Dry electrode planar pre-press forming device and battery manufacturing equipment

Abstract

The utility model belongs to battery processing technical field discloses a kind of dry method electrode plane pre-press forming device and battery manufacturing equipment, including conveying mechanism and successively setting on conveying mechanism's blanking mechanism, scraping piece and pre-press roll mechanism. Conveying mechanism is used to convey electrode powder material;Blanking mechanism includes blanking hopper and vibrator, blanking hopper blanking mouth is located at the top of the conveying plane of conveying mechanism, blanking hopper is used to supply electrode powder material to conveying plane;Vibrator is set on blanking hopper, and vibrator is used to provide vibration for blanking hopper;Scraping piece is used to carry out uniform leveling treatment to electrode powder material on conveying plane and form raw material layer;Pre-press roll mechanism is used to pre-press raw material layer and form diaphragm. The dry method electrode plane pre-press forming device can improve the uniformity of electrode powder material distribution and initial density, improve yield and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, and in particular to a dry electrode planar pre-pressing forming device and battery manufacturing equipment. Background Technology

[0002] Currently, liquid lithium-ion batteries are commonly used in the new energy vehicle industry. However, existing lithium-ion batteries generally use flammable liquid electrolytes, making it difficult to simultaneously meet the urgent demands of industries such as electric vehicles, energy storage, electric aviation, and smart terminals for high energy density, high safety, and long lifespan. Therefore, solid-state batteries, with their high energy density, high safety, and long lifespan, are globally recognized as the preferred technology to replace existing lithium-ion batteries. Consequently, solid-state batteries have become a major research focus in the current new energy market.

[0003] In solid-state batteries, dry electrode fabrication is one of the most important processes, affecting the battery's performance. Current dry electrode fabrication techniques mostly employ a method where a feeding funnel is directly connected to the rollers. This inevitably leads to serious defects such as uneven feeding, breakage, and defective sheets, impacting product yield and resulting in low production efficiency, which hinders the improvement of rolling speed.

[0004] Therefore, there is an urgent need for a dry electrode planar pre-pressing molding device and battery manufacturing equipment to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a dry electrode planar pre-pressing molding device that can improve the uniformity of electrode powder distribution and initial density, thereby increasing yield and production efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A dry electrode planar pre-pressing forming device includes:

[0008] A conveying mechanism used to transport electrode powder;

[0009] A feeding mechanism is provided on the conveying mechanism. The feeding mechanism includes a feeding hopper and a vibrator. The feeding port of the feeding hopper is located at the top of the conveying plane of the conveying mechanism. The feeding hopper is used to supply the electrode powder to the conveying plane. The vibrator is provided on the feeding hopper and is used to provide vibration to the feeding hopper.

[0010] A leveling component is disposed on the conveying mechanism and located downstream of the material dropping mechanism along the conveying direction. The leveling component is used to uniformly level the electrode powder on the conveying plane to form a raw material layer.

[0011] A pre-pressing roller mechanism is disposed on the above-mentioned conveying mechanism and located downstream of the above-mentioned scraper in the conveying direction. The pre-pressing roller mechanism is used to pre-press the above-mentioned raw material layer to form a film.

[0012] Optionally, the above-mentioned conveying mechanism includes:

[0013] Fixed frame;

[0014] The driving wheel and the driven wheel are spaced apart and rotatably connected to the fixed frame. One end of the driving wheel is connected to a first driving member, which is used to drive the driving wheel to rotate.

[0015] The conveyor belt is wound around the aforementioned driving wheel and the aforementioned driven wheel and is tensioned by the aforementioned driving wheel and the aforementioned driven wheel together.

[0016] Optionally, the outer periphery of the aforementioned driving wheel is provided with a first annular groove, the outer periphery of the aforementioned driven wheel is provided with a second annular groove, and along the circumference of the aforementioned conveyor belt, the inner sidewall of the aforementioned conveyor belt is provided with annular protrusions that correspond one-to-one with the aforementioned first annular groove and the aforementioned second annular groove, so as to limit the aforementioned conveyor belt.

[0017] Optionally, baffles are also provided on both sides of the fixed frame. The baffles extend along the conveying direction and are used to prevent the electrode powder from overflowing.

[0018] Optionally, the material feeding mechanism further includes a material feeding mounting plate, which is disposed on the conveying mechanism. The material feeding hopper is fixed to the material feeding mounting plate, and the vibrator is disposed on the material feeding mounting plate. The vibrator is used to provide vibration to drive the material feeding mounting plate and the material feeding hopper to vibrate.

[0019] Optionally, the above-mentioned preload roller mechanism includes:

[0020] The mounting frame is installed on the aforementioned conveying mechanism;

[0021] The second driving component is mounted on the aforementioned mounting frame;

[0022] The pre-compression roller is rotatably connected to the mounting frame and located at the top of the conveying plane. The pre-compression roller is connected to the output end of the second drive member. The pre-compression roller can be driven by the second drive member to rotate in order to pre-compress the raw material layer on the conveying plane.

[0023] Optionally, the pre-compression direction of the pre-compression roller on the raw material layer is opposite to the conveying direction of the conveying plane.

[0024] Optionally, the position between the preload roller and the conveying plane is adjustable along a direction perpendicular to the conveying plane.

[0025] Optionally, the position of the scraper relative to the conveying plane can be adjusted along a direction perpendicular to the conveying plane.

[0026] Another objective of this invention is to provide a battery manufacturing apparatus, including the aforementioned dry electrode planar pre-pressing molding device.

[0027] The beneficial effects of this utility model are:

[0028] This invention provides a dry electrode planar pre-pressing forming device and battery manufacturing equipment. During the conveying process of electrode powder, a feeding mechanism, a leveling component, and a pre-pressing roller mechanism are sequentially arranged to feed, level, and press the electrode powder, pre-forming it into a film. The feeding mechanism includes a feeding hopper and a vibrator mounted on the hopper. The vibration of the vibrator increases the feeding speed and uniformity of the electrode powder within the hopper. Furthermore, the subsequent leveling by the leveling component and the pre-pressing forming by the pre-pressing roller mechanism further improve the uniformity of the electrode powder during pre-pressing, avoiding serious defects such as uneven feeding, breakage, and defective films, thus improving production efficiency. Attached Figure Description

[0029] Figure 1 This is an isometric view of the dry electrode planar pre-pressing forming device provided in Embodiment 1 of this utility model;

[0030] Figure 2 This is a side view of the dry electrode plane pre-pressing forming device provided in Embodiment 1 of this utility model.

[0031] In the picture:

[0032] 10. Conveying mechanism; 101. Conveying plane; 11. Fixed frame; 111. Side plate; 112. Support plate; 113. Baffle plate; 12. Drive wheel; 13. Driven wheel; 14. First driving component; 15. Conveyor belt;

[0033] 20. Material feeding mechanism; 21. Material feeding hopper; 22. Vibrator; 23. Material feeding mounting plate;

[0034] 30. Scraping parts;

[0035] 40. Preload roller mechanism; 41. Mounting frame; 42. Second drive component; 43. Preload roller. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] Example 1

[0041] First, this embodiment provides a dry electrode planar pre-pressing forming apparatus, which is used to pre-press electrode powder to form a film.

[0042] It should be noted that the conveying direction in this embodiment is... Figure 1 and Figure 2 The X direction in the equation.

[0043] Please refer to Figure 1 and Figure 2Specifically, the dry electrode planar pre-pressing forming device includes a conveying mechanism 10, a feeding mechanism 20, a leveling component 30, and a pre-pressing roller mechanism 40. The conveying mechanism 10 is used to convey electrode powder; the feeding mechanism 20 is disposed on the conveying mechanism 10, and the feeding mechanism 20 includes a feeding hopper 21 and a vibrator 22. The feeding port of the feeding hopper 21 is located at the top of the conveying plane 101 of the conveying mechanism 10, and the feeding hopper 21 is used to supply electrode powder to the conveying plane 101; the vibrator 22 is disposed on the feeding hopper 21, and the vibrator 22 is used to provide vibration to the feeding hopper 21; the leveling component 30 is disposed on the conveying mechanism 10 and located downstream of the feeding mechanism 20 along the conveying direction, and the leveling component 30 is used to uniformly level the electrode powder on the conveying plane 101 to form a raw material layer; the pre-pressing roller mechanism 40 is disposed on the conveying mechanism 10 and located downstream of the leveling component 30 along the conveying direction, and the pre-pressing roller mechanism 40 is used to pre-press the raw material layer to form a film.

[0044] In this embodiment, the dry electrode planar pre-pressing forming device, during the dry electrode sheet pre-pressing forming process, allows electrode powder to fall rapidly and uniformly onto the conveying plane 101 of the conveying mechanism 10 under the action of the hopper 21 and vibrator 22, thereby improving the uniformity of the material falling. Then, during the conveying process of the conveying mechanism 10, the leveling component 30 levels the electrode powder on the conveying plane 101, forming a raw material layer of uniform thickness. Next, the pre-pressing forming is performed by the pre-pressing roller mechanism 40, causing the raw material layer to form a film, thus completing the pre-pressing forming of the dry electrode sheet. In other words, this dry electrode planar pre-pressing forming device improves the falling speed and uniformity by adding a vibrator 22 to the hopper 21, adding a leveling component 30 for leveling, and using a pre-pressing roller for pre-pressing, further improving the uniformity of the electrode powder during the pre-pressing forming process, avoiding serious defects such as uneven falling, breakage, and broken sheets, and improving production efficiency.

[0045] It should be noted that the aforementioned electrode powder is a powder mixture formed by mixing active materials, binders, and conductive additives during the dry electrode sheet preparation process, and is used to manufacture electrode sheets. The active material can be selected according to the polarity of the electrode sheet being prepared; that is, a positive electrode active material is used for the positive electrode sheet, and a negative electrode active material is used for the negative electrode sheet. The binder can be polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), or other binders. The conductive additive can be carbon-based materials or other conductive additives. For example, the active material of the positive electrode sheet includes a mixture of lithium manganese iron phosphate as the active material, PVDF as the binder, and carbon-based materials as the conductive additive. The active material of the negative electrode sheet includes a mixture of graphite as the active material, PVDF as the binder, and carbon-based materials as the conductive additive.

[0046] Please continue to refer to Figure 1 and Figure 2In this embodiment, the conveying mechanism 10 includes a fixed frame 11, a driving wheel 12, a driven wheel 13, a first driving member 14, and a conveyor belt 15. The driving wheel 12 and the driven wheel 13 are spaced apart and rotatably connected to the fixed frame 11. One end of the driving wheel 12 is connected to the first driving member 14, which drives the driving wheel 12 to rotate. The conveyor belt 15 is wound around the driving wheel 12 and the driven wheel 13 and is tensioned by both the driving wheel 12 and the driven wheel 13. In use, the first driving member 14 is activated to drive the driving wheel 12 to rotate, which in turn drives the conveyor belt 15 to rotate, thereby causing the driven wheel 13 to rotate as well. This causes the conveyor belt 15 to rotate around the driving wheel 12 and the driven wheel 13, thus realizing the conveying of electrode powder.

[0047] The conveying plane 101 is a part of the conveyor belt 15 located at the top of the driving wheel 12 and the driven wheel 13, that is, the top surface of the conveyor belt 15, which is used to convey the electrode powder.

[0048] Specifically, the fixed frame 11 includes two side plates 111 and a support plate 112. The two side plates 111 are spaced apart, and the support plate 112 is disposed between the two side plates 111. Both ends of the support plate 112 are fixedly connected to the two side plates 111, respectively. Thus, the support plate 112 and the two side plates 111 are connected to form a support frame for supporting other structures of the conveying mechanism 10. More specifically, both ends of the two side plates 111 are rotatably connected to the driving wheel 12 and the driven wheel 13, respectively. The support plate 112 is disposed between the driving wheel 12 and the driven wheel 13, without affecting the installation and movement of the driving wheel 12 and the driven wheel 13. The conveyor belt 15 is disposed between the two side plates 111 and wound around the driving wheel 12 and the driven wheel 13. This arrangement forms the fixed structure of the conveying mechanism 10 and supports the entire dry electrode plane pre-pressing forming device.

[0049] Optionally, the support plate 112 is made of 3mm-5mm steel plate to improve the support strength of the fixed frame 11.

[0050] Optionally, either end of the support plate 112 can be threadedly connected to the side plate 111 to fix the two together.

[0051] Specifically, baffle plates 113 are provided on both sides of the fixed frame 11, that is, baffle plates 113 are provided on both side plates 111. The baffle plates 113 extend along the conveying direction and are used to prevent electrode powder from overflowing, thereby improving the reliability of material conveying.

[0052] Specifically, both a drive pulley 12 and a driven pulley 13 are provided, and both are roller-shaped structures to achieve the transmission function of the conveyor belt 15. Optionally, the surfaces of the drive pulley 12 and the driven pulley 13 are embossed to increase the surface friction coefficient of the drive pulley 12 and the driven pulley 13, effectively preventing the conveyor belt 15 from slipping.

[0053] Optionally, the outer periphery of the drive wheel 12 is provided with a first annular groove, and the outer periphery of the driven wheel 13 is provided with a second annular groove. Along the circumference of the conveyor belt 15, the inner sidewall of the conveyor belt 15 is provided with annular protrusions that correspond one-to-one with the first and second annular grooves to limit the movement of the conveyor belt 15. This arrangement can prevent the conveyor belt 15 from deviating during operation, thereby improving the conveying reliability of the conveying mechanism 10.

[0054] Specifically, the first annular groove is arranged on the outer periphery of the drive wheel 12 at any position along its own axial direction, the second annular groove is arranged on the outer periphery of the driven wheel 13 at any position along its own axial direction, and the annular protrusion is arranged on the inner periphery of the inner wall of the conveyor belt 15 at any position along its own width direction, and they correspond one-to-one with the first annular groove and the second annular groove, making it easier for both the first annular groove and the second annular groove to engage with the annular protrusion. For example, the first annular groove is located at the middle of the drive wheel 12 along its own axial direction, the second annular groove is located at the middle of the driven wheel 13 along its own axial direction, and the annular protrusion is located at the middle of the inner wall of the conveyor belt 15 along its own width direction.

[0055] Optionally, the first driving component 14 is a motor, which facilitates the rotational drive of the drive wheel 12 and allows for easy speed control. Of course, in other embodiments, the first driving component 14 can also be other driving structures, as long as they satisfy the requirement of driving the rotation of the drive wheel 12; no specific limitation is made here.

[0056] Specifically, the conveying mechanism 10 also includes a tensioning device, which is rotatably connected to the fixed frame 11 and connected to the conveyor belt 15 for tensioning the conveyor belt 15.

[0057] Optionally, the tensioning device includes a tensioning wheel, which is disposed on one side of the conveyor belt 15 and abuts against the conveyor belt 15. The tensioning wheel can be adjusted in position in the direction toward or away from the conveyor belt 15 to achieve tensioning of the conveyor belt 15. The structure for adjusting the position of the tensioning wheel in the direction toward or away from the conveyor belt 15 can be achieved using an elongated hole and bolts. Specifically, an elongated hole is provided on the side plate 111 of the fixed frame 11 in the direction toward or away from the conveyor belt 15, and bolts pass through the tensioning wheel fixing plate and are fixedly connected to the elongated hole. The tensioning wheel is rotatably connected to the tensioning wheel fixing plate, thus achieving position adjustment of the tensioning wheel.

[0058] Furthermore, the material feeding mechanism 20 also includes a material feeding mounting plate 23, which is mounted on the fixed frame 11. The material feeding hopper 21 is fixed to the material feeding mounting plate 23, and the vibrator 22 is mounted on the material feeding mounting plate 23 to provide vibration to drive the material feeding mounting plate 23 and the material feeding hopper 21 to vibrate. The material feeding mounting plate 23 serves to install, connect, and support the material feeding hopper 21 and the vibrator 22.

[0059] Specifically, the material unloading mounting plate 23 includes a top plate and several connecting columns. The connecting columns are located at the bottom of the top plate and are connected to the side plate 111 of the fixed frame 11 to realize the connection between the material unloading mounting plate 23 and the fixed frame 11.

[0060] The hopper 21 has an installation part on its outer periphery, which is connected to the discharge mounting plate 23 to achieve a fixed connection between the two.

[0061] Optionally, the mounting part and the unloading mounting plate 23, as well as the vibrator 22 and the unloading mounting plate 23, can be connected by threaded connection, welding, snap-fit ​​or plug-in connection, etc., without specific limitation.

[0062] Specifically, in the feeding mechanism 20, the top of the feeding hopper 21 is provided with a feeding port and the bottom is provided with a discharge port. The electrode powder enters from the feeding port and flows out from the discharge port, thereby realizing the feeding of the electrode powder.

[0063] Optionally, the hopper 21 is wider at the top and narrower at the bottom to facilitate the entry and uniform output of electrode powder.

[0064] In this embodiment, the hopper 21 is made of stainless steel, and the welding positions inside the hopper 21 are polished to make the inner wall of the hopper 21 smooth, thereby preventing the electrode powder from sticking to the wall and clogging.

[0065] Optionally, the vibrator 22 may be a high-frequency vibrator such as a bin vibrator or a DC vibrator, in order to control the material dropping speed and force distribution, and improve the material dropping uniformity and speed.

[0066] Furthermore, the position of the scraper 30 relative to the conveying plane 101 is adjustable along a direction perpendicular to the conveying plane 101. This arrangement facilitates the adjustment of the thickness of the raw material, thereby allowing for the adjustment of the thickness of the formed film.

[0067] Specifically, the scraper 30 has fixed parts extending from both ends. The fixed parts are set on the baffle plate 113 of the fixed frame 11. The position between the fixed parts and the baffle plate 113 is adjustable along the direction perpendicular to the conveying plane 101.

[0068] Optionally, the fixing part and the baffle plate 113 are threadedly connected. The position between the fixing part and the baffle plate 113 can be adjusted by setting several shims. Alternatively, in other embodiments, the baffle plate 113 has a vertical part with an elongated hole extending perpendicular to the conveying plane 101. The baffle plate 113 is fixed in the elongated hole by a threaded fastening structure. Loosening the threaded fasteners allows for position adjustment of the fixing part within the elongated hole, thereby achieving position adjustment between the fixing part and the baffle plate 113.

[0069] Furthermore, the pre-compression roller mechanism 40 includes a mounting frame 41, a second drive member 42, and a pre-compression roller 43. The mounting frame 41 is mounted on the fixed frame 11; the second drive member 42 is mounted on the mounting frame 41; the pre-compression roller 43 is rotatably connected to the mounting frame 41 and located at the top of the conveying plane 101. The pre-compression roller 43 is connected to the output end of the second drive member 42, and can be driven by the second drive member 42 to rotate in order to pre-compress and form the raw material layer on the conveying plane 101. In use, the second drive member 42 is turned on, and the pre-compression roller 43 rotates, thereby realizing the pre-compression and forming of the raw material layer on the conveying plane 101.

[0070] The distance between the pre-compression roller 43 and the conveying plane 101 is less than the thickness of the raw material layer, so as to press the raw material layer. Of course, the actual distance between the pre-compression roller 43 and the conveying plane 101 can be adaptively set according to requirements, and is not specifically limited here.

[0071] Optionally, the pre-compression roller 43 pre-compresses the raw material layer in the opposite direction to the conveying direction of the conveying plane 101, so as to achieve the rolling pressure effect on the raw material layer through tangential force. Specifically, by setting the rotation direction of the pre-compression roller 43 to be opposite to the rotation direction of the drive wheel 12, the pre-compression roller 43 pre-compresses the raw material layer in the opposite direction to the conveying direction of the conveying plane 101. For example, the drive wheel 12 and the driven wheel 13 rotate clockwise, and the pre-compression roller 43 rotates counterclockwise.

[0072] For example, the preload roller 43 has a diameter of 200±0.5mm, a radial runout of ≤5μm, a straightness of ≤5μm, a roller surface hardness (HV) of ≥1200, and a tungsten carbide coating with a thickness of 200±10μm. This meets the requirements for the rolling hardness and flatness of the raw material layer.

[0073] Optionally, the position between the pre-pressing roller 43 and the conveying plane 101 is adjustable along a direction perpendicular to the conveying plane 101, so as to facilitate the adjustment of the distance between the pre-pressing roller 43 and the conveying plane 101, thereby making it suitable for roll forming of films of different thicknesses.

[0074] Optionally, the thickness of the diaphragm ranges from 1 mm to 3 mm, which is the commonly required diaphragm thickness.

[0075] Specifically, a number of shims are provided between the mounting frame 41 and the fixed frame 11, and the position between the pre-pressure roller 43 and the conveying plane 101 can be adjusted by the different numbers or thicknesses of the shims.

[0076] This embodiment also provides a battery manufacturing apparatus, which includes the dry electrode planar pre-pressing molding device described in any of the above embodiments. By employing this dry electrode planar pre-pressing molding device, the battery yield and production efficiency are improved.

[0077] Example 2

[0078] This embodiment provides a dry electrode plane pre-pressing forming device and a battery manufacturing equipment. The difference between this embodiment and Embodiment 1 is that the specific structure of the adjustable position between the scraper 30 and the conveying plane 101 along the direction perpendicular to the conveying plane 101 is different.

[0079] Specifically, the fixed parts at both ends of the leveling component 30 are rotatably connected to the baffle plate 113. By means of rotatable connection, not only can the position between the leveling component 30 and the conveying plane 101 be adjusted in the direction perpendicular to the conveying plane 101, but also the angle between the leveling component 30 and the conveying plane 101 can be adjusted, thereby adjusting the leveling force of the leveling component 30 on the material.

[0080] Optionally, in this embodiment, the end of the fixing part is provided with a threaded hole, and the adjusting bolt passes through the baffle plate 113 and is threadedly connected to the threaded hole. When the two are not threaded, the angle of the scraper 30 can be adjusted; after the adjustment is completed, the thread is tightened to fix the position of the scraper 30.

[0081] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A dry electrode planar preforming device, characterized by, include: Conveying mechanism (10) for conveying electrode powder; A feeding mechanism (20) is disposed on the conveying mechanism (10). The feeding mechanism (20) includes a feeding hopper (21) and a vibrator (22). The feeding port of the feeding hopper (21) is located at the top of the conveying plane (101) of the conveying mechanism (10). The feeding hopper (21) is used to supply the electrode powder to the conveying plane (101). The vibrator (22) is disposed on the feeding hopper (21). The vibrator (22) is used to provide vibration to the feeding hopper (21). A leveling component (30) is disposed on the conveying mechanism (10) and located downstream of the material dropping mechanism (20) along the conveying direction. The leveling component (30) is used to uniformly level the electrode powder on the conveying plane (101) to form a raw material layer. A pre-pressing roller mechanism (40) is disposed on the conveying mechanism (10) and located downstream of the scraper (30) along the conveying direction. The pre-pressing roller mechanism (40) is used to pre-press the raw material layer to form a film.

2. The dry electrode planar preforming device according to claim 1, wherein The conveying mechanism (10) includes: Fixed frame (11); The driving wheel (12) and the driven wheel (13) are spaced apart and rotatably connected to the fixed frame (11). One end of the driving wheel (12) is connected to a first driving member (14), which is used to drive the driving wheel (12) to rotate. The conveyor belt (15) is wound around the driving wheel (12) and the driven wheel (13) and is tensioned by the driving wheel (12) and the driven wheel (13).

3. The dry electrode planar preforming device according to claim 2, wherein The outer periphery of the drive wheel (12) is provided with a first annular groove, and the outer periphery of the driven wheel (13) is provided with a second annular groove. Along the circumference of the conveyor belt (15), the inner sidewall of the conveyor belt (15) is provided with annular protrusions that correspond one-to-one with the first annular groove and the second annular groove, so as to limit the movement of the conveyor belt (15).

4. The dry electrode planar preforming device according to claim 2, wherein Both sides of the fixed frame (11) are provided with baffle plates (113), which extend along the conveying direction and are used to prevent the electrode powder from overflowing.

5. The dry electrode planar preforming device of claim 1, wherein The material feeding mechanism (20) also includes a material feeding mounting plate (23), which is disposed on the conveying mechanism (10). The material feeding hopper (21) is fixed to the material feeding mounting plate (23), and the vibrator (22) is disposed on the material feeding mounting plate (23). The vibrator (22) is used to provide vibration to drive the material feeding mounting plate (23) and the material feeding hopper (21) to vibrate.

6. The dry electrode planar preforming device of claim 1, wherein The preload roller mechanism (40) includes: The mounting frame (41) is mounted on the conveying mechanism (10); The second driving component (42) is disposed on the mounting frame (41); A pre-pressing roller (43) is rotatably connected to the mounting frame (41) and located at the top of the conveying plane (101). The pre-pressing roller (43) is connected to the output end of the second drive member (42). The pre-pressing roller (43) can be driven by the second drive member (42) to rotate in order to pre-press the raw material layer of the conveying plane (101).

7. The dry electrode planar preforming device according to claim 6, wherein The pre-compression direction of the pre-compression roller (43) on the raw material layer is opposite to the conveying direction of the conveying plane (101).

8. The dry electrode planar preforming device according to claim 6, wherein The position between the preload roller (43) and the conveying plane (101) is adjustable along a direction perpendicular to the conveying plane (101).

9. The dry electrode planar preforming device of claim 1, wherein The position of the scraper (30) relative to the conveying plane (101) is adjustable along a direction perpendicular to the conveying plane (101).

10. A battery manufacturing apparatus, characterized by comprising: Includes the dry electrode planar pre-pressing forming apparatus as described in any one of claims 1-9.

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