Photovoltaic cell screen printing procedure induction table top and parameter adjusting method

Abstract

The invention discloses a photovoltaic cell silk-screen printing procedure induction table top which comprises an induction weighing table top arranged on a machine table of a silk-screen printing machine, a driving device drives the induction weighing table top to rotate, and the induction weighing table top is sequentially provided with a sheet feeding test station, a pattern printing station, a sheet discharging test station and an idling test station. The sheet feeding test station and the sheet discharging test station correspond to a feeding port and a discharging port of the screen printing machine respectively, and electronic scales are connected to the bottoms of the sheet feeding test station, the sheet discharging test station and the idling test station; the electronic scale is in signal connection with the central controller, and signal interaction is achieved between the central controller and a main controller of the screen printing machine. By means of the induction weighing table top, the purposes of automatic measurement, automatic parameter adjustment and SPC stabilization in the silk-screen printing process are achieved; and compared with manual operation, the precision and the coverage rate are very stable and comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of battery screen printing, and in particular to a photovoltaic battery screen printing process sensing table and a parameter adjustment method. Background Art

[0002] As the most basic SPC in the screen printing process, the wet weight of the cell printing plays a vital role in the printing quality, grid line shaping and efficiency; therefore, timely monitoring and adjustment of the stability of the wet weight is the fundamental to ensure the conversion efficiency of the cell and product quality.

[0003] At present, the measurement of the wet weight of printed battery cells is mainly done by personnel manually taking the cells and putting them into a balance scale to test the first weight, then putting them back into the printer for printing, and then taking them out for testing and weighing them. The difference between the two values ​​is used to determine whether they meet the SPC control requirements. If not, personnel are required to adjust and optimize the machine parameters to meet the control requirements. The traditional wet weight measurement method has the following disadvantages: ① High manual operation costs and test errors: personnel are required to perform manual tests every hour, and there are weighing errors due to the influence of the temperature, placement and technique of taking the cells; ② Low detection frequency: Manual operation can only spot check 1 cell per hour, while a single machine needs to print 100,000 to 110,000 cells per day, with a low coverage rate; ③ Human intervention and adjustment is required: If the wet weight SPC is detected to not meet the control requirements, personnel are required to intervene to adjust the machine parameters.

[0004] Therefore, there is an urgent need for a photovoltaic cell screen printing process sensing table and parameter adjustment method. Summary of the invention

[0005] The purpose of the present invention is to provide a photovoltaic cell screen printing process sensing table and parameter adjustment method to achieve automatic measurement, automatic parameter adjustment, and stable SPC; and the accuracy and coverage are very stable and comprehensive compared to manual operation, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A photovoltaic cell screen printing process induction table, comprising an induction weighing table arranged on a machine table of a screen printing machine, a driving device driving the induction weighing table to rotate, and a film feeding test station, a graphic printing station, a film discharging test station and an idling test station are arranged on the induction weighing table in sequence; the film feeding test station and the film discharging test station correspond to the loading port and the unloading port of the screen printing machine respectively, and the bottoms of the film feeding test station, the film discharging test station and the idling test station are all connected to an electronic scale; the electronic scale signal is connected to a central controller, and signal interaction is achieved between the central controller and the main controller of the screen printing machine.

[0007] A method for adjusting parameters of a photovoltaic cell screen printing process, using the photovoltaic cell screen printing process sensing table, comprises the following steps: Step 1: The battery cell enters the screen printing machine, first passes through the feeding port, and enters the induction weighing table; at this time, the induction weighing table performs a battery cell feeding weight test at the feeding test station, and the test result is recorded as value A.

[0008] Step 2: The induction weighing table rotates clockwise, and the battery cell enters under the screen and starts printing the pattern; under the action of the screen and the scraper, the slurry prints the silver paste onto the surface of the battery cell.

[0009] Step 3: After printing is completed, the induction weighing table continues to rotate. At this time, the battery cell is located at the discharge port. The induction weighing table performs a battery cell weight test at the discharge test station, and the test result is recorded as value B.

[0010] Step 4: The central controller counts and calculates the value A and the value B, and the difference is the wet weight of the silver paste of each battery cell.

[0011] Step 5. The central controller compares the measured data with the set SPC value range, and transmits a signal to the main controller for the wet weight that exceeds the set range. The main controller adjusts the parameters according to the signal. The main controller adjusts the parameters including but not limited to the screen distance, the pressure of the scraper pressing down the screen, and the amount of silver paste. At the discharge port, the battery cells whose wet weight does not exceed the set range are judged as good products and discharged, and the battery cells whose wet weight exceeds the set range are judged as defective products and rejected.

[0012] Step 6. After unloading is completed, the inductive weighing table continues to rotate to the idling test station, where the inductive weighing table performs a weight test on the battery cell carrier. The test result is recorded as a value C. The central controller determines whether the carrier is in an unloaded state based on the value C.

[0013] Step 7: After the main controller parameter adjustment is completed, the next battery cell is tested for the wet weight of the silver paste, and the test is sent back to the main controller to confirm whether a second adjustment is required; until the wet weight of the silver paste reaches the target range.

[0014] Step 8: The main controller records the statistical wet weight and parameter adjustment and forms visual graphic data.

[0015] Beneficial effects of the present invention: First, the present invention realizes automatic measurement, automatic parameter adjustment and SPC stabilization through the induction weighing table.

[0016] Second, the measurement accuracy and wet weight coverage of silver paste of the battery cell of the present invention are more accurate and comprehensive than those of manual operation.

[0017] Third, the test data and adjustment records of the present invention are formed into charts to visualize data, thereby facilitating production management.

[0018] Fourthly, the present invention reduces the number of workers and lowers the labor costs of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a block diagram of the overall system of the present invention.

[0020] Figure 2 It is a schematic diagram of the induction weighing table of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1 , 2 As shown, a photovoltaic cell screen printing process induction table comprises an induction weighing table arranged on a machine table of a screen printing machine, a driving device drives the induction weighing table to rotate, and a film feeding test station, a graphic printing station, a film discharging test station and an idling test station are arranged on the induction weighing table in sequence; the film feeding test station and the film discharging test station correspond to the loading port and the unloading port of the screen printing machine respectively, and the bottoms of the film feeding test station, the film discharging test station and the idling test station are all connected with a high-precision electronic scale; the electronic scale signal is connected to the central controller, and signal interaction is realized between the central controller and the main controller of the screen printing machine.

[0023] A method for adjusting parameters of a photovoltaic cell screen printing process, using the photovoltaic cell screen printing process sensing table, comprises the following steps: Step 1: The battery cell enters the screen printing machine, first passes through the feeding port, and enters the induction weighing table; at this time, the induction weighing table performs a battery cell feeding weight test at the feeding test station, and the test result is recorded as value A.

[0024] Step 2: The induction weighing table rotates clockwise, and the battery cell enters under the screen and starts printing the pattern; under the action of the screen and the scraper, the slurry prints the silver paste onto the surface of the battery cell.

[0025] Step 3: After printing is completed, the induction weighing table continues to rotate. At this time, the battery cell is located at the discharge port. The induction weighing table performs a battery cell weight test at the discharge test station, and the test result is recorded as value B.

[0026] Step 4: The central controller counts and calculates the value A and the value B, and the difference is the wet weight of the silver paste of each battery cell.

[0027] Step 5. The central controller compares the measured data with the set SPC value range, and transmits a signal to the main controller for the wet weight that exceeds the set range. The main controller adjusts the parameters according to the signal. The main controller adjusts the parameters including but not limited to the screen distance, the pressure of the scraper pressing down the screen, and the amount of silver paste. At the discharge port, the battery cells whose wet weight does not exceed the set range are judged as good products and discharged, and the battery cells whose wet weight exceeds the set range are judged as defective products and rejected.

[0028] Step 6. After unloading is completed, the inductive weighing table continues to rotate to the idling test station, where the inductive weighing table performs a weight test on the battery cell carrier. The test result is recorded as a value C. The central controller determines whether the carrier is in an unloaded state based on the value C.

[0029] Step 7: After the main controller parameter adjustment is completed, the next battery cell is tested for the wet weight of the silver paste, and the test is sent back to the main controller to confirm whether a second adjustment is required; until the wet weight of the silver paste reaches the target range.

[0030] Step 8: The main controller records the statistical wet weight and parameter adjustment and forms visual graphic data.

[0031] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic cell screen printing process sensing table, characterized in that: The invention comprises an inductive weighing table arranged on the machine platform of a screen printing machine, a driving device drives the inductive weighing table to rotate, and a film feeding test station, a graphic printing station, a film discharging test station and an idling test station are arranged on the inductive weighing table in sequence; the film feeding test station and the film discharging test station correspond to the loading port and the unloading port of the screen printing machine respectively, and the bottom of the film feeding test station, the film discharging test station and the idling test station are all connected with an electronic scale; the electronic scale signal is connected to a central controller, and signal interaction is realized between the central controller and the main controller of the screen printing machine.

2. A method for adjusting parameters of a photovoltaic cell screen printing process, using the photovoltaic cell screen printing process sensing table as claimed in claim 1, characterized in that The steps include: Step 1: The cell enters the screen printer, passes through the loading port, and enters the induction weighing table. At this time, the induction weighing table performs a cell feeding weight test at the feeding test station, and the test result is recorded as value A. Step 2: The induction weighing table rotates clockwise, and the battery sheet enters under the screen and starts printing the pattern; The paste is printed onto the surface of the cell under the action of the screen and the scraper; Step 3: After printing is completed, the induction weighing table continues to rotate. At this time, the battery cell is located at the discharge port. The induction weighing table performs a weight test on the battery cell at the discharge test station. The test result is recorded as value B. Step 4: The central controller counts and calculates the value A and the value B, and the difference is the wet weight of the silver paste of each battery cell; Step 5: The central controller compares the measured data with the set SPC value range, and transmits a signal to the main controller for the wet weight that exceeds the set range, and the main controller adjusts the parameters according to the signal; at the unloading port, the battery cells whose wet weight does not exceed the set range are judged as good products and unloaded, and the battery cells whose wet weight exceeds the set range are judged as defective products and rejected; Step 6: After unloading is completed, the inductive weighing table continues to rotate to the idling test station, where the inductive weighing table performs a weight test on the cell carrier. The test result is recorded as a value C, and the central controller determines whether the carrier is in an unloaded state based on the value C; Step 7: After the main controller parameter adjustment is completed, the next battery cell is tested for the wet weight of the silver paste, and the test is sent back to the main controller to confirm whether a second adjustment is required; until the wet weight of the silver paste reaches the target range.

3. A method for adjusting parameters of a photovoltaic cell screen printing process according to claim 2, characterized in that: The method also includes step 8, wherein the main controller records the statistical wet weight and parameter adjustment and forms visual graphic data.

4. A method for adjusting parameters of a photovoltaic cell screen printing process as claimed in claim 2, characterized in that: The main controller adjusts the parameters including screen distance, screen pressure of the scraper, and silver paste dosage.

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