Advanced battery manufacturing technique

Abstract

The invention relates to a method, apparatus, and product for manufacturing lithium-ion batteries, employing a novel z-fold assembly approach with an integrated separator-anode structure. The method involves coating separator layers directly onto both sides of an anode sheet, forming a unified structure that is folded into a z-pattern with cathode sheets positioned between the folds. This innovative assembly technique eliminates the need for a separate separator layer and the die-cutting step for the anode, reducing the number of layers in the assembly process and streamlining manufacturing. By removing the necessity for separate separator placement, the invention reduces production complexity, minimizes risks of misalignment, and enhances assembly precision. The z-fold approach further optimizes the manufacturing workflow by minimizing scrap rates, increasing production speed, and simplifying operations. The integrated separator is composed of advanced materials, including polymers and ceramic-polymer hybrids, offering superior thermal stability, ionic conductivity, and mechanical strength. The invention also introduces an automated apparatus that integrates dual-sided coating, z-folding, and cathode placement processes. Equipped with precision alignment sensors and robust quality control systems, the apparatus ensures scalable, high-efficiency industrial production. Batteries produced using this approach exhibit enhanced cycling stability, reduced internal resistance, and higher energy density, coupled with significant improvements in safety and manufacturing efficiency. The invention is compatible with various battery chemistries, including lithium-ion, and supports applications in consumer electronics, electric vehicles, aviation, and energy storage systems.

Description

Advanced Battery Manufacturing Technique

[0001] The present invention pertains to the field of advanced battery technology, specifically to an advanced method and apparatus for manufacturing pouch-type battery cells. More particularly, the invention relates to a novel z-fold assembly process utilizing an integrated separator-anode structure that simplifies cell construction, enhances production efficiency, and improves battery performance and safety. This invention is applicable across diverse sectors, including consumer electronics, electric vehicles, and grid-level energy storage systems, where pouch-type batteries play a pivotal role.

[0002] Advanced battery technologies like lithium-ion batteries have emerged as the primary energy storage solution for a variety of applications due to their high energy density, reliability, and versatility. Despite their widespread adoption, the manufacturing of these batteries, particularly pouch cells, presents several challenges. Traditional methods rely on the sequential assembly of three separate components: the cathode, anode, and separator. These components are meticulously stacked or wound to form the cell, requiring precise alignment and significant manual intervention. Such processes are inherently complex and contribute to prolonged production cycles, higher operational costs, and increased material waste.

[0003] The separator, a critical component for preventing internal short circuits in battery cells, is traditionally manufactured using polyolefins such as polyethylene (PE) and polypropylene (PP). While these materials provide adequate performance for standard traditional applications, their inherent properties and the pore structure fall short of meeting the stringent requirements of modern high-performance batteries. Poor wettability with electrolytes, combined with insufficient and inconsistent interphase contact between layers, impedes ionic conductivity and compromises overall battery efficiency. Furthermore, uneven porosity in these separators can lead to irregular electrolyte distribution, resulting in reduced energy density and operational reliability.

[0004] In conventional cell assembly, the use of separate separator layers presents additional challenges. These layers are prone to displacement during the manufacturing process, leading to high scrap rates and diminished reliability of the final battery product. Addressing these issues necessitates the use of highly precise and expensive assembly equipment to ensure accurate stacking of layers, which significantly increases production costs. Additionally, this approach slows the overall manufacturing process, thereby hindering scalability and reducing efficiency.

[0005] The multi-layer nature of current manufacturing processes, involving separate handling of the cathode, anode, and separator, introduces inefficiencies across several stages. The need to handle each component individually increases the risk of misalignment, requiring rigorous quality control protocols and frequently resulting in substantial material waste. The reliance on die-cutting to prepare separator materials further exacerbates these inefficiencies, while manual adjustments to ensure proper alignment prolong production times and inflate operational costs. Compounding these challenges is the limited adoption of automation technologies, which constrains scalability and throughput, making it difficult to meet the growing demand for high-performance battery systems.

[0006] Performance constraints further undermine the effectiveness of conventional manufacturing methods. Interface resistance between separate layers increases energy losses, while uneven electrolyte distribution compromises the uniformity of current flow and energy density within the cell. Thermal management remains a persistent challenge; inadequate thermal stability of the separator materials exacerbates the risk of overheating, especially in high-energy or high-current applications. These limitations not only reduce the operational reliability of the batteries but also hinder their adoption in safety-critical applications such as electric vehicles and renewable energy systems.

[0007] Safety concerns represent one of the most significant challenges in lithium-ion battery manufacturing. The displacement of the separator during assembly or operation can result in direct contact between the anode and cathode, leading to internal short circuits. These short circuits, combined with the poor thermal stability of conventional separators, significantly increase the likelihood of thermal runaway events, particularly under high-stress or abuse conditions. Moreover, mechanical stress during cycling exacerbates separator displacement and further undermines the long-term reliability of the battery.

[0008] Various advancements have been proposed to tackle these challenges, such as the development of ceramic-coated separators to enhance thermal stability and the adoption of automated stacking systems to improve alignment and reduce material waste. While these solutions offer promising improvements, they often introduce increased complexity and higher costs, making them less practical for large-scale manufacturing. As a result, there is a pressing need for a more innovative approach—one that not only simplifies the manufacturing process but also boosts efficiency while ensuring the safety, scalability, and sustainability of advanced battery technologies.

[0009] The present invention introduces a transformative approach to the manufacturing of pouch-type cells by addressing the inefficiencies, limitations, and safety concerns inherent in current methods. At the core of the invention is the integration of the separator directly onto the anode sheet, forming a unified structure that encapsulates the anode with separator layers on both sides. This integrated separator-anode layer eliminates the need for separate handling of the separator during assembly, significantly reducing the complexity of the manufacturing process.

[0010] In conjunction with the integrated separator-anode layer, the invention employs a z-fold assembly method, wherein the unified structure is folded into a compact configuration with cathode sheets inserted between each fold. This z-fold arrangement not only streamlines the assembly process but also ensures precise alignment of components, minimizing the risks of misalignment and material waste that are common in conventional stacking or winding methods. The process is particularly suited to automation, enabling higher throughput and scalability for large-scale production.

[0011] The integrated separator-anode layer is produced through a dual-sided coating process, where separator materials are applied to both sides of an anode sheet using advanced techniques such as electrospinning, spraying, or roll-to-roll coating. The separator materials used in the invention include advanced polymers, ceramic-polymer hybrids, and nano-enhanced composites. These materials provide superior mechanical strength, enhanced thermal stability, and improved wettability, ensuring optimal performance and safety of the battery.

[0012] The z-fold assembly method is designed to address several critical challenges in battery manufacturing. By reducing the number of discrete components from four to two, the method simplifies material handling and eliminates the need for die-cutting step for anode and separator, reducing production step and time and lowering production costs. The integrated separator-anode approach and compact z-fold configuration minimizes interface resistance between layers, improving ionic conductivity and energy density. Furthermore, the encapsulation of the anode within the separator layers enhances mechanical stability, preventing separator displacement and reducing the risk of internal short circuits.

[0013] The invention also introduces an apparatus specifically designed to facilitate the manufacturing process. This apparatus includes a dual-sided coating system for the application of separator materials, an automated folding mechanism for z-pattern assembly, and a placement system for inserting cathode sheets. The apparatus is integrated with a control system that ensures precise coordination of these processes, enabling consistent quality and high efficiency.

[0014] The advantageous effects of the invention are manifold. The manufacturing process is significantly simplified, with a reduction in assembly time by up to 50% and a decrease in material waste by up to 40%. The batteries produced using this method exhibit enhanced performance characteristics, including improved cycling stability, reduced internal resistance, and higher energy density. Safety is markedly improved, with superior thermal stability and robust encapsulated approach minimizing the risk of thermal runaway or mechanical failure. Furthermore, the process is highly scalable, making it suitable for large-scale production in applications ranging from consumer electronics to electric vehicles.

[0015] In summary, the invention represents a paradigm shift in battery manufacturing. By integrating the separator with the anode and adopting a z-fold assembly method, the invention achieves unprecedented levels of efficiency, performance, and safety. It addresses the most pressing challenges in the field while paving the way for scalable and cost-effective production of high-performance batteries.

[0016] The invention will be better understood with reference to the following figures, which illustrate various aspects of the method, apparatus, and resulting products. The drawings are intended to complement and clarify the description of the invention, without limiting its scope.

[0017] : shows a schematic view of an exemplary typical dual-side coated anode electrode sheet without separator as used in conventional battery assembly methods.

[0018] : An alternative cross-sectional view of an exemplary typical dual-side coated anode electrode sheet without separator as used in conventional battery assembly methods.

[0019] : A perspective view of the dual-sided coating apparatus designed to produce the integrated separator-anode structure. The figure shows the positioning of the polymer solution nozzle system in both sides of the anode sheet, with a schematic representation of dual nozzles applying, spraying, or electrospinning separator materials onto both sides of the anode simultaneously.

[0020] : A cross-sectional schematic of the unified separator-anode sheet, where the anode is encapsulated by separator layers on both sides. This diagram illustrates the integration of the separator with the anode, highlighting the uniform coverage and edge encapsulation with the separator material.

[0021] : A schematic of the cathode sheet for pouch cells, which will be die-cut into individual cathode pieces and placed between the z-folded layers of the integrated separator-anode during cell assembly.

[0022] : A cross-sectional schematic of the z-fold assembly process, illustrating the stepwise folding of the integrated separator-anode structure with cathode sheets placed between the folds. This figure depicts the construction of a pouch cell battery using the unified separator-anode technology, showing a cross-sectional view of the pouch-type cell assembled via the novel z-fold method.

[0023] These figures collectively provide a comprehensive visual representation of the invention, aiding in the understanding of its components, processes, and benefits.

[0024] The invention introduces an integrated separator-anode structure that combines the anode and separator layers into a single, unified component. This structure is created by applying separator material directly onto both sides of the anode sheet. The encapsulation process ensures uniform coverage across the surface of the anode, including the edges, thereby eliminating the risks associated with separator displacement and misalignment in traditional designs.

[0025] The anode sheet comprises a current collector, typically made of a conductive metal such as copper, and a layer of anode active material. The active material may include graphite, silicon, hard carbon, or other advanced materials such as lithium titanate, lithium / sodium metal or silicon-carbon composites. The separator material is applied using advanced coating techniques, such as electrospinning, spraying, or roll-to-roll deposition.

[0026] shows a schematic view of a dual-side anode electrode sheet 100 for pouch cell batteries.

[0027] The anode electrode sheet 100 comprises current collector 101, tabs 102, and anode active material coated sections 103, each separated by a gap 101a. The current collector 101 is designed to be coated with a anode material in manufacturing process. The anode electrode sheet 100 includes tabs 102, which are used for electrical connections within the battery cell. These tabs 102 extend from the top edge of the current collector 101, providing points for connecting the anode to the external circuitry of the battery.

[0028] Additionally, the anode electrode sheet 100 includes anode active material coated sections 103, which serve as the primary components of the anode sheet 100. These sections 103 are crucial for participating in the electrochemical reactions during the battery's charge and discharge cycles.

[0029] The configuration of the anode electrode sheet 100, with the current collector 101, multiple anode active material coated sections 103, gaps 101a, and tabs 102, is designed to facilitate the subsequent coating of the separator material and the z-fold assembly process. This design aims to streamline and speed up the manufacturing process, reduce the risk of misalignment, and enhance the overall efficiency and performance of the pouch cell batteries.

[0030] shows another schematic view of a dual-side anode electrode sheet 100 for pouch cell batteries.

[0031] The anode electrode sheet 100 comprises a current collector 101, anode active material coated sections 103a and 103b, and gaps 101a and 101b. The current collector 101 serves as the foundational structure of the anode electrode sheet 100, providing mechanical support and electrical conductivity. The current collector 101 is designed to be coated with an anode material during the manufacturing process.

[0032] The anode active material coated sections 103a and 103b are applied on both sides of the current collector 101. These sections 103a and 103b participate in the electrochemical reactions during the battery's charge and discharge cycles. The dual-sided coating ensures that the anode electrode sheet 100 can effectively interact with the electrolyte and the cathode layers, enhancing energy density and the overall performance of the battery.

[0033] The gaps 101a are strategically placed between the anode active material coated sections 103a, and the gaps 101b are strategically placed between the anode active material coated sections 103b. These gaps provide necessary spacing to accommodate the folding process during the z-fold assembly method. The presence of these gaps ensures that the anode electrode sheet 100 can be folded without causing damage to the coated sections 103a and 103b, maintaining the integrity and functionality of the anode.

[0034] The configuration of the anode electrode sheet 100, with the current collector 101, anode active material coated sections 103a and 103b, and gaps 101a, is designed to facilitate the subsequent coating of the separator material and the z-fold assembly process. This design aims to streamline and speed up the manufacturing process, reduce the risk of misalignment, and enhance the overall efficiency and performance of the pouch cell batteries.

[0035] illustrates a schematic view of dual nozzles coating, spraying, or electrospinning separator materials on both sides of an anode electrode simultaneously. The anode sheet 100 moves down between the nozzles 206 and 208, which are positioned on either side of the anode sheet 100. The anode sheet 100 comprises a current collector 101 and anode active material coated sections 103a and 103b, separated by gaps 101a.

[0036] The nozzles 206 and 208 are configured to coat, spray, or electrospin separator materials or solutions onto both sides of the anode sheet 100. The nozzles 206 and 208 can range from one to thousands on each side, ensuring uniform and continuous application of the separator material. The nozzles 206 and 208 are equipped with outlets 206a and 208a, respectively, through which the separator material is dispensed.

[0037] As the anode sheet 100 moves downward, nozzles 206 and 208 apply separator material, forming a coated layer 202a on the front and a coated layer 202b on the back. The process continues, coating the gaps 202c and 202d, and even the edges of the anode sheet 100, entirely encapsulating it with the separator material. This results in a unified separator-anode sheet 200, which is the anode integrated or encapsulated with separator layers.

[0038] The dual nozzle system ensures that the separator material is evenly distributed on both sides of the anode sheet 100, creating an integrated anode-separator structure. This integrated structure is required for the subsequent z-fold assembly process, where the anode-separator structure is folded in a z-pattern, and cathode layers are placed between the folds.

[0039] The configuration of the nozzles 206 and 208, along with the movement of the anode sheet 100, is designed to streamline the coating process of the separator materials or solution, on both side of the anode sheet 100 simultaneously. The use of dual nozzles ensures that the separator material is applied uniformly, providing consistent quality and performance in the final battery assembly.

[0040] shows a schematic of the unified separator-anode sheet, which is the anode sheet encapsulated with separator layers on both sides.

[0041] The unified separator-anode sheet 200 comprises a current collector 101, anode active material coated sections 103a and 103b, and gaps 101a and 101b. The current collector 101 serves as the foundational structure, providing mechanical support and electrical conductivity. The anode active material coated sections 103a and 103b are applied on both sides of the current collector 101. These sections participate in the electrochemical reactions during the battery's charge and discharge cycles.

[0042] The separator layers 202a and 202b are coated on both sides of the anode active material coated sections 103a and 103b, respectively. These separator layers encapsulate the anode, ensuring uniformity and reducing the risk of misalignment during the assembly process. The gaps 101a are strategically placed between the anode active material coated sections 103a and the gaps 101b are strategically placed between the anode active material coated sections 103b, providing necessary spacing to accommodate the folding process during the z-fold assembly method.

[0043] The separator layers 202a and 202b extend over the edges of the anode active material coated sections 103a and 103b, forming a continuous encapsulation. This encapsulation includes the gaps 202c and 202d, ensuring that the entire anode sheet is uniformly covered with the separator material. The presence of these gaps ensures that the anode sheet can be folded without causing damage to the coated sections, maintaining the integrity and functionality of the anode.

[0044] The configuration of the unified separator-anode sheet, with the current collector 101, anode active material coated sections 103a and 103b, separator layers 202a and 202b, and gaps 101a, is designed to facilitate the subsequent z-fold assembly process. This design aims to streamline and speed up the manufacturing process, reduce the risk of misalignment, and enhance the overall efficiency and performance of the pouch cell batteries.

[0045] shows a schematic of a cathode sheet 300 for pouch cell batteries.

[0046] The cathode sheet 300 comprises a current collector 302 and cathode active material coated sections 304a and 304b. The current collector 302 serves as the foundational structure of the cathode sheet 300, providing mechanical support and electrical conductivity. The current collector 302 is designed to be coated with a cathode material during the manufacturing process.

[0047] The cathode active material coated sections 304a and 304b are applied on both sides of the current collector 302. These sections 304a and 304b participate in the electrochemical reactions during the battery's charge and discharge cycles. The dual-sided coating ensures that the cathode sheet 300 can effectively interact with the electrolyte and the anode layers, enhancing energy density and the overall performance of the battery.

[0048] shows the construction of a pouch cell battery using unified separator-anode technology. It provides a cross-sectional view of the pouch-type cell assembled using the z-fold method.

[0049] The figure illustrates the unified separator-anode sheet 200, which comprises a current collector 101, anode active material coated sections 103a and 103b, and separator layers 202a and 202b. The anode active material coated sections 103a and 103b are encapsulated by the separator layers 202a and 202b, forming an integrated structure.

[0050] The unified separator-anode sheet 200 is folded in a z-pattern, with the gaps 101a providing necessary spacing to accommodate the folding process. The cathode sheets 300, which include a current collector 302 and cathode active material coated sections 304a and 304b, are placed between the folds of the unified separator-anode sheet 200.

[0051] This z-fold assembly method ensures that the cathode and anode layers are in close proximity, enhancing ion transfer efficiency and improving the overall electrochemical performance of the battery. The configuration of the unified separator-anode sheet 200 and the cathode sheets 300 is designed to streamline the manufacturing process, reduce the risk of misalignment, and enhance the overall efficiency and performance of the pouch cell batteries.

[0052] The z-fold assembly process represents a significant departure from traditional stacking or winding techniques. In this method, the integrated separator-anode structure is folded into a compact z-pattern, with pre-cut cathode sheets inserted between each fold. This configuration reduces the number of layers in the cell from four to two, simplifying assembly and minimizing alignment errors.

[0053] The folding process is carried out using an automated folding mechanism equipped with precision alignment sensors. These sensors ensure that each fold is accurately positioned, maintaining uniform spacing between the layers and minimizing the risk of misalignment. The cathode sheets, composed of a current collector (aluminum) and a cathode active material (e.g., lithium cobalt oxide, lithium iron phosphate, nickel manganese cobalt oxides, etc.), are inserted between the folds to complete the cell structure.

[0054] Once the folding process is complete, the folded stack is enclosed in a pouch, and the edges are sealed using thermal or ultrasonic sealing methods. This creates a compact, lightweight, and robust battery that is highly resistant to mechanical stress and thermal damage.

[0055] The apparatus designed for this invention integrates multiple components to streamline the manufacturing process. It includes:The dual-sided coating system utilizes a roll-to-roll mechanism to efficiently convey the anode sheet through the coating apparatus. Multi-channel nozzles are employed to deliver polymer solutions and compressed air, enabling the formation of uniform separator layers on both sides of the anode. The system features adjustable parameters, including solution flow rate, air pressure, and nozzle-to-substrate distance, allowing for precise customization of separator properties to meet specific performance requirements.The automated folding mechanism can be equipped with servo motors and alignment sensors to ensure precise z-pattern folding of the integrated separator-anode structure. This mechanism is designed to accommodate a range of fold widths and layer thicknesses, providing the flexibility needed to support various battery configurations and designs.The cathode placement unit can feature robotic arms equipped with vacuum grippers to position the cathode sheets between the folds of the integrated separator-anode structure with high precision. This unit can further be supported by a feeding mechanism that efficiently supplies pre-cut cathode sheets to the assembly line, ensuring smooth and continuous operation.The control system comprises a centralized unit designed to coordinate the operations of the coating, folding, and placement units seamlessly. It incorporates integrated quality control measures, including optical inspection and thickness measurement, to maintain consistent production quality and ensure the reliability of the manufacturing process.

[0056] The invention allows for the use of a wide range of materials to meet diverse performance requirements. These include:Composite Separators: Combining polymers with ceramic nanoparticles for enhanced thermal and mechanical properties.Multi-Layer Separators: Applying multiple separator layers with varying porosities and thicknesses to optimize ionic conductivity and shutdown feature.

[0057] The invention comprises a separator that is either coated or spun on both sides of the anode electrode, encapsulating the anode. The materials for the separator include, but are not limited to, polymers such as polyimide, polyvinylidene fluoride (PVDF), and polyethylene oxide (PEO), polyimide, polyamide 6 and 6,6, hyaluronic acid (HA), polypropylene (PP), polyethylene (PE), polyester (PE), polyaramid, polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), polyethylene terephthalate (PET), polyaniline (PANI), polyethylene oxide (PEO), styrene butadiene rubber (SBR), polystyrene (PS), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), poly(lactic acid) (PLA), polyurethanes (PU), polysiloxanes or silicones, polyvinyl pyrrolidone (PVP), polysulfide, polycaprolactones, poly (methyl methacrylate) (PMMA), polyacrylamide (PAM), polyglycolides (PGA), poly (lactide-coglycolides) (PLGA), polylactides, poly (acrylic acid) , polybutene, cyclic polyolefins, and combinations thereof, ceramic materials include , but are not limited to, nanoclaies, silica (SiO2), alumina (Al2O3), titanium oxide(TiO2), magnesium oxide (MgO), and combinations thereof, and other additives.

[0058] The separator materials are selected to optimize performance and safety. Ceramic-polymer composites, incorporating nanoparticles are used to enhance thermal stability and improve mechanical robustness. The separator layers can also be tailored to have varying porosity, thickness, and surface morphology to meet specific performance requirements.

[0059] The z-fold assembly process can be adapted to accommodate different cell designs. For example:Hybrid Folding Schemes: Combining z-folding with stacking for specific applications requiring higher energy density.Segmented Structures: Dividing the integrated separator-anode structure into smaller segments for use in modular battery designs.Gradient Coating: Applying separator layers with gradient properties to optimize electrolyte absorption and ion transport.

[0060] The batteries produced using this invention exhibit several performance advantages, including reduced interface resistance, improved cycling stability, and higher energy density. Safety is significantly enhanced through robust separator encapsulation, preventing short circuits and thermal runaway. The mechanical stability of the integrated structure ensures reliability under extreme conditions, such as high discharge rates or elevated temperatures.

[0061] The present invention demonstrates significant industrial applicability in the manufacturing of advanced battery cells for various applications. By introducing a novel z-fold assembly method with an integrated separator-anode structure, the invention addresses critical challenges in the production of high-performance batteries. The method's streamlined approach significantly reduces manufacturing complexity, minimizes material waste, and enhances production speed, making it highly suitable for large-scale industrial deployment.

[0062] The invention’s versatility allows its adoption across a wide range of battery chemistries, including lithium-ion, sodium-ion, zinc-ion, aluminum-ion, sulfur-based, metal-based, and air-based chemistries. This adaptability ensures its relevance to diverse industries, including consumer electronics, electric vehicles, renewable energy storage, aviation, and portable devices, among others.

[0063] Furthermore, the ability of the integrated separator-anode structure to be used in multiple cell geometries—including pouch, cylindrical, prismatic, and cubic configurations—expands its applicability, enabling manufacturers to optimize their processes for various product designs. The elimination of separate separator placement and the die-cutting step, coupled with reduced scrap rates and precise alignment during assembly, significantly lowers production costs and increases yield.

[0064] The automated apparatus introduced with this invention incorporates dual-sided coating, z-folding, and cathode placement processes, supported by precision alignment sensors and integrated quality control systems. This setup is designed for scalability, making it ideal for high-throughput manufacturing environments. By improving efficiency, safety, and performance while reducing costs, the invention is positioned to meet the growing demand for sustainable and high-quality energy storage solutions in a competitive market.

[0065] The invention also aligns with environmental sustainability objectives by reducing material waste, optimizing energy consumption during manufacturing, and enabling the use of recyclable materials. Its adaptability to emerging battery technologies ensures long-term relevance, making it a vital contribution to the global transition towards cleaner energy systems.

Claims

A method for manufacturing a pouch-type battery, comprising:(a) providing an anode sheet comprising a current collector and anode active material;(b) forming an integrated separator-anode structure by:(i) applying a first separator layer on a first side of the anode sheet;(ii) applying a second separator layer on a second side of the anode sheet;wherein the first and second separator layers encapsulate the anode active material;(c) folding the integrated separator-anode structure in a z-pattern;(d) inserting cathode sheets between folds of the integrated separator-anode structure; and(e) enclosing the folded structure in a pouch.An apparatus for manufacturing a pouch-type battery, comprising:(a) a dual-sided coating system configured to apply separator material to both sides of an anode sheet;(b) an automated folding mechanism configured to form z-pattern folds in the coated anode sheet;(c) a cathode placement system configured to insert cathode sheets between the z-pattern folds; and(d) a control system configured to coordinate the operations of the coating, folding, and placement systems.A pouch-type battery comprising:(a) an integrated separator-anode structure comprising:(i) an anode sheet;(ii) separator layers encapsulating the anode sheet;(b) the integrated separator-anode structure arranged in a z-fold pattern;(c) cathode sheets positioned between folds of the integrated separator-anode structure; and(d) a sealed pouch containing the folded structure.The method of claim 1, wherein the separator material include, but are not limited to, polymers such as polyimide, polyvinylidene fluoride (PVDF), and polyethylene oxide (PEO), polyimide, polyamide 6 and 6,6, hyaluronic acid (HA), polypropylene (PP), polyethylene (PE), polyester (PE), polyaramide, polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), polyethylene terephthalate (PET), polyaniline (PANI), polyethylene oxide (PEO), styrene butadiene rubber (SBR), polystyrene (PS), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), poly(lactic acid) (PLA), polyurethanes (PU), polysiloxanes or silicones, polyvinyl pyrrolidone (PVP), polysulfide, polycaprolactones, poly (methyl methacrylate) (PMMA), polyacrylamide (PAM), polyglycolides (PGA), poly (lactide-coglycolides) (PLGA), polylactides, poly (acrylic acid) , polybutene, cyclic polyolefins, and combinations thereof,5.The method of claim 1, wherein the separator material further comprises ceramic nanoparticles, include, but are not limited to, nanoclaies, silica (SiO2), alumina (Al2O3), titanium oxide (TiO2), magnesium oxide (MgO), and combinations thereof.The method of claim 1, wherein the first and second separator layers are applied using roll-to-roll electrospinning, spraying, or other coating techniques.The method of claim 1, wherein the folding in step (c) is performed using an automated folding mechanism with precision alignment sensors.The method of claim 1, further comprising:(i) monitoring the thickness of the separator layers during the coating process;(ii) adjusting the coating parameters to maintain uniformity.The apparatus of claim 2, wherein the automated folding mechanism includes servo motors and an alignment control system for precise folding.The apparatus of claim 2, further comprising a thermal sealing unit for enclosing the folded structure within a pouch.The battery of claim 3, wherein the separator layers have varying porosities and thicknesses to optimize electrolyte absorption and ionic conductivity.The battery of claim 3, wherein the cathode sheets comprise a current collector made of aluminum and a cathode active material selected from lithium cobalt oxide (LCO), lithium iron phosphate (LFP), nickel manganese cobalt oxides (NMC), etc.A method for manufacturing a battery, wherein the integrated separator-anode structure is produced by simultaneously coating separator layers on both sides of the anode sheet using a multi-channel nozzle system.The apparatus of claim 2, further configured to produce batteries with modified z-fold patterns for enhanced energy density.The lithium-ion battery of claim 3, wherein the integrated separator-anode structure is coated with a nano-enhanced material to improve thermal and mechanical properties.A method for manufacturing a battery, further comprising:conducting in-line quality control inspections during the coating and folding processes;rejecting defective layers to reduce material waste.The integrated separator-anode structure as described in any of the preceding claims, wherein the structure is not limited to use in pouch-type cells but is applicable to battery cells of various geometries, including, but not limited to, cylindrical, prismatic, pouch, cubic, and other geometrical configurations.The method, apparatus, and product as described in any of the preceding claims, wherein the invention is applicable to rechargeable and non-rechargeable batteries with different chemistries, including but not limited to: lithium-ion (Li-ion), sodium-ion (Na-ion), zinc-ion (Zn-ion), aluminum-ion (Al-ion), sulfur-based chemistries such as sodium-sulfur, lithium-sulfur, potassium-sulfur, zinc-sulfur, and aluminum-sulfur, metal-based chemistries such as sodium metal, lithium metal, potassium metal, zinc metal, and aluminum metal, and air-based chemistries such as sodium-air, lithium-air, potassium-air, zinc-air, and aluminum-air.

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