Electrode sheet compacting device

Abstract

The utility model discloses a kind of electrode sheet compaction devices of solid-state battery electrode sheet preparation technical field, to solve the problem that compaction machine is prone to exist in prior art Hole leading to roll product cannot be fully utilized. It includes screw conveyor and roller pressing device, the screw conveyor top is equipped with feed slot, the discharge end of the screw conveyor is equipped with storage tank, the bottom end position of the storage tank is equipped with discharge flat mouth, the discharge flat mouth points to the position between the two compression rollers of roller pressing device, the position above the storage tank is provided with suction pipe, the roller pressing device is equipped with first shutdown device, the inside of the storage tank is equipped with second shutdown device. The utility model is used for the preparation work of electrode sheet in solid-state battery, utilizes the preparation of compaction device to roll simultaneously, can effectively reduce the hole in raw material, is conducive to guarantee the compactness degree of material when supplying, reduce the generation of defective in roll finished product.

Description

Technical Field

[0001] This utility model relates to an electrode sheet compaction device, belonging to the field of solid-state battery electrode sheet preparation technology. Background Technology

[0002] The double-roll compactor (also known as a dry electrode roller compactor) is a key piece of equipment with great potential and application prospects in the next generation of dry electrode processes. Compared with the wet coating process, it does not require the use of adhesives and can directly mix the required electrode materials (such as solid electrolyte powder, motor active materials, conductive agents, and fibrous adhesives such as Teflon) for roller pressing. Although this method is simpler than the coating process, in actual use, the scattered and chaotic state of the powdered materials before being conveyed into the roller compactor makes it easy for voids to be generated between the materials. These voids affect the actual molding effect and easily lead to defects and cavities of different shapes in the finished product, resulting in a large area that cannot be used normally and seriously affecting production efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electrode sheet compaction device for the preparation of electrode sheets in solid-state batteries. By using a roller compaction device for preparation, voids in the raw materials can be effectively reduced, which helps to ensure the compactness of the materials during supply, reduce the generation of defects, and thus improve the utilization rate of the finished products and increase production efficiency.

[0004] To achieve the above objectives, this utility model employs the following technical solution: This utility model provides an electrode sheet compaction device, including a screw conveyor and a roller pressing device. The screw conveyor is provided with a feeding trough above it, and a storage box is installed at the discharge end of the screw conveyor. The bottom of the storage box is provided with a discharge flat opening, which points between the two pressing rollers of the roller pressing device. An air extraction pipe is provided above the storage box. The roller pressing device is provided with a first shut-off device, and the storage box is provided with a second shut-off device. The first shut-off device is configured to close the discharge port of the discharge flat opening, and the second shut-off device is configured to close the feeding port of the storage box.

[0005] Specifically, the first shut-off device includes a slide cylinder fixedly installed on the roller pressing device, and the output end of the slide cylinder is equipped with a first shut-off plate that can be inserted and sealed at the discharge end of the discharge flat opening. The second shut-off device includes a drive cylinder fixedly installed on the storage box, and the inside of the storage box is also slidably provided with a second shut-off plate that can seal the inlet of the storage box. The drive cylinder is used to drive the second shut-off plate to be in an open or closed state.

[0006] Specifically, the inlet of the storage box is provided with a grating plate, and the second shut-off plate has multiple adjacent grating slots, with the shortest distance between two adjacent grating slots being greater than the width of the opening on the grating plate.

[0007] Specifically, a spray pipe is provided above the storage tank, which communicates with the inside of the storage tank, and a nozzle is installed at the liquid outlet end of the spray pipe.

[0008] Specifically, an air supply pipe is also connected to the top of the storage box.

[0009] Specifically, a transparent window is provided on one side of the storage bin, and a photosensitive sensor is provided on one side inside the storage bin, with the photosensitive surface of the photosensitive sensor pointing directly downwards.

[0010] Specifically, a U-shaped cover for protecting the photosensitive sensor is installed on one side inside the storage box. The opening of the U-shaped cover faces downward and the bottom surfaces on both sides of the U-shaped cover are lower than the bottom surface of the photosensitive sensor.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This invention features a storage bin at the front end of the compactor. By incorporating a shut-off structure and an extraction pipe on the storage bin, the material entering the bin is vacuumed to expel air from its cavities, resulting in a tighter connection between materials. Intermittent feeding and extraction ensure the compacted material is expelled from the discharge port through compression, guaranteeing a fuller supply and improving the compaction effect. This prevents large voids in the compacted product, thereby increasing product utilization and ensuring production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the electrode sheet compaction device provided in this embodiment of the utility model; Figure 2 This is a utility model Figure 1 Enlarged view of section A of the electrode sheet compaction device provided in the embodiment; Figure 3 This is a rear view of the electrode sheet compaction device provided in this embodiment of the utility model; Figure 4 This is a utility model Figure 3 A cross-sectional view of the electrode sheet compaction device provided in the embodiment along the BB direction; Figure 5 This is a side view of the electrode sheet compaction device provided in this embodiment of the utility model; Figure 6 This is a utility model Figure 5 A cross-sectional view of the electrode sheet compaction device provided in the embodiment, along the CC direction; Reference numerals: 1. Screw conveyor; 2. Roller pressing device; 3. Feed trough; 4. Storage bin; 5. Air extraction pipe; 6. Slide cylinder; 7. First shut-off plate; 8. Nozzle; 9. Air supply pipe; 10. Drive cylinder; 11. Second shut-off plate; 12. Photosensitive sensor; 13. U-shaped material cover. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0014] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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. Example:

[0016] This utility model provides an electrode sheet compaction device for the preparation of electrode sheets in solid-state batteries. Utilizing a roller compaction device, it effectively reduces voids in the raw materials, ensuring material compactness during supply, reducing defects, and thus improving the utilization rate of the rolled product and increasing production efficiency. To achieve the device's structural function, it includes a screw conveyor 1 and a roller compaction device 2. The screw conveyor 1 transports powdered materials, while the roller compaction device 2 includes two opposing rollers that compress the material between the rollers into a thin sheet. A feed trough 3 is located above the screw conveyor 1 for mechanical or manual material addition. To ensure smooth material flow, a storage box 4 is installed at the discharge end of the screw conveyor 1. The storage box 4 has a discharge port at its bottom, positioned between the two rollers of the roller compaction device 2, controlling the material's shape distribution during discharge to facilitate compaction by the rollers. This reduces voids between materials and ensures a high degree of compaction. An air extraction pipe 5 is installed above the storage tank 4. A first shut-off device is installed on the roller pressing device 2, and a second shut-off device is installed inside the storage tank 4. The first shut-off device is configured to close the discharge port of the flat discharge outlet, and the second shut-off device is configured to close the inlet of the storage tank 4. The specific structural design of the first and second shut-off devices is not limited here, as long as they achieve their corresponding functions. During operation, the screw conveyor 1 supplies a certain amount of material into the storage tank 4 (ensuring the first shut-off device is in operation). (In the closed state), after a certain amount of material is conveyed, the second shut-off device shuts off the feed inlet, and the air extraction pipe 5 extracts air to allow the gas at the cavity locations to flow out, thus ensuring the compactness of the material. Then the second shut-off device opens and continues to supply material, repeating the above actions until the material becomes blocked. When this happens, the first shut-off device is opened, and the pushing force generated by the screw conveyor 1 is used to squeeze the material out from the discharge flat opening. Compared with the material without the air extraction action, the material squeezed out in this way can effectively reduce the volume and number of cavities, which is beneficial to ensuring the final molding effect.

[0017] This utility model provides an electrode sheet compaction device, specifically offering a configuration of a first shut-off device and a second shut-off device. Specifically, the first shut-off device includes a slide cylinder 6 fixedly mounted on the roller pressing device 2. (Refer to...) Figure 2 as well as Figure 4As shown, the output end of the sliding cylinder 6 is equipped with a first shut-off plate 7 that can be inserted and sealed at the discharge end of the flat discharge port. The opening and closing of the discharge port is achieved by the lifting and lowering of the first shut-off plate 7. The second shut-off device works similarly. Specifically, the second shut-off device can be configured to include a drive cylinder 10 fixedly installed on the storage box 4, and a second shut-off plate 11 that can seal the inlet of the storage box 4 is also slidably arranged inside the storage box 4. The drive cylinder 10 is configured to drive the second shut-off plate 11 to be in the open or closed state. In some preferred embodiments, it is preferable to configure a grid plate at the inlet position of the storage box 4, referring to... Figure 6 As shown, the second shut-off plate 11 is configured with multiple adjacent grid slots, and the shortest distance between two adjacent grid slots is greater than the width of the opening on the grid plate. With this configuration, the braking distance required for the drive cylinder 10 to operate can be effectively shortened, and there is no need to move the second shut-off plate 11 significantly. It is only necessary to stagger its grid slots. This can effectively achieve short-distance movement when the storage box 4 is small and the opening of the screw conveyor 1 is large.

[0018] This utility model provides an electrode sheet compaction device. Considering that some processes may require the doping of powdered materials, such as adding adhesives or conductive agents, a spray pipe 8 communicating with the interior of the storage tank 4 can be provided above the storage tank 4. A nozzle is installed at the liquid outlet of the spray pipe 8. It is understood that the spray pipe 8 should be specified according to the type and quantity of liquid required for actual use, and should not be limited to one type. It can be used to spray adhesives, and is not limited to spraying conductive agents, etc. The viscous or blocky materials formed by bonding are also more conducive to the vacuum effect to ensure the compactness of the materials. In some other embodiments, a stirring mechanism can also be configured inside the storage tank 4, and an additional powder inlet (which should be sealed) can be added above it to achieve mixing of different substances.

[0019] The electrode sheet compaction device provided in this utility model embodiment has the following features: In some embodiments, if it is felt that the material needs to be kept in a piled state when the screw conveyor 1 needs to push the material, which would be detrimental to other operations, an air supply pipe 9 can also be connected above the storage tank 4. When the material is vacuumed and piled up at the discharge flat opening, the material can be pushed out of the discharge flat opening in an orderly manner by supplying air pressure. At this time, the second shut-off plate 11 is in the closed state and the first shut-off plate 7 is in the open state, making the pushing action easier to control. The discharge speed can be changed by controlling the air pressure in the storage tank 4. For monitoring the air pressure, a corresponding pressure sensor can be installed on the storage tank 4.

[0020] In some embodiments of the electrode sheet compaction device provided by this utility model, to detect whether there is enough material in the storage tank 4 to avoid insufficient supply, a transparent window can be provided on one side of the storage tank 4. A light source, such as an incandescent lamp or natural light, is supplied at the transparent window. A photosensitive sensor 12 is provided on one side inside the storage tank 4. If material accumulates, the photosensitive sensor 12 cannot detect the light source, which means that the material is full. To prevent material from accumulating on the photosensitive surface, the photosensitive surface of the photosensitive sensor 12 can be configured to point directly downwards. In some preferred embodiments, considering that material may adhere to the photosensitive side, a U-shaped material cover 13 for protecting the photosensitive sensor 12 can also be installed on one side inside the storage tank 4. In this case, the opening of the U-shaped material cover 13 faces downwards, and the bottom surfaces on both sides of the U-shaped material cover 13 are lower than the bottom surface of the photosensitive sensor 12, which can prevent material from directly adhering to the photosensitive surface.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electrode sheet compaction device, characterized in that, The device includes a screw conveyor (1) and a roller pressing device (2). The screw conveyor (1) is provided with a feed trough (3) above it. A storage box (4) is installed at the discharge end of the screw conveyor (1). A discharge flat opening is provided at the bottom of the storage box (4). The discharge flat opening points to the position between the two pressure rollers of the roller pressing device (2). An air extraction pipe (5) is provided above the storage box (4). A first shut-off device is provided on the roller pressing device (2). A second shut-off device is provided inside the storage box (4). The first shut-off device is configured to close the discharge port of the discharge flat opening. The second shut-off device is configured to close the feed port of the storage box (4).

2. The electrode sheet compaction device according to claim 1, characterized in that, The first shut-off device includes a slide cylinder (6) fixedly installed on the roller pressing device (2). The output end of the slide cylinder (6) is equipped with a first shut-off plate (7) that can be inserted and sealed at the discharge end of the discharge flat opening. The second shut-off device includes a drive cylinder (10) fixedly installed on the storage box (4). The inside of the storage box (4) is also slidably provided with a second shut-off plate (11) that can seal the inlet of the storage box (4). The drive cylinder (10) is used to drive the second shut-off plate (11) to be in an open or closed state.

3. The electrode sheet compaction device according to claim 2, characterized in that, The inlet of the storage box (4) is provided with a grating plate, and the second shut-off plate (11) has multiple adjacent grating slots. The shortest distance between two adjacent grating slots is greater than the width of the opening on the grating plate.

4. The electrode sheet compaction device according to claim 1, characterized in that, A spray pipe (8) is provided above the storage tank (4) and communicates with the inside of the storage tank (4). A nozzle is installed at the liquid outlet end of the spray pipe (8).

5. The electrode sheet compaction device according to claim 1, characterized in that, An air supply pipe (9) is also connected above the storage box (4).

6. The electrode sheet compaction device according to claim 1, characterized in that, A transparent window is provided on one side of the storage box (4), and a photosensitive sensor (12) is provided on one side inside the storage box (4), with the photosensitive surface of the photosensitive sensor (12) pointing directly downwards.

7. The electrode sheet compaction device according to claim 6, characterized in that, A U-shaped cover (13) for protecting the photosensitive sensor (12) is installed on one side inside the storage box (4). The opening of the U-shaped cover (13) faces downward and the bottom surfaces on both sides of the U-shaped cover (13) are lower than the bottom surface of the photosensitive sensor (12).

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