With the rapid development of electric vehicles and energy storage technologies, the prismatic battery module, as a key component among them, its production efficiency and quality have become the focus of attention in the industry. In the production process of the prismatic battery module, the connection technology of busbar (bus bar) and CCS (Cell Contact System) is particularly crucial. This article will popularize the concepts and differences of busbar and CCS, and why laser welding technology is selected, and explore its advantages.
I. The concepts and differences of busbar and CCS
II. Busbar, that is, the bus bar, is a metal strip used to connect the cells in series or in parallel in the battery module. It carries the transmission of current and is an important part of the internal current path of the battery module.
While CCS (Cells Contact System), that is, the integrated bus bar, is a more advanced battery module connection technology. CCS not only realizes the series and parallel connection of the cells, but also integrates functions such as temperature sampling and voltage sampling. Through signal acquisition components such as FPC (flexible circuit board) or PCB (printed circuit board), it provides real-time data for the BMS (battery management system).
The main difference between busbar and CCS lies in the degree of integration and functions. Busbar mainly undertakes the function of current transmission, while CCS integrates more functions on this basis, such as temperature sampling and voltage sampling, making the management of the battery module more intelligent and efficient.
III. Why choose laser welding technology
In the production process of the prismatic battery module, the connection technology of busbar and CCS is crucial. Traditional connection methods such as welding and riveting can achieve the connection, but there are problems such as low efficiency and insufficient accuracy. And laser welding technology, with its unique advantages, has become the preferred technology in modern battery module production.
Laser welding technology uses a high-energy-density laser beam as the heat source to melt and connect metals. Compared with traditional welding technology, laser welding has the following several significant advantages:
Efficiency: Laser welding is fast and can complete a large amount of connection work in a short time to improve production efficiency.
Accuracy: The focused spot of laser welding is small, which can achieve high-precision positioning and ensure the connection quality.
Environmental friendliness: No additional materials are required in the laser welding process, reducing the pollution to the environment.
Adaptability: Laser welding can weld a variety of materials, including stainless steel and aluminum alloy, to meet the different needs of the battery module.
IV. The advantages of laser welding on the automated production line
With the continuous development of automation technology, the automated production line of prismatic battery modules has become the mainstream in the future. On the automated production line, laser welding technology has played a huge role.
First of all, laser welding technology can be perfectly integrated with the automated production line to realize a highly automated production process. Through robots and automated equipment, the laser welding equipment can be accurately controlled to realize automated loading and unloading, positioning, welding and other operations, improving production efficiency and product quality.
Secondly, laser welding technology can reduce human intervention and the possibility of human errors. On the automated production line, the laser welding equipment can accurately control the welding parameters and the welding position, avoiding the errors and uncertainties in manual operations.
Finally, laser welding technology can also reduce the production cost. By improving production efficiency and product quality, reducing the scrap rate and rework rate, thereby reducing the production cost. At the same time, the service life of the laser welding equipment is long and the maintenance cost is low, further reducing the production cost.
To sum up, laser welding technology has significant advantages on the automated production line of prismatic battery modules. With the continuous development of electric vehicles and energy storage technologies, laser welding technology will play an increasingly important role in battery module production. In the future, we have reason to believe that the automated production line will become the mainstream trend of battery module production.
