Ultrasonic welding machine is a necessary equipment in the production and assembly process of power battery cells, which can be used in application scenarios such as lithium battery pole ear welding, PACK welding, composite current collector high-speed rolling welding, and nickel hydrogen battery positive electrode plate welding. Ultrasonic welding machines play an irreplaceable role in the multi-layer electrode ear welding process of lithium batteries. Compared to traditional welding methods, ultrasonic welding machines have advantages such as high efficiency, fast speed, no tin slag generation, and can maintain the original properties of materials, improving product quality and performance.
In addition, due to the fact that ultrasonic welding machines do not require a large amount of electricity and fuel, they also have advantages in energy conservation and emission reduction. The advantages and characteristics of ultrasonic welding equipment make it an important tool in the manufacturing of power batteries, which can improve production efficiency, product quality, and economic benefits.
Application methods
Ultrasonic welding is mainly used in the connection and assembly process of battery cells in the power battery industry. For example, in lithium batteries, ultrasonic welding can be used to connect positive and negative electrode ears, battery shells, and seals. In addition, ultrasonic welding can also be used in PACK welding to connect individual battery cells into a complete battery pack.
Process
The production process of ultrasonic welding in the power battery industry mainly includes the following steps:
(1)The selection of battery cells: Choosing the appropriate battery cells is the key to ensuring welding quality and efficiency. The thickness, material, surface condition, and other factors of battery cells can affect the welding effect.
(2)Preparation before welding: including preparation of tooling, calibration and debugging of tools, to ensure that no faults occur during the welding process.
(3)Welding process: Place the battery cells on the welding fixture and generate high-frequency vibration energy through an ultrasonic welding machine, causing micro friction between the metals between the battery cells, thereby achieving the purpose of connection.
(4)Quality control: After welding is completed, it is necessary to conduct visual inspection and performance testing on the battery cells to ensure that the welding quality and electrical performance meet the requirements.
quality and efficiency
Ultrasonic welding has the advantage of improving welding quality and reducing issues such as virtual soldering and short circuits in the power battery industry. By optimizing welding parameters and processes, welding efficiency and quality can be further improved. It should be noted that in practical applications, attention should be paid to the matching degree of battery cells and the wear of welding joints to avoid affecting welding quality and efficiency.
safety
The vibration and sound waves generated during ultrasonic welding may pose safety risks to operators and the equipment itself. Therefore, a series of safety measures need to be taken during the production process, such as installing sound insulation devices, isolating and warning signs in the operating area, etc., to ensure the safety of operators and equipment. In addition, qualified ultrasonic welding machines should have safety functions such as overload protection and over temperature protection, effectively avoiding equipment damage and accidents.
environmentally
The environmental friendliness of ultrasonic welding in the power battery industry is reflected in two aspects. Firstly, during the welding process, energy consumption and greenhouse gas emissions can be reduced as a result of not requiring a large amount of electricity and fuel. Secondly, during the product usage stage, due to the stability and reliability of ultrasonic welding, the battery failure rate and maintenance rate can be reduced, thereby reducing the generation of waste and its impact on the environment.
economy
The economic benefits of ultrasonic welding in the power battery industry are mainly reflected in the following aspects. Firstly, due to the high efficiency and quality stability of ultrasonic welding, it can reduce production costs and improve output efficiency. Secondly, ultrasonic welding can reduce manual participation and labor costs, and improve the level of production automation. Finally, ultrasonic welding can also improve the service life of products and reduce maintenance costs, thereby indirectly improving economic benefits.
Future development
With the continuous expansion of the new energy vehicle market and the continuous innovation of power battery technology, the future development prospects of ultrasonic welding in the power battery industry are broad. On the one hand, the continuous improvement of ultrasonic welding technology will enable it to play a greater role in the production of power batteries; On the other hand, new application areas and market demands will also provide broader space for the development of ultrasonic welding technology. Meanwhile, research on how to further improve the quality and efficiency of ultrasonic welding, reduce production costs, and enhance safety will also become an important direction for future development.
