A new energy vehicle dry solid electrode sheet preparation device

Abstract

This invention relates to the field of battery manufacturing technology and discloses a dry solid-state electrode sheet preparation apparatus for new energy vehicles, comprising: an unwinding unit for unwinding a first electrode film, a second electrode film, and a current collector, and positioning the first electrode film and the second electrode film below and above the current collector, respectively; a first continuous pressing unit, located downstream of the unwinding unit, for continuously rolling the unwound first electrode film and the second electrode film, and pressing the first electrode film and the second electrode film onto the lower and upper surfaces of the current collector, respectively, to form a semi-finished electrode sheet; an intermittent pressing unit, located downstream of the first continuous pressing unit, for performing segmented and regional intermittent pressing on the semi-finished electrode sheet, so that internal stress is pre-released in multiple local areas; and a second continuous pressing unit, located downstream of the intermittent pressing unit, for continuously rolling and leveling the intermittently pressed semi-finished electrode sheet to form a finished electrode sheet.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, specifically to a dry solid-state electrode sheet preparation device for new energy vehicles. Background Technology

[0002] Compared to traditional liquid lithium-ion batteries, all-solid-state batteries are widely regarded as the core direction for next-generation power batteries for new energy vehicles due to their advantages such as high intrinsic safety, compatibility with lithium metal anodes, and the potential for higher energy density. Dry solid-state electrode technology, especially the direct composite process of self-supporting dry electrode films and current collectors, is becoming a key cutting-edge technology in the manufacturing of power batteries for new energy vehicles because it avoids solvent recovery, reduces production costs, and has good compatibility with sulfide / oxide solid electrolytes.

[0003] Dry-process solid-state electrode sheets employ a double-sided simultaneous hot-pressing composite process. Due to the instantaneous nature of the composite process, any differences in the thickness, density, formulation, preheating temperature, or thermal shrinkage rate of the two electrode films will generate internal stresses of unequal magnitude and opposite direction on both sides of the current collector after composite formation, causing macroscopic warping of the resulting electrode sheet. If this warping exceeds the requirements for automotive-grade battery cells (warping less than or equal to 1.5mm within a 300mm length), the electrode sheet will be scrapped.

[0004] In existing technologies, the following are some methods for limiting the degree of electrode warping within required limits: The first method involves releasing stress using an S-shaped bending roller. However, due to the low strength of the dry electrode film, cracking and detachment are prone to occur when straightened by the S-shaped bending roller.

[0005] The second method is secondary hot pressing. However, it cannot eliminate asymmetrical stress and may exacerbate stress concentration, leading to increased warping of the electrode sheet.

[0006] The third method involves flattening the electrode sheet in a flat plate pressing device. However, since the flat plate pressing operation is intermittent, the electrode sheet must be removed from the composite production line and requires storage and transportation, which greatly limits the production efficiency of the electrode sheet. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a dry solid-state electrode sheet preparation device for new energy vehicles. This device can reduce the stress generated during the composite process of two electrode films and a current collector, and effectively release the stress during the composite process, avoiding stress concentration. This reduces the degree of warpage at its source, thereby reducing the scrap rate of electrode sheets caused by excessive warpage.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a dry solid-state electrode sheet preparation apparatus for new energy vehicles, comprising: An unwinding unit is used to unwind the first electrode film, the second electrode film, and the current collector, and to position the first electrode film and the second electrode film below and above the current collector, respectively. The first continuous pressing unit is located downstream of the unwinding unit and is used to continuously roll the unwound first electrode film and the second electrode film, and press the first electrode film and the second electrode film onto the lower surface and the upper surface of the current collector, respectively, to form a semi-finished electrode sheet. An intermittent pressing unit is located downstream of the first continuous pressing unit and is used to perform intermittent pressing of the electrode sheet semi-finished product in segments and regions, so that the internal stress is pre-released in multiple local areas. The second continuous pressing unit is located downstream of the intermittent pressing unit and is used to continuously roll and level the electrode sheet semi-finished product after intermittent pressing to form the finished electrode sheet. The thickness of the electrode sheet semi-finished product obtained after continuous rolling processing by the first continuous pressing unit is 90% to 95% of the sum of the thicknesses of the first electrode film, the second electrode film, and the current collector before unwinding; the thickness of the finished electrode sheet is 50% to 70% of the sum of the thicknesses of the first electrode film, the second electrode film, and the current collector before unwinding. The first continuous pressing unit and the second continuous pressing unit have the same structure.

[0009] Preferably, the unwinding unit includes a frame 1, with an unwinding roller 1 and an unwinding roller 2 arranged from top to bottom on the side of the frame 1 away from the first continuous pressing unit, and an unwinding roller 3 arranged above the side of the frame 1 close to the first continuous pressing unit; the unwinding roller 1, the unwinding roller 2 and the unwinding roller 3 are respectively used to unwind the current collector, the first electrode film and the second electrode film.

[0010] Preferably, a hot press plate and a hot press roller are arranged from top to bottom inside the frame and below the unwinding roller. The hot press plate is fixedly installed on the frame. The hot press roller can rotate and can move up and down relative to the hot press plate.

[0011] Preferably, a guide roller is provided inside the frame, on the side of the hot press plate that is horizontally away from the first continuous pressing unit, and the horizontal sectional surface of the lower side of the outer circumference of the guide roller is flush with the lower surface of the hot press plate.

[0012] Preferably, the intermittent pressing unit includes a frame three, and two frames three are provided and respectively located on both sides of the electrode sheet semi-finished product in the width direction; a slide is slidably installed between the two frames three along the length direction of the electrode sheet semi-finished product; When the sliding direction of the slide is the same as the moving direction of the electrode sheet semi-finished product, the sliding speed of the slide is the same as the moving speed of the electrode sheet semi-finished product; when the sliding direction of the slide is opposite to the moving direction of the electrode sheet semi-finished product, the sliding speed of the slide is greater than the moving speed of the electrode sheet semi-finished product.

[0013] Preferably, there are two carriages located on both sides of the electrode sheet semi-finished product height direction; each carriage is vertically equipped with a lifting device three, the moving end of the lifting device three points to the electrode sheet semi-finished product, and the end of each device is fixedly connected to a fixing plate. Two mounting plates are arranged vertically between the two carriages; multiple hot press plates are evenly spaced along the length of the electrode sheet semi-finished product at the ends of the two mounting plates that are close to each other; a fixing plate is installed at the ends of the two mounting plates that are far apart from each other.

[0014] Preferably, the fixing plate and the corresponding mounting plate are slidably connected together along the length of the electrode sheet semi-finished product; a cylinder is installed between the fixing plate and the corresponding mounting plate to drive the mounting plate to slide relative to the fixing plate.

[0015] Preferably, each of the two hot press plates is equipped with guide blocks at both ends along the length of the electrode sheet semi-finished product; the end face of the guide block facing the electrode sheet semi-finished product is inclined from the hot press plate to the side away from the electrode sheet semi-finished product, and the two guide blocks between two adjacent hot press plates abut against each other.

[0016] Compared with the prior art, the present invention provides a dry solid-state electrode sheet preparation device for new energy vehicles, which has the following advantages: 1. Effectively suppress electrode warpage and reduce scrap rate: The first continuous pressing unit compresses the thickness to 90%–95% of the original total thickness, allowing the electrode film and current collector to initially combine while retaining a large thickness, avoiding excessive internal stress caused by large deformation at one time; the intermittent pressing unit segments and zones the semi-finished product for pressing, releasing internal stress through the gaps between the pressing areas to prevent stress concentration and reduce warpage at its source; the second continuous pressing unit further flattens the product to 50%–70% of the final thickness, ensuring that the flatness of the finished product meets automotive-grade requirements, thereby significantly reducing the scrap rate caused by excessive warpage.

[0017] 2. Avoiding electrode film damage and ensuring electrode quality: In the intermittent pressing unit, by fixing guide blocks at both ends of the second hot press plate and tilting the guide blocks towards the end face of the electrode sheet semi-finished product from the second hot press plate away from the electrode sheet semi-finished product, and with the two guide blocks between two adjacent second hot press plates abutting each other, vertical cross-sections can be avoided on the electrode film during hot pressing, reducing fiber breakage, maintaining the structural integrity and electrochemical performance of the electrode film, and avoiding the cracking and detachment problems caused by the traditional S-shaped bending roller straightening method for dry electrode films.

[0018] 3. Enables continuous online production and improves efficiency: The device integrates unwinding, three-stage pressing, and rewinding functions. The electrode sheet moves continuously on the production line without needing to be removed midway for separate flat pressing, eliminating storage, transfer, and secondary clamping processes, and greatly improving production efficiency. The carriage in the intermittent pressing unit can move in the same direction and at the same speed as the electrode sheet, completing intermittent pressing in the dynamic process without interrupting the production line cycle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a plan view of the present invention; Figure 3 This is a schematic diagram of the overall structure of the hot press roller one; Figure 4 This is a schematic diagram of the internal structure of the roller body; Figure 5 This is a schematic diagram of the internal structure of the hot press roller 1; Figure 6 This is a plan view of the first continuous pressing unit; Figure 7 This is a partial structural diagram of the intermittent pressing unit.

[0020] Wherein: 100, unwinding unit; 200, first continuous pressing unit; 300, intermittent pressing unit; 400, second continuous pressing unit; 10. Frame 1; 11. Unwinding Roller 1; 12. Unwinding Roller 2; 13. Unwinding Roller 3; 14. Hot Press Plate 1; 15. Hot Press Roller 1; 16. Guide Roller 1; 17. Guide Roller 2; 18. Lifting Device 1; 150. Roller body; 1501. Central cavity; 1502. Guide channel one; 1503. Guide channel two; 151. Support; 1511. Limiting rod; 152. Connecting pipe; 1521. Guide hole; 153. Pipe joint; 154. Central pipe; 1541. Sealing sleeve; 20. Frame 2; 21. Hot press roller 2; 22. Lifting device 2; 30. Frame 3; 31. Slide; 32. Lifting device 3; 33. Fixing plate; 34. Mounting plate; 35. Cylinder; 36. Hot press plate 2; 37. Guide block; 38. Transverse movement device. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1 to 7 The present invention provides a dry solid-state electrode sheet preparation apparatus for new energy vehicles, comprising: The unwinding unit 100 is used to unwind the first electrode film, the second electrode film, and the current collector, and to position the first electrode film and the second electrode film below and above the current collector, respectively. The first continuous pressing unit 200 is located downstream of the unwinding unit 100 and is used to continuously roll the unwound first electrode film and the second electrode film, and press the first electrode film and the second electrode film onto the lower surface and the upper surface of the current collector, respectively, to form a semi-finished electrode sheet. Intermittent pressing unit 300 is located downstream of the first continuous pressing unit 200 and is used to perform segmented and regional intermittent pressing on the electrode sheet semi-finished product so that the internal stress is pre-released in multiple local areas. The second continuous pressing unit 400 is located downstream of the intermittent pressing unit 300 and is used to continuously roll and level the electrode sheet semi-finished product after intermittent pressing to form the finished electrode sheet. The thickness of the electrode sheet semi-finished product obtained after continuous rolling processing by the first continuous pressing unit 200 is 90% to 95% of the sum of the thicknesses of the first electrode film, the second electrode film, and the current collector before unwinding; the thickness of the finished electrode sheet is 50% to 70% of the sum of the thicknesses of the first electrode film, the second electrode film, and the current collector before unwinding.

[0023] Specifically, the unwinding unit 100 includes a frame 10. Unwinding roller 11 and unwinding roller 22 are arranged from top to bottom on the side of the frame 10 away from the first continuous pressing unit 200. Unwinding roller 313 is arranged above the side of the frame 10 close to the first continuous pressing unit 200. Unwinding roller 11, unwinding roller 212 and unwinding roller 313 are used to unwind the current collector, the first electrode film and the second electrode film, respectively.

[0024] Inside the frame 10, below the unwinding roller 3 13, a hot press plate 14 and a hot press roller 15 are arranged from top to bottom. The hot press plate 14 is fixedly installed on the frame 10, and a lifting device 18 for driving the hot press roller 15 to move up and down relative to the hot press plate 14 is installed between the hot press roller 15 and the frame 10.

[0025] Inside the frame 10, on the side of the hot press plate 14 that is horizontally away from the first continuous pressing unit 200, a guide roller 16 is provided. The horizontal tangent of the lower side of the outer circumference of the guide roller 16 is flush with the lower surface of the hot press plate 14.

[0026] The guide roller 16 is used to guide the unwound current collector and to make the current collector moving horizontally from below the guide roller 16, passing sequentially between the hot press plate 14 and the hot press roller 15, the first continuous pressing unit 200, the intermittent pressing unit 300 and the second continuous pressing unit 400.

[0027] The hot press roller 15 is used to guide the unwound first electrode film and to make the first electrode film, which passes over the hot press roller 15, abut against the lower surface of the current collector and move with the current collector.

[0028] The hot press roller 15 is also used in conjunction with the hot press plate 14 to heat the first electrode film and the current collector. The hot press roller 15 is also used to move upward when the first electrode film is heated to perform continuous rolling pressing on the first electrode film, so that the first electrode film and the current collector are initially pressed together.

[0029] Inside the frame 10, between the hot press plate 14 and the unwinding roller 13, there is a guide roller 17, which is close to the first continuous pressing unit 200. The guide roller 17 is used to guide the unwound second electrode film and make it fall on the upper surface of the current collector between the hot press plate 14 and the first continuous pressing unit 200, and move with the current collector.

[0030] Unwinding roller 11, unwinding roller 212 and unwinding roller 313 are driven independently by three motors mounted on frame 10.

[0031] The first continuous pressing unit 200 and the second continuous pressing unit 400 have the same structure.

[0032] The first continuous pressing unit 200 includes a frame 20. Two hot pressing rollers 21 are arranged symmetrically vertically within the frame 20. A lifting device 22 is installed between the ends of the two hot pressing rollers 21 that are far apart from each other and the frame 20. The two lifting devices 22 work together to adjust the distance between the two hot pressing rollers 21, so that the two hot pressing rollers 21 can cooperate to achieve hot pressing of the electrode film on the current collector.

[0033] As a further explanation of the above technical solution, the hot press roller 15 includes a roller body 150, which is a cylindrical structure with smaller ends and a larger middle. A support 151 is rotatably mounted on the outer circumference of the two ends with smaller diameters on the roller body 150 via bearings. Both supports 151 are fixedly installed on the output end of the lifting device 18.

[0034] A groove for mounting a connecting key is provided on the outer circumference of the smaller diameter end of the roller body 150, so that the roller body 150 can be connected to an external rotary drive device via the keyway structure. The external rotary drive device drives the roller body 150 to rotate. A connecting pipe 152 is coaxially fixedly connected to the other smaller diameter end of the roller body 150.

[0035] A central cavity 1501 is provided inside the roller body 150 along the central axis, and the central cavity 1501 communicates with the inner cavity of the connecting pipe 152. At least two heating channels are evenly spaced along the circumference at the larger diameter end of the roller body 150; each heating channel has an opening at both ends. A central tube 154 is disposed within the central cavity 1501. One end of the central tube 154 extends between the openings at both ends of the heating flow channel, and a sealing sleeve 1541 is disposed between the outer circumferential surface and the cavity wall of the central cavity 1501. The end of the central tube 154 away from the sealing sleeve 1541 passes through the connecting tube 152, and the end is sealed with the connecting tube 152. With this arrangement, the inner circumferential surface of the connecting tube 152, the outer circumferential surface of the central tube 154, and the cavity wall of the central cavity 1501 located between the sealing sleeve 1541 and the connecting tube 152 together form an outer flow channel, which communicates with one opening of the heating flow channel; the inner cavity of the central tube 154 and the central cavity 1501 away from the connecting tube 152 together form an inner flow channel, which communicates with the other opening of the heating flow channel.

[0036] Furthermore, a pipe joint 153 is fitted and rotatably connected to the outer circumferential surface of the end of the connecting pipe 152 away from the roller body 150; a frustum is formed on the outer circumferential surface of the connecting pipe 152 located inside the pipe joint 153, and a guide hole 1521 is provided on the frustum. The guide hole 1521 radially penetrates the outer circumferential surface of the frustum and connects to the outer flow channel.

[0037] The pipe joint 153 is equipped with two external interfaces, which connect to the inner flow channel and the outer flow channel, respectively. These two interfaces are used to connect the high-temperature fluid and discharge the low-temperature fluid. It should be noted that the low-temperature fluid is obtained by the high-temperature fluid entering the heating channel and heating the electrode film. It should also be noted that the fluid is water or heat transfer oil.

[0038] Furthermore, a limit rod 1511 is installed on the support 151 corresponding to the pipe joint 153. The limit rod 1511 passes through the pipe joint 153 and is used to keep the pipe joint 153 stationary when the roller body 150 rotates.

[0039] It should be noted that the structures of hot press roller 15 and hot press roller 21 are identical. The connection method between hot press roller 15 and lifting device 18 is the same as the connection method between hot press roller 21 and lifting device 22. When hot press roller 15 and hot press roller 21 are driven by their respective lifting devices to move up and down, they both move up and down in the vertical direction.

[0040] Both lifting device 18 and lifting device 22 are any one of electric push rod, hydraulic cylinder or electro-hydraulic push rod.

[0041] It should be noted that the example of the heating flow channel provided in this technical solution is as follows: Figure 4 and Figure 5 As shown. Specifically, the heating flow channel includes flow guide channel one 1502 and flow guide channel two 1503; Among them, the flow guide channel 1502 is opened along the axial direction of the roller body 150, and there are three of them; the three flow guide channels 1502 are arranged at intervals along the circumference of the roller body 150, and the three flow guide channels 1502 are connected end to end along the fluid flow direction to form a flow channel group. There are two flow channels 1503; one end of each flow channel 1503 is connected to the central cavity 1501 and to the inner flow channel and the outer flow channel respectively; the other end of each flow channel 1503 is connected to the two end openings of the flow channel group respectively.

[0042] Method 1 of using the hot press roller 15: When the outer interface connected to the inner flow channel is used to receive high-temperature fluid, the high-temperature fluid enters the guide channel 2 1503 connected to it through the inner flow channel, and then enters the flow channel group, heating the outer circumferential surface of the larger diameter end of the roller body 150, so that the electrode film in contact with the outer circumferential surface is heated to the hot pressing temperature; then, it enters the outer flow channel through the guide channel 2 1503 connected to the outer flow channel, and is discharged through the outer interface connected to the outer flow channel.

[0043] Method 2 for using the hot press roller 15: When the external interface connected to the external flow channel is used to connect to high-temperature fluid, the flow direction of the fluid is opposite to that in method 1.

[0044] As a further explanation of the above technical solution, the intermittent pressing unit 300 includes a frame three 30. There are two frames three 30, which are respectively arranged on both sides of the width direction of the electrode sheet semi-finished product, and both are fixedly connected to the frame two 20.

[0045] Two slide carriages 31 are slidably mounted between the two frames 30 along the length of the semi-finished electrode sheet. Each slide carriage 31 is located on one side of the semi-finished electrode sheet in the height direction. A transverse movement device 38 is mounted on each of the two frames 30. The two transverse movement devices 38 are used to drive the two slide carriages 31 to slide. It should be noted that the transverse movement device 38 can be either a lead screw module or a linear motor module.

[0046] It should be noted that when the sliding direction of the slide 31 is the same as the moving direction of the electrode sheet semi-finished product, the sliding speed of the slide 31 is the same as the moving speed of the electrode sheet semi-finished product. When the sliding direction of the slide 31 is opposite to the moving direction of the electrode sheet semi-finished product, the sliding speed of the slide 31 is greater than the moving speed of the electrode sheet semi-finished product.

[0047] Both carriages 31 are vertically equipped with lifting devices 32, the moving ends of which point towards the electrode sheet semi-finished product, and the ends of both devices are fixedly connected to a fixing plate 33. The fixing plate 33 is moved vertically relative to the electrode sheet semi-finished product, i.e., at its height, by the lifting devices 32. It should be noted that the lifting devices 32 can be any one of an electric actuator, a hydraulic cylinder, or an electro-hydraulic actuator.

[0048] Two mounting plates 34 are arranged vertically between the two slides 31; multiple hot press plates 36 are evenly spaced along the length of the electrode sheet semi-finished product at the ends of the two mounting plates 34 that are close to each other; a fixing plate 33 is installed at the ends of the two mounting plates 34 that are far from each other.

[0049] When the slide 31 moves in the same direction as the electrode sheet semi-finished product, the two lifting devices 32 work together to push the upper and lower hot pressing plates 36 to hot press the second electrode film and the first electrode film respectively; the gap between the two adjacent hot pressing plates 36 is used to release stress, thereby reducing the internal stress during the hot pressing process of the current collector.

[0050] Furthermore, the fixing plate 33 and the corresponding mounting plate 34 are slidably connected together along the length of the electrode sheet semi-finished product; a cylinder 35 is installed between the fixing plate 33 and the corresponding mounting plate 34 to drive the mounting plate 34 to slide relative to the fixing plate 33. Therefore, when the hot pressing plate 36 performs hot pressing, the hot pressing plates 36 on both sides of the electrode sheet semi-finished product can be aligned directly opposite each other, or the hot pressing plates 36 on both sides of the electrode sheet semi-finished product can be staggered, thereby improving the hot pressing effect and further reducing stress.

[0051] Furthermore, each of the two hot press plates 36 is equipped with guide blocks 37 at both ends along the length of the electrode sheet semi-finished product. The end face of the guide block 37 facing the electrode sheet semi-finished product is inclined from the hot press plate 36 away from the electrode sheet semi-finished product, and the two guide blocks 37 between two adjacent hot press plates 36 abut against each other, so as to avoid the formation of a vertical cross section during hot pressing of the electrode film, reduce the number of fiber breaks inside the electrode film caused by the hot pressing of the hot press plate 36, and ensure the quality of the electrode film.

[0052] It should be noted that both hot press plate 14 and hot press plate 36 are electric heating plates.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dry solid-state electrode sheet preparation apparatus for new energy vehicles, characterized in that, include: An unwinding unit (100) is used to unwind a first electrode film, a second electrode film, and a current collector, and to position the first electrode film and the second electrode film below and above the current collector, respectively. The first continuous pressing unit (200) is located downstream of the unwinding unit (100) and is used to continuously roll the unwound first electrode film and the second electrode film, and press the first electrode film and the second electrode film onto the lower surface and the upper surface of the current collector, respectively, to form a semi-finished electrode sheet. An intermittent pressing unit (300) is located downstream of the first continuous pressing unit (200) and is used to perform intermittent pressing treatment on the electrode sheet semi-finished product in segments and regions, so that the internal stress is pre-released in multiple local areas. The second continuous pressing unit (400) is located downstream of the intermittent pressing unit (300) and is used to continuously roll and level the electrode sheet semi-finished product after intermittent pressing to form the finished electrode sheet. The thickness of the electrode sheet semi-finished product obtained after continuous rolling processing by the first continuous pressing unit (200) is 90% to 95% of the sum of the thicknesses of the first electrode film, the second electrode film, and the current collector before unwinding; the thickness of the electrode sheet finished product is 50% to 70% of the sum of the thicknesses of the first electrode film, the second electrode film, and the current collector before unwinding. The first continuous pressing unit (200) and the second continuous pressing unit (400) have the same structure.

2. The apparatus for preparing dry solid-state electrode sheets for new energy vehicles according to claim 1, characterized in that, The unwinding unit (100) includes a frame (10), and an unwinding roller (11) and an unwinding roller (12) are arranged from top to bottom on the side of the frame (10) away from the first continuous pressing unit (200). An unwinding roller (13) is arranged above the side of the frame (10) close to the first continuous pressing unit (200). The unwinding roller (11), the unwinding roller (12) and the unwinding roller (13) are respectively used to unwind the current collector, the first electrode film and the second electrode film.

3. The apparatus for preparing dry solid-state electrode sheets for new energy vehicles according to claim 2, characterized in that, A hot press plate (14) and a hot press roller (15) are arranged from top to bottom inside the frame (10) and below the unwinding roller (13); the hot press plate (14) is fixedly installed on the frame (10); the hot press roller (15) is rotatable and can move up and down relative to the hot press plate (14).

4. The apparatus for preparing dry solid-state electrode sheets for new energy vehicles according to claim 3, characterized in that, Inside the frame (10), on the side of the hot press plate (14) away from the first continuous pressing unit (200) in the horizontal direction, a guide roller (16) is provided. The horizontal cross-section of the lower side of the outer circumference of the guide roller (16) is flush with the lower surface of the hot press plate (14).

5. The apparatus for preparing dry solid-state electrode sheets for new energy vehicles according to claim 1, characterized in that, The intermittent pressing unit (300) includes a frame three (30), two of which are respectively arranged on both sides of the width direction of the electrode sheet semi-finished product; a slide (31) is slidably installed between the two frames three (30) along the length direction of the electrode sheet semi-finished product. When the sliding direction of the slide (31) is consistent with the moving direction of the electrode sheet semi-finished product, the sliding speed of the slide (31) is consistent with the moving speed of the electrode sheet semi-finished product; when the sliding direction of the slide (31) is opposite to the moving direction of the electrode sheet semi-finished product, the sliding speed of the slide (31) is greater than the moving speed of the electrode sheet semi-finished product.

6. The apparatus for preparing dry solid-state electrode sheets for new energy vehicles according to claim 5, characterized in that, Two slides (31) are provided and located on both sides of the height direction of the electrode sheet semi-finished product; each of the two slides (31) is vertically equipped with a lifting device three (32), the moving end of the lifting device three (32) points to the electrode sheet semi-finished product, and the end is fixedly connected to a fixing plate (33). Two mounting plates (34) are arranged vertically and intermittently between the two slides (31); multiple hot press plates (36) are evenly spaced along the length of the electrode sheet semi-finished product at the ends of the two mounting plates (34) that are close to each other; a fixing plate (33) is installed at the ends of the two mounting plates (34) that are far apart from each other.

7. The apparatus for preparing dry solid-state electrode sheets for new energy vehicles according to claim 6, characterized in that, The fixing plate (33) and the corresponding mounting plate (34) are slidably connected together along the length of the electrode sheet semi-finished product; a cylinder (35) is installed between the fixing plate (33) and the corresponding mounting plate (34) to drive the mounting plate (34) to slide relative to the fixing plate (33).

8. The apparatus for preparing dry solid-state electrode sheets for new energy vehicles according to claim 7, characterized in that, Each of the two hot press plates (36) is equipped with guide blocks (37) at both ends of the electrode sheet semi-finished product along the length direction; the guide blocks (37) are inclined from the hot press plate (36) away from the electrode sheet semi-finished product at one end face, and the two guide blocks (37) between two adjacent hot press plates (36) abut against each other.

Images