Preparation and application of solid-state battery with linear columnar pixel-level bipolar structure

Abstract

The invention belongs to the technical field of solid-state batteries, and particularly relates to a brand-new solid-state battery appearance structure, a battery cell structure, a battery preparation process and a battery manufacturing process. The appearance structure is characterized in that the overall appearance of the battery is in a linear slender strip-shaped cylindrical or polygonal small battery appearance form; the battery has the function of a single independent battery, can be flexibly assembled into a battery stack in any form, and can also be a filling battery in a narrow special-shaped space; the battery cell structure is formed by adopting single and simple battery cell layer mold forming coating equipment, utilizing a mode that a plurality of battery cell layer mold forming coating equipment are connected in series, taking a central composite three-dimensional current collector core as a center, and directly stacking and coating a plurality of layers of positive electrodes, a plurality of layers of electrolyte, a plurality of layers of negative electrodes and a plurality of layers of current collectors according to a circle-by-layer production line of the bipolar battery structure. Through the design of the small ultrathin ring layer of the solid-state battery, the device is simple, and the battery performance is more stable and more reliable.

Description

Technical Field

[0001] This invention belongs to the field of solid-state battery technology, specifically relating to the battery morphology, characteristics, cell structure, battery stack structure, manufacturing equipment and production line preparation method and application of a linear columnar pixel-level bipolar solid-state battery. Background Technology

[0002] With the rapid development of the green energy industry, the demand for high-performance energy storage devices has surged in fields such as electric vehicles, portable electronic devices, and energy storage systems. All-solid-state batteries, due to their advantages of high safety and high energy density, have become a key research and development direction in the battery field.

[0003] Current all-solid-state batteries are fabricated using a "sandwich" stacked pouch structure. The entire process involves roll-to-roll fabrication, using rolling and coating to prepare the positive electrode, electrolyte membrane, and negative electrode. These are then bonded together using rolling and hot-pressing to form the "sandwich" stacked pouch structure. Each step of this process is extremely complex and cumbersome, requiring bulky and expensive equipment, resulting in a high cost-to-performance ratio. Furthermore, achieving the required thickness, uniformity, and consistency in the produced electrode sheets and electrolyte membrane is extremely difficult. These factors present significant technical bottlenecks in achieving high battery yield, energy density, cycle life, and solid-solid contact.

[0004] Existing all-solid-state battery pouches cannot be miniaturized, which is not feasible for small aircraft, small artificial intelligence entities, small detectors, small electrical equipment, and special small-scale electrical applications such as humanoid robots, unmanned aerial vehicles, keys, circuit boards, and remote controls.

[0005] Current solid-state battery pouches are manufactured by stacking dozens or hundreds of layers and then sealing them under high pressure to form a single pouch. The battery electrodes inside the pouch cannot effectively dissipate heat, which can easily cause overheating and localized thermal runaway under high-rate charging and discharging, damaging the internal structure of the battery electrodes and even causing disasters. Summary of the Invention

[0006] To address the aforementioned shortcomings in the existing technology, this invention provides a linear columnar pixel-level bipolar solid-state battery, a novel cell structure fabrication method and process, and a complete direct-attach production line, thereby solving the problems mentioned in the background technology.

[0007] To address the aforementioned technical problems, this invention specifically provides a linear cylindrical pixel-level bipolar solid-state battery. The "linear cylindrical" refers to the battery's shape, characterized by an overall appearance that resembles a linear, elongated cylindrical or polygonal small battery. The "pixel-level" refers to a single linear cylindrical small battery, which functions independently and can be used as a standalone battery or assembled into a battery pack or stack. Each individual linear cylindrical small battery possesses pixel-level flexibility and adaptability within the battery pack or stack, allowing for various combinations to form shapes such as rectangles, squares, rhombuses, triangles, circles, and rings. It can also serve as filler batteries for excess or irregularly shaped spaces, saving space for electrical equipment. In assembling the battery stack or pack, the linear cylindrical small battery individuals appear as small cylinders or polygons, arranged in a honeycomb pattern to facilitate airflow. Each individual small battery has space for heat dissipation, effectively mitigating the heat generated by the battery stack or pack. The cell structure is characterized by the following: The linear cylindrical small battery unit is constructed with a central composite three-dimensional current collector core as its center. Multiple layers of dry powder positive electrode, dry powder electrolyte, dry powder negative electrode, and dry powder current collector are arranged in a series or parallel structure, similar to a bipolar battery. Various solid-state battery materials are stacked and coated layer by layer in a direct-coating production line manner. Each layer is then compacted using ultrasonic forging. The direct-coating production line is characterized by employing a single, simple cell layer mold forming and coating device, with multiple such devices connected in series. By designing solid-state batteries into linear, cylindrical, small, and ultra-thin concentric layers, the manufacturing equipment will abandon the original cumbersome and expensive manufacturing processes such as coating, film making, rolling, winding, hot pressing, slicing, stacking, and isostatic pressing. Instead, it will adopt a multi-layer online direct coating cell layer mold forming and coating equipment manufacturing process. This will enable the manufacturing of ultra-thin concentric layer processes, composite concentric layer processes, gradient concentric layer processes, three-dimensional concentric layer processes, and ultra-thin electrolyte membrane processes. Solving the solid-solid interface problem and cycle life problem of solid-state batteries will become simpler, easier, and faster, resulting in more stable and reliable battery performance.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a linear cylindrical pixel-level bipolar solid-state battery. It includes: a linear cylindrical small battery individual, a series or parallel bipolar battery structure inside the linear cylindrical small battery individual, sealant at both ends of the linear cylindrical small battery individual, a positive electrode tab at the positive end of the linear cylindrical small battery individual, and a negative electrode tab wrapping layer around the entire linear cylindrical small battery individual.

[0009] Secondly, the present invention provides a single, simple production line for a cell layer mold forming and coating equipment. Its characteristic is that by connecting multiple cell layer mold forming and coating equipment in series, a bipolar cell structure solid-state battery is manufactured, with a central composite three-dimensional current collector core as the center, and layers wrapped and coated one after another.

[0010] The linear columnar shape mentioned in this invention refers to the shape of the battery, characterized in that: the overall appearance of the battery presents a linear, slender, cylindrical or polygonal small battery shape.

[0011] The pixel-level feature of this invention is that each individual linear cylindrical small battery has an independent battery function and can be used as a battery on its own. At the same time, it has a flexible and versatile configuration function at the pixel level in the assembly of battery packs or battery stacks, which can be arbitrarily combined to form various shapes. It can also be used as a filler battery for extra space or narrow and irregularly shaped spaces, saving space for electrical equipment.

[0012] The linear cylindrical small battery internal series bipolar battery structure of this invention includes: a central composite three-dimensional current collector core, a first-ring positive electrode layer, a first-ring electrolyte layer, a first-ring negative electrode layer, a first-ring current collector layer, a second-ring positive electrode layer, a second-ring electrolyte layer, a second-ring negative electrode layer, a second-ring current collector layer, a third-ring positive electrode layer, a third-ring electrolyte layer, a third-ring negative electrode layer, an nth-ring current collector layer, an nth-ring positive electrode layer, an nth-ring electrolyte layer, an nth-ring negative electrode layer (n>3), and an outermost negative electrode tab wrapping layer. The internal structure of the linear cylindrical small battery is characterized by wrapping and covering the aforementioned electrode layers in a ring-like sequence, with the central composite three-dimensional current collector core as the center, to form a bipolar stacked series internal structure.

[0013] The linear cylindrical small battery internal parallel bipolar battery structure of this invention includes: a central composite three-dimensional current collector core, a first-ring positive electrode layer, a first-ring electrolyte layer, a first-ring negative electrode layer, a first-ring current collector layer, a second-ring negative electrode layer, a second-ring electrolyte layer, a second-ring positive electrode layer, a second-ring current collector layer, a third-ring positive electrode layer, a third-ring electrolyte layer, a third-ring negative electrode layer, an nth-ring current collector layer, an nth-ring negative electrode layer, an nth-ring positive electrode layer, an nth-ring electrolyte layer, an nth-ring negative electrode layer (n>3), and an outermost negative electrode tab wrapping layer. The internal structure of the linear cylindrical small battery is characterized by wrapping and covering the aforementioned electrode layers in a ring-by-ring, layer-by-layer manner, with the central composite three-dimensional current collector core as the center, to form a bipolar stacked parallel internal structure.

[0014] The sealing at both ends of the linear cylindrical small battery described in this invention includes: positive terminal sealing and negative terminal sealing.

[0015] The positive electrode tab at the upper end of the linear cylindrical small battery of the present invention includes: a series positive electrode tab and a parallel positive electrode tab. The series positive electrode tab is welded to the central composite three-dimensional current collector core; the parallel positive electrode tab is welded to both the central composite three-dimensional current collector core and the current collector layer between the two positive electrode layers.

[0016] The negative electrode tab wrapping layer surrounding the linear cylindrical small battery of this invention comprises: a series negative electrode tab wrapping layer, a parallel negative electrode tab wrapping layer, and a negative electrode parallel ring. The series negative electrode tab wrapping layer is bonded to the outermost negative electrode material; the parallel negative electrode tab wrapping layer is bonded to the outermost negative electrode material, and the negative electrode parallel ring is welded to the outer negative electrode material and also to the current collector layer between the two negative electrode layers.

[0017] The battery cell layer molding and coating equipment production line of this invention includes: battery cell layer molding and coating equipment for each ring, a battery cell traction component, and a current collector core conveying component at the front end of the production line. Its characteristic is that each ring of battery cell layer molding and coating equipment coats only one layer of corresponding powder material onto the central battery cell. Through the conveying component of the current collector core, the material passes sequentially through each set of battery cell layer molding and coating equipment, layer by layer, directly coating and assembling the required battery structure along the production line.

[0018] The battery cell layer forming and coating equipment of this invention includes: a battery cell layer coating mold assembly, an ultrasonic forging die head, ultrasonic equipment, and a composite mixing pipeline; the battery cell layer coating mold assembly includes: a battery cell positioning and guiding mold, an extrusion cavity, an ultrasonic isolation block, and a coating layer forming mold. Its characteristic is that: the composite mixture enters the extrusion cavity through the composite mixing pipeline by extrusion; the pressurized composite mixture is coated onto the central battery cell that has passed through the battery cell positioning and guiding mold under pressure; when the central battery cell coated with the composite mixture passes through the coating layer forming mold, the external ultrasonic equipment forges and compacts it; forming a direct-coating layer of electrode layers on the production line.

[0019] The present invention is further described below.

[0020] 1. The first, second, and nth positive electrode layers of the internal structure of the linear cylindrical small battery described in this invention are not necessarily limited to a single positive electrode material layer. They can be multi-layer composite positive electrode layers or multi-layer gradient positive electrode layers.

[0021] 2. The first, second, and nth negative electrode layers of the internal structure of the linear columnar small battery described in this invention are not necessarily limited to a single negative electrode material; they can be multi-layer composite negative electrode layers or multi-layer gradient negative electrode layers.

[0022] 3. The linear cylindrical small battery of the present invention has a first positive electrode layer, a second positive electrode layer to an nth positive electrode layer in its internal structure; the thickness of the positive electrode layer of each layer decreases in a decreasing gradient.

[0023] 4. The linear cylindrical small battery of the present invention has a first layer of negative electrode layer, a second layer of negative electrode layer to an nth layer of negative electrode layer; the thickness of the negative electrode layer of each layer decreases in a decreasing gradient.

[0024] This invention provides a linear columnar pixel-level bipolar solid-state battery with the following advantages.

[0025] 1. This invention provides a linear cylindrical pixel-level bipolar solid-state battery. Each individual linear cylindrical battery possesses the complete functionality of a single battery and can be used as a single pixel-level battery. It is suitable for small aircraft, small artificial intelligence devices, small detectors, small electrical equipment, and special small-scale power applications such as humanoid robots, unmanned aerial vehicles, keys, circuit boards, and remote controls. It can also be assembled into battery packs or battery stacks. Each individual linear cylindrical battery has pixel-level configuration capabilities within the entire battery pack or stack, allowing the battery pack or stack to be arbitrarily combined into various shapes, such as rectangles, squares, rhombuses, triangles, circles, and rings. It can also serve as a filler battery for excess space or small, irregularly shaped spaces, saving space for electrical equipment. Each individual linear cylindrical battery exhibits pixel-level flexibility, adaptability, and versatile combinability.

[0026] 2. This invention provides a linear columnar pixel-level bipolar solid-state battery. In the combined battery stack or pack, the individual linear columnar small batteries are small cylinders or polygons in appearance. When arranged, they present a honeycomb-like gap, which is conducive to air circulation. Each independent small battery has space for heat dissipation, which plays a good role in heat dissipation for the battery stack or battery pack.

[0027] 3. This invention provides a linear columnar pixel-level bipolar solid-state battery, manufactured using a single, simple cell layer mold forming and coating device, with multiple cell layer mold forming and coating devices connected in series. Through the linear columnar, small, ultra-thin layered design of the solid-state battery, the manufacturing equipment abandons the original cumbersome and expensive manufacturing processes such as coating, film making, rolling, winding, hot pressing, slicing, stacking, and isostatic pressing. It adopts a multi-layer online direct coating cell layer mold forming and coating process, enabling the manufacturing of ultra-thin layer processes, composite layer processes, gradient layer processes, three-dimensional layer processes, and ultra-thin electrolyte membrane processes. Solving the solid-solid interface problem and cycle life problem of solid-state batteries will become simpler, easier, and faster, resulting in more stable and reliable battery performance.

[0028] 4. This invention provides a linear columnar pixel-level bipolar solid-state battery. The length of a single independent small battery is not limited and can be adjusted according to the electrical equipment and location. Attached Figure Description

[0029] Figure 1 Schematic diagram of the individual linear cylindrical small battery of this invention Figure 2 Schematic diagram of a cross-section of a linear cylindrical small battery individual connected in series with a bipolar cell according to the present invention. Figure 3 Schematic diagram of the positive electrode cross-section of a linear cylindrical small battery individual connected in series bipolar cell according to the present invention. Figure 4 Schematic diagram of a cross-section of a linear cylindrical small battery unit connected in parallel with a bipolar battery according to the present invention. Figure 5 Schematic diagram of the positive electrode cross-section of a linear cylindrical small battery unit connected in parallel with a bipolar battery according to the present invention. Figure 6 Schematic diagram of the negative electrode cross-section of a linear cylindrical small battery unit connected in parallel with a bipolar battery according to the present invention. Figure 7 Schematic diagram of a manufacturing line with multiple units connected in series according to the present invention Figure 8 Schematic diagram of the single-cell layer forming and coating equipment of the present invention Figure 9 Schematic diagram of the mold assembly of the battery cell layer forming and coating equipment of the present invention Figure 10 Schematic diagram of the mold assembly of the battery cell layer forming and coating equipment of the present invention (cross section). Among them: 100. Negative electrode tab wrapping layer; 101. Positive electrode sealant; 102. Negative electrode sealant; 103. Series positive electrode tab; 104. Parallel positive electrode tab; 105. Negative electrode parallel ring. Among them: 200. Central composite three-dimensional current collector core; 201. First layer positive electrode layer; 202. First layer electrolyte layer; 203. First layer negative electrode layer; 204. First layer current collector layer; 205. Second layer positive electrode layer; 206. Second layer electrolyte layer; 207. Second layer negative electrode layer; 208. Second layer current collector layer; 209. Third layer positive electrode layer; 210. Third layer electrolyte layer; 211. Third layer negative electrode layer; 212. Dual positive electrode structure; 213. Dual negative electrode structure. Among them: 300. First layer battery cell mold forming and coating equipment; 301. Second layer battery cell mold forming and coating equipment; 302. Third layer battery cell mold forming and coating equipment; 303. Fourth layer battery cell mold forming and coating equipment; 304. Fifth layer battery cell mold forming and coating equipment; 305. Sixth layer battery cell mold forming and coating equipment; 306. Seventh layer battery cell mold forming and coating equipment; 307. Eighth layer battery cell mold forming and coating equipment; 308. Nth layer battery cell mold forming and coating equipment (arrow direction); 309. Battery cell traction assembly; 310. Current collector core conveying assembly. Among them: 311. Ultrasonic forging die head; 312. Battery cell layer coating die assembly; 313. Ultrasonic equipment; 314. Composite mixing pipe; 315. Coating layer forming die; 316. Ultrasonic isolation block; 317. Extrusion cavity; 318. Battery cell positioning and guiding die. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The accompanying drawings are for illustrative purposes only and represent schematic diagrams rather than actual physical objects. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] Based on the existing appearance and cell structure of solid-state batteries, achieving efficient mass production of high-quality, high-energy-density, long-life, and highly stable solid-solid interface solid-state batteries requires significant time and financial investment. Relying on cumbersome, expensive, and traditional manufacturing processes such as coating, film making, rolling, winding, hot pressing, slicing, stacking, and isostatic pressing will lead to substantial time and financial commitments. Furthermore, the interface problem remains unavoidable when using a "sandwich" stacking method for soft-pack battery packs, as the cells or films are made first. Soft-pack stacked battery packs also lack ventilation and heat dissipation, leading to localized heat accumulation during charging and discharging, which poses potential risks of material performance degradation and safety hazards.

[0033] This invention provides a novel solid-state battery form and a production line-direct-attached bipolar battery string and parallel cell structure preparation method, process, and a single, simple cell layer mold forming and coating equipment and a manufacturing line with multiple units connected in series.

[0034] 1. The solid-state battery described herein has the following appearance: Figure 1As shown, the overall appearance presents a linear, slender, cylindrical or polygonal small battery shape, including: the outermost negative electrode tab wrapping layer 100, the positive electrode sealant 101, the negative electrode sealant 102, the series positive electrode tab 103, the parallel positive electrode tab 104, and the negative electrode parallel ring 105.

[0035] 2. The aforementioned bipolar battery string and parallel cell structure is as follows: Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the internal structure of the battery cell is a bipolar stacked series and parallel structure composed of layers. This includes: a central composite three-dimensional current collector core 200, a first-ring positive electrode layer 201, a first-ring electrolyte layer 202, a first-ring negative electrode layer 203, a first-ring current collector layer 204, a second-ring positive electrode layer 205, a second-ring electrolyte layer 206, a second-ring negative electrode layer 207, a second-ring current collector layer 208, a third-ring positive electrode layer 209, a third-ring electrolyte layer 210, a third-ring negative electrode layer 211, an nth-ring current collector layer, an nth-ring positive electrode layer, an nth-ring electrolyte layer, an nth-ring negative electrode layer, and an outermost negative electrode tab wrapping layer 100.

[0036] 3. The aforementioned manufacturing line with multiple units connected in series, such as... Figure 7 As shown: The overall production line is composed of n battery cell layer mold forming and coating equipment, including: first layer battery cell layer mold forming and coating equipment 300, second layer battery cell layer mold forming and coating equipment 301, third layer battery cell layer mold forming and coating equipment 302, fourth layer battery cell layer mold forming and coating equipment 303, fifth layer battery cell layer mold forming and coating equipment 304, sixth layer battery cell layer mold forming and coating equipment 305, seventh layer battery cell layer mold forming and coating equipment 306, eighth layer battery cell layer mold forming and coating equipment 307, nth layer battery cell layer mold forming and coating equipment 308 (in the direction of the arrow), and battery cell traction assembly 309 and front-end current collector core conveying assembly 310 between each group of equipment.

[0037] 4. The battery cell layer mold forming and coating equipment, such as... Figure 8 , Figure 9 , Figure 10 As shown, the equipment employs powder extrusion coating of electrode materials combined with ultrasonic forging to manufacture a layered battery cell structure, including: an ultrasonic forging die head 311, a battery cell layer coating mold assembly 312, and an ultrasonic device 313. The battery cell layer coating mold assembly 312 includes: a composite mixing pipe 314, a coating layer forming mold 315, an ultrasonic isolation block 316, an extrusion cavity 317, and a battery cell positioning and guiding mold 318.

[0038] Example 1 illustrates the manufacturing process of a series bipolar battery.

[0039] Step 1: As Figure 7 As shown: The central composite three-dimensional current collector core 200 is conveyed and pulled by the current collector core conveying component 310 and the cell traction component 309, and sequentially passes through the first cell layer mold forming and covering equipment 300, the second cell layer mold forming and covering equipment 301, the third cell layer mold forming and covering equipment 302, the fourth cell layer mold forming and covering equipment 303, the fifth cell layer mold forming and covering equipment 304, the sixth cell layer mold forming and covering equipment 305, the seventh cell layer mold forming and covering equipment 306, the eighth cell layer mold forming and covering equipment 307, and the nth cell layer mold forming and covering equipment 308 (n>3) in the direction of the arrow, forming a continuous cell layer mold forming and covering equipment line.

[0040] The second step involves using traditional dry mixing, fiberization, dispersing, and granulation processes to prepare various dry powder raw materials, such as nano-sized positive electrode active material, negative electrode active material, electrolyte, conductive agent, binder, and metal current collector, according to the positive electrode, negative electrode, electrolyte, and current collector formulations. These materials are then transported through the composite mixing pipeline 314 to the extrusion chamber 317 of the die forming and coating equipment for each cell layer.

[0041] Step 3: First layer cell layer molding and coating equipment 300; such as... Figure 8 , Figure 9 , Figure 10 As shown: The composite mixture is extruded through the composite mixture pipe 314 and enters the extrusion chamber 317; the pressurized composite mixture is laminated onto the central composite three-dimensional current collector 200, which has passed through the positioning guide mold 318, under pressure; when the central composite three-dimensional current collector 200 with the composite mixture is laminated, it is forged and compacted by the external ultrasonic equipment 313 when it passes through the coating layer forming mold 315; thus forming the first layer of positive electrode 201.

[0042] Step 4: Second layer cell layer molding and coating equipment 301; After the central composite three-dimensional current collector core 200 of the first ring positive electrode layer 201 is coated, under the traction of the cell traction component 309, the second layer cell layer molding and coating equipment 301 completes the same process as the third step to form a coating of the first ring electrolyte layer 202.

[0043] Step 5: The third layer of the battery cell layer is molded and coated by the third layer of the battery cell layer ...

[0044] Step 6: Fourth layer cell layer mold forming and coating equipment 303; After the central composite three-dimensional current collector core 200 of the first ring negative electrode layer 203 is coated, under the traction of the cell traction component 309, it completes the same process as the third step through the fourth layer cell layer mold forming and coating equipment 303 to form a coating of the first ring current collector layer 204.

[0045] Step 7: Fifth layer cell layer mold forming and coating equipment 304; After the first layer current collector layer 204 is coated, the central composite three-dimensional current collector core 200 is pulled by the cell traction component 309 and completes the same process as the third step through the fifth layer cell layer mold forming and coating equipment 304 to form the second layer positive electrode layer 205.

[0046] Repeat step three above to complete the following steps in sequence: Figure 2 As shown: First layer positive electrode layer 201, first layer electrolyte layer 202, first layer negative electrode layer 203, first layer current collector layer 204, second layer positive electrode layer 205, second layer electrolyte layer 206, second layer negative electrode layer 207, second layer current collector layer 208, third layer positive electrode layer 209, third layer electrolyte layer 210, third layer negative electrode layer 211, nth layer current collector layer, nth layer positive electrode layer, nth layer electrolyte layer, nth layer negative electrode layer, outermost layer negative electrode tab wrapping layer 100 (n>3). Layers are wrapped and coated one by one to form a bipolar stacked series structure; then, the appropriate length is cut according to the product application requirements to complete the structure as shown. Figure 1 The manufacturing process of the linear cylindrical small battery shown.

[0047] Further: such as Figure 1 , Figure 3 As shown: The series positive electrode tab 103 is welded to the central composite three-dimensional current collector core 200 using welding technology. The positive electrode is sealed with positive electrode sealant 101, and the negative electrode is sealed with negative electrode sealant 102.

[0048] Example 2, the manufacturing process of parallel bipolar structure battery is described below.

[0049] Steps one, two, three, four, five, and six are the same as in Example 1 above.

[0050] Step 7: Fifth layer cell layer mold forming and coating equipment 304; After the central composite three-dimensional current collector core 200 of the first layer current collector layer 204 is coated, under the traction of the cell traction component 309, the fifth layer cell layer mold forming and coating equipment 304 completes the same process as the third step of Example 1, forming a second layer negative electrode layer 207 wrapped and coated.

[0051] Repeat step 3 of Example 1 above, and complete the following steps in sequence: Figure 4 , Figure 5 , Figure 6 As shown: First layer positive electrode layer 201, first layer electrolyte layer 202, first layer negative electrode layer 203, first layer current collector layer 204, second layer negative electrode layer 207, second layer electrolyte layer 206, second layer positive electrode layer 205, second layer current collector layer 208, third layer positive electrode layer 209, third layer electrolyte layer 210, third layer negative electrode layer 211, nth layer current collector layer, nth layer positive electrode layer, nth layer electrolyte layer, nth layer negative electrode layer, outermost layer negative electrode tab coating layer 100 (n>3). Layers are wrapped and coated one by one to form a bipolar stacked parallel structure, and then cut to the appropriate length according to product application requirements. The completed structure is as follows. Figure 1 The linear cylindrical small battery shown is manufactured. The internal electrode layer of the linear cylindrical small battery is formed, with a dual positive electrode structure 212 and a dual negative electrode structure 213.

[0052] Further: such as Figure 1 , Figure 5 , Figure 6 As shown: The parallel positive electrode tab 104 is welded to the central composite three-dimensional current collector core 200 and the double positive electrode structure 212 by welding technology; the parallel negative electrode parallel ring 105 is welded to the outermost negative electrode tab wrapping layer 100 and the double negative electrode structure 213 by welding technology; the positive electrode is sealed with positive electrode sealant 101 and the negative electrode is sealed with negative electrode sealant 102.

[0053] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention are covered within the scope of protection of the present invention.

Claims

1. A linear columnar pixel-level bipolar-structured solid-state battery, comprising: Linear cylindrical small battery individual, internal cell structure of linear cylindrical small battery individual, sealant at both ends of linear cylindrical small battery individual, positive electrode tab at the positive end of linear cylindrical small battery individual, and negative electrode tab wrapping layer around the entire linear cylindrical small battery individual. The linear columnar shape refers to the shape of the battery, characterized in that: the overall appearance of the battery presents a linear, slender, cylindrical or polygonal small battery shape; The pixel-level feature is characterized by: a single linear cylindrical small battery individual, which has the function of an independent battery and can be used as a battery on its own. At the same time, it has the flexible and versatile combination function at the pixel level in the assembly of battery packs or battery stacks, which can make battery packs or battery stacks arbitrarily combined to form various shapes. It can also be used as a filler battery for extra space or narrow and irregularly shaped spaces, saving space for electrical equipment. The internal cell structure of the linear cylindrical small battery is characterized by the following: the internal structure of the linear cylindrical small battery is composed of a central composite three-dimensional current collector core, and various solid-state battery materials are arranged and stacked layer by layer in a series or parallel structure according to the bipolar battery, with the core core being the center. Each layer is made up of multiple layers of dry powder positive electrode, multiple layers of dry powder electrolyte, multiple layers of dry powder negative electrode, and multiple layers of dry powder current collector. The battery is manufactured by ultrasonic forging and compaction after each layer is laminated. The sealing of both ends of the linear cylindrical small battery is characterized by: sealing of the positive end and sealing of the negative end; The linear cylindrical small battery individual positive electrode tab is characterized by: including a series positive electrode tab and a parallel positive electrode tab; the series positive electrode tab is welded to the central composite three-dimensional current collector core; the parallel positive electrode tab is welded to the central composite three-dimensional current collector core and the current collector layer between the two positive electrode layers respectively; The negative electrode tab wrapping layer of the linear cylindrical small battery is characterized by comprising a series negative electrode tab wrapping layer, a parallel negative electrode tab wrapping layer, and a negative electrode parallel ring; the series negative electrode tab wrapping layer is bonded to the outermost negative electrode material; the parallel negative electrode tab wrapping layer is bonded to the outermost negative electrode material; and the negative electrode parallel ring is welded to the outer negative electrode material and also to the current collector layer between the two negative electrode layers.

2. The series connection battery cell structure of the inline straight-overlaid arrangement and stacking wrapping covering according to claim 1, characterized in that: The internal structure of the linear cylindrical small battery is characterized by a direct-layer stacking of the following layers in sequence, centered on a central composite three-dimensional current collector core: a first-ring positive electrode layer, a first-ring electrolyte layer, a first-ring negative electrode layer, a first-ring current collector layer, a second-ring positive electrode layer, a second-ring electrolyte layer, a second-ring negative electrode layer, a second-ring current collector layer, a third-ring positive electrode layer, a third-ring electrolyte layer, a third-ring negative electrode layer, an nth-ring current collector layer, an nth-ring positive electrode layer, an nth-ring electrolyte layer, an nth-ring negative electrode layer (n>3), and an outermost negative electrode tab wrapping layer. The internal structure of the linear cylindrical small battery is characterized by a direct-layer stacking of the following layers in sequence, centered on the central composite three-dimensional current collector core, forming a bipolar stacked series internal structure.

3. The structure of the parallel stacked and laminated battery cell in series according to claim 1, wherein: The linear columnar small battery individual is internally stacked and covered in sequence with a center composite three-dimensional current collector core as the center, a first circle layer of positive electrode layer, a first circle layer of electrolyte layer, a first circle layer of negative electrode layer, a first circle layer of current collector layer, a second circle layer of negative electrode layer, a second circle layer of electrolyte layer, a second circle layer of positive electrode layer, a second circle layer of current collector layer, a third circle layer of positive electrode layer, a third circle layer of electrolyte layer, a third circle layer of negative electrode layer, an nth circle layer of current collector layer, an nth circle layer of negative electrode layer, an nth circle layer of positive electrode layer, an nth circle layer of electrolyte layer, an nth circle layer of negative electrode layer (n>3), and an outermost circle layer of negative electrode tab wrapping layer. The linear columnar small battery individual internal structure is characterized in that the center composite three-dimensional current collector core is taken as the center, and the electrode layers are sequentially stacked and covered in a line-by-line and circle-by-circle manner to form a bipolar stacked parallel internal structure.

4. A manufacturing line in which a plurality of cell layer mold forming and coating apparatuses are connected in series, characterized by comprising: a plurality of cell layer mold forming and coating apparatuses; a cell layer mold transfer apparatus; and a cell layer mold storage apparatus. The battery production line includes a battery core layer mold forming and coating device, a battery core traction assembly, and a current collector core conveying assembly at the front end of the production line.

5. The cell layer mold forming and coating apparatus according to claim 5, wherein: The battery core layer coating mold assembly includes a battery core positioning and guiding mold, an extrusion cavity, an ultrasonic isolation block, and a coating layer forming mold.

6. A linear columnar pixel-level bipolar structure solid-state battery manufacturing process for forming the solid-state battery of claims 1-3, characterized by, The battery production line includes the following steps: In the first step, the center composite three-dimensional current collector core (200) is conveyed and pulled by the current collector core conveying assembly (310) and the battery core traction assembly (309), sequentially passes through the first layer of battery core layer mold forming and coating device (300), the second layer of battery core layer mold forming and coating device (301), the third layer of battery core layer mold forming and coating device (302), the fourth layer of battery core layer mold forming and coating device (303), the fifth layer of battery core layer mold forming and coating device (304), the sixth layer of battery core layer mold forming and coating device (305), the seventh layer of battery core layer mold forming and coating device (306), the eighth layer of battery core layer mold forming and coating device (307), and the nth layer of battery core layer mold forming and coating device (308) (n>3) in the direction of the arrow, and sequentially forms a through flow line. Step 2: Through traditional dry mixing, fiberization, dispersing and granulation processes, various dry powder raw materials such as nano-sized positive electrode active material, negative electrode active material, electrolyte, conductive agent, binder, and metal current collector are prepared according to the positive electrode, negative electrode, electrolyte and current collector formulas respectively to complete the front-end composite mixing preparation. Then, through the extrusion equipment, they are transported to the extrusion cavity (317) of each cell layer mold forming and coating equipment through the composite mixing pipeline (314). Step 3: The first layer of the battery cell is molded and coated by the equipment (300). The composite mixture is extruded through the composite mixture pipe (314) and enters the extrusion chamber (317). The pressurized composite mixture is coated onto the central composite three-dimensional current collector core (200) that has passed through the positioning guide mold (318). When the central composite three-dimensional current collector core (200) coated with the composite mixture passes through the coating layer forming mold (315), the external ultrasonic equipment forges and compacts it to form the first layer of positive electrode layer (201). Repeat step 3 above to sequentially complete the first layer positive electrode layer (201), the first layer electrolyte layer (202), the first layer negative electrode layer (203), the first layer current collector layer (204), the second layer positive electrode layer (205), the second layer electrolyte layer (206), the second layer negative electrode layer (207), the second layer current collector layer (208), the third layer positive electrode layer (209), the third layer electrolyte layer (210), the third layer negative electrode layer (211), the nth layer current collector layer, the nth layer positive electrode layer, the nth layer electrolyte layer, the nth layer negative electrode layer, and the outermost layer negative electrode tab wrapping layer (100) (n>3); layer by layer, the bipolar stacked series structure is formed; then, according to the product application requirements, the appropriate length is cut to complete the production of the linear cylindrical small battery individual; Further: The series positive electrode tab (103) is welded to the central composite three-dimensional current collector core (200) by welding technology, and the positive electrode is sealed with positive electrode sealant (101) and the negative electrode is sealed with negative electrode sealant (102).

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