About the Laser Welding Explosion Point of Lithium Battery

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• What is the laser welding explosion point?
• What impact does the explosion point have on lithium batteries?
• Cause analysis of burst point
• Burst point control measures

In laser welding, welding quality and efficiency have always been the focus of major lithium battery manufacturers. At the same time, the stability of equipment is also the key to battery production efficiency and quality.

At present, in the production of square aluminum shell batteries, the welding quality of the welding around the top cover is very critical to the impact of battery assembly production. At present, the best production efficiency can reach 99.5% (for square aluminum shell batteries, the thickness of the shell is 0.6 mm). But most of the time, it can only be maintained at about 97.5~98.5%. In actual production, the welding seam has the greatest impact on the quality of welds. And there are more explosion points and pinholes, followed by such as virtual welding, polarized light etc.

1,Description:

High precision lithium battery module laser welding machine has the gantry structure which can be welded in large format, and multiple sets of fixtures can be installed at the same time to weld various specifications and models of lithium battery modules.

Laser welding spot is fine, high penetration, small taper, high precision; welding surface effect is smooth and no bubbles.

The laser welding process is pollution-free, the heat affected zone is small, and the deformation is small. The water cooling system is adopted to ensure the life of the laser device.

High-definition CCD monitoring screen and red light positioning indicator make the software editing process easy and convenient.

Stable performance of industrial PC, welding system software operation is simple and easy to learn.

 

2,High precision lithium battery module laser welding machine technical parameter

 

Item

Specifications

Model

HY-w

Laser source

w

XYZ Travel

Customizable

R Axis

Optional, 360° rotation

Position Accuracy

±0.02mm

Repeatability Accuracy

±0.01mm

Motion Source

Servo motor

Max Speed

500mm/s

Cooling Method

Water cooling

Electricity Demand

Customizable

Laser Wavelength

nm

Observation Syatem

CCD system

Gas Protection

Optional, Argon, Nitrogen

Environmental Requirements

No vibration, interference and ventilation

Welding Penetration

0.1~3.0mm

Further reading:
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MOQ

1 set

 

3,Lithium Battery Machine Main parts:

High-precision galvanometer welding system can effectively ensure the accuracy of welding for high precision lithium battery module laser welding machine.

High precision lithium battery module laser welding machine has the gantry structure which can be welded in large format, and multiple sets of fixtures can be installed at the same time to weld various specifications and models of lithium battery modules.

High precision lithium battery module laser welding machine which has welding fixtures are customized according to customer drawings, with high precision.

High precision lithium battery module laser welding machine with CCD monitoring system, real-time monitoring, accurate positioning.

Dimensional drawing, the size of the worktable can be customized according to requirements

4,Application:
 

1. Welding of battery explosion-proof valve
 

High precision lithium battery module laser welding machine,The explosion-proof valve of the battery is a thin-walled valve body on the battery sealing plate. When the internal pressure of the battery exceeds the specified value, the valve body of the explosion-proof valve ruptures to prevent the battery from bursting. The safety valve has an ingenious structure, and this process requires extremely strict laser welding technology. Continuous laser welding can achieve high-speed and high-quality welding, and welding stability, welding efficiency and yield can be guaranteed.

 

2. Welding of battery tabs
 

High precision lithium battery module laser welding machine,The tabs are usually divided into three materials. The positive electrode of the battery uses aluminum material, and the negative electrode uses nickel material or copper nickel-plated material. In the manufacturing process of power batteries, one of the steps is to weld the battery tabs and poles together. In the production of the secondary battery, it needs to be welded with another aluminum safety valve. Welding must not only ensure the reliable connection between the tab and the pole, but also requires a smooth and beautiful weld.

 

3. Spot welding of battery poles
 

High precision lithium battery module laser welding machine,The materials used for the battery poles include pure aluminum tape, nickel tape, aluminum-nickel composite tape, and a small amount of copper tape. The welding of battery electrode strips generally uses pulse welding machines. Due to its good beam quality and small welding spot, QCW quasi-continuous lasers are suitable for high reflectivity aluminum strips, copper strips and narrow-band battery strips (polar strip width (Under 1.5mm) welding has unique advantages.

 

4. The power battery shell and the cover plate are sealed and welded
 

High precision lithium battery module laser welding machine,The shell materials of the power battery are aluminum alloy and stainless steel (stainless and acid-resistant steel). Among them, aluminum alloy is mostly used, generally aluminum alloy, and a few use pure aluminum. Stainless steel is a laser weldable material, especially 304 stainless steel, whether it is pulsed or continuous laser, it can obtain welds with good appearance and performance.

 

5. Power battery module and pack welding
 

High precision lithium battery module laser welding machine,The series and parallel connections between power batteries are generally completed by welding the connecting piece and the single battery. The positive and negative electrodes are made of different materials. Generally, there are two kinds of materials: copper and aluminum. Ultrasonic welding is usually used. Copper and copper, aluminum and aluminum are generally used. Using laser welding. Both copper and aluminum conduct heat very quickly and have a very high reflectivity to the laser. The relatively large thickness of the connecting piece requires a higher power laser welding.

 

5,Application Areas:
 

 

 

Lithium battery industry

3C Electronics Industry

Hardware industry

 

 

Aerospace industry

Automobile industry

Medical device industry

 

 

Energy, lighting,

building materials industry

Jewelry industry

PCB industry

 

6,Samples

 

Our company

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