Photovoltaic Industry- Sensor Applications for Battery

As a clean renewable energy, photovoltaic plays an important part in the future energy structure. From the perspective of the industrial chain, photovoltaic equipment production can be summarized as upstream silicon wafer manufacturing, midstream battery wafer manufacturing and downstream module manufacturing. Different processing equipment is involved in each production link. With the continuous improvement of production technology, the precision requirements for production processes and related production equipment are also constantly improving. In each process production stage, the application of automation equipment in the photovoltaic production process plays a key role in connecting the past and the future, improving efficiency and reducing costs.

Production Process of Photovoltaic Industry

Batteries play a pivotal role in the entire production process of the photovoltaic industry. Each square battery shell is composed of a shell and a cover plate which is the core component to ensure the safety of the lithium battery. It will be sealed with the shell of the battery cell, the internal energy output, and ensure the key components of the safety of battery cell, which has strict requirements for component sealing, relief valve pressure, electrical performance, size and appearance.

As the sensing system of automation equipment, sensor has the characteristics of accurate sensing, flexible installation and fast response. How to choose a suitable sensor according to specific working condition, in order to achieve the purpose of cost reduction, efficiency increase and stable operation. There are various working conditions in the production process, different ambient light, different production rhythms and different color silicon wafers, such as silicon after cutting diamond, gray silicon and blue wafer after velvet coating, etc. both have strict requirements. Lanbao sensor can provide a mature solution for the automatic assembly and inspection production of battery cover plate.

Design outline

Solar Cell - Technological Process

Passivated Emitter Rear Contact, namely passivation emitter and back passivation battery technology. Usually, on the basis of conventional batteries, aluminum oxide and silicon nitride film is plated on the back, and then the film is opened by laser. At present, the conversion efficiency of PERC process cells has been close to the theoretical limit of 24%.

Lanbao sensors are rich in species and widely used in various process segments of PERC battery production. Lanbao sensors can not only achieve stable and accurate positioning and spot detection, but also meet the needs of high-speed production , boosting the efficiency and cost reduction of photovoltaic manufacturing.

Important equipment used in production

Sensor applications of cell machine

Working position	Application	Product
Curing oven, ILD	Place detection of metal vehicle	Inductive Sensor-High temperature resistant series
Battery production equipment	Place detection of silicon wafer, wafer carrier, railboat and graphite boat	Photoelectric Sensoe-PSE-Polarized reflection series
(Screen printing, track line, etc.)
Universal station - Motion module	Origin location	Photoelectric Sensor-PU05M/PU05S sloat slot series

Sensor applications of cell machine

Working position	Application	Product
Cleaning equipment	Pipeline level detection	Capactive Sensor-CR18 series
Track line	Presence detection and spot detection of silicon wafer; Presence detection of wafer carrier	Capacitive sensor-CE05 series,CE34 series, Photoelectric sensor-PSV series (convergent relection), PSV series (backgroud suppression)
Track transmission	Detection of wafer carrier and quartz boat location	Cpacitive Sensor-CR18 series, photoelectric sensor-PST series (background suppression/ through beam reflection), PSE series (through beam reflection)
Suction cup, buff below, mechanism lift	Presence detection of silicon chips	Photoelectric sensor-PSV series (convergent reflection), PSV series (backgroud suppression), Cpacitive Sensor-CR18 series
Battery production equipment	Presence detection of wafer carrier and silicon chips/ Position detection of quartz	Photoelectric sensor-PSE Series (background suppression)

Smart Sensing,Lanbao Selection

Product model	Product picture	Product feature	Application scenario	Application display
Ultra-thin photoelectric sensor- PSV-SR/YR series		1. Background suppression and convergent reflection are commonly ued in photovoltaic industry ; 2 Fast response for detecting small objects moving at high speed 3 Distinct two-color indicator light, red light source designation is easy to operate and align; 4 Ultra-thin size for installation in narrow and small spaces.	In the battery/ silicon wafer production process, it needs to go through a large number of transfers to make it enter the next process, in the transfer process, it is necessary to check whether the silicon wafer/battery under the conveyor belt/ track/ sucker is in place or not.
Micro photoelectric sensor-PST-YC series		1. M3 through hole installation with small size, easy to install and use; 2. With 360° visible bright LED status indicator; 3. Good resistance to light interference to achieve high product stability; 4. Small spot for stably detection of small objects; 5. Good background suppression and color sensitivity, can stably detect black objects.	In the silicon wafer/ battery wafer production process, it is necessary to detect the wafer carrier on the rail transmission line, and the PST background suppression series sensor can be installed at the bottom to realize the stable detection of the wafer carrier. At the same time installed on the side of the quartz boat.
Capacitive sensor- CE05 flat series		1. 5mm flat shape 2. Screw holes and cable tie holes installation design 3. Optional 5mm non-adjustable and 6mm adjustable detection distance 4. Widely used in silicon, battery, PCB, and other fields	This series of sensors are mostly used for the presence or absence of silicon wafers/batteries in the production of silicon wafers and battery wafers, and are mostly installed under the track line etc.
Photoelectric sensor-PSE-P polarized reflection		1 Universal shell, easy to replace 2 Visible light spot, easy to install and debug 3 Sensitivity one-button setting, accurate and fast setting 4 Can detect bright objects and partially transparent objects 5 NO/NC can be set by wires, easy to set	The series is mainly installed under the track line, the silicon wafer and wafer carrier on the track line can be detected, and it can also be installed on both sides of the quartz boat and graphite boat track to detect the position.
Photoelectric sensor-PSE-T through beam series		1 Universal shell, easy to replace 2 Visible light spot, easy to install and debug 3 Sensitivity one-button setting, accurate and fast setting 4 NO/NC can be set by wires, easy to set	The series is mainly installed on both sides of the track line to detect the position of the wafer carrier on the track line, and can also be installed at both ends of the material box storage line to detect the silicon/battery in the material box.

Post time: Jul-19-2023