Device for removing dust in cylindrical lithium ion battery steel shell

Abstract

The utility model discloses a device for removing dust in a steel shell of a cylindrical lithium ion battery, which comprises a cylindrical air blowing pipeline and a circular vacuum pipeline, the air blowing pipeline is externally connected with a compressed air source, the vacuum pipeline is externally connected with a vacuumizing device, and the air blowing pipeline extends into the steel shell after being nested between the vacuum pipelines. The air blowing pipeline and the vacuum pipeline are arranged, high-pressure airflow flows into the steel shell to scour the interior of the steel shell, floating powder nickel scraps are taken away, and compared with traditional brush cleaning, the air blowing pipeline and the vacuum pipeline are arranged, the air blowing pipeline and the vacuum pipeline are arranged, so that the cleaning efficiency is greatly improved, and the cleaning cost is reduced. And the efficiency is high, secondary pollution is avoided, and the cleaning efficiency and the cleaning effect of the interior of the steel shell are greatly improved.

Description

Technical Field

[0001] This utility model is designed for the field of battery production and assembly, and in particular, it designs a device for dust removal inside the steel casing of cylindrical lithium-ion batteries. Background Technology

[0002] The production process of cylindrical lithium-ion batteries involves the manufacturing and processing of the battery casing. Cylindrical lithium-ion batteries use nickel-plated steel casings. The adhesion of the plating layer inside the casing is weaker than that on the outside, resulting in nickel dust adhering to the surface of the casing plating. This nickel dust cannot be completely removed during steel casing cleaning. During cell assembly, this nickel dust may fall into the electrode layers of the cell, causing a potential micro-short circuit and affecting the quality of the lithium battery.

[0003] To address this issue, the traditional approach is to use a brush for cleaning. However, the brush bristles easily pick up and accumulate nickel shavings during the process, which can cause secondary pollution. Furthermore, the process cannot be automated and requires a large amount of manpower, reducing overall production efficiency.

[0004] Therefore, this application proposes a solution to the above problems. Summary of the Invention

[0005] Purpose of the utility model: The purpose of this utility model is to provide a device for dust removal inside the steel shell of cylindrical lithium-ion batteries, which can clean the floating powder and nickel shavings on the inner wall of the cylindrical lithium-ion battery shell and improve the production efficiency of cylindrical lithium-ion batteries.

[0006] Technical solution: The present invention provides a device for dust removal inside the steel shell of a cylindrical lithium-ion battery, comprising a cylindrical air blowing pipe and a circular vacuum pipe. The air blowing pipe is externally connected to a compressed air source, and the vacuum pipe is externally connected to a vacuum pumping device. The air blowing pipe is nested between the vacuum pipes and extends into the steel shell. The outer wall of the air blowing pipe is provided with small air outlet holes, and the lower edge of the vacuum pipe is connected to the top opening of the steel shell.

[0007] High-pressure air is blown into the steel shell through the air blowing pipe, and then the gas inside the steel shell is extracted through vacuum management, realizing the circulation of high-pressure airflow inside the steel shell. The high-pressure airflow carries away the floating nickel powder inside the steel shell.

[0008] Preferably, the air outlet holes are evenly distributed on the outer walls of both sides of the air blowing pipe and on the outer wall of the bottom of the air blowing pipe. The angle between the air outlet holes on the outer walls of both sides of the air blowing pipe and the horizontal plane is between 70° and 80°, and the angle between the air outlet holes on the outer wall of the bottom of the air blowing pipe and the bottom surface is between 40° and 50°.

[0009] By designing the opening position of the air outlet holes in the air blowing pipe, the flow efficiency of the high-pressure airflow is improved, and the scouring angle of the airflow on the inner wall of the steel shell can be adjusted to improve the scouring efficiency of floating nickel powder.

[0010] Preferably, the diameter of the air outlet hole is between 1 and 2 mm.

[0011] The vent hole diameter is set between 1-2mm to ensure a small diameter, which can further increase the pressure of the high-pressure airflow, thereby increasing the flushing force on the floating nickel shavings inside the steel shell.

[0012] Preferably, an electronic valve for controlling the air intake frequency and intake pressure of the air blowing pipeline is provided at the inlet of the air blowing pipeline.

[0013] The electronic valve is used to control the frequency of air blowing, thereby improving the stripping effect of floating nickel powder.

[0014] Preferably, the area formed by the lower edge of the vacuum tube is larger than the top opening of the steel shell.

[0015] The area formed by the lower outer periphery of the vacuum management system needs to completely cover the top opening of the steel shell to ensure that all the floating nickel powder carried by the high-pressure airflow enters the vacuum pipeline, rather than escaping to the outside and causing secondary pollution. At the same time, the fully enclosed steel shell can improve the flow efficiency of the high-pressure airflow, thereby improving the peeling effect of the floating nickel powder.

[0016] Preferably, the lower edge of the vacuum line is connected to the top opening of the steel shell through a small hole and / or a slot.

[0017] Preferably, the outer wall of the air blowing pipe is sealed and fixedly connected to the outer wall of the inner ring of the vacuum pipe.

[0018] The sealed connection between the outer wall of the air blowing pipeline and the outer wall of the inner ring of the vacuum pipeline is also designed to ensure the airtightness of the steel shell during operation and prevent gas leakage.

[0019] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0020] This invention utilizes air blowing and vacuum pipelines to flush the inside of the steel shell with high-pressure airflow, removing loose nickel dust. Compared to traditional brush cleaning, this method is more efficient, avoids secondary pollution, and significantly improves the cleaning efficiency and effectiveness of the steel shell. Attached Figure Description

[0021] Figure 1 This is a front sectional view of the present invention.

[0022] Figure 2This is a top view of the present invention.

[0023] Figure 3 This is a front sectional view of the present invention after it has been installed inside the steel shell.

[0024] The components include: 1. Air blowing pipe; 2. Vacuum pipe; 3. Steel shell; 4. Air outlet hole. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0026] See appendix Figures 1-3 The figure shows a device for dust removal inside the steel shell of a cylindrical lithium-ion battery, comprising a cylindrical air blowing pipe 1 and an annular vacuum pipe 2. The air blowing pipe 1 is connected to a compressed air source, and the vacuum pipe 2 is connected to a vacuum pumping device. After the air blowing pipe 1 is nested between the vacuum pipes 2, it extends into the steel shell 3 and exhausts air into the steel shell 3 through small air outlet holes 4 provided on the outer wall of the air blowing pipe 1. The lower edge of the vacuum pipe 2 is connected to the top opening of the steel shell 3 to extract the airflow inside the steel shell 3.

[0027] After high-pressure air is blown into the steel shell 3 through the air blowing pipe 1, the gas inside the steel shell 3 is then extracted through the vacuum management 2, realizing the circulation of high-pressure airflow inside the steel shell 3. The high-pressure airflow carries away the floating nickel powder inside the steel shell 3.

[0028] In this embodiment, the air outlet holes 4 are evenly distributed on the outer walls of both sides of the air blowing pipe 1 and the outer wall of the bottom of the air blowing pipe 1. The angle between the air outlet holes 4 on the outer walls of both sides of the air blowing pipe 1 and the horizontal plane is between 70° and 80°, and the angle between the air outlet holes 4 on the outer wall of the bottom of the air blowing pipe 1 and the bottom surface is between 40° and 50°.

[0029] By designing the opening position of the air outlet hole 4 on the air blowing pipe 1, the flow efficiency of the high-pressure airflow is improved, and the scouring angle of the airflow on the inner wall of the steel shell 3 can be adjusted to improve the scouring efficiency of floating nickel powder.

[0030] In this embodiment, the diameter of the air outlet hole 4 is between 1-2 mm. This design ensures that the diameter of the air outlet hole 4 is small enough to further increase the pressure of the high-pressure airflow, thereby increasing the scouring force on the floating nickel dust inside the steel shell 3.

[0031] In this embodiment, an electronic valve is provided at the inlet of the air blowing pipe 1 to control the air intake frequency and air intake pressure of the air blowing pipe 1. The electronic valve is used to control the air blowing frequency, thereby improving the peeling effect of floating nickel powder.

[0032] In this embodiment, the area formed by the lower outer periphery of the vacuum pipe 2 is larger than the top opening of the steel shell 3. The area formed by the lower outer periphery of the vacuum pipe 2 needs to completely cover the top opening of the steel shell 3 so that all the floating nickel powder carried by the high-pressure airflow can enter the vacuum pipe 2, instead of escaping to the outside and causing secondary pollution. At the same time, the fully enclosed steel shell 3 can improve the flow efficiency of the high-pressure airflow, thereby improving the peeling effect of the floating nickel powder.

[0033] In this embodiment, the lower edge of the vacuum line 2 is connected to the top opening of the steel shell 3 by a slot.

[0034] In this embodiment, the outer wall of the air blowing pipe 1 is sealed and fixedly connected to the outer wall of the inner ring of the vacuum pipe 2. This design is also to ensure the sealing effect inside the steel shell 3 during the operation of the device and prevent gas leakage.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A device for dust removal inside the steel casing of a cylindrical lithium-ion battery, characterized in that: It includes a cylindrical air blowing pipe and a circular vacuum pipe. The air blowing pipe is connected to a compressed air source, and the vacuum pipe is connected to a vacuum pumping device. The air blowing pipe is nested between the vacuum pipes and extends into the steel shell. The outer wall of the air blowing pipe is provided with a small air outlet hole, and the lower edge of the vacuum pipe is connected to the top opening of the steel shell.

2. The device for dust removal inside the steel casing of a cylindrical lithium-ion battery according to claim 1, characterized in that: The air outlet holes are evenly distributed on the outer walls of both sides of the air blowing pipe and on the outer wall of the bottom of the air blowing pipe. The angle between the air outlet holes on the outer walls of both sides of the air blowing pipe and the horizontal plane is between 70° and 80°, and the angle between the air outlet holes on the outer wall of the bottom of the air blowing pipe and the bottom surface is between 40° and 50°.

3. The device for dust removal inside the steel casing of a cylindrical lithium-ion battery according to claim 1, characterized in that: The diameter of the air outlet hole is between 1 and 2 mm.

4. The device for dust removal inside the steel casing of a cylindrical lithium-ion battery according to claim 1, characterized in that: An electronic valve is installed at the inlet of the air blowing pipeline to control the air intake frequency and intake pressure.

5. The device for dust removal inside the steel casing of a cylindrical lithium-ion battery according to claim 1, characterized in that: The area formed by the lower edge of the vacuum tube is larger than the top opening of the steel shell.

6. The device for dust removal inside the steel casing of a cylindrical lithium-ion battery according to claim 1, characterized in that: The lower edge of the vacuum line is connected to the top opening of the steel shell through a small hole and / or a slot.

7. The device for dust removal inside the steel casing of a cylindrical lithium-ion battery according to claim 1, characterized in that: The outer wall of the air blowing pipe is sealed and fixedly connected to the outer wall of the inner ring of the vacuum pipe.

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