Driving device for removing foreign matters in air

Abstract

The utility model discloses a driving device for removing foreign matters in air, which comprises a suction device and a main pipeline, the output end of the suction device is communicated with the main pipeline, the output end of the main pipeline is connected with an air inlet of a kiln, the main pipeline is detachably connected with a first two-way pipeline and a second two-way pipeline, and the first two-way pipeline and the second two-way pipeline are communicated with each other. A demagnetizing device is fixedly arranged in the first two-way pipeline, a fine filtering device is fixedly arranged in the second two-way pipeline, a first two-way valve is fixedly arranged at the input end of the first two-way pipeline, and a second two-way valve is fixedly arranged at the input end of the second two-way pipeline; the first two-way pipeline provided with the demagnetizing device and the second two-way pipeline provided with the fine filtering device are arranged on the main pipeline to adsorb magnetic foreign matters and foreign matters with large particles in the air, and the first two-way pipeline and the second two-way pipeline are detachably connected. And the demagnetizing device and the fine filtering device can be replaced without shutdown, so that the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of lithium battery production technology, and more specifically, to an injection device for removing foreign air particles. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, the sintering process of the cathode material has a crucial impact on battery performance, especially the choice of sintering atmosphere. The gas required for sintering ternary materials is generally oxygen or air. In industrial production, low-nickel products (nickel molar content in nickel-cobalt-manganese precursors is less than 60%) are generally sintered in air mode. In practice, the sintering reaction of ternary materials in air mode typically involves directly injecting ambient air into the roller kiln using a blower. The ternary precursor and lithium salt mixture reacts directly with the oxygen in the air. This method has lower manufacturing costs, but it introduces a large amount of non-metallic / metallic foreign matter into the kiln, directly contacting the ternary materials. This results in high magnetic foreign matter content, which has several impacts on battery performance. First, magnetic foreign matter may increase the battery's internal resistance, reducing charge and discharge efficiency. Second, magnetic foreign matter may cause local short circuits during charge and discharge, leading to capacity decay or even thermal runaway. Furthermore, magnetic foreign matter may also affect the battery's cycle life and safety performance.

[0003] Therefore, the air required for the sintering production process of cathode materials needs to be filtered in advance to meet the requirements before it can react with the mixture of ternary precursors and lithium salts. Currently, there is no air filtration device specifically for kilns, which increases the risk of magnetic foreign objects in ternary materials, leading to an increase in abnormal materials and higher manufacturing costs.

[0004] Therefore, it is necessary for the inventors to design a new injection device for removing foreign objects from the air in order to overcome the above problems. Summary of the Invention

[0005] The main objective of this application is to provide an air injection device for removing foreign matter from the air, in order to solve the problem in related technologies that the air injected into the kiln contains a large number of magnetic foreign matter.

[0006] To achieve the above objectives, this application provides an air-pumping device for removing foreign matter, comprising a suction device and a main pipe. The output end of the suction device is connected to the main pipe, and the output end of the main pipe is connected to the kiln air inlet. A first double-pass pipe and a second double-pass pipe are detachably connected to the main pipe. A demagnetizing device is fixedly installed in the first double-pass pipe, and a fine filter is fixedly installed in the second double-pass pipe. A first double-pass valve is fixedly installed at the input end of the first double-pass pipe, and a second double-pass valve is fixedly installed at the input end of the second double-pass pipe.

[0007] Optionally, the demagnetizing device includes a permanent magnet separator, which includes a plurality of magnetic rods inserted into the first dual-channel pipe.

[0008] Optionally, the magnetic field strength of a single magnetic rod is 6000-10000 Gs.

[0009] Optionally, the fine filtration device is a synthetic fiber filter element with a pore size of 0.01-0.1 μm.

[0010] Optionally, a coarse filter is also fixedly installed at the input end of the suction device.

[0011] Optionally, the coarse filtration device is filter cotton.

[0012] Optionally, the second dual-pass pipe is located near the suction device, and the first dual-pass device is located near the output end of the main pipe.

[0013] Optionally, a detection device is also fixedly installed between the output end of the main pipeline and the first dual-pass pipeline.

[0014] Optionally, the testing equipment includes a water storage tank and a branch pipe, one end of which is connected to the main pipeline and the other end of which is connected to the water storage tank.

[0015] The present invention provides an injection device for removing airborne foreign objects, which has the following advantages compared with the prior art:

[0016] By installing a first double-pass pipe equipped with a demagnetizing device and a second double-pass pipe equipped with a fine filter on the main pipeline, magnetic foreign objects and larger particles in the air are adsorbed and treated, which greatly reduces the magnetic foreign objects mixed in the positive electrode material and improves the purity of the positive electrode material. In addition, the first double-pass pipe and the second double-pass pipe can be detachably connected, and the demagnetizing device and the fine filter can be replaced without stopping the machine, which improves production efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0018] Figure 1 This is an overall structural diagram of the present invention;

[0019] Figure 2 This is a structural diagram of the magnetic rod of this utility model in the first double-pass pipe;

[0020] Figure 3 This is a structural diagram of the magnetic rod of this utility model;

[0021] Figure 4 This is a schematic diagram of the synthetic fiber filter element of this utility model in the second double-pass pipe;

[0022] Figure 5 This is a schematic diagram of the synthetic fiber filter element of this utility model.

[0023] The components include: 1. Suction device; 2. Main pipeline; 3. First double-pass pipeline; 4. Second double-pass pipeline; 5. First double-pass valve; 6. Second double-pass valve; 7. Magnetic rod; 8. Synthetic fiber filter element; 9. Coarse filtration device; 10. Water storage tank; 11. Branch pipe. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0028] In addition, the term "multiple" should mean two or more.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 5 As shown, an air intake device for removing foreign matter from the air includes a suction device 1 and a main pipe 2. The output end of the suction device 1 is connected to the main pipe 2, and the output end of the main pipe 2 is connected to the kiln air inlet. A first double-pass pipe 3 and a second double-pass pipe 4 are detachably connected to the main pipe 2. A demagnetizing device is fixedly installed in the first double-pass pipe 3, and a fine filter is fixedly installed in the second double-pass pipe 4. A first double-pass valve 5 is fixedly installed at the input end of the first double-pass pipe 3, and a second double-pass valve 6 is fixedly installed at the input end of the second double-pass pipe 4. Specifically, air is drawn into the main pipe 2 by the suction device 1, and then sequentially passes through the first double-pass pipe 3 and the second double-pass pipe 4 before entering the kiln air inlet. When the air passes through the first double-pass pipe 3, the demagnetizing device adsorbs magnetic foreign matter in the air. When the air passes through the second double-pass pipe 4, the fine filter removes dust and other particulate matter from the air, preventing dust from entering the kiln. When the demagnetizing device adsorbs a large amount of magnetic foreign matter, accumulation occurs, reducing the effectiveness of subsequent adsorption. In this case, the demagnetizing device in the first double-pass pipe 3 needs to be cleaned or replaced. This is done by closing the inlet and outlet of the first double-pass pipe 3 (which requires replacement) using the first double-pass valve 5, while keeping the other double-pass pipe open. The suction device 1 can then operate normally without shutdown. Similarly, when the fine filter in the second double-pass pipe 4 needs replacement, the same procedure is followed. This embodiment, by installing a first double-pass pipe 3 equipped with a demagnetizing device and a second double-pass pipe 4 equipped with a fine filter on the main pipe 2, adsorbs magnetic foreign matter and larger particles in the air, significantly reducing the amount of magnetic foreign matter mixed into the positive electrode material and improving its purity. Furthermore, the first double-pass pipe 3 and the second double-pass pipe 4 are detachably connected, allowing for replacement of the demagnetizing and fine filter devices without shutting down the system, thus improving production efficiency.

[0031] The demagnetizing device includes a permanent magnet separator, which comprises multiple magnetic rods 7 inserted into the first double-pass pipe 3. The magnetic field strength of a single magnetic rod 7 is 6000-10000 Gs. Specifically, magnetic foreign objects are attracted by multiple magnetic rods 7. Multiple through holes can be provided in the first double-pass pipe 3 for installing the magnetic rods 7, and the magnetic rods 7 are hollow to allow air to pass through.

[0032] The fine filtration device is a synthetic fiber filter element 8, and the pore size of the synthetic fiber filter element 8 is 0.01-0.1μm. Specifically, the synthetic fiber filter element 8 has low cost and good filtration effect.

[0033] The input end of the suction device 1 is also fixedly equipped with a coarse filter device 9. The coarse filter device 9 is a filter cotton. Specifically, the air is coarsely filtered by the filter cotton. The cost of the filter cotton is lower than that of the magnetic rod 7 and the synthetic fiber filter element 8. During coarse filtration, larger magnetic foreign objects and dust in the air are reduced from entering the main pipe 2, thereby reducing the consumption of the magnetic rod 7 and the synthetic fiber filter element 8.

[0034] The second dual-pass pipe 4 is located near the suction device 1, and the first dual-pass device is located near the output end of the main pipe 2. Specifically, magnetic foreign objects in the air are first filtered by a fine filter, and smaller magnetic foreign objects are then adsorbed by the magnetic rod 7, which can reduce the consumption of the magnetic rod 7. Here, the two can be interchanged, which can reduce the consumption of the synthetic fiber filter element 8.

[0035] A detection device is also fixedly installed between the output end of the main pipeline 2 and the first dual-pass pipeline 3. The detection device includes a water storage tank 10 and a branch pipe 11. One end of the branch pipe 11 is connected to the main pipeline 2, and the other end is connected to the water storage tank 10. Specifically, a valve can be installed on the branch pipe 11 to periodically introduce air from the main pipeline 2 into the water storage tank 10, and then detect the content of various foreign objects in the water storage tank 10. This allows for the determination of the content of various foreign objects at the output end of the main pipeline 2, preventing excessive foreign objects in the positive electrode material caused by failure to clean or replace the demagnetizing device or fine filter in time when the filtration effect of the demagnetizing device and fine filter deteriorates.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A driving-in device for removing air inclusions, characterized in that: The application relates to a suction device (1) and a main pipeline (2), the output end of the suction device (1) is communicated with the main pipeline (2), the output end of the main pipeline (2) is connected with a kiln air inlet, the first double-passage pipeline (3) and the second double-passage pipeline (4) are detachably connected with the main pipeline (2), the first double-passage pipeline (3) is fixedly provided with a magnetic removal device, the second double-passage pipeline (4) is fixedly provided with a fine filter device, the input end of the first double-passage pipeline (3) is fixedly provided with a first double-passage valve (5), and the input end of the second double-passage pipeline (4) is fixedly provided with a second double-passage valve (6).

2. The driving device for removing air foreign matters according to claim 1, wherein: The magnetic removal device comprises a permanent magnet iron remover which comprises a plurality of magnetic rods (7) inserted into the first double-passage pipeline (3).

3. A driving device for removing foreign matters in air according to claim 2, wherein: The magnetic field intensity of a single magnetic rod (7) is 6000-10000Gs.

4. The impact device for removing air-borne foreign matter as claimed in claim 1, wherein: The fine filter device is a synthetic fiber filter core (8) with a pore size of 0.01-0.1 mu m.

5. The air-filled foreign object removal device as described in claim 1, characterized in that: The input end of the suction device (1) is further fixedly provided with a coarse filter device (9).

6. A driving device for removing air foreign matter according to claim 5, wherein: The coarse filter device (9) is filter cotton.

7. The apparatus of claim 1 wherein: the punch is formed of a material that is harder than the material of the air-removal device. The second double-passage pipeline (4) is close to the suction device (1), and the first double-passage device is close to the output end of the main pipeline (2).

8. The apparatus of claim 1 wherein: the punch is formed of a material that is harder than the material of the air-removal device. The output end of the main pipeline (2) and the first double-passage pipeline (3) are further fixedly provided with a detection device. ​ 9. A driving device for removing air foreign matter according to claim 8, wherein: The detection device comprises a water storage pool (10) and a branch pipeline (11), one end of the branch pipeline (11) is connected with the main pipeline (2), and the other end is connected with the water storage pool (10).

Images