CN216120365U - Lithium cell prelithiation is with quick response transfer composite device - Google Patents
Lithium cell prelithiation is with quick response transfer composite device Download PDFInfo
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- CN216120365U CN216120365U CN202122664506.0U CN202122664506U CN216120365U CN 216120365 U CN216120365 U CN 216120365U CN 202122664506 U CN202122664506 U CN 202122664506U CN 216120365 U CN216120365 U CN 216120365U
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- roller
- bearing seat
- prelithiation
- lithium battery
- response transfer
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 48
- 230000004044 response Effects 0.000 title claims abstract description 20
- 239000002131 composite material Substances 0.000 title description 2
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 238000013329 compounding Methods 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000010030 laminating Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 239000013589 supplement Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 210000003739 neck Anatomy 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 239000011149 active material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000006138 lithiation reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
Disclosed is a quick response transfer combination device for lithium battery prelithiation, the transfer combination device comprising: a support; the double rollers consist of an upper roller and a lower roller which are arranged in parallel; an upper bearing seat for mounting the upper roller; a lower bearing seat for mounting the lower roller; the device comprises a pair of roller driving devices and a pressure thrust mechanism, wherein an upper bearing seat is fixedly connected with a support, a lower bearing seat is movably connected with the support, and the lower bearing seat can move along the vertical direction; the driving device is used for driving the upper roller and the lower roller to rotate; the pressure thrust mechanism is used for driving the lower roller to move along the vertical direction. The transfer laminating device can completely transfer and laminate the metal lithium layer on the battery pole piece, and realizes lithium supplement on the pole piece.
Description
Technical Field
The utility model relates to the technical field of battery manufacturing, in particular to a transfer combination device for pre-lithiation of a lithium battery.
Background
Lithium ion batteries have become one of the most widely used secondary batteries due to their advantages of high specific energy, small size and long cycle life. However, with the continuous development of high-power and high-energy devices such as electronic devices and electric vehicles, the demand for energy density of lithium ion batteries is higher and higher.
It has been proven that the energy density of a lithium ion battery can be effectively improved by coating lithium on a pole piece. The thickness of the lithium-on-pole piece is usually in the micron order, the lithium layer is attached to a film, and the lithium layer needs to be transferred from the film to the pole piece during lithium coating. At present, no special transfer laminating equipment exists, a common battery manufacturer uses a roller press for compacting pole pieces to perform transfer laminating work, the roller press is usually in a constant roll gap working state, the thickness sizes of the battery pole pieces and a lithium film have micrometer-level tolerance, so that when the roll gap is proper, part of the lithium layer is transferred from the film to the pole pieces, and the rest part of the lithium layer cannot be transferred to the pole pieces; when the roll gap is small, most of the lithium layer can be transferred to the pole piece, but the pole piece wrinkles seriously at some parts, so that the pole piece cannot be used.
In view of this, there is a strong need for a device suitable for transfer lamination of a lithium layer from a lithium film to a pole piece.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a novel quick-response transfer combination device for pre-lithiation of a lithium battery, which is simple and reliable in operation.
The purpose of the utility model can be realized by the following technical scheme.
A lithium battery prelithiation is with quick response transfer recombination device includes:
a support;
the double rollers consist of an upper roller and a lower roller which are arranged in parallel;
an upper bearing seat for mounting the upper roller;
a lower bearing seat for mounting the lower roller;
a pair roller driving device; and
the pressure thrust mechanism is arranged on the upper portion of the main body,
the upper bearing seat is fixedly connected with the bracket, and the lower bearing seat is movably connected with the bracket and can move along the vertical direction; the pair roller driving device is used for driving the upper roller and the lower roller to rotate; the pressure thrust mechanism is used for driving the lower roller to move along the vertical direction.
Optionally, the lower bearing seat comprises a bearing seat main body and needle roller plates, and the needle roller plates are arranged on two sides of the bearing seat main body; and a bearing seat lining plate is arranged on the support and opposite to the lower bearing seat, and the bearing seat lining plate is in contact with the needle roller plate on the bearing seat and is in rolling friction with the needle roller plate.
Optionally, the lower bearing seat is axially fixed by an end baffle assembly, an end baffle bearing is arranged in the end baffle assembly, and the bearing is in contact with the bearing seat and is in rolling friction with the bearing seat.
Optionally, the pair of rollers is a hollow structure.
Optionally, only the lower roller of the pair of rollers is of a hollow structure.
Optionally, the pair roller driving device comprises a motor and a speed reducer.
Optionally, the pair roller driving device comprises two sets of motors and speed reducers, and the motors and the speed reducers are respectively used for driving the upper roller and the lower roller.
Optionally, the pressure thrust mechanism is a servo hydraulic cylinder.
Optionally, the stand is of a detachable construction.
Optionally, the stent comprises a medial stent, a lateral stent, and connecting columns and connecting blocks for connecting the medial stent and the lateral stent.
Optionally, both the upper and lower rolls have an internal hollow structure, and smaller journals that meet strength requirements.
Optionally, the upper bearing housing is divided into an inner upper bearing housing and an outer upper bearing housing, both of which are journalled at both ends of the upper roller by bearings and then fixedly connected to the bracket.
Optionally, the lower bearing seat is divided into an inner lower bearing seat and an outer lower bearing seat, and the inner lower bearing seat and the outer lower bearing seat are both connected with the shaft necks at the two ends of the lower roller through bearings; the bearing seat further comprises a bearing seat main body and needle rolling plates, the needle rolling plates are arranged on two sides of the bearing seat main body, and the other sides of the needle rolling plates are in contact with bearing seat lining plates on the support.
Optionally, the upper roller is of a common solid structure, and the lower roller which only has the function of moving in the vertical direction is of a hollow structure, so that the characteristics of low weight and low inertia are ensured.
Optionally, the upper bearing seat and the lower bearing seat have smaller volume to meet the strength requirement, so the bearing seats also have the characteristics of low weight and low inertia.
Alternatively, only the roller moving in the vertical direction is of a hollow structure, and the bearing seat is of a small size, so that the roller bearing has the characteristics of low weight and low inertia.
The technical scheme of the utility model has at least one of the following advantages:
1. compared with a common constant roll gap roll squeezer, the wedge removing device adopts constant pressure control, so that the roll gap is perfectly matched with the material thickness, and the wedge removing device can be suitable for pole pieces and lithium films with different thicknesses and pole pieces and lithium films with larger tolerance ranges;
2. the pair roller is of a hollow structure, the bearing seat is of a small size, and the movable bearing seat is provided with a roller plate and a support, so that the movable bearing seat has small inertia and quick response;
3. in order to remove the pair rollers, the traditional roller press is usually large in support, and the pair rollers need to be removed from the inside of the support, so that material waste is caused; the utility model adopts the mode of dismantling the bracket, and breaks through the limitation of the roller diameter to the size of the bracket.
Drawings
FIG. 1 is a schematic, partially enlarged cross-sectional view of a representative pole piece.
FIG. 2 is a schematic diagram of a transfer lamination process.
Figure 3 is an isometric schematic view of a transfer manifold apparatus of the present invention.
FIG. 4 is a side view of the transfer apposition device of the present invention after dissection of the stent.
FIG. 5 is an isometric view of the outboard lower bearing mount of FIG. 3.
Description of the figure numbers:
active material at lower side of active material P2 at upper side of P-pole piece P0 current collector P1
Thick area of A pole piece, thin area of B pole piece, upper lithium film L2 lower lithium film of L1 upper lithium film
M1 upper film M2 lower film PL lithium-coated rear pole piece
100 rack 101 inner rack 102 outer rack 103 connecting column
104 connecting block 110 bearing block lining plate 200 roller 201 upper roller
202 lower roller 300 upper bearing seat 310 inner side upper bearing seat 320 outer side upper bearing seat
400 lower bearing seat 410 inboard lower bearing seat 420 outboard lower bearing seat 430 bearing seat baffle assembly
431 end baffle main body 432 end baffle bearing 433 bearing fixing shaft 401 bearing seat main body
402 needle plate 500 roller pair driving device 511 upper roller driving motor 512 upper roller speed reducer
521 lower roll driving motor 522 lower roll speed reducer 600 pressure thrust mechanism
Detailed Description
The following describes specific embodiments of the present invention. It is to be understood that other various embodiments can be devised and modified by those skilled in the art in light of the teachings of this disclosure without departing from the scope or spirit of the utility model. The following detailed description is, therefore, not to be taken in a limiting sense.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like are used only for convenience in describing the present invention and for simplicity in description, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic view showing a cross section of a pole piece in a partially enlarged manner, and fig. 2 is a schematic view showing a process of a transfer lamination process. The thickness of the pole piece P is usually between 100 and 200 μm, and the common tolerance is 1-5 μm; the lithium films (L1 and L2) are typically 20-70 μm thick, with the lithium layer typically 2-20 μm thick (the remainder being the support film), and the tolerance of the lithium films (L1 and L2) is typically 1-3 μm. Therefore, there is usually a certain variation in thickness at different positions of the pole piece P, as shown in fig. 1, the thick area a and the thin area B of the pole piece may appear several times in a certain length range of the pole piece, and the thickness difference between the thick area a and the thin area B of the pole piece may reach 3-5 μm at most. Referring to fig. 2, in the transfer lamination, the pole piece P enters the roller 200 together with the upper lithium film L1 and the lower lithium film L2 and is rolled.
In the conventional rolling equipment with a constant roll gap mode, if the roll gap is set to be large, the lithium films (L1 and L2) corresponding to the thick area A part of the pole piece can transfer and overlay the metal lithium layer on the pole piece P, and the lithium films (L1 and L2) corresponding to the thin area B part of the pole piece can not transfer and overlay the metal lithium layer on the pole piece P; if the roll gap is set to be small, when the metal lithium layer corresponding to the lithium film (L1 and L2) corresponding to the thin area B part of the pole piece can be transferred to the pole piece P, the serious wrinkle phenomenon will occur to the thick area A part corresponding to the pole piece, which causes the damage of the pole piece P and influences the use.
The transfer laminating device adopts constant pressure control, and the roll gap can be quickly and automatically adapted according to the thickness of the material. When the part A of the thick area of the pole piece and the part B of the thin area of the pole piece are aimed at, the parts A and B correspond to different roll gaps respectively, but the rolling pressure can be kept constant, so that the rolling pressure of each position of the pole piece P can be ensured to be the same, and the wrinkles caused by overlarge local rolling pressure are effectively avoided on the premise of finishing the transfer laminating function.
The utility model relates to a quick response transfer combination device for lithium battery prelithiation, which comprises:
the bracket is of a detachable structure and comprises an inner bracket, an outer bracket, a connecting column and a connecting block, wherein the connecting column and the connecting block are used for connecting the inner bracket and the outer bracket; bearing seat lining plates are arranged on the inner side bracket and the outer side bracket at positions opposite to the lower bearing seats;
the double rollers comprise upper rollers and lower rollers, and the upper rollers and the lower rollers are both provided with internal hollow structures and smaller shaft necks meeting the strength requirements;
the upper bearing seat is divided into an inner upper bearing seat and an outer upper bearing seat, the inner upper bearing seat and the outer upper bearing seat are connected with shaft journals at two ends of the upper roller through bearings, and then the upper bearing seat is fixedly connected to the bracket;
the lower bearing seat is divided into an inner lower bearing seat and an outer lower bearing seat, and the inner lower bearing seat and the outer lower bearing seat are connected with shaft necks at two ends of the lower roller through bearings; the bearing seat also comprises a bearing seat main body and needle rolling plates, wherein the needle rolling plates are arranged on two sides of the bearing seat main body, and the other sides of the needle rolling plates are in contact with a bearing seat lining plate on the support;
the pair roller driving device comprises a motor and a speed reducer and is used for driving the upper roller and the lower roller;
and the pressure thrust mechanism is used for driving the inner lower bearing seat and the outer lower bearing seat to move along the vertical direction.
In some embodiments, the upper roller is of a generally solid structure, and the lower roller, which has only a function of moving in a vertical direction, is of a hollow structure, ensuring low weight and low inertia.
In some embodiments, the upper and lower bearing housings have a smaller volume to meet strength requirements, and therefore the bearing housings also feature low weight and low inertia.
The following describes in detail a specific embodiment of a fast response transfer hybrid apparatus for prelithiation of a lithium battery with reference to the accompanying drawings.
Referring to fig. 3, 4 and 5, an exemplary fast response transfer compounding device for prelithiation of a lithium battery of the present invention includes:
the bracket 100 is of a detachable structure and comprises an inner bracket 101, an outer bracket 102, a connecting column 103 and a connecting block 104, wherein the connecting column 103 is used for connecting the inner bracket 101 and the outer bracket 102; bearing seat lining plates 110 are arranged on the inner side bracket 101 and the outer side bracket 102 at positions opposite to lower bearing seats (420 and 410);
the double-roller 200 comprises an upper roller 201 and a lower roller 202, wherein the upper roller 201 and the lower roller 202 both have internal hollow structures and smaller journals meeting strength requirements; in some embodiments, only the lower roller 202 may be an internal hollow structure.
An upper bearing housing 300 divided into an inner upper bearing housing 310 and an outer upper bearing housing 320, both of which are connected to journals at both ends of the upper roll by bearings and then fixedly connected to the bracket 100;
a lower bearing seat 400 divided into an inner lower bearing seat 410 and an outer lower bearing seat 420, both of which are connected with journals at both ends of the lower roll through bearings; the lower bearing housing 400 further includes a housing body 401 and needle plates 402, the needle plates 402 being disposed at both sides of the housing body 401, the other sides of the needle plates 402 being in contact with the housing liner 110 on the bracket 100; the bearing block liner 110 is fixedly connected to the bracket 100;
the pair roller driving device 500 comprises an upper roller driving motor 511, an upper roller speed reducer 512, a lower roller driving motor 521 and a lower roller speed reducer 522, wherein the upper roller driving motor 511 drives the upper roller 201 to rotate after speed reduction through the upper roller speed reducer 512, and the lower roller driving motor 521 drives the lower roller 202 to rotate after speed reduction through the lower roller speed reducer 522; in some other embodiments, the pair-roller driving device 500 may only include one set of driving motor and speed reducer, where the speed reducer is a dual output shaft for driving the upper roller 201 and the lower roller 202 to rotate simultaneously;
the pressure thrust mechanism 600 is configured to drive the inner lower bearing housing 410 and the outer lower bearing housing 420 to move in the vertical direction, in this embodiment, the pressure thrust mechanism 600 is a hydraulic servo cylinder, and in some embodiments, a servo electric cylinder, a gas-liquid pressure boost cylinder, an electro-hydraulic servo cylinder, or the like may be used.
In this embodiment, axial spacing of lower bearing housing 400 is achieved using bearing housing end baffle assembly 430; the bearing seat end baffle assembly 430 comprises an end baffle body 431, an end baffle bearing 432 and a bearing fixing shaft 433, wherein a groove is formed in the end baffle body 431, the end baffle bearing 432 is arranged in the groove and is fixed by the bearing fixing shaft 433, and the outer circular surface of the fixed end baffle bearing 432 slightly protrudes out of the end baffle body 431; thus, there is rolling friction between the bearing housing body 401 and the bearing housing end stop assembly 430 with minimal frictional resistance.
In this embodiment, both the upper roll chock 300 and the lower roll chock 400 adopt a structure of smaller volume satisfying the strength requirement, and have extremely small weight and inertia; in some embodiments, only the lower roll chock 400 may be of a smaller volume construction.
In the utility model, the lower roller bearing seat 400 and the lower roller 202 have extremely small weight and motion inertia, and the structure of the roller plate 402 and the bearing seat end baffle plate assembly 430 reduces the running resistance of the bearing seat in the working process, thereby ensuring that the lower roller 202 can rapidly move in the vertical direction according to the thickness of materials in the running process of the transfer combination device and realizing rapid response.
Although the present invention has been disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A lithium battery prelithiation is with quick response transfer set that compounds, it characterized in that, transfer set includes:
a support;
the double rollers consist of an upper roller and a lower roller which are arranged in parallel;
an upper bearing seat for mounting the upper roller;
a lower bearing seat for mounting the lower roller;
a pair roller driving device; and
the pressure thrust mechanism is arranged on the upper portion of the main body,
wherein,
the upper bearing seat is fixedly connected with the bracket, and the lower bearing seat is movably connected with the bracket and can move along the vertical direction;
the pair roller driving device is used for driving the upper roller and the lower roller to rotate;
the pressure thrust mechanism is used for driving the lower roller to move along the vertical direction.
2. The rapid response transfer compounding device for prelithiation of a lithium battery as in claim 1, wherein said lower bearing housing comprises a housing main body and needle roller plates disposed on both sides of the housing main body; and a bearing seat lining plate is arranged on the support and opposite to the lower bearing seat, and the bearing seat lining plate is in contact with the needle roller plate on the bearing seat and is in rolling friction with the needle roller plate.
3. The rapid response transfer compounding device for prelithiation of a lithium battery as in claim 1, wherein said lower bearing support is axially fixed by an end shield assembly, said end shield assembly having an end shield bearing disposed therein, said bearing contacting said bearing support with rolling friction therebetween.
4. The rapid response transfer manifold for prelithiation of a lithium battery as in claim 1, wherein said pair of rollers are hollow.
5. The rapid response transfer lamination device for prelithiation of a lithium battery as in claim 1, wherein only the lower roller of said pair of rollers is hollow.
6. The rapid response transfer compounding device for prelithiation of a lithium battery as in claim 1, wherein said counter-roller drive comprises a motor and a speed reducer.
7. The rapid response transfer combination device for prelithiation of a lithium battery as in claim 6, wherein said pair roller drive means comprises two sets of motors and speed reducers for driving the upper roller and the lower roller, respectively.
8. The rapid response transfer compounding device for prelithiation of a lithium battery as in claim 1, wherein said pressure thrust mechanism is a servo hydraulic cylinder.
9. The rapid response transfer manifold device for prelithiation of a lithium battery as in claim 1, wherein said scaffold is of a detachable construction.
10. The rapid response transfer assembly for prelithiation of a lithium battery as in claim 9, wherein said support comprises an inner support, an outer support, and connecting posts and blocks for connecting the inner and outer supports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122664506.0U CN216120365U (en) | 2021-11-02 | 2021-11-02 | Lithium cell prelithiation is with quick response transfer composite device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122664506.0U CN216120365U (en) | 2021-11-02 | 2021-11-02 | Lithium cell prelithiation is with quick response transfer composite device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216120365U true CN216120365U (en) | 2022-03-22 |
Family
ID=80712517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122664506.0U Active CN216120365U (en) | 2021-11-02 | 2021-11-02 | Lithium cell prelithiation is with quick response transfer composite device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216120365U (en) |
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2021
- 2021-11-02 CN CN202122664506.0U patent/CN216120365U/en active Active
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