CN101975726A

CN101975726A - Thermostatic detection device for silver paste viscosity

Info

Publication number: CN101975726A
Application number: CN201010283760XA
Authority: CN
Inventors: 腾路
Original assignee: Changzhou EGing Photovoltaic Technology Co Ltd
Current assignee: Changzhou EGing Photovoltaic Technology Co Ltd
Priority date: 2010-09-13
Filing date: 2010-09-13
Publication date: 2011-02-16

Abstract

The invention discloses a thermostatic detection device for silver paste viscosity, which comprises a thermostatic water tank, a refrigerating machine, a circulating pump, a water duct, a water inlet valve, a groove-type checkout console, a return water valve, a return water pipe, a silver paste cup and a viscosity measuring meter, wherein the refrigerating machine is arranged at the lower end of the thermostatic water tank; the circulating pump is arranged in the thermostatic water tank; the circulating pump is communicated with the groove-type checkout console through the water duct; the groove-type checkout console is connected with the thermostatic water tank through the return water pipe; the silver paste cup is placed on the groove-type checkout console; and the groove-type checkout console is positioned below the viscosity measuring meter. Because the silver paste cup is placed on the groove-type checkout console, the silver paste to be detected is directly isothermally treated by the thermostatic water in the groove-type checkout console and then the subjected to viscosity measurement so that the thermostatic treatment time of the silver paste to be detected can be greatly shortened, the detection efficiency is improved and the accuracy of silver paste viscosity measurement can be ensured.

Description

Silver slurry viscosity Constant Temperature Detection device

Technical field

The present invention relates to the pick-up unit of a kind of battery sheet with silver-colored slurry viscosity.

Background technology

A kind of thick mixture slurry that the silver slurry is made up of particulate, bonding agent, solvent, the auxiliary agent of highly purified (99.9%) argent.It is very strict that conductive silver paste requires its component.The particulate of argent is the Main Ingredients and Appearance of conductive silver paste, and the conductive characteristic of solar cell mainly is to embody by it.The content of argent in slurry is directly relevant with electric conductivity, and the content height of silver is useful to the electric conductivity that improves it, but when its content surpassed critical volume concentration, its electric conductivity can not improve.General silver content is when 80～90% (weight ratios), and electric conduction quantity has reached mxm., and when content continuation increase, electric conduction quantity no longer improves, and resistance value is in rising trend; When content is lower than 60%, the changes in resistance instability.In concrete the application, silver-colored fraction of particle should be considered stable resistance in the silver slurry, restricted by factors such as curing characteristics, bonding strength, economy, too high as silver-colored fraction of particle, it is low to be bonded the probability that resin wraps, the bonding force of silver conductor descends behind the film-forming, the danger that has silver granuel to come off.Therefore, the content of the silver in the silver slurry suits generally 60～70%.

The viscosity of silver paste of solar cells has directly influenced the light-receiving area and the cell photoelectric conversion efficiency of solar cell surface, and it is a very crucial technology of making in the solar cell.If silver-colored slurry viscosity is on the low side, though the good fluidity of slurry, printing back grid line caves in greatly at silicon chip surface, has increased the shading area of solar cell surface, reduce the light-receiving area of solar cell surface, reduced the photoelectric transformation efficiency of solar cell in the unit area; On the contrary, if viscosity is higher, though silver slurry printing back grid line is not easy to cave in, highly viscous slurry is difficult for printing, caking, and electric conductivity instability easily.Therefore, in the preparation process of silver slurry, must test, at present, test silver-colored slurry viscosity and use rotational viscosimeter usually the viscosity of slurry.Experimental results show that: temperature deviation is very big to the viscosity influence of battery silver paste, and temperature raises, and viscosity descends.When 0.5 ℃ of temperature deviation, its viscosity number deviation surpasses 5%, therefore, when measuring battery silver paste viscosity, must in constant temperature enclosure, carry out, also silver slurry to be checked must be placed on before detection and deposit in the constant temperature enclosure the enough time, the temperature that silver is starched reaches the indoor temperature of constant temperature enclosure, so just can guarantee the accuracy of viscosity measurement.This method of testing test condition requires harsh, and efficient is low, and the frequency of sampling observation is subjected to the restriction of detection method, and this detection method directly has influence on the production of silver slurry.

Summary of the invention

In order to overcome silver-colored slurry viscosity testing process above shortcomings, the purpose of this invention is to provide a kind of silver-colored slurry viscosity Constant Temperature Detection device.

The technical scheme that the present invention takes is as follows:

Described silver-colored slurry viscosity Constant Temperature Detection device, comprise constant temperature water tank, refrigeration machine, ebullator, water-supply-pipe, inlet valve, slot type check-out console, backwater valve, return pipe, silver slurry cup and viscosimeter, refrigeration machine is arranged on the lower end of constant temperature water tank, ebullator is arranged in the constant temperature water tank, one end of water-supply-pipe links to each other with the water delivering orifice of ebullator, the other end and slot type check-out console interlink, and are provided with inlet valve on water-supply-pipe; One end of return pipe interlinks by backwater valve and slot type check-out console, and the other end of return pipe leads to constant temperature water tank, and silver slurry cup is placed on the slot type check-out console, and the slot type check-out console is positioned at the below of viscosimeter.

Because the silver slurry cup of silver slurry will be housed to be placed on the slot type check-out console, and the slot type check-out console is constantly injected from constant temperature water tank extraction thermostatted water by ebullator, silver slurry in the silver slurry cup can directly be carried out the equality of temperature processing by the thermostatted water in the slot type check-out console before detection, cross in the silver slurry that again viscosimeter is extend into after eight to ten minutes in the silver slurry cup, can shorten the constant temperature processing time of silver slurry to be checked so significantly, can guarantee the accuracy that silver-colored slurry viscosity is measured again, improved detection efficiency, it has overcome the deficiency that prior art exists better.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Among the figure: the 1-constant temperature water tank; The 2-refrigeration machine; The 3-ebullator; The 4-water-supply-pipe; The 5-inlet valve; 6-slot type check-out console; The 7-backwater valve; The 8-return pipe; 9-silver slurry cup; The 10-viscosimeter.

Embodiment

Below in conjunction with description of drawings the specific embodiment of the present invention:

Described silver-colored slurry viscosity Constant Temperature Detection device, as shown in Figure 1, it comprises constant temperature water tank 1, refrigeration machine 2, ebullator 3, water-supply-pipe 4, inlet valve 5, slot type check-out console 6, backwater valve 7, return pipe 8, silver slurry cup 9 and viscosimeter 10, refrigeration machine 2 is arranged on the lower end of constant temperature water tank 1, ebullator 3 is arranged in the constant temperature water tank 1, one end of water-supply-pipe 4 links to each other with the water delivering orifice of ebullator 3, and the other end of water-supply-pipe 4 interlinks by inlet valve 5 and slot type check-out console 6; One end of return pipe 8 interlinks by backwater valve 7 and slot type check-out console 6, and the other end leads to constant temperature water tank 1, and silver slurry cup 9 is placed on the slot type check-out console 6, and slot type check-out console 6 is positioned at the below of viscosimeter 10.

Concrete using method of the present invention is as follows: when water temperature reaches predetermined temperature in the constant temperature water tank 1, inlet valve 5 is opened, close backwater valve 7, start ebullator 3, the thermostatted water of constant temperature water tank 1 just constantly is extracted and injects slot type check-out console 6, when water level reaches the precalculated position in the slot type check-out console 6, open backwater valve 7, silver slurry to be checked is injected silver slurry cup 9 to be checked, again silver slurry cup 9 to be checked is placed on the slot type check-out console 6, through constant temperature processing in eight to ten minutes, the silver slurry in the silver slurry cup 9 just with constant temperature water tank in the water equality of temperature, again viscosimeter 10 is extend at last during silver in the silver slurry cup 9 starches, can guarantee the accuracy that silver-colored slurry viscosity is measured like this, can shorten the constant temperature processing time of silver slurry to be checked again, improve detection efficiency, overcome the deficiency that prior art exists better.

Claims

1. silver-colored slurry viscosity Constant Temperature Detection device, it is characterized in that: it comprises constant temperature water tank (1), refrigeration machine (2), ebullator (3), water-supply-pipe (4), inlet valve (5), slot type check-out console (6), backwater valve (7), return pipe (8), silver slurry cup (9) and viscosimeter (10), refrigeration machine (2) is arranged on the lower end of constant temperature water tank (1), ebullator (3) is arranged in the constant temperature water tank (1), one end of water-supply-pipe (4) links to each other with the water delivering orifice of ebullator (3), and the other end of water-supply-pipe (4) interlinks by inlet valve (5) and slot type check-out console (6); Return pipe (8) interlinks by backwater valve (7) and slot type check-out console (6), and the other end leads to constant temperature water tank (1), and silver slurry cup (9) is placed on the slot type check-out console (6), and slot type check-out console (6) is positioned at the below of viscosimeter (10).