Unidirectional diversion composite mesh current collector, battery cell and preparation system

Abstract

The invention relates to the technical field of net-shaped current collectors, in particular to a one-way flow guide composite net-shaped current collector, a battery cell and a preparation system.The one-way flow guide composite net-shaped current collector comprises a plurality of metal flow guide wire bodies arranged at equal intervals and a plurality of fabric wire bodies arranged at equal intervals, and the metal flow guide wire bodies and the fabric wire bodies are arranged in a crossed mode to form a net-shaped structure; an included angle of 90 degrees is formed between the trend of the metal diversion line body and the trend of the fabric line body; the metal current guide wire bodies are arranged at equal intervals and vertically crossed, so that current can only flow in one direction along the metal current guide wire bodies, and current loss caused by'multidirectional current guide 'of a traditional net-shaped current collector is avoided; and in cooperation with the bridge effect of the conductive coatings on the two sides, dispersed current can be rapidly collected to the conductive electrode, and the current conduction efficiency is improved. Meanwhile, the insulation characteristic of the fabric wire body can avoid current interference between adjacent metal diversion wire bodies, the stability of one-way diversion is further ensured, the one-way diversion wire body is particularly suitable for a high-rate discharge scene, and heating of a battery cell is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of mesh current collectors, and more particularly to a unidirectional composite mesh current collector, a battery cell, and a fabrication system. Background Technology

[0002] In the current field of secondary batteries (such as lithium-ion batteries), current collectors, as the core components for current collection and conduction within the battery cell, are mainly of two types: metal foil and traditional mesh current collectors. Metal foil, primarily made of copper and aluminum foil, is widely used in new energy vehicles, energy storage devices, and portable electronic devices due to its excellent conductivity. Traditional mesh current collectors, developed to address the issue of the high weight of metal foil, often employ a mesh structure formed by weaving metal wires, attempting to strike a balance between lightweight and conductivity. In the cell manufacturing process, existing systems typically include a main manufacturing unit, a core clamping device, a cutting device, and a feeding and assembly device. Cell production is completed through steps such as clamping the core, cutting the film, and connecting the casing, meeting the industry's basic manufacturing needs.

[0003] Existing technologies face several bottlenecks, making it difficult to meet the development demands for high-energy-density and high-safety battery cells. Regarding current collectors, the high weight of metal foil restricts energy density improvement, and it is prone to wrinkling when rolled up and localized heating during high-rate discharge. Traditional mesh current collectors are mostly multi-directional current-conducting structures, resulting in current dispersion and losses of 8%-12%. Furthermore, the metal wires are mostly made of a single material, and the lack of insulation between wires easily leads to current interference, affecting cycle life. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above-mentioned unidirectional flow-guiding composite mesh current collectors, cells and manufacturing systems, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a unidirectional composite mesh current collector, a battery cell, and a fabrication system.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a unidirectional flow-guiding composite mesh current collector, comprising: a plurality of equidistant metal flow-guiding lines and a plurality of equidistant fabric lines, wherein the plurality of metal flow-guiding lines and the plurality of fabric lines are intersected to form a mesh structure; the direction of the metal flow-guiding lines and the direction of the fabric lines form a 90° angle; and the mesh structure is covered with a conductive coating on both sides.

[0008] As a preferred embodiment of the unidirectional flow-guiding composite mesh current collector of the present invention, wherein the metal flow guide body is made of copper-aluminum composite material.

[0009] This invention also discloses a battery cell employing a unidirectional composite mesh current collector, comprising: two composite mesh current collectors, each having a conductive electrode at one end to form a positive electrode film and a negative electrode film, with a separator between the positive and negative electrode films, and a separator also disposed on the outside of the negative electrode film; the positive and negative electrode films being rolled up with the two separators to form a cylindrical core; a housing assembly, including an outer shell covering the cylindrical core, a positive electrode shell disposed at one end of the outer shell, and a negative electrode shell disposed at the other end of the outer shell, wherein an electrolyte is poured into the housing assembly; and a sealing assembly disposed on the positive electrode shell.

[0010] As a preferred embodiment of the battery cell of the present invention, the positive electrode shell and the negative electrode shell are provided with external protrusions, and the external protrusions on the positive electrode shell are provided with mounting bosses. An injection hole is provided on the mounting bosses. The sealing assembly includes a sealing glue nail inserted into the injection hole and a sealing aluminum nail provided on the sealing glue nail. After installation, the sealing aluminum nail is flush with the opening of the injection hole.

[0011] In a preferred embodiment of the battery cell of the present invention, the positive electrode housing includes a positive electrode plate and a sealing ring connected to the positive electrode plate, and the negative electrode housing includes a negative electrode plate and a sealing ring connected to the negative electrode plate.

[0012] The present invention also discloses a battery cell manufacturing system, comprising: a main manufacturing body; a core clamping assembly, including a main clamping tube disposed on the main manufacturing body, rotating rings disposed at both ends of the main clamping tube, clamping components disposed on the rotating rings, and a driving component disposed on the main clamping tube; a winding assembly, including a clamping ring disposed at the rear end of one of the rotating rings, a clamping rod rotatably connected to the clamping ring, and a rotating component rotatably connected to the end of the clamping rod; and a cutting assembly, including a cutting port disposed on the main manufacturing body and a cutting blade component slidably connected to the cutting port.

[0013] In a preferred embodiment of the cell manufacturing system of the present invention, the clamping component includes a first block and a second block disposed on the side wall of the rotating ring end, a third block and a fourth block disposed on the main clamping tube, two of each of the first and second blocks, two of each of the third and fourth blocks, a first telescopic rod connecting the first block and the third block, and a second telescopic rod connecting the second block and the fourth block, the two first telescopic rods being parallel to each other, the two second telescopic rods being parallel to each other, and the extension direction of the second telescopic rod being perpendicular to the extension direction of the first telescopic rod.

[0014] A linkage rod is provided between the two rotating rings. The cutting component includes a horizontal ejection cylinder disposed in the cutting opening and a cutting blade disposed on the horizontal ejection cylinder. An adhesive arc plate is provided on the surface under the cutting blade.

[0015] As a preferred embodiment of the cell manufacturing system of the present invention, the driving component includes a worm gear rotatably connected to the lower end of the main manufacturing body and an arc-shaped rack disposed at the lower end of one of the rotating rings and cooperating with the worm gear;

[0016] A side plate is slidably connected to the main preparation body, a clamping ring is disposed on the side plate, the rear end of the clamping rod is hinged to the side plate, a first connecting block is disposed on the side plate, a second connecting block is disposed on the clamping ring, a threaded rod is rotatably connected to the first connecting block, and a threaded groove that mates with the threaded rod is provided on the second connecting block.

[0017] As a preferred embodiment of the cell manufacturing system of the present invention, the rotating component includes a rotating wheel disposed at one end of the clamping rod extending into the clamping ring, a micro motor disposed on the rotating wheel, and a plurality of rotating spindle bodies disposed on the outside of the rotating wheel. A transverse groove is provided on the rotating spindle body, and a plurality of protruding blades are slidably connected inside the rotating wheel. After the protruding blades slide, they extend out of the transverse groove, and each of the protruding blades is provided with a configuration block near one end of the transverse groove.

[0018] The main preparation body is slidably connected to a support block near the side plate. The upper end of the support block forms an arc-shaped support groove, and a buffer pad is provided in the support groove. The lower end of the side plate has an opening for the support block to slide.

[0019] As a preferred embodiment of the cell manufacturing system of the present invention, the main manufacturing body is rotatably connected to a feeding tray at a location away from the main clamping tube. The feeding tray has several mounting slots, and a semi-finished shell formed by splicing the outer shell and the negative electrode shell is installed in the mounting slots. The support block slides and approaches the feeding tray, and a positive electrode shell mounting component is provided on the main manufacturing body.

[0020] The beneficial effects of this invention are as follows: the equidistant arrangement and vertical cross-layout of the metal current-conducting wires ensure that the current can only flow unidirectionally along the direction of the metal current-conducting wires, avoiding the current loss caused by the "multi-directional current conduction" of traditional mesh current collectors; combined with the "bridging effect" of the conductive coatings on both sides, the dispersed current can be quickly gathered to the conductive electrodes, improving the current conduction efficiency. At the same time, the insulation properties of the fabric wires can avoid current interference between adjacent metal current-conducting wires, further ensuring the stability of unidirectional current conduction, especially suitable for high-rate discharge scenarios, reducing cell heating. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0022] Figure 1 This is a schematic diagram of the overall structure of the unidirectional flow-guiding composite mesh current collector of the present invention.

[0023] Figure 2 This is an enlarged schematic diagram of the unidirectional flow-guiding composite mesh current collector of the present invention.

[0024] Figure 3 This is a schematic diagram of the overall structure of the battery cell of the present invention.

[0025] Figure 4 This is a schematic diagram of the rolled film of the battery cell of the present invention.

[0026] Figure 5 This is a schematic diagram of the positive electrode casing of the battery cell of the present invention.

[0027] Figure 6 This is a schematic diagram of the overall structure of the battery cell manufacturing system of the present invention.

[0028] Figure 7 This is a schematic diagram of the clamping component of the battery cell manufacturing system of the present invention.

[0029] Figure 8 This is a schematic diagram of the overall structure of the battery cell manufacturing system of the present invention.

[0030] Figure 9 for Figure 8 Enlarged diagram of part A in the middle.

[0031] Figure 10 This is a schematic diagram of the feeding tray of the battery cell manufacturing system of the present invention.

[0032] Figure 11 This is a schematic diagram of the rotating wheel in the cell manufacturing system of the present invention.

[0033] Figure 12 This is a schematic diagram showing the protruding blade of the cell manufacturing system of the present invention in the extended state.

[0034] Explanation of reference numerals in the attached drawings: 100, Metal guide wire; 101, Fabric wire; 102, Conductive coating; 200, Positive electrode film; 201, Negative electrode film; 202, Separator; 203, Housing assembly; 2031, Outer shell; 2032, Positive electrode shell; 2033, Negative electrode shell; 2034, External protrusion; 2035, Mounting boss; 2036, Injection hole; 204, Sealing assembly; 2041, Sealant. Nail; 2042, Sealing aluminum nail; 20321, Positive electrode plate; 20322, Sealing rubber ring; 300, Main preparation body; 301, Core clamping assembly; 3011, Main clamping tube; 3012, Rotating ring; 302, Clamping component; 303, Driving component; 304, Take-up assembly; 3041, Clamping ring; 3042, Clamping rod; 3021, First block; 3022, Second block; 3023. Third block; 3024, Fourth block; 3025, First telescopic rod; 3026, Second telescopic rod; 3027, Linking rod; 305, Cutting assembly; 3051, Cutting end; 3052, Cutting blade assembly; 30521, Horizontal ejection cylinder; 30522, Cutting blade; 30523, Adhesive arc plate; 3031, Worm gear; 3032, Arc-shaped rack; 3033, Side plate; 3034, First connecting block 3035, Second connecting block; 3036, Threaded rod; 306, Rotating component; 3061, Rotating wheel; 3062, Micro motor; 3063, Rotating spindle body; 3064, Horizontal groove; 3065, Protruding blade; 3066, Configuration block; 307, Support block; 308, Support groove; 309, Opening; 400, Feeding tray; 401, Mounting groove; 402, Positive electrode housing mounting component; 403, Spring. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0038] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0039] Example 1

[0040] Reference Figures 1-2 This is the first embodiment of the present invention, which provides a unidirectional composite mesh current collector. As the core current-conducting component of the battery cell, the composite mesh current collector plays a crucial role in collecting and conducting current. In this embodiment, the composite mesh current collector includes several equally spaced metal conductors 100 and several equally spaced fabric conductors 101.

[0041] In this embodiment, a plurality of metal guide wires 100 and a plurality of fabric wires 101 are intersected to form a mesh structure, and the direction of the metal guide wires 100 and the direction of the fabric wires 101 form a 90° angle. This vertical intersecting structure ensures the overall stability of the current collector and prevents deformation. On the other hand, it can clearly define the direction of current conduction. The metal guide wires 100 serve as the main current channels, enabling unidirectional current conduction along a preset direction and avoiding localized heating caused by current dispersion.

[0042] During weaving, the fabric yarns 101 are first laid out in parallel, and then the metal guide yarns 100 are inserted horizontally. The metal guide yarns 100 first pass under the first fabric yarn 101, then pass over the second fabric yarn 101, then pass under the third fabric yarn 101, and so on, to weave the metal guide yarns 100 and the fabric yarns 101.

[0043] Preferably, the fabric thread 101 is made of high-strength insulating fiber, and in this embodiment, nylon fiber is used. Its function is to support the metal conductor 100, prevent the thread from shifting or breaking, and improve the energy density of the battery cell.

[0044] As a preferred option, the metal conductor 100 is made of copper-aluminum composite material. Copper has excellent conductivity, while aluminum can significantly reduce the weight of the conductor. The two are combined to form a copper core and aluminum sheath structure. The copper core ensures efficient current conduction and reduces interface impedance, while the aluminum sheath reduces the amount of metal used and improves the corrosion resistance of the conductor.

[0045] Furthermore, a conductive coating 102 is applied to both sides of the mesh structure. The conductive coating 102 has a uniform thickness and is tightly adhered to the wire body. Its core function is to improve the conductivity and uniformity of the current collector surface, avoid cell polarization caused by local current concentration, and prevent the metal current conductor 100 from directly contacting the electrolyte and causing a chemical reaction, thereby extending the service life of the current collector.

[0046] In this embodiment, the equidistant and vertically intersecting arrangement of the metal current-conducting wires 100 ensures that current can only flow unidirectionally along the direction of the metal current-conducting wires 100, avoiding the current loss caused by the "multi-directional current conduction" of traditional mesh current collectors. Combined with the "bridging effect" of the conductive coatings 102 on both sides, the dispersed current can be quickly gathered to the conductive electrodes, improving current conduction efficiency. Simultaneously, the insulating properties of the fabric wires 101 prevent current interference between adjacent metal current-conducting wires 100, further ensuring the stability of unidirectional current conduction, making it particularly suitable for high-rate discharge scenarios and reducing cell heating.

[0047] Example 2

[0048] Reference Figures 3-5 The second embodiment of the present invention discloses a battery cell that employs the aforementioned unidirectional composite mesh current collector. Each of the two composite mesh current collectors has a conductive electrode at one end, thereby forming a positive electrode film 200 and a negative electrode film 201. A separator 202 is disposed between the positive electrode film 200 and the negative electrode film 201, and a separator 202 is also disposed on the outside of the negative electrode film 201. The separator 202 is made of porous polyethylene material, which allows electrolyte ions to pass through while blocking electron conduction, ensuring normal charging and discharging of the battery cell. The positive electrode film 200, separator 202, negative electrode film 201, and separator 202 form a four-layer composite structure. After the positive electrode film 200, negative electrode film 201, and two separators 202 are bonded together, they are rolled up to form a cylindrical core, forming the internal main structure of the battery cell.

[0049] Rolling process: After the positive electrode film 200, negative electrode film 201 and two separators 202 are bonded together, they are rolled around the central axis to form a cylindrical core. The composite mesh current collector has good flexibility and is not easy to break during the rolling process. At the same time, its lightweight characteristics can reduce the overall weight of the core.

[0050] Furthermore, the present invention also includes a housing assembly 203, comprising an outer housing 2031 covering a cylindrical core, a positive electrode housing 2032 disposed at one end of the outer housing 2031, and a negative electrode housing 2033 disposed at the other end of the outer housing 2031, wherein an electrolyte is poured into the housing assembly 203.

[0051] The housing assembly 203 is used to cover the cylindrical core and isolate it from the external environment. It also serves as the electrode lead-out carrier of the battery cell. The outer housing 2031 is made of thin-walled aluminum and can tightly cover the cylindrical core. The surface of the outer housing 2031 is anodized to improve corrosion resistance.

[0052] Preferably, the positive electrode housing 2032 is disposed at one end of the outer shell 2031, and the negative electrode housing 2033 is disposed at the other end of the outer shell 2031. Both are sealed to the outer shell 2031. The positive electrode housing 2032 includes a positive electrode plate 20321 and a sealing ring 20322 connected to the positive electrode plate 20321. The negative electrode housing 2033 includes a negative electrode plate and a sealing ring 20322 connected to the negative electrode plate. The sealing ring 20322 is made of nitrile rubber, which has excellent resistance to electrolyte corrosion and elasticity, and can fill the gaps in the housing connection to prevent electrolyte leakage.

[0053] Furthermore, both the positive electrode housing 2032 and the negative electrode housing 2033 are provided with an outward protrusion groove 2034. In this embodiment, the center of the outward protrusion groove 2034 is circular and protrudes outward. An extension groove extends outward from the center of the outward protrusion groove 2034, and the extension groove also protrudes outward.

[0054] Preferably, a mounting boss 2035 is provided on the external protrusion 2034 located on the positive electrode housing 2032, and an injection hole 2036 is provided on the mounting boss 2035. The injection hole 2036 is used to pour electrolyte into the housing assembly 203. The electrolyte adopts a mixture of lithium salt and organic solvent, which can wet the mesh structure of the core and the diaphragm 202.

[0055] Furthermore, the present invention also includes a sealing component 204, which is disposed on the positive electrode housing 2032 and at the injection hole 2036 of the positive electrode housing 2032. The sealing component 204 is used to seal the injection hole 2036 to prevent electrolyte leakage and the entry of external impurities. In this embodiment, the sealing component 204 includes a sealing rubber nail 2041 and a sealing aluminum nail 2042. The sealing rubber nail 2041 is inserted into the injection hole 2036 and is made of electrolyte-resistant fluororubber material. Its elastic properties allow it to tightly fit the inner wall of the injection hole 2036.

[0056] The sealing aluminum nail 2042 is set on the sealing glue nail 2041. After installation, it is flush with the opening of the injection hole 2036. The sealing aluminum nail 2042 enhances the sealing effect. The aluminum material has good conductivity, which can help the positive plate 20321 to draw out the current. If the positive plate 20321 has poor contact, the sealing aluminum nail 2042 can temporarily conduct the current, improving the reliability of the cell.

[0057] Example 3

[0058] Reference Figures 6-12The second embodiment of the present invention discloses a battery cell manufacturing system. The battery cell manufacturing system is mainly used to clamp, roll, cut and assemble cylindrical cores, as well as to feed and package the shell. In this embodiment, the battery cell manufacturing system includes a main manufacturing body 300, a core clamping assembly 301, a roll taking assembly 304, and a cutting assembly 305.

[0059] Furthermore, the main preparation body 300 is an integral component of the entire preparation system and serves as the main supporting structure.

[0060] Furthermore, in this embodiment, the core clamping assembly 301 is disposed on the main preparation body 300 for clamping cylindrical cores. The core clamping assembly 301 includes a main clamping tube 3011, a rotating ring 3012, a clamping component 302, and a driving component 303. The main clamping tube 3011 is horizontally disposed on the main preparation body 300 and serves as the central axis for core winding. An installation frame extends from the main clamping tube 3011 and connects to the main preparation body 300. The two rotating rings 3012 are respectively disposed at both ends of the main clamping tube 3011 and can rotate around the axis of the main clamping tube 3011.

[0061] Furthermore, in this embodiment, the clamping component 302 includes a first block 3021 and a second block 3022 disposed on the end sidewall of the rotating ring 3012, and a third block 3023 and a fourth block 3024 disposed on the main clamping tube 3011; two of each of the first block 3021, the second block 3022, the third block 3023 and the fourth block 3024 are provided, the first block 3021 and the third block 3023 are correspondingly disposed, and the first block 3021 and the second block 3022 are rotatably connected to the rotating ring 3012, and the third block 3023 and the fourth block 3024 are rotatably connected to the main clamping tube 3011.

[0062] A first telescopic rod 3025 is connected between the first block 3021 and the third block 3023, and a second telescopic rod 3026 is connected between the second block 3022 and the fourth block 3024. The two first telescopic rods 3025 are parallel, and the two second telescopic rods 3026 are parallel. The extension direction of the second telescopic rod 3026 is perpendicular to that of the first telescopic rod 3025. The first telescopic rod 3025 is closer to the end face of the main clamping tube 3011. This cross telescopic rod structure can extend as the rotating ring 3012 rotates. As the rotating ring 3012 rotates, the third block 3023 moves away from the adjacent first block 3021, thereby moving the two first telescopic rods 3025 away from each other. At the same time, the fourth block 3024 moves away from the adjacent second block 3022, thereby moving the two second telescopic rods 3026 away from each other. As a result, the rectangular space formed between the two second telescopic rods 3026 and the two first telescopic rods 3025 gradually expands, thus adapting to the gradually curling core.

[0063] Furthermore, a connecting rod 3027 is also provided between the two rotating rings 3012, which connects the two rotating rings 3012 so that the two rotating rings 3012 can rotate synchronously.

[0064] Furthermore, a driving component 303 is provided on the main clamping tube 3011. In this embodiment, the driving component 303 includes a worm gear 3031 rotatably connected to the lower end of the main preparation body 300 and an arc-shaped rack 3032 disposed at the lower end of one of the rotating ring bodies 3012 and cooperating with the worm gear 3031. An external motor drives the worm gear 3031 to rotate, and the worm gear 3031 drives the rotating ring body 3012 to rotate through meshing with the arc-shaped rack 3032.

[0065] Furthermore, in this embodiment, the take-up assembly 304 is disposed at the rear end of the rotating ring 3012 away from the drive component 303, and is used to remove the core from the main clamping tube 3011 after the core is wound, and to supply the core center rod at the center of the core. In this embodiment, the take-up assembly 304 includes a clamping ring 3041 disposed at the rear end of one of the rotating rings 3012, a clamping rod 3042 rotatably connected to the clamping ring 3041, and a rotating member 306 rotatably connected to the end of the clamping rod 3042.

[0066] Furthermore, a side plate 3033 is slidably connected to the main preparation body 300. The side plate 3033 is vertically arranged and has a circular plate shape at its upper end. A clamping ring 3041 is disposed on the side plate 3033. The rear end of the clamping rod 3042 is hinged to the side plate 3033. A first connecting block 3034 is disposed on the side plate 3033, and a second connecting block 3035 is disposed on the clamping ring 3041. A threaded rod 3036 is rotatably connected to the first connecting block 3034. A threaded groove that mates with the threaded rod 3036 is opened on the second connecting block 3035. Rotating the threaded rod 3036 can adjust the distance between the first connecting block 3034 and the second connecting block 3035, and drive the clamping ring 3041 to rotate, which in turn drives the clamping rod 3042 to rotate, thereby causing several clamping rods 3042 to rotate toward each other, thereby clamping the core center rod.

[0067] Preferably, the clamping rod 3042 is rotatably connected to the clamping ring 3041, and the rotating part 306 is disposed at the end of the clamping rod 3042.

[0068] Furthermore, in this embodiment, the rotating component 306 includes a rotating wheel 3061, a micro motor 3062, and several rotating spindle bodies 3063. Several protruding blades 3065 are slidably connected inside the rotating wheel 3061. The micro motor 3062 drives the rotating wheel 3061 to rotate. A transverse groove 3064 is provided on the rotating spindle body 3063. A configuration block 3066 is provided at one end of each protruding blade 3065 near the transverse groove 3064. The rotating spindle body 3063 rotates synchronously with the rotating wheel 3061. Thus, after the several clamping rods 3042 clamp the core center rod, they will drive the core center rod to rotate, thereby driving the core center rod to rotate and thus performing the core winding action. After winding is completed, the core center rod is cut off by the protruding blades 3065, thereby completing the winding operation of a single cell. A spring 403 is provided between the protruding blades 3065 and the rotating wheel 3061. The spring 403 can pull back the protruding blades 3065.

[0069] Furthermore, in this embodiment, the cutting component 305 is disposed on the main preparation body 300. The cutting component 305 is used to cut the film material after the core is rolled. In this embodiment, the cutting component 305 includes a cutting opening 3051 and a cutting blade component 3052 disposed on the main preparation body 300. The cutting blade component 3052 includes a horizontal ejection cylinder 30521 disposed in the cutting opening 3051 and a cutting blade 30522 disposed on the horizontal ejection cylinder 30521. An adhesive arc plate 30523 is disposed on the lower surface of the cutting blade 30522. The horizontal ejection cylinder 30521 drives the cutting blade 30522 to slide along the cutting opening 3051 to quickly cut the film material. The adhesive arc plate 30523 on the lower surface of the cutting blade 30522 can adhere to the cut end of the film material to prevent the film material from loosening.

[0070] Furthermore, a support block 307 is slidably connected to the main preparation body 300 near the side plate 3033. An arc-shaped support groove 308 is formed at the upper end of the support block 307. A buffer pad is provided in the support groove 308. An opening 309 is provided at the lower end of the side plate 3033 for the support block 307 to slide. A push plate is slidably connected in the support block 307. An electric cylinder is provided on the support block 307 to push the push plate to move.

[0071] Furthermore, a feeding tray 400 is rotatably connected to the main preparation body 300 away from the main clamping tube 3011. Several mounting slots 401, each semi-cylindrical in shape, are formed on the feeding tray 400. The semi-finished outer shell 2031 and the negative electrode shell 2033 are placed within these slots. The feeding tray 400 is driven by a motor to rotate intermittently. Each rotation transports one semi-finished outer shell to a position directly opposite the support block 307. After sliding, the support block 307 feeds the core into the semi-finished outer shell, achieving precise docking between the core and the shell.

[0072] Furthermore, a positive electrode housing mounting component 402 is provided on the main preparation body 300 for mounting the positive electrode housing 2032 to the other end of the outer shell 2031. The positive electrode housing mounting component 402 includes a robotic arm, which grasps the positive electrode housing 2032, aligns it with the outer shell 2031, and presses it in place.

[0073] Preferably, a slide rail is provided on the main preparation body 300, and the side plate 3033 and the support block 307 are slidably connected to the slide rail.

[0074] Metal conductor wire 100 and fabric wire 101 are woven perpendicularly into a mesh structure. Conductive coating 102 is sprayed on both sides and dried to prepare a composite mesh current collector. Then, conductive electrodes are welded to one end of the current collector to form a positive electrode film 200 and a negative electrode film 201. Then, the positive electrode film 200, separator 202, negative electrode film 201 and separator 202 are bonded together in sequence to complete the preparation of the core.

[0075] First, the core is placed into the cutting opening 3051, and the core center rod is installed. The core center rod is clamped by the clamping rod 3042. Then, the core and the core center rod are bonded together. Then, the micro motor 3062 drives the rotating wheel 3061 to rotate, and the rotating spindle body 3063 rotates synchronously with the rotating wheel 3061. Thus, after the clamping rods 3042 clamp the core center rod, they will drive the core center rod to rotate, thereby causing the core to curl. After curling, the core is cut by the cutting blade 30522. Then, the side plate 3033 drives the core to move towards the main clamping tube 3011 and moves the core into the main clamping tube 3011. Then, the core is clamped by the two first telescopic rods 3025 and the second telescopic rod 3026. The driving component 303 drives the rotating ring body 3012 to rotate. As the rotating ring body 3012 rotates, the third block... 3023 moves closer to the adjacent first block 3021, causing the two first telescopic rods 3025 to move closer together. At the same time, the distance between the fourth block 3024 and the adjacent second block 3022 shortens, causing the two second telescopic rods 3026 to move closer together. This gradually reduces the rectangular space formed by the two second telescopic rods 3026 and the two first telescopic rods 3025, thus tightening the core and making the core more compact. After the core is finished, the side plate 3033 and the support block 307 are pulled back and moved away from the main clamping tube 3011. Then, the micro motor 3062 is started, causing the rotating wheel 3061 to rotate at high speed. Centrifugal force is used to throw the protruding blade 3065 outward. The protruding blade 3065 extends from the spindle body and cuts off the core center rod after being thrown out. The core center rod is cut off by the protruding blade 3065, thus completing the core winding operation.

[0076] Then the core falls onto the support block 307, and the support block 307 moves to the feeding tray 400. The electric cylinder pushes the push plate, and the push plate pushes the core into the corresponding semi-finished outer shell. Then the feeding tray 400 continues to rotate, and the robotic arm is used to install the positive electrode shell 2032 onto the outer shell 2031.

[0077] Electrolyte is poured into the housing assembly 203 through the injection hole 2036 of the mounting boss 2035 of the positive electrode housing 2032. After the electrolyte wets the core, the sealing nail 2041 is inserted, and then the sealing aluminum nail 2042 is pressed in to ensure that the injection hole 2036 is completely sealed. Finally, the sealing performance and conductivity of the battery cell are tested, and qualified products proceed to the next process.

[0078] This manufacturing system can produce both coils and battery cells, and its streamlined structural design improves manufacturing efficiency and shortens manufacturing time.

[0079] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. Any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended protection.

[0080] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0081] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0082] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A one-way flow composite mesh current collector, characterized by: It comprises: A plurality of equidistantly arranged metal flow lines (100) and a plurality of equidistantly arranged fabric lines (101), the metal flow lines (100) and the fabric lines (101) are arranged in a cross manner to form a mesh structure; The metal flow lines (100) and the fabric lines (101) form a 90° angle; Both sides of the mesh structure are covered with a conductive coating (102).

2. The unidirectional flow composite mesh current collector of claim 1, wherein: The metal flow lines (100) are made of copper-aluminum composite material.

3. An electrochemical cell employing the unidirectional flow composite mesh current collector of any one of claims 1 or 2, characterized by: It comprises: Both ends of the composite mesh current collector are provided with conductive poles to form a positive electrode film (200) and a negative electrode film (201), a diaphragm (202) is arranged between the positive electrode film (200) and the negative electrode film (201), and a diaphragm (202) is also arranged outside the negative electrode film (201), and the positive electrode film (200) and the negative electrode film (201) are rolled after being attached to the two diaphragms (202) to form a cylindrical roll core; The shell assembly (203) comprises an outer shell (2031) covering the cylindrical roll core, a positive electrode shell (2032) arranged at one end of the outer shell (2031), and a negative electrode shell (2033) arranged at the other end of the outer shell (2031), and electrolyte is poured into the shell assembly (203); The sealing assembly (204) is arranged on the positive electrode shell (2032).

4. The cell of claim 3, wherein: The positive electrode shell (2032) and the negative electrode shell (2033) are provided with an outer protruding groove body (2034), an installation boss (2035) is arranged on the outer protruding groove body (2034) of the positive electrode shell (2032), an injection hole (2036) is formed in the installation boss (2035), the sealing assembly (204) comprises a sealing rubber nail (2041) inserted into the injection hole (2036) and a sealing aluminum nail (2042) arranged on the sealing rubber nail (2041), and the sealing aluminum nail (2042) is flush with the hole opening of the injection hole (2036) after installation.

5. The cell of claim 4, wherein: The positive electrode shell (2032) comprises a positive electrode plate (20321) and a sealing rubber ring (20322) connected to the positive electrode plate (20321), and the negative electrode shell (2033) comprises a negative electrode plate and a sealing rubber ring (20322) connected to the negative electrode plate.

6. A cell preparation system for preparing a cell as claimed in any one of claims 3 to 5, characterised in that: It comprises: A main preparation body (300); A roll core clamping assembly (301) comprising a main clamping pipe (3011) arranged on the main preparation body (300), a rotating ring body (3012) arranged at both ends of the main clamping pipe (3011), a clamping component (302) arranged on the rotating ring body (3012), and a driving component (303) arranged on the main clamping pipe (3011); A roll taking assembly (304) comprising a clamping ring (3041) arranged at the rear end of one of the rotating ring bodies (3012), a clamping rod (3042) rotatably connected to the clamping ring (3041), and a rotating member (306) rotatably connected to the end of the clamping rod (3042); The cutting assembly (305) comprises a cutting port (3051) arranged on the main preparation body (300) and a cutting component (3052) slidably connected to the cutting port (3051).

7. The cell preparation system of claim 6, wherein: The clamping component (302) comprises first blocks (3021) and second blocks (3022) arranged on the end side wall of the rotating ring body (3012), third blocks (3023) and fourth blocks (3024) arranged on the main clamping pipe (3011), the first blocks (3021) and the second blocks (3022) are both provided with two, the third blocks (3023) and the fourth blocks (3024) are both provided with two, the first blocks (3021) and the third blocks (3023) are connected by first telescopic rods (3025), the second blocks (3022) and the fourth blocks (3024) are connected by second telescopic rods (3026), the two first telescopic rods (3025) are parallel to each other, the two second telescopic rods (3026) are also parallel to each other, and the extension direction of the second telescopic rods (3026) is perpendicular to the extension direction of the first telescopic rods (3025); The two rotating ring bodies (3012) are provided with a linkage rod (3027), the cutting component (3052) comprises a horizontal push-out air cylinder (30521) arranged in the cutting port (3051) and a cutting knife (30522) arranged on the horizontal push-out air cylinder (30521), and the surface below the cutting knife (30522) is provided with a sticky arc plate (30523).

8. The cell preparation system of claim 7, wherein: The driving component (303) comprises a worm (3031) rotatably connected to the lower end of the main preparation body (300) and an arc-shaped rack (3032) arranged at the lower end of one of the rotating ring bodies (3012) and matched with the worm (3031); The main preparation body (300) is slidably connected with a side plate (3033), the clamping ring (3041) is arranged on the side plate (3033), the rear end of the clamping rod (3042) is hinged to the side plate (3033), the side plate (3033) is provided with a first connecting block (3034), the clamping ring (3041) is provided with a second connecting block (3035), the first connecting block (3034) is rotatably connected with a threaded rod (3036), and the second connecting block (3035) is provided with a threaded groove matched with the threaded rod (3036).

9. The cell preparation system of claim 8, wherein: The rotating part (306) comprises a rotating wheel (3061) arranged at one end of the clamping rod (3042) extending into the clamping ring (3041), a micro motor (3062) arranged on the rotating wheel (3061), and a plurality of rotating spindles (3063) arranged outside the rotating wheel (3061), wherein the rotating spindles (3063) are provided with transverse grooves (3064), the rotating wheel (3061) is slidably connected with a plurality of protruding blades (3065), the protruding blades (3065) extend out of the transverse grooves (3064) after sliding, each of the protruding blades (3065) is provided with a configuration block (3066) near one end of the transverse groove (3064), and a spring (403) is arranged between the protruding blade (3065) and the inside of the rotating wheel (3061). The main preparation body (300) is slidably connected with a supporting block (307) near the side plate (3033), the supporting block (307) is formed with a supporting groove (308) with a circular arc at the upper end, a buffer pad is arranged in the supporting groove (308), and the side plate (3033) is provided with an opening (309) for sliding of the supporting block (307) at the lower end.

10. The cell preparation system of claim 9, wherein: The main preparation body (300) is rotatably connected with a feeding disc (400) away from the main clamping pipe (3011), the feeding disc (400) is provided with a plurality of installation grooves (401), and the installation grooves (401) are installed with an outer shell half product formed by splicing of the outer shell (2031) and the negative electrode shell (2033). The supporting block (307) is close to the feeding disc (400) after sliding, and the main preparation body (300) is provided with a positive electrode shell mounting piece (402).

Images