CN-122000279-A - Device and method for preparing solid-state battery core material by magnetic evaporation and magnetic deposition

CN122000279ACN 122000279 ACN122000279 ACN 122000279ACN-122000279-A

Abstract

The invention discloses a preparation device and a preparation method of a solid battery core material deposited by magnetic evaporation and magnetic force, which specifically comprise the following steps of taking a roll of polymer film as a substrate, and forming an aluminum metal current collector I by evaporation and deposition on one side of the polymer film; and taking a roll of the polymer film as a substrate after being unfolded, evaporating and depositing one side of the polymer film to form a copper metal current collector I, forming a copper metal current collector II on the other side of the polymer film, and carrying out delay-pressing compounding on the polymer film attached with the negative electrode material layer and the polymer film on the side of the copper metal current collector I. The problems of high production cost, low production efficiency and low drying efficiency existing in the existing solid-state battery core material preparation process are solved.

Inventors

JI JUNPENG
ZHANG ERJIE
ZHAO HUI
WANG YAZHOU
LU JINGJIE
Dang Yani
LI XIAOQIANG

Assignees

西安理工大学

Dates

Publication Date: 20260508
Application Date: 20260310

Claims (10)

1. A preparation device of a solid battery core material by magnetic evaporation and magnetic deposition is characterized by comprising the following steps of taking a roll of a polymer film (1) as a substrate, evaporating and depositing one side of the polymer film (1) to form an aluminum metal current collector I, forming an aluminum metal current collector II on the other side of the polymer film (1), sequentially coating a positive electrode material layer, an electrolyte layer and a negative electrode material layer on the surface of the aluminum metal current collector I, taking another roll of the polymer film (1) as the substrate, evaporating and depositing one side of the polymer film (1) to form a copper metal current collector I, forming a copper metal current collector II on the other side of the polymer film (1), and carrying out extension-pressing compounding on the polymer film (1) attached with the negative electrode material layer and the polymer film (1) on the side of the copper metal current collector I.
2. The device for preparing the solid battery core material by magnetic evaporation and magnetic deposition according to claim 1, wherein the aluminum metal current collector I, the aluminum metal current collector II, the copper metal current collector I and the copper metal current collector II are formed by adopting a magnetic evaporation and magnetic deposition preparation metal current collector device for magnetic evaporation and magnetic deposition.
3. The device for preparing the solid battery core material by the magnetocaloric evaporation and magnetic deposition according to claim 2, wherein the device for preparing the metal current collector by the magnetocaloric evaporation and magnetic deposition comprises a plurality of crucibles (4) which are positioned in a vacuum chamber, wherein a magnetic deposition coil (3) is wound on the upper side of the outer wall of each crucible (4), and a magnetocaloric evaporation coil (2) is wound on the lower side of the outer wall of each crucible (4).
4. The device for preparing a solid battery core material by magnetic evaporation and magnetic deposition according to claim 3, wherein the electrolyte layer is formed by coating a solid electrolyte (9) on the positive electrode material layer and drying the solid electrolyte (9) by a drying device.
5. The device for preparing the solid-state battery core material by magnetic evaporation and magnetic deposition according to claim 4, wherein the drying device is a square spiral coil group (10) and comprises four square spiral coils which are connected end to end in sequence.
6. The device for preparing solid-state battery core materials by magnetocaloric evaporation and magnetic deposition according to claim 5, characterized in that the lateral number of the crucibles (4) The calculation is carried out by adopting the following formula (1): (1) longitudinal number of crucibles (4) The calculation is carried out by adopting the following formula (2): (2) Wherein, the Is the distance between the crucible (4) and the polymer film (1), The length h of the polymer film (1) in the vacuum chamber is the height of the crucible (4), Is the radius of the bottom of the crucible (4), Is the radius of the opening of the crucible (4), The width of the metal coating is the width of the metal coating; The calculation process of the opening radius r a of the crucible (4) comprises the following steps: considering that the evaporated metal in the crucible (4) is completely deposited on the polymer film (1), the mass of the metal deposited on the polymer film (1) Mass of metal evaporated in the crucible (4) The matching, the concrete calculation process is as follows: (3) Wherein, the The total length of continuous film required for a single cell, In order to achieve a metal density, Is the thickness of the metal coating film, Is the average evaporation flux per unit area, Is the running speed of the polymer film (1).
7. The device for preparing solid-state battery core materials by magnetic evaporation and magnetic deposition according to claim 6, wherein the number of turns of the magnetic evaporation coil (2) The design process of (2) is as follows: Consider a solenoid coil inductance model Design the number of turns of the magnetocaloric evaporating coil (2) Wherein The effective magnetic flux cross section area of the magnetic heat evaporation coil (2) is determined by the average radius of the coil, and the number of turns of the magnetic heat evaporation coil (2) The calculation formula of (2) is as follows: (4) Wherein, the The vacuum magnetic permeability is adopted, and d is the wall thickness of the crucible; the magnetocaloric evaporating coil (2) is supplied with current The calculation process of (2) is as follows: (5) Wherein, the In order for the heated metal to have magnetic permeability, T s is the heating time required for evaporating the metal in the crucible (4) in order to heat the metal, The distance from the magnetic heat evaporation coil (2) to the molten metal is the same; The calculation process of the lead radius r 2 of the magnetocaloric evaporation coil (2) is as follows: (6) Wherein, the The current density is allowed for the wire, For the conductivity of the metal, In order to be heated to a metal thickness, Is skin depth.
8. The device for preparing solid-state battery core material by magnetocaloric evaporation and magnetic deposition according to claim 7, wherein the magnetic deposition coil (3) is electrically connected with current The calculation process of (2) is as follows: (7) Wherein m is the mass of magnetically deposited metal ions, For the initial velocity of the magnetically deposited metal ions, For the target speed of the magnetic deposition of metal ions, For the magnetic deposition of the number of coil turns, Is the magnetic deposition time.
9. The process for preparing a solid-state battery cell material by magnetocaloric evaporation and magnetic deposition according to claim 8, wherein the width L 1 of the square spiral coil group (10) is calculated as follows: (8) The square spiral coil group (10) is supplied with current The calculation process of (2) is as follows: (9) Wherein, the Drying the heating time of the electrolyte layer for the square induction heating coil; Square spiral coil set (10) turns The calculation process of (2) is as follows: (10) Wherein, the In order to achieve the density of the metal material, Is the length of the innermost turn of the square plane spiral coil, The square plane spiral coil is supplied with current, Is the drying temperature difference.
10. The device for preparing a solid-state battery cell material by magnetic evaporation and magnetic deposition according to claim 9, wherein the distance e between the square spiral coil group (10) and the polymer film (1) is calculated by adopting the following formula: (11) The calculation process of the transverse distance l 3 between adjacent crucibles (4) is as follows: (12)。

Description

Device and method for preparing solid-state battery core material by magnetic evaporation and magnetic deposition Technical Field The invention belongs to the technical field of manufacturing of new energy automobile batteries, and relates to a device and a method for preparing a solid battery core material by magnetic evaporation and magnetic deposition. Background At present, the solid-state battery technology is regarded as an important development direction of the next-generation energy storage technology due to the advantages of high energy density, strong safety, long cycle life and the like, and has wide application prospects in the fields of electric automobiles, energy storage power stations and the like. Among them, the thickness, conductivity and interfacial stability of the metal current collector, which is an important component of the electrode, directly affect the energy density and overall performance of the battery. The metal coating process is an important step for realizing the surface functionalization of the current collector and the deposition of the conductive layer, and has an important influence on the production efficiency. The electrolyte layer drying process generally requires a drying process after coating to remove the solvent and form a dense structure. The improvement of the production efficiency of the solid-state battery manufacturing process is a core difficult problem faced by the research and development of the current industry, can realize the manufacturing of ultrathin current collectors, low-cost large-scale coating and efficient drying, and is a key demand hot spot for the industrial popularization of the solid-state battery. In the traditional manufacturing process, the method is limited by a rolling process, the ultrathin solid metal current collector is difficult to realize, so that the waste of metal materials is caused, the manufacturing cost of a battery is increased, in the existing metal coating method, the problems of low deposition speed and difficult mass production exist in actual production of resistance evaporation coating, in the process of drying an electrolyte layer, the problems of low heat transfer efficiency, uneven temperature distribution and the like exist in a contact heating mode due to the fact that the solid electrolyte material generally has low heat conductivity, the drying efficiency is easy to be low, and the overall efficiency of a solid battery production line is further influenced. The existing solid-state battery manufacturing process cannot compensate for the short plates of the solid-state battery in terms of production efficiency and cost control. Therefore, there is still a clear technical gap in the aspects of mass production and performance improvement of solid-state batteries in the prior art, and improvement is needed. Disclosure of Invention The invention aims to provide a device and a method for preparing a solid battery core material by magnetic evaporation and magnetic deposition, which solve the problems of high production cost, low production efficiency and low drying efficiency in the existing preparation process of the solid battery core material. The technical scheme includes that a roll of polymer film is unfolded to serve as a substrate, an aluminum metal current collector I is formed on one side of the polymer film through evaporation deposition, an aluminum metal current collector II is formed on the other side of the polymer film, a positive electrode material layer, an electrolyte layer and a negative electrode material layer are sequentially coated on the surface of the aluminum metal current collector I, another roll of polymer film is unfolded to serve as a substrate, a copper metal current collector I is formed on one side of the polymer film through evaporation deposition, a copper metal current collector II is formed on the other side of the polymer film, and the polymer film on one side of the polymer film attached with the negative electrode material layer and the copper metal current collector I are subjected to extension-compression compounding, so that the solid-state battery cell is obtained. The invention is also characterized in that: The aluminum metal current collector I, the aluminum metal current collector II and the copper metal current collector I and the copper metal current collector II are formed by adopting a magnetic thermal evaporation magnetic deposition preparation metal current collector device to carry out magnetic thermal evaporation magnetic deposition. The device for preparing the metal current collector by magnetic evaporation and magnetic deposition comprises a plurality of crucibles positioned in a vacuum chamber, wherein a magnetic deposition coil is wound on the upper side of the outer wall of each crucible, and a magnetic evaporation coil is wound on the lower side of the outer wall of each crucible. The electrolyte layer is formed by coating solid electrolyte on the posi