Powder and burr collecting device

Abstract

The utility model discloses a powder and burr collecting device, and relates to the technical field of battery manufacturing. The powder and burr collecting device comprises a material collecting assembly, an exhaust fan and a material storage assembly, the material collecting assembly comprises a workbench, a material collecting box and a material suction pipe, a material falling area is arranged at the top of the workbench, the material collecting box is arranged around the material falling area, the side, facing the material falling area, of the material collecting box is open, the material collecting box communicates with an air inlet of the exhaust fan through the material suction pipe, and the material storage assembly is arranged on the workbench. An air outlet of the exhaust fan communicates with the material storage assembly. The powder and burr collecting device provided by the embodiment of the utility model is used for being mounted below the lamination machine and collecting powder and burrs falling in a lamination process in real time, so that foreign matters are effectively prevented from entering a battery cell, and the safety of a battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a powder and burr collecting device. Background Art

[0002] With the rapid development of new energy technologies, sodium-ion batteries (Na-ion batteries) have gradually become an important component of energy storage technology due to their abundant resources and low cost. In the manufacturing process of Na-ion batteries, the lamination process is a key step, and its quality directly affects the performance and safety of the battery.

[0003] However, during the stacking process, powder and burrs may fall from the positive or negative electrode sheets. Once these foreign objects enter the battery cell, they will cause the battery to discharge, affecting its charge retention ability. They may even puncture the separator and cause the battery cell to short-circuit, posing a safety hazard. In addition, the air blowing during the stacking and the suction and vibration of the mechanical grippers can easily cause powder and burrs to be scattered inside the equipment, further increasing the risk of foreign objects entering the battery cell.

[0004] To address the above problems, the existing technology has adopted a variety of measures, including improving lamination equipment and processes, optimizing the electrode material formula, and improving the quality of diaphragms. However, these measures are often difficult to completely avoid the generation of powder and burrs, and may introduce new technical difficulties. Utility Model Content

[0005] The purpose of this application is to provide a powder and burr collection device to solve the problem that powder and burrs dropped during the stacking process enter the battery cell and affect the battery performance and safety.

[0006] The technical solution adopted by this application to solve its technical problems is:

[0007] A powder and burr collection device includes a material receiving assembly, an exhaust fan and a material storage assembly. The material receiving assembly includes a workbench, a material receiving box and a suction pipe. A material dropping area is provided on the top of the workbench. The material receiving box is arranged around the material dropping area and is open on one side facing the material dropping area. The material receiving box is connected to the air inlet of the exhaust fan through the suction pipe, and the air outlet of the exhaust fan is connected to the material storage assembly.

[0008] Furthermore, at least two material receiving boxes are arranged around the material dropping area.

[0009] Furthermore, the material receiving box is connected to the workbench through a fixed column.

[0010] Furthermore, the material receiving components include at least two.

[0011] Furthermore, a vertically arranged discharge pipe is provided above the material storage assembly, the upper end of the discharge pipe is connected to the air outlet of the exhaust fan, and the lower end of the discharge pipe is connected to the material storage assembly.

[0012] Furthermore, a discharge valve is provided on the discharge pipe.

[0013] Furthermore, the material storage assembly includes a material storage box, and the lower end of the discharge pipe is connected to the top of the material storage box.

[0014] Furthermore, the material storage assembly also includes a powder box, the powder box is connected to the material storage box, and a filter is provided at the communication position between the two, and an air supply valve is provided on the material storage box.

[0015] Furthermore, a first electronic scale which also serves as the box bottom is provided at the bottom of the storage box, and a second electronic scale which also serves as the box bottom is provided at the bottom of the powder box.

[0016] Furthermore, the exhaust fan includes a centrifugal blower.

[0017] Beneficial effects of this application:

[0018] The powder and burr collection device provided in the embodiment of the present application is used to be installed under the stacking machine to collect powder and burrs dropped during the stacking process in real time, thereby effectively preventing foreign matter from entering the battery cell and improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 Schematic diagram of the structure of the powder and burr collection device provided in an embodiment of the present application;

[0021] Figure 2 It is a structural diagram of the receiving component;

[0022] Figure 3 It is a structural diagram of the storage component.

[0023] Reference numerals:

[0024] 1- Material receiving assembly;

[0025] 11- Workbench;

[0026] 111- blanking area;

[0027] 12- material receiving box;

[0028] 13-suction pipe;

[0029] 14-fixed column;

[0030] 2-Exhaust fan;

[0031] 3-Storage component;

[0032] 31- storage box;

[0033] 32-powder box;

[0034] 33- filter;

[0035] 34-air supply valve;

[0036] 35-First electronic scale;

[0037] 36- second electronic scale;

[0038] 4-discharge pipe;

[0039] 5-discharge valve;

[0040] 6-Feed pipe. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0042] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In addition, the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0043] In the description of the embodiments of the present application, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. The terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, and an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0044] See also Figure 1 、 Figure 2A powder and burr collection device provided in an embodiment of the present application includes a material receiving component 1, an exhaust fan 2 and a material storage component 3. The material receiving component 1 includes a workbench 11, a material receiving box 12 and a suction pipe 13. A material dropping area 111 is provided on the top of the workbench 11. The material receiving box 12 is arranged around the material dropping area 111 and is open on one side facing the material dropping area 111. The material receiving box 12 is connected to the air inlet of the exhaust fan 2 through the suction pipe 13, and the air outlet of the exhaust fan 2 is connected to the material storage component 3.

[0045] See also Figure 1 The collecting assembly 1 is installed below the laminating machine to collect the powder and burrs dropped during the laminating process; the exhaust fan 2 is used to provide conveying power to transport the powder and burrs collected in the collecting assembly 1 to the storage assembly 3 through a pipeline for storage. Exemplarily, the exhaust fan 2 may include a centrifugal blower. The centrifugal blower may be operated at a high speed, thereby providing a higher pressure and flow rate with less energy consumption, thereby improving the collection efficiency and effect of the powder and burrs. Of course, the exhaust fan 2 may also adopt other existing structures, which are not specifically limited here.

[0046] See also Figure 1 、 Figure 2 The material collecting assembly 1 mainly includes a workbench 11, a material collecting box 12 and a material suction pipe 13; the workbench 11 is a horizontally arranged flat plate structure, which is used to be installed under the stacking machine through fasteners such as bolts; the upper surface of the workbench 11 has a blanking area 111, which is used to collect powder and burrs dropped during the stacking process; the material collecting box 12 is installed above the workbench 11 and is located around the blanking area 111. The material collecting box 12 is open to one side of the blanking area 111 to form a material collecting port, one end of the material suction pipe 13 is connected to the material collecting box 12, and the other end of the material suction pipe 13 passes downward through the workbench 11 and is connected to the air inlet of the exhaust fan 2, and the air outlet of the exhaust fan 2 is connected to the material storage assembly 3.

[0047] The powder and burr collection device provided in the embodiment of the present application is used to be installed under the stacking machine to collect the powder and burrs dropped during the stacking process in real time; the specific working principle is: start the exhaust fan 2, and the blades in the exhaust fan 2 rotate to drive the air to flow in the pipeline from the material receiving component 1 to the material storage component 3, thereby forming a pressure difference at the open part of the material receiving box 12, so that the air in the blanking area 111 continuously flows into the material receiving box 12; when the powder and burrs dropped during the stacking process move downward and approach the material receiving box 12, the powder and burrs are sucked into the material receiving box 12 by the air, and the powder and burrs are then stored in the material storage component 3 after being transported by the suction pipe 13 and the exhaust fan 2.

[0048] The powder and burr collection device provided in the embodiment of the present application uses the exhaust fan 2 to form negative pressure at the open part of the material receiving box 12, thereby quickly sucking away the powder and burrs falling downward from directly above the material dropping area 111, thereby preventing the powder and burrs from spreading or splashing in the material dropping area 111; compared with the existing technology, it can timely collect the powder and burrs that fall during the stacking process, effectively preventing foreign matter such as powder and burrs from entering the battery cell, and improving the safety of the battery.

[0049] In some embodiments, see Figure 2 At least two material receiving boxes 12 are provided around the material drop zone 111. By providing at least two material receiving boxes 12, powder and burrs can be collected simultaneously, thereby improving the efficiency of material collection. For example, two material receiving boxes 12 are provided, and the two material receiving boxes 12 are relatively provided on both sides of the material drop zone 111.

[0050] In some embodiments, see Figure 2 The material receiving box 12 is connected to the workbench 11 through fixed columns 14. For example, four fixed columns 14 are fixed around the blanking area 111. The four fixed columns 14 are arranged in a square or rectangular shape. One material receiving box 12 is connected to two fixed columns 14 located on one side of the blanking area 111, and the other material receiving box 12 is connected to two fixed columns 14 located on the other side of the blanking area 111.

[0051] The receiving assembly 1 can be one. In some embodiments, see Figure 1 The collecting assembly 1 includes at least two. By providing at least two collecting assemblies 1, the powder and burrs dropped from at least two areas can be collected at the same time, thereby improving the efficiency of collecting the dropped materials.

[0052] In some embodiments, see Figure 1 The air inlet of the exhaust fan 2 is connected to one end of the feed pipe 6, and the other end of the feed pipe 6 is connected to all the suction pipes 13. The feed pipe 6 can be formed by bending a straight pipe or splicing a straight pipe and an elbow. Figure 1 、 Figure 3 A discharge pipe 4 is vertically arranged above the storage component 3. The upper end of the discharge pipe 4 is connected to the air outlet of the exhaust fan 2, and the lower end of the discharge pipe 4 is connected to the storage component 3. A discharge valve 5 is provided on the discharge pipe 4; wherein the discharge valve 5 is used to control the on and off of the discharge pipe 4.

[0053] In some embodiments, see Figure 3 The storage assembly 3 may include a storage box 31, with the lower end of the discharge pipe 4 communicating with the top of the storage box 31. The cross-section of the inner cavity of the storage box 31 gradually decreases from top to bottom. During the lamination process, the discharge valve 5 is opened and the exhaust fan 2 is activated to store the powder and burrs in the storage box 31.

[0054] In some embodiments, see Figure 3 The material storage assembly 3 may further include a powder box 32, which is connected to the material storage box 31 and is provided with a filter 33 at the connection position between the two. The material storage box 31 is provided with an air supply valve 34. The filter 33 is used to filter powder and burrs. The mesh size of the filter 33 allows powder with smaller particle size to pass through, but prevents burrs with larger particle size from passing through. During the lamination process, the collected powder and burrs are stored in the storage box 31; after the lamination is completed, the discharge valve 5 is closed, the air outlet of the blower is connected to the air supply valve 34, the air supply valve 34 is opened, and the blower is used to supply air to the inner cavity of the storage box 31, and the powder and burrs in the inner cavity of the storage box 31 are blown up, so that the powder and burrs flow in the inner cavity of the storage box 31. In this process, powder with smaller particle size passes through the filter 33 and enters the powder box 32. After the air is supplied for a sufficient time, the blower and the air supply valve 34 are closed. At this time, the burrs with larger particle size are stored in the storage box 31, and the powder with smaller particle size is stored in the powder box 32, thereby achieving the separation of powder and burrs.

[0055] In some embodiments, see Figure 3 A first electronic scale 35, also serving as the bottom of the storage box 31, is provided at the bottom of the powder box 32. A second electronic scale 36, also serving as the bottom of the powder box 32, is provided at the bottom of the powder box 32. After lamination is completed, the first electronic scale 35 displays the total weight m0 of the collected powder and burrs. After the powder and burrs are separated, the first electronic scale 35 displays the weight m1 of the burrs, while the second electronic scale 36 displays the weight m2 of the powder, facilitating the statistical analysis of the amount of powder and burrs dropped from each batch of electrodes.

[0056] Due to differences in materials and formulations used in battery cell production in the laboratory or pilot line, the amount of powder and burrs released during the lamination process can also vary. Therefore, collecting and weighing these powders and burrs during the lamination process can aid in identifying process anomalies and analyzing battery cell performance. After the powders and burrs are separated and weighed, if the difference between m0 and (m1 + m2) exceeds the allowable error (configurable in the system), this indicates that filter 33 is clogged, alerting maintenance personnel to the need to replace or clean filter 33.

[0057] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Based on the technical essence of the present application and within the spirit and principles of the present application, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present application.

Claims

1. A powder and burr collecting device, characterized in that: The invention comprises a material receiving assembly (1), an exhaust fan (2) and a material storage assembly (3); the material receiving assembly (1) comprises a workbench (11), a material receiving box (12) and a material suction pipe (13); a material drop area (111) is provided on the top of the workbench (11); the material receiving box (12) is arranged around the material drop area (111) and is open on one side facing the material drop area (111); the material receiving box (12) is connected to the air inlet of the exhaust fan (2) through the material suction pipe (13); and the air outlet of the exhaust fan (2) is connected to the material storage assembly (3).

2. The powder and burr collecting device according to claim 1, characterized in that: At least two material receiving boxes (12) are arranged around the material dropping area (111).

3. The powder and burr collecting device according to claim 1, characterized in that: The material receiving box (12) is connected to the workbench (11) via a fixing column (14).

4. The powder and burr collecting device according to claim 1, 2 or 3, characterized in that: The material receiving components (1) include at least two.

5. The powder and burr collecting device according to claim 1, characterized in that: A discharge pipe (4) is vertically arranged above the material storage assembly (3), the upper end of the discharge pipe (4) is connected to the air outlet of the exhaust fan (2), and the lower end of the discharge pipe (4) is connected to the material storage assembly (3).

6. The powder and burr collecting device according to claim 5, characterized in that: The discharge pipe (4) is provided with a discharge valve (5).

7. The powder and burr collecting device according to claim 6, characterized in that: The material storage assembly (3) comprises a material storage box (31), and the lower end of the discharge pipe (4) is communicated with the top of the material storage box (31).

8. The powder and burr collecting device according to claim 7, characterized in that: The material storage assembly (3) further comprises a powder box (32), the powder box (32) is in communication with the material storage box (31), a filter screen (33) is provided at the communication position between the two, and an air supply valve (34) is provided on the material storage box (31).

9. The powder and burr collecting device according to claim 8, characterized in that: The bottom of the material storage box (31) is provided with a first electronic scale (35) which also serves as the box bottom, and the bottom of the powder material box (32) is provided with a second electronic scale (36) which also serves as the box bottom.

10. The powder and burr collecting device according to claim 1, characterized in that: The exhaust fan (2) comprises a centrifugal blower.

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