CN210224168U - Lithium ion battery pole piece prelithiation device - Google Patents
Lithium ion battery pole piece prelithiation device Download PDFInfo
- Publication number
- CN210224168U CN210224168U CN201921078314.8U CN201921078314U CN210224168U CN 210224168 U CN210224168 U CN 210224168U CN 201921078314 U CN201921078314 U CN 201921078314U CN 210224168 U CN210224168 U CN 210224168U
- Authority
- CN
- China
- Prior art keywords
- pole piece
- module
- lithiation
- roller
- ion battery
- 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.)
- Active
Links
Images
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
Abstract
The utility model discloses a lithium ion battery pole piece lithiation device in advance, including consecutive unreel the module, presoak moist module, lithiation module, washing module, dry module and rolling module in advance to and adjust the tension and the pole piece buffer of pole piece operation between each module. The device can complete the continuous pre-lithium supplement of the lithium ion battery pole piece roll-to-roll by a wet electrochemical method, has high production efficiency and high production reliability, is not easy to damage the pole piece, can accurately control and adjust the lithium supplement amount by current and the running speed of the pole piece, and is suitable for large-scale production. The lithium supplementing device is suitable for pole pieces made of various materials, and is compatible with various lithium ion battery preparation processes such as multi-pole-lug winding, full-pole-lug winding and lamination. The lithium ion battery prepared by the electrode plate pre-lithiated by the device has higher first efficiency, and the capacity, specific energy and cycle performance are also obviously improved.
Description
Technical Field
The invention relates to the technical field of lithium ion secondary batteries, in particular to a prelithiation device for a lithium ion battery pole piece.
Background
Lithium ion secondary batteries have the advantages of high voltage, high energy density and the like, are widely applied to power supplies of consumer electronics, energy storage systems and power systems, and the improvement of the energy density of lithium ion batteries is a most concerned problem in the industry and the academia all the time.
In the first charging process of the battery, a surface Solid Electrolyte Interface (SEI) film is formed on the surfaces of a positive electrode and a negative electrode, lithium is consumed, and the lithium is irreversibly solidified to carbonate, alkoxide, ester salt and the like of the lithium, so that the loss of reversible lithium is caused, the first efficiency is reduced, and the discharge capacity of the battery is reduced. Especially, when a novel negative electrode active material (such as a silicon-containing negative electrode) with high capacity is applied, the capacity loss during the first charging process is particularly obvious.
In order to compensate for the lithium loss of the SEI film formed by the first charging, the common technical scheme is to supplement lithium to the anode or the cathode of the battery. The wet electrochemical lithium supplement, namely the pre-charging of the electrode pole piece, is the most intuitive and common lithium supplement method, and compared with a lithium powder lithium supplement method (such as CN105190958A), the method has the advantages that the quantity of the wet electrochemical lithium supplement is quantitative and controllable, dangerous chemicals such as lithium powder or ultrathin lithium foil are not needed, and the like. For example, CN104201320A, CN105470465A, CN105845894A, etc., the main method is to slice the electrode to be prelithiated and put it into an electrolytic cell, and charge/discharge the electrode, such as lithium slice, to obtain the prelithiated electrode. However, such a method has disadvantages that the production efficiency is low, and the continuous production cannot be performed because the material needs to be put in, soaked, charged, taken out, and put in again; the pole piece is cut to generate a plurality of angular positions, so that the pole piece is easy to damage and fall off powder in the processes of carrying, putting in/taking out an electrolytic cell, drying and the like; the pole piece is directly placed in the solution, the front and the back are not fixed, and the distance between the pole piece and the counter electrode is difficult to control; when the size of the pole piece is large, the pole piece is easy to bend and curl, and the problem of nonuniform pre-lithiation caused by nonuniform current distribution is easy to occur.
Therefore, a lithium ion battery pole piece prelithiation device capable of roll-to-roll continuous production is needed.
Disclosure of Invention
The invention aims to: the utility model provides a lithium ion battery pole piece prelithiation device, through the method of wet process electrochemistry prelithiation, realizes roll-to-roll continuous production.
The invention provides a lithium ion battery pole piece pre-lithiation device, and in order to match the device, an electrode structure to be pre-lithiated is shown in figure 2, electrode active substances E1 and E2 are coated on a conductive foil E0 in a double-sided mode, and a blank foil E0 is reserved on one side or two sides for conducting. The electrode structure is suitable for multi-tab winding, full-tab winding or laminated batteries.
Fig. 1 is a functional structure diagram of the apparatus, the apparatus is divided into several parts, namely an a1 unreeling module, an a2 pre-wetting module, an A3 pre-lithiation module, an a4 washing module, an a5 drying module and an a6 reeling module, and a plurality of tension and pole piece buffering devices as shown in S1/S2/S3/S4/S5 are arranged in each module or between modules, so as to provide tension and make the operation speed of the pole piece in each module independently adjustable.
The core module is an A3 pre-lithiation module, as shown in figure 1, the module mainly comprises a V2 lithiation pool and pre-lithiation electrolyte arranged in the V2 lithiation pool, a R1 first lithiation roller, a R2 second lithiation roller, a R11 first electron transmission roller, a R21 second electron transmission roller, one or more S2 tension and pole piece buffer devices and other guide rollers, wherein an electrode pole piece and the R1R2 are completely immersed in the pre-lithiation electrolyte in the V2 lithiation pool, and the whole module is arranged in a protective atmosphere with low dew point or inert gas. The prelithiation electrolyte solvent of the lithiation pool is organic liquid such as carbonic ester, carboxylic ester, ether and ketone, and contains lithium salt such as LiPF6 with a certain concentration and appropriate additives.
The cross-sectional views of the R1 and R2 lithiated rolls are shown in fig. 3 and consist of at least three layers. The first layer L11/L21 is a diaphragm layer, L11/L21 is made of a porous insulating material and plays a role in allowing lithium ions to pass through and isolating electron transmission, the specific material can be a polymer porous membrane or a ceramic porous membrane or a composite porous membrane of polymer and ceramic, the porosity is 20-80%, and the thickness is 5-100 microns. The second layer L12/L22 is a lithium-containing layer, and L12/L22 is made of a material containing lithium and conducting electricity, so as to allow lithium ions to pass through and also allow electrons to pass through, and the specific material can be a composite film of lithium metal, lithium metal powder, polymer and/or ceramic, conducting carbon, a composite film of a lithium-containing compound (such as lithium cobaltate, lithium manganate, lithium nickel cobalt manganese, lithium iron phosphate and the like), polymer and conducting carbon, and the thickness of the composite film is 30-500 μm. The third layer L13/L23 is a conductive layer, is made of a metal which does not react with lithium, is resistant to corrosion, and has good conductivity, and functions to transport electrons, and specifically, may be made of a material such as stainless steel, nickel, a nickel alloy, titanium, or a titanium alloy.
R11 and R21 are electron transport rollers, and the structure thereof is shown in fig. 4, and mainly function to pinch the electrode foil and conduct electrons by the electrode foil E0. R11 and R21 are both composed of two parts, one part is R111 and R211 which are made of corrosion-resistant metal with good conductivity, the electrode foil E0 is clamped, the second part is R112 and R212, the surface is made of non-conductive materials such as ceramics, rubber, plastics and the like, the electrode foil is used for clamping the electrode coating part, and the electrode foil plays roles in stabilizing the electrode sheet and preventing shaking.
Fig. 5 is a schematic diagram of a pre-lithiation module circuit structure. The first lithiation roller, the first current and voltage control device, the first active material layer of the electrode, the current collector of the electrode, the first electron transmission roller and the pre-lithiation solution in the first electron transmission roller are connected through a circuit to form a first electron and ion loop; the second lithiation roller, the second current and voltage control device, the second electrode active material layer, the electrode current collector, the second electron transmission roller and the pre-lithiation solution in the second electron transmission roller are connected through a circuit to form a second electron and ion loop. In operation, lithium ions are inserted into the electrode active material E1 layer from the L12 layer through the L11 layer, and accordingly, electrons reach the electrode active material E1 layer from the L12 layer through an external circuit of L13, R111 and E0, and the lithium insertion amount is controlled by the first current-voltage control device C1; correspondingly, lithium ions are inserted into the electrode active material E2 layer from the L22 layer through the L21 layer, and accordingly, electrons reach the electrode active material E2 layer from the L22 layer through an external circuit of L23, R211 and E0, and the lithium insertion amount is controlled by a second current-voltage control device C2; meanwhile, in order to avoid the non-uniform degree of pre-lithiation on both sides of the electrode, a double-side current-voltage balance control device C3 controls the voltage balance of the two circuits.
During operation, the current passing through the first current-voltage control device C1 is I1, the current passing through the second current-voltage control device C2 is I2, the width of an active material of an electrode piece is w, the linear speed of the electrode piece in the A3 module is v3, the pre-embedded lithium amount on the electrode with the unit area of E1 is I1/(w × v3), and the pre-embedded lithium amount on the electrode with the unit area of E2 is I2/(w × v 3). The current level and the speed of the electrode sheet can be adjusted according to different electrode designs, battery capacities, electrode widths, electrode materials and expected prelithiation degrees.
In order to fully prelithiate the electrode or increase the prelithiation speed, a plurality of A3 prelithiation modules may be arranged, or a plurality of sets of lithiation rollers R1 and R2 and a plurality of sets of electron transport rollers R11 and R21 may be arranged in one A3 prelithiation module. The current for the sets of lithiation rollers and electron transport rollers can be independently controlled. The prelithiation module may have a heating function to accelerate lithium ion diffusion.
A1 is an unwinding module, which is composed of an unwinding roller R1 and a tension and pole piece buffering device S1, and plays the role of unwinding and controlling the running speed of the pole piece.
A2 is a pre-wetting module consisting of a wetting tank V1, electrolyte in the wetting tank and corresponding guide rollers, and the electrode plate is immersed in the electrolyte in the wetting tank. Because the lithium ion battery electrode is generally a porous electrode, the electrolyte can be charged after entering the pores after the electrolyte is soaked for a certain time. In order to fully infiltrate the electrodes, a plurality of pre-infiltration modules can be arranged, and the infiltration modules can have a heating function to accelerate the infiltration speed of the electrolyte.
A4 is a cleaning module consisting of a cleaning pool V3, cleaning liquid in the cleaning pool, corresponding guide rollers and tension structures, and the electrode plate is immersed in the cleaning liquid in the cleaning pool. The cleaning module is mainly used for cleaning lithium salt, metal ions, falling powder and the like remained on the surface of the pole piece, and the cleaning solution comprises organic solution of carbonic ester, carboxylic ester, ether, ketone and the like and corresponding additives. In order to fully clean the electrodes, a plurality of cleaning modules can be arranged, and the cleaning modules can have a heating function to improve the solubility of lithium salts.
A5 is a drying module consisting of a heating unit T1, corresponding guide rollers and a tension mechanism. The main function is to dry the residual organic liquid on the surface of the pole piece. The heating device T1 may be one or a combination of a plurality of heating methods such as radiation heating, microwave heating, or hot air heating. In order to dry the electrodes sufficiently, a plurality of drying modules may be arranged.
A6 is a winding module, which is composed of a winding roller R4 and a tension and pole piece buffer device S5, and plays the role of winding and controlling the running speed of the pole piece.
Compared with the prior art, the device can complete the continuous pre-lithium supplement of the lithium ion battery pole piece roll-to-roll by a wet electrochemical method, has high production efficiency and high production reliability, is not easy to damage the pole piece, can accurately control and adjust the lithium supplement amount by current and the running speed of the pole piece, and is suitable for large-scale production. The lithium supplementing device is suitable for pole pieces made of various materials, and is compatible with various lithium ion battery preparation processes such as multi-pole-lug winding, full-pole-lug winding and lamination. The lithium ion battery prepared by the electrode plate pre-lithiated by the device has higher first efficiency, and the capacity, specific energy and cycle performance are also obviously improved.
Drawings
FIG. 1: and the functional structure of the equipment is shown schematically.
FIG. 2: pre-lithiated electrode schematic.
FIG. 3: lithiation roller R1 and R2 are schematic in cross-sectional structure.
FIG. 4: the electron transport rollers R11 and R21 are schematically shown in structure.
FIG. 5: schematic diagram of the prelithiation circuit structure.
Description of the labeling:
a1 unwinding module;
a2 pre-soaking module;
a3 prelithiation module;
a4 cleaning module;
a5 drying module;
a6 rolling module;
v1 immersion pool;
a V2 lithiation bath;
v3 cleaning pool;
S1/S2/S3/S4/S5 tension and buffer device;
t1 heating baking device;
e0 electrode foil;
e1 electrode first active material layer;
e2 electrode second active material layer;
r1 first lithiation roller;
r2 second lithiation roller;
an L11 first lithiated rolling separator layer;
l12 first lithiated roll lithium-containing layer;
an L13 first lithiated roller conductive layer;
an L21 second lithiated rolling separator layer;
l22 second lithiated roll lithium containing layer;
an L23 second lithiated roller conductive layer;
r11 first electron transport roller;
r21 second electron transport roller;
r111 first electron transport roller conductive module;
r112 first electron transfer roller insulating clamping module;
r211 a second electron transport roller conductive module;
r212 second electron transport roller insulating clamping module;
r3 unwind roll;
r4 wind-up roll;
c1 first current-voltage control means;
c2 second current-voltage control means;
c3 double-sided current-voltage balance control device.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Description of typical cell manufacture:
preparing a positive pole piece: and (2) stirring and pulping Lithium Cobaltate (LCO), PVDF and Super-P at a weight ratio of 96:2:2, coating the two sides of the positive electrode slurry on a positive electrode current collector, and drying, compacting, slitting and cutting into pieces to obtain the positive electrode piece.
Preparing a negative pole piece: adding artificial graphite (or containing silicon, silicon alloy, silicon-carbon composite, silicon oxide, or tin, tin alloy and tin oxide), Styrene Butadiene Rubber (SBR) and sodium carboxymethylcellulose (CMC) which are used as negative active materials into deionized water according to the required weight ratio of 96:2:2, stirring and homogenizing to prepare negative slurry; coating the negative electrode slurry on the negative electrode current collector on two sides to form a structure shown in figure 2, wherein a hollow foil is left on one side or two sides, and the designed capacity per unit area is 25Ah/m2And after drying, compacting and slitting, slitting to obtain an active material with the width of 71mm, carrying out pre-lithiation, and then carrying out slitting to obtain the negative pole piece.
Preparing a lithium ion battery: assembling the negative pole piece and the positive pole piece prepared by the process with a diaphragm, welding an outer tab to obtain a battery cell, putting the battery cell into an outer package, injecting electrolyte into the battery cell, sealing, pre-charging, and forming to obtain the lithium ion secondary battery.
A typical electrode prelithiation specification:
the structure of the prelithiation device of the present invention is shown in fig. 1.
In R1 and R2, L11 and L21 are composite films of polypropylene, polyethylene and aluminum oxide with the thickness of 50 microns and the porosity of 50%, and L12 and L22 are composite films of lithium manganate with the thickness of 110 microns, conductive carbon black and PVDF with the proportion of 94:3: 3.
And injecting electrolyte into the V1 and the V2, wherein the electrolyte comprises the following solvent components in percentage by weight: EC: PC: DEC: EP 15:5:30: 50; in additionIn addition, the electrolyte contains 1.3M LiPF6And corresponding additives.
Injecting a cleaning solution into the V3, wherein the cleaning solution comprises the following components in percentage by weight: EC: PC: DEC: EP 10:5:30: 55.
T1 is a hot air blast drying oven, and the temperature of the hot air is 80 ℃.
And threading the coiled negative pole piece which is cut into the structure of the figure 2 on a prelithiation device of the invention, and clamping the empty foil position of the conductive foil E0 on R111 and R211.
The currents passing through the first current-voltage control device C1 and the second current-voltage control device C2 are I, the width of the electrode pole piece is w, the linear speed of the electrode pole piece in the A3 module is controlled to be v3, and the L13 and the L23 are in short circuit connection through the C3 to keep the voltages of the two consistent.
Comparative example 1:
preparing a negative pole piece: adding artificial graphite, Styrene Butadiene Rubber (SBR) and sodium carboxymethylcellulose (CMC) serving as negative active materials into deionized water according to the required weight ratio of 96:2:2, stirring and homogenizing to prepare negative slurry; coating the negative electrode slurry on the negative electrode current collector on two sides, wherein the designed capacity per unit area is 25Ah/m2And after drying, compacting and slitting, the slit active material has a width of 71mm, and the negative pole piece is obtained after slitting without pre-lithiation.
Other items are the same as the typical battery manufacturing description.
Comparative example 2:
preparing a negative pole piece: adding artificial graphite serving as a negative electrode active material, a silicon-oxygen negative electrode material, Styrene Butadiene Rubber (SBR) and sodium carboxymethyl cellulose (CMC) into deionized water according to the required weight ratio of 40:56:2:2, stirring and homogenizing to prepare negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector on two sides, wherein the designed capacity per unit area is 25Ah/m2And after drying, compacting and slitting, the slit active material has a width of 71mm, and the negative pole piece is obtained after slitting without pre-lithiation.
Other items are the same as the typical battery manufacturing description.
Example 1:
preparing a negative pole piece: negative electrode activityAdding artificial graphite, Styrene Butadiene Rubber (SBR) and sodium carboxymethylcellulose (CMC) into deionized water according to the required weight ratio of 96:2:2, stirring and homogenizing to prepare negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector on two sides, wherein the designed capacity of the single side per unit area is 25Ah/m2And after drying, compacting and slitting, slitting to obtain an active material with the width of 71mm, carrying out pre-lithiation, and cutting into pieces after pre-lithiation to obtain the negative pole piece.
And (3) pre-lithiation process: the current passing through the first current-voltage control device C1 and the second current-voltage control device C2 is 6A, the width of an active substance of the electrode piece is 71mm, the running linear speed of the electrode piece in the A3 module is controlled to be 1.4m/min, and the L13 and the L23 are in short circuit through the C3 to keep the voltages of the two consistent.
Other items are the same as the typical battery manufacturing description.
Example 2:
preparing a negative pole piece: adding artificial graphite serving as a negative electrode active material, a silicon-oxygen negative electrode material, Styrene Butadiene Rubber (SBR) and sodium carboxymethyl cellulose (CMC) into deionized water according to the required weight ratio of 40:56:2:2, stirring and homogenizing to prepare negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector on two sides, wherein the designed capacity of the single side per unit area is 25Ah/m2And after drying, compacting and slitting, slitting to obtain an active material with the width of 71mm, carrying out pre-lithiation, and cutting into pieces after pre-lithiation to obtain the negative pole piece.
And (3) pre-lithiation process: the current passing through the first current-voltage control device C1 and the second current-voltage control device C2 is 6A, the width of an active substance of the electrode piece is 71mm, the running linear speed of the electrode piece in the A3 module is controlled to be 0.7m/min, and the L13 and the L23 are in short circuit through the C3 to keep the voltages of the two consistent.
Other items are the same as the typical battery manufacturing description.
Example 3:
preparing a negative pole piece: adding artificial graphite serving as a negative electrode active material, a silicon-oxygen negative electrode material, Styrene Butadiene Rubber (SBR) and sodium carboxymethyl cellulose (CMC) into deionized water according to the required weight ratio of 40:56:2:2, stirring and homogenizing to prepare negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector on two sidesThe design capacity per unit area of the single face is 25Ah/m2And after drying, compacting and slitting, slitting to obtain an active material with the width of 71mm, carrying out pre-lithiation, and cutting into pieces after pre-lithiation to obtain the negative pole piece.
And (3) pre-lithiation process: the current passing through the first current-voltage control device C1 and the second current-voltage control device C2 is 6A, the width of an active substance of the electrode piece is 71mm, the running linear speed of the electrode piece in the A3 module is controlled to be 0.47m/min, and the L13 and the L23 are in short circuit through the C3 to keep the voltages of the two consistent.
Other items are the same as the typical battery manufacturing description.
Example 4:
preparing a negative pole piece: adding artificial graphite serving as a negative electrode active material, a silicon-oxygen negative electrode material, Styrene Butadiene Rubber (SBR) and sodium carboxymethyl cellulose (CMC) into deionized water according to the required weight ratio of 40:56:2:2, stirring and homogenizing to prepare negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector on two sides, wherein the designed capacity of the single side per unit area is 25Ah/m2And after drying, compacting and slitting, slitting to obtain an active material with the width of 71mm, carrying out pre-lithiation, and cutting into pieces after pre-lithiation to obtain the negative pole piece.
And (3) pre-lithiation process: the current passing through the first current-voltage control device C1 and the second current-voltage control device C2 is 6A, the width of an active substance of the electrode piece is 71mm, the running linear speed of the electrode piece in the A3 module is controlled to be 0.35m/min, and the L13 and the L23 are in short circuit through the C3 to keep the voltages of the two consistent.
Other items are the same as the typical battery manufacturing description.
Example 5:
preparing a negative pole piece: adding artificial graphite serving as a negative electrode active material, a silicon-oxygen negative electrode material, Styrene Butadiene Rubber (SBR) and sodium carboxymethyl cellulose (CMC) into deionized water according to the required weight ratio of 40:56:2:2, stirring and homogenizing to prepare negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector on two sides, wherein the designed capacity of the single side per unit area is 25Ah/m2And after drying, compacting and slitting, slitting to obtain an active material with the width of 71mm, carrying out pre-lithiation, and cutting into pieces after pre-lithiation to obtain the negative pole piece.
And (3) pre-lithiation process: the current passing through the first current-voltage control device C1 and the second current-voltage control device C2 is 9A, the width of an active substance of the electrode piece is 71mm, the linear speed of the electrode piece in the A3 module is controlled to be 0.525m/min, and the C3 enables the L13 and the L23 to be in short circuit to keep the voltages of the two consistent.
Other items are the same as the typical battery manufacturing description.
And (3) analyzing an experimental result:
TABLE 1 Capacity, first efficiency, energy density, 500 cycles Capacity Retention ratio data for comparative examples and examples.
Table 1 shows the experimental results of comparative example and example, which are average data of 50 cells. Compared with the comparative battery example, the device can be used for continuously pre-supplementing lithium for the lithium ion battery pole piece roll-to-roll by a wet electrochemical method, and the lithium supplementing amount can be accurately controlled and adjusted by current and the running speed of the pole piece, so that the device is suitable for large-scale production. The lithium ion battery prepared by the electrode pole piece pre-lithiated by the device has higher first efficiency, and the capacity, specific energy and cycle performance are obviously improved, and particularly for the silicon-containing negative pole piece, the improvement is more obvious.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. A lithium ion battery pole piece prelithiation device which characterized in that: the device comprises an unreeling module, a pre-wetting module, a pre-lithiation module, a cleaning module, a drying module and a reeling module which are sequentially connected, and a tension and pole piece buffering device for adjusting the running of pole pieces among the modules; the unwinding module comprises an unwinding roller and a tension and pole piece buffer device; the pre-soaking module comprises a soaking pool and a guide roller; the pre-lithiation module comprises a lithiation pool, a first lithiation roller, a second lithiation roller, a first electron transmission roller, a second electron transmission roller, a first current and voltage control device, a second current and voltage control device, a tension and pole piece buffer device and a guide roller; the cleaning module comprises a cleaning pool, a tension and pole piece buffer device and a guide roller; the drying module comprises a heating device, a tension and pole piece buffering device and a guide roller; the winding module comprises a tension and pole piece buffer device and a winding roller.
2. The lithium ion battery pole piece prelithiation device of claim 1, characterized in that: the first lithiation roller and the second lithiation roller are positioned in a lithiation pool.
3. The lithium ion battery pole piece prelithiation device of claim 1, characterized in that: the pre-lithiation module is provided with a double-sided current-voltage balance control device for controlling the voltage balance of the first current-voltage control device and the second current-voltage control device.
4. The lithium ion battery pole piece prelithiation device of claim 1, characterized in that: and continuously arranging a plurality of pre-lithiation modules, or arranging a plurality of groups of first lithiation rollers, second lithiation rollers and a plurality of groups of first electron transmission rollers and second electron transmission rollers in one pre-lithiation module.
5. The lithium ion battery pole piece prelithiation device of claim 1, characterized in that: the first lithiation roller and the second lithiation roller are both composed of at least three layers: the first layer is a diaphragm layer made of porous insulating material; the second layer is a lithium-containing layer made of a lithium-containing and electrically conductive material; the third layer is a conductive layer made of a metal which does not react with lithium, is resistant to corrosion, and has good conductivity.
6. The lithium ion battery pole piece prelithiation device of claim 1, characterized in that: a plurality of pre-soaking modules are continuously arranged, and the soaking modules are provided with heating devices.
7. The lithium ion battery pole piece prelithiation device of claim 1, characterized in that: the first electron transmission roller and the second electron transmission roller are respectively composed of two parts: the first part is an electronic transmission roller conductive module which is made of corrosion-resistant metal with good conductivity and used for clamping an electrode foil; the second part is an electronic transmission roller insulating clamping module, the surface of which is made of non-conductive material and is used for clamping the electrode coating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921078314.8U CN210224168U (en) | 2019-07-11 | 2019-07-11 | Lithium ion battery pole piece prelithiation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921078314.8U CN210224168U (en) | 2019-07-11 | 2019-07-11 | Lithium ion battery pole piece prelithiation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210224168U true CN210224168U (en) | 2020-03-31 |
Family
ID=69936995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921078314.8U Active CN210224168U (en) | 2019-07-11 | 2019-07-11 | Lithium ion battery pole piece prelithiation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210224168U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110335992A (en) * | 2019-07-11 | 2019-10-15 | 安普瑞斯（无锡）有限公司 | A kind of electrodes of lithium-ion batteries prelithiation device |
| CN113078364A (en) * | 2021-03-29 | 2021-07-06 | 中南大学 | Manufacturing method of high-energy-density aluminum-shell lithium ion battery |
-
2019
- 2019-07-11 CN CN201921078314.8U patent/CN210224168U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110335992A (en) * | 2019-07-11 | 2019-10-15 | 安普瑞斯（无锡）有限公司 | A kind of electrodes of lithium-ion batteries prelithiation device |
| CN113078364A (en) * | 2021-03-29 | 2021-07-06 | 中南大学 | Manufacturing method of high-energy-density aluminum-shell lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103413904B (en) | A kind of manufacture method of diaphragm for polymer lithium ion battery | |
| CN109103496A (en) | A kind of long storage life lithium ion battery and preparation method thereof | |
| CN110335992A (en) | A kind of electrodes of lithium-ion batteries prelithiation device | |
| CN104538591B (en) | Pre-lithiation method of lithium ion battery negative electrode material | |
| CN111162246B (en) | Continuous controllable pre-lithiation system and lithium supplementing method | |
| CN107658428B (en) | Lithium ion battery negative electrode piece lithium supplementing device and lithium supplementing method | |
| CN105470564A (en) | Solid electrolyte membrane, preparation method of solid electrolyte membrane and lithium ion battery | |
| WO2014032407A1 (en) | Silicon negative electrode pole piece of lithium ion battery and preparation method thereof, and lithium ion battery | |
| CN109524621A (en) | A kind of prelithiation method and device for the lithium ion battery negative electrode that prelithiation degree is controllable | |
| CN113036069B (en) | Method for improving capacity and stability of lithium battery, coating device and application | |
| CN210224168U (en) | Lithium ion battery pole piece prelithiation device | |
| CN112635915A (en) | Modified diaphragm for metal lithium cathode and preparation method and application thereof | |
| CN115101710B (en) | Pre-lithiated lithium ion battery electrode and preparation system, method and application thereof | |
| CN112038568A (en) | Preparation method and continuous production equipment of controllable cathode pre-embedded lithium | |
| CN107565088A (en) | A kind of preparation method of lithium metal secondary battery negative pole | |
| CN103545473A (en) | Device and method for preparing integrated lithium battery polar plate diaphragm | |
| CN109244370B (en) | Preparation method of secondary lithium metal battery cathode steam protective film | |
| CN113764667B (en) | Lithium supplementing functional electrolyte membrane for solid lithium battery | |
| CN202888313U (en) | Device for processing anode strip of lithium ion battery | |
| CN207398276U (en) | A kind of two-sided benefit lithium device of lithium ion battery negative electrode | |
| CN207542319U (en) | Lithium ion battery negative electrode mends lithium device | |
| CN103746146A (en) | Cathode module and lithium battery applying same | |
| WO2023236152A1 (en) | Secondary battery, battery module comprising secondary battery, battery pack, and electric device | |
| CN202888314U (en) | Device for processing anode strip of lithium ion battery | |
| CN115863779A (en) | Method for inactivating positive electrode of lithium ion battery and lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |