Application of laser welding technology in the manufacture of soft battery

With the rapid development of new energy vehicles, lithium batteries, as an important power source, have also been widely used. Among them, as a new form of lithium battery, the soft pack battery has advantages such as lightweight, flexible, and safe, gradually becoming the mainstream of the lithium battery market. In the manufacturing process of soft battery, laser welding technology, as an important means, has also been widely used. This paper will introduce the application of laser welding technology in the manufacture of soft battery from four aspects: soft battery, laser welding technology of soft battery, laser welding machine and power battery.

Soft pack battery
1、 Overview of Soft Pack Batteries
A soft pack battery is a battery composed of multiple individual cells, with an outer layer made of flexible materials, which is lighter, thinner, more flexible, and safer than a hard shell battery. Soft pack batteries are mainly used in mobile power sources, electric tools, electric motorcycles, electric bicycles, drones, and other fields, and are also an important power source for new energy vehicles.

Soft pack batteries are considered one of the mainstream products in the lithium battery market due to their high energy density, high safety, and long lifespan. Among them, the application of laser welding technology in the manufacturing of flexible battery is also constantly promoting the development of flexible battery manufacturing technology.

2、 Laser welding technology of soft battery
Laser welding technology is a kind of welding technology with high precision and efficiency. In the manufacturing process of flexible battery, laser welding technology is mainly used in the manufacturing and connection of single cell and the manufacturing of battery shell. The application of laser welding technology in the manufacture of flexible battery has the following advantages:

1. High efficiency
Laser welding technology can realize non-contact processing and improve production efficiency. At the same time, because the weld of laser welding is very small, it can reduce the loss of materials and improve the utilization rate of materials.

2. High precision
Laser welding technology can achieve high-precision welding, and the position and size of welding points can be precisely controlled. At the same time, laser welding technology can control the micro deformation and thermal damage of materials, and ensure the quality and stability of products in the welding process.

3. High reliability
Laser welding technology can achieve very high welding strength of welding points, which can greatly improve the reliability and stability of products. At the same time, laser welding technology can avoid quality problems such as porosity and oxidation during welding.

Soft pack battery

3、 Application of laser welding machine
Flexible battery laser welding machine is a kind of equipment specially used for manufacturing flexible battery, which can realize the manufacturing and connection of single battery and the manufacturing of battery shell. The application of laser welding machine in the manufacture of soft battery mainly includes the following aspects:

1. Cell manufacturing and connection
The single battery in the flexible battery needs to be connected through the laser welding machine to realize the manufacturing of the battery cell. In this process, the laser welding machine can realize the fast connection of the single battery and improve the production efficiency and consistency through the efficient and high-precision working mode.

2. Shell manufacturing
The shell of the flexible battery is usually made of aluminum foil or other composite materials, and the processing and connection of these materials also need to use laser welding technology. Laser welding machine can provide high efficiency and high precision welding mode in shell manufacturing to realize shell manufacturing and connection.

3. Manufacturing of battery cell liners
The cell in the flexible battery needs to be fixed in the internal bushing, and this process also requires the use of laser welding technology. The laser welding machine can realize the precise trimming and connection of the electric core bushing, which improves the product quality and production efficiency.

4. Connection between battery cell and BMS (Battery management system)
The battery cells in the soft pack battery need to be connected to the BMS to achieve battery management and control. This process also requires the use of laser welding technology. The laser welding machine can realize the accurate connection between the electric core and BMS, and improve the reliability and stability of the product.

4、 Application of laser welding technology in power battery manufacturing
Laser welding technology can be used not only in the manufacture of soft battery, but also in the manufacture of power battery. As one of the core components of new energy vehicles, the manufacturing and connection quality of power batteries have a crucial impact on the performance and safety of vehicles. The application of laser welding technology in power battery manufacturing can achieve high efficiency, high precision and high reliability welding, and improve the quality and stability of products.

Hiwei laser soft pack battery laser welding machine

5、 Summary on laser welding of soft battery
The application of laser welding technology of flexible battery in lithium battery manufacturing has become a trend. The application of Hiwei laser flexible battery laser welding machine in the manufacturing of flexible battery can improve production efficiency, reduce material loss, and improve the quality and stability of the battery. At the same time, the laser welding machine can control the micro deformation and thermal damage of materials. In the future, with the expansion of the new energy lithium battery market, the laser welding machine will be more widely used in the manufacture of lithium batteries.

Source: Haiwei Laser