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Application of soft-packed battery cell tab cutting

2024-12-06

In the manufacturing process of new energy batteries, tab cutting is a crucial process step. The accuracy and stability of tab cutting directly affects the performance, safety and life of the battery. This article will focus on the definition, application scenarios, key technical requirements and future development trends of tab cutting to unveil the mystery of this process for you.

What is soft-packed battery tab cutting?

Tab cutting refers to the process of cutting the metal conductive parts (i.e. tabs) extending from the positive and negative electrode sheets into specified shapes and sizes during the battery cell manufacturing process.

The role of the tabs: As the conductive medium connecting the battery core to the external circuit, the tabs carry the input and output of current.

The significance of cutting: The cutting process determines the shape, flatness and surface quality of the tabs, thereby affecting the conductive performance and welding effect of the battery core.

Main application scenarios for soft-packed battery cell tab cutting

The tab cutting process is widely used in the production of the following types of battery cells:

Cylindrical batteries: Commonly found in consumer electronics such as power tools and small energy storage devices.

Square batteries: used in high energy density scenarios such as electric vehicles and energy storage equipment.

Soft-pack batteries: With the advantages of high energy density and lightweight, they are widely used in new energy vehicles and consumer electronics.

Key technical requirements for cutting soft-packed battery cell tabs

During the tab cutting process, the following technical requirements need to be met:

High-precision cutting:

oThe size error of tab cutting needs to be controlled at the micron level to ensure conductive performance and consistency.

No burrs or flash:

oThe edges of the cut tabs should be smooth and flat to avoid short circuit or welding problems caused by burrs.

Efficiency and stability:

oMass production needs to ensure the cutting efficiency of thousands of cells per hour, and the stability of the equipment is crucial.
Material Compatibility:

oCutting equipment needs to adapt to the characteristics of different tab materials (such as aluminum foil, copper foil, nickel tape, etc.) to avoid material loss and stress concentration.

Common technical methods for cutting soft-packed battery core tabs

In the current industry, the following technologies are mainly used for tab cutting:

Mechanical punching:

Using molds for cutting is suitable for mass production, but the molds wear out quickly.

Laser cutting:

Non-contact cutting is achieved through high-energy laser beam, which is suitable for cutting complex shapes with high precision but high cost.

Ultrasonic cutting:

Use high-frequency vibration to reduce cutting force, reduce material deformation and thermal effects.

Supplier of soft-packed battery tab cutting equipment

Huiyao Laser Technology (Luoyang) Co., Ltd. is a professional battery production equipment supplier, committed to providing customers with high-precision battery testing equipment, efficient automated production line equipment and related technical services. We not only provide customers with soft-packed battery cell tab cutting equipment, but also cover battery module production lines, PACK assembly lines and other solutions to meet the diverse needs of the new energy field.

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