Detection of Busbar Welding Defocus with SinceVision Laser Displacement Sensor
In lithium battery manufacturing, achieving precision in busbar-to-tab welding is critical for performance and safety. Misalignment or focus errors can result in cold solder joints or burn-through defects, directly affecting product reliability.
SinceVision’s SD33 series laser displacement sensor delivers high-accuracy defocus detection (≤0.03mm), measuring surface height deviations in real time. It provides immediate feedback to welding equipment, enabling automatic focal adjustments and significantly lowering the risk of weld defects.
This ensures high-quality, sub-millimeter level inspection for every weld, improving yield and consistency in high-volume battery production.
SinceVision Solution: SD33-85 Laser Displacement Sensor
Camera Selection
| Model number | SD33-85-485-VA | ||
| Reference distance (CD) | 85mm | ||
| Measuring range | ±15mm | ||
| Light source | Light source wavelength | 655nm | |
| Laser class | Class 2 | ||
| Laser output power | 1mW | ||
| Spot diameter (spot size) | Near side | 150×600μm | |
| Reference distance | 140×990μm | ||
| Remote side | 190×1200μm | ||
Repetition accuracy | 10μm | ||
| linearity | ±0.1% F.S. | ||
| Temperature characteristic | 0.05% F.S./℃ | ||
| Sampling frequency (Hz) | 500/1000/2000/3000Hz(4 levels optional) | ||
| Input/output | Communication port | 1 RS485 (support ModbusRTU) | |
| Analog output | 1 analog output, analog voltage (0~10V) or analog current (4~20mA) Analog voltage or analog current cannot be switched | ||
| IO input | 1 channel, support laser shutdown, remote teaching, sampling hold, single pulse trigger, return to zero and other functions | ||
| IO output | 1 route, determine the status output | ||
Operating temperature | -10 ~ 50℃ | ||
| Storage temperature | -20 ~ 70℃ | ||
| Working humidity | 35% to 85% no condensation | ||
| EFT protection | Power port 2kV/5 or 100kHz, signal port 1kV/5 or 100kHz, in accordance with IEC 61000-4-4 standards | ||
| ESD protection | Contact discharge is 4kV and air discharge is 8kV, in line with IEC 61000-4-2 standards | ||
| Vibration | 10~55Hz, double amplitude 1.5mm, X, Y, Z direction 2 hours each | ||
| Impact | Punch 500m/s² (about 50G) three times in X, Y, and Z directions | ||
| IP level | IP67, conforming to IEC 60529 standard | ||
| dimensions (mm) | 60×50×22 | ||
| Weight (including cables) | 120g | ||