Air supply device for cooling lithium battery drying chamber

Abstract

The utility model provides an air supply device for cooling a lithium battery drying chamber, which comprises a driving device, a volute with an air inlet and an air outlet, an air supply fan blade positioned in the volute, and a sealing structure for sealing a gap between an output shaft of the driving device and the volute, and the sealing structure is connected with the volute flange. According to the air supply device, the sealing structure is arranged between the output shaft of the driving device and the volute, and the sealing structure is connected with the volute flange, so that the air supply device is used for supplying air to cool the lithium battery drying chamber; by means of the air supply device, air can be prevented from leaking into the drying cavity from other areas except the air inlet and the air outlet of the air supply device, the problem that an air blower in the prior art is poor in sealing effect is solved, ambient air is prevented from entering the drying cavity in the cooling process, damage to the dried lithium battery is avoided, and effective sealing in the air blowing process is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lithium battery generally. More specifically, the utility model relates to a kind of air supply device for cooling lithium battery drying chamber. BACKGROUND

[0002] To improve the production capacity of lithium battery, after baking, lithium battery often needs to be cooled in time through cooling process, to quickly transfer the baked lithium battery to the next process, and before cooling starts, the vacuum of the oven of baked lithium battery, i.e. drying chamber, needs to be broken, and in general, inert gas such as nitrogen is used to break the vacuum of the drying chamber, i.e. the inert gas needs to be filled into the drying chamber, and during the process, a blower is often used, and due to poor sealing performance, the air in the surrounding environment will enter the drying chamber at the same time when breaking the vacuum of the drying chamber, i.e. when breaking the vacuum, the air in the environment where the drying chamber and the blower are located will leak into the drying chamber from other areas than the air inlet and air outlet of the air supply device, thereby causing damage to the dried lithium battery, and therefore, the sealing performance of the blower is required to be high, and the common air supply device cannot achieve effective sealing.

[0003] Therefore, there is an urgent need to provide an air supply device for cooling lithium battery drying chamber to solve the problem. SUMMARY

[0004] To solve at least one or more of the problems in the background art, the utility model provides an air supply device for cooling lithium battery drying chamber, and for this purpose, the utility model provides the following technical solutions.

[0005] The utility model discloses an air supply device for cooling lithium battery drying chamber, comprising: a driving device, a volute with an air inlet and an air outlet, and a blower fan blade located in the volute, a sealing structure for sealing the gap between the output shaft of the driving device and the volute, and the sealing structure is connected with the volute flange.

[0006] Preferably, the sealing structure comprises a rotating shaft and a shaft sleeve, two magnetic lining rings are arranged between the rotating shaft and the shaft sleeve in the axial direction of the rotating shaft, a permanent magnetic ring is arranged between the two magnetic lining rings, and the rotating shaft and the shaft sleeve are further filled with ferromagnetic fluid, one end of the rotating shaft is connected with the output shaft of the driving device, the other end of the rotating shaft is connected with the blower fan blade, and the shaft sleeve is sealingly connected with the volute.

[0007] Preferably, the shaft sleeve is fixedly connected with a mounting seat, and the mounting seat is connected with the volute flange.

[0008] Preferably, the volute is provided with reinforcing battens on both the inner side and the outer side, which are used to prevent the volute from deforming.

[0009] Preferably, a reducer pipe is arranged at the air outlet, and the end with a larger diameter of the reducer pipe is fixedly connected with the air outlet.

[0010] Preferably, the reducer pipe is a tapered pipe.

[0011] The technical scheme provided in the application can have the following beneficial effects:

[0012] By using the device described in the above and multiple schemes of the present application, the sealing structure is arranged between the output shaft of the driving device and the volute, and the sealing structure is connected with the volute flange, so that when the air supply device is used to supply air to cool the lithium battery drying chamber, air can be prevented from leaking into the drying chamber from other areas outside the air inlet and air outlet of the air supply device, thereby solving the problem of poor sealing effect of the air blower in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and other objects, features and advantages of the exemplary embodiments of the present application will be readily understood through reading the detailed description of the exemplary embodiments of the present application below, with reference to the accompanying drawings. In the drawings, several embodiments of the present application are shown by way of example and not limitation, and the same or corresponding reference numerals are used to indicate the same or corresponding parts. The drawings are as follows:

[0014] Fig. 1 is a schematic view showing one embodiment of the present application;

[0015] Fig. 2 is a perspective view of the sealing structure of the present application;

[0016] Fig. 3 is an internal schematic view of the sealing structure of the present application;

[0017] BRIEF DESCRIPTION OF DRAWINGS: 11, driving device; 12, volute; 13, sealing structure; 21, rotating shaft; 22, shaft sleeve; 23, magnetic lining ring; 24, permanent magnet ring; 31, mounting seat; 41, reinforcing batten; 51, reducer pipe. DETAILED DESCRIPTION

[0018] Embodiments will now be described with reference to the accompanying drawings. It should be understood that, for the sake of simplicity and clarity, reference numerals may be repeated in the drawings to indicate corresponding or similar elements where deemed appropriate. Furthermore, numerous specific details are set forth in this invention to provide a thorough understanding of the embodiments described herein. However, those skilled in the art will understand that the embodiments described herein can be practiced without these specific details. In other instances, well-known methods, processes, and components have not been described in detail so as not to obscure the embodiments described herein. Moreover, this description should not be construed as limiting the scope of the embodiments described herein.

[0019] like Figs. 1 to 3 As shown, according to one embodiment of the present invention, an air supply device for cooling a lithium battery drying chamber is provided, comprising: a drive device 11, a volute 12 having an air inlet and an air outlet, a fan blade located inside the volute 12, and a sealing structure 13 for sealing the gap between the output shaft of the drive device 11 and the volute 12, wherein the sealing structure 13 is flange-connected to the volute 12.

[0020] The aforementioned drive device 11 can be a motor. The air inlet of the volute 12 is used for the entry of inert gas. The fan blades send the inert gas out through the air outlet into the drying chamber. Since a sealing structure 13 is provided between the output shaft of the drive device 11 and the volute 12, when the air supply device is used to supply air to cool the lithium battery drying chamber, air leakage from other areas other than the air inlet and air outlet of the air supply device can be prevented from entering the drying chamber.

[0021] In one embodiment, the sealing structure 13 includes a rotating shaft 21 and a bushing 22. Two magnetic bushings 23 are provided between the rotating shaft 21 and the bushing 22 along the axial direction of the rotating shaft 21. A permanent magnetic ring 24 is provided between the two magnetic bushings 23. Ferrofluid is also filled between the rotating shaft 21 and the bushing 22. One end of the rotating shaft 21 is used to connect to the output shaft of the drive device 11, and the other end of the rotating shaft 21 is used to connect to the fan blade. The bushing 22 is sealed to the volute 12.

[0022] Because two magnetic bushings 23 are provided between the rotating shaft 21 and the bushing 22 of the sealing structure 13, and a permanent magnetic ring 24 is also provided between the two magnetic bushings 23, under the action of the magnetic field, the ferromagnetic fluid is attracted into the gap between the stationary magnetic bushings 23 and the rotating shaft 21, forming an O-ring fluid seal, thereby sealing the gap between the magnetic bushings 23 and the rotating shaft 21. When the output shaft of the drive device 11 rotates, the gap remains sealed due to the action of the magnetic field.

[0023] In the above embodiment, in order to improve the sealing of the shaft sleeve 22 and the volute 12, the shaft sleeve 22 is fixedly connected to the mounting seat 31, and then the mounting seat 31 is flange-connected to the volute 12.

[0024] In one embodiment, since the pressure difference between the air inlet and the air outlet of the volute 12 is sometimes large, in order to prevent the volute 12 from being deformed, a reinforcing batten 41 is arranged on the inner and outer sides of the volute 12.

[0025] In another embodiment, a reducer pipe 51 is arranged at the air outlet, and one end of the reducer pipe 51 with a large diameter is fixedly connected to the air outlet. The reducer pipe 51 is used to improve the flow rate of the inert gas at the air outlet, and in turn improve the gas replacement speed in the drying chamber.

[0026] In the above embodiment, the reducer pipe 51 is a tapered pipe.

[0027] It should be understood that the possible terms "first" or "second" and the like in the claims, specification and drawings of the present application are used to distinguish different objects, and are not used to describe a specific order. The terms "include" and "contain" used in the specification and claims of the present application indicate the presence of the described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0028] It should also be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms "a", "an" and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0029] Although the embodiments of the present application are as described above, the content is only for the purpose of understanding the present application, and is not intended to limit the scope and application of the present application. Any person skilled in the art of the present application, without departing from the spirit and scope of the present application, can make any modification and change in the form and details of the implementation, but the patent protection scope of the present application shall be subject to the scope defined by the appended claims.

Claims

1. An air supply device for cooling a lithium battery drying chamber, characterized in that, include: The drive unit (11), the volute (12) having an air inlet and an air outlet, the fan blades located inside the volute (12), and the sealing structure (13) for sealing the gap between the output shaft of the drive unit (11) and the volute (12), the sealing structure (13) being flange-connected to the volute (12).

2. The air supply device for cooling a lithium battery drying chamber according to claim 1, characterized in that, The sealing structure (13) includes a rotating shaft (21) and a bushing (22). Two magnetic bushings (23) are provided between the rotating shaft (21) and the bushing (22) along the axial direction of the rotating shaft (21). A permanent magnetic ring (24) is provided between the two magnetic bushings (23). Ferrofluid is also filled between the rotating shaft (21) and the bushing (22). One end of the rotating shaft (21) is used to connect with the output shaft of the drive device (11), and the other end of the rotating shaft (21) is used to connect with the fan blade. The bushing (22) is sealed to the volute (12).

3. The air supply device for cooling a lithium battery drying chamber according to claim 2, characterized in that, The bushing (22) is fixedly connected to the mounting base (31), and the mounting base (31) is connected to the flange of the volute (12).

4. The air supply device for cooling a lithium battery drying chamber according to claim 1, characterized in that, The inner and outer sides of the volute (12) are provided with reinforcing bars (41), which are used to prevent the volute (12) from deforming.

5. The air supply device for cooling a lithium battery drying chamber according to claim 1, characterized in that, A reducing pipe (51) is provided at the air outlet, and the end of the reducing pipe (51) with a larger diameter is fixedly connected to the air outlet.

6. The air supply device for cooling a lithium battery drying chamber according to claim 5, characterized in that, The reducing pipe (51) is a tapered pipe.

Images