U-shaped frame aerogel heat insulation pad and manufacturing method thereof

Abstract

The invention relates to a U-shaped frame aerogel heat insulation pad and a manufacturing method thereof.The manufacturing method comprises the following steps that S1, a fixing frame and a packaging film are prepared, and the fixing frame is in a U shape; s2, the adhesive surface of the packaging film faces upwards, the fixing frame is placed on one side of the packaging film, the fixing frame positions the packaging film, and the packaging film extends out of the opening side of the fixing frame in the opening direction of the fixing frame; s3, the buffer frame is in a U shape, the buffer frame is placed in the fixed frame, the opening orientation of the buffer frame is the same as that of the fixed frame, the outer circumferential surface of the buffer frame is attached to the inner circumferential surface of the fixed frame, and the buffer frame is placed on the packaging film; s4, putting an aerogel core material into the buffer frame; s5, the packaging film is folded upwards, the glue face of the folded packaging film is made to face downwards to cover the upper surface of the buffer frame, and a heat insulation pad pre-finished product is formed; s6, carrying out vacuum hot press molding on the heat insulation pad pre-finished product; s7, die cutting is conducted between the fixing frame and the buffering frame through a die cutting mechanism, and the heat insulation pad is formed; and packaging of the aerogel core material is realized under the combined action of the packaging film and the buffer frame.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery heat insulation, and particularly relates to a U-shaped frame aerogel heat insulation pad and a manufacturing method thereof. Background Art

[0002] In recent years, the battery safety problem of new energy vehicles has attracted much attention. Currently, the common method is to use an aerogel composite material to make a heat insulation pad between battery cells to play an adiabatic and flame-retardant role. However, during the charge and discharge process of new energy power battery cells, the volume will expand and contract repeatedly. The expansion and extrusion will affect the cycle life of the battery cells. Therefore, the heat insulation pad also needs to have a certain buffering ability. The battery cells will expand and contract during charge and discharge. The role of the buffer frame is to increase the buffering ability of the heat insulation pad. Buffer frames with different sizes, hardnesses, and thicknesses can be selected according to different packaging pressures.

[0003] In the processing of existing heat insulation pads, generally two-sided sealing or a loop frame is used for packaging processing. First, the aerogel core material is bonded to the buffer frame, and then it is bonded to the packaging film through vacuum hot pressing, and then the excess waste is cut off using a die cutter. Compared with two-sided sealing, the U-shaped frame has a better buffering effect and simpler processes. Compared with the loop frame, the cost of the buffer frame is reduced. However, when the packaging film is bonded to the U-shaped buffer frame, due to the lack of a positioning structure in the buffer frame, it is difficult to position between the packaging film and the buffer frame. After the packaging film and the buffer frame are hot pressed, it is easy to have a situation where the packaging film has large and small sides relative to the buffer frame. After trimming and forming, it will not only cause poor appearance but also affect the quality of the heat insulation pad. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a U-shaped frame aerogel heat insulation pad and a manufacturing method thereof to solve the problem that the frame is prone to shift during the packaging of the U-shaped frame heat insulation pad in the prior art, resulting in an uneven packaging effect.

[0005] To achieve the above purpose, the technical solution adopted by the manufacturing method of the U-shaped frame aerogel heat insulation pad of the present invention is: The manufacturing method of the U-shaped frame aerogel heat insulation pad includes the following steps: S1: Prepare a fixed frame and a packaging film, and the fixed frame is U-shaped; S2: Place the packaging film with the adhesive side facing up, and place the fixed frame on one side of the packaging film so that the fixed frame positions the packaging film, and the packaging film extends out of the opening side of the fixed frame in the opening direction of the fixed frame; S3: Prepare a buffer frame, and the buffer frame is U-shaped. Place the buffer frame in the fixed frame. The opening direction of the buffer frame is the same as the opening direction of the fixed frame. The outer peripheral surface of the buffer frame is attached to the inner peripheral surface of the fixed frame, and the buffer frame is placed on the packaging film; S4: Place an aerogel core material in the buffer frame; S5: Fold up the section of the encapsulation film away from the fixed frame upwards so that the turned-up encapsulation film has its adhesive side facing down and completely covers the upper surface of the buffer frame, forming a prefinished heat insulation pad; S6: Vacuum thermoform the prefinished heat insulation pad so that the encapsulation film is pasted and fixed on the upper and lower surfaces of the buffer frame; S7: Die-cut between the fixed frame and the buffer frame to form a heat insulation pad.

[0006] Beneficial effects: During the production process of the heat insulation pad in the present invention, before placing the buffer frame on the encapsulation film, first use the fixed frame to position the encapsulation film, and then use the fixed frame to position the buffer frame. Thus, when placing the encapsulation film relative to the buffer frame, it is avoided that the encapsulation film is placed obliquely relative to the buffer frame, that is, it is ensured that the encapsulation film is placed straight relative to the buffer frame, enabling the encapsulation film to completely wrap the buffer frame and the aerogel core material. Through the combined action of the encapsulation film and the buffer frame, a good encapsulation effect on the aerogel core material is achieved, ensuring the appearance qualification rate of the heat insulation pad and the high quality of the heat insulation pad.

[0007] Further, the encapsulation film is rectangular, and the length of the encapsulation film is not less than 2 times the length of the fixed frame in the opening direction.

[0008] Beneficial effects: After the encapsulation film is folded up, it can completely encapsulate the fixed frame.

[0009] Further, in S2, one side of the encapsulation film extends into the fixed frame, and the edge of the encapsulation film is fitted with the inner wall surface of the fixed frame to position the encapsulation film by fitting through the fixed frame.

[0010] Beneficial effects: The fixed frame positions the encapsulation film by the fitting of the inner wall surface of the fixed frame and the encapsulation film, ensuring that the encapsulation film is placed straight relative to the fixed frame.

[0011] Further, the width of the encapsulation film on the side facing the fixed frame is greater than the width of the inner frame of the fixed frame, and the width of the encapsulation film on the side away from the fixed frame is equal to the width of the inner frame of the fixed frame.

[0012] Beneficial effects: One side of the encapsulation film is wider and the other side is narrower, providing a basis for the fixed frame to press and position the encapsulation film.

[0013] Further, in S2, the fixed frame presses on the edge of the wider side of the encapsulation film to press and position the encapsulation film by the fixed frame.

[0014] Beneficial effects: When placing the fixed frame on the wider side of the encapsulation film, the fixed frame presses and positions the encapsulation film, further ensuring that the encapsulation film is placed straight relative to the fixed frame.

[0015] Further, the open end of the buffer frame is provided with a slope inclined along the opening direction of the buffer frame to facilitate the folding transition of the encapsulation film.

[0016] Beneficial effects: The provision of the inclined slope facilitates the folding transition of the encapsulation film and reduces the probability of the encapsulation film breaking at the folding point.

[0017] The U-shaped frame aerogel heat insulation pad includes a U-shaped buffer frame and an encapsulation film that is folded and covers the upper and lower sides of the U-shaped buffer frame on the opening side of the U-shaped buffer frame. The U-shaped buffer frame is filled with an aerogel core material, and the adhesive surface of the encapsulation film faces the buffer frame.

[0018] Beneficial effects: The U-shaped buffer frame encapsulation is simpler in the encapsulation process compared to the two-sided type encapsulation; compared to the four-edge sealing process, the U-shaped buffer frame encapsulation reduces the usage of the buffer frame material and lowers the manufacturing cost of the buffer frame. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the fixed frame and the encapsulation film in Embodiment 1 of the manufacturing method of the U-shaped frame aerogel heat insulation pad of the present invention; Figure 2 is a schematic diagram of the fixed frame positioning the encapsulation film in Embodiment 1; Figure 3 is a schematic diagram of the fixed frame simultaneously positioning the encapsulation film and the buffer frame in Embodiment 1; Figure 4 is a schematic diagram of folding and covering the encapsulation film relative to the buffer frame in Embodiment 1; Figure 5 is a schematic structural diagram of the fixed frame and the encapsulation film in Embodiment 2; Figure 6 is a schematic diagram of the buffer frame, the encapsulation film, and the aerogel core material in Embodiment 3; Figure 7 is a schematic diagram of the encapsulation film being folded relative to the buffer frame in Embodiment 3; Figure 8 is a schematic diagram of the completed heat insulation pad in Embodiment 3.

[0020] Reference numerals: 1 - fixed frame; 2 - encapsulation film; 3 - buffer frame; 10 - fixed frame; 20 - encapsulation film; 200 - encapsulation film; 300 - buffer frame; 400 - aerogel core material; 500 - slope. Detailed Embodiments

[0021] The following further describes in detail the manufacturing method of the U-shaped frame aerogel heat insulation pad of the present invention in conjunction with the drawings and specific embodiments: Embodiment 1: As Figures 1 - 4 shown, the manufacturing method of the U-shaped frame aerogel heat insulation pad of the present invention includes the following steps: S1: Prepare a fixed frame 1 and an encapsulation film 2, and the fixed frame 1 is U-shaped; The packaging film 2 is rectangular, and the length of the packaging film 2 is not less than twice the length of the opening direction of the fixing frame 1. In this embodiment, the packaging film 2 is a hot melt adhesive film, and specifically, the packaging film 2 can be a thermoplastic elastomer material such as TPE film, TPU film, POE film, TPEE film, TPV film, TPS film, etc.

[0022] S2: With the adhesive surface of the packaging film 2 facing upward, the fixing frame 1 is placed on one side of the packaging film 2, so that the fixing frame 1 is positioned relative to the packaging film 2, and the packaging film 2 extends out of the opening side of the fixing frame 1 in the opening direction of the fixing frame 1; The packaging film 2 is rectangular, and its length is not less than twice the length of the fixing frame 1 in the opening direction, so that after the packaging film 2 is folded, the length of the packaging film 2 can completely encapsulate the fixing frame 1.

[0023] When the packaging film 2 is positioned by the fixing frame 1, specifically, one side of the packaging film 2 extends into the fixing frame 1, and the edge of the packaging film 2 is fitted with the inner wall surface of the fixing frame 1, so that the packaging film 2 is fitted and positioned by the fixing frame 1 to avoid the packaging film 2 being placed crookedly relative to the fixing frame 1.

[0024] S3: prepare a buffer frame 3, the buffer frame 3 is U-shaped, the buffer frame 3 is placed in the fixed frame 1, the opening direction of the buffer frame 3 is the same as the opening direction of the fixed frame 1, the outer circumference of the buffer frame 3 is in contact with the inner circumference of the fixed frame 1, and the buffer frame 3 is placed on the packaging film 2; After the buffer frame 3 is placed in the fixed frame 1, the opening side of the buffer frame 3 is located on the same side of the opening of the fixed frame 1, so that the fixed frame 1 seals the aerogel core material in the buffer frame 3 to prevent the aerogel core material from leaking out of one side of the buffer frame 3 when the packaging film 2 is folded, causing the insulation pad to leak air and powder, thereby affecting the packaging quality of the insulation pad.

[0025] In this embodiment, the buffer frame 3 is a silicone frame. In other embodiments, the buffer frame 3 can also be any one of a ceramic silicone rubber frame, a rubber frame, a PPO frame, an MPP frame, an organic material frame, a mica board frame, a composite material frame, a foamed silicone frame, a foamed PU frame, a foam frame, a sponge frame, and a foam frame.

[0026] S4: placing the aerogel core material in the buffer frame 3 .

[0027] In this embodiment, the aerogel core material can be selected from any one of wet fiber felt, needle-punched fiber felt, and ceramic fiber felt containing aerogel with good thermal insulation properties.

[0028] S5: Fold upward a section of the packaging film 2 away from the fixing frame, so that the folded packaging film 2 has its adhesive surface facing downward and completely covers the upper surface of the buffer frame 3 and the upper surface of the core material, forming a pre-finished thermal insulation pad.

[0029] S6: Vacuum hot press the prefabricated heat insulation pad to paste and fix the encapsulation film 2 on the upper and lower surfaces of the buffer frame 3; In this embodiment, the prefabricated heat insulation pad is placed in a vacuum hot press for vacuum hot press forming. The structure and hot press principle of the vacuum hot press belong to the prior art and will not be elaborated here in detail.

[0030] S7: Use a die-cutting mechanism to perform die-cutting between the fixed frame 1 and the buffer frame 3 to separate the fixed frame 1 from the buffer frame 3. The buffer frame 3, the encapsulation film 2, and the aerogel core material form a heat insulation pad, and the fixed frame 1 can be reused.

[0031] In the present invention, first, the U-shaped buffer frame 3 is used in cooperation with the encapsulation film 2 to encapsulate the aerogel core material to form a heat insulation pad. Compared with the encapsulation of a two-sided buffer frame, the encapsulation process of the U-shaped buffer frame 3 is simple; compared with the encapsulation of a four-sided buffer frame, the usage amount of the silica gel frame is reduced, and the cost of the silicone rubber in the silica gel frame heat insulation pad is reduced. Second, the U-shaped buffer frame 3 is used in cooperation with the encapsulation film 2 to encapsulate the aerogel core material to form a heat insulation pad. Before placing the buffer frame 3 on the encapsulation film 2, first use the fixed frame 1 to position the encapsulation film 2, and then use the fixed frame 1 to position the buffer frame 3. Thus, when placing the encapsulation film 2 relative to the buffer frame 3, it is avoided that the encapsulation film 2 is placed obliquely relative to the buffer frame 3, that is, it is ensured that the encapsulation film 2 is placed straight relative to the buffer frame 3, ensuring the positioning accuracy of the buffer frame 3 and the encapsulation film 2, enabling the encapsulation film 2 to completely wrap the buffer frame 3 and the aerogel core material, and achieving a good encapsulation effect on the aerogel core material under the joint action of the encapsulation film 2 and the buffer frame 3, ensuring the appearance qualification rate of the heat insulation pad and the high quality of the heat insulation pad. Moreover, the encapsulation process of the heat insulation pad is simplified.

[0032] Embodiment 2, different from Embodiment 1, as Figure 5 shown, the width of the encapsulation film 20 on the side facing the fixed frame 10 is greater than the width of the inner frame of the fixed frame 10, and the width of the encapsulation film 20 on the side away from the fixed frame 10 is equal to the width of the inner frame of the fixed frame 10; when placing the fixed frame 10 on the encapsulation film 20, the fixed frame 10 presses on the edge of the wider side of the encapsulation film 20 to press and position the encapsulation film 20 through the fixed frame 10, avoiding the encapsulation film 2 being placed obliquely relative to the buffer frame 3, providing a basis for the accurate positioning of the encapsulation film 20 relative to the buffer frame 3.

[0033] Embodiment 3, different from Embodiment 1, as Figures 6 - 8As shown, in order to facilitate the folding transition of the encapsulation film 200, in this embodiment, a slope surface 500 inclined along the opening direction of the buffer frame 300 is provided at the open end of the buffer frame 300. That is, the closer the buffer frame 300 is to the open end, the smaller the thickness. Thus, when the encapsulation film 200 undergoes an encapsulation transition, the folding angle of the encapsulation film 200 is gradually transitioned, reducing the probability of the encapsulation film 200 breaking at the folding point, enabling the encapsulation film 200 to completely wrap the aerogel core material 400, and ensuring that the formed heat insulation pad has high quality.

[0034] The present invention also protects a U-shaped frame aerogel heat insulation pad, which includes a U-shaped buffer frame and an encapsulation film that is folded and covers the upper and lower sides of the U-shaped buffer frame on the open side of the U-shaped buffer frame. The U-shaped buffer frame is filled with an aerogel core material, and the adhesive surface of the encapsulation film faces the buffer frame. Compared with the two-sided encapsulation, the encapsulation process of the U-shaped buffer frame is simple; compared with the four-edge sealing process, the U-shaped buffer frame encapsulation reduces the usage amount of the buffer frame material and lowers the manufacturing cost of the buffer frame.

[0035] In the above embodiment, a slope surface inclined along the opening direction of the buffer frame is provided at the open end of the buffer frame. In other embodiments, the slope surface at the open end of the buffer frame may not be provided, that is, the thickness of the open end of the buffer frame does not change.

[0036] In the above embodiment, after the buffer frame is placed in the fixed frame, the open side of the buffer frame is located inside the open side of the fixed frame. In other embodiments, the open side of the buffer frame is flush with the open side of the fixed frame, and it can also achieve that after the encapsulation layer is folded, the fixed frame seals the aerogel core material in the buffer frame, preventing the aerogel core material from leaking out from one side of the buffer frame when the encapsulation film is folded, which may cause air leakage and powder leakage of the heat insulation pad and affect the encapsulation quality of the heat insulation pad; in other embodiments, the open side of the buffer frame may also be located outside the open side of the fixed frame. In this case, when the encapsulation film is folded, it should be ensured that the aerogel core material does not leak out from the folding point of the encapsulation film.

Claims

1. The manufacturing method of a U-shaped frame aerogel heat insulation pad, characterized in that, The following steps are involved: S1: prepare a fixing frame and a packaging film, the fixing frame is U-shaped; S2: One side of the packaging film is set as the adhesive side and faces upward, and the fixing frame is placed on one side of the packaging film so that the fixing frame is positioned relative to the packaging film, and the packaging film extends out of the opening side of the fixing frame in the opening direction of the fixing frame; S3: preparing a buffer frame, the buffer frame is U-shaped, the buffer frame is placed in the fixed frame, the opening direction of the buffer frame is the same as the opening direction of the fixed frame, the outer circumference of the buffer frame is attached to the inner circumference of the fixed frame, and the buffer frame is placed on the packaging film; S4: Place the aerogel core material in the buffer frame; S5: folding a section of the packaging film away from the fixed frame upward, so that the folded packaging film has an adhesive surface facing downward and completely covers the upper surface of the buffer frame, thereby forming a pre-finished thermal insulation pad; S6: forming the thermal insulation pad pre-finished product by vacuum hot pressing, so that the packaging film is adhered and fixed to the upper and lower surfaces of the buffer frame; S7: Die-cut between the fixed frame and the buffer frame to form a heat insulation pad.

2. The manufacturing method of the U-shaped frame aerogel heat insulation pad according to claim 1, characterized in that, The packaging film is rectangular, and the length of the packaging film is not less than twice the length of the fixing frame in the opening direction.

3. The manufacturing method of the U-shaped frame aerogel heat insulation pad according to claim 2, characterized in that, In S2, one side of the packaging film extends into the fixing frame, and the edge of the packaging film is made to fit with the inner wall surface of the fixing frame, so that the packaging film is fitted and positioned by the fixing frame.

4. The manufacturing method of the U-shaped frame aerogel heat insulation pad according to claim 1, characterized in that, The width of the packaging film on the side facing the fixed frame is greater than the width of the inner frame of the fixed frame, and the width of the packaging film on the side away from the fixed frame is equal to the width of the inner frame of the fixed frame.

5. The manufacturing method of the U-shaped frame aerogel heat insulation pad according to claim 4, characterized in that, In S2, the fixing frame is pressed against a wider side edge of the packaging film, so that the packaging film is pressed and positioned by the fixing frame.

6. The manufacturing method of the U-shaped frame aerogel thermal insulation pad according to any one of claims 1-5, characterized in that, The open end of the buffer frame is provided with a slope surface inclined along the opening direction of the buffer frame to facilitate the bonding with the packaging film.

7. The U-shaped frame aerogel thermal insulation pad manufactured by the method for manufacturing a U-shaped frame aerogel thermal insulation pad according to any one of claims 1-6, characterized in that, It includes a U-shaped buffer frame and a packaging film folded over the opening side of the U-shaped buffer frame to cover the upper and lower sides of the U-shaped buffer frame. The U-shaped buffer frame is filled with aerogel core material. The packaging film is arranged with its glue surface facing the buffer frame and is used to wrap and package the buffer frame.

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