Hot press forming die for half-packaged battery cell partition plate

Abstract

The utility model discloses a hot-press forming mold for a half-packaged battery cell partition plate, and belongs to the technical field of battery cell partition plate processing. Comprising a base, limiting blocks and an assembly positioning jig, limiting grooves with outward openings are formed in the two opposite sides of the base, the limiting blocks are installed in the limiting grooves, a first through groove is formed in the position, between the limiting blocks, of the base, and a cavity with an upward opening is formed by the first through groove and the limiting blocks. 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 simplified, the product quality is improved, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery cell separator processing, in particular to a hot-pressing forming die for semi-packaged battery cell separators. BACKGROUND

[0002] The battery cell separator is a structure used in a battery module, and its main functions are heat insulation and protection of the battery cell. Meanwhile, the battery cell separator is sealed through a hot-pressing process in the packaging process. In the forming and processing technology of the battery cell separator, semi-packaging refers to the long edge of the aerogel core material being coated, and the short edge being cut and trimmed after being attached, which belongs to a local covering packaging technology. This packaging method is widely used for heat insulation and protection between battery cells, and is particularly suitable for scenarios where part of the area needs to be reserved for connection or heat dissipation.

[0003] In the hot-pressing and attaching processing of the existing semi-packaged battery cell separator, a simple jig including a 18mm-thick wood jig, a 1mm-thick steel single-hole positioning jig and a material placing jig is usually used. The hot-pressing forming process steps are complicated, including: placing the wood jig horizontally → assembling the positioning jig down → assembling the bottom film → assembling the material placing jig → assembling the core material → removing the material placing jig → covering the edges evenly → assembling the positioning jig up → placing the assembled positioning jig and the covered product assembly into the hot-pressing equipment → hot-pressing forming and other processing procedures. However, the 1mm-thick positioning jig is prone to deformation during handling and hot-pressing forming, which makes the product quality unstable; the covering steps of the product assembly are too many, the entire process flow needs to be connected by manual assembly and jig handling, which is time-consuming and labor-intensive, and the production efficiency is low.

[0004] In view of the deficiencies of the existing semi-packaged battery cell separator in hot-pressing and attaching processing, the technical solution of the application is proposed. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the application is to provide a hot-pressing forming die for semi-packaged battery cell separators, which improves the structure and combination of the hot-pressing forming die, simplifies the hot-pressing forming process, improves the product quality and improves the production efficiency.

[0006] The hot-pressing forming die for semi-packaged battery cell separators provided by the application adopts the following technical solution: a base, a limiting block and an assembly positioning jig, opposite sides of the base are provided with limiting grooves opening outward, the limiting block is installed in the limiting groove, a first through groove is provided on the base between the limiting blocks, and the first through groove and the limiting block form a cavity with an upward opening.

[0007] By adopting the technical scheme, two limiting grooves with left opening and right opening are processed on the left side and the right side of the base, a first through groove is processed in the middle of the two limiting grooves and communicates the two limiting grooves, the depth of the first through groove is lower than the depth of the limiting groove, after the two limiting blocks are assembled into the limiting grooves, the upper edge of the limiting block is in the range from the groove bottom to the groove top of the first through groove, and an upward opening cavity surrounded by the two limiting blocks and the first through groove is formed.

[0008] The specific process includes that after the base and the limiting block are fixedly connected, the base and the limiting block are placed on the lower die plate of the hot pressing equipment and are preheated by the hot pressing equipment, then the assembled positioning jig is used to cover the product assembly in the manner of assembling the film material, assembling the core material and covering the wide edge first and then the narrow edge, the assembled product assembly is placed in the cavity, the equipment parameters are adjusted, and the hot pressing equipment is started to press and form.

[0009] Optionally, the base is provided with a plurality of cavities.

[0010] By adopting the technical scheme, the number of cavities for simultaneous hot pressing is increased, a plurality of products are obtained by hot pressing in the same batch, and the production efficiency is improved.

[0011] Optionally, an exhaust groove is arranged on the base between the cavities.

[0012] By adopting the technical scheme, the gas generated by the materials such as the hot melt film or the aerogel core material in the hot pressing process is discharged, air bubbles or bulges are prevented from being generated in the forming process, and the compactness and appearance quality of the product are improved.

[0013] Optionally, a limiting frame consistent with the size of the core material is arranged on the assembled positioning jig.

[0014] By adopting the technical scheme, the limiting frame is used to accurately place the aerogel core material at a specified position on the hot melt film, the effect of the existing material placing jig is achieved, the product assembly obtained by covering is matched with the size of the cavity, forming problems caused by position deviation are avoided, and the product quality is ensured. In addition, the design of the limiting frame enables the operator to place the aerogel core material in place more quickly, reduces the time for manual alignment and adjustment, simplifies the operation steps, and improves the production efficiency.

[0015] Optionally, a limiting convex rib is arranged on the assembled positioning jig outside the limiting frame.

[0016] By adopting the technical scheme, the worker can quickly and accurately place the hot melt film in place, the covering position and posture of the product assembly are more consistent with the help of the limiting frame, and the quality and consistency of the product are improved.

[0017] Optionally, the limiting convex rib is in an L shape.

[0018] By adopting the technical scheme, the limiting convex edge is set as an L shape, so that the size of the hot melt film is not restricted, and different specifications of the battery cell separator are adapted. Specifically, the size of the hot melt film required for coating the surface of the battery cell separator with different specifications is also different.

[0019] Optionally, a second through groove is arranged on the limiting block.

[0020] By adopting the technical scheme, the second through groove with a specific width is machined on the limiting block at the top end and the bottom end of the cavity, as a complementary structure of the cavity, to limit the width and the fitting position of the hot-pressed battery cell separator. Specifically, in the coating process of the present application, the wide side and the narrow side of the battery cell separator are wrapped with the hot melt film or other coating materials, but the top or the bottom may still be exposed for subsequent processing or connection with other components. The second through groove is arranged to press and form the uncoated top and bottom of the battery cell separator.

[0021] Optionally, a screw hole and a nut hole are respectively arranged on the limiting block and the limiting groove, and are connected and fixed by a bolt and a nut.

[0022] Optionally, a hand is arranged on the limiting block.

[0023] By adopting the technical scheme, the hand is arranged on the limiting block to facilitate the disassembly and assembly of the limiting block and the limiting groove.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. The design of the limiting frame and the limiting groove ensures the accurate placement of the aerogel core material and the hot melt film, avoids position deviation, improves the consistency and forming quality of the product; the exhaust groove arranged between the cavities exhausts the gas generated during the hot pressing process, prevents bubbles or bulges, and improves the compactness and appearance quality of the product; the L-shaped limiting convex edge and the limiting frame design reduces the time and error of manual alignment and adjustment, and further improves the product quality.

[0026] 2. The improved mold structure reduces the manual handling and assembly steps, simplifies the hot pressing process, and significantly improves the production efficiency; a plurality of cavities are arranged on the base, and a plurality of products can be formed at one time, which greatly improves the production batch and efficiency. The design of the limiting frame and the L-shaped limiting convex edge enables the operator to quickly place the material, reduces the alignment time, and improves the operation convenience. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure diagram of a hot pressing mold for a semi-encapsulated battery cell separator;

[0028] Figure 2 is Figure 1 a local enlarged view of a of a;

[0029] Figure 3 is Figure 1 a partial enlarged view of b of

[0030] Figure 4 is a structural schematic diagram of the assembly positioning jig.

[0031] Explanation of reference numerals: 1, base; 11, limiting groove; 12, first through groove; 13, exhaust groove; 14, nut hole; 2, limiting block; 21, second through groove; 22, screw hole; 23, buckle; 3, assembly positioning jig; 31, limiting frame; 32, limiting rib; 4, cavity. DETAILED DESCRIPTION

[0032] The following will be described in detail in combination with the accompanying Figure 1 - the accompanying Figure 4 The present application is further described in detail.

[0033] The embodiment of the present application discloses a hot-press forming die for semi-encapsulated battery cell separators.

[0034] In combination with Figure 1 shown, a hot-press forming die for semi-encapsulated battery cell separators, comprising a base 1, a limiting block 2 and an assembly positioning jig 3, the opposite sides of the base 1 are provided with outwardly opening limiting grooves 11, the limiting block 2 is installed in the limiting groove 11, and the base 1 between the limiting blocks 2 is provided with a first through groove 12, and the first through groove 12 and the limiting block 2 constitute a cavity 4 with an opening upward.

[0035] Specifically, two limiting grooves 11 with openings to the left and right are processed on the left and right sides of the base 1, and a first through groove 12 communicating the two limiting grooves 11 is processed in the middle of the two limiting grooves 11, as shown in Figure 2 The depth of the first through groove 12 is lower than the depth of the limiting groove 11, so that after the two limiting blocks 2 are assembled into the limiting groove 11, as shown in Figure 3 The upper edge height of the limiting block 2 is higher than the groove bottom of the first through groove 12 and lower than the groove top of the first through groove 12, forming an open upward cavity 4 surrounded by the two limiting blocks 2 and the first through groove 12.

[0036] As shown in Figure 1 As one embodiment of the present application, three cavities 4 are arranged and distributed on the base 1, and two exhaust grooves 13 are arranged at intervals between the three cavities 4, by increasing the number of cavities 4, multiple products are obtained by hot-pressing in the same batch, and the production efficiency is improved. At the same time, multiple exhaust grooves 13 are arranged to exhaust the gas generated by the hot-melt film or aerogel core material and other materials during the hot-pressing process, prevent bubbles or bulges from being generated during the forming process, and improve the compactness and appearance quality of the product.

[0037] As shown in Figure 4As shown, the assembly positioning jig 3 is provided with a limiting frame 31 consistent with the size of the aerogel core material, and a limiting protrusion 32 is arranged outside the limiting frame 31. With the limiting effect of the limiting protrusion 32, the worker abuts the hot melt film against the limiting protrusion 32, quickly and accurately places the hot melt film in place, and the aerogel core material is accurately placed on the specified position on the hot melt film according to the position of the limiting frame 31, thereby achieving the effect of the material placing jig in the existing forming process step. As a preferred embodiment of the present application, the limiting protrusion 32 is provided in an L shape. Since the length and width of the hot melt film are not limited by the limiting protrusion 32, hot melt films of different sizes can be selected, thereby achieving different coating effects on the surface of the battery separator, and different specifications of semi-encapsulated battery separators are formed.

[0038] It should be noted that the coating flush step of the semi-encapsulated battery separator hot press forming process of the present application includes: placing the aerogel core material in the limiting frame 31 of the assembly positioning jig 3; and sequentially and oppositely tensioning the hot melt film to coat the aerogel core material according to the customer's appearance requirements. The film material overlaps in the mold closing area, and the two ends form an open state, which is manifested as a narrow edge exposed. The narrow edge exposed refers to a part of the coating material at the narrow edge after the coating is completed, which exceeds the edge of the battery separator to form an exposed part, which is manifested as that the main body part of the assembled product assembly is placed in the cavity 4, but the top or bottom is exposed on the limiting block 2 outside the cavity 4. For this situation, as shown in Figure 2 A second through slot 21 of a specific width is arranged on the limiting block 2 as a supplementary structure of the cavity 4 to limit the width and fitting position of the main body part of the battery separator outside the hot press forming.

[0039] The working principle of the semi-encapsulated battery separator hot press forming die of the present application is as follows:

[0040] First step: lock the base 1 and the limiting block 2 with a screw rod through hole matching, and place it on the hot press equipment and preheat;

[0041] Second step: place the assembly positioning jig 3 flat, lay the hot melt film flat against the L-shaped limiting protrusion 32, and the glue surface faces upward;

[0042] Third step: place the aerogel core material in the limiting frame 31;

[0043] Fourth step: sequentially and oppositely tension the hot melt film to coat the aerogel core material according to the principle of wide edge first and narrow edge second, and the narrow edge is exposed;

[0044] Fifth step: place the coated product assembly into the cavity 4 of the base 1;

[0045] Sixth step: adjust the hot press equipment parameters, start the hot press equipment, and complete the processing.

[0046] The forming process of the semi-enclosed packaging battery separator replaces the thickened base 1 with a 20mm aluminum plate, and is tightly locked and fixed with the limiting block 2 on the hot pressing equipment, thereby saving manual handling; the number of cavities 4 is increased, the coating step is simplified, and the production efficiency is effectively improved; the feeding and discharging are convenient, the production cost is reduced, and the product quality is improved.

[0047] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A hot-press forming mold for a semi-encapsulated battery cell separator, characterized in that: The assembly includes a base (1), a limiting block (2), and an assembly positioning fixture (3). The base (1) has a limiting groove (11) with an outward opening on both sides. The limiting block (2) is installed in the limiting groove (11). A first through groove (12) is provided on the base (1) between the limiting blocks (2). The first through groove (12) and the limiting block (2) form an upward-opening cavity (4).

2. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 1, characterized in that: The base (1) is provided with multiple cavities (4).

3. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 2, characterized in that: An exhaust groove (13) is provided on the base (1) between the cavities (4).

4. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 1, characterized in that: The assembly positioning fixture (3) is provided with a limiting frame (31) that is the same size as the core material.

5. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 4, characterized in that: The assembly positioning fixture (3) on the outside of the limiting frame (31) is provided with a limiting protrusion (32).

6. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 5, characterized in that: The limiting protrusion (32) is L-shaped.

7. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 1, characterized in that: A second through groove (21) is provided on the limiting block (2).

8. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 1, characterized in that: The limiting block (2) and the limiting groove (11) are respectively provided with screw holes (22) and nut holes (14), and are connected and fixed by bolts and nuts.

9. The hot pressing mold for a semi-encapsulated battery cell separator according to claim 1, characterized in that: The limiting block (2) is provided with a handle (23).

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