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Prismatic Battery Sealing Pin Laser Welding Machine
Our prismatic battery sealing pin laser welding machine is designed to weld aluminum sealing pins onto the filling ports of prismatic battery top covers, ensuring hermetic sealing. This EV battery seal pin welder automates cell loading, galvanometer laser cleaning of the filling port, sealing pin feeding, laser welding, and then transfers sealed cells to the next process. As a complete battery filling port laser sealing system, it achieves ±0.1mm cell positioning accuracy, ±0.05mm pin positioning accuracy, and ≤±3% laser power stability – delivering reliable, leak‑free seals.
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What Is a Prismatic Battery Sealing Pin Laser Welding Machine?
A prismatic battery sealing pin laser welding machine is the final laser welding station in prismatic cell assembly. After electrolyte filling through the filling port, a small aluminum sealing pin must be welded over the port to permanently seal the cell. Any leakage can cause electrolyte loss, moisture ingress, and premature battery failure. Our machine automates this critical process, ensuring consistent, high‑quality seals for EV, ESS, and consumer prismatic cells.
EV Battery Seal Pin Welder – Working Principle & Key Features
This EV battery seal pin welder operates in a fully automatic sequence:
Automatic cell loading – Cells are transferred from the previous process (electrolyte filling) via conveyor.
Galvanometer laser cleaning – The filling port area is cleaned to remove any electrolyte residue or contaminants, ensuring weld quality.
Sealing pin feeding – Aluminum pins are automatically picked and placed over the filling port with high precision.
Laser welding – A pulsed or fiber laser welds the pin to the top cover, creating a hermetic seal.
Unloading – Sealed cells are transferred to the next process (leak testing or formation).
Key features:
Galvanometer scanner for fast, precise laser cleaning.
High‑precision pin placement – ±0.05mm positioning accuracy.
Stable laser output – Power fluctuation ≤±3% ensures consistent weld penetration.
Adjustable welding parameters – Speed 0–10mm/s, frequency 0–50Hz.
Cell positioning accuracy ≤±0.1mm.
Battery Filling Port Laser Sealing System – Technical Parameters
As a high‑performance battery filling port laser sealing system, our machine meets the following specifications:
| Parameter | Value |
|---|---|
| Cell positioning accuracy | ≤±0.1 mm |
| Sealing pin positioning accuracy | ≤±0.05 mm |
| Laser output power fluctuation | ≤±3% |
| Laser welding speed | 0 – 10 mm/s (adjustable) |
| Laser welding frequency | 0 – 50 Hz (adjustable) |
| Laser type | Pulsed fiber or Nd:YAG (customer configurable) |
| Cleaning method | Galvanometer laser cleaning |
| Pin material | Aluminum (standard sizes 6–8mm diameter) |
| Cycle time | Typically 2–4 seconds per cell (depending on pin size) |
Process Flow & Automation
The machine is designed for inline integration:
Infeed conveyor – Accepts cells from secondary filling machine.
Cleaning station – Galvanometer laser removes contaminants.
Pin feeding & placement – Vibratory bowl feeder + pick‑and‑place with vision guidance.
Welding station – Laser welding with optional seam tracking.
Outfeed conveyor – Transfers sealed cells to helium leak tester.
All parameters (laser power, speed, frequency, cleaning pattern) are programmable via HMI. Data is logged for traceability.
Why Choose This System for Battery Sealing?
Hermetic seal – Prevents electrolyte leakage and moisture ingress, extending battery life.
High precision – ±0.05mm pin placement, ±0.1mm cell alignment – eliminates off‑center welds.
Stable laser performance – ≤±3% power fluctuation ensures consistent weld quality.
Clean process – Laser cleaning removes electrolyte residue without contact.
Automated – No manual intervention from loading to unloading.
Flexible – Adjustable speed and frequency for different pin sizes and materials.
Applications
Prismatic EV battery manufacturing – Post‑filling sealing.
Energy storage system (ESS) cells – Large format prismatics.
High‑reliability batteries – For medical, aerospace, and telecom applications.
🔩 High precision – ±0.05mm pin positioning, ±0.1mm cell alignment.
⚡ Stable laser welding – ≤±3% power fluctuation, adjustable speed (0–10mm/s) and frequency (0–50Hz).
🤖 Fully automated – Laser cleaning, pin feeding, welding, and transfer – one integrated system.