Packaging method and packaging equipment of flexible perovskite battery

Abstract

The invention discloses a packaging method and packaging equipment of a flexible perovskite cell, and belongs to the technical field of solar cell packaging. The packaging method comprises the following steps of: detecting theoretical winding tension # imgabs0 # of a winding roller on a battery piece by adopting a tension sensor in winding the battery piece; nonlinear tension attenuation winding models # imgabs1 # and # imgabs2 # are adopted as exponential attenuation factors, so that the real-time winding tension # imgabs3 # of the winding roller to the battery piece can be calculated; and finally, the difference value # imgabs6 # and the difference value # imgabs7 # between the # imgabs4 # and the # imgabs5 # are calculated, and the difference value # imgabs6 # and the difference value # imgabs7 # are calculated. Nonlinear tension attenuation winding is carried out by introducing an exponential attenuation factor # imgabs8 #, so that uniform distribution of internal stress of a battery piece can be ensured in the winding process, and the problems of slippage, dislocation, cracking or breakage of the flexible perovskite battery made of a brittle material in the winding process are avoided; and therefore, the stability and reliability of the battery piece in the whole winding process can be guaranteed, and the winding yield of the battery piece is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell packaging, and in particular to a packaging method and packaging equipment for a flexible perovskite cell. Background Art

[0002] When the packaged flexible perovskite cell is rolled up by a winding roller, the winding diameter of the flexible perovskite cell on the winding roller will gradually increase during the entire actual winding process, so that the friction and inertia moment between the two adjacent layers of flexible perovskite cell on the winding roller will show nonlinear changes, and the winding tension of the winding roller on the flexible perovskite cell may be too large or too small, resulting in the internal stress of the flexible perovskite cell being concentrated and unevenly distributed during the winding process, making the flexible perovskite cell with a relatively brittle material prone to slippage, dislocation, cracking or breaking during the winding process, and the stability and reliability of the flexible perovskite cell cannot be guaranteed during the entire winding process, thereby reducing the winding yield rate of the flexible perovskite cell.

[0003] In view of the above problems, a packaging method and packaging equipment for flexible perovskite batteries are urgently needed to solve the above problems. Summary of the invention

[0004] One object of the present invention is to propose a packaging method for a flexible perovskite battery, which can make the internal stress distribution of the battery cell more uniform during the winding process, avoid cracking or breaking of the battery cell and the battery cells in adjacent inner and outer layers from becoming too loose and slipping and misaligned, ensure the stability and reliability of the battery cell in the entire winding process, and improve the winding yield of the battery cell.

[0005] To achieve this object, the present invention adopts the following technical solutions: The packaging method of the flexible perovskite battery comprises the following steps: S1: Make the first unwinding roller, the second unwinding roller, the third unwinding roller, the fourth unwinding roller and the fifth unwinding roller arranged in sequence from top to bottom along the Z axis unwind the upper diaphragm, the upper adhesive film, the flexible perovskite battery module, the lower adhesive film and the lower diaphragm respectively; S2: enabling the packaging device to heat and pressurize the upper diaphragm, the upper glue film, the flexible perovskite battery module, the lower glue film and the lower diaphragm which are horizontally transported and stacked in sequence from top to bottom along the Z axis to form a battery sheet; S3: Using a winding roller to roll up the battery sheet; Wherein, step S3 includes the following steps: S31: Using a tension sensor to detect the theoretical winding tension T0 of the winding roller on the battery sheet; S32: Using nonlinear tension decay winding model: , is the initial winding diameter of the battery sheet on the winding roller and is equal to the diameter of the winding roller; is the real-time winding diameter of the battery sheet on the winding roller; for When the initial winding tension of the winding roller on the battery sheet is equal to the diameter of the winding roller, is an exponential decay factor to calculate the real-time winding tension of the winding roller on the battery sheet ; S33: Calculate T0 and The difference between , -0.5N≤ ≤0.5N.

[0006] As an optional solution, in step S32, in order to balance the tensile deformation of the battery cell and the slippage dislocation between two adjacent layers of the battery cell wound on the winding roller, the battery cell is subjected to tensile test simulation and winding simulation fitting to obtain the exponential decay factor Equal to 0.8.

[0007] As an optional solution, in step S32, the real-time winding diameter of the battery sheet on the winding roller is , is the vertical distance between the non-contact laser sensor and the axis of the winding roller, and the non-contact laser sensor is vertically and fixedly arranged on one side of the axis of the winding roller. It is the vertical distance between the non-contact laser sensor and the outermost surface of the battery sheet rolled up on the winding roller, detected in real time by the non-contact laser sensor.

[0008] As an optional solution, when the winding roller vibrates, the axis of the winding roller is deflected, the outer circumference of the winding roller is uneven, or the outermost surface of the battery cell rolled on the winding roller is uneven, a Kalman filter needs to be introduced to and Perform embedded filtering algorithm noise reduction compensation.

[0009] As an optional solution, the theoretical winding diameter of the battery sheet on the winding roller is , is the number of pulses sent by the encoder according to the winding roller, is the number of pulses issued by the encoder The calculated rotational linear speed of the winding roller; Among them, when the real-time winding diameter Theoretical winding diameter When the deviation between them is >5%, the cascade abnormality alarm is triggered.

[0010] As an optional solution, the theoretical length of each turn of the battery sheet on the winding roller is , the length increment of the battery cell in the time element dt , then the theoretical total length of the battery cell rolled up on the winding roller is , is the rotational angular velocity of the winding roller, The number of pulses emitted by the encoder can be Calculate and obtain, is the winding time of the battery sheet by the winding roller; The real-time total length of the battery sheet rolled up on the winding roller ; Among them, when the real-time total length Theoretical total length When the deviation between them is >3%, the cascade abnormality alarm is triggered.

[0011] As an optional solution, the packaging method of the flexible perovskite battery further includes an error compensation strategy, and the error compensation strategy includes the following steps: Establishing a slip rate correction coefficient k=0.98~1.02 to compensate for the theoretical winding tension T0 detected by the tension sensor to balance the interlayer sliding error between two adjacent layers of the battery cells wound on the winding roller; According to the Young's modulus E of the battery cell and the real-time winding tension of the winding roller on the battery cell , dynamically correct the real-time length of the battery sheet per turn on the winding roller , is a correction constant to balance the elastic deformation error of the battery sheet during the winding process; A compensation coefficient of 0.05 mm / ° C. is established to perform real-time temperature compensation on the non-contact laser sensor to balance the temperature variation error of the non-contact laser sensor during the detection process.

[0012] As an optional solution, the first unwinding roller, the second unwinding roller, the third unwinding roller, the fourth unwinding roller and the fifth unwinding roller are driven by five motors to unwind synchronously, and the unwinding tensions of the first unwinding roller, the second unwinding roller, the third unwinding roller, the fourth unwinding roller and the fifth unwinding roller are coupled to each other; The coupling equations are: , corresponding to the first unwinding roller, the second unwinding roller, the third unwinding roller, the fourth unwinding roller and the fifth unwinding roller in sequence, =1~5, For the Real-time unwinding tension of the unwinding roller, According to the real-time winding tension The corresponding calculation is obtained, For the The angle between the unwinding material unwound from the unwinding roller and the horizontal plane, is the overall unrolled length of the upper diaphragm, the upper adhesive film, the flexible perovskite battery module, the lower adhesive film or the lower diaphragm, The equivalent stiffness coefficient is equal to a constant, The damping coefficient is equal to a constant.

[0013] As an alternative, The five unwinding materials unwound by the first unwinding roller, the second unwinding roller, the third unwinding roller, the fourth unwinding roller and the fifth unwinding roller all enter the packaging device in a horizontal direction, and are calculated by the formula: = a constant value, so as to be able to adjust the output rotational linear speed of each of the five motors to ensure that the movement speed of the five unwinding materials into the packaging device in the horizontal direction is the same; in, For the The rotation speed of the unwinding roller, ; Set constants for unwinding benchmarks; For the The change in the rotational speed of the unwinding roller, Yes Control Relative to The adjustment range, is based on The experimental calibration value obtained by changing the intensity of For the Theoretical unwinding tension of unwinding roller, It can be obtained by detecting the tension sensor; is the direction sign value, when When it is a negative number, ,when When is a positive number, ,when When it is zero, .

[0014] Another object of the present invention is to propose a packaging device for flexible perovskite batteries, which can ensure good unwinding and winding effects, and can ensure that the heating and pressurizing effects of the five unwinding materials are relatively uniform and balanced, thereby better ensuring the packaging effect of the battery cell.

[0015] To achieve this object, the present invention adopts the following technical solutions: A packaging device for a flexible perovskite battery, comprising a first unwinding roller, a second unwinding roller, a third unwinding roller, a fourth unwinding roller, a fifth unwinding roller, a packaging device and a winding roller, wherein the first unwinding roller, the second unwinding roller, the third unwinding roller, the fourth unwinding roller, the fifth unwinding roller and the winding roller are unwound and wound based on the packaging method for the flexible perovskite battery as described above; The packaging device comprises: Packaging box; A heating module is built into the packaging box, and the temperature provided by the heating module increases gradually from 40° C. to 120° C. along the horizontal conveying direction of the battery cell; The pressurizing module is built into the packaging box, and the pressure provided by the pressurizing module increases gradually from 20kpa to 80kpa along the horizontal conveying direction of the battery sheet.

[0016] The beneficial effects of the present invention are: The packaging method of the flexible perovskite battery of the present invention is to make the first unwinding roller, the second unwinding roller, the third unwinding roller, the fourth unwinding roller and the fifth unwinding roller arranged in sequence from top to bottom along the Z axis respectively unwind the upper diaphragm, the upper glue film, the flexible perovskite battery module, the lower glue film and the lower diaphragm; then the packaging device heats and pressurizes the upper diaphragm, the upper glue film, the flexible perovskite battery module, the lower glue film and the lower diaphragm that are horizontally conveyed and stacked in sequence from top to bottom along the Z axis to form a battery cell, that is, the formed battery cell is a flexible perovskite battery; finally, the winding roller is used to wind up the battery cell so as to be able to roll up the packaged battery cell, thereby facilitating the subsequent transportation and processing of the battery cell; wherein, in the process of the winding roller winding up the battery cell, a tension sensor is first used to detect the theoretical winding tension T0 of the winding roller on the battery cell; then a nonlinear tension attenuation winding model is used , in order to calculate the real-time winding tension of the winding roller on the battery sheet ; Finally, calculate T0 and The difference between , and make -0.5N≤ ≤0.5N, it means the real-time winding tension of the winding roller on the battery cell It is more suitable and will not be too large or too small. That is, as the real-time winding diameter of the battery sheet on the winding roller The exponential decay factor is introduced , to balance the nonlinear changes of friction and inertia moment between two adjacent layers of battery cells on the winding roller, and to optimize the real-time winding tension With real-time winding diameter The variable attenuation rate ensures the real-time winding tension of the winding roller on the battery cell It has always been a stable and appropriate value, so that the internal stress distribution of the battery cell is relatively uniform during the entire winding process, so as to match the flexible mechanical properties of the flexible perovskite battery and avoid the problem of cracking or breaking of the flexible perovskite battery with a more brittle material during the winding process, thereby ensuring the stability and reliability of the battery cell during the entire winding process and improving the winding yield rate of the battery cell.

[0017] Moreover, by introducing the exponential decay factor ∂, it is possible to avoid the winding tension of the battery cell on the winding roller from decaying too quickly, so as to ensure that the winding tension gradients of the inner and outer layers of the battery cell wound on the winding roller are relatively gentle and stable, thereby preventing the outer layer of the battery cell from being too loose relative to the inner layer of the battery cell and slipping and misaligning, so that the winding force of the battery cell on the winding roller is more appropriate, ensuring that the winding effect is relatively flat and aligned.

[0018] The packaging equipment of the flexible perovskite battery of the present invention can ensure good unwinding and winding effects because it performs unwinding and winding based on the above-mentioned packaging method of the flexible perovskite battery, so that the quality of the battery cell formed by the packaging can be better; and the temperature provided by the heating module is increased by a gradient from 40°C to 120°C, and the pressure provided by the pressurizing module is increased by a gradient from 20kpa to 80kpa, so as to ensure that the heating effect and pressurizing effect of the five unwinding materials are relatively uniform and balanced, thereby shortening the leveling time of the upper glue film and the lower glue film, and further can better ensure the packaging effect of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a packaging device for a flexible perovskite battery provided by the present invention; Figure 2 The process diagram of the packaging method of the flexible perovskite battery provided by the present invention is as follows Figure 1 ; Figure 3 The process diagram of the packaging method of the flexible perovskite battery provided by the present invention is as follows Figure 2 ; Figure 4 The curve comparison diagram of the real-time winding tension attenuation of the linear model and the nonlinear model provided by the present invention (the horizontal axis is the real-time winding diameter of the battery sheet , the vertical axis is the real-time unwinding tension of the battery cell ).

[0020] Description of reference numerals: 1-first unwinding roller; 11-upper diaphragm; 2-second unwinding roller; 21-upper adhesive film; 3-third unwinding roller; 31-flexible perovskite battery module; 4-fourth unwinding roller; 41-lower adhesive film; 5-fifth unwinding roller; 51-lower diaphragm; 6-packaging device; 7-winding roller; 8-battery cell; 91-upper pressing roller; 92-lower pressing roller. DETAILED DESCRIPTION

[0021] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0022] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0023] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods. Embodiment 1

[0024] In this embodiment, a packaging method for a flexible perovskite battery is proposed, which can ensure that the internal stress distribution of the battery cell is relatively uniform during the entire winding process, so as to match the flexible mechanical properties of the flexible perovskite battery, avoid the problem of cracking or breaking, and slippage and dislocation of the flexible perovskite battery with a relatively brittle material during the winding process, thereby ensuring the stability and reliability of the battery cell during the entire winding process and improving the winding yield rate of the battery cell. Among them, the battery cell is a flexible perovskite battery formed by packaging.

[0025] Specifically, Figures 1 to 4 As shown, the packaging method of the flexible perovskite battery includes the following steps: S1: the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 arranged in sequence from top to bottom along the Z axis respectively unwind the upper diaphragm 11, the upper glue film 21, the flexible perovskite battery module 31, the lower glue film 41 and the lower diaphragm 51; S2: the packaging device 6 heats and pressurizes the upper diaphragm 11, the upper glue film 21, the flexible perovskite battery module 31, the lower glue film 41 and the lower diaphragm 51 that are horizontally transported and stacked in sequence from top to bottom along the Z axis to form a battery cell 8; S3: the winding roller 7 winds up the battery cell 8; so that the packaged battery cell 8 can be rolled up, thereby facilitating the subsequent transportation and processing of the battery cell 8. Among them, the horizontal conveying direction is specifically as follows Figure 1 As shown by arrow B in FIG.

[0026] Furthermore, if Figure 3As shown, the above step S3 includes the following steps: S31: using a tension sensor to detect the theoretical winding tension T0 of the winding roller 7 on the battery cell 8; S32: using a nonlinear tension attenuation winding model: , is the initial winding diameter of the battery cell 8 on the winding roller 7 and is equal to the diameter of the winding roller 7; is the real-time winding diameter of the battery cell 8 on the winding roller 7; for When the initial winding tension of the winding roller 7 on the battery cell 8 is equal to the diameter of the winding roller 7, is an exponential decay factor to calculate the real-time winding tension of the winding roller 7 on the battery cell 8 ; S33: Calculate T0 and The difference between , -0.5N≤ ≤0.5N.

[0027] Compared with the prior art, the packaging method of the flexible perovskite battery in this embodiment introduces an exponential decay factor ∂ in consideration of the nonlinear change of the friction and inertia moment between two adjacent layers of battery cells 8 on the winding roller 7; firstly, a tension sensor is used to detect the theoretical winding tension T0 of the winding roller 7 on the battery cell 8; and then a nonlinear tension attenuation winding model is used. , in order to calculate the real-time winding tension of the winding roller 7 on the battery cell 8 ; Finally, calculate T0 and The difference between , and make -0.5N≤ ≤0.5N, it indicates the real-time winding tension of the winding roller 7 on the battery cell 8 It is more suitable and will not be too large or too small. That is, as the real-time winding diameter of the battery sheet 8 on the winding roller 7 The exponential decay factor is introduced , to balance the nonlinear changes of friction and inertia moment between two adjacent layers of battery sheets 8 on the winding roller 7, and to optimize the real-time winding tension With real-time winding diameter The changing decay rate ensures the real-time winding tension of the winding roller 7 on the battery cell 8 It is always a stable and appropriate value, so that the internal stress distribution of the battery cell 8 can be relatively uniform during the entire winding process, so as to match the flexible mechanical properties of the flexible perovskite battery, avoid the problem of cracking or breaking of the flexible perovskite battery with a brittle material during the winding process, and then ensure the stability and reliability of the battery cell 8 during the entire winding process, and improve the winding yield of the battery cell 8. Among them, the problem of cracking or breaking of the flexible perovskite battery involved in this embodiment during the winding process mainly refers to the cracking or breaking of the active layer in the flexible perovskite battery.

[0028] Furthermore, by introducing the exponential decay factor ∂, it is possible to prevent the winding tension of the battery cell 8 of the winding roller 7 from decaying too quickly, thereby ensuring that the winding tension gradients of the inner and outer layers of the battery cells 8 wound on the winding roller 7 are relatively smooth and stable, thereby preventing the outer layer of the battery cell 8 from being too loose relative to the inner layer of the battery cell 8, so that the winding force of the battery cell 8 on the winding roller 7 is more appropriate, thereby ensuring that the winding effect is relatively flat and aligned.

[0029] Specifically, the winding tension fluctuation can be shown in Table 1 below From the comparison table, it can be seen that compared with the linear winding model in the prior art, the nonlinear tension attenuation winding model used in this embodiment can greatly reduce the winding tension fluctuation. The value range of T0 can be guaranteed The values ​​are close to each other, ensuring the real-time winding tension of the winding roller 7 on the battery cell 8 during the entire winding process. It is always in a relatively stable state, thereby being able to better improve the uniformity of the internal stress of the battery cell 8.

[0030] Table 1

[0031] Specifically, since the battery cell 8 is packaged and rolled up in a roll-to-roll manner in this embodiment, that is, a plurality of smaller square pieces can be connected in series in sequence to form the above-mentioned flexible perovskite battery module 31, thereby being able to package and form a larger battery cell 8; compared to directly using large equipment to process and form a larger battery cell 8, the processing of a large-area battery cell 8 can be made simpler and more convenient, saving the cost of using large equipment, and making the application range of the packaged battery cell 8 wider.

[0032] Furthermore, in the above step S32, in order to better balance the tensile deformation of the battery cell 8 and the slippage dislocation between two adjacent layers of battery cells 8 wound on the winding roller 7, the battery cell 8 is subjected to tensile test simulation and winding simulation fitting, so that the exponential attenuation factor can be obtained through the simulation test. Preferably it is 0.8.

[0033] By making the exponential decay factor It is preferably 0.8, so as to better balance the tensile deformation error of the battery cell 8 itself and the slippage error between two adjacent layers of battery cells 8 during the entire winding process, thereby better ensuring that the internal stress of the battery cell 8 is relatively uniform and the winding roller 7 has a better effect on the leveling and alignment of the battery cell 8.

[0034] Specifically, in the above step S32, the real-time winding diameter of the battery sheet 8 on the winding roller 7 is ;in, is the vertical distance between the non-contact laser sensor and the axis of the winding roller 7. The non-contact laser sensor is vertically and fixedly arranged on one side of the axis of the winding roller 7. Since the non-contact laser sensor is fixedly installed and the axis of the winding roller 7 does not change position, To determine the value; is the vertical distance between the non-contact laser sensor and the outermost surface of the battery sheet 8 rolled up on the winding roller 7, detected in real time by the non-contact laser sensor. is a variable value. Among them, the range of the non-contact laser sensor is 0.1m-5m.

[0035] Furthermore, since there may be unexpected vibrations or processing errors in the actual winding condition, when the winding roller 7 vibrates, the axis of the winding roller 7 deflects, the outer circumference of the winding roller 7 is uneven, or the outermost surface of the battery cell 8 wound on the winding roller 7 is uneven, it is necessary to introduce a Kalman filter to and Perform embedded filtering algorithm noise reduction compensation to obtain and The specific value is more accurate, so that the real-time winding diameter can be better guaranteed. The numerical accuracy of the Kalman filter and the embedded filtering algorithm are common filters and filtering algorithms in the prior art, and the specific noise reduction compensation calculation process will not be described in detail here.

[0036] Furthermore, the theoretical winding diameter of the battery cell 8 on the winding roller 7 is ;in, is the number of pulses sent by the encoder according to the winding roller 7, According to the number of pulses sent by the encoder The calculated rotational linear speed of the winding roller 7; wherein, when the real-time winding diameter Theoretical winding diameter When the deviation between them is >5%, the cascade abnormality alarm is triggered.

[0037] Specifically, when the real-time winding diameter Theoretical winding diameter When the deviation between them is greater than 5%, the stacking abnormality alarm is triggered, that is, at this time, the winding of the battery cell 8 on the winding roller 7 may be too tight or too loose, or there may be a slippage and misalignment problem between two adjacent layers of battery cells 8. Adjustments need to be made before starting the winding to achieve a better winding effect. When the real-time winding diameter Theoretical winding diameter When the deviation between the two is ≤5%, it means that the winding roller 7 has a good winding effect on the battery cell 8 and can continue to wind it. Theoretical winding diameter The real-time monitoring and comparison between them can ensure the winding effect of the winding roller 7 on the battery cell 8.

[0038] Specifically, the theoretical length of each turn of the battery sheet 8 on the winding roller 7 is , the length increment of the battery cell 8 in the time element dt , then correspondingly, the theoretical total length of the battery cell 8 rolled up on the winding roller 7 is ;in, is the rotational angular velocity of the winding roller 7, According to the number of pulses sent by the encoder Calculate and obtain, is the time for the winding roller 7 to wind up the battery cell 8; and the real-time total length of the battery cell 8 wound up on the winding roller 7 ; Among them, when the real-time total length Theoretical total length When the deviation between them is >3%, the cascade abnormality alarm is triggered.

[0039] Specifically, when the real-time total length Theoretical total length When the deviation between them is >3%, the stacking abnormality alarm is triggered, that is, at this time, the winding of the battery cell 8 on the winding roller 7 may be too tight or too loose, or there may be a slippage and misalignment problem between two adjacent layers of battery cells 8. Adjustments need to be made before starting the winding to achieve a better winding effect; when the real-time total length Theoretical total length When the deviation between the real-time total length is ≤3%, it means that the winding roller 7 has a good winding effect on the battery cell 8 and can continue to wind it. Theoretical total length The real-time monitoring and comparison between them can ensure the winding effect of the winding roller 7 on the battery cell 8.

[0040] The above is achieved by measuring the real-time winding diameter Theoretical winding diameter Real-time monitoring comparison between Theoretical total length Real-time monitoring comparison between the two, that is, real-time monitoring is carried out simultaneously from the two aspects of winding diameter and total winding length, which can better ensure the winding effect of the winding roller 7 on the battery cell 8, further ensure the stability and reliability of the battery cell 8 in the whole winding process, and better improve the winding yield rate of the battery cell 8; and, real-time monitoring can also be carried out simultaneously from the two aspects of winding diameter and total winding length, so as to ensure that the stopping timing of winding is more accurate and reliable, that is, when both the winding diameter and the total winding length reach the preset values, it indicates that the winding is completed, so as to stop the winding, thereby better ensuring that the diameter and length of the battery cell 8 obtained by winding meet the required requirements.

[0041] Specifically, when no encoder is provided and the rotational linear velocity of the winding roller 7 is low, the rotational angular velocity of the winding roller 7 can be calculated by the difference of the distance measurement values ​​of two adjacent non-contact laser sensors. ,Right now, ,in, is the time difference between two consecutive non-contact laser sensor ranging times, It needs to be much smaller than the rotation period of the winding roller 7; is the current time value; the above calculation formula can save the cost of the encoder and can be applied to low-speed winding scenarios.

[0042] Table 2

[0043] Furthermore, the packaging method of the flexible perovskite battery also includes an error compensation strategy, such as the error compensation strategy compensation method table shown in Table 2 above, the error compensation strategy includes the following steps: establishing a slip correction coefficient k=0.98~1.02, compensating for the theoretical winding tension T0 detected by the tension sensor to balance the interlayer sliding error between the two adjacent layers of battery cells 8 wound on the winding roller 7; according to the Young's modulus E of the battery cell 8 and the real-time winding tension of the winding roller 7 on the battery cell 8 , dynamically correct the real-time length of each turn of the battery cell 8 on the winding roller 7 , To correct the constant, in order to balance the elastic deformation error of the battery cell 8 during the winding process; a compensation coefficient of 0.05mm / ℃ is established, and real-time temperature compensation is performed on the non-contact laser sensor to balance the temperature change error of the non-contact laser sensor during the detection process.

[0044] The slip rate correction coefficient k is used to compensate the theoretical winding tension T0 detected by the tension sensor, and the real-time length of each turn of the battery cell 8 on the winding roller 7 is dynamically corrected. To balance the elastic deformation error of the battery cell 8 during the winding process, and to perform real-time temperature compensation on the non-contact laser sensor through the compensation coefficient to balance the temperature change error of the non-contact laser sensor during the detection process; thereby better ensuring the winding effect of the winding roller 7 on the battery cell 8, further ensuring the stability and reliability of the battery cell 8 in the entire winding process, and better improving the winding yield rate of the battery cell 8.

[0045] Furthermore, if Figure 1 As shown, the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 are driven by five motors to unwind synchronously, that is, the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 are driven independently by five motors respectively, and the real-time unwinding tension of the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 Mutually coupled, that is, the output rotational linear speeds of the five motors also need to be coupled to each other to ensure the real-time unwinding tension of the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5. It is more suitable and stable; on the one hand, it can ensure that the unwinding materials unwound by the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 will not be too loose or too tight, so as to ensure that the packaging device 6 has a better packaging effect on the five unwinding materials; on the other hand, it can ensure that the internal stress of the five unwinding materials is relatively uniform, and ensure that the five unwinding materials will not crack or break during the unwinding process, thereby ensuring the stability and reliability of the entire unwinding process, and better improving the winding yield of the battery cell 8.

[0046] Among them, Figure 1 As shown, the five unwinding materials mentioned above specifically refer to the upper diaphragm 11, the upper adhesive film 21, the flexible perovskite battery module 31, the lower adhesive film 41 and the lower diaphragm 51; wherein, the upper diaphragm 11 and the lower diaphragm 51 can be specifically water and oxygen barrier films, and the upper adhesive film 21 and the lower adhesive film 41 can be specifically polyolefin elastomer (POE) adhesive film, ethylene-vinyl acetate copolymer (EVA) adhesive film or polyvinyl butyral (PVB) adhesive film.

[0047] Specifically, the real-time unwinding tension between the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 is The coupling equation is: ;in, Corresponding to the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5, =1~5; For the above Real-time unwinding tension of the unwinding roller, According to the above real-time winding tension The corresponding calculation is obtained; For the The angle between the unwinding material unwound from the unwinding roller and the horizontal plane can be obtained by measurement; The length of the upper separator 11, the upper adhesive film 21, the flexible perovskite battery module 31, the lower adhesive film 41 or the lower separator 51 unrolled as a whole; The equivalent stiffness coefficient is equal to a constant, The damping coefficient is equal to a constant; that is, during the entire unwinding process, when =1 (first unwinding roller 1), 2 (second unwinding roller 2), 3 (third unwinding roller 3), 4 (fourth unwinding roller 4), 5 (fifth unwinding roller 5), the calculation formula The real-time unwinding tension of the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 is ensured. The coupling effect between them. Among them, the horizontal plane is as follows Figure 1 As shown by arrow A in the figure, that is, Figure 1 The arrow A in FIG. 1 is in the same horizontal direction as the arrow B mentioned above.

[0048] Furthermore, if Figure 1 As shown, the five unwinding materials unwound by the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 all enter the packaging device 6 in the horizontal direction, so as to ensure the packaging effect of the packaging device 6 on the five unwinding materials, that is, to ensure the packaging quality of the battery cell 8 formed by the packaging.

[0049] Specifically, through the calculation formula: = a constant value, so that the output rotational linear speed of each of the five motors can be adjusted to ensure that the five unwinding materials move at the same speed into the packaging device 6 in the horizontal direction, that is, the five unwinding materials unwound by the first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4 and the fifth unwinding roller 5 all enter the packaging device 6 at the same speed in the horizontal direction; wherein, For the The rotation speed of the unwinding roller, ; Set constants for unwinding benchmarks; For the The change in the rotational speed of the unwinding roller, Yes Control Relative to The adjustment range, is based on The experimental calibration value obtained by changing the intensity of For the Theoretical unwinding tension of unwinding roller, It can be obtained by tension sensor detection; is the direction sign value, when When it is a negative number, ,when When is a positive number, ,when When it is zero, .

[0050] Specific test conditions: = 100mm, =8N, the maximum real-time winding diameter of the battery cell 8 after winding = 600mm, the rotation speed of the winding roller 7 =2m / min, can be calculated through the above formulas: for example , as well as ,like Figure 4 As shown, the winding tension fluctuation is calculated It is within the range of ±0.5N, and can measure the interlayer strain distribution of adjacent battery cells 8 by a laser interferometer to obtain a 40% improvement in the uniformity of the internal stress of the battery cell 8, thereby significantly improving the uniformity of the internal stress of the battery cell 8; and, relative to the bubble occurrence rate of 3.5% of the battery cell 8 in the prior art, the bubble occurrence rate of the battery cell 8 in this embodiment can be reduced to 0.7%; at the same time, relative to the 92% yield rate of the battery cell 8 in the prior art, the yield rate of the battery cell 8 in this embodiment can be increased to 98.5%. Embodiment 2

[0051] This embodiment proposes a packaging device for a flexible perovskite battery, such as Figure 1 As shown, the packaging equipment of the flexible perovskite battery includes the above-mentioned first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4, the fifth unwinding roller 5, the packaging device 6 and the winding roller 7. The first unwinding roller 1, the second unwinding roller 2, the third unwinding roller 3, the fourth unwinding roller 4, the fifth unwinding roller 5 and the winding roller 7 are unwound and wound based on the packaging method of the flexible perovskite battery in the above-mentioned embodiment 1 to ensure the unwinding effect and the winding effect.

[0052] Furthermore, if Figure 1As shown, the packaging device 6 includes a packaging box, a heating module and a pressurizing module; wherein the packaging box can provide a relatively stable vacuum packaging environment for the five unwinding materials conveyed thereto; the heating module is built into the packaging box, along the horizontal conveying direction of the battery cell 8, that is, the above Figure 1 In the horizontal conveying direction indicated by the arrow B in FIG. 1 , the temperature provided by the heating module increases gradually from 40°C to 120°C; the pressurizing module is built into the packaging box, and the pressure provided by the pressurizing module increases gradually from 20kPa to 80kPa along the horizontal conveying direction of the battery cell 8. The packaging box adopts a packaging box structure commonly used in the prior art.

[0053] By increasing the temperature provided by the heating module from 40°C to 120°C, and increasing the pressure provided by the pressurizing module from 20kPa to 80kPa, that is, the heating temperature and the packaging pressure are applied in a step-by-step manner, so that the five unrolled materials can be heated and pressurized in a gradient manner, and the heating and pressurizing effects on the five unrolled materials are ensured to be relatively uniform and balanced, so that the leveling time of the upper glue film 21 and the lower glue film 41 can be shortened, so that the packaging effect of the formed battery cell 8 is better. Among them, the heating module can specifically adopt an electric heating structure, and the pressurizing module can specifically adopt an electric pressurizing structure.

[0054] Furthermore, the packaging device 6 also includes a CCD camera and a pneumatic fine-tuning mechanism connected in communication; wherein the CCD camera and the pneumatic fine-tuning mechanism are both built into the packaging box; the CCD camera is used to detect the interlayer alignment of the five unwinding materials in the packaging box, and feed back the detection information to the pneumatic fine-tuning mechanism, so that the pneumatic fine-tuning mechanism can adjust the interlayer alignment of the five unwinding materials, thereby ensuring the interlayer alignment accuracy between the five unwinding materials, that is, ensuring the interlayer alignment accuracy between the upper diaphragm 11, the upper glue film 21, the flexible perovskite battery module 31, the lower glue film 41 and the lower diaphragm 51 stacked from top to bottom along the Z axis, thereby improving the packaging effect and ensuring the quality of the battery cell 8 formed by the packaging. The resolution of the CCD camera is 5um, and the pneumatic fine-tuning mechanism can adopt the pneumatic fine-tuning structure commonly used in the prior art.

[0055] Specifically, the packaging device 6 also includes an online detection module, which is built into the packaging box; wherein the online detection module includes an infrared thermal imager and an electronic luminescence detector, so that the uniformity of the hot pressing temperature field in the packaging box can be detected in real time through the infrared thermal imager, so that the gradient heating provided by the heating module is more appropriate and reliable; at the same time, the electronic luminescence detector detects the hidden crack defects of the battery cell 8 after packaging, ensuring that the winding roller 7 only winds up the battery cell 8 that has passed the inspection, avoiding waste of resources and improving work efficiency.

[0056] Furthermore, the packaging equipment of the flexible perovskite battery also includes a control module, which adopts a hybrid architecture of a field programmable gate array (FPGA) and a programmable logic controller (PLC); the FPGA is responsible for high-speed data acquisition, and the FPGA can respond quickly at the μs level to ensure the speed and accuracy of data acquisition; the PLC executes the control algorithm and HMI interaction during the entire process of unwinding, packaging and winding. Among them, HMI (Human Machine Interaction) interaction specifically refers to the interaction process between man and machine to realize the exchange and interaction of information.

[0057] Furthermore, if Figure 1 As shown, the packaging equipment of the flexible perovskite battery also includes an upper pressing roller 91 and a lower pressing roller 92. Along the Z axis, the upper pressing roller 91 and the lower pressing roller 92 are arranged opposite to each other and at intervals. The upper diaphragm 11, the upper glue film 21, the flexible perovskite battery module 31, the lower glue film 41 and the lower diaphragm 51 are stacked from top to bottom along the Z axis. Five unwinding materials are transported horizontally to between the upper pressing roller 91 and the lower pressing roller 92, so that the five unwinding materials can be transported horizontally to the packaging device 6 for flattening and packaging through the flattening effect between the upper pressing roller 91 and the lower pressing roller 92; and, through the above-mentioned = a constant value, ensuring that the five unwinding materials all enter between the upper pressing roller 91 and the lower pressing roller 92 at a constant speed in the horizontal direction, thereby ensuring the packaging effect of the packaging device 6 on the five unwinding materials.

[0058] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A packaging method for a flexible perovskite battery, characterized in that: The following steps are involved: S1: causing a first unwinding roller (1), a second unwinding roller (2), a third unwinding roller (3), a fourth unwinding roller (4) and a fifth unwinding roller (5) which are arranged in sequence from top to bottom along the Z axis to respectively unwind an upper diaphragm (11), an upper adhesive film (21), a flexible perovskite battery module (31), a lower adhesive film (41) and a lower diaphragm (51); S2: causing the packaging device (6) to heat and pressurize the upper diaphragm (11), the upper glue film (21), the flexible perovskite battery module (31), the lower glue film (41), and the lower diaphragm (51) which are horizontally transported and stacked in sequence from top to bottom along the Z axis to form a battery cell (8); S3: causing the winding roller (7) to wind up the battery sheet (8); Wherein, step S3 includes the following steps: S31: using a tension sensor to detect the theoretical winding tension T0 of the winding roller (7) on the battery sheet (8); S32: Using nonlinear tension decay winding model: , is the initial winding diameter of the battery sheet (8) on the winding roller (7) and is equal to the diameter of the winding roller (7); is the real-time winding diameter of the battery sheet (8) on the winding roller (7); for When the initial winding tension of the winding roller (7) on the battery sheet (8) is equal to the diameter of the winding roller (7), is an exponential decay factor, so as to calculate the real-time winding tension of the winding roller (7) on the battery sheet (8) ; S33: Calculate T0 and The difference between , -0.5N≤ ≤0.5N.

2. The packaging method of the flexible perovskite battery according to claim 1, characterized in that: In step S32, in order to balance the tensile deformation of the battery cell (8) and the slippage between two adjacent layers of the battery cell (8) wound on the winding roller (7), the battery cell (8) is subjected to tensile test simulation and winding simulation fitting to obtain the exponential decay factor Equal to 0.

8.

3. The packaging method of the flexible perovskite battery according to claim 1, characterized in that: In step S32, the real-time winding diameter of the battery sheet (8) on the winding roller (7) is , is the vertical distance between the non-contact laser sensor and the axis of the winding roller (7), the non-contact laser sensor being arranged vertically and fixedly at intervals on one side of the axis of the winding roller (7), It is the vertical distance between the non-contact laser sensor and the outermost surface of the battery sheet (8) rolled up on the winding roller (7), detected in real time by the non-contact laser sensor.

4. The packaging method of the flexible perovskite battery according to claim 3, characterized in that: When the winding roller (7) vibrates, the axis of the winding roller (7) is deflected, the outer peripheral surface of the winding roller (7) is uneven, or the outermost surface of the battery cell (8) rolled up on the winding roller (7) is uneven, a Kalman filter needs to be introduced to and Perform embedded filtering algorithm noise reduction compensation.

5. The packaging method of the flexible perovskite battery according to claim 3, characterized in that: Theoretical winding diameter of the battery sheet (8) on the winding roller (7) , is the number of pulses emitted by the encoder according to the winding roller (7), is the number of pulses emitted by the encoder The calculated rotational linear speed of the winding roller (7); Among them, when the real-time winding diameter Theoretical winding diameter When the deviation between them is >5%, the cascade abnormality alarm is triggered.

6. The packaging method of the flexible perovskite battery according to claim 5, characterized in that: The theoretical length of each turn of the battery sheet (8) on the winding roller (7) , the length increment of the battery cell (8) within the time element dt , then the theoretical total length of the battery sheet (8) rolled up on the winding roller (7) is , is the rotational angular velocity of the winding roller (7), The number of pulses emitted by the encoder can be Calculate and obtain, is the time for the winding roller (7) to wind up the battery sheet (8); The real-time total length of the battery sheet (8) rolled up on the winding roller (7) ; Among them, when the real-time total length Theoretical total length When the deviation between them is >3%, the cascade abnormality alarm is triggered.

7. The packaging method of the flexible perovskite battery according to claim 6, characterized in that: The packaging method of the flexible perovskite battery also includes an error compensation strategy, which includes the following steps: Establishing a slip rate correction coefficient k=0.98-1.02 to compensate for the theoretical winding tension T0 detected by the tension sensor, so as to balance the interlayer slip error between two adjacent layers of the battery cells (8) wound on the winding roller (7); According to the Young's modulus E of the battery sheet (8) and the real-time winding tension of the winding roller (7) on the battery sheet (8) , dynamically correcting the real-time length of each turn of the battery sheet (8) on the winding roller (7) , A correction constant is used to balance the elastic deformation error of the battery sheet (8) during the winding process; A compensation coefficient of 0.05 mm / ° C. is established to perform real-time temperature compensation on the non-contact laser sensor to balance the temperature variation error of the non-contact laser sensor during the detection process.

8. The packaging method of a flexible perovskite battery according to any one of claims 1 to 7, characterized in that: The first unwinding roller (1), the second unwinding roller (2), the third unwinding roller (3), the fourth unwinding roller (4) and the fifth unwinding roller (5) are driven by five motors to unwind synchronously, and the unwinding tensions of the first unwinding roller (1), the second unwinding roller (2), the third unwinding roller (3), the fourth unwinding roller (4) and the fifth unwinding roller (5) are coupled to each other; The coupling equations are: , corresponding to the first unwinding roller (1), the second unwinding roller (2), the third unwinding roller (3), the fourth unwinding roller (4) and the fifth unwinding roller (5) in sequence, =1~5, For the Real-time unwinding tension of the unwinding roller, According to the real-time winding tension The corresponding calculation is obtained, For the The angle between the unwinding material unwound from the unwinding roller and the horizontal plane, is the overall unrolled length of the upper diaphragm (11), the upper adhesive film (21), the flexible perovskite battery module (31), the lower adhesive film (41) or the lower diaphragm (51), The equivalent stiffness coefficient is equal to a constant, The damping coefficient is equal to a constant.

9. The packaging method of the flexible perovskite battery according to claim 8, characterized in that: The five types of unwinding materials unwound by the first unwinding roller (1), the second unwinding roller (2), the third unwinding roller (3), the fourth unwinding roller (4) and the fifth unwinding roller (5) all enter the packaging device (6) in a horizontal direction, according to the calculation formula: = a constant value, so as to be able to adjust the output rotational linear speed of each of the five motors to ensure that the movement speed of the five unwinding materials into the packaging device (6) in the horizontal direction is the same; in, For the The rotation speed of the unwinding roller, ; Set constants for unwinding benchmarks; For the The change in the rotational speed of the unwinding roller, Yes Control Relative to The adjustment range, is based on The experimental calibration value obtained by changing the intensity of For the Theoretical unwinding tension of unwinding roller, It can be obtained by detecting the tension sensor; is the direction sign value, when When it is a negative number, ,when When is a positive number, ,when When it is zero, .

10. A packaging device for a flexible perovskite battery, characterized in that: The invention comprises a first unwinding roller (1), a second unwinding roller (2), a third unwinding roller (3), a fourth unwinding roller (4), a fifth unwinding roller (5), a packaging device (6) and a winding roller (7), wherein the first unwinding roller (1), the second unwinding roller (2), the third unwinding roller (3), the fourth unwinding roller (4), the fifth unwinding roller (5) and the winding roller (7) are unwound and wound based on the packaging method of the flexible perovskite battery according to any one of claims 1 to 9; The packaging device (6) comprises: Packaging box; A heating module is built into the packaging box, and the temperature provided by the heating module increases gradually from 40°C to 120°C along the horizontal conveying direction of the battery cell (8); A pressurizing module is built into the packaging box, and along the horizontal conveying direction of the battery sheet (8), the pressure provided by the pressurizing module increases gradually from 20 kPa to 80 kPa.

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