Feeder of dry-method electrode film forming equipment and film forming equipment

Abstract

The utility model relates to the technical field of electrode film forming, and particularly discloses a feeder of a dry method electrode film forming device and a film forming device, the film forming device comprises the feeder and the film forming device, the feeder comprises a hopper, a rotor, a screen and a driving motor, the hopper is used for storing powder, the rotor is rotatably arranged at the bottom of the hopper, and the screen is arranged at the bottom of the hopper. The film forming device is located under the rotor, the screen is located between the rotor and the film forming device, at least one material groove is formed in the rotor, the material groove can rotate along with the rotor to switch the orientation of the material groove so that the material groove can face the hopper or the screen, when the material groove faces the hopper, powder in the hopper can fall into the material groove and rotate along with the material groove, and when the material groove faces the screen, the powder in the hopper can fall into the material groove. Due to the action of gravity, powder in the trough can automatically fall onto the screen, the powder with the overlarge diameter is screened through the screen, transportation of the powder is achieved, the discharging amount and the discharging speed can be controlled through the size of the trough and the rotating speed of the rotor, and then the feeding speed and the feeding amount are controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrode film forming, in particular to a feeder of dry method electrode film forming equipment and film forming equipment. BACKGROUND

[0002] Lithium ion batteries are widely used in modern society due to their high energy density, long service life, no memory effect, good safety performance and environmental protection characteristics. Dry electrode technology is an advanced method for manufacturing lithium ion battery electrodes. It does not require the use of solvents, thereby reducing production costs and reducing the impact on the environment. Dry electrode preparation generally includes dry powder mixing, binder fiberization, sieving / granulation, calendering film forming, and compounding.

[0003] In the above process, calendering film forming is one of the key steps, and the feeding process is particularly important. The quality of feeding directly affects the continuity, uniformity and overall quality of the final electrode film. Discontinuous or unstable feeding can cause problems such as film breakage or edge cracking. In the prior art, common feeding methods include manual feeding, screening feeding, and double screw extrusion feeding. Manual feeding has poor continuity and speed stability. Screening feeding is a boring screening and transmission through a screen, which has a low feeding rate and is not easy to accurately control the feeding amount. Double screw extrusion feeding can achieve high quality control accuracy, but for large width feeding requirements, the conveying method can easily cause material accumulation, resulting in uneven film thickness. SUMMARY

[0004] The utility model makes up for the previous problems, and the purpose of the utility model is to provide a feeder of dry method electrode film forming equipment and film forming equipment, which can provide continuous and quantitative powder process for the film former of the film forming equipment and ensure the forming quality of the dry method electrode film.

[0005] To achieve the above purpose, the utility model provides a feeder of dry method electrode film forming equipment, which comprises a hopper, a rotor and a screen.

[0006] The rotor is provided with at least one trough, which can be directed to the hopper or the screen.

[0007] According to the feeder of the dry method electrode film forming equipment described above, the rotor is in the form of a cylinder, a plurality of troughs arranged along the axial direction of the rotor form a trough group, and a plurality of trough groups are arranged on the outer surface of the rotor in the circumferential direction of the rotor.

[0008] The plurality of hoppers in the same hopper group are arranged on the rotor along the same line.

[0009] The plurality of hoppers in the same hopper group are arranged on the rotor along the same line.

[0010] The bottom of the hopper is provided with a first discharge port, the rotor is rotatably arranged in the first discharge port, and the side of the rotor can be attached to the inner wall of the first discharge port to seal the first discharge port.

[0011] The diameter of the rotor is consistent with the width of the first discharge port.

[0012] The bottom of the hopper is provided with a first discharge port, the rotor is rotatably arranged in the first discharge port, and the side of the rotor can be attached to the inner wall of the first discharge port to seal the first discharge port.

[0013] The bottom of the hopper is provided with a first discharge port, the rotor is rotatably arranged in the first discharge port, and the side of the rotor can be attached to the inner wall of the first discharge port to seal the first discharge port.

[0014] A dry-process electrode film forming device comprises:

[0015] The hopper, the rotor, the screen and the discharge funnel are arranged in the dry-process electrode film forming device.

[0016] The bottom of the hopper is provided with a first discharge port, the rotor is rotatably arranged in the first discharge port, and the side of the rotor can be attached to the inner wall of the first discharge port to seal the first discharge port.

[0017] The bottom of the hopper is provided with a first discharge port, the rotor is rotatably arranged in the first discharge port, and the side of the rotor can be attached to the inner wall of the first discharge port to seal the first discharge port.

[0018] The bottom of the hopper is provided with a first discharge port, the rotor is rotatably arranged in the first discharge port, and the side of the rotor can be attached to the inner wall of the first discharge port to seal the first discharge port. The utility model has the following beneficial effects: in the feeding process, the powder in the hopper can fall into the hopper of the rotor, and in the process of the rotation of the rotor, the hopper also rotates, when it is downward to the screen, the powder falls from the hopper to the screen, and the powder can be screened and discharged, the control of different feeding speeds can be realized through the control of the rotation speed of the rotor, and the ration of feeding can be realized in combination with the structure of the hopper. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the film-forming equipment in the embodiment;

[0020] Figure 2 This is a schematic diagram of the screen structure in an embodiment;

[0021] Figure 3 This is a schematic diagram of the rotor structure in Embodiment 1;

[0022] Figure 4 This is a schematic diagram of the rotor structure in Embodiment 2.

[0023] In the picture:

[0024] 1. Hopper; 2. Rotor; 3. Screen; 4. Feed trough; 5. Feeding funnel; 6. First roll; 7. Second roll. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] Example 1

[0027] like Figures 1-3 As shown, a dry electrode film forming device includes a feeder and a film forming device.

[0028] One of the feeders for a dry electrode film forming device includes a hopper 1, a rotor 2, a feeding funnel 5, a screen 3, and a drive motor, which is used to feed the film forming device of the film forming device.

[0029] The hopper 1 is used to store powder. The rotor 2 is rotatably mounted at the bottom of the hopper 1. The film-forming device is located directly below the rotor 2. The screen 3 is located between the rotor 2 and the film-forming device. At least one material trough 4 is provided on the rotor 2. The material trough 4 can rotate with the rotor 2 to switch the orientation of the material trough 4 to face the hopper 1 or the screen 3. When the material trough 4 faces the hopper 1, the powder in the hopper 1 can fall into the material trough 4. As the material trough 4 rotates, when the material trough 4 faces the screen 3, the powder in the material trough 4 will automatically fall onto the screen 3 due to gravity. The screen 3 is used to screen out powder with an excessively large diameter to achieve the transportation of the powder. The feeding amount and feeding speed can be controlled by the size of the material trough 4 and the rotation speed of the rotor 2, thereby controlling the feeding speed and feeding amount.

[0030] The structure and mesh size of screen 3 can be selected according to the requirements of the feeding rate.

[0031] Specifically, the first discharge port is arranged at the bottom of the hopper 1, and the diameter of the rotor 2 is consistent with the width of the first discharge port. The first discharge port is located at the bottom of the hopper 1 and is a rectangular outlet as a whole. The powder in the hopper 1 can be discharged through the first discharge port. The rotor 2 is rotatably arranged in the first discharge port, and the side of the rotor 2 can be attached to the inner wall of the first discharge port to seal the first discharge port. Thus, the powder can only be discharged through the trough 4 on the rotor 2 to avoid leakage and achieve precise control of the feeding amount and speed.

[0032] Specifically, the discharge hopper 5 is located below the hopper 1, and the discharge hopper 5 is provided with a feeding port matched with the first discharge port. The feeding port is located at the top of the discharge hopper 2. The feeding port is also rectangular, and the length and width thereof are consistent with the length and width of the first discharge port to ensure that no powder is leaked. The feeding port of the discharge hopper 5 is connected with the first discharge port of the hopper 1. The hopper 1 is first discharged through the rotor 2, then screened through the screen 3, and then falls into the feeding port of the discharge hopper 5 for further discharge.

[0033] Specifically, the rotor 2 is in a cylindrical shape. A plurality of troughs 4 arranged along the axial direction of the rotor 2 form a trough group. A plurality of trough groups are arranged on the outer surface of the rotor 2 along the circumferential direction of the rotor 2. The number and size of each trough 4 can determine the capacity of the powder. Since a plurality of trough groups are arranged on the outer surface of the rotor 2 along the circumferential direction of the rotor 2, the plurality of trough groups can be continuously driven to rotate synchronously when the rotor 2 rotates. Thus, part of the trough groups are in a feeding state, and part of the trough groups are in a discharging state. Therefore, the feeding efficiency can be improved.

[0034] In the present embodiment, each trough group is divided into a plurality of troughs 4. Alternatively, each trough group can be provided with one trough 4. This does not exceed the scope of the present embodiment.

[0035] In the present embodiment, the plurality of troughs 4 in the same trough group are arranged along the same line on the rotor 2 to ensure that the plurality of troughs 4 in the same trough group are discharged synchronously.

[0036] The film former includes a first roller 6 and a second roller 7. A forming channel is arranged between the first roller 6 and the second roller 7. The forming channel is essentially a long and narrow gap between the first roller 6 and the second roller 7. The powder falls along the long and narrow gap under the action of gravity. The discharge hopper 5 is provided with a second discharge port located directly above the forming channel. The width of the second discharge port is smaller than the width of the feeding port of the discharge hopper 5. The width of the second discharge port should be smaller than or equal to the width of the forming channel. Thus, the screened powder can fall into the forming channel and be extruded and formed by the first roller 6 and the second roller 7.

[0037] In the embodiment, in order to realize high-precision rotation of the rotor 2, a driving motor is further included, an output shaft of the driving motor is connected with the rotor 2 and can drive the rotor 2 to rotate, and the driving motor has high rotation precision, which is beneficial to guarantee the precision of the feeding.

[0038] Embodiment two

[0039] As shown in Figure 1 , 2 , 4, a dry electrode film forming device includes a feeder and a film former.

[0040] The feeder of the dry electrode film forming device includes a hopper 1, a rotor 2, a discharging funnel 5, a screen 3 and a driving motor, which is used to feed the film former of the film forming device.

[0041] The hopper 1 is used to store powder, the rotor 2 is rotatably arranged at the bottom of the hopper 1, the film former is located directly below the rotor 2, the screen 3 is located between the rotor 2 and the film former, at least one chute 4 is arranged on the rotor 2, the chute 4 can rotate with the rotor 2, the orientation of the chute 4 is switched to face the hopper 1 or the screen 3, when the chute 4 faces the hopper 1, the powder in the hopper 1 can fall into the chute 4, with the rotation of the chute 4, when the chute 4 faces the screen 3, the powder in the chute 4 will automatically fall onto the screen 3 due to gravity, the screen 3 is used to screen and transport the powder with a diameter larger than a certain value, the size of the chute 4 and the rotation speed of the rotor 2 can be used to control the discharging amount and the discharging speed, and then the feeding speed and the feeding amount can be controlled.

[0042] The structure and mesh number of the screen 3 can be selected according to the requirement of the feeding rate.

[0043] Specifically, a first discharge port is arranged at the bottom of the hopper 1, the diameter of the rotor 2 is consistent with the width of the first discharge port, the first discharge port is located at the bottom of the hopper 1 and has a rectangular shape, the powder in the hopper 1 can be discharged through the first discharge port, the rotor 2 is rotatably arranged in the first discharge port and the side of the rotor 2 can be attached to the inner wall of the first discharge port to seal the first discharge port, so that the powder can only be discharged through the chute 4 on the rotor 2 to avoid leakage of the powder and realize accurate control of the feeding amount and speed.

[0044] Specifically, the discharging funnel 5 is located below the hopper 1, and a feeding port matched with the first discharge port is arranged on the discharging funnel 5, the feeding port is located at the top of the discharging funnel 2, the feeding port also has a rectangular shape, the length and the width of the feeding port are consistent with the length and the width of the first discharge port, so that the powder cannot leak, the feeding port of the discharging funnel 5 is connected with the first discharge port on the hopper 1, the powder in the hopper 1 is first discharged through the rotor 2, then falls into the feeding port of the discharging funnel 5 after being screened by the screen 3, and then is discharged by the discharging funnel 5.

[0045] The film former comprises a first roller 6 and a second roller 7, and a forming channel is arranged between the first roller 6 and the second roller 7, which is essentially a long gap arranged between the first roller 6 and the second roller 7, and the powder material falls along the long gap under the action of gravity, the second discharge port is arranged on the discharging hopper 5 and is located directly above the forming channel, the width of the second discharge port is smaller than the width of the oil inlet of the discharging hopper 5, and the width of the second discharge port should be smaller than or equal to the width of the forming channel, so that the screened powder material can fall into the forming channel and be extruded and formed by the first roller 6 and the second roller 7.

[0046] Specifically, the rotor 2 is in a cylindrical shape, a plurality of material grooves 4 arranged in the axial direction of the rotor 2 form a material groove group, and a plurality of material groove groups are arranged on the outer surface of the rotor 2 in the circumferential direction of the rotor 2, the number and size of each material groove 4 can determine the capacity of the powder material, and since a plurality of material groove groups are arranged on the outer surface of the rotor 2 in the circumferential direction of the rotor 2, the plurality of material groove groups can be continuously driven to rotate synchronously when the rotor 2 rotates, so that part of the material groove groups are in a material receiving state and part of the material groove groups are in a material discharging state, thereby improving the feeding efficiency.

[0047] In the embodiment, the plurality of material grooves 4 in the same material groove group are arranged on the rotor 2 in a diagonal direction, which can ensure the uniformity of the material discharging of the material grooves 4.

[0048] Therefore, it can be seen that the arrangement of the material grooves 4 can be various and is not limited to the two kinds mentioned in the application.

[0049] The technical scheme of the utility model is described in detail above in combination with the drawings, and the described embodiments are used to help understand the idea of the utility model. The specific embodiments described in the text are only examples of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the scope defined by the appended claims.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0051] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0052] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

Claims

1. A feeder for a dry electrode film forming apparatus, characterized by, The feeder comprises a hopper, a rotor rotatably arranged at the bottom of the hopper, and a screen located directly below the rotor. The rotor is provided with at least one trough, which can be directed towards the hopper or the screen.

2. A feeder for a dry-process electrode film forming apparatus according to claim 1, wherein The rotor is in the shape of a cylinder, and a plurality of troughs arranged axially on the rotor form a trough group, and a plurality of trough groups are arranged on the outer surface of the rotor in a circumferential direction.

3. A feeder for a dry-process electrode film forming apparatus according to claim 2, wherein The plurality of troughs in the same trough group are arranged on the rotor along the same line.

4. A feeder for a dry-process electrode film forming apparatus according to claim 2, wherein The plurality of troughs in the same trough group are arranged on the rotor in a diagonal direction.

5. A feeder for a dry-process electrode film forming apparatus according to claim 1, wherein The bottom of the hopper is provided with a first discharge port, the rotor is rotatably arranged in the first discharge port, and the side of the rotor can be attached to the inner wall of the first discharge port to seal the first discharge port.

6. A feeder for a dry-process electrode film forming apparatus according to claim 5, wherein The diameter of the rotor is consistent with the width of the first discharge port.

7. A feeder for a dry-process electrode film forming apparatus according to claim 5, wherein Further comprising a discharging funnel, which is located below the hopper and is provided with a feeding port matched with the first discharge port, and the feeding port of the discharging funnel is connected with the first discharge port of the hopper.

8. A feeder for a dry-process electrode film forming apparatus according to claim 1, wherein Further comprising a driving motor, the output shaft of which is connected with the rotor.

9. A dry electrode film forming apparatus characterized by, The feeder comprises a hopper, a rotor, a screen, and a discharging funnel, the rotor is rotatably arranged at the bottom of the hopper, the screen is located directly below the rotor, the top of the discharging funnel is attached to the bottom of the hopper, the rotor is provided with at least one trough, which can be directed towards the hopper or the screen. The film former is located directly below the discharging funnel. The film former comprises a first roller and a second roller, and a forming channel is arranged between the first roller and the second roller, the discharging funnel is provided with a second discharge port, which is located directly above the forming channel.

10. A dry-process electrode film forming apparatus according to claim 9, wherein ​

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