How to weld 18650 battery?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

How to weld 18650 battery? Many factors affecting 18650 battery welding quality. Assembly from a lithium-ion battery to battery pack, battery welding is a very important manufacturing process. The electrical conductivity, strength, airtightness, metal fatigue and corrosion resistance of lithium-ion batteries is a typical indicator for evaluating battery welding quality.

18650 lithium-ion battery welding method and welding process will directly affect the cost, quality, safety and consistency of the battery. In various welding methods, laser welding has the following advantages: First, the laser welding energy density is high, the welding deformation is small, the heat affected zone is small, can effectively improve the accuracy of the workpiece. Welding is smooth, no impurities, uniform dense, don't give extra grinding.

Second, laser welding can be accurately controlled, small focus points, high positioning accuracy, easy to achieve automation of robotic arms, improve welding efficiency, reduce labor, reduce costs; additional, laser welding sheet or fine diameter wire is also like arc welding It is easy to affected by the fault. 1. Electromagnetic poles are made of nickel, which can be welded to WEWELDING88C welding wire and WEWELDING88C-F flux.

Welding Measures: Preheat the fixed head of the soldering iron, then coated the solder wire on the solder joint, and then support the soldering wire smelt molding. 2. If the ears are aluminum, use low temperature 179cm51 wire and M51-F flux.

Welding Measures: Preheat the fixed head of the soldering iron, then coated the solder wire on the solder joint, and then support the soldering wire smelt molding. Generally, the power lithium ion battery aluminum shell has a thickness of less than 1.0 mm.

At present, according to the battery capacity of mainstream manufacturers, the thickness of the shell material is 0.6mm and 0.8mm.

Welding approach is important to be soldered and top-welded, and the important advantages of lateral welding is that the internal impact on the battery is small, and the splash will not easily enter the outer casing. Since welding may result in expansion, this will have a slightly affecting subsequent assembly process, while welding process has higher requirements for laser stability, the material cleaning and matching gap is cap and aluminum shell power lithium-ion battery. However, since the top welding process is in a single surface, it can be used for more effective rumors scanning welding methods.

However, the automated requirements for the housing positioning and equipment of the front process are high. Note: 1. Welding strength:≥15, battery internal resistance increase, battery performance, short use time 2.

Spot welding appearance: no explosion, noble welding and extreme ear fall, no welding, concave point, deformed, explosion, etc. in the bottom of the housing; It is easy to rust; if it is welded, it will leak, and the battery will be scrapped.

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