Solid-state battery manufacturing method and system based on 3D printing

Abstract

The invention relates to the technical field of battery manufacturing and discloses a solid-state battery manufacturing method and system based on 3D printing, a battery cell is directly formed in one step in a 3D printing mode, the battery can be packaged without winding and lamination processes, and the method and system have the advantages of simple process, low cost, high production efficiency and the like. In addition, a proper capacity can be designed and a special battery form can be customized according to requirements, so that a new way is provided for large-scale production and application of the solid-state battery.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a solid-state battery manufacturing method and system based on 3D printing. Background Art

[0002] With the continuous progress and rapid development of science and technology, batteries, as a vital energy storage and release device, play a pivotal role in the booming new energy industry. The optimization of their performance and the improvement of their efficiency have far-reaching and significant significance for promoting the entire new energy field to a higher level of development.

[0003] In recent years, solid-state batteries have gradually attracted widespread attention and heated discussions from both inside and outside the industry due to their many advantages, including excellent high energy density, ultra-long service life and unparalleled safety.

[0004] Unfortunately, however, traditional solid-state batteries have a considerable degree of complexity in the manufacturing process, coupled with high costs and relatively low production efficiency. These factors together constitute a significant obstacle to their large-scale commercial application and promotion.

[0005] Therefore, it is necessary to improve the existing technology.

[0006] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0007] The present invention provides a solid-state battery manufacturing method and system based on 3D printing to solve the problems existing in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] In a first aspect, the present invention provides a solid-state battery manufacturing method based on 3D printing, the method comprising:

[0010] S1. Spraying the positive electrode slurry onto the aluminum foil by 3D printing to obtain a positive electrode material layer on the aluminum foil;

[0011] S2. Spraying a solid electrolyte slurry on the positive electrode material layer by 3D printing to prepare a solid electrolyte layer on the positive electrode material layer;

[0012] S3, spraying the negative electrode slurry on the solid electrolyte layer by 3D printing to prepare a first negative electrode material layer on the solid electrolyte layer;

[0013] S4, spraying the negative electrode slurry on the copper foil by 3D printing to prepare a second negative electrode material layer on the copper foil;

[0014] S5, covering the first negative electrode material layer with the side of the copper foil having the second negative electrode material layer, to obtain a battery cell;

[0015] S6, cutting the battery cells and packaging them into batteries.

[0016] Furthermore, in the solid-state battery manufacturing method based on 3D printing, S1 includes:

[0017] The cathode slurry is sprayed onto the aluminum foil using 3D printing;

[0018] Curing the positive electrode slurry sprayed on the aluminum foil;

[0019] The cured positive electrode slurry is roll-pressed to prepare a positive electrode material layer on the aluminum foil.

[0020] Furthermore, in the solid-state battery manufacturing method based on 3D printing, S2 includes:

[0021] Spraying the solid electrolyte slurry onto the positive electrode material layer by 3D printing;

[0022] curing the solid electrolyte slurry sprayed on the positive electrode material layer;

[0023] The solidified solid electrolyte slurry is roll-pressed to prepare a solid electrolyte layer on the positive electrode material layer.

[0024] Furthermore, in the solid-state battery manufacturing method based on 3D printing, S3 includes:

[0025] Spraying the negative electrode slurry onto the solid electrolyte layer by 3D printing;

[0026] curing the negative electrode slurry sprayed on the solid electrolyte layer;

[0027] The solidified negative electrode slurry is roll-pressed to prepare a first negative electrode material layer on the solid electrolyte layer.

[0028] Furthermore, in the solid-state battery manufacturing method based on 3D printing, S4 includes:

[0029] The negative electrode slurry is sprayed on the copper foil by 3D printing;

[0030] curing the negative electrode slurry sprayed on the copper foil;

[0031] The solidified negative electrode slurry is roll-pressed to prepare a second negative electrode material layer on the copper foil.

[0032] Furthermore, in the solid-state battery manufacturing method based on 3D printing, S5 is:

[0033] The copper foil having the second negative electrode material layer is covered on the first negative electrode material layer, and compacted to obtain a battery cell.

[0034] Furthermore, in the solid-state battery manufacturing method based on 3D printing, the method further includes:

[0035] The organic solid electrolyte, the inorganic solid electrolyte and the binder are mixed and dissolved in DMF, and CF3SO3Li is added, mixed and stirred to obtain a solid electrolyte slurry;

[0036] The NCM material, conductive acetylene black and PVDF are mixed according to a set mass ratio and dispersed in NMP to obtain a positive electrode slurry;

[0037] Graphite, CNT and SBR are dissolved in NMP according to a set mass ratio to obtain a negative electrode slurry.

[0038] In a second aspect, the present invention provides a solid-state battery manufacturing system based on 3D printing, comprising a conveying mechanism, a first 3D printer having a first storage tank, a second 3D printer having a second storage tank, a third 3D printer having a third storage tank, a curing mechanism, a rolling mechanism, and a cutting mechanism;

[0039] The first 3D printer, the second 3D printer and the third 3D printer are arranged in sequence along the conveying direction of the conveying mechanism;

[0040] The conveying mechanism is used to convey the aluminum foil;

[0041] The first 3D printer is used to store positive electrode slurry in the first storage tank, and when the aluminum foil is conveyed, the positive electrode slurry is sprayed on the aluminum foil by 3D printing to prepare a positive electrode material layer on the aluminum foil;

[0042] The second 3D printer is used to store the solid electrolyte slurry in the second storage tank, and when the aluminum foil is conveyed, the solid electrolyte slurry is sprayed on the positive electrode material layer by 3D printing to prepare a solid electrolyte layer on the positive electrode material layer;

[0043] The third 3D printer is used to store the negative electrode slurry in the third storage tank, and when the aluminum foil is conveyed, the negative electrode slurry is sprayed on the solid electrolyte layer by 3D printing to obtain a first negative electrode material layer on the solid electrolyte layer; and is also used to spray the negative electrode slurry on the copper foil by 3D printing to obtain a second negative electrode material layer on the copper foil;

[0044] The cutting mechanism is used to cut the battery cell and package it into a battery after the side of the copper foil having the second negative electrode material layer is covered on the first negative electrode material layer to obtain the battery cell.

[0045] Furthermore, the 3D printing-based solid-state battery manufacturing system further includes a curing mechanism;

[0046] The curing mechanism is used to cure various sprayed slurries.

[0047] Furthermore, the 3D printing-based solid-state battery manufacturing system further includes a rolling mechanism;

[0048] The rolling mechanism is used to roll the solidified slurry.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The present invention provides a solid-state battery manufacturing method and system based on 3D printing, which directly forms battery cells in one step through 3D printing, and can be packaged into batteries without the need for winding and stacking processes. It not only has the advantages of simple process, low cost, and high production efficiency, but also can design suitable capacity and customize special battery forms according to needs, providing a new way for large-scale production and application of solid-state batteries.

[0051] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1It is a schematic flow chart of a solid-state battery manufacturing method based on 3D printing provided in Example 1 of the present invention;

[0054] Figure 2 It is a structural schematic diagram of a solid-state battery manufacturing system based on 3D printing provided in Embodiment 2 of the present invention;

[0055] Reference numerals:

[0056] Conveying mechanism 1, first storage tank 2, first 3D printer 3, second storage tank 4, second 3D printer 5, third storage tank 6, third 3D printer 7, rolling mechanism 8, cutting mechanism 9. DETAILED DESCRIPTION

[0057] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0058] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0059] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0060] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0061] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0062] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0063] In this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0064] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0065] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] Embodiment 1

[0067] In view of the above-mentioned defects in the prior art, the applicant, based on many years of rich practical experience and professional knowledge in design and manufacturing in this field, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the prior art. After continuous research and design, and after repeated trial production and improvement, the present invention with real practical value was finally created.

[0068] Please refer to Figure 1 , is a schematic flow chart of a solid-state battery manufacturing method based on 3D printing provided in Embodiment 1 of the present invention, which is applicable to the scenario of producing solid-state batteries. The method specifically comprises the following steps:

[0069] S1. Spraying the positive electrode slurry onto the aluminum foil by 3D printing to obtain a positive electrode material layer on the aluminum foil.

[0070] It should be noted that this step ensures uniform distribution and precise thickness control of the positive electrode material.

[0071] In one implementation of this embodiment, the S1 may be further refined to include the following contents:

[0072] The cathode slurry is sprayed onto the aluminum foil using 3D printing;

[0073] Curing the positive electrode slurry sprayed on the aluminum foil;

[0074] The cured positive electrode slurry is roll-pressed to prepare a positive electrode material layer on the aluminum foil.

[0075] It should be noted that, first, the positive electrode slurry is sprayed onto the aluminum foil substrate in a precisely controlled manner using 3D printing technology. This process ensures the uniform distribution of the positive electrode slurry and the precise formation of the required pattern, laying a solid foundation for subsequent steps.

[0076] Subsequently, the positive electrode slurry sprayed on the surface of the aluminum foil is cured. This step is crucial, as it not only allows the active material in the positive electrode slurry to fully combine with the binder to form a stable structure, but also enhances the mechanical strength and electrochemical performance of the positive electrode material layer. The curing process usually involves precise control of temperature and time to ensure that the performance of the positive electrode material layer is optimal.

[0077] Finally, the solidified positive electrode slurry is subjected to roller pressing. The roller pressing operation can further compact the positive electrode material layer, improve its density and uniformity, and also help improve the bonding force between the positive electrode material layer and the aluminum foil substrate. Through roller pressing, the thickness and morphology of the positive electrode material layer can be precisely controlled to meet the specific requirements of battery design.

[0078] In summary, through this series of detailed steps, this embodiment successfully achieved the precise preparation of the positive electrode material layer in S1, laying a solid foundation for the subsequent manufacture of solid-state batteries.

[0079] S2. Spraying a solid electrolyte slurry onto the positive electrode material layer by 3D printing to obtain a solid electrolyte layer on the positive electrode material layer.

[0080] It should be noted that this layer is a key channel for ion conduction inside the battery, and its quality and distribution are crucial to battery performance.

[0081] In one implementation of this embodiment, the S2 may be further refined to include the following contents:

[0082] Spraying the solid electrolyte slurry onto the positive electrode material layer by 3D printing;

[0083] curing the solid electrolyte slurry sprayed on the positive electrode material layer;

[0084] The solidified solid electrolyte slurry is roll-pressed to prepare a solid electrolyte layer on the positive electrode material layer.

[0085] It should be noted that, first, the solid electrolyte slurry is precisely sprayed onto the prepared cathode material layer using advanced 3D printing technology. This step requires a high degree of accuracy and uniformity to ensure that the solid electrolyte layer can completely cover the cathode material layer and provide an effective ion conduction path. The application of 3D printing technology enables the thickness, shape and distribution of the electrolyte layer to be precisely controlled.

[0086] Next, the solid electrolyte slurry sprayed on the surface of the positive electrode material layer is cured. Curing is a key step, which fixes the components in the electrolyte slurry to form a stable solid structure, thereby enhancing the mechanical strength and chemical stability of the electrolyte layer. The curing process usually involves precise control of temperature, time and environment to ensure that the performance of the electrolyte layer reaches the optimal state.

[0087] Finally, the solidified solid electrolyte slurry is subjected to roller pressing. The roller pressing operation can further compact the electrolyte layer and improve its density and uniformity of internal structure, which helps to improve the ion conductivity and mechanical strength of the electrolyte layer. At the same time, roller pressing can also help eliminate pores and defects in the electrolyte layer and improve its overall quality. Through roller pressing, the thickness, morphology and performance of the solid electrolyte layer can be precisely controlled to meet the specific requirements of battery design.

[0088] In summary, through this series of carefully designed steps, this embodiment successfully achieved the precise preparation of the solid electrolyte layer in S2, laying a solid foundation for the subsequent battery assembly and performance optimization.

[0089] S3. Spraying the negative electrode slurry on the solid electrolyte layer by 3D printing to obtain a first negative electrode material layer on the solid electrolyte layer.

[0090] It should be noted that this step ensures close contact between the negative electrode material and the electrolyte layer, which is conducive to the efficient transmission of electrons and ions.

[0091] In one implementation of this embodiment, the S3 may be further refined to include the following contents:

[0092] Spraying the negative electrode slurry onto the solid electrolyte layer by 3D printing;

[0093] curing the negative electrode slurry sprayed on the solid electrolyte layer;

[0094] The solidified negative electrode slurry is roll-pressed to prepare a first negative electrode material layer on the solid electrolyte layer.

[0095] It should be noted that, first, the negative electrode slurry is sprayed onto the prepared solid electrolyte layer in a precisely controlled manner using 3D printing technology. This step requires a high degree of accuracy and uniformity to ensure that the negative electrode slurry can completely cover the electrolyte layer and form a good interface contact with the electrolyte layer, providing a strong guarantee for subsequent battery performance. The application of 3D printing technology enables the thickness, shape and distribution of the negative electrode layer to be precisely controlled.

[0096] Subsequently, the negative electrode slurry sprayed on the surface of the solid electrolyte layer is cured. Curing is a crucial step, which fixes the active material, conductive agent and binder in the negative electrode slurry to form a stable solid structure, thereby enhancing the mechanical strength and electrochemical performance of the negative electrode material layer. The curing process usually involves precise control of temperature, time and environment to ensure that the performance of the negative electrode material layer reaches the optimal state.

[0097] Finally, the solidified negative electrode slurry is subjected to roller pressing. The roller pressing operation can further compact the negative electrode material layer and improve its density and uniformity of internal structure, which helps to improve the electronic conductivity and mechanical strength of the negative electrode material layer. At the same time, roller pressing also helps to eliminate pores and defects in the negative electrode layer and improve its overall quality. Through roller pressing, the thickness, morphology and performance of the first negative electrode material layer can be precisely controlled to meet the specific requirements of battery design.

[0098] In summary, through this series of carefully designed steps, this embodiment successfully achieves the precise preparation of the first negative electrode material layer in S3, laying a solid foundation for the subsequent battery assembly and performance optimization.

[0099] S4. Spraying the negative electrode slurry onto the copper foil by 3D printing to obtain a second negative electrode material layer on the copper foil.

[0100] It should be noted that this step provides the necessary negative electrode structure for subsequent battery assembly.

[0101] In one implementation of this embodiment, the S4 may be further refined to include the following contents:

[0102] The negative electrode slurry is sprayed on the copper foil by 3D printing;

[0103] curing the negative electrode slurry sprayed on the copper foil;

[0104] The solidified negative electrode slurry is roll-pressed to prepare a second negative electrode material layer on the copper foil.

[0105] It should be noted that, first, the negative electrode slurry is sprayed onto the copper foil substrate in a precise and uniform manner using 3D printing technology. This step requires a high degree of accuracy and uniformity to ensure that the negative electrode slurry can completely cover the surface of the copper foil, laying the foundation for the subsequent formation of a stable negative electrode material layer. The application of 3D printing technology enables the thickness, shape and distribution of the negative electrode layer to be precisely controlled to meet the specific needs of battery design.

[0106] Next, the negative electrode slurry sprayed on the copper foil surface is cured. Curing is a key step, which fixes the active material, conductive agent and binder in the negative electrode slurry to form a stable solid structure, thereby enhancing the mechanical strength and electrochemical performance of the negative electrode material layer. The curing process usually needs to be carried out at a specific temperature, time and environment to ensure that the performance of the negative electrode material layer reaches the optimal state.

[0107] Finally, the solidified negative electrode slurry is subjected to roller pressing. The roller pressing operation can further compact the negative electrode material layer and improve its density and uniformity of internal structure, which helps to improve the electronic conductivity and mechanical strength of the negative electrode material layer. At the same time, roller pressing can also help eliminate pores and defects in the negative electrode layer and improve its overall quality. Through roller pressing, the thickness, morphology and performance of the second negative electrode material layer can be precisely controlled to meet the specific requirements of battery design.

[0108] In summary, through this series of carefully designed steps, this embodiment successfully achieves the precise preparation of the second negative electrode material layer in S4, providing strong support for the subsequent battery assembly and performance optimization.

[0109] It can be understood that the curing mentioned above can be thermal curing or photocuring, and is not limited thereto.

[0110] S5. Cover the first negative electrode material layer on the side of the copper foil having the second negative electrode material layer to obtain a battery cell.

[0111] It should be noted that in this step, a complete battery cell structure is formed through precise alignment and bonding.

[0112] In one implementation of this embodiment, S5 may be further refined into the following contents:

[0113] The copper foil having the second negative electrode material layer is covered on the first negative electrode material layer, and compacted to obtain a battery cell.

[0114] It should be noted that, first, the side of the copper foil with the second negative electrode material layer is precisely aligned and covered on the first negative electrode material layer. This step requires a high degree of alignment accuracy and contact uniformity to ensure that a good interface contact can be formed between the two negative electrode material layers, providing a strong guarantee for the subsequent battery performance. In order to achieve this goal, advanced positioning and alignment technology is required to ensure the accuracy of the battery cell structure.

[0115] Next, the covered negative electrode material layer is compacted. Compaction is a key step, which can form a close contact between the two negative electrode material layers by applying appropriate pressure, thereby enhancing the mechanical strength and electrochemical performance of the battery cell. The compaction process usually needs to be carried out under specific temperature, pressure and time conditions to ensure the stability and reliability of the battery cell structure.

[0116] This compaction step successfully combines the two negative electrode material layers together to form a complete cell structure. The thickness, shape and performance of the cell are precisely controlled to meet the specific requirements of the battery design.

[0117] In summary, through this series of carefully designed steps, this embodiment successfully achieves precise assembly and high-quality formation of battery cells in S5, providing strong support for subsequent battery packaging and performance optimization.

[0118] S6, cutting the battery cells and packaging them into batteries.

[0119] It should be noted that in this step, the battery cell is precisely cut to ensure that its size meets the design requirements, and is packaged into a finished battery through a professional packaging process, which effectively eliminates the interface impedance between the solid electrolyte and the electrode.

[0120] In one implementation of this embodiment, the method further includes the following steps to ensure high-quality preparation of the solid electrolyte slurry, the positive electrode slurry, and the negative electrode slurry:

[0121] The organic solid electrolyte, the inorganic solid electrolyte and the binder are mixed and dissolved in DMF, and CF3SO3Li is added, mixed and stirred to obtain a solid electrolyte slurry;

[0122] The NCM material, conductive acetylene black and PVDF are mixed according to a set mass ratio and dispersed in NMP to obtain a positive electrode slurry;

[0123] Graphite, CNT and SBR are dissolved in NMP according to a set mass ratio to obtain a negative electrode slurry.

[0124] It should be noted that, first, in order to prepare the solid electrolyte slurry, the organic solid electrolyte (such as PEO), the inorganic solid electrolyte (such as LATP) and the binder (such as PVDF) are mixed and dissolved in a dimethylformamide (DMF) solvent. This step requires precise proportioning and full dissolution between the components to ensure the uniformity and stability of the solid electrolyte slurry. Subsequently, an appropriate amount of lithium trifluoromethanesulfonate (CF3SO3Li) is added to the mixed solution, and mixed and stirred at room temperature for 24 hours until all components are completely dissolved and evenly dispersed. This step not only helps to improve the ionic conductivity of the solid electrolyte, but also enhances its electrochemical stability.

[0125] Next, to prepare the positive electrode slurry, NCM (LiNi 0.5 Co 0.2 Mn 0.302 ) materials, conductive acetylene black and polyvinylidene fluoride (PVDF) are mixed in a set mass ratio (8:1:1). This step requires precise proportioning and uniform dispersion of the components to ensure the electrochemical performance and mechanical strength of the positive electrode slurry. Subsequently, the mixed materials are dispersed in N-methylpyrrolidone (NMP) solvent and fully stirred and dispersed until a uniform and stable positive electrode slurry is formed.

[0126] Finally, in order to prepare the negative electrode slurry, graphite, carbon nanotubes (CNT) and styrene butadiene rubber (SBR) are dissolved in NMP solvent according to the set mass ratio. This step also requires precise proportioning and full dissolution of the components to ensure the conductivity and mechanical strength of the negative electrode slurry. Through proper stirring and dispersion treatment, a uniform and stable negative electrode slurry was successfully prepared.

[0127] In summary, through this series of carefully designed material preparation steps, this embodiment successfully achieved high-quality preparation of solid electrolyte slurry, positive electrode slurry and negative electrode slurry, providing strong support for subsequent battery assembly and performance optimization.

[0128] Although the terms such as 3D printing, slurry, solid electrolyte, etc. are used more frequently in this application, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

[0129] A solid-state battery manufacturing method based on 3D printing provided in an embodiment of the present invention directly forms a battery cell in one step by 3D printing, and can be packaged into a battery without the need for winding and stacking processes. It not only has the advantages of simple process, low cost, and high production efficiency, but also can design appropriate capacity and customize special battery forms according to needs, providing a new way for large-scale production and application of solid-state batteries.

[0130] Embodiment 2

[0131] Please refer to Figure 2 , Embodiment 2 of the present invention provides a solid-state battery manufacturing system based on 3D printing, comprising a conveying mechanism 1, a first 3D printer 3 having a first storage tank 2, a second 3D printer 5 having a second storage tank 4, a third 3D printer 7 having a third storage tank 6, a curing mechanism, a rolling mechanism 8 and a cutting mechanism 9;

[0132] The first 3D printer 3, the second 3D printer 5 and the third 3D printer 7 are arranged in sequence along the conveying direction of the conveying mechanism 1, and the assembly line operation can effectively reduce the manpower and process time costs;

[0133] The conveying mechanism 1 is used to convey aluminum foil;

[0134] The first 3D printer 3 is used to store positive electrode slurry in the first storage tank 2, and when the aluminum foil is conveyed, the positive electrode slurry is sprayed on the aluminum foil by 3D printing to prepare a positive electrode material layer on the aluminum foil;

[0135] The second 3D printer 5 is used to store the solid electrolyte slurry in the second storage tank 4, and when the aluminum foil is conveyed, the solid electrolyte slurry is sprayed on the positive electrode material layer by 3D printing to prepare a solid electrolyte layer on the positive electrode material layer;

[0136] The third 3D printer 7 is used to store the negative electrode slurry in the third storage tank 6, and when the aluminum foil is conveyed, the negative electrode slurry is sprayed on the solid electrolyte layer by 3D printing to obtain a first negative electrode material layer on the solid electrolyte layer; and is also used to spray the negative electrode slurry on the copper foil by 3D printing to obtain a second negative electrode material layer on the copper foil;

[0137] The cutting mechanism 9 is used to cut the battery cell and package it into a battery after the side of the copper foil having the second negative electrode material layer is covered on the first negative electrode material layer to obtain the battery cell.

[0138] In one implementation of this embodiment, the solid-state battery manufacturing system further includes a curing mechanism;

[0139] The curing mechanism is used to cure various sprayed slurries.

[0140] In one implementation of this embodiment, the solid-state battery manufacturing system further includes a rolling mechanism 8;

[0141] The rolling mechanism 8 is used to roll the solidified slurry.

[0142] It should be noted that there may be three rolling mechanisms 8, corresponding to the first 3D printer 3, the second 3D printer 5 and the third 3D printer 7, respectively, so as to perform rolling after each spraying and curing. Figure 2 shown.

[0143] A solid-state battery manufacturing system based on 3D printing provided in an embodiment of the present invention directly forms battery cells in one step through 3D printing, and can be packaged into batteries without the need for winding and stacking processes. It not only has the advantages of simple process, low cost, and high production efficiency, but also can design suitable capacity and customize special battery forms according to needs, providing a new way for large-scale production and application of solid-state batteries.

[0144] The above system can execute the method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0145] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A solid-state battery manufacturing method based on 3D printing, characterized in that: The method comprises: S1. Spraying the positive electrode slurry onto the aluminum foil by 3D printing to obtain a positive electrode material layer on the aluminum foil; S2. Spraying a solid electrolyte slurry on the positive electrode material layer by 3D printing to prepare a solid electrolyte layer on the positive electrode material layer; S3, spraying the negative electrode slurry on the solid electrolyte layer by 3D printing to prepare a first negative electrode material layer on the solid electrolyte layer; S4, spraying the negative electrode slurry on the copper foil by 3D printing to prepare a second negative electrode material layer on the copper foil; S5, covering the first negative electrode material layer with the side of the copper foil having the second negative electrode material layer, to obtain a battery cell; S6, cutting the battery cells and packaging them into batteries.

2. The solid-state battery manufacturing method based on 3D printing according to claim 1, characterized in that: The S1 includes: The cathode slurry is sprayed on the aluminum foil by 3D printing; curing the positive electrode slurry sprayed on the aluminum foil; The cured positive electrode slurry is roll-pressed to prepare a positive electrode material layer on the aluminum foil.

3. The solid-state battery manufacturing method based on 3D printing according to claim 1, characterized in that: The S2 includes: Spraying the solid electrolyte slurry onto the positive electrode material layer by 3D printing; curing the solid electrolyte slurry sprayed on the positive electrode material layer; The solidified solid electrolyte slurry is roll-pressed to prepare a solid electrolyte layer on the positive electrode material layer.

4. The solid-state battery manufacturing method based on 3D printing according to claim 1, characterized in that: The S3 includes: Spraying the negative electrode slurry onto the solid electrolyte layer by 3D printing; curing the negative electrode slurry sprayed on the solid electrolyte layer; The solidified negative electrode slurry is roll-pressed to prepare a first negative electrode material layer on the solid electrolyte layer.

5. The solid-state battery manufacturing method based on 3D printing according to claim 1, characterized in that: The S4 includes: The negative electrode slurry is sprayed on the copper foil by 3D printing; curing the negative electrode slurry sprayed on the copper foil; The solidified negative electrode slurry is roll-pressed to prepare a second negative electrode material layer on the copper foil.

6. The method for manufacturing a solid-state battery based on 3D printing according to claim 1, characterized in that: The S5 is: The copper foil having the second negative electrode material layer is covered on the first negative electrode material layer, and compacted to obtain a battery cell.

7. The solid-state battery manufacturing method based on 3D printing according to claim 1, characterized in that: The method further comprises: The organic solid electrolyte, the inorganic solid electrolyte and the binder are mixed and dissolved in DMF, and CF3SO3Li is added, mixed and stirred to obtain a solid electrolyte slurry; The NCM material, conductive acetylene black and PVDF are mixed according to a set mass ratio and dispersed in NMP to obtain a positive electrode slurry; Graphite, CNT and SBR are dissolved in NMP according to a set mass ratio to obtain a negative electrode slurry.

8. A solid-state battery manufacturing system based on 3D printing, characterized in that: It includes a conveying mechanism, a first 3D printer having a first storage tank, a second 3D printer having a second storage tank, a third 3D printer having a third storage tank, a curing mechanism, a rolling mechanism and a cutting mechanism; The first 3D printer, the second 3D printer and the third 3D printer are arranged in sequence along the conveying direction of the conveying mechanism; The conveying mechanism is used to convey the aluminum foil; The first 3D printer is used to store positive electrode slurry in the first storage tank, and when the aluminum foil is conveyed, the positive electrode slurry is sprayed on the aluminum foil by 3D printing to prepare a positive electrode material layer on the aluminum foil; The second 3D printer is used to store the solid electrolyte slurry in the second storage tank, and when the aluminum foil is conveyed, the solid electrolyte slurry is sprayed on the positive electrode material layer by 3D printing to prepare a solid electrolyte layer on the positive electrode material layer; The third 3D printer is used to store the negative electrode slurry in the third storage tank, and when the aluminum foil is conveyed, the negative electrode slurry is sprayed on the solid electrolyte layer by 3D printing to obtain a first negative electrode material layer on the solid electrolyte layer; and is also used to spray the negative electrode slurry on the copper foil by 3D printing to obtain a second negative electrode material layer on the copper foil; The cutting mechanism is used to cut the battery cell and package it into a battery after the side of the copper foil having the second negative electrode material layer is covered on the first negative electrode material layer to obtain the battery cell.

9. The solid-state battery manufacturing system based on 3D printing according to claim 8, characterized in that: Also includes a curing mechanism; The curing mechanism is used to cure various sprayed slurries.

10. The solid-state battery manufacturing system based on 3D printing according to claim 8, characterized in that: Also includes a roller pressing mechanism; The rolling mechanism is used to roll the solidified slurry.

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