New energy battery heat insulation sheet production device and production method

Abstract

The invention discloses a new energy battery heat insulation sheet production device which comprises a rack, a plurality of guide roller sets, a die cutting roller set and a diaphragm, the rack is rotationally provided with a first protective film winding roller and a second protective film winding roller, and the periphery of the first protective film winding roller and the periphery of the second protective film winding roller are wound with protective films respectively; the protective film is attached to the upper side and the lower side of the diaphragm in a rolling mode through the guide roller set, and a material belt is formed. The guide roller sets are continuously arranged at intervals in the diaphragm conveying direction, and the die cutting roller set is located behind the multiple guide roller sets which are continuously arranged and used for die cutting of a material belt. The production efficiency and quality of the new energy battery heat insulation sheet can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of new energy battery heat insulation sheet production technology, and more particularly to a new energy battery heat insulation sheet production apparatus and a new energy battery heat insulation sheet production method. Background Technology

[0002] As a core component in new energy vehicles and energy storage equipment, the safety performance and thermal management capabilities of new energy batteries directly determine the reliability of the products. Thermal insulation sheets, as key thermal protection components inside new energy batteries, effectively block heat conduction between individual battery cells and prevent the spread of thermal runaway, making them an important structural component for improving the safety level of battery packs.

[0003] Currently, most new energy battery heat insulation sheets adopt a multi-layer structure design combining a separator and a heat insulation gasket. The production process requires multiple steps, including separator grooving, gasket embedding, protective film lamination, and die-cutting. Among these steps, during the die-cutting process, due to the material characteristics and thickness differences of the multi-layer composite strips, traditional die-cutting rollers cannot achieve differentiated depth cutting.

[0004] Therefore, the present invention provides a new technical solution to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new energy battery heat insulation sheet production device that can effectively improve the production efficiency and quality of new energy battery heat insulation sheets.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A new energy battery heat insulation sheet production device includes a frame, several guide roller groups, a die-cutting roller group and a separator. The frame is rotatably mounted with a protective film winding roller one and a protective film winding roller two. Protective film is wound around the outer periphery of the protective film winding roller one and the protective film winding roller two respectively.

[0008] The protective film is pressed and adhered to the upper and lower sides of the diaphragm by a set of guide rollers to form a strip;

[0009] The guide roller groups are arranged continuously and at intervals along the diaphragm conveying direction, and the die-cutting roller group is located after the continuously arranged guide roller groups and is used for die-cutting the material strip.

[0010] The present invention is further configured such that the diaphragm is formed with a plurality of vertically penetrating dividing grooves after being die-cut at the front end, and the dividing grooves are arranged side by side at intervals.

[0011] The invention is further configured to include a gasket, the size of which is adapted to the size of a plurality of partition grooves, so that the gasket can be completely laid inside the partition grooves.

[0012] The present invention is further configured such that the protective film covers and adheres to the upper and lower sides of the diaphragm respectively, and can be adhered to and limited to the upper and lower sides of the heat insulation sheet in a plurality of partition grooves.

[0013] The present invention is further configured such that the guide roller groups are all rotatably mounted on the frame, including a first guide roller group, a second guide roller group and a third guide roller group, each guide roller group including an upper pressure roller and a lower pressure roller, the upper pressure roller being located directly above the lower pressure roller.

[0014] The present invention is further configured such that the first guide roller group can press and adhere the diaphragm to the upper side of the protective film, the second guide roller group can press and adhere the protective film to the upper side of the diaphragm and form a material strip, and the third guide roller group can roll and convey the material strip to the die-cutting roller group.

[0015] The present invention is further configured such that the die-cutting roller assembly is rotatably mounted on the frame, including a die-cutting roller and a support roller, the support roller abutting against the lower side of the protective film on the lower side of the diaphragm, and the die-cutting roller is located directly above the support roller, enabling it to die-cut the material strip.

[0016] The present invention is further configured to include a waste material take-up roller, wherein the waste material take-up roller includes a first waste material take-up roller, a second waste material take-up roller, and a third waste material take-up roller, which are rotatably mounted on the frame for taking up waste material.

[0017] A method for producing heat insulation sheets for new energy batteries, using the new energy battery heat insulation sheet production apparatus described above.

[0018] The beneficial effects of this invention are as follows: This device integrates processes such as diaphragm conveying, gasket embedding, double-sided protective film roll pressing and bonding, die cutting and forming, and waste material winding into the same frame, eliminating the material transfer links between processes in the traditional process and shortening the production flow time; at the same time, by continuously and intermittently setting multiple sets of guide rollers along the diaphragm conveying direction, and cooperating with the synchronous operation of the die cutting rollers, continuous processing of heat insulation sheets from raw materials to finished products is realized, which greatly improves the overall processing efficiency of the production line and reduces manual transfer costs.

[0019] The device employs a three-stage roller pressing design. The first set of guide rollers initially bonds the diaphragm to the lower protective film. The second set of guide rollers covers the upper protective film and encloses and restricts the gaskets within the separator grooves. The third set of guide rollers further presses the material strip to improve the adhesion strength and flatness between film layers. This staged pressing method effectively avoids the air bubbles and wrinkles caused by single-layer pressing, ensuring a tight bond between the protective film, diaphragm, and gaskets. Furthermore, the gaskets remain within the separator grooves without shifting or loosening, significantly improving the stability and consistency of the multi-layer composite structure of the heat insulation sheet.

[0020] The die-cutting roller assembly adopts a structure in which the die-cutting roller and the support roller are arranged correspondingly on the upper and lower sides. The cutting depth of the die-cutting roller can be flexibly adjusted, which can achieve differentiated depth cutting for the multi-layer composite structure of the material strip. This ensures that the heat insulation sheet contour is completely cut through and formed, while avoiding over-cutting and damage to the core layer gasket. At the same time, the multiple sets of blades on the outer periphery of the die-cutting roller can complete the synchronous die-cutting of multiple heat insulation sheets in one go, further improving processing efficiency while ensuring the dimensional accuracy and shape consistency of the heat insulation sheet, effectively improving the product yield.

[0021] The device is equipped with multiple sets of waste rewinding rollers to classify and rewind waste materials from different positions and film layers during the die-cutting process. With the auxiliary bonding effect of the tape rewinding roller, it achieves thorough cleaning and centralized recycling of waste materials, solving the problems of waste material entanglement and residue in traditional centralized rewinding methods and reducing the manual waste cleaning process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a new energy battery heat insulation sheet production device in this embodiment.

[0023] Figure 2 This is a cross-sectional view of a new energy battery heat insulation sheet production device in this embodiment.

[0024] Figure 3 This is a schematic diagram of the structure of a new energy battery heat insulation sheet in this embodiment.

[0025] Figure 4 This is an exploded view of a heat insulation sheet for a new energy battery in this embodiment.

[0026] Figure 5 This is a schematic diagram showing the outer periphery of the die-cutting roller in a new energy battery heat insulation sheet production device in this embodiment.

[0027] Figure 6 This is a partial die-cutting diagram of the material strip in a new energy battery heat insulation sheet according to this embodiment.

[0028] Figure 7 This is a cross-sectional view of the material strip in a new energy battery heat insulation sheet according to this embodiment.

[0029] Figure 8 This is a cross-sectional view of a specific location cut in the material strip of a new energy battery heat insulation sheet in this embodiment.

[0030] Reference numerals: Frame 1; Diaphragm 2; Separator 21; Gasket 3; Protective film 4; Protective film take-up roller 1 41; Protective film take-up roller 2 42; Release paper 43; Guide roller group 5; First guide roller group 51; First guide roller group 52; First guide roller group 53; Upper pressure roller 54; Lower pressure roller 55; Die-cutting roller group 6; Die-cutting roller 61; Blade 1 611; Blade 2 612; Blade 3 613; Blade 4 614; Blade 5 615; Blade 6 616; Support roller 62; Waste take-up roller 7; Waste take-up roller 1 71; Waste take-up roller 2 72; Waste take-up roller 3 73; Adhesive tape 8; Adhesive tape take-up roller 81; Material tape 9; First cutting position 91; Second cutting position 92; Third cutting position 93; Fourth cutting position 94; Fifth cutting position 95; Sixth cutting position 96; Waste 97. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] This embodiment discloses a production apparatus for heat insulation sheets of new energy batteries, referring to... Figures 1-3 As shown, the main components include a frame 1, several guide roller groups 6, a die-cutting roller group 7, and a diaphragm 2. Protective film take-up roller 1 41 and protective film take-up roller 2 42 are rotatably mounted on the frame 1. Protective film 4 is wound around the outer periphery of the protective film take-up roller 1 41 and protective film take-up roller 2 42, respectively. The protective film 4 is rolled and adhered to the upper and lower sides of the diaphragm 2 by the guide roller group 5 to form a material strip 9. The guide roller groups 5 are connected and spaced apart along the conveying direction of the diaphragm 2. The die-cutting roller group 6 is located after the several guide roller groups 5 that are continuously arranged, and is mainly used for die-cutting the material strip 9.

[0033] Reference Figure 1 As shown, the guide roller group 5 consists of three groups, all rotatably mounted on the frame 1, including a first guide roller group 51, a second guide roller group 52, and a third guide roller group 53. The three guide roller groups 5 are arranged at intervals along the conveying direction of the diaphragm 2. Specifically, each guide roller group 5 includes an upper pressure roller 54 and a lower pressure roller 55, wherein the upper pressure roller 54 is located directly above the lower pressure roller 55 and can be adjusted in the vertical direction, so that the distance between the upper pressure roller 54 and the lower pressure roller 55 can be adaptively adjusted according to the thickness of the film material, thereby improving the versatility of the device.

[0034] After being die-cut at the front end, the diaphragm 2 has several vertically penetrating dividing grooves 21, which are arranged side by side at intervals. A protective film take-up roller 41 is rotatably mounted below the diaphragm 2. One end of the protective film 4 is wound around the protective film take-up roller 41, and the other end is wound around the guide roller group 5. The diaphragm 2 is pressed and adhered to the upper side of the protective film 4 by the first guide roller group 51. A second protective film take-up roller 42 is rotatably mounted above the diaphragm 2. One end of the protective film 4 is wound around the second protective film take-up roller 42, and the other end is pressed and adhered to the upper side of the diaphragm 2 by the second guide roller group 52. The first guide roller group 51... Between the second guide roller group 52 and the second guide roller group 52, a gasket 3 is placed in each dividing groove 21 on the diaphragm 2 by manual operation. The size of the gasket 3 can be adapted to the size of each dividing groove 21. After the diaphragm 2 passes through the first guide roller group 51 and the second guide roller group 52, a protective film 4 is attached to the upper and lower sides of the diaphragm 2 respectively. This can wrap and limit the gasket 3 in the dividing groove 21 on the diaphragm 2 to form a material strip 9. Then the material strip 9 is rolled by the third guide roller group 53, which can increase the bonding strength and flatness between the protective film and the diaphragm 2 in the material strip 9. Then the material strip 9 is conveyed to the die-cutting roller group 6 for die cutting.

[0035] Reference Figure 2 and Figure 3 As shown, after the diaphragm 2 passes through the guide roller group 5, protective films 4 are applied to the upper and lower sides of the diaphragm 2 to form a strip 9. Then, the strip 9 is die-cut into an independent heat insulation sheet by the die-cutting roller group 6. Specifically, the die-cutting roller group 6 includes a die-cutting roller 61 and a support roller 62. The support roller 62 abuts against the lower side of the protective film 4. The die-cutting roller 61 is located directly above the support roller 62 and can be adjusted in the vertical direction. Several protruding blades are provided on the outer periphery of the die-cutting roller 61 to die-cut the strip 9. Since the strip 9 is formed by multiple layers of film material, the cutting depth at different positions varies according to processing requirements, mainly depending on the blade depth at the cutting position. After cutting, the waste material 97 needs to be wound up. Due to the difference in cutting thickness and the different bonding degrees between different film materials, the winding of the waste material 97 formed by cutting is carried out in multiple times.

[0036] Specifically, several waste material take-up rollers 7 are rotatably mounted on the frame 1, mainly including waste material take-up roller one 71, waste material take-up roller two 72, and waste material take-up roller three 73. Among them, waste material take-up roller one 71 and waste material take-up roller three 73 are used to take up the waste material 97 formed by side cutting. Since the material strip 9 is formed by multiple layers of film material and the bonding strength between each film material is different, waste material take-up roller one 71 cannot completely collect the waste material 97. Some waste material 97 needs to be processed in a secondary manner. Specifically, a tape take-up roller 81 is also rotatably mounted on the frame 1. Tape 8 is wrapped around the outer circumference of tape take-up roller 81. Through the bonding effect of tape 8, the remaining waste material 97 is completely collected, and the tape 8 with the waste material 97 is wound into waste material take-up roller two 72. After the material strip 9 is die-cut, it forms an independent heat insulation sheet, which is then collected in a collection box.

[0037] This embodiment also discloses a method for producing heat insulation sheets for new energy batteries, which uses the new energy battery heat insulation sheet production apparatus as described in the above embodiment.

[0038] Reference Figure 8 As shown, the heat insulation sheet is a multi-layer film composite structure. Specifically, a vertically penetrating partition groove 21 is provided on the partition 2, and a gasket 3 is embedded in the partition groove 21. The thickness of the gasket 3 is the same as the thickness of the partition 2. Then, a protective film 4 is bonded to the upper and lower sides of the partition 2 to wrap the gasket 3 inside the partition 2, forming a strip 9 to be die-cut. The protective film 4 is a double-layer film structure. A transparent release paper 43 is coated on the side of the protective film 4 facing the partition 2. The bonding strength between the transparent release paper 43 and the protective film 4 is less than the bonding strength between the transparent release paper 43 and the partition 2 and the gasket 3. When an external force is applied to the protective film 4, the protective film 4 and the release paper 43 will separate preferentially.

[0039] During production, the pre-processed diaphragm 2 passes sequentially through the guide roller group 5. The first guide roller group 51 attaches the protective film 4 to the lower side of the diaphragm 2. Then, between the first guide roller group 51 and the second guide roller group 52, the gasket 3 is placed inside the dividing groove 21 on the diaphragm 2 by manual operation. The second guide roller group 52 then covers and attaches the protective film 4 to the upper side of the diaphragm 2, forming a wrapping and limiting of the gasket 3 inside the diaphragm 2. The material strip 9 is processed into a multi-layer composite structure and then conveyed to the third guide roller group 53 for rolling. This increases the bonding strength between the protective film 4 and the diaphragm 2 in the material strip 9 and improves the product quality after die-cutting.

[0040] Reference Figure 3 and Figure 4As shown, after the protective film 4 is laminated on the upper and lower sides of the diaphragm 2, a strip 9 is formed. The strip 9 is then die-cut into a heat insulation sheet of a specific shape by the die-cutting roller group 6. Specifically, several protruding blades are provided on the outer periphery of the die-cutting roller 61. By setting the depth of the blades, the strip 9 is cut to different depths, thus processing it into individual heat insulation sheets.

[0041] Reference Figure 5 The diagram shows the unfolded outer surface of the die-cutting roller 61. The die-cutting roller 61 can complete the die-cutting of three heat insulation sheets in one revolution on the surface of the material strip 9. The specific cutting method is as follows:

[0042] The outer periphery of the die-cutting roller 61 is provided with blade 1 611, blade 2 612, blade 3 613, blade 4 614, blade 5 615, and blade 616 respectively; wherein the material strip 9 opposite to the outer periphery of the die-cutting roller 61, such as Figure 6 As shown, the upper surface of the strip 9 is provided with a first cutting position 91, a second cutting position 92, a third cutting position 93, a fourth cutting position 94, a fifth cutting position 95, and a sixth cutting position 96, which correspond one-to-one with the blades on the outer periphery of the die-cutting roller 61.

[0043] Reference Figure 7 As shown, in order to facilitate efficient collection of the waste material 97 formed after die cutting, at both ends of the material strip 9, one end is kept flush with the diaphragm 2 and the protective film 4 covering both sides of the diaphragm 2, while at the other end the diaphragm 2 and the protective film 4 covering both sides of the diaphragm 2 are staggered. The protective film 4 on both sides of the diaphragm 2 protrudes from the diaphragm 2, and the end of the protective film 4 on the upper side of the diaphragm 2 protrudes from the end of the protective film 4 on the lower side of the diaphragm 2.

[0044] Specifically, the first cutting position 91, the second cutting position 92, the third cutting position 93, the fourth cutting position 94, and the fifth cutting position 95 on the surface of the material strip 9 are all completely cut through, as shown in the reference. Figure 8 As shown, for example, at the fourth cutting position 94, one side of the strip 9 is completely cut through. After cutting, waste material 97 is formed and is wound up by the waste material winding roller 73. The cutting states at the first cutting position 91, the second cutting position 92, the third cutting position 93, and the fifth cutting position 95 are the same as those at the fourth cutting position 94, only the cutting position and cutting direction are different. After cutting, the waste material 97 is wound up by the waste material winding roller 71.

[0045] Reference Figure 8As shown, at the sixth cutting position 96 of the strip 9, cutting is performed using blade 616. The depth of blade 616 must be greater than or equal to the sum of the thickness of the protective film 4, the thickness of one layer of release paper 43, and the thickness of the diaphragm 2. Blade 616 cuts to the top of the protective film 4 below the diaphragm 2, but not completely through it, resulting in waste material 97. Because the adhesive strength between the release paper 43 and the diaphragm 2 is greater than the adhesive strength between the release paper 43 and the protective film 4, the waste material 97 after cutting by blade 616 needs to be... After two winding processes, the waste material 97 can be completely collected. Specifically, the waste material 97 after being cut by blade six 616 is connected to the waste material 97 formed by blade one 611, blade two 612, blade three 613 and blade five 615 on the protective film 4 located on the upper side of the diaphragm 2, and is collected together by waste material winding roller one 71. Therefore, the remaining waste material 97 after being cut by blade six 616 is collected a second time by bonding with tape 8 and wound onto waste material winding roller two 72. In summary, the waste material 97 is completely collected.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A production apparatus for heat insulation sheets of new energy batteries, characterized in that, It includes a frame (1), several guide roller groups (5), a die-cutting roller group (6) and a diaphragm (2). The frame (1) is rotatably mounted with a protective film take-up roller one (41) and a protective film take-up roller two (42). The outer periphery of the protective film take-up roller one (41) and the protective film take-up roller two (42) is respectively wound with a protective film (4). The protective film (4) is rolled and bonded to the upper and lower sides of the diaphragm (2) by the guide roller group (5) to form a strip (9). The guide roller group (5) is continuously and intermittently arranged along the conveying direction of the diaphragm (2), and the die-cutting roller group (6) is located after the continuously arranged guide roller group (6) and is used for die-cutting the material strip (9).

2. The new energy battery heat insulation sheet production device according to claim 1, characterized in that, The diaphragm (2) is formed with several vertically penetrating dividing grooves (21) after being die-cut at the front end. The dividing grooves (21) are arranged side by side at intervals.

3. The new energy battery heat insulation sheet production device according to claim 2, characterized in that, It also includes a gasket (3), the size of which is adapted to the size of a plurality of partition grooves (21) so that the gasket (3) can be completely laid inside the partition grooves (21).

4. The new energy battery heat insulation sheet production device according to claim 3, characterized in that, The protective film (4) covers the upper and lower sides of the diaphragm (2) respectively, and can be attached to the upper and lower sides of the heat insulation sheet (3) in several partition grooves (31) for positioning.

5. The new energy battery heat insulation sheet production device according to claim 1, characterized in that, The guide roller groups (5) are all rotatably mounted on the frame (1), including the first guide roller group (51), the second guide roller group (52) and the third guide roller group (53). Each guide roller group (5) includes an upper pressure roller (54) and a lower pressure roller (55), with the upper pressure roller (54) located directly above the lower pressure roller (55).

6. The new energy battery heat insulation sheet production apparatus according to claim 5, characterized in that, The first guide roller group (51) can press the diaphragm (2) against the upper side of the protective film (4), the second guide roller group (52) can press the protective film (4) against the upper side of the diaphragm (2) and form a material strip (9), and the third guide roller group (53) can roll the material strip (9) to the die-cutting roller group (6).

7. The new energy battery heat insulation sheet production apparatus according to claim 6, characterized in that, The die-cutting roller assembly (6) is rotatably mounted on the frame (1) and includes a die-cutting roller (61) and a support roller (62). The support roller (62) abuts against the lower side of the protective film (4) on the lower side of the diaphragm (2). The die-cutting roller (61) is located directly above the support roller (62) and can die-cut the strip (9).

8. A new energy battery heat insulation sheet production apparatus according to claim 7, characterized in that, It also includes a waste take-up roller (7), which includes a first waste take-up roller (71), a second waste take-up roller (72) and a third waste take-up roller (73) which are rotatably mounted on the frame (1) for taking up waste.

9. A method for producing a heat insulation sheet for a new energy battery, characterized in that, The new energy battery heat insulation sheet production device as described in claims 1 to 8 is used for production.

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