Aluminum wire ultrasonic welding was first used in microelectronics, power engineering and electronic industry. Because of its excellent conductivity, minimum loop resistance, high thermal fatigue working capacity and convenient production and manufacturing mode, it has been widely used to connect rechargeable batteries.

#Nico ultrasonic instruction manual#

What is the ultrasonic welding technology of aluminum wire

Aluminum wire ultrasonic welding is a kind of wire welding technology with aluminum wire as metal wire, and its key way is wedge welding. The key application of wedge welding is aluminum welding wire, which is generally carried out at indoor temperature. Wedge weld press in 2 wedge spot welds to produce a connection. Aluminum wire welding process is classified as ultrasonic wire welding. Only ultrasonic kinetic energy, working pressure and time shall be used to produce spot welding.

Basic principle of ultrasonic welding of aluminum wire

Aluminum wire ultrasonic welding technology is first based on ultrasonic metal welding technology, and is first used to weld metal wires in microelectronic technology machinery and equipment.

Basic principle of ultrasonic metal welding: ultrasonic metal welding is a unique way. It uses the vibration analysis kinetic energy of ultrasonic frequency (more than 16KHz) to connect the same or different metals. In the whole process of ultrasonic welding of metal, neither the amount of current is transported to the product workpiece, nor the high-temperature pyrogen is added to the product workpiece, but the vibration energy of welding machinery and equipment is converted into friction work and deformation energy, which limits the temperature rise in the middle of the product workpiece under static data. working pressure. The metallurgical industry fusion in the middle of the connector can complete the solid welding without melting the plate, so it can reasonably get rid of the splash and air oxidation caused by the whole process of resistor welding.

Ultrasonic metal welding machine can spot weld thin strips or plates of non-ferrous plate metals such as copper, silver, aluminum and nickel, and more welding and short strip welding. It can be used for welding and sampling of lithium battery pack.

In the aluminum wire ultrasonic welding machine and equipment, the most important is the ultrasonic system software. The software of ultrasonic system consists of two key parts: oscillating electromagnetic energy generator and ultrasonic transducer. The oscillating electromagnetic energy generator causes the oscillating electromagnetic energy of ultrasonic frequency, ultrasonic transducer and cutter. Install it in the mounting hole of the acoustic horn connected with the ultrasonic transducer, and introduce the metal electrode into the small round hole of the cutter. Tip over hose. During the whole welding process, a certain vertical working pressure is added above the cutter to make the metal electrode touch closely with the metal film of the product workpiece, resulting in ultrasonic frequency friction between the metal electrode and the metal film. Total number of products and workpieces to be welded. On the one hand, this kind of friction removes the metal electrode and the surface of the product workpiece. On the other hand, the air oxide layer and adsorption layer touching the film cause a lot of heat at the welding page, resulting in plastic deformation of the metal. Between the metal wire and the metal film of the weldment, and then produce a solid metallurgical industry integration in the metal. In the specific aluminum wire welding, the cutter and the product workpiece to be welded are generally heated at a certain temperature to improve the welding quality and wire welding efficiency.

Advantages of aluminum wire ultrasonic welding technology

The traditional fiber welding and arc welding technology have been used for many years, and there are some defects. For example, internal stress, cleaning problems after welding, lack of coordination ability and unable to manipulate quality. In these aspects, the performance of aluminum wire ultrasonic welding is improved, the traditional welding is good, and each welding part can be manipulated very well, which is not easy to cause all bad harm to the production process.

First, other traditional welding methods must be heated before metal melting, which is likely to destroy the negative aluminum shell of rechargeable battery. The temperature in the welding area is not easy to rise in the whole process of ultrasonic friction welding, which reasonably prevents the destruction of negative aluminum shell.

Second, in the whole process of resistor welding, the melting of metal raw materials will cause flames and pollutants, which is likely to change the stability of rechargeable batteries. The whole process of aluminum wire welding is relatively cleaned without all welding. After environmental sanitation cleaning.

Third, aluminum wire ultrasonic welding has excellent flexibility and strong compatibility, and can select the aspect ratio, stitch and working scope of aluminum wire. The aluminum wire welded with aluminum wire is the national standard specification and model, while the nickel, steel, copper and other connecting parts used in the traditional resistance welding machine must be opened again according to different structural commodities, which has significant advantages in economic cost and rationality. Cost.

Fourth, the metal wire can have excellent azimuth flexibility, and can manipulate the mismatch between various main parameters of thermal deformation. If common welding faults occur in the whole welding process, it is easy to inspect and repair the defective parts more easily. It will cause welding damage.

Fifth, in the whole process of aluminum wire connection, ultrasonic welding aluminum wire can be used as a fuse immediately.

Application of aluminum wire ultrasonic welding technology in pure electric vehicle power lithium battery industry

Since Tesla Motors first applied aluminum wire ultrasonic welding technology to complete the sequencing of 18650 rechargeable batteries in 2006, aluminum wire ultrasonic welding technology, which was first used in microelectronics and power electronics industry, has a new application. In the pure electric vehicle power lithium battery industry, a set of driving power lithium battery pack is composed of more than 100 or thousands of rechargeable batteries, especially cylindrical 18650 rechargeable batteries. How can countless rechargeable batteries ensure that the system software is still safe and can work normally under the condition of common short-circuit faults caused by separate rechargeable batteries. This provides for redundant technology for fuse protection for each rechargeable battery. According to the selection of aluminum wire with the main parameters of moderate current flow, it can not only be connected as switching power supply, but also have the effect of fuse, so as to ensure the completion of fuse protection under the condition of single battery short-circuit fault and over current flow, so that other batteries can be applied in parallel again, so as to ensure that the system software can operate again.

According to many years of working experience in the field, aluminum wire ultrasonic welding is a fusible connection technology, which is actively used to improve the safety factor of goods. At the same time, according to the liquid refrigeration and calorific value management methods, the cylindrical rechargeable battery can give full play to its great characteristics in the ideal natural environment. With the introduction of aluminum wire ultrasonic welding technology, the characteristics, safety factor and reliability of goods have been further improved, giving a large number of choices for the application of lithium batteries in different industries.