Photovoltaic panel hot knife peeling device control system and control method thereof

Abstract

The application discloses a photovoltaic panel hot-knife stripping device control system and a control method thereof. The system comprises a main controller module, a servo module, a sensor acquisition module and a temperature control module. The main controller module is used for receiving control instructions of an upper computer module and feeding back state information of the system to the upper computer. The servo module is used for receiving instructions from the main controller module, realizing servo motor motion control, feeding back speed, position and current state information of the motor to the main controller module for analysis and processing. The sensor acquisition module is used for periodically collecting various signals and sending the signals to the main controller module. The temperature control module is used for constant temperature control of the hot knife according to a temperature setting value sent by the main controller module. The upper computer module is used for setting process parameters, sending control instructions to the main controller module, receiving state information fed back by the main controller module and displaying the state information. The application can control automatic physical separation of a back plate tempered glass and a cell silicon wafer film in a photovoltaic panel, and has high stripping efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic panel hot knife stripping device, and particularly relates to a photovoltaic panel hot knife stripping device control system and a control method thereof. BACKGROUND

[0002] In recent years, China's photovoltaic industry has rapidly risen, and the total installed capacity of photovoltaic power generation has ranked first in the world. However, photovoltaic panels will enter the retirement stage after 20-30 years of service life, and the amount of discarded photovoltaic panels will also increase rapidly. The world is about to usher in a "retirement wave" of photovoltaic panels, and the photovoltaic panel component recycling market is huge, so it is of great significance to carry out research on photovoltaic panel recycling technology.

[0003] At present, the traditional method for separating the backplane tempered glass and the cell film of the photovoltaic panel is to crush or pulverize the photovoltaic panel, and then to extract other components by dissolving the glass through a chemical method. This method not only pollutes the environment, but also cannot directly reuse the tempered glass. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art, and provides a photovoltaic panel hot knife stripping device control system and a control method thereof. The system can automatically separate the backplane tempered glass and the cell film of the photovoltaic panel, and the surface EVA glue residual rate of the tempered glass after separation is low, and there is no damage and the stripping efficiency is high.

[0005] To achieve the above-mentioned purpose, the present application designs a photovoltaic panel hot knife stripping device control system, which comprises a main controller module, the main controller module is connected with an upper computer module, and is used for receiving control instructions of the upper computer module and feeding back state information of the system to the upper computer;

[0006] A servo module is connected with the main controller module, and is used for receiving instructions from the main controller module, realizing motion control of the servo motor, feeding back speed, position and current state information of the motor to the main controller module for analysis and processing by the main controller module;

[0007] A sensor acquisition module is connected with the main controller module, and is used for completing periodic acquisition of various signals and sending the signals to the main controller module;

[0008] A temperature control module is connected with the main controller module, and is used for constant temperature control of the hot knife according to the temperature setting value sent by the main controller module;

[0009] An upper computer module is connected with the main controller module, and is used for setting process parameters, sending control instructions to the main controller module, receiving state information fed back by the main controller module and displaying the state information.

[0010] Further, the main controller module communicates with the host computer module through Ethernet, and reads the angle value of the absolute value angle encoder through the RS485 communication bus.

[0011] Further, the communication between the main controller module and the servo module adopts the CAN bus complying with the CANOPEN protocol.

[0012] Further, the servo module comprises a plurality of drivers, and the drivers are used to drive a plurality of servo motors, and the plurality of servo motors are respectively used to drive the roller mechanism, the hot knife lifting mechanism, the feeding mechanism and the material receiving mechanism of the hot knife peeling device of the photovoltaic panel.

[0013] Further, the servo module comprises 9 drivers respectively driving 9 servo motors; wherein 6 servo motors are used to drive the roller mechanisms arranged in upper and lower rows of the hot knife peeling device of the photovoltaic panel to move and adopt a parallel synchronous control algorithm, 1 servo motor is used to drive the hot knife lifting mechanism to move, 1 servo motor is used to drive the feeding mechanism to move, and 1 servo motor is used to drive the material receiving mechanism to move.

[0014] Further, the sensor acquisition module comprises a first position sensor, a second position sensor, a third position sensor and a fourth position sensor, the first position sensor is used to detect the starting peeling signal of the photovoltaic panel, the second position sensor and the third position sensor are used to detect the signal that the photovoltaic panel reaches above the hot knife, and the fourth position sensor is used to detect the hot peeling completion signal of the photovoltaic panel.

[0015] Further, the main controller module judges the trajectory deviation of the photovoltaic panel according to the time interval when the second position sensor and the third position sensor respectively detect the photovoltaic panel, and if the time interval when the second position sensor and the third position sensor respectively detect the photovoltaic panel exceeds 2s, the peeling device is paused, and the photovoltaic panel position is adjusted and then the action is continued.

[0016] Still further, the temperature control module heats the electric heating rod built in the hot knife according to the hot knife temperature set by the main controller module, compares the temperature signal fed back by the temperature sensor embedded in the hot knife with the set temperature to adjust the heating power of the electric heating rod, and realizes the fuzzy PID closed loop control of the hot knife temperature.

[0017] Still further, the temperature control module also starts the quartz heating tube to assist in heating the photovoltaic panel according to the heat loss in the hot peeling process.

[0018] The application also provides a method for controlling the photovoltaic panel hot knife peeling device control system, comprising the following steps:

[0019] Step 1: first power on the system and perform system self-checking, while feeding back the self-checking result to the upper computer module, and the system can work after the self-checking is normal;

[0020] Step 2: after the self-checking is normal, set the hot knife temperature, photovoltaic panel moving speed, lifting height process parameter of the hot knife lifting mechanism on the upper computer module, start heating the hot knife, and utilize the temperature control module to control the temperature of the hot knife;

[0021] Step 3: after the hot knife reaches the set temperature, start the system, and the feeding mechanism starts to work, and the photovoltaic panel is conveyed to the hot stripping mechanism;

[0022] Step 4: when the first position sensor signal is detected, the stripping mechanism roller works, and the photovoltaic panel is conveyed to the hot knife, and the quartz heating tube is started to assist heating the photovoltaic panel;

[0023] Step 5: when the second position sensor signal and the third position sensor signal are detected at the same time, the stripping mechanism stops the photovoltaic panel conveying action, and the hot knife is lifted to the set height, after preheating for 5-10s, the stripping mechanism continues to work, and the hot knife stripping work starts;

[0024] Step 6: when the fourth position sensor signal is detected, the current photovoltaic panel stripping is completed, and the separated back plate tempered glass and cell silicon film are obtained, at this time, the hot knife is lowered and reset, and the quartz heating tube stops heating;

[0025] Step 7: the next working cycle is carried out according to steps 4-6.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] Firstly, the photovoltaic panel hot knife stripping device control system can realize the automatic physical separation of the back plate tempered glass and the cell silicon film in the photovoltaic panel, has high stripping efficiency, obtains complete back plate tempered glass and cell silicon film, has low EVA glue residual rate on the surface of the tempered glass after separation treatment, and has no damage, and can be used as city road sound insulation glass after simple treatment, and also facilitates the recovery of the crystal silicon and valuable metal components of the cell film itself.

[0028] Secondly, the temperature control module of the photovoltaic panel hot knife stripping device control system adopts fuzzy PID control to control the temperature of the hot knife, and the quartz heating tube is used to assist heating the photovoltaic panel, and is used to compensate the heat loss when the hot knife contacts the photovoltaic panel.

[0029] Third, the control system of the photovoltaic panel hot knife peeling device of the present invention uses the second position sensor and the third position sensor to detect the time interval of the photovoltaic panel, and realizes the judgment of the deviation of the photovoltaic panel's movement trajectory. When the deviation of the photovoltaic panel's movement trajectory is large, the peeling device can be paused, and the operation can only continue after the position of the photovoltaic panel is manually adjusted.

[0030] Fourth, the photovoltaic panel hot knife peeling device control system of the present invention can realize automatic and manual control of the photovoltaic panel hot knife peeling device, and at the same time has the function of linkage control with supporting process equipment such as photovoltaic panel module frame removal and sorting equipment through Ethernet communication interface.

[0031] Fifth, the control system of the photovoltaic panel hot knife peeling device of the present invention can control the photovoltaic panel to preheat for a sufficient time after the hot knife is removed, so that the hot knife blade can fully melt the battery film adhesive layer and enter the bonding surface of the tempered glass and the battery film. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a photovoltaic panel hot knife peeling device.

[0033] Figure 2 This is a schematic diagram of the control system of the photovoltaic panel hot knife peeling device of the present invention;

[0034] Figure 3 This is a schematic diagram of the motion control system of the photovoltaic panel hot knife peeling device of the present invention;

[0035] Figure 4 This is a schematic diagram of the temperature control system of the photovoltaic panel hot knife peeling device of the present invention;

[0036] In the diagram: 1. Feeding mechanism; 2. Stripping mechanism; 3. Receiving mechanism; 4. Roller mechanism; 5. Hot knife. Detailed Implementation

[0037] The following examples illustrate the implementation of the present invention in detail, but they do not constitute a limitation on the invention and are merely illustrative. Furthermore, the advantages of the present invention will become clearer and easier to understand by explaining them.

[0038] like Figure 1 The photovoltaic panel hot knife peeling device shown includes a feeding mechanism 1, a peeling mechanism 2, and a receiving mechanism 3 arranged sequentially along the direction of photovoltaic panel movement. The peeling mechanism 2 has two rows of roller mechanisms 4 arranged on it. The photovoltaic panel hot knife peeling device is equipped with a cam mechanism and an absolute angle encoder, which can precisely control the lifting height of the hot knife. This height is adjusted according to the different thicknesses of the photovoltaic panel's solar cell film, ensuring that the blade of the hot knife 5 reaches the bonding surface between the tempered glass and the solar cell silicon wafer film.

[0039] like Figure 2The application discloses a photovoltaic panel hot-knife stripping device control system, which comprises a main controller module, an upper computer module, a servo module, a sensor acquisition module and a temperature control module.

[0040] The main controller module communicates with the upper computer module through an Ethernet and reads angle values of an absolute value angle encoder through an RS485 communication bus.

[0041] As shown in Figure 3 The servo module comprises a plurality of drivers, the drivers are used for driving a plurality of servo motors, and the plurality of servo motors are respectively used for driving roller mechanisms, hot-knife lifting mechanisms, feeding mechanisms and material receiving mechanisms of the photovoltaic panel hot-knife stripping device to move.

[0042] AsFigure 3 As shown, the sensor acquisition module includes a first position sensor, a second position sensor, a third position sensor and a fourth position sensor, and the four position sensors are arranged on the translation motion path of the photovoltaic panel. The first position sensor is used to detect the photovoltaic panel start peeling signal, the second position sensor and the third position sensor are used to detect the photovoltaic panel reaching above the hot knife signal, and the fourth position sensor is used to detect the photovoltaic panel hot peeling completion signal. The second position sensor and the third position sensor are arranged on both sides of the hot knife length direction to detect whether the photovoltaic panel reaches above the hot knife, and the two sensors must be detected at the same time to perform the lifting action, so as to prevent the photovoltaic panel from contacting the hot knife on one side when the hot knife is lifted, resulting in peeling failure. The main controller module judges the photovoltaic panel motion trajectory deviation according to the time interval of the photovoltaic panel detected by the second position sensor and the third position sensor, and if the time interval of the photovoltaic panel detected by the second position sensor and the third position sensor is more than 2s, it indicates that the photovoltaic panel motion trajectory deviation is large, and the peeling device is paused, and the photovoltaic panel position is manually adjusted before the action can continue.

[0043] As shown in the figure, Figure 4 As shown, the temperature control module compares the temperature signal fed back by the temperature sensor embedded in the hot knife with the set temperature to adjust the heating power of the electric heating rod, so as to realize the fuzzy PID closed-loop control of the hot knife temperature. The temperature control module considers that the EVA glue gasification process in the photovoltaic panel hot knife peeling process takes away a lot of heat, and adopts a quartz heating tube to assist heating the photovoltaic panel itself to compensate for the heat loss in the hot peeling process, so that the hot knife temperature stability is better. The fuzzy PID control is used to control the temperature of the hot knife, and the quartz heating tube is used to preheat the photovoltaic panel to compensate for the heat loss taken away by the hot knife and the photovoltaic panel in the peeling process. After the hot knife is lowered, the hot knife blade is fully melted into the battery film glue layer, and then enters the glass and battery film glue surface.

[0044] The method for controlling the photovoltaic panel hot knife peeling device control system by using the above-mentioned photovoltaic panel hot knife peeling device control system, comprising the following steps:

[0045] Step 1: First, power on the system and perform system self-checking, and feedback the self-checking result to the upper computer module, and the system can work after the self-checking is normal;

[0046] Step 2: After the self-checking is normal, set the hot knife temperature, photovoltaic panel moving speed, lifting height process parameters of the hot knife lifting mechanism on the upper computer module, start heating the hot knife, and use the temperature control module to control the temperature of the hot knife;

[0047] Step 3: After the hot knife reaches the set temperature, the system is started, and the feeding mechanism starts to work, and the photovoltaic panel is conveyed to the hot stripping mechanism;

[0048] Step 4: When the first position sensor signal is detected, the stripping mechanism roller works, and the photovoltaic panel is conveyed to the hot knife, and the quartz heating tube is started to assist in heating the photovoltaic panel;

[0049] Step 5: When the second position sensor signal and the third position sensor signal are detected at the same time, the stripping mechanism stops the photovoltaic panel conveying action, and the hot knife is lifted to a set height, and after preheating for 5-10s, the stripping mechanism continues to work, and the hot knife stripping work starts;

[0050] Step 6: When the fourth position sensor signal is detected, the current photovoltaic panel stripping is completed, and the separated back plate tempered glass and cell silicon wafer film are obtained, and at this time, the hot knife is lowered and reset, and the quartz heating tube stops heating;

[0051] Step 7: The next working cycle is carried out according to steps 4-6.

[0052] The above is only a specific embodiment of the present application, and it should be pointed out that any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application, and the remaining prior art is not described in detail.

Claims

1. A control system for a photovoltaic panel hot knife peeling device, characterized in that: include The main controller module is connected to the host computer module and is used to receive control commands from the host computer module and simultaneously feed back system status information to the host computer. The servo module is connected to the main controller module and is used to receive instructions from the main controller module to realize the motion control of the servo motor. At the same time, it feeds back the speed, position and current status information of the motor to the main controller module for analysis and processing. A sensor acquisition module, which is connected to the main controller module, is used to periodically acquire various signals and send them to the main controller module. A temperature control module, which is connected to the main controller module, is used to maintain a constant temperature for the hot knife according to the temperature setpoint sent by the main controller module. The host computer module is connected to the main controller module and is used to set process parameters, send control commands to the main controller module, and receive and display status information fed back by the main controller module. The servo module includes several drivers, which drive several servo motors. The servo motors are used to drive the roller mechanism, hot knife lifting mechanism, feeding mechanism, and receiving mechanism of the photovoltaic panel hot knife peeling device to move. The sensor acquisition module includes a first position sensor, a second position sensor, a third position sensor, and a fourth position sensor. The first position sensor is used to detect the signal that the photovoltaic panel begins to peel off. The second and third position sensors are used to detect the signal that the photovoltaic panel reaches above the hot knife. The fourth position sensor is used to detect the signal that the photovoltaic panel has completed hot peeling. The main controller module determines the deviation of the photovoltaic panel's movement trajectory based on the time interval between the detection of the photovoltaic panel by the second position sensor and the third position sensor. If the time interval between the detection of the photovoltaic panel by the second position sensor and the third position sensor exceeds 2 seconds, the stripping device is paused, the position of the photovoltaic panel is adjusted, and the operation continues. The temperature control module heats the heating rod built into the hot knife according to the hot knife temperature set by the main controller module. At the same time, it compares the temperature signal fed back by the temperature sensor embedded in the hot knife with the set temperature to adjust the heating power of the heating rod, thereby realizing fuzzy PID closed-loop control of the hot knife temperature.

2. The control system for the photovoltaic panel hot knife stripping device according to claim 1, characterized in that: The main controller module communicates with the host computer module via Ethernet and reads the angle value of the absolute angle encoder via RS485 communication bus.

3. The control system for the photovoltaic panel hot knife stripping device according to claim 1, characterized in that: The main controller module and the servo module communicate using a CAN bus that follows the CANOPEN protocol.

4. The control system for the photovoltaic panel hot knife stripping device according to claim 1, characterized in that: The servo module includes 9 drivers, each driving a 9-servo motor; among them, 6 servo motors are used to drive the upper and lower rows of roller mechanisms of the photovoltaic panel hot knife peeling device and adopt a parallel synchronous control algorithm, 1 servo motor is used to drive the hot knife lifting mechanism, 1 servo motor is used to drive the feeding mechanism, and 1 servo motor is used to drive the receiving mechanism.

5. The control system for the photovoltaic panel hot knife stripping device according to claim 4, characterized in that: The temperature control module also activates the quartz heating tube to provide auxiliary heating to the photovoltaic panel based on the heat loss during the hot stripping process.

6. A method for controlling the photovoltaic panel hot knife stripping device using the control system of any one of claims 1 to 5, characterized in that: Includes the following steps: Step 1: First, power on the system and perform a system self-test. At the same time, report the self-test results to the host computer module. The system can only be put into operation after the self-test is normal. Step 2: After the self-test is normal, set the hot knife temperature, photovoltaic panel moving speed, and hot knife lifting height process parameters on the host computer module, start heating the hot knife, and use the temperature control module to control the hot knife at a constant temperature. Step 3: After the hot knife reaches the set temperature, the system is started and the feeding mechanism begins to move, conveying the photovoltaic panel to the hot stripping mechanism; Step 4: When the first position sensor signal is detected, the stripping mechanism roller moves to start conveying the photovoltaic panel above the hot knife, and at the same time, the quartz heating tube is activated to assist in heating the photovoltaic panel; Step 5: When the signals from the second and third position sensors are detected simultaneously, the peeling mechanism pauses the photovoltaic panel conveying action and raises the hot knife to the set height. After preheating for 5 to 10 seconds, the peeling mechanism continues to operate and begins the hot knife peeling operation. Step 6: When the signal from the fourth position sensor is detected, the current photovoltaic panel is peeled off, and the separated back tempered glass and battery silicon film are obtained. At this time, the hot knife descends and resets, and the quartz heating tube stops heating. Step 7: Proceed to the next work cycle following steps 4-6.

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