Solid-state battery lamination machine with tail roll structure

Abstract

The utility model relates to a solid-state battery lamination machine with a tail roll structure, which comprises a lamination table, a blanking device, a tail roll device and a rubberizing device, the lamination table is used for sequentially laminating a composite positive pole piece and a composite negative pole piece on a film of the lamination table through a pole piece feeding device to form a pole piece assembly; no thin film is stacked between the composite positive plates and the composite negative plates which are alternately stacked in the pole piece assembly; the discharging device reciprocates among the lamination table, the tail winding device and the rubberizing device, the discharging device clamps a pole piece assembly and a thin film and moves to the tail winding device together, a winding needle of the tail winding device clamps the pole piece assembly and the thin film, and the thin film is wound on the outer side of the pole piece assembly by driving the pole piece assembly to rotate to form a naked battery cell; the bare battery cell is moved to the rubberizing station through the blanking device, and the rubberizing device is used for pasting a fixed adhesive tape on the tail part of a thin film on the outermost layer of the bare battery cell. According to the utility model, the thin film is wound on the outer side of the pole piece assembly through the tail winding device and is fixed through the fixing adhesive tape.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to a solid-state battery stacking machine with a tail roll structure. Background Technology

[0002] With the continuous development of battery technology, solid-state batteries have advantages such as high energy density and high safety. The industry is generally optimistic about solid-state batteries as the next generation of energy storage batteries, and solid-state batteries are close to the mass production stage. Traditional stacking machines are used to produce cells for liquid lithium batteries. They use a method of stacking negative electrode sheets, separators, and positive electrode sheets in sequence and then attaching adhesive to make bare cells. However, solid-state batteries use solid electrolytes, which contain substances that act as an electronic separator. This is different from traditional liquid lithium batteries, making existing stacking machines unsuitable for the production of solid-state batteries.

[0003] Therefore, it is necessary to design a stacking machine suitable for solid-state batteries that can produce solid-state batteries quickly and stably. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a solid-state battery stacking machine with a tail roll structure.

[0005] This utility model provides a solid-state battery stacking machine with a tail-winding structure, including a stacking table, a feeding device, a tail-winding device, and an adhesive application device. The stacking table uses an electrode feeding device to sequentially stack composite positive and composite negative electrodes on the film of the stacking table to form an electrode assembly. The composite positive and composite negative electrodes stacked alternately in the electrode assembly do not have films between them. The feeding device reciprocates between the stacking table, the tail-winding device, and the adhesive application device. The feeding device clamps the electrode assembly and the film together and moves them to the tail-winding device. The winding needles of the tail-winding device clamp the electrode assembly and the film, and drive the electrode assembly to rotate to wind the film around the outside of the electrode assembly to form a bare cell. The bare cell is moved to the adhesive application station by the feeding device, and the adhesive application device applies fixing tape to the tail of the outermost film of the bare cell.

[0006] In some embodiments, the composite positive electrode sheet includes a positive electrode substrate coated with a positive electrode active material slurry and a solid electrolyte slurry.

[0007] In some embodiments, the composite negative electrode sheet includes a negative electrode substrate coated with a negative electrode active material slurry and a solid electrolyte slurry.

[0008] In some embodiments, the feeding device includes a thin film traction assembly and a cell transport assembly, which are mounted on the same linear drive module. The thin film traction assembly includes a first movable seat, a mounting frame, a thin film clamp, and a thin film cutter. The first movable seat is driven by the linear drive module. The mounting frame is fixed below the first movable seat and has a feed port for the electrode assembly and the thin film to pass through. The mounting frame has a thin film cutter and a thin film clamp on both sides of the feed port. The cell transport assembly includes a second movable seat, a first rotating seat, and a cell clamp. The second movable seat is driven by the linear drive module. The first rotating seat is movably mounted below the second movable seat via a first rotary motor. The cell clamp is mounted on one side of the first rotating seat and has a clamping arm that can pass through the feed port to clamp the electrode assembly and the thin film located at the stacking table.

[0009] In some embodiments, the tail winding device includes a winding needle, a needle-pulling moving seat, and a tail winding lifting seat. The winding needle is divided into a first winding needle and a second winding needle. The first winding needle and the second winding needle are respectively mounted on two corresponding needle-pulling moving seats via two second rotating seats. Each of the two needle-pulling moving seats is equipped with a tail winding motor, which is drivenly connected to the corresponding second rotating seat. Each of the two second rotating seats is equipped with an opening and closing cylinder that is drivenly connected to the first winding needle and the second winding needle, respectively. The tail winding lifting seat is equipped with a needle-pulling motor, which drives the needle-pulling moving seat to move along the needle-pulling guide rail on the tail winding lifting seat via a lead screw pair.

[0010] In some embodiments, a mounting base is provided below the tail coil lifting seat, and a lifting motor and a lifting guide rail are provided on the mounting base. The lifting motor is connected to the tail coil lifting seat through a lifting screw pair, and the lifting motor drives the tail coil lifting seat to move along the lifting guide rail.

[0011] In some embodiments, a hot pressing device is provided between the tail winding device and the adhesive application device. The hot pressing device includes two hot pressing plates arranged vertically. The unloading device moves the bare battery cell to the hot pressing device and performs hot pressing on the bare battery cell through the two hot pressing plates.

[0012] In some embodiments, the adhesive applicator includes a glue tray, an adhesive separation component, an adhesive cutting component, and an adhesive applicator arranged sequentially along the tape path of a fixed adhesive tape. The glue tray holds a roll of adhesive material. The adhesive separation component includes an adhesive separation cylinder and an adhesive separation roller, which is positioned between two fixed rollers. The adhesive separation cylinder drives the adhesive separation roller to push the fixed adhesive tape between the two fixed rollers, thereby pulling the fixed adhesive tape from the roll of adhesive material. The adhesive cutting component includes a clamping robot and a cutter. The clamping robot grips and pulls the fixed adhesive tape, and the cutter is driven by a cutting cylinder. The adhesive applicator includes an adhesive applicator drive module and an adhesive applicator suction cup. The adhesive applicator drive module drives the adhesive applicator suction cup to reciprocate between the cutting component and the unloading device. The cutting cylinder drives the cutter to cut the fixed adhesive tape adsorbed by the adhesive applicator suction cup, and the adhesive applicator suction cup applies the adsorbed fixed adhesive tape to the outermost thin film tail of the bare battery cell.

[0013] In some embodiments, the fixing tape is a high-temperature tape.

[0014] In some embodiments, an unwinding device is provided on one side of the stacking table, which feeds the film strip to the stacking table in a non-oscillating manner.

[0015] Compared with the prior art, the beneficial effects of this utility model are: based on the structure of solid-state batteries, the stacking method of thin film, composite positive electrode sheet and composite negative electrode sheet is optimized. The thin film is wound around the outside of the electrode assembly by the tail winding device. During the tail winding process of the thin film, the stacking table can simultaneously stack the next cell, thereby improving the production efficiency of solid-state batteries. The end of the thin film is fixed by the fixing tape to prevent the thin film from loosening and better protect the bare cell. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the planar structure of a solid-state battery stacking machine with a tail roll structure according to an embodiment of this application.

[0017] Figure 2 This is a three-dimensional structural diagram of the feeding device according to an embodiment of this application.

[0018] Figure 3 This is a three-dimensional structural schematic diagram of the tail roll device according to an embodiment of this application.

[0019] Figure 4 This is a schematic planar structure diagram of the adhesive applicator according to an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the side structure of the bare battery cell before and after adhesive application, according to an embodiment of this application.

[0021] Figure label:

[0022] 101. Composite positive electrode sheet; 102. Composite negative electrode sheet; 103. Electrode assembly; 104. Bare cell; 105. Thin film; 106. Fixing tape; 107. Rubber roll;

[0023] 1. Stacking stage; 11. Pressing tool; 12. Electrode alignment stage; 13. Industrial camera;

[0024] 2. Feeding device; 21. Linear drive module;

[0025] 3. Film traction assembly; 31. First movable seat; 32. Mounting frame; 33. Film clamp; 34. Film cutter; 35. Feed port;

[0026] 4. Battery cell handling assembly; 41. Second movable seat; 42. First rotating seat; 43. Battery cell clamp; 44. First rotary motor; 45. Clamping arm;

[0027] 5. Tail winding device; 51. First winding needle; 52. Second winding needle; 53. Opening and closing cylinder; 54. Second rotating seat; 55. Needle extraction moving seat; 551. Tail winding motor; 56. Tail winding lifting seat; 57. Needle extraction motor; 58. Needle extraction guide rail; 59. Mounting seat; 591. Lifting motor; 592. Lifting guide rail;

[0028] 6. Adhesive applicator; 60. Fixed roller; 61. Adhesive tray; 62. Adhesive de-adhesion cylinder; 63. Adhesive de-adhesion roller; 64. Adhesive clamping robot; 65. Cutter; 66. Adhesive cutting cylinder; 67. Lifting module; 68. Translation module; 69. Adhesive applicator suction cup;

[0029] 7. Hot press plate;

[0030] 8. Unwinding device. Detailed Implementation

[0031] The specific embodiments of this utility model are described with reference to the accompanying drawings.

[0032] refer to Figure 1 The figure shows a schematic diagram of the planar structure of a solid-state battery stacking machine with a tail-wound structure. The key part of the figure is the stacking table 1. The lower left of the stacking table 1 is the unwinding device 8 for the thin film 105. The thin film 105 is unwound onto the stacking table 1 as the bottom film 105. The stacking table 1 is equipped with a pressure knife 11, which presses the thin film 105. On both sides of the stacking table 1 are electrode alignment tables 12. The composite positive electrode 101 and composite negative electrode 102 are transported to the stacking table 1 and stacked after passing through the corresponding electrode alignment tables 12 and then by the electrode feeding device. Multiple industrial cameras 13 are set above the stacking table 1 and the electrode alignment tables 12. The position of the electrode is monitored by the machine vision of the industrial cameras 13 to ensure the accuracy of the electrode position and prevent skew.

[0033] refer to Figures 1 to 5 A solid-state battery stacking machine with a tail-winding structure includes a stacking table 1, a feeding device 2, a tail-winding device 5, and an adhesive application device 6. The stacking table 1 uses an electrode feeding device (not shown in the attached drawings) to sequentially stack composite positive electrode sheets 101 and composite negative electrode sheets 102 onto a thin film 105 to form an electrode assembly 103. No thin film 105 is inserted between the alternately stacked composite positive electrode sheets 101 and composite negative electrode sheets 102 within the electrode assembly 103. The feeding device 2 connects the stacking table 1, the tail-winding device 5, and the adhesive application device 6. The adhesive device 6 moves back and forth between the two. The unloading device 2 clamps the electrode assembly 103 and the film 105 together and moves them to the tail winding device 5. The winding needle of the tail winding device 5 clamps the electrode assembly 103 and the film 105, and drives the electrode assembly 103 to rotate so that the film 105 is wound around the outside of the electrode assembly 103 to form a bare cell 104. The bare cell 104 moves to the adhesive application station through the unloading device 2. The adhesive application device 6 applies a fixing tape 106 to the tail of the outermost film 105 of the bare cell 104.

[0034] The solid-state battery stacking machine with a tail-winding structure of this application optimizes the stacking method of the thin film 105, composite positive electrode 101, and composite negative electrode 102 according to the structure of the solid-state battery. The tail-winding device 5 winds the thin film 105 around the outside of the electrode assembly 103. During the tail-winding process of the thin film 105, the stacking table 1 can simultaneously stack the next cell, thereby improving the production efficiency of the solid-state battery. The end of the thin film 105 is fixed by the fixing tape 106 to prevent the thin film 105 from loosening and to better protect the bare cell 104.

[0035] In order to produce a solid-state battery, in this embodiment, the composite positive electrode 101 includes a positive electrode substrate, on which a positive electrode active material slurry and a solid electrolyte slurry are coated.

[0036] Furthermore, in this embodiment, the composite negative electrode 102 includes a negative electrode substrate, on which a negative electrode active material slurry and a solid electrolyte slurry are coated.

[0037] Understandably, with this configuration, the positive electrode substrate of the composite positive electrode 101 is aluminum foil, the positive electrode active material slurry is lithium cobalt oxide (LiCoO2) or ternary lithium material (LiNiCoMnO2), and the solid electrolyte slurry is an oxide, polymer, or sulfide. The positive electrode substrate is first coated with the positive electrode active material slurry, and then coated with the solid electrolyte slurry to form the composite positive electrode 101 for solid-state batteries. The negative electrode substrate is copper foil, the negative electrode active material slurry is graphite, and the negative electrode substrate is first coated with the negative electrode active material slurry, and then coated with the solid electrolyte slurry to form the composite negative electrode 102 for solid-state batteries.

[0038] It should be further explained that the pressure knife 11 on the stacking table 1 is mainly used to press down the bottom film 105. The composite positive electrode 101 and composite negative electrode 102 are stacked sequentially on the film 105. Because the composite positive electrode 101 and composite negative electrode 102 do not need to be interposed with the film 105, the composite positive electrode 101 and composite negative electrode 102 will not shift when stacked on the stacking table 1. Therefore, the pressure knife 11 does not need to press the composite positive electrode 101 and composite negative electrode 102 tightly, which can further improve the stacking efficiency. During the stacking process, the stacking table 1 will descend accordingly as the composite positive electrode 101 and composite negative electrode 102 are gradually stacked. After the stacking is completed, the stacking table 1 will lift the electrode assembly 103 to the unloading height (e.g., Figure 1 As shown), this allows the cell clamp 43 of the feeding device 2 to clamp the electrode assembly 103 and the thin film 105.

[0039] In order to transport the electrode assembly 103 and the bare cell 104, in this embodiment, reference is made to... Figure 1 and Figure 2 The feeding device 2 includes a film traction assembly 3 and a cell transport assembly 4. The film traction assembly 3 and the cell transport assembly 4 are mounted on the same linear drive module 21. The film traction assembly 3 includes a first moving seat 31, a mounting frame 32, a film clamp 33, and a film cutter 34. The first moving seat 31 is connected to the linear drive module 21. The mounting frame 32 is fixed below the first moving seat 31. The mounting frame 32 is provided with a feed port 35 for the electrode assembly 103 and the film 105 to pass through. A film cutter 34 and a film clamp 33 are respectively provided on both sides of the opening 35; the cell transport assembly 4 includes a second moving seat 41, a first rotating seat 42 and a cell clamp 43. The second moving seat 41 is connected to the linear drive module 21. The first rotating seat 42 is movably disposed below the second moving seat 41 through the first rotating motor 44. The cell clamp 43 is installed on one side of the first rotating seat 42. The cell clamp 43 has a clamping arm 45 that can pass through the material opening 35 to clamp the electrode assembly 103 and the film 105 located at the stacking table 1.

[0040] It should be further explained that the film clamp 33 and the film cutter 34 are driven by corresponding linear cylinders. The film clamp 33 is located on the side close to the cell transport assembly 4, and the film cutter 34 is located on the side close to the stacking table 1. The film cutter 34 cuts the film 105 by thermal cutting.

[0041] Understandably, this configuration allows the linear drive module 21 to have a longer stroke, facilitating the cell transport assembly 4 to transport the electrode assembly 103 to the tail winding device 5 and the finished bare cell 104 to the hot pressing device and adhesive application device 6. The cell transport assembly 4 uses a long clamping arm 45 to hold the electrode assembly 103 and the film 105 at the stacking table 1. When the cell clamp 43 transports the electrode assembly 103 to the tail winding device 5, it pulls the film 105 along with it. When the film 105 is pulled to a sufficient length, the film clamp of the film traction assembly 3... The film clamp 33 clamps the film 105, and the pressure knife 11 of the stacking table 1 presses down on the film 105. The film cutter 34 cuts the film 105. When the winding needle of the tail winding device 5 drives the electrode assembly 103 to rotate, the film clamp 33 moves with the film 105 to the tail winding device 5, so that the film 105 maintains a certain tension during the tail winding process, ensuring the quality of the tail winding. After the film 105 is cut, the film traction component 3 moves to the periphery of the stacking table 1, so as not to hinder the operation of the electrode feeding device, so that the stacking table 1 can continue to stack the next cell. The cell handling component 4 can drive the cell clamp 43 to rotate at multiple angles through the first rotary motor 44 and the first rotating seat 42, which facilitates the transfer of bare cells 104 between the tail winding device 5, the hot pressing device and the adhesive bonding device 6.

[0042] To complete the tail roll operation, in this embodiment, reference is made to... Figure 1 and Figure 3 The tail winding device 5 includes a winding needle, a needle pulling moving seat 55, and a tail winding lifting seat 56. The winding needle is divided into a first winding needle 51 and a second winding needle 52. The first winding needle 51 and the second winding needle 52 are respectively mounted on two corresponding needle pulling moving seats 55 via two second rotating seats 54. Each of the two needle pulling moving seats 55 is equipped with a tail winding motor 551, which is connected to the corresponding second rotating seat 54. Each of the two second rotating seats 54 is equipped with an opening and closing cylinder 53, which is connected to the first winding needle 51 and the second winding needle 52 respectively. The tail winding lifting seat 56 is equipped with a needle pulling motor 57, which drives the needle pulling moving seat 55 to move along the needle pulling guide rail 58 on the tail winding lifting seat 56 via a lead screw pair.

[0043] Understandably, with this setup, the tail winding device 5 needs to drive the electrode assembly 103 to rotate. The first winding needle 51 and the second winding needle 52 clamp the electrode assembly 103 and the film 105. The electrode assembly 103 is supported by the first winding needle 51 and the second winding needle 52 on both sides to ensure stable rotation. Before clamping the electrode assembly 103, the needle pulling motor 57 drives the first winding needle 51 and the second winding needle 52 to move towards the electrode assembly 103 of the cell clamp 43. After the first winding needle 51 and the second winding needle 52 move into place, the opening and closing cylinder 53 drives the first winding needle 51 and the second winding needle 52 to clamp the electrode. The electrode assembly 103 and the thin film 105 are separated. The cell clamp 43 releases the electrode assembly 103 and moves backward to avoid it. The tail winding motor 551 drives the first winding needle 51 and the second winding needle 52 to rotate the electrode assembly 103. During the rotation, the electrode assembly 103 pulls the thin film 105, causing the thin film 105 to be wound around the outside of the electrode assembly 103. After the tail winding is formed into a bare cell 104, the cell clamp 43 moves and clamps the bare cell 104. The opening and closing cylinder 53 opens the first winding needle 51 and the second winding needle 52. The needle pulling motor 57 drives the first winding needle 51 and the second winding needle 52 to move outward together, causing the winding needles to separate from the bare cell 104.

[0044] To further improve the quality of the tail roll, in this embodiment, reference is made to... Figure 3 Below the tail coil lifting seat 56 is a mounting base 59, on which a lifting motor 591 and a lifting guide rail 592 are mounted. The lifting motor 591 is connected to the tail coil lifting seat 56 via a lifting screw pair, and the lifting motor 591 drives the tail coil lifting seat 56 to move along the lifting guide rail 592.

[0045] Understandably, with this setup, during the tail winding process, the film clamp 33 will move along with the film 105 to the tail winding device 5. The height of the electrode assembly 103 is adjusted by the lifting motor 591, so that the position of the film 105 wrapped around the electrode assembly 103 remains unchanged at a constant height. This reduces the probability of the film 105 shaking and avoids wrinkles on the film 105, thereby improving the quality of the tail winding.

[0046] To ensure a tight fit between the composite positive electrode 101, the composite negative electrode 102, and the thin film 105, in this embodiment, reference is made to... Figure 5 A hot pressing device is provided between the tail winding device 5 and the adhesive application device 6. The hot pressing device includes two hot pressing plates 7 arranged vertically. The unloading device 2 moves the bare battery cell 104 to the hot pressing device and performs hot pressing operation on the bare battery cell 104 through the two hot pressing plates 7.

[0047] Understandably, with this setup, the two hot press plates 7 heat and squeeze the bare cell 104, allowing the composite positive electrode 101, composite negative electrode 102, and thin film 105 to adhere more tightly. The thin film 105 can protect the bare cell 104 from damage by external forces or foreign objects, and also ensure that the bare cell 104 does not stick to the hot press plate 7 during the hot pressing operation.

[0048] To prevent the film 105 from loosening, in this embodiment, reference is made to... Figures 4 to 5 The adhesive applicator 6 includes a glue tray 61, an adhesive release assembly, an adhesive cutting assembly, and an adhesive applicator arranged sequentially along the conveyor path of the fixed adhesive tape 106. The glue tray 61 holds a roll of adhesive material 107. The adhesive release assembly includes an adhesive release cylinder 62 and an adhesive release roller 63, which is positioned between two fixed rollers 60. The adhesive release cylinder 62 drives the adhesive release roller 63 to push the fixed adhesive tape 106 between the two fixed rollers 60, thereby pulling the fixed adhesive tape 106 off the roll of adhesive material 107. The adhesive cutting assembly includes a glue clamping robot. 64. Cutter 65, adhesive clamping robot 64 clamps and pulls the fixed adhesive tape 106, cutter 65 is driven by cutting cylinder 66, adhesive application assembly includes adhesive application drive module and adhesive application suction cup 69, adhesive application drive module drives adhesive application suction cup 69 to move back and forth between cutting assembly and unloading device 2, adhesive cutting cylinder 66 drives cutter 65 to cut fixed adhesive tape 106 attracted by adhesive application suction cup 69, adhesive application suction cup 69 attaches fixed adhesive tape 106 attracted by adhesive to the tail of outermost film 105 of bare battery cell 104.

[0049] Understandably, with this setup, the fixed tape 106 is pulled out from the adhesive roll 107 by the adhesive release component, and the fixed tape 106 of a specified length is pulled out by the adhesive clamping robot 64 of the adhesive cutting component. The fixed tape 106 held by the adhesive suction cup 69 is then cut by the cutter 65, which can quickly complete the adhesive preparation. The adhesive clamping robot 64 is a finger cylinder, which is mounted on the adhesive preparation guide rail and is connected to the adhesive preparation cylinder (not shown in the attached figure) for transmission. The adhesive application drive module includes a lifting module 67 and a translation module 68. The lifting module 67 is driven by a motor. The translation module 68 is driven by a cylinder and is located on the upper end of the adhesive applicator. The lifting module 67 is connected to the translation module 68 via a transmission. The adhesive applicator suction cup 69 is installed on the drive end below the lifting module 67. The translation module 68 drives the lifting module 67 to move horizontally, and the lifting module 67 drives the adhesive applicator suction cup 69 to move vertically, thereby allowing the adhesive applicator suction cup 69 to move arbitrarily on the vertical plane. The adhesive applicator suction cup 69 uses the adhesive applicator drive module to attach the fixing tape 106 to the surface of the bare battery cell 104 and attach and fix the tail of the film 105, thereby preventing the film 105 from loosening.

[0050] In order to ensure that the fixing tape 106 can be stably adhered to the bare battery cell 104, in this embodiment, the fixing tape 106 is a high-temperature tape.

[0051] Understandably, this design ensures that the high-temperature tape has a certain degree of heat resistance, preventing it from falling off when the solid-state battery generates heat during operation, thus preventing the film 105 from becoming loose or deformed and further improving the quality of the solid-state battery.

[0052] In order to transport the film 105 onto the stacking stage 1, in this embodiment, reference is made to... Figure 1 A unwinding device 8 is provided on one side of the stacking table 1. The unwinding device 8 feeds the film 105 strip to the stacking table 1 in a non-oscillating manner.

[0053] Understandably, with this setup, compared to the traditional Z-shaped stacking method for liquid lithium batteries, the composite positive electrode 101 and composite negative electrode 102 of the solid-state battery can be stacked alternately. There is no need to stack a thin film 105 between the composite positive electrode 101 and composite negative electrode 102, so that the thin film 105 does not need to be swung left and right to be transported onto the stacking table 1. During the stacking process of the composite positive electrode 101 and composite negative electrode 102, the unwinding device 8 does not need to transport the thin film 105 to the stacking table 1. The thin film 105 remains stationary. After the electrode assembly 103 is stacked, the cell clamp 43 holds the electrode assembly 103 and the thin film clamp 33 on the stacking table 1. When the cell clamp 43 moves the electrode assembly 103 to the tail winding device 5, it will pull the thin film 105, so that the unwinding device 8 transports a certain length of the thin film 105 onto the stacking table 1. The pressure knife 11 of the stacking table 1 presses down on the thin film 105, thus completing the feeding of the thin film 105.

[0054] The solid-state battery stacking machine with a tail-winding structure of this application optimizes the structure of the stacking machine for the solid-state battery structure. The thin film 105 is no longer fed onto the stacking table 1 in a Z-shaped oscillation manner. The composite positive electrode 101 and the composite negative electrode 102 are directly stacked to form an electrode assembly 103. The thin film 105 is wound onto the electrode assembly 103 by the tail-winding device 5 to form a bare cell 104. The bare cell 104 is formed into a tightly bonded and non-loose bare cell 104 by hot pressing and adhesive bonding. The tail-winding and stacking are separated, thereby improving the production efficiency of solid-state batteries.

[0055] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A solid-state battery stacking machine with a tail-winding structure, characterized in that, The device includes a stacking table, a feeding device, a winding device, and an adhesive applicator. The stacking table uses an electrode feeding device to sequentially stack composite positive and negative electrode sheets onto a thin film on the stacking table to form an electrode assembly. No thin film is inserted between the alternately stacked composite positive and negative electrode sheets within the electrode assembly. The feeding device reciprocates between the stacking table, the winding device, and the adhesive applicator. The feeding device clamps the electrode assembly and the thin film together and moves them to the winding device. The winding device's needles clamp the electrode assembly and the thin film, and by driving the electrode assembly to rotate, it winds the thin film around the outside of the electrode assembly to form a bare cell. The bare cell is moved by the feeding device to the adhesive applicator station, where the adhesive applicator applies fixing tape to the outermost end of the thin film of the bare cell.

2. The solid-state battery stacking machine with a tail-winding structure according to claim 1, characterized in that, The composite positive electrode sheet includes a positive electrode substrate, on which a positive electrode active material slurry and a solid electrolyte slurry are coated.

3. The solid-state battery stacking machine with a tail-winding structure according to claim 1, characterized in that, The composite negative electrode sheet includes a negative electrode substrate, on which a negative electrode active material slurry and a solid electrolyte slurry are coated.

4. The solid-state battery stacking machine with a tail-winding structure according to claim 1, characterized in that, The feeding device includes a film traction assembly and a cell transport assembly, which are mounted on the same linear drive module. The film traction assembly includes a first movable seat, a mounting frame, a film clamp, and a film cutter. The first movable seat is driven by the linear drive module. The mounting frame is fixed below the first movable seat and has a feed port for the electrode assembly and film to pass through. The mounting frame has a film cutter and a film clamp on both sides of the feed port. The cell transport assembly includes a second movable seat, a first rotating seat, and a cell clamp. The second movable seat is driven by the linear drive module. The first rotating seat is movably mounted below the second movable seat via a first rotary motor. The cell clamp is mounted on one side of the first rotating seat and has a clamping arm that can pass through the feed port to clamp the electrode assembly and film located at the stacking table.

5. The solid-state battery stacking machine with a tail-winding structure according to claim 1, characterized in that, The tail winding device includes a winding needle, a needle-pulling moving seat, and a tail winding lifting seat. The winding needle is divided into a first winding needle and a second winding needle. The first winding needle and the second winding needle are respectively mounted on two corresponding needle-pulling moving seats via two second rotating seats. Each of the two needle-pulling moving seats is equipped with a tail winding motor, which is driven by the corresponding second rotating seat. Each of the two second rotating seats is equipped with an opening and closing cylinder that is driven by the first winding needle and the second winding needle, respectively. The tail winding lifting seat is equipped with a needle-pulling motor, which drives the needle-pulling moving seat to move along the needle-pulling guide rail on the tail winding lifting seat via a lead screw pair.

6. The solid-state battery stacking machine with a tail-winding structure according to claim 5, characterized in that, A mounting base is provided below the tail coil lifting seat. A lifting motor and a lifting guide rail are provided on the mounting base. The lifting motor is connected to the tail coil lifting seat through a lifting screw pair. The lifting motor drives the tail coil lifting seat to move along the lifting guide rail.

7. The solid-state battery stacking machine with a tail-winding structure according to claim 1, characterized in that, A hot pressing device is provided between the tail winding device and the adhesive application device. The hot pressing device includes two hot pressing plates arranged vertically. The unloading device moves the bare battery cell to the hot pressing device and performs hot pressing on the bare battery cell through the two hot pressing plates.

8. The solid-state battery stacking machine with a tail-winding structure according to claim 1, characterized in that, The adhesive applicator includes a glue tray, an adhesive separation component, an adhesive cutting component, and an adhesive applicator arranged sequentially along the tape path of a fixed adhesive tape. The glue tray holds a roll of adhesive material. The adhesive separation component includes an adhesive separation cylinder and an adhesive separation roller, which is positioned between two fixed rollers. The adhesive separation cylinder drives the adhesive separation roller to push the fixed adhesive tape between the two fixed rollers, pulling the fixed adhesive tape from the roll of adhesive material. The adhesive cutting component includes a clamping robot and a cutter. The clamping robot grips and pulls the fixed adhesive tape, and the cutter is driven by a cutting cylinder. The adhesive applicator includes an adhesive applicator drive module and an adhesive applicator suction cup. The adhesive applicator drive module drives the adhesive applicator suction cup to reciprocate between the cutting component and the unloading device. The cutting cylinder drives the cutter to cut the fixed adhesive tape adsorbed by the adhesive applicator suction cup, and the adhesive applicator suction cup applies the adsorbed fixed adhesive tape to the outermost thin film tail of the bare battery cell.

9. The solid-state battery stacking machine with a tail-winding structure according to claim 8, characterized in that, The fixing tape is a high-temperature tape.

10. The solid-state battery stacking machine with a tail-winding structure according to claim 1, characterized in that, A unwinding device is provided on one side of the stacking table, which feeds the film strip to the stacking table in a non-oscillating manner.

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