High-moisture-adjusting sheet

Abstract

This utility model discloses a high-moisture-regulating sheet, comprising, from bottom to top, an encapsulation layer, a lower permeation layer, a moisture-absorbing layer, an upper permeation layer, and a breathable layer. The encapsulation layer uses a first high-temperature resistant heat-sealing film, with adhesive on its bottom surface. The moisture-absorbing layer is formed of absorbent rubber and absorbent cotton, with absorbent cotton pressed onto both the top and bottom surfaces of the absorbent rubber. The breathable layer uses a second high-temperature resistant heat-sealing film, with multiple vent holes. The area of ​​the moisture-absorbing layer is smaller than that of the encapsulation layer, lower permeation layer, upper permeation layer, and breathable layer. The edges of the breathable layer, upper permeation layer, and lower permeation layer are heat-pressed onto the top surface of the encapsulation layer to encapsulate the moisture-absorbing layer between the upper and lower permeation layers. The upper and lower permeation layers work together to isolate the moisture-absorbing layer from the external environment. This high-moisture-regulating sheet has the characteristics of high water absorption and high water absorption rate, effectively preventing the generation of flowing water, and significantly reducing costs.

Description

Technical Field

[0001] This utility model belongs to the field of humidity regulation technology for new energy vehicle battery packs, specifically relating to a high-humidity regulating sheet. Background Technology

[0002] Currently, the market share of new energy vehicles is increasing, and people's requirements for the performance and safety of new energy vehicle batteries are gradually rising. Therefore, the stability of the battery pack's internal environment is crucial. Excessive humidity inside the battery pack can easily lead to condensation, which not only causes corrosion but may also trigger electrical short circuits, resulting in serious consequences. Therefore, controlling the humidity inside the battery pack is of paramount importance for battery safety.

[0003] For regulating the humidity inside battery packs, traditional humidity regulating sheets have a low water absorption rate and a slow absorption rate. When the moisture absorption reaches its limit, water can easily flow inside the humidity regulating sheet. Since the moisture-absorbing layer of the humidity regulating sheet contains moisture-absorbing materials, the resulting water will contain ions contained in the moisture-absorbing materials. If leakage occurs, the consequences will be very serious. In addition, the breathable and waterproof membrane, namely PTFE membrane, used in traditional humidity regulating sheets is expensive, resulting in a high cost for traditional humidity regulating sheets. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the present invention provides a high-moisture conditioning sheet, which not only has the characteristics of high water absorption and high water absorption rate, but also effectively prevents the generation of flowing water, and the cost of the high-moisture conditioning sheet is significantly reduced.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A high-moisture-regulating sheet includes, from bottom to top, an encapsulation layer, a lower permeation layer, a moisture-absorbing layer, an upper permeation layer, and a breathable layer. The encapsulation layer uses a first high-temperature heat-sealing film, and an adhesive is provided on the bottom surface of the first high-temperature heat-sealing film. The moisture-absorbing layer is formed by water-absorbing rubber and moisture-absorbing cotton, and moisture-absorbing cotton is pressed onto both the top and bottom surfaces of the water-absorbing rubber. The breathable layer uses a second high-temperature heat-sealing film, and multiple air vents are formed on the second high-temperature heat-sealing film. The area of ​​the moisture-absorbing layer is smaller than the area of ​​the encapsulation layer, the lower permeation layer, the upper permeation layer, and the breathable layer. The edges of the breathable layer, the upper permeation layer, and the lower permeation layer are heat-pressed onto the top surface of the encapsulation layer to encapsulate the moisture-absorbing layer between the upper permeation layer and the lower permeation layer. The upper permeation layer and the lower permeation layer work together to isolate the moisture-absorbing layer from the external environment.

[0007] Furthermore, the adhesive layer is located directly below the first high-temperature heat-sealing film, the lower permeable layer is located directly above the first high-temperature heat-sealing film, the moisture-absorbing layer is located directly above the lower permeable layer, the upper permeable layer is located directly above the moisture-absorbing layer, and the breathable layer is located directly above the upper permeable layer.

[0008] Furthermore, the area of ​​the first high-temperature heat-sealing film is equal to that of the adhesive, the area of ​​the lower permeation layer is equal to that of the upper permeation layer, and the area of ​​the lower permeation layer is smaller than that of the breathable layer, and the area of ​​the breathable layer is smaller than that of the encapsulation layer.

[0009] Furthermore, the area of ​​the absorbent rubber in the absorbent layer is equal to that of the absorbent cotton; the absorbent layer is a single layer, or the absorbent layer is multiple layers, and the multiple absorbent layers are stacked sequentially from bottom to top.

[0010] Furthermore, the moisture-absorbing layer is formed by hot pressing unvulcanized water-absorbing rubber and moisture-absorbing cotton together.

[0011] Furthermore, the absorbent rubber is an acrylate absorbent rubber.

[0012] Furthermore, the absorbent cotton is polyester fiber absorbent cotton.

[0013] Furthermore, both the first high-temperature heat-sealing film and the second high-temperature heat-sealing film are PET films.

[0014] Furthermore, both the lower and upper permeation layers are nonwoven fabrics.

[0015] Furthermore, the adhesive is a double-sided adhesive.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The high-moisture-regulating sheet of this invention includes, from bottom to top, an encapsulation layer, a lower permeation layer, a moisture-absorbing layer, an upper permeation layer, and a breathable layer. The encapsulation layer uses a first high-temperature heat-sealing film, and an adhesive is provided on the bottom surface of the first high-temperature heat-sealing film. The moisture-absorbing layer is formed by water-absorbing rubber and moisture-absorbing cotton, and moisture-absorbing cotton is pressed onto both the top and bottom surfaces of the water-absorbing rubber. The breathable layer uses a second high-temperature heat-sealing film, and multiple air vents are provided on the second high-temperature heat-sealing film. The area of ​​the moisture-absorbing layer is smaller than the area of ​​the encapsulation layer, the lower permeation layer, the upper permeation layer, and the breathable layer. The edges of the breathable layer, the upper permeation layer, and the lower permeation layer are heat-pressed around the top surface of the encapsulation layer to encapsulate the moisture-absorbing layer between the upper permeation layer and the lower permeation layer. The upper permeation layer and the lower permeation layer work together to isolate the moisture-absorbing layer from the external environment. Because the moisture-absorbing layer is formed by absorbent rubber and absorbent cotton, with absorbent cotton pressed onto both the top and bottom surfaces of the absorbent rubber, the absorbent cotton sequentially absorbs moisture from the air surrounding the high-humidity humidifier through the pores in the breathable layer and the upper or lower permeation layer, or releases moisture into the air surrounding the high-humidity humidifier. When the absorbent cotton reaches its limit of absorbent moisture, any water flowing into the humidifier will be captured and locked by the absorbent rubber, achieving the effect of no water flowing in the entire high-humidity humidifier. Therefore, this moisture-absorbing layer, through the absorbent cotton and absorbent rubber... The combination of these features significantly enhances humidity regulation capabilities, giving the high-moisture-regulating sheet a high water absorption capacity. Furthermore, the breathable layer utilizes a second high-temperature resistant heat-sealing film with multiple pores, accelerating moisture passage and increasing the sheet's water absorption rate. Compared to the cost of the PTFE membrane used in traditional humidity-regulating sheets, the second high-temperature resistant heat-sealing film in this high-moisture-regulating sheet is less expensive, resulting in a lower overall cost. Therefore, this high-moisture-regulating sheet not only possesses high water absorption and a high absorption rate but also effectively prevents the formation of running water, while significantly reducing its cost. Attached Figure Description

[0018] Figure 1 A schematic diagram of the layered structure of the high-moisture conditioning sheet in this utility model after the adhesive is hidden;

[0019] Figure 2 This is a schematic diagram of the structure of the high-moisture conditioning sheet after packaging in this utility model.

[0020] The following are the labels in the attached diagram: 1. High moisture-regulating sheet; 101. Encapsulation layer; 102. Lower permeation layer; 103. Upper permeation layer; 104. Moisture-absorbing layer; 10401. Moisture-absorbing cotton; 10402. Water-absorbing rubber; 105. Breathable layer; 10501. Breathable pores; 106. Adhesive. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0022] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] like Figure 1 As shown, a high-moisture conditioning sheet includes, from bottom to top, an encapsulation layer 101, a lower permeation layer 102, a moisture-absorbing layer 104, an upper permeation layer 103, and a breathable layer 105; the encapsulation layer 101 is made of a first high-temperature heat-sealing film, and an adhesive 106 is provided on the bottom surface of the first high-temperature heat-sealing film; the moisture-absorbing layer 104 is formed of water-absorbing rubber 10402 and moisture-absorbing cotton 10401, and moisture-absorbing cotton 10401 is pressed onto both the top and bottom surfaces of the water-absorbing rubber 10402; the breathable layer 105... 5. A second high-temperature heat-sealing film is used, which has multiple vent holes 10501. The area of ​​the moisture-absorbing layer 104 is smaller than the area of ​​the encapsulation layer 101, the lower permeation layer 102, the upper permeation layer 103, and the breathable layer 105. The edges of the breathable layer 105, the upper permeation layer 103, and the lower permeation layer 102 are heat-pressed onto the top surface of the encapsulation layer 101 to encapsulate the moisture-absorbing layer 104 between the upper permeation layer 103 and the lower permeation layer 102, thus obtaining a high-moisture-regulating sheet 1. Figure 2The upper permeable layer 103 and the lower permeable layer 102 work together to isolate the moisture-absorbing layer 104 from the external environment. Both the first high-temperature heat-sealing film and the second high-temperature heat-sealing film are PET films.

[0026] Since the moisture-absorbing layer 104 is formed by water-absorbing rubber 10402 and moisture-absorbing cotton 10401, and the top and bottom surfaces of the water-absorbing rubber 10402 are both covered with moisture-absorbing cotton 10401, the moisture-absorbing cotton 10401 sequentially absorbs moisture from the air in the environment where the high-humidity conditioning sheet 1 is located or releases moisture into the air in the environment where the high-humidity conditioning sheet 1 is located through the air vents 10501 in the breathable layer 105 and the upper permeation layer 103 or the lower permeation layer 102. When the moisture-absorbing cotton 10401 absorbs the maximum amount of moisture, the water flowing into the humidity conditioning sheet after the moisture re-enters the sheet will be captured and locked by the water-absorbing rubber 10402, thus achieving the effect of no water flowing in the entire high-humidity conditioning sheet 1. The moisture-absorbing layer 104, through the cooperation of the moisture-absorbing cotton 10401 and the water-absorbing rubber 10402, can significantly improve the humidity regulation capability, giving the high-humidity regulating sheet 1 a high water absorption capacity. Furthermore, since the breathable layer 105 uses a second high-temperature heat-sealing film with multiple air vents 10501, this porous film accelerates the passage of moisture, thereby increasing the water absorption rate of the high-humidity regulating sheet 1. In addition, compared to the cost of the breathable and waterproof PTFE membrane used in traditional humidity regulating sheets in the prior art, the second high-temperature heat-sealing film used in the breathable layer 105 of the high-humidity regulating sheet 1 has a lower cost, thus reducing the overall cost of the high-humidity regulating sheet 1. Therefore, the high-humidity regulating sheet 1 not only possesses high water absorption capacity and high water absorption rate, but also effectively prevents the generation of flowing water, eliminating the risk of leakage as seen in the prior art, and significantly reducing the cost of the high-humidity regulating sheet 1.

[0027] The upper permeable layer 103 and the lower permeable layer 102 work together to completely wrap the moisture-absorbing layer 104. The upper permeable layer 103 and the lower permeable layer 102 can both provide breathability and limit the expansion of the moisture-absorbing layer 104. They can also prevent the moisture-absorbing layer 104 from directly contacting the breathable layer 105, thereby isolating the moisture-absorbing layer 104 from the external environment, protecting the moisture-absorbing layer 104, and preventing seepage from the surface of the high-moisture conditioning sheet 1.

[0028] The adhesive 106 is used for mounting and fixing the high-moisture conditioning sheet 1.

[0029] The encapsulation layer 101 uses a first high-temperature heat-sealing film, making the high-moisture conditioning sheet 1 suitable for use in high-temperature environments.

[0030] Among them, the water-absorbing rubber 10402 has excellent water retention capacity and does not produce flowing water after absorbing water.

[0031] In one embodiment, the adhesive 106 is located directly below the first high-temperature heat-sealing film, the lower permeable layer 102 is located directly above the first high-temperature heat-sealing film, the moisture-absorbing layer 104 is located directly above the lower permeable layer 102, the upper permeable layer 103 is located directly above the moisture-absorbing layer 104, and the breathable layer 105 is located directly above the upper permeable layer 103.

[0032] Preferably, the area of ​​the first high-temperature heat-sealing film is equal to that of the adhesive 106, the area of ​​the lower permeation layer 102 is equal to that of the upper permeation layer 103, and the area of ​​the lower permeation layer 102 is smaller than that of the breathable layer 105, and the area of ​​the breathable layer 105 is smaller than that of the encapsulation layer 101.

[0033] In one embodiment, the area of ​​the absorbent rubber 10402 and the absorbent cotton 10401 in the absorbent layer 104 is equal; the absorbent layer 104 may be a single layer or multiple layers, with the multiple absorbent layers 104 stacked sequentially from bottom to top. The specific number of absorbent layers 104 may be increased or decreased according to the required water absorption rate.

[0034] In one embodiment, the moisture-absorbing layer 104 is formed by hot pressing unvulcanized water-absorbing rubber 10402 and moisture-absorbing cotton 10401 together. In this way, the unvulcanized water-absorbing rubber 10402 is vulcanized during the hot pressing process and is tightly bonded to the moisture-absorbing cotton 10401 on the upper and lower sides.

[0035] In one embodiment, the absorbent rubber 10402 is acrylate absorbent rubber 10402; the absorbent cotton 10401 is polyester fiber absorbent cotton 10401; the lower permeable layer 102 and the upper permeable layer 103 are both low-weight nonwoven fabrics; and the adhesive 106 is double-sided adhesive. Specific Implementation

[0037] The thickness of the water-absorbing rubber 10402 in the moisture-absorbing layer 104 is 0.5-2mm, and the thickness of the single piece of moisture-absorbing cotton 10401 in the moisture-absorbing layer 104 is 0.05-0.2mm. The moisture-absorbing layer 104 is mainly used for moisture absorption and control to prevent the generation of flowing water. The thickness of the upper permeable layer 103 and the lower permeable layer 102 is 0.05-0.2mm. The thickness of the breathable layer 105 is 0.05-0.2mm. The thickness of the sealing layer 101 is 0.05-0.2mm. The thickness of the adhesive 106 is 0.05-0.2mm.

[0038] This high-humidity humidity regulating sheet 1 can be used in the battery packs of new energy vehicles. It can effectively control the humidity of the internal environment of the battery pack, prevent condensation, provide reliable humidity protection for the safe operation of the battery in the battery pack, and maintain its own structural stability. This high-humidity humidity regulating sheet 1 is reasonably designed, meets market demand, and is suitable for promotion.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A high-moisture-holding humidifying sheet, characterized by: The system includes, from bottom to top, a sealing layer (101), a lower permeation layer (102), a moisture-absorbing layer (104), an upper permeation layer (103), and a breathable layer (105); the sealing layer (101) is made of a first high-temperature heat-sealing film, and an adhesive (106) is provided on the bottom surface of the first high-temperature heat-sealing film; the moisture-absorbing layer (104) is formed of water-absorbing rubber (10402) and moisture-absorbing cotton (10401), and the top of the water-absorbing rubber (10402) is... Moisture-absorbing cotton (10401) is pressed onto both the top and bottom surfaces; the breathable layer (105) adopts a second high-temperature heat-sealing film, and the second high-temperature heat-sealing film has multiple air vents (10501); the edges of the breathable layer (105), the upper permeable layer (103) and the lower permeable layer (102) are heat-pressed onto the top surface of the encapsulation layer (101) to encapsulate the moisture-absorbing layer (104) between the upper permeable layer (103) and the lower permeable layer (102).

2. The high-moisture-regulating sheet according to claim 1, wherein: The adhesive (106) is located directly below the first high-temperature heat-sealing film, the lower permeable layer (102) is located directly above the first high-temperature heat-sealing film, the moisture-absorbing layer (104) is located directly above the lower permeable layer (102), the upper permeable layer (103) is located directly above the moisture-absorbing layer (104), and the breathable layer (105) is located directly above the upper permeable layer (103).

3. The high-moisture-regulating sheet according to claim 2, wherein: The first high-temperature heat-sealing film and the adhesive (106) have the same area, the lower permeation layer (102) and the upper permeation layer (103) have the same area, and the area of ​​the lower permeation layer (102) is smaller than the area of ​​the breathable layer (105), and the area of ​​the breathable layer (105) is smaller than the area of ​​the encapsulation layer (101).

4. The high-moisture-regulating sheet according to claim 1, wherein: The water-absorbing rubber (10402) and the moisture-absorbing cotton (10401) in the moisture-absorbing layer (104) have the same area; the moisture-absorbing layer (104) is a single layer, or the moisture-absorbing layer (104) is a multi-layer layer, and the multi-layer moisture-absorbing layer (104) is stacked sequentially from bottom to top.

5. The high-moisture-regulating sheet according to claim 1, wherein: The moisture-absorbing layer (104) is formed by hot pressing unvulcanized water-absorbing rubber (10402) and moisture-absorbing cotton (10401).

6. The high-moisture-regulating sheet according to claim 1, wherein: The water-absorbing rubber (10402) is an acrylate water-absorbing rubber (10402).

7. The high-moisture-regulating sheet according to claim 1, wherein: The absorbent cotton (10401) is polyester fiber absorbent cotton (10401).

8. The high-moisture-regulating sheet according to claim 1, wherein: Both the first high-temperature heat-sealing film and the second high-temperature heat-sealing film are PET films.

9. The high-moisture-regulating sheet according to claim 1, wherein: Both the lower permeation layer (102) and the upper permeation layer (103) are non-woven fabrics.

10. The high-moisture-regulating sheet according to claim 1, wherein: The adhesive (106) is a double-sided adhesive.

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