| CN1317842A (en) * | 2000-03-17 | 2001-10-17 | 索尼株式会社 | Method of mfg. battery |
| CN102779978A (en) * | 2012-07-10 | 2012-11-14 | 宁德新能源科技有限公司 | Device and method for replenishing lithium powder into lithium ion battery cathode sheet |
| CN202893867U (en) * | 2012-10-31 | 2013-04-24 | 成都航发液压工程有限公司 | Extruding drum of lithium metal extruder |
| CN203109194U (en) * | 2013-01-10 | 2013-08-07 | 程思明 | Continuous casting production line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101157076A (en) * | 2007-11-14 | 2008-04-09 | 中国乐凯胶片集团公司 | A pole piece coating method and coating nozzle |
| CN101632972A (en) * | 2009-08-14 | 2010-01-27 | 东莞新能源科技有限公司 | Lithium ion battery pole piece film coating device and film coating method |
| CN103208612B (en) * | 2013-03-25 | 2017-02-15 | 东莞新能源科技有限公司 | Continuous lithium powder replenishing method for both sides of lithium ion battery negative plate |
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2013
- 2013-10-08 CN CN201310461257.2A patent/CN103545486B/en active Active
- 2013-10-08 CN CN201710451537.3A patent/CN107359307B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317842A (en) * | 2000-03-17 | 2001-10-17 | 索尼株式会社 | Method of mfg. battery |
| CN102779978A (en) * | 2012-07-10 | 2012-11-14 | 宁德新能源科技有限公司 | Device and method for replenishing lithium powder into lithium ion battery cathode sheet |
| CN202893867U (en) * | 2012-10-31 | 2013-04-24 | 成都航发液压工程有限公司 | Extruding drum of lithium metal extruder |
| CN203109194U (en) * | 2013-01-10 | 2013-08-07 | 程思明 | Continuous casting production line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103545486A (en) | 2014-01-29 |
| CN103545486B (en) | 2017-07-18 |
| CN107359307A (en) | 2017-11-17 |
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