Lithium-ion battery battery, as the core component of electric vehicles, its performance directly affects the application of electric vehicles. For example, lithium-ion battery performance is related to alternative energy vehicle’s safety, range, energy density, power density, working-life, etc..
 

As the production and sales of alternative energy vehicles continue to climb, the lithium-ion battery industry also continues to benefit.

Laser welding, as a high precision welding method, extremely flexible, accurate and efficient, able to meet the performance requirements of the lithium-ion battery production process, has become the standard equipment of the lithium-ion battery production line.
 

Compared with traditional arc welding and electric resistance welding, laser welding has obvious advantages. For example, the welding joints are small and highly efficient, which makes it easy to automate the production of lithium-ion battery, while the yield rate of batteries is higher.

Lithium-ion Battery Laser Welding Applications

There are six main laser welding parts for lithium-ion battery.
 

They are the welding of the cover explosion-proof valve, the welding of the cell electrodes and pole, the welding of the battery shell, the welding of the sealing nail (electrolyte injection port), the welding of the cell electrodes, the welding of the cell electrodes and the top cover; in addition, the welding of the super capacitor is mainly based on the welding of the connecting piece and the negative electrode seal.

HGTECH is actively integrated into the alternative energy vehicle industry chain, and with years of experience in laser application, it has combined laser welding technology with automation and intelligent systems in lithium-ion battery manufacturing to create a complete set of laser processing solutions and related supporting facilities, including automatic sealing line for battery cell cover, automatic sealing line for liquid injection port, automatic welding system for pole pillar soft connection, explosion-proof valve welding system and automatic welding system for battery pack, etc.

HGTECH’s Solutions For Li-ion Battery

Liquid-filled hole laser welding machine

This machine is used for automatic nail welding of steel-cased lithium ion battery cells; it mainly consists of a loading system, a transit system, a motor turntable clamping system, a wiping system, a CCD correction, positioning and detection system, a seal nail loading system, a laser welding system, an unloading system, a cooling system and a dust removal system.

Machine features

- Uniqueness: fully automatic equipment consisting of auto loading, nail loading and unloading, with CCD correction, positioning and inspection, and 4 one-mould, two-hole fixtures on a DD motor rotary.

- High production efficiency: Imported vibrating mirror processing, single fixture with two lines welding simultaneously, single machine ppm ≥20.

- High Compatibility: line changes for different sizes of products.

- High stability: stable operation for 7*24 hours.

- Safe and environmentally friendly: no waste water discharge problems.

Fully automatic sealing nail system

This workstation is used for the production of square power battery sealing nail welding, which can realize the process of battery input, laser measurement of height, cover sweeping, laser cleaning, sealing nail loading, laser welding, post-welding inspection and battery output.

Machine features

- Battery vertical input, flow line conveying.

- Transit loading/unloading flow line, 2 to 4 channels for loading and 4 to 2 channels for unloading.

- Bind pallet QC code with battery QC code, enabling the sharing of height measurement and positioning information across all processes, enabling the traceability and management of battery information.

- Automatic sorting of OK/NG products.

- Communication with customer MES systems for automatic product data upload and trace.

Fully automatic top-cover system

This welding line is used for the production of laminated square power battery’s top cover and shell welding, mainly including laser pre-spot welding equipment and laser peripheral welding equipment.

Machine features

- Battery vertical input, flow line conveying, automatic code scanning.

- Dual channel design, welding head with two channels switching, higher laser utilization.

- Peripheral welding fiber + semiconductor compound laser welding, higher welding quality.

- Automatic sorting of OK/NG products.

- Automatic product data upload and traceability with customer MES system.

Soft package module welding line

This equipment is used for Core pack welding, with functions such as Core pack clamping and positioning, Core pack caching, pole bending, laser welding, weld appearance inspection and weld internal resistance inspection.

Machine features

- Core pack clamping and positioning, core pack cache, pole bending, laser welding, weld seam internal resistance detection, weld seam length and width detection.

- Core pack automatic code scanning, pallet RFID automatic code reading, and data binding with process information.

- Core pack automatic clamping function.

- Various types of NG material output functions, core pack anti-drop function, and protection for man-machine safety.

- Automatic discharge of the core pack into the water tank in case of fire/smoke in the welding station.

- Communication with the customer's MES system for automatic uploading and tracing of product data.

Automatic assembly and welding machine for soft pack modules

This welding machine is suitable for the assembly, welding and inspection of battery modules of different structures and sizes, such as soft pack modules.

Machine Features

- Automatic clamping of Core packs.

- Core pack automatic code scanning and data binding with process information.

- Complete set of processes such as Core pack clamping and positioning, loading, total positive and negative assembly, FPC installing, pre-solder CCD inspection, post-solder CCD inspection, internal resistance test etc.

- With all kinds of NG material output function and core pack anti-drop function, protection for man-machine safety.

- Automatic discharge into water tank while core pack soldering station fire/smoke

- Communication with the customer's MES system to automatically upload and trace product data.