Laser welding machine in many industries need to be used, in recent years, the wave of new energy vehicles began to prevail in the world, and in the production of power batteries, an important process is the welding process. Among them, the power battery as a core component of new energy vehicles, directly determines the performance of the vehicle, the accuracy of the production equipment and automation level will directly affect the quality, efficiency and consistency of the battery, therefore, the new energy battery laser welding machine has become the new favourite of the power battery industry.

New energy power battery laser welding machine using the laser beam excellent directionality and high power density and other characteristics of the work, through the optical system will focus the laser beam in a very small area, in a very short period of time so that the welded place to form a highly concentrated energy heat source area, so that the welded material melts and form a solid weld and weld seam.

So, what are the advantages of laser welding machine applied in the field of new energy battery welding? Today to talk to you about the battery laser welding machine.

Laser welding power battery high energy density, welding deformation is small, small heat-affected zone, can effectively improve the precision of the parts, weld seam smooth without impurities, uniform and dense, without additional grinding work; because the structure of the power battery usually contains a variety of materials, so the power battery laser welding machine can be welded between dissimilar metals.

The main parts of the power battery to be welded are: shell, cell lugs, explosion-proof film, battery pack. Power battery cells can be divided into square, cylindrical, soft pack batteries, battery pack is a power source composed of multiple cells connected in series and parallel.

Laser welding machine welding technology can be used for: safety valve structure seal welding, cover seal welding, lead lug welding, lug collection welding, battery pack connection welding. With laser welding machine to weld these parts, the laser has a good absorption for their material, and laser welding heat affected zone is small, the weld joints weld beautiful, more solid welding, relatively safer.

The laser welding machine is applied to the automatic welding of cylindrical battery caps: it can realise the welding of 18650 and 14650 battery caps. The equipment adopts manual loading, automatic compression, welding and discharging, welding efficiency is faster, according to customer demand to achieve fully automatic loading and discharging, greatly increasing the welding efficiency, can also achieve a variety of specifications of the cylindrical battery welding versatility.

Laser welding machine applied to battery pole piece welding: semi-automatic loading, manual loading once can meet the needs of 3 hours. The equipment runs automatically, automatically grabs the pole piece and nickel piece, and combines the two together, which can realise automatic compression and welding, and automatically discharges the material after welding is completed, and then manually transfers the finished product to other places at one time.

Laser welding machine for power battery/super capacitor cover sealing welding: 1000W fibre laser with collimated focusing head to weld, manual loading, rotary duplex feeding, CCD image positioning system to assist positioning, x, Y, Z platform according to the positioning information to drive the collimated focusing head to move the trajectory, auto-focus, automatic welding. Connecting piece welding fixture, sealing bolt welding fixture, and shell welding fixture are mounted on the rotary platform, through the X, Y, Z platform to drive the collimated focusing head to move to achieve the conversion of the workstation, and can be achieved at the same time as the welding, loading and unloading, to improve production capacity.

Laser welding machine applied to power battery pack welding: the power cell welding line consists of several parts: loading line, primary inspection line, welding/inspection line, sorting line and discharging line. The loading line and the discharging line are of low height, which is convenient for manual picking and placing; the power battery cell enters into the primary inspection line through the loading line, and this station weighs and tests the power battery cell, and sorts the unqualified cells into the waste part; after that, the power battery is grasped by the electric gripper and put into the welding/inspection line, and this station can carry out pre-welding inspection, welding and welding quality inspection of the power battery cell; the power battery cell flows into the next station after welding is completed, and the sorting line and the sorting line are all composed of several parts. After welding, the battery cells flow into the next station, and the sorting station separates the qualified battery cells after welding.

The welding of power battery has more welding joints and high welding strength requirements, and the laser welding machine can fully meet the requirements of power battery welding, and the welding quality is guaranteed. In the process of electric welding, the stability of single-point energy has a great impact on the quality of welding. Welding power battery process is based on the power battery needs to be welded parts, in accordance with the development of a good track to move and complete the welding, through the relative movement of the torsion axis, along the welding material in order to complete the welding after the intermingling.