Universal secondary battery drying structure

Abstract

The utility model discloses a universal secondary battery drying structure which is placed in a drying oven or a turnover box for use, the drying structure comprises two telescopic sliding rods which are arranged in parallel, a folding drying plate is arranged between the two telescopic sliding rods, and a drying space for a secondary battery is formed by the upper part or the lower part of the folding drying plate and the interior of the drying oven or the turnover box. The universal secondary battery drying structure disclosed by the utility model has the characteristics of strong applicability, high drying efficiency and good storage performance.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary batteries, in particular to a universal secondary battery drying structure. Background Art

[0002] The baking process is an important process in the production of secondary batteries. Before filling the battery, the battery cell needs to be placed in a turnover box and baked in a vacuum high-temperature oven for multiple vacuuming and high-temperature baking to remove moisture from the pole piece and diaphragm. The vacuum oven reduces the internal air pressure to a negative pressure state, thereby reducing the boiling point of water and accelerating the drying speed. The core of the working principle is that the battery cell is evacuated and dehumidified by a vacuum pump in the closed environment of the oven, so that a vacuum state is formed in the oven; baking in a vacuum environment can quickly evaporate the moisture in the battery cell, achieving the purpose of making the battery cell drier. At the same time, the set heating and vacuuming cycles ensure that the battery cell will not absorb water again due to contact with air.

[0003] In the current baking process, there are the following practical problems: for example, after the cells of different sizes are placed in the turnover box, due to the limitation of the internal space of the vacuum oven, the existing turnover box cannot accommodate more cells to be baked according to the cell size, resulting in a waste of space in the oven. For example, in the process of drying the cells in the oven, it is necessary to go through multiple cycles, that is, after the cells are placed in the oven → vacuuming → heating for multiple cycles, cooling and vacuum storage, the waiting time in the entire baking process is long, which reduces production efficiency. Utility Model Content

[0004] The utility model aims to provide a universal secondary battery drying structure, which has the characteristics of strong applicability, high drying efficiency and good storage performance.

[0005] The utility model can be realized by the following technical solutions:

[0006] The utility model discloses a universal secondary battery drying structure, which is placed in an oven or a turnover box for use. The drying structure comprises two telescopic slide bars arranged in parallel, a folding drying plate is arranged between the two telescopic slide bars, and the upper or lower part of the folding drying plate and the interior of the oven or the turnover box form a drying space for the secondary battery.

[0007] Furthermore, the folding drying plate is designed as a zigzag folding plate, and the telescopic slide bar is used to stretch or compress the angle and space between two adjacent plates. The movement of the folding drying plate is controlled by the telescopic slide bar, and the operation and control are convenient.

[0008] Furthermore, the folding drying plate comprises a carrier plate body, and both sides of the carrier plate body are provided with drying material layers. By providing the drying material layers, the drying capacity of the folding drying plate is effectively guaranteed.

[0009] Furthermore, the drying material layer is an aluminum oxide material layer, an activated carbon material layer or a silica gel material layer, all of which are physical adsorption drying materials and can be repeatedly recycled to save usage costs.

[0010] Taking the alumina material layer as an example, the activated alumina used is a porous, highly dispersed solid material with a large surface area. Its microporous surface has super strong adsorption performance and excellent thermal stability. As an efficient desiccant for deep drying of trace water, activated alumina is mainly reflected in the following aspects: First, activated alumina is a high-surface-area alumina with very strong adsorption capacity. Second, the surface of activated alumina has abundant hydroxyl groups and alumina bonds, while water molecules have one oxygen atom and two hydrogen atoms. When water molecules come into contact with the surface of activated alumina, they interact with the hydroxyl groups and alumina bonds on the surface to form hydrogen bonds and oxygen bonds. The formation of these bonds increases the interaction force between activated alumina and water molecules, thereby attracting water molecules to the surface and adsorbing them on the surface. After absorbing water, it does not swell or crack and remains in its original state. It is non-toxic, odorless, and insoluble in water and ethanol. The water absorption capacity of activated alumina is not limited to its high surface area and porosity, but also because it can quickly dehydrate during high temperature processes, achieving reversibility of the adsorption process, which means that activated alumina can absorb water when needed and release water when conditions change. During the vacuum baking process of the battery cell, the battery cell is placed in a drying structure made of activated alumina folding drying plates. By stretching the folding drying plates or adjusting the retractable sliding rods, the battery cell can be reasonably arranged in the limited space of the turnover box and oven. During the baking process of the battery cell, the folding drying plates of activated alumina can absorb all the water volatilized after the battery cell is heated at one time, reducing the number of cycles, achieving the effect of quickly baking the moisture of the battery cell, and improving production efficiency.

[0011] Furthermore, in the carrier body, two adjacent folding plates are connected by a movable hinge, and the adjustable angle of the movable hinge is 0-180 degrees, which has a large adjustment angle and meets the applicability of space and battery type.

[0012] Furthermore, the carrier body is a single-layer porous plate or a multi-layer composite plate, and the outermost plate body of the multi-layer composite plate is a porous plate, which ensures the bonding ability between the drying material layer and the carrier body and has sufficient drying material adsorption capacity.

[0013] Furthermore, the secondary battery is a sodium ion battery or a lithium ion battery, which meets the drying requirements of different types of batteries.

[0014] Furthermore, the sodium ion battery is a polyanion material battery, a layered oxide material battery or a Prussian blue material battery, which meets the use requirements of different types of sodium ion batteries.

[0015] Furthermore, the drying material layer is a single-layer or multi-layer composite structure, and the thickness of the drying material of the multi-layer composite structure increases gradually from the inside to the outside, so that it has a larger adsorption capacity and more convenient reuse capability.

[0016] Furthermore, the types of drying materials in two adjacent layers of the drying material layer of the multi-layer composite structure are different, thereby forming a better drying adsorption gradient and improving the drying efficiency.

[0017] The utility model provides a universal secondary battery drying structure, which has the following beneficial effects:

[0018] First, it has strong applicability. Through the design of telescopic slide rods and folding drying plates, the size of the drying structure can be flexibly adjusted according to the internal space of the oven or turnover box through telescopic and folding, meeting the use requirements of different spaces; at the same time, the angle between adjacent folding plates can also be adjusted to meet the drying use requirements of secondary batteries of different sizes;

[0019] Second, the drying efficiency is high. Through the design of the folded drying plate, a sufficient drying surface is formed on the folded drying plate, which improves the drying efficiency and ensures the drying effect. At the same time, the secondary battery is placed between two adjacent drying plates, which can also make full use of the space to ensure the drying efficiency and effect.

[0020] Third, it has good storage performance. The structural design of the telescopic slide rod and folding drying plate allows the entire drying structure to be folded into a storage box when not in use, which is both portable and space-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 This is a structural schematic diagram of a universal secondary battery drying structure of the utility model;

[0022] Attached Figure 2 This is a schematic diagram of the expanded structure of a universal secondary battery drying structure of the utility model;

[0023] Attached Figure 3 It is a schematic diagram of the cross-sectional structure of a folded drying plate;

[0024] The reference numerals in the accompanying drawings include: 100, telescopic slide rod; 200, foldable drying plate; 210, carrier plate body; 220, drying material layer. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with embodiments.

[0026] like Figures 1-2As shown, the utility model discloses a universal secondary battery drying structure, which is placed in an oven or a turnover box for use. The drying structure includes two telescopic slide bars 100 arranged in parallel, and a folding drying plate 200 is arranged between the two telescopic slide bars 100. The upper or lower part of the folding drying plate 200 and the interior of the oven or the turnover box form a drying space for the secondary battery. Specifically, the folding drying plate 200 is a zigzag folding plate design, and the telescopic slide bar 100 is stretched or compressed to adjust the angle and space between the two adjacent plates.

[0027] like Figure 3 As shown, the folding drying plate 200 includes a carrier body 210 , and drying material layers 220 are disposed on both sides of the carrier body 210 .

[0028] In the present invention, in order to ensure drying efficiency and drying effect, the drying material layer is an aluminum oxide material layer, an activated carbon material layer or a silica gel material layer. Specifically, the carrier body is a single-layer porous plate or a multi-layer composite plate, and the outermost plate body of the multi-layer composite plate is a porous plate. The drying material layer is a single-layer or multi-layer composite structure, and the thickness of the drying material of the multi-layer composite structure increases gradually from the inside to the outside; the drying material types of two adjacent layers of the drying material layer of the multi-layer composite structure are different.

[0029] In the utility model, in order to realize the adjustability of the structure, in the carrier body, two adjacent folding plates are connected by a movable hinge, and the adjustable angle of the movable hinge is 0-180 degrees.

[0030] In terms of applicability, the utility model has no special restrictions on the battery type, and the secondary battery is a sodium ion battery or a lithium ion battery. Taking the sodium ion battery as an example, the sodium ion battery is a polyanion material battery, a layered oxide material battery or a Prussian blue material battery.

[0031] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are 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 cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The above embodiments are only specific embodiments of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these obvious replacement forms all belong to the protection scope of the present invention.

Claims

1. A universal secondary battery drying structure, placed in an oven or a turnover box for use, characterized in that: The drying structure comprises two telescopic slide bars arranged in parallel, a folding drying plate is arranged between the two telescopic slide bars, and the upper or lower part of the folding drying plate and the interior of the oven or the turnover box form a drying space for the secondary battery.

2. The universal secondary battery drying structure according to claim 1, characterized in that: The folding drying plate is designed as a sawtooth folding plate, and the angle and space between two adjacent plates are adjusted by stretching or compressing the telescopic slide rod.

3. The universal secondary battery drying structure according to claim 2, characterized in that: The folding drying plate comprises a carrier body, and drying material layers are arranged on both sides of the carrier body.

4. The universal secondary battery drying structure according to claim 3, characterized in that: The drying material layer is an aluminum oxide material layer, an activated carbon material layer or a silica gel material layer.

5. The universal secondary battery drying structure according to claim 4, characterized in that: In the carrier body, two adjacent folding plate bodies are connected by a movable hinge, and the adjustable angle of the movable hinge is 0-180 degrees.

6. The universal secondary battery drying structure according to claim 5, characterized in that: The carrier plate body is a single-layer porous plate or a multi-layer composite plate, and the outermost plate body of the multi-layer composite plate is a porous plate.

7. The universal secondary battery drying structure according to claim 6, characterized in that: The secondary battery is a sodium ion battery or a lithium ion battery.

8. The universal secondary battery drying structure according to claim 7, characterized in that: The sodium ion battery is a polyanion material battery, a layered oxide material battery or a Prussian blue material battery.

9. The universal secondary battery drying structure according to claim 8, characterized in that: The desiccant material layer is a single layer or multi-layer composite structure, and the thickness of the desiccant material in the multi-layer composite structure increases gradually from the inside to the outside.

10. The universal secondary battery drying structure according to claim 9, characterized in that: The types of desiccant materials in two adjacent desiccant material layers of the multi-layer composite structure are different.

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