Hot press forming die for battery cell partition plate with buffer frame

Abstract

The utility model discloses a hot press forming mold for a battery cell partition plate with a buffer frame, and belongs to the technical field of battery cell partition plate processing. Comprising a lower die plate, a middle die plate and an upper die plate, the top and the bottom of the upper die plate and the bottom of the lower die plate are connected with hot pressing equipment, a connecting hole and a limiting groove are formed in the top of the lower die plate, and a connecting column matched with the connecting hole is arranged at the bottom of the upper die plate; the middle mold plate is of an axial symmetry structure and detachably installed in the limiting groove, and a limiting frame is further arranged on the middle mold plate. According to the technical scheme, the structure and the combination mode of the hot-press forming die are improved, the hot-press forming technological process is improved, and therefore the production efficiency is improved, the cost is reduced, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery cell separator processing, in particular to a hot-press forming die for a battery cell separator with a buffer frame. BACKGROUND

[0002] The battery cell separator with a buffer frame is a structure used for battery cell thermal runaway protection, expansion stress absorption and battery module external vibration impact reduction. The main functions of the battery cell separator with a buffer frame are heat insulation, buffering and protection of the battery cell, and sealing is achieved through a hot-press process during packaging. The battery cell separator with a buffer frame is usually designed in a cooperative manner of flexible support and sealing protection to meet the sealing, heat insulation and mechanical stability requirements of the battery cell separator with a buffer frame. This packaging method is widely used in the fields of power battery thermal protection, vehicle-mounted high-temperature component heat insulation, industrial equipment heat insulation and vibration reduction, and new energy equipment protection. In the hot-press bonding process of the battery cell separator with a buffer frame, the buffer frame is a functional component integrated into the aerogel heat insulation structure and is mainly used for mechanical buffering, sealing protection and structural support.

[0003] The silica gel frame belongs to a kind of buffer frame and provides buffering between battery cells through its high elasticity and flexibility, thereby reducing the influence of mechanical stress and thermal stress on the battery cells. The existing hot-press process combines PET or PI film with silica gel frame, aerogel core material and other materials to form a composite material battery cell separator with heat insulation and buffering functions. The specific process flow includes: mold preheating, taking out and opening the upper mold plate, assembling the bottom film, assembling the material placement jig, assembling the silica gel frame, assembling the core material, assembling the upper film, aligning and covering the upper mold plate, and placing the assembled mold into the hot-press equipment for hot-press forming. The hot-press forming die used in the process is assembled from an upper mold plate, a lower mold plate and a material placement jig made of 8-10 mm thick steel plate material. The entire process requires manual assembly of the upper mold plate, the lower mold plate and the material placement jig to link each process flow, which is time-consuming and labor-intensive. After the mold is preheated, the film material is assembled first and then the silica gel frame is assembled. However, the film material has adhesion, which makes it inconvenient to assemble the silica gel frame and reduces production efficiency. In addition, the mold is prone to deformation, and the equipment and mold are prone to wear, which leads to unstable product quality and increases production costs.

[0004] In view of the deficiencies of the hot-press forming die used in the forming process of the existing battery cell separator with a buffer frame, the technical solution of the present application is proposed. Practical new type content

[0005] The purpose of the present application is to provide a hot-press forming die for a battery cell separator with a buffer frame, which improves the structure and combination method of the hot-press forming die, improves the hot-press forming process, thereby improving the production efficiency, reducing the cost and improving the product quality.

[0006] The application provides a hot-pressing forming die for an electric core separator with a buffer frame, which adopts the following technical scheme: a lower die plate, a middle die plate and an upper die plate are arranged, the top and bottom of the upper die plate are connected with the bottom of the lower die plate through a hot-pressing device, the top of the lower die plate is provided with a connecting hole and a limiting groove, the bottom of the upper die plate is provided with a connecting column matched with the connecting hole, the middle die plate is an axis-symmetrical structure and can be detachably arranged in the limiting groove, and the middle die plate is further provided with a limiting frame.

[0007] By adopting the above technical scheme, the top and bottom of the upper die plate and the bottom of the lower die plate are directly fixedly connected with the hot-pressing device, and the preheating and opening and closing of the die plate are completed by means of the hot-pressing device, thereby eliminating the manual carrying of the die plate, the process steps of lifting and covering the upper die plate, and reducing the labor intensity of workers and the personnel safety hazards caused by the carrying process.

[0008] The material placing jig in the existing process is replaced by the middle die plate with an axis-symmetrical structure, that is, the upper end face of the middle die plate faces the limiting groove or is away from the limiting groove, and the middle die plate can be arranged in the limiting groove and cannot move in the horizontal direction. The specific product assembly process comprises the following steps: the middle die plate is taken out and placed on a table top, a silica gel frame is assembled in the limiting frame on the middle die plate, a core material is placed in the silica gel frame, a first layer of hot melt film is assembled on the upper surface of the middle die plate with the adhesive surface downward, the middle die plate is turned over so that the upper surface of the middle die plate faces downward, a second layer of hot melt film is assembled on the upward surface of the middle die plate with the adhesive surface downward, the product assembly is completed on the middle die plate, the first positioning hole of the assembled middle die plate is aligned with the positioning column of the lower die plate and is arranged in the limiting groove, and finally hot-pressing forming is performed. The process flow of preheating the die plate, then assembling the silica gel frame and then assembling the film material is realized, the inconvenience of assembling the silica gel frame in the existing process is avoided, and the production efficiency of the product hot-pressing forming is improved as a whole.

[0009] Optionally, the groove bottom of the limiting groove is provided with at least four positioning columns, and the middle die plate is provided with a first positioning hole matched with the positioning column.

[0010] By adopting the above technical scheme, in the assembly process of the application, the product assembly is completed on the middle die plate, and then the middle die plate is arranged and horizontally constrained in the limiting groove by means of the positioning column and the first positioning hole. In addition, when the hot melt film is assembled in alignment with the middle die plate, the hot melt film is on the inward side of the first positioning hole and the size does not exceed the first positioning hole, so that the product assembly is conveniently and quickly assembled.

[0011] Optionally, the outer edge of the middle die plate is spaced apart from the groove wall of the limiting groove by a thermal expansion space of 2 mm.

[0012] By adopting the technical scheme, the middle mold plate of the assembled raw and auxiliary materials is placed into the limiting groove, and after being aligned and sleeved with the positioning column, the outer edge of the middle mold plate is 2mm away from the groove wall on both sides of the limiting groove in thermal expansion space, so that the middle mold plate cannot be displaced in the horizontal direction, and meanwhile, the taking out of the middle mold plate after hot pressing is not affected. In addition, the first positioning hole is matched with the lower mold plate positioning column, and the axisymmetric structure of the middle mold plate realizes that both sides of the middle mold plate can be assembled with the lower mold plate positioning column.

[0013] Optionally, the number of the limiting frames is multiple.

[0014] By adopting the technical scheme, multiple limiting frames are arranged on the middle mold plate, so that the number of the cavities of the mold cavity is increased, multiple finished products are obtained by one hot pressing, and the production efficiency and the controllability of the product quality are improved.

[0015] Optionally, a core is arranged on the upper mold plate or / and the lower mold plate at a position corresponding to the limiting frame.

[0016] By adopting the technical scheme, the upper mold plate and the lower mold plate can be provided with a protruding protrusion as a core, and the core, the limiting frame, the upper mold plate and the lower mold plate constitute a mold cavity to hot-press the product assembly. The thickness of the hot-pressed finished product can be controlled by adjusting the specific size of the protrusion constituting the core, and the battery separator product meeting the specification requirements is obtained. Meanwhile, when the limiting frame is worn, the middle mold plate can be replaced to continue production, so that the product quality is ensured and the mold replacement cost is reduced.

[0017] Optionally, the top and the bottom of the upper mold plate are respectively provided with an upper screw hole and a screw rod counterbore, and the upper mold plate is locked with the hot-pressing equipment by means of the upper screw hole and the screw rod counterbore.

[0018] By adopting the technical scheme, the upper mold plate is thickened, and the upper screw hole and the screw rod counterbore are arranged on the top and the bottom of the upper mold plate, and then the upper mold plate is locked with the hot-pressing equipment by means of the bolt or the stud, so that the process step of lifting and covering the upper mold plate is completed by means of the hot-pressing equipment, which saves time and labor compared with manual handling. Meanwhile, the thicker upper mold plate also makes the mold deformation small during hot pressing, prolongs the service life, stabilizes the product quality, and reduces the production cost.

[0019] Optionally, the bottom of the lower mold plate is provided with a lower screw hole, and the lower mold plate is locked with the hot-pressing equipment by means of the lower screw hole.

[0020] By adopting the technical scheme, the lower die plate is thickened, a lower screw hole is arranged at the bottom of the lower die plate, and the lower die plate is locked with the ejection plate of the hot-pressing equipment through a bolt or a stud, so that the hot-pressing equipment is used to complete the process steps of assembling and carrying the hot-pressing die, which is more time-saving and labor-saving and safer than the manual carrying and assembling process. Meanwhile, the thicker lower die plate also makes the die less deformed during hot pressing, enhances the wear resistance, prolongs the service life of the die, improves the product quality, and reduces the production cost.

[0021] Optionally, the upper die plate is provided with a second positioning hole matched with the positioning column.

[0022] By adopting the technical scheme, the positioning column and the second positioning hole are additionally arranged on the basis of the connecting hole and the connecting column of the lower die plate and the upper die plate, so that the accuracy of the alignment of the upper die plate and the lower die plate during die closing is further improved, and the dimensional accuracy of the hot-pressing product is improved.

[0023] Optionally, opposite sides of the middle die plate are provided with outwardly extending handles.

[0024] By adopting the technical scheme, the installation, disassembly and self-turning between the die plate and the limiting groove during the hot-pressing process step are facilitated. In addition, the handles are arranged on the opposite sides, so that the operation is more labor-saving.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The upper die plate and the lower die plate are directly fixedly connected with the hot-pressing equipment, and the steps of lifting and covering the upper die plate are completed by means of the equipment, so that the link of manually carrying the die is reduced, the labor intensity is reduced, and the production efficiency is improved. By arranging a plurality of limiting frames on the middle die plate, the number of cavities of the die cavity is increased, so that a plurality of products can be produced in the same batch, and the production efficiency is further improved.

[0027] 2. By replacing the material placing jig with the middle die plate matched with the core arranged on the upper die plate or / and the lower die plate, and additionally arranging the positioning column, the first positioning hole and the second positioning hole on the basis of the connecting hole and the connecting column, the dimensional accuracy of the hot-pressing product is ensured, and the product quality is improved. The upper die plate and the lower die plate are thickened, so that the deformation during hot pressing is reduced, the wear resistance and stability of the die are enhanced, the rate of defective products and the replacement cost caused by die wear are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a first overall structure schematic view of a hot-pressing die for a battery core separator with a buffer frame;

[0029] Figure 2 is a second overall structure schematic view of a hot-pressing die for a battery core separator with a buffer frame.

[0030] Explanation of reference signs: 1, lower die plate; 11, limiting groove; 12, connecting hole; 13, positioning column; 14, lower screw hole; 2, middle die plate; 21, limiting frame; 22, first positioning hole; 24, handle; 3, upper die plate; 31, connecting column; 32, screw rod counterbore; 33, core; 34, upper screw hole; 36, second positioning hole. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying drawings. Figure 1 - the accompanying drawings Figure 2 The present application is further described in detail.

[0032] The embodiment of the present application discloses a hot-press forming die of battery cell separator with a buffer frame.

[0033] In combination with the accompanying drawings, Figure 1 As shown in the accompanying drawings, a hot-press forming die of battery cell separator with a buffer frame comprises a lower die plate 1, a middle die plate 2 and an upper die plate 3 arranged in sequence from bottom to top, the top and bottom of the upper die plate 3 are connected with the bottom of the lower die plate 1 respectively, and the hot-press equipment is connected, specifically, the upper die plate 3 and the lower die plate 1 are both thickened and arranged, the upper screw hole 34, the screw rod counterbore 32 and the lower screw hole 14 are arranged on the opposite surfaces of the two respectively, and then the upper die plate 3 is locked with the lifting die plate of the hot-press equipment and the lower die plate 1 is locked with the in-out die plate of the hot-press equipment by cooperating with bolts or studs (the hot-press equipment is not shown in the drawing), so that the process of lifting and covering the upper die plate 3 by means of the hot-press equipment is completed, the hot-press die is assembled and transported, time and labor are saved compared with manual transportation, and safety and efficiency are high.

[0034] The connecting hole 12 is arranged on the top of the lower die plate 1, and the connecting column 31 is arranged on the bottom of the upper die plate 3, which cooperates to play a guiding role when the hot-press forming die works, so as to improve the dimensional accuracy of the hot-press forming product.

[0035] The bottom of the limiting groove 11 is provided with four positioning columns 13, and the same position of the middle mold plate 2 is provided with four first positioning holes 22. Since the four positioning columns 13 are symmetrical in the left-right and front-rear directions, after the middle mold plate 2 is turned over, the positioning column 13 and the first positioning hole 22 are still aligned, and the upper surface or the lower surface of the middle mold plate 2 can be installed in the limiting groove 11 to continue the next process when the upper surface or the lower surface of the middle mold plate 2 faces downward.

[0036] As shown in Figure 1 , Figure 2 , as an embodiment of the present application, four positioning columns 13 are uniformly arranged at the bottom of the limiting groove 11, and four first positioning holes 22 are arranged at the same position of the middle mold plate 2. Since the four positioning columns 13 are symmetrical in the left-right and front-rear directions, after the middle mold plate 2 is turned over, the positioning column 13 and the first positioning hole 22 are still aligned, and the upper surface or the lower surface of the middle mold plate 2 can be installed in the limiting groove 11 to continue the next process when the upper surface or the lower surface of the middle mold plate 2 faces downward.

[0037] In the assembly process of the present application, after the product assembly is assembled on the middle mold plate 2, the middle mold plate 2 is installed and horizontally constrained in the limiting groove 11 by means of the positioning column 13 and the first positioning hole 22. In addition, when the hot melt film is assembled and aligned with the middle mold plate 2, since the hot melt film is on the inward side of the first positioning hole 22 and the size does not exceed the first positioning hole 22, the product assembly is conveniently and quickly assembled.

[0038] As another embodiment of the present application, on the basis of the axisymmetric structure of the positioning column 13 and the first positioning hole 22, the contour line of the outer edge of the middle mold plate 2 and the contour line of the limiting groove 11 are both provided with an axisymmetric structure, so that the outer edge of the middle mold plate 2 can be installed with the limiting groove 11 when the two surfaces of the outer edge are turned over, such as Figure 1 as shown in the rectangle, and others such as an ellipse are not shown in the figure.

[0039] As shown in Figure 1 , as an embodiment of the present application, two axisymmetric limiting frames 21 are arranged on the middle mold plate 2, and each limiting frame 21 corresponds to four core molds 33, so that the number of processable cavities of the cavity is increased to eight, greatly improving the production efficiency.

[0040] As Figures 1-2 shown, according to the specification size of the battery separator to be produced, the embodiment of the application adopts the upper die plate 3 and the lower die plate 1 to set eight protrusions protruding to the limiting frame 21 as the core 33; according to different products, it can also be used to set protrusions as the core 33 only on the lower die plate 1 or only on the upper die plate 3. By controlling the number and shape size of the core 33, the thickness and other shape sizes of the hot-pressing forming product are controlled to achieve the product specification required by production.

[0041] The hot-pressing forming mold of the battery separator with a buffer frame of the application improves the hot-pressing forming process by improving the structure and combination of the hot-pressing forming mold, thereby improving the production efficiency, reducing the cost, and improving the product quality. The hot-pressing forming processing steps are as follows:

[0042] First step: after the upper die plate 3 and the lower die plate 1 are centered and aligned, they are tightly locked on the hot-pressing equipment with a screw rod and are preheated;

[0043] Second step: remove the middle die plate 2 and place it horizontally on the desktop, and assemble the silica gel frame in the limiting frame 21;

[0044] Third step: place and assemble the aerogel core material in the silica gel frame;

[0045] Fourth step: assemble the first layer of hot melt film on the upper surface of the middle die plate 2, with the glue surface facing down and smoothing;

[0046] Fifth step: turn over the middle die plate 2, and assemble the second layer of hot melt film according to the fourth step;

[0047] Sixth step: align the first positioning hole 22 of the assembled middle die plate 2 with the positioning column 13 of the lower die plate 1 and install it in the limiting groove 11;

[0048] Seventh step: adjust the equipment parameters, start the hot-pressing equipment button to begin compression and forming, and complete the processing.

[0049] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A hot-press forming mold with a buffer frame cell separator, characterized in that: It includes a lower template (1), a middle template (2) and an upper template (3). The top and bottom of the upper template (3) are connected to the bottom of the lower template (1) respectively to a hot press device. The top of the lower template (1) is provided with a connecting hole (12) and a limiting groove (11). The bottom of the upper template (3) is provided with a connecting column (31) that cooperates with the connecting hole (12). The middle template (2) has an axisymmetric structure and the middle template (2) can be detachably installed in the limiting groove (11). The middle template (2) is also provided with a limiting frame (21).

2. The hot pressing mold with a buffer frame cell separator according to claim 1, characterized in that: The bottom of the limiting groove (11) is provided with at least four positioning posts (13), and the middle template (2) is provided with a first positioning hole (22) that matches the positioning posts (13).

3. The hot pressing mold with a buffer frame cell separator according to claim 2, characterized in that: The outer edge of the middle template (2) is 2mm away from the groove wall of the limiting groove (11) for thermal expansion space.

4. The hot pressing mold with a buffer frame cell separator according to claim 1, characterized in that: The number of the limiting frames (21) is multiple.

5. The hot pressing mold for a battery cell separator with a buffer frame according to claim 1, characterized in that: A core (33) is provided on the upper template (3) or / and lower template (1) at the position corresponding to the limiting frame (21).

6. The hot pressing mold for a battery cell separator with a buffer frame according to claim 1, characterized in that: The upper template (3) is provided with an upper screw hole (34) and a screw countersunk hole (32) at its top and bottom, respectively, and is locked with the lifting template of the hot press equipment by means of the upper screw hole (34) and the screw countersunk hole (32).

7. The hot pressing mold for a battery cell separator with a buffer frame according to claim 6, characterized in that: The bottom of the lower template (1) is provided with a lower screw hole (14), and is locked with the inlet and outlet template of the hot press equipment by means of the lower screw hole (14).

8. The hot pressing mold for a battery cell separator with a buffer frame according to claim 2, characterized in that: The upper template (3) is provided with a second positioning hole (36) that matches the positioning post (13).

9. The hot pressing mold for a battery cell separator with a buffer frame according to claim 1, characterized in that: The middle template (2) has outwardly extending handles (24) on its opposite sides.

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