Process flow of soft pack lithium battery welding

Process flow of soft pack lithium battery welding

Under normal circumstances, it is not possible to solder the lithium battery directly with a soldering iron. Some people say that it is too low-level to scrape it with a sharp object to make the surface uneven and rough, and it is only suitable for people who are interested in playing. Especially the aluminum tabs of soft-packed lithium batteries cannot be welded with a soldering iron. There are currently two welding methods on the market, one is laser welding machine and the other is ultrasonic welding machine. Because of the high price and high consumables of laser welding machine, we will not discuss it this time, but it does not mean that it has no advantages at all. Let us understand how the ultrasonic lithium battery welding is welded.

Ultrasonic lithium battery welding machine is used for similar welding of metals, and can perform single-point and multi-point short strip welding on thin materials of copper, silver, aluminum, nickel and non-ferrous metals. It can be widely used for fuse-piece lithium batteries Welding of various shapes such as the lugs.

Ultrasonic lithium battery welding machine

ultrasonic metal spot welding machine adopts electronic program control, high power, high efficiency, automatic control, easy operation, built-in electronic protection circuit, safe use, stable and reliable work. Weldments have the characteristics of firm welding surface, high strength, subjectivity and environmental protection.

Requirements

Power supply voltage: 220V/10A1P 50HZ±5%

Compressor displacement: 0.1M/Min

Environment temperature: 0～40℃

Relative humidity: 35%～85%

Atmospheric pressure: 86～106Kpa

working principle

Welding principle:

During welding, the transducer converts the 20KHZ high-power vibration signal into the corresponding mechanical energy, which is applied to the contact interface of the metal parts to be welded. So as to achieve the welding effect.

Factors affecting welding quality:

When welding, it is necessary to apply the necessary pressure to the weldment, while strictly controlling the welding time and ultrasonic power. Pressure, time and power are the three elements to ensure welding quality.

Welding pressure: The purpose of applying pressure to the weldment is to form a relatively stable welding load for the acoustic component. Due to the static pressure applied to the weldment, the material contact surface of the weldment is good, so that more ultrasonic energy can be absorbed. So as to achieve the best results.

Lithium battery copper foil and aluminum foil welding machine

Welding time: Since the output power of the welding machine is constant, the energy obtained by the weldment is proportional to the time of ultrasonic action, so choosing the welding time is the key. Welding time is short, there will be false welding, welding time is long, resulting in weldment deformation. The welding time can be determined after several tests.