The role of Hot-melt adhesive machine in the production of lead-acid batteries

Lead-acid batteries are one of the oldest and most widely used energy storage devices, with applications ranging from automotive to electric grid. They are made from abundant low-cost materials and have a high recycling rate, making them environmentally friendly. However, they also face some challenges, such as low energy density, corrosion, and structural changes of the active materials during cycling. In this article, we will explore how hot-melt adhesive machines can help improve the performance and efficiency of lead-acid batteries.

What is a hot-melt adhesive machine?

A hot-melt adhesive machine is a device that dispenses heated resin or epoxy onto a surface, creating a strong bond between different materials. The resin or epoxy is usually stored in a tank or drum and melted by electric heaters. The molten adhesive is then pumped through hoses and applicators to the desired location. The adhesive solidifies quickly upon cooling, forming a durable seal.

Hot-melt adhesive machines are widely used in various industries, such as packaging, furniture, woodworking, hygiene, medical, electronics, and e-mobility. They offer several advantages over other types of adhesives, such as:

• Fast curing time and high productivity

• Low cost and easy maintenance

• High strength and flexibility

• Resistance to water, heat, and chemicals

• No solvents or VOCs (volatile organic compounds)

How can hot-melt adhesive machines improve lead-acid batteries?

Hot-melt adhesive machines can be used to apply resin or epoxy onto the electrodes and grids of lead-acid batteries, enhancing their mechanical stability and electrical conductivity. This can help prevent corrosion, reduce internal resistance, and increase material utilization.

For example, a hot-melt adhesive machine can be used to coat the positive electrode grids with epoxy resin, which can protect them from oxidation and sulfation. This can extend the battery cycle life and improve the charge acceptance. Moreover, the epoxy resin can fill the pores and cracks of the grids, increasing their mechanical strength and reducing their weight.

Another example is to use a hot-melt adhesive machine to bond the negative electrode grids with lead paste, which can improve the contact between the active material and the current collector. This can reduce the internal resistance and increase the power output of the battery. Furthermore, the lead paste can act as a buffer layer to accommodate the volume changes of the active material during cycling, preventing cracks and peeling.

Hot-melt adhesive machines can also be used to seal the battery case with resin or epoxy, which can prevent leakage and improve safety. Additionally, hot-melt adhesive machines can be used to attach labels or tags to the battery case, providing information such as model number, date of manufacture, and warranty.

What are some examples of hot-melt adhesive machines for lead-acid batteries?

There are many types of hot-melt adhesive machines for lead-acid batteries, depending on the size, shape, and capacity of the batteries. Some examples are:

• Hot-melt adhesive dispensing systems: These are systems that consist of a tank or drum, a pump, hoses, applicators, controllers, and verification devices. They can dispense hot-melt adhesives in various patterns and volumes according to the battery specifications. For example, Nordson offers a range of hot-melt adhesive dispensing systems for different applications.

• Hot-melt glue applicators: These are devices that apply hot-melt glue onto a surface using pneumatic pressure or piezo-based jetting technology. They can control the glue temperature, flow rate, and dot size according to the battery requirements. For example, Nordson offers MiniBlue II hot melt glue applicator and Vulcan Jet dispensing systems  for precise and fast application of hot-melt glue.

• Hot-melt resin epoxy dispensing machines: These are machines that are specially designed for applying resin or epoxy onto lead-acid battery electrodes or grids. They can edit gluing track according to battery dimension and adjust gluing quantity accurately. They are usually equipped with automatic conveyor belts for high efficiency. For example, Better Power offers a lead acid battery hot melt resin epoxy dispensing machine that can be applied at two stations simultaneously.

Conclusion

Hot-melt adhesive machines are useful tools for improving the performance and efficiency of lead-acid batteries. They can apply resin or epoxy onto various parts of the battery, such as electrodes, grids, case, labels, etc., creating strong bonds between different materials. This can help prevent corrosion, reduce internal resistance, increase material utilization, prevent leakage, improve safety, and provide information. Hot-melt adhesive machines are fast, low-cost, easy to maintain, and environmentally friendly.