Vacuum drying device applied to lithium battery

Abstract

The utility model relates to a vacuum drying device applied to lithium batteries, which comprises a rack and a vacuum drying box, the vacuum drying box is fixed on the upper portion of the rack and comprises a closed box body, a track for conveying battery products, a vacuum degree adjusting device, an airflow disturbance device and an airing rack for storing the battery products, and the airing rack is provided with a plurality of airing layers. One or more battery products are placed on each airing layer; a blocking mechanism used for fixing the drying rack is arranged on the track; the vacuum degree adjusting device comprises at least two groups of vacuum pump units; the airflow disturbance devices are located in the middle and on the lower portion of the drying rack. The device has the beneficial effects that a closed structure is adopted, moisture in air is reduced, and the situation that the surface of a workpiece is oxidized, and the performance of a product is affected is avoided; and through the conveying track in the dried product bin, the drying rack is convenient to move and carry, and time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a vacuum drying device applied to lithium batteries. Background Art

[0002] As non-renewable energy is gradually consumed, the carbon emissions generated by the use of non-renewable energy have led to global warming. It is imperative to vigorously promote the development of renewable energy and transform the energy structure. While developing renewable energy such as wind power and photovoltaics, the proportion of fluctuating power generation due to its instability continues to rise. Therefore, in order to balance the relationship between power supply and demand, it is usually necessary to equip the renewable energy power generation system with a certain capacity of energy storage device, so as to play a role in peak regulation of the power station, promote the consumption of new energy and improve the quality of power.

[0003] Take the production of lithium batteries as an example. When injecting liquid, the electrolyte (lithium hexafluorophosphate, etc.) is injected into the battery according to the required amount through the reserved injection hole. Before injecting liquid, it needs to be baked at high temperature to bake the moisture to the range required by the process. The general baking temperature is 110℃, but the injection temperature should be controlled below 45℃ to ensure the stability of the electrolyte.

[0004] Chinese patent CN2018222459530, this utility model discloses a vacuum drying device that can shorten the drying time of lithium-ion batteries, including a drying box, a dry gas injection pipe and a vacuum pipe are arranged on the top of the drying box, the dry gas injection pipe and the top of the vacuum pipe are each connected to a sealed connection valve, an infrared drying lamp is arranged on the inner side wall of the drying box, a box bottom plate is arranged at the bottom of the drying box, and a metal tray is arranged above the box bottom plate. 1. This lithium-ion battery drying device improves the heat exchange efficiency through the metal tray; at the same time, the vacuum degree is increased from -0.1MPa to -200Pa, increasing the water diffusion rate; the ventilation frequency is increased from 2 hours / time to 0.5 hours / time, accelerating the thermodynamic equilibrium process; the ventilation mode is changed from vacuum-dry gas filling cycle to dry gas filling-vacuum cycle, which improves the drying degree, thereby quickly drying the lithium battery.

[0005] However, the above method lacks a large-scale application environment and cannot achieve mass production of battery products. Moreover, in the above drying process, hot air drying of battery products will cause some workpiece surfaces to oxidize, affecting product performance. Therefore, a vacuum drying device for lithium batteries is developed and designed. Utility Model Content

[0006] The utility model provides a vacuum drying device applied to lithium batteries to solve the problems in the prior art.

[0007] The technical problem solved by the utility model is achieved by the following technical solutions:

[0008] A vacuum drying device for lithium batteries, comprising:

[0009] frame,

[0010] The vacuum drying box is fixed on the upper part of the frame, and includes a sealed box body, a track for conveying battery products, a vacuum degree adjustment device, an air flow disturbance device, and a drying rack for storing battery products.

[0011] The drying rack has several drying layers, and one or more battery products are placed on each drying layer;

[0012] A blocking mechanism for fixing the drying rack is provided on the track;

[0013] The vacuum degree adjustment device comprises at least two vacuum pump units;

[0014] The air flow disturbance device is located in the middle and lower parts of the drying rack.

[0015] As a preferred technical solution, the vacuum drying oven is provided with an inspection door, and a transparent inspection window is provided on the inspection door to facilitate viewing of the conditions inside the vacuum drying oven.

[0016] As a preferred technical solution, the vacuum drying box also includes a temperature regulating device, which is an air condenser, so as to reduce the surface oxidation of the battery product under low temperature conditions to avoid affecting the performance of the product.

[0017] As a preferred technical solution, during operation, the temperature in the vacuum drying oven is 4°C-25°C.

[0018] As a preferred technical solution, the drying racks are at least two groups.

[0019] As a preferred technical solution, the number of the drying layers is 5-15 layers.

[0020] As a preferred technical solution, the height of each drying layer is not less than 1.5 times the height of the battery product.

[0021] As a preferred technical solution, a limiting block for fixing the battery product is provided on the drying layer.

[0022] As a preferred technical solution, the vacuum degree of the vacuum drying oven is -0.09 MPa.

[0023] As a preferred technical solution, the number of the airflow disturbance devices is at least 2 groups, and each group of the airflow disturbance devices includes two fans that are respectively arranged opposite to each other.

[0024] As a preferred technical solution, the air volume of the fan is 40m 3 / min-120m 3 / min.

[0025] The utility model has the following beneficial effects: (1) the closed structure is adopted to reduce the moisture in the air and avoid the oxidation of the workpiece surface which affects the performance of the product.

[0026] (2) The conveyor track in the drying product warehouse facilitates the movement of the drying rack, making it easy to carry and save time.

[0027] (3) Compared with natural cooling, this equipment effectively reduces the time for drying and cooling batteries and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 This is one of the structural schematic diagrams of the utility model: a vacuum drying device applied to lithium batteries;

[0030] Figure 2 This is the second structural schematic diagram of the utility model: a vacuum drying device applied to lithium batteries;

[0031] Figure 3 for Figure 2 Middle AA section view;

[0032] Figure 4 for Figure 2 Middle BB section view;

[0033] Figure 5 The utility model is a structural schematic diagram of a drying rack of a vacuum drying device applied to lithium batteries.

[0034] Among them: 99-battery products, 100-rack, 200-vacuum drying oven,

[0035] 210-box, 220-track, 230-vacuum adjustment device, 240-air flow disturbance device, 250-drying rack, 260-temperature adjustment device,

[0036] 201-inspection door, 221-blocking mechanism, 231-vacuum pump unit, 241-fan, 251-drying layer, 252-limiting block. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0038] Example 1

[0039] Reference Figure 1-5 As shown, a vacuum drying device for lithium batteries includes: a frame 100 and a vacuum drying box 200. The vacuum drying box 200 is fixed on the upper part of the frame 100, and includes a sealed box body 210, a track 220 for conveying battery products 99, a vacuum degree adjustment device 230, an air flow disturbance device 240, and a drying rack 250 for storing battery products 99.

[0040] The drying rack 250 of the utility model has several drying layers 251, and one or more battery products 99 are placed on each drying layer 251; the drying rack 250 in this embodiment is at least two groups, wherein the number of drying layers 251 is 5-15 layers. The drying rack 250 with a multi-layer structure can meet the cooling operation of more battery products 99. For example, each group of drying racks 250 has 9 layers, and each layer has 9 battery products 99. The device can cool up to 162 (2X9X9) battery products 99 at a time.

[0041] The height of each drying layer 251 of the utility model is not less than 1.5 times the height of the battery product 99, and a limit block 252 for fixing the battery product 99 is provided on the drying layer 251. The fixation of the battery product 99 by the limit block 252 ensures the stability of the battery product 99. At the same time, the restriction on the height of the drying layer 251 is conducive to maximizing the efficiency of the battery product 99 during the cooling process.

[0042] During operation, in order to prevent the drying rack 250 from moving, a blocking mechanism 221 for fixing the drying rack 250 is provided on the track 220 .

[0043] The vacuum degree adjusting device 230 of the utility model comprises at least two vacuum pump units 231. When working, the vacuum degree of the vacuum drying box 200 is -0.09 MPa. A high vacuum environment is adopted to improve the drying efficiency of the battery product 99.

[0044] The air flow disturbance device 240 of the utility model is located in the middle and lower part of the drying rack 250, wherein the number of the air flow disturbance device 240 is at least 2 groups, and each group of the air flow disturbance device 240 includes two fans 241 respectively arranged opposite to each other. Specifically, the air volume of the fan 241 is 40m 3 / min-120m 3 / min. The turbulence of the fan 241 improves the drying efficiency of the battery product 99.

[0045] The vacuum drying box 200 of the present invention is provided with an inspection door 201 , and a transparent inspection window is provided on the inspection door 201 , so as to facilitate checking the situation inside the vacuum drying box 200 .

[0046] The vacuum drying box 200 of the present invention further includes a temperature regulating device 260, which is an air condenser. Under low temperature conditions, the surface oxidation of the battery product 99 is reduced to avoid affecting the performance of the product.

[0047] During operation, the temperature in the vacuum drying oven 200 is 4°C-25°C.

[0048] Specifically, the use process of this device is as follows:

[0049] ①. The front-end equipment transports the drying rack 250 carrying the battery product 99 to the vacuum drying box 200 via the track 220;

[0050] ②. Turn on the vacuum pump unit 231, evacuate to the set vacuum degree (such as -0.09MPa), and set the vacuum time.

[0051] ③. Start the air flow disturbance device 240 and the temperature adjustment device 260, and wait for the vacuum drying to be completed.

[0052] Under high vacuum conditions, high vacuum technology is used, the ultimate vacuum degree of the cavity is ≤-0.095MPa, and the vacuum degree can reach -0.09MPa under working conditions. The cavity is at room temperature to ensure that the residual gas inside the battery is removed quickly and efficiently, thereby allowing the liquid to fill the entire battery.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0054] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum drying device for lithium batteries, It is characterized in that include: frame, The vacuum drying box is fixed on the upper part of the frame, and includes a sealed box body, a track for conveying battery products, a vacuum degree adjustment device, an air flow disturbance device, and a drying rack for storing battery products. The drying rack has several drying layers, and one or more battery products are placed on each drying layer; A blocking mechanism for fixing the drying rack is provided on the track; The vacuum degree regulating device comprises at least two groups of vacuum pump units; The air flow disturbance device is located in the middle and lower parts of the drying rack.

2. A vacuum drying device for lithium batteries according to claim 1, It is characterized in that The vacuum drying box is provided with an inspection door, and a transparent inspection window is provided on the inspection door.

3. A vacuum drying device for lithium batteries according to claim 1, It is characterized in that The vacuum drying box also includes a temperature regulating device, which is an air condenser.

4. A vacuum drying device for lithium batteries according to claim 3, It is characterized in that During operation, the temperature in the vacuum drying oven is 4°C-25°C.

5. A vacuum drying device for lithium batteries according to claim 1, It is characterized in that The drying racks are in at least two groups.

6. A vacuum drying device for lithium batteries according to claim 1, It is characterized in that The number of the drying layers is 5-15 layers.

7. A vacuum drying device for lithium batteries according to claim 6, It is characterized in that The height of each drying layer is not less than 1.5 times the height of the battery product.

8. A vacuum drying device for lithium batteries according to claim 6, It is characterized in that The drying layer is provided with a limiting block for fixing the battery product.

9. A vacuum drying device for lithium batteries according to claim 1, It is characterized in that The vacuum degree of the vacuum drying oven is -0.09 MPa.

10. A vacuum drying device for lithium batteries according to claim 1, It is characterized in that The number of the airflow disturbance devices is at least 2 groups, and each group of the airflow disturbance devices includes two fans that are respectively arranged opposite to each other.

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