A hot sealing mould for a small cover of a lead-acid storage battery

Abstract

A heat-sealing mold for a lead-acid battery cover includes a square base; a heat-sealing platform protruding upwards is provided on the square base; the upper surface of the heat-sealing platform is a heat-sealing surface; the size of the heat-sealing surface matches the position of the heat-sealing ribs inside the battery cover; a circular through hole is provided at the edge of the square base for fixed connection with heat-sealing equipment; multiple clearance holes are provided on the heat-sealing surface to avoid the liquid injection hole on the battery cover and clearance holes are provided to avoid the positioning post on the battery cover; a filter heat-sealing structure is provided on the heat-sealing surface at a position corresponding to the filter mounting hole on the cover for heat-sealing the filter simultaneously with the cover; the filter heat-sealing structure is an upwardly protruding annular flange or a downwardly recessed stepped hole adapted to the filter mounting hole on the cover. After the filter is installed on the cover, manual heat sealing is not required. The filter heat-sealing is performed simultaneously with the cover heat sealing process during battery formation, saving personnel and equipment for filter heat sealing and achieving cost reduction and efficiency improvement in battery production.

Description

Technical Field

[0001] This utility model belongs to the field of lead-acid battery manufacturing technology, specifically a heat-sealing mold for a small cover of a lead-acid battery. Background Technology

[0002] Lead-acid batteries with flooded electrolyte starters use gas filters. These filters are typically installed on the battery cover after injection molding, and then manually heat-sealed to secure them in the mounting holes to prevent them from falling out. Their function is to allow gases generated inside the battery to escape through the filter, preventing gas buildup that could lead to battery swelling and explosion, and also preventing internal acid mist from leaking out and corroding electrical equipment. Currently, heat-sealing the battery cover filter after installation requires a separate operation, specialized operators, and equipment, increasing battery production costs and time. Summary of the Invention

[0003] The purpose of this utility model is to provide a heat-sealing mold for lead-acid battery caps, which solves the problem that currently, after the filter is installed on the cap, it is necessary to have a dedicated operator to heat-seal the filter and to add heat-sealing equipment. After the filter is installed on the cap, there is no need for a dedicated person to perform manual heat sealing. The filter is heat-sealed at the same time as the cap heat-sealing process in the battery formation, so as to save the personnel and equipment for filter heat sealing and achieve cost reduction and efficiency improvement in battery production.

[0004] The technical solution of this utility model is: a heat-sealing mold for a lead-acid battery cover, including a square base; the square base is provided with an upwardly protruding heat-sealing platform; the upper surface of the heat-sealing platform is a heat-sealing surface; the size of the heat-sealing surface matches the position of the heat-sealing rib inside the battery cover; the edge of the square base is provided with a circular through hole for fixed connection with heat-sealing equipment; the heat-sealing surface is provided with multiple clearance holes one for avoiding the liquid injection hole on the battery cover and clearance holes two for avoiding the positioning post on the battery cover; the heat-sealing surface is provided with a filter heat-sealing structure at a position corresponding to the filter mounting hole on the cover for heat-sealing the filter while heat-sealing the cover; the filter heat-sealing structure is an upwardly protruding annular flange or a downwardly recessed stepped hole adapted to the filter mounting hole of the cover.

[0005] The height Hi of the annular flange is |(h-1)| mm; h is the height difference between the end face of the filter mounting hole before the small cover is heat-sealed and the end face of the heat-sealing rib of the small cover.

[0006] The total depth Di of the inner hole of the annular flange is greater than 6 mm.

[0007] The total depth Di of the inner hole of the annular flange is greater than the height Hi of the outer circle protrusion of the annular flange.

[0008] The outer diameter Dfo of the annular flange is more than 1.5 mm larger than the outer diameter Dao of the cover filter mounting hole, and the inner diameter Dfi of the annular flange is 1-2 mm smaller than the inner diameter Dai of the cover filter mounting hole.

[0009] The depth Dcb of the large step portion of the stepped hole is |(h-1)| mm; h is the height difference between the end face of the filter mounting hole before heat sealing of the small cover and the end face of the heat sealing rib of the small cover.

[0010] The depth Dcs of the small step portion of the stepped hole is greater than 6mm.

[0011] The inner diameter Dco of the larger step portion of the stepped hole is more than 1.5 mm larger than the outer diameter Dao of the cover filter mounting hole, and the inner diameter Dci of the smaller step portion is 1-2 mm smaller than the inner diameter Dai of the cover filter mounting hole.

[0012] The square base and the heat-sealing platform are made of iron or aluminum.

[0013] This invention enables automatic heat sealing of the filter sheet after it is installed on the small cover. Because the filter sheet heat sealing structure is set on the small cover heat sealing mold with an upward protrusion or downward depression, the filter sheet is heat sealed at the same time as the small cover heat sealing process after the filter sheet is installed on the small cover. This eliminates the manual heat sealing process of the filter sheet, reduces the number of personnel and heat sealing equipment, and ensures that the heat sealing effect meets the requirements. This effectively reduces manpower and increases efficiency in battery production, and lowers battery production costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 yes Figure 1 AA sectional view (annular flange 8).

[0016] Figure 3 yes Figure 1 AA section view (stepped hole 9).

[0017] Figure 4 This is a partial structural diagram of the small cover of a lead-acid battery (the surface of the filter mounting hole is lower than the heat-sealing rib surface of the small cover).

[0018] Figure 5 This is a partial structural diagram of the small cover of a lead-acid battery (the surface of the filter mounting hole is higher than the heat-sealing rib surface of the small cover). Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Please see Figures 1-5The small cover heat-sealing mold has a square structure and is made of iron or aluminum. A heat-sealing platform 2 protrudes upwards on the square base 1. The surface of the heat-sealing platform 2 is a hot plate heat-sealing surface 3, the size of which matches the position of the heat-sealing rib 01 inside the small cover 0. During the heat-sealing process, the small cover is pressed onto the hot plate heat-sealing surface 3 and melted, then fused together with the large cover. Circular through holes 4 are provided around the square base 1 to fix the small cover heat-sealing mold on the heat-sealing equipment. The heat-sealing surface has corresponding clearance holes, clearance hole one 5 and clearance hole two 6, to avoid the electrolyte injection hole and positioning post 03 on the battery small cover.

[0021] The heat-sealing cover 3 has a filter sheet heat-sealing structure 7 at a position corresponding to the filter sheet mounting hole 04 on the small cover, for heat-sealing the filter sheet 05 simultaneously with the heat-sealing of the small cover. The filter sheet heat-sealing structure 7 is either an upwardly protruding annular flange 8 or a downwardly recessed concentric circular stepped hole 9 that fits the filter sheet mounting hole 04 on the small cover, depending on the height difference between the surface of the filter sheet mounting hole and the heat-sealing rib surface of the small cover. If the surface of the filter sheet mounting hole is flush with or lower than the heat-sealing rib surface of the small cover (e.g....), the heat-sealing structure 7 will not be used. Figure 4 The filter heat-sealing structure 7 is an annular flange 8 (such as...). Figure 2 If the surface of the filter mounting hole is higher than the heat-sealing rib surface of the small cover (e.g.) Figure 5 The heat-sealing structure 7 of the filter element is a stepped hole 9 (e.g.) Figure 3 During the heat sealing of the small cover, the high temperature of the upper heating plate itself melts the PP material around the filter plate mounting hole, making the filter plate mounting hole and the surrounding area of ​​the filter plate fuse together.

[0022] When the surface of the filter mounting hole 04 is lower than the surface of the heat-sealing rib 01 of the small cover (e.g.) Figure 4 As shown in the figure, the height difference between the end face 5 of the filter mounting hole 04 and the end face 6 of the heat-sealing rib of the small cover before heat sealing is h (mm), and the height Hi of the annular flange 8 protruding from the heat-sealing surface 3 is set to |h-1| (mm). This ensures that the protruding surface of the stepped hole 8 on the heat-sealing mold platform 2 of the small cover can contact the surface of the filter mounting hole 04, achieving heat melting of the PP material on the surface of the filter mounting hole. The outer diameter Dfo of the annular flange 8 is more than 1.5mm larger than the outer diameter of the filter mounting hole 04 of the small cover, and the inner diameter Dfi of the annular flange 8 is 1-2mm smaller than the inner diameter of the filter mounting hole 04 of the small cover.

[0023] When the surface of the filter mounting hole 04 is flush with or higher than the surface of the heat-sealing rib 01 of the small cover (e.g.) Figure 5As shown), the height difference between the end face 5 of the filter mounting hole 04 and the end face 6 of the heat-sealing rib of the small cover before heat sealing is h (mm), and the depth Dcb of the large step portion 901 of the stepped hole 9 is set to |h-1| (mm). This ensures that the recessed surface of the large step portion 9 of the stepped hole 9 on the heat-sealing mold platform 2 can contact the surface of the filter mounting hole 04, achieving heat melting of the PP material on the surface of the filter mounting hole. The depth Dcs of the small step portion 902 of the stepped hole 9 is greater than 6mm. The inner diameter Dco of the large step portion 901 of the stepped hole 9 is more than 1.5mm larger than the outer diameter Dao of the filter mounting hole of the small cover, and the inner diameter Dci of the small step portion 902 is 1-2mm smaller than the inner diameter Dai of the filter mounting hole of the small cover.

[0024] With this configuration, after the filter sheet is installed on the small cover, the filter sheet is heat-sealed simultaneously with the heat-sealing process of the small cover. When the small cover is heat-sealed, it ensures that the PP material on the surface of the filter sheet mounting hole 04 is heat-melted, so that the filter sheet 03 and the filter sheet mounting hole 04 are heat-sealed as one. Since the center of the filter sheet heat-sealing structure is hollowed out, it also ensures that the central area of ​​the filter sheet is not heat-melted and loses its air permeability, thus ensuring the air permeability of the filter sheet.

Claims

1. A heat-sealing mold for a lead-acid battery cap, characterized in that: The device includes a square base (1); a heat-sealing platform (2) protruding upwards is provided on the square base (1); the upper surface of the heat-sealing platform (2) is a heat-sealing cover (3); the size of the heat-sealing cover (3) matches the position of the heat-sealing rib (01) inside the battery cover (0); a circular through hole (4) for fixed connection with the heat-sealing equipment is provided at the edge of the square base (1); a plurality of clearance holes (5) for avoiding the liquid injection hole on the battery cover and clearance holes (6) for avoiding the positioning post (03) on the battery cover are provided on the heat-sealing cover (3); a filter heat-sealing structure (7) for heat-sealing the filter (05) at the position corresponding to the filter mounting hole (04) on the cover is provided on the heat-sealing cover (3); the filter heat-sealing structure (7) is an upwardly protruding annular flange (8) or a downwardly recessed stepped hole (9) adapted to the filter mounting hole (04) on the cover.

2. The heat-sealing mold for the lead-acid battery cap according to claim 1, characterized in that: The height Hi of the annular flange (8) is |h-1| mm; h is the height difference between the end face of the filter mounting hole (04) and the end face of the heat sealing rib (01) of the small cover before heat sealing.

3. The heat-sealing mold for the lead-acid battery cap according to claim 2, characterized in that: The total depth Di of the inner hole (801) of the annular flange (8) is greater than 6 mm.

4. The heat-sealing mold for the lead-acid battery cap according to claim 2, characterized in that: The total depth Di of the inner hole (801) of the annular flange (8) is greater than the height Hi of the outer circle protrusion of the annular flange (8).

5. The heat-sealing mold for the lead-acid battery cap according to claim 2, characterized in that: The outer diameter Dfo of the annular flange (8) is more than 1.5 mm larger than the outer diameter Dao of the cover filter mounting hole, and the inner diameter Dfi of the annular flange (8) is 1-2 mm smaller than the inner diameter Dai of the cover filter mounting hole.

6. The heat-sealing mold for the lead-acid battery cap according to claim 1, characterized in that: The depth Dcb of the large step portion (901) of the stepped hole (9) is |h-1| mm; h is the height difference between the end face of the air filter mounting hole (04) before the small cover is heat-sealed and the end face of the heat-sealing rib of the small cover.

7. The heat-sealing mold for the lead-acid battery cap according to claim 4, characterized in that: The depth Dcs of the small step portion (902) of the stepped hole (9) is greater than 6mm.

8. The heat-sealing mold for the lead-acid battery cap according to claim 5, characterized in that: The inner diameter Dco of the large step part (901) of the stepped hole (9) is more than 1.5 mm larger than the outer diameter Dao of the cover filter plate mounting hole, and the inner diameter Dci of the small step part (902) is 1-2 mm smaller than the inner diameter Dai of the cover filter plate mounting hole.

9. The heat-sealing mold for the lead-acid battery cap according to claim 6, characterized in that: The square base (1) and the heat sealing platform (2) are made of iron or aluminum.

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