CN221201200U - Novel lithium belt rolling device - Google Patents
Novel lithium belt rolling device Download PDFInfo
- Publication number
- CN221201200U CN221201200U CN202322576290.1U CN202322576290U CN221201200U CN 221201200 U CN221201200 U CN 221201200U CN 202322576290 U CN202322576290 U CN 202322576290U CN 221201200 U CN221201200 U CN 221201200U
- Authority
- CN
- China
- Prior art keywords
- driving roller
- fixed
- roller
- movable
- lithium
- 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
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 47
- 238000005096 rolling process Methods 0.000 title claims abstract description 24
- 238000003490 calendering Methods 0.000 claims abstract description 6
- 229920002799 BoPET Polymers 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 239000010408 film Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to the technical field of batteries, in particular to a novel lithium belt rolling device which comprises a movable driving roller, a fixed driving roller and a fixed back roller; the fixed driving roller is arranged between the movable driving roller and the fixed back roller, the fixed driving roller is tangentially arranged with the fixed back roller, wherein a rolling working position is arranged between the movable driving roller and the fixed driving roller, and the diameter of the fixed driving roller is smaller than that of the movable driving roller and the diameter of the fixed back roller. According to the utility model, the fixed driving roller is arranged to be smaller than the movable driving roller, so that the stress areas of the fixed driving roller and the movable driving roller are small and the stress is larger during rolling, and meanwhile, the fixed back roller is added to prevent the fixed driving roller from deforming, and the deformation of the fixed driving roller directly influences the precision of lithium thin after rolling; the reduction of the outer diameter of the fixed drive roll increases the pressure angle, which is also beneficial to the calendaring effect, and such a combination increases the strength, reduces the deformation of the roll, and ensures a proper pressure angle.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a novel lithium belt rolling device.
Background
When the lithium ion battery is charged and discharged for the first time, the electrode material and the electrolyte react on the solid-liquid phase interface to form a SEI film (solid electrolyte interface) which covers the surface of the electrode material. The SEI film consumes a part of lithium ions in the cathode material during the generation process, thereby irreversibly causing a decrease in energy density of the lithium ion battery. In order to improve the problem, a layer of metal lithium film is usually coated on the surface of the negative electrode sheet in advance in the production process of the lithium ion battery, so that in the discharge process, the metal lithium on the negative electrode material can lose electrons and oxidize into lithium ions to return to the positive electrode material, thereby compensating the loss of the lithium ions of the positive electrode material and improving the energy density of the lithium ion battery.
Aiming at the technical equipment for pressing a metal lithium film on the surface of a negative plate in advance, the prior art discloses a calendaring mechanism and a pole piece lithium supplementing device, wherein the publication number of the technological equipment is CN207038626U, and the Chinese patent of the utility model is 2018, 02 and 23. However, these two calender rolls are two rolls having the same size, the pressure angle is small, the calender effect is not good, if the diameter is set to be relatively large, the pressure angle is small, the stress area is large, the calender effect is not ideal, if the diameter is set to be relatively small, the pressure angle is large, the stress area is small, but the stress is small, and the calender effect is also not ideal.
Disclosure of utility model
In order to solve the problems in the background art, the utility model provides a novel lithium belt rolling device which is used for rolling in the lithium supplementing process of a negative plate and solves the problem of poor rolling effect in the prior art.
The utility model solves the technical problems by adopting the following scheme: the novel lithium belt rolling device comprises a movable driving roller, a fixed driving roller and a fixed back roller; the lithium band, the first PET film and the second PET film are combined together and pass through the movable driving roller and the fixed driving roller, the sum of the thicknesses of the lithium band, the first PET film and the second PET film is smaller than the gap between the movable driving roller and the fixed driving roller, the lithium band is arranged between the first PET film and the second PET film, the first PET film is arranged between the lithium band and the movable driving roller, the second PET film is arranged between the lithium band and the fixed driving roller, and the lithium band is attached to the second PET film after passing through the movable driving roller and the fixed driving roller.
In the above structure, the rotation direction of the movable driving roller is opposite to the rotation direction of the fixed driving roller.
In the structure, the diameters of the movable driving roller and the fixed back roller are equal.
In the above structure, there is a speed difference between the linear speed of the movable driving roller and the linear speed of the fixed driving roller so that the lithium strip is cut to form a lithium thin during the rolling process.
In summary, the beneficial effects of the utility model are as follows: the fixed driving roller is arranged smaller than the movable driving roller, so that the stress areas of the fixed driving roller and the movable driving roller are small during rolling, the stress is larger, and meanwhile, the fixed back roller is added to prevent the deformation of the fixed driving roller, and the deformation of the fixed driving roller directly influences the precision of lithium thin after rolling; the reduction of the outer diameter of the fixed drive roll increases the pressure angle, which is also beneficial to the calendaring effect, and such a combination increases the strength, reduces the deformation of the roll, and ensures a proper pressure angle.
The foregoing description is only an overview of the technical solution of the present utility model, and may be implemented according to the content of the specification in order to make the technical means of the present utility model more clearly understood, and in order to make the above and other objects, features and advantages of the present utility model more clearly understood, the following specific preferred embodiment is given by way of the following detailed description in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the present utility model.
In the figure: 1. a movable drive roll; 2. fixing a driving roller; 3. fixing a back roller; 4. a lithium strip; 5. a first PET film; 6. a second PET film; 7. and (5) obtaining a finished product.
Detailed Description
In order that the utility model may be more readily understood, a further description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
It should be noted that, as used herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Unless otherwise indicated, the meaning of "a plurality" is two or more.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
Referring to the attached drawings, the novel lithium belt rolling device comprises a movable driving roller 1, a fixed driving roller 2 and a fixed back roller 3; the center axes of rotation of the movable driving roller 1, the center axes of rotation of the fixed driving roller 2 and the center axes of rotation of the fixed back roller 3 are coplanar, the fixed driving roller 2 is placed between the movable driving roller 1 and the fixed back roller 3, the fixed driving roller 2 and the fixed back roller 3 are placed tangentially, rolling working positions are arranged between the movable driving roller 1 and the fixed driving roller 2, the diameter of the fixed driving roller 2 is smaller than that of the movable driving roller 1, the diameter of the fixed back roller 3, the lithium belt 4, the first PET film 5 and the second PET film 6 are combined together and pass through the movable driving roller 1 and the fixed driving roller 2, the sum of the thicknesses of the lithium belt 4, the first PET film 5 and the second PET film 6 is smaller than the gap between the movable driving roller 1 and the fixed driving roller 2, the lithium belt 4 is placed between the first PET film 5 and the second PET film 6, the first PET film 5 is placed between the lithium belt 4 and the movable driving roller 1, the second PET film 6 is placed between the lithium belt 4 and the fixed driving roller 2, and the lithium belt 4 and the second PET film 6 is attached to the second PET film 6 after being pressed by the movable driving roller 1 and the fixed driving roller 2. The lithium strip 4 is rolled into a lithium thin film and attached to the second PET film 6 to form a finished product 7.
Further, the rotation direction of the movable drive roller 1 is opposite to the rotation direction of the fixed drive roller 2.
Further, the diameters of the movable driving roller 1 and the fixed back roller 3 are equal.
Further, there is a speed difference between the linear speed of the movable driving roll 1 and the linear speed of the fixed driving roll 2 so that the lithium belt 4 is cut to form a lithium thin during the rolling process and the lithium thin is attached to the second PET film 6.
According to the utility model, the fixed driving roller 2 is arranged smaller than the movable driving roller 1, so that the stress areas of the fixed driving roller 2 and the movable driving roller 1 are small and larger during rolling, and meanwhile, the fixed back roller 3 is added to prevent the fixed driving roller 2 from deforming, and the deformation of the fixed driving roller 2 directly influences the accuracy of lithium thin after rolling; the reduction of the outer diameter of the fixed drive roll 2 increases the pressure angle and is also advantageous for the calendering effect, such a combination not only increasing the strength, reducing the deformation of the roll, but also ensuring a suitable pressure angle.
The utility model solves the following problems by combining the large roller with the small roller: the diameter is larger, the pressure angle is smaller, the stress area is larger, the rolling effect is not ideal, if the diameter is smaller, the pressure angle is larger, the stress area is smaller, but the diameter is smaller, the stress is smaller, and the rolling effect is also not ideal. By arranging the movable driving roller 1, the fixed driving roller 2 and the fixed back roller 3, the problem that the fixed driving roller 2 cannot bear large force is solved, the problem that the diameter is set to be large and the pressure angle is small is solved, and a good calendaring effect is achieved.
The above examples are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and modifications made by those skilled in the art based on the present utility model are included in the scope of the present utility model.
Claims (4)
1. Novel lithium area roll-in device, its characterized in that: comprises a movable driving roller, a fixed driving roller and a fixed back roller; the lithium belt, the first PET film and the second PET film are combined together and pass through the movable driving roller and the fixed driving roller, the sum of the thicknesses of the lithium belt, the first PET film and the second PET film is smaller than the gap between the movable driving roller and the fixed driving roller, the lithium belt is placed between the first PET film and the second PET film, the first PET film is placed between the lithium belt and the movable PET roller, the second PET film is placed between the lithium belt and the fixed driving roller, the diameter of the fixed driving roller is smaller than the diameter of the movable driving roller and the diameter of the fixed driving roller, and the lithium belt is attached to the second film after being rolled through the movable driving roller and the fixed driving roller.
2. The lithium belt rolling device according to claim 1, wherein: the rotation direction of the movable driving roller is opposite to that of the fixed driving roller.
3. The lithium belt rolling device according to claim 1, wherein: the diameters of the movable driving roller and the fixed back roller are equal.
4. The lithium belt rolling device according to claim 2, wherein: the linear speed of the movable driving roller and the linear speed of the fixed driving roller are different so as to cut the lithium belt to form a lithium thin in the calendaring process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322576290.1U CN221201200U (en) | 2023-09-22 | 2023-09-22 | Novel lithium belt rolling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322576290.1U CN221201200U (en) | 2023-09-22 | 2023-09-22 | Novel lithium belt rolling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221201200U true CN221201200U (en) | 2024-06-21 |
Family
ID=91525507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322576290.1U Active CN221201200U (en) | 2023-09-22 | 2023-09-22 | Novel lithium belt rolling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221201200U (en) |
-
2023
- 2023-09-22 CN CN202322576290.1U patent/CN221201200U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9368799B2 (en) | Method of making negative electrode | |
| KR101099903B1 (en) | Electrode plate for battery, polar plate group for battery, lithium secondary battery, method for manufacturing electrode plate for battery, and apparatus for manufacturing electrode plate for battery | |
| CN107658428B (en) | Lithium ion battery negative electrode piece lithium supplementing device and lithium supplementing method | |
| US11050050B1 (en) | Electrolytic copper foil and electrode and lithium-ion cell comprising the same | |
| KR20100112645A (en) | Electrode group for nonaqueous battery and method for producing same, and tubular nonaqueous secondary battery and method for manufacturing same | |
| CN108188180B (en) | Double-lithium foil preparation device and preparation method | |
| CN113675363A (en) | Pole piece lithium supplementing method and pole piece lithium supplementing device | |
| US11437608B2 (en) | Device and method for supplementing electrode sheet with lithium | |
| CN112289592A (en) | Lithium ion capacitor and preparation method thereof | |
| CN221201200U (en) | Novel lithium belt rolling device | |
| CN114614066A (en) | Battery winding method and device | |
| CN115763681A (en) | Method and equipment for supplementing lithium to negative pole piece | |
| CN208655791U (en) | Battery pole piece roll | |
| CN212874546U (en) | Horizontal laminating mechanism for lithium supplement | |
| CN109742326B (en) | Lithium ion battery pole piece rolling device | |
| KR20180022039A (en) | Pressing Apparatus for Electrode Sheet Having Guide Roller | |
| CN221246532U (en) | Smoothing device, cold pressing equipment and battery production line | |
| CN113690400B (en) | Pole piece lithium supplementing method and pole piece lithium supplementing device | |
| CN219226353U (en) | Tab smoothing mechanism and winding device | |
| CN221125987U (en) | Lithium battery cathode and lithium battery | |
| CN219832703U (en) | Coating current collector, pole piece and lithium battery | |
| CN116759537B (en) | Lithium battery negative electrode and preparation method and application thereof | |
| CN220821621U (en) | Electrode preparation device | |
| CN218471984U (en) | Lithium battery negative electrode pre-lithium release film | |
| KR102497772B1 (en) | Electrode fabric roll pressing device for secondary batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |