Anti-stick material for battery heat seal plate
By designing multiple square structures on the heat-sealing plate, the problem of molten plastic adhesion during the hot-melt welding process of lead-acid batteries was solved, achieving higher welding quality and production safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUCHENG CAMEL PLASTIC PROD CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-26
AI Technical Summary
In the traditional lead-acid battery heat-sealing plate process, molten plastic tends to adhere to the smooth surface during the hot melt welding process, leading to poor welding, increasing production difficulty and safety hazards.
The heat-sealing panel is replaced with a multi-grid structure, with grooves formed between the grids. The material is aluminum alloy or other thermally conductive metal. The grid side length and depth are 0.5~1mm, the grid spacing is 0.5~1mm, the grid surface is flush and chamfered, and it is used for hot-melt welding with the battery compartment, large cover and small cover.
It effectively prevents molten plastic from sliding and adhering on the heat-sealing plate, reducing the welding defect rate and improving production efficiency and safety.
Smart Images
Figure CN224417796U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lead-acid battery production technology, specifically relating to a heat-sealing plate for anti-stick batteries. Background Technology
[0002] The lead-acid battery casing mainly consists of three parts: the battery case, the large cover, and the small cover. The battery case, large cover, and small cover are bonded together using hot-melt welding (the battery case, large cover, and small cover are held in a heat-sealing mold at 300-380℃ for 1-5 seconds, allowing the heat-sealed surfaces to melt and then quickly pressed together to bond them together). If the bonding is poor, acid leakage may occur during vehicle travel, leading to vehicle corrosion and even serious consequences such as personal injury.
[0003] The hot-melt welding of the battery case to the large cover and the large cover to the small cover requires upper and lower heat sealing plates and a heating plate. The upper and lower heat sealing plates are usually made of aluminum alloy or other thermally conductive metals, while the heating plate is usually made of high-temperature steel. The upper and lower heat sealing plates are tightly connected and bonded to the upper and lower surfaces of the heating plate, respectively. The heating plate has a heating device installed inside, which conducts heat to the upper and lower heat sealing plates.
[0004] When heat-melting the battery case to the large cover or the large cover to the small cover, the battery case and the large cover (or the large cover and the small cover) are first brought into contact with the lower heat sealing plate and the upper heat sealing plate at high temperature for a certain period of time under certain pressure. Then the upper and lower heat sealing plates are removed, and the heat-melted large cover and the battery case (or the large cover and the small cover) are pressed together to complete the heat-melting welding process of the battery case and the large cover (or the large cover and the small cover).
[0005] Our company, and indeed the entire industry, uses a smooth structure for the heat-sealing plates used in battery cases, meaning the contact surface between the heat-sealing plate and the battery case heat-sealing cover is smooth. During the hot-melt welding process, significant pressure is required to bring the heat-sealing plate into contact with the battery case. Under the high temperature of the heat-sealing plate, the heat-sealing cover begins to melt, creating a vacuum between the molten plastic and the heat-sealing plate under pressure. Simultaneously, the battery case is prone to deformation under high temperature and pressure, and the molten plastic can easily slide horizontally on the smooth heat-sealing plate. Therefore, when the heat-sealing plate is removed after the required melting time, the molten plastic on the battery case heat-sealing cover can easily adhere to it, causing poor welding between the battery case and the cover, and in severe cases, leading to battery leakage. Furthermore, the molten plastic adhering to the heat-sealing plate must be cleaned promptly, increasing the workload of production workers and creating safety hazards. Utility Model Content
[0006] The purpose of this utility model is to provide a heat-sealing plate for anti-stick batteries to address the above-mentioned shortcomings. This plate can not only reduce internal defect rates and customer complaints, improve product quality and production efficiency, but also accumulate design experience to guide the design and development of new tooling, thereby improving the company's design and development capabilities and adapting to the increasingly fierce competition in the lead-acid battery industry.
[0007] The technical solution of this utility model is: a heat-sealing plate for an anti-stick battery, comprising a heat-sealing panel and a heating plate that are tightly connected and bonded together, characterized in that: the heat-sealing surface of the heat-sealing panel is composed of multiple squares; grooves are formed between the squares.
[0008] The grid in the technical solution of this utility model has a side length of 0.5~1mm and a depth of 0.5~1mm.
[0009] In the technical solution of this utility model, the spacing between the squares is 0.5~1mm.
[0010] In the technical solution of this utility model, the upper surface of the grid is flush with the heat-sealing cover of the heat-sealing panel.
[0011] In the technical solution of this utility model, each edge of the upper surface of the grid is chamfered.
[0012] In the technical solution of this utility model, the shape of the heat-sealing panel and the heating plate is consistent with the shape of the heat-melting welding surface of the battery compartment, the large cover, or the small cover.
[0013] In the technical solution of this utility model, the area of the grid region is larger than the area of the hot-melt welding surface of the battery compartment, the large cover, or the small cover.
[0014] The heat-sealing panel described in the technical solution of this utility model is made of aluminum alloy or other thermally conductive metals.
[0015] The heating plate in the technical solution of this utility model is made of high-temperature steel; a heating device is provided inside the heating plate.
[0016] The grid described in the technical solution of this utility model is achieved by milling.
[0017] This invention, based on the existing battery heat-sealing plate consisting of a tightly connected heat-sealing panel and a heating plate, changes the heat-sealing surface of the heat-sealing panel from a smooth surface to a grid surface composed of multiple squares. Therefore, during the hot-melt welding process, after the heat-sealing surface of the heat-sealed body melts under heat and pressure, the groove mechanism at the corresponding position of the heat-sealing panel makes it difficult to form a vacuum between the molten material and the heat-sealing panel. In addition, the grid structure on the heat-sealing surface can prevent the molten material from sliding horizontally. Therefore, when the heat-sealing panel is removed after the hot-melt time is reached, the molten plastic on the heat-sealing surface of the heat-sealed body is not easy to adhere to the heat-sealing surface, which can solve the welding defects caused by material adhesion in traditional smooth surface heat-sealing panels.
[0018] This utility model features a simple structure and prevents molten plastic from adhering to the heat-sealing plate of the battery. It is mainly used for the heat fusion welding of the battery case and the large cover or the large cover and the small cover.
[0019] By performing special treatment on the heat-sealing plate of the battery compartment, the problem of molten plastic adhering to the heat-sealing plate during the hot-melt welding process of the traditional smooth surface battery compartment heat-sealing plate is solved. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model.
[0021] Figure 2 for Figure 1 A magnified view of a portion of the image.
[0022] Appendix: 1-Heat-sealed panel; 2-Grid. Detailed Implementation
[0023] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.
[0024] like Figure 1 , Figure 2As shown, one embodiment of the anti-stick battery heat-sealing plate of this utility model is composed of a heat-sealing panel 1 and a heating plate that are tightly connected and bonded together, wherein the shape of the heat-sealing panel 1 and the heating plate is consistent with the shape of the hot-melt welding surface of the battery compartment.
[0025] The heat-sealing panel 1 consists of multiple squares 2, with grooves formed between the squares 2. The squares 2 are evenly arranged, with a side length of about 0.5~1mm, a depth of about 0.5~1mm, and a spacing of about 0.5~1mm between the squares. Each edge of the square surface should be chamfered, and the upper surface of the square should be flush with the surface of the heat-sealing plate.
[0026] The area of the grid 2 region should be larger than the area of the hot-melt welding surface of the battery compartment to ensure that the heat-sealing surface of the battery compartment is in full contact with the grid 2 structure during hot-melt welding.
[0027] Square 2 is machined using a milling cutter, and the edges of the upper surface of Square 2 are chamfered. Square 2 can also be achieved using machining methods other than milling.
[0028] The heat-sealing panel 1 is made of aluminum alloy, but can also be made of other thermally conductive metals besides aluminum alloy. The heating plate is made of high-temperature steel and contains a heating device.
[0029] During the hot-melt welding process, after the heat-sealed surface of the battery compartment melts under heat and pressure, the molten material is not easily vacuumed between the heat-sealed panel 1 and the corresponding position due to the groove mechanism. In addition, the grid structure 2 on the heat-sealed panel 1 can prevent the molten material from sliding horizontally. Therefore, when the heat-sealed panel 1 is removed after the hot-melt time is reached, the molten plastic on the heat-sealed surface of the battery compartment is not easy to adhere to the heat-sealed panel 1, which can solve the welding defects caused by material adhesion in traditional smooth surface heat-sealed panels.
[0030] The shapes of the heat-sealing panel 1 and the heating plate can also be consistent with the shapes of the hot-melt welding surfaces of the large cover and the small cover, for hot-melt welding between the large cover and the small cover.
Claims
1. An anti-stick material battery heat-seal plate comprising a heat-seal face plate (1) and a heating plate closely connected and fitted together, characterized in that: The heat-sealing panel (1) has a heat-sealing surface composed of multiple squares (2); grooves are formed between the squares (2).
2. The anti-stick battery heat-sealing plate according to claim 1, characterized in that: The square (2) has a side length of 0.5~1mm and a depth of 0.5~1mm.
3. The anti-stick battery heat-sealing plate according to claim 2, characterized in that: The spacing between the squares (2) is 0.5~1mm.
4. The anti-stick battery heat-sealing plate according to claim 3, characterized in that: The upper surface of the square (2) is flush with the heat-sealed cover of the heat-sealed panel (1).
5. The anti-stick battery heat-sealing plate according to claim 4, characterized in that: The edges of the upper surface of the square (2) are chamfered.
6. A heat-sealing plate for an anti-stick battery according to any one of claims 1-5, characterized in that: The shape of the heat-sealed panel (1) and the heating plate is consistent with the shape of the heat-melted welding surface of the battery compartment, the large cover or the small cover.
7. A heat-sealing plate for an anti-stick battery according to claim 6, characterized in that: The area of the region where the square (2) is located is greater than the area of the hot-melt welding surface of the battery compartment, the large cover, or the small cover.
8. A heat-sealing plate for an anti-stick battery according to any one of claims 1-5 and 7, characterized in that: The heat-sealing panel (1) is made of aluminum alloy or other thermally conductive metals other than aluminum alloy.
9. A heat-sealing plate for an anti-stick battery according to any one of claims 1-5 and 7, characterized in that: The heating plate is made of high-temperature steel; a heating device is installed inside the heating plate.
10. A heat-sealing plate for an anti-stick battery according to any one of claims 1-5 and 7, characterized in that: The square (2) is achieved by milling.