Linear-proportional-control-based cell welding circuit and heating method thereof
A technology of battery sheet welding and linear ratio, which is applied in the direction of electric heating devices, welding equipment, and electric temperature control, etc., can solve problems that affect the service life of components, hidden cracks in electromagnetic sheets, and virtual welding, etc., to improve quality and improve reliability effect
Active Publication Date: 2012-10-03
HANGZHOU COMFIRMWARE TECH CO LTD
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Problems solved by technology
The heating curves of the two welding methods are all stepwise temperature changes, such as figure 1 As shown, it can be found that when this method is used for welding, the temperature rises suddenly (step), which is easy to cause hidden cracks in the electromagnetic sheet. It is a process of rapid cooling (stepwise), so that internal stress is easily generated between the ribbon and the electromagnetic sheet, resulting in damage to the electromagnetic sheet
Between the bus bar and the silver grid line, there are also phenomena such as over-welding, virtual welding, and rough surface welding. Due to virtual welding and over-welding, the power generation efficiency of the battery sheet is directly affected.
Due to the above problems, the electromagnetic sheet welded by the final component is also unstable, which directly affects the service life of the component
Method used
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Embodiment 1
[0034] 1. Hardware configuration: Control terminal: Mitsubishi Q04UDHCPU+Q608DAIN
[0035] Operation interface: Weiluntong MT8150X
[0036] Output terminal: Schneider MCPC2425D
[0037] Welding lamp: ATN LB-BS360N-2
[0038] 2. Software environment: 1.GX-Works2
[0039] 2. EasyBuilder8000
[0040] 3. Hardware wiring diagram: see figure 2
[0041] In the GX-Works2 environment, first set the 1ms heating and cooling value: set the resolution of the heating time and cooling time to 1mS, then the 1mS heating value = (heating set value - preheating and cooling set value) / heating time. 1mS cooling value = (heating set value - preheat cooling set value) / cooling time.
[0042] The value setting is converted into the power setting: assuming that the value is X, according to Figure 7 The linear relationship in, can get the output current value I=X*16 / 12000+4(mA), in the Figure 9 The current-voltage ratio of the silicon controlled re...
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The invention discloses a linear-proportional-control-based cell welding circuit. The linear-proportional-control-based cell welding circuit comprises a transformer, an analog quantity output control module, a silicon controlled and an infrared lamp tube, wherein the transformer is connected with the analog quantity output control module and the silicon controlled; the analog quantity output control module is connected with the silicon controlled; an output end of the silicon controlled is connected with one end of the infrared lamp tube; the other end of the infrared lamp tube is connected with mains supply; and the silicon controlled controls the voltage output into the infrared lamp tube according to different current signals input by the analog quantity output control module. By adoption of the control mode, smooth temperature control can be realized, the phenomena of breakage, concealed crack and the like of the cell in the welding process are effectively controlled, and the cell breakage rate is reduced from the original 8 percent to 3 percent numerically; and moreover, the welding reliability and stability are improved, and the component quality is improved to a certain degree.
Description
technical field [0001] The invention relates to a battery sheet welding circuit based on linear proportional control and a method for heating the battery sheet by using the device. Background technique [0002] In recent years, the demand for clean energy has increased at home and abroad, and the demand for photovoltaic modules has also grown rapidly. In the entire production process, the welding of cells and bus bars is a very critical link. At present, in the electromagnetic sheet welding process, direct welding with electric soldering iron and infrared welding technology are generally used. The heating curves of the two welding methods are all stepwise temperature changes, such as figure 1 As shown, it can be found that when this method is used for welding, the temperature rises suddenly (step), which is easy to cause hidden cracks in the electromagnetic sheet. It is a process of rapid cooling (stepwise), so that internal stress is easily generated between the ribbon an...
Claims
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IPC IPC(8): B23K3/04B23K3/08G05D23/19
Inventor 张承业
Owner HANGZHOU COMFIRMWARE TECH CO LTD