Battery piece film covering device and method

Abstract

The invention relates to the technical field of production of solar cells, particularly provides a cell film coating device and method, and aims to solve the problem of poor film coating effect of a solar cell module. Therefore, the battery piece film covering device comprises a conveying assembly and a heating assembly. The conveying assembly is provided with a first pressing belt and a second pressing belt, the first pressing belt can abut against the bottom face of the battery piece assembly, the second pressing belt can abut against the top face of the battery piece assembly, and the conveying assembly can convey the battery piece assembly to a preset position; the heating assembly comprises a first heating component and a second heating component, the first heating component is arranged on the side, away from the battery piece assembly, of the first pressing belt, and the second heating component is arranged on the side, away from the battery piece assembly, of the second pressing belt. According to the scheme, the bottom surface and the top surface of the battery piece assembly can be heated and pressurized at the same time, so that the adhesive film is better attached to the battery piece to form tight packaging, and the film covering effect of the battery piece assembly is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell production, and specifically provides a cell sheet coating device and method. Background Art

[0002] Busbarless photovoltaic cells refer to photovoltaic cells that do not have busbars on the surface of the cell to collect current, but instead rely mainly on welding ribbons to collect current. Compared with traditional photovoltaic cells, busbarless photovoltaic cells reduce the consumption of silver paste, thereby reducing the manufacturing cost of photovoltaic cells.

[0003] On a busbarless photovoltaic cell, a soldering tape on the cell surface needs to be fixed by a thin film coating. In the existing coating process for busbarless photovoltaic cells, the soldering tape is usually laid on the cell surface first, and then the surface of the film is covered with the entire surface of the cell and the soldering tape. The film is heated to achieve pre-fixation of the film and the soldering tape on the point-out surface, and then the film is rolled by a rolling mechanism to press the film and the soldering tape onto the cell to achieve coating.

[0004] However, as the rolling mechanism rolls on the film, the heated and softened film will adhere to the roller, causing the film to be unable to firmly cover the battery cell, especially at the welding point of the battery welding ribbon. The film is prone to warping, resulting in poor coating effect on the edge of the battery cell, seriously affecting the performance and reliability of the photovoltaic module.

[0005] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0006] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing solar cell module coating effect is poor.

[0007] In a first aspect, the present invention provides a battery cell coating device, comprising:

[0008] A conveying assembly, the conveying assembly having a first pressing belt and a second pressing belt, the first pressing belt can abut against the bottom surface of the battery cell assembly, the second pressing belt can abut against the top surface of the battery cell assembly, and the conveying assembly can transfer the battery cell assembly to a predetermined position;

[0009] A heating assembly includes a first heating component and a second heating component, wherein the first heating component is disposed on a side of the first pressing belt away from the battery cell assembly, and the second heating component is disposed on a side of the second pressing belt away from the battery cell assembly.

[0010] In the preferred technical solution of the above-mentioned battery cell film laminating device, along the transmission direction of the battery cell assembly, the first heating member is sequentially provided with a preheating zone, a heating zone, and a cooling zone, and / or

[0011] Along the transmission direction of the battery cell assembly, the second heating member is sequentially provided with a preheating zone, a heating zone, and a cooling zone;

[0012] Wherein, the temperatures of the heating zone, the preheating zone, and the cooling zone decrease in sequence.

[0013] In the preferred technical solution of the above-mentioned battery cell film laminating device, the first heating member is in contact with the first pressing belt, and / or,

[0014] The second heating member is in contact with the second pressing belt.

[0015] In the preferred technical solution of the above-mentioned battery cell film laminating device, the battery cell film laminating device further includes a lifting mechanism, and the lifting mechanism can adjust the distance between the first pressing belt and the second pressing belt.

[0016] In the preferred technical solution of the above-mentioned battery cell film laminating device, the battery cell film laminating device further includes a plurality of pressure sensors. The pressure sensors can detect the pressure of the battery cell assembly, and the pressure sensors are signal-connected to the lifting mechanism. The lifting mechanism can adjust the distance between the first pressing belt and the second pressing belt according to the signals fed back by the pressure sensors.

[0017] In the preferred technical solution of the above-mentioned battery cell film laminating device, the conveying assembly includes a first conveyor belt, a second conveyor belt, and a driving mechanism. The first conveyor belt and the second conveyor belt are arranged at intervals. The first conveyor belt is the first pressing belt, and the second conveyor belt is the second pressing belt. The driving mechanism can drive the first conveyor belt and the second conveyor belt to perform a closed-loop movement, and the first conveyor belt and the second conveyor belt move synchronously in diameter,

[0018] The lifting mechanism is connected to the driving mechanism, and the lifting mechanism can drive the driving mechanism to move to adjust the distance between the first conveyor belt and the second conveyor belt

[0019] In the preferred technical solution of the above-mentioned battery cell film laminating device, the driving mechanism includes a driving motor, a first roller group, and a second roller group. The driving motor can drive the first roller group and the second roller group to rotate. The first conveyor belt is sleeved on the first roller group, and the first conveyor belt can perform a closed-loop movement around the first roller group. The second conveyor belt is sleeved on the second roller group, and the second conveyor belt can perform a closed-loop movement around the second roller group.

[0020] The lifting mechanism can be connected to the first roller group and the second roller group respectively to adjust the distance between the first conveyor belt and the second conveyor belt.

[0021] In the preferred technical solution of the above-mentioned battery cell coating device, the first roller group includes a first driving roller and a first driven roller, the first driving roller and the first driven roller are arranged at intervals, the first conveyor belt is sleeved on the first driving roller and the first driven roller, the second roller group includes a second driving roller and a second driven roller, the second driving roller and the second driven roller are arranged at intervals, the second conveyor belt is sleeved on the second driving roller and the second driven roller, and the rotation output end of the drive motor is connected to the first driving roller and the second driving roller respectively.

[0022] The lifting mechanism is respectively connected to the first driving roller, the first driven roller, the second driving roller and the second driven roller to adjust the distance between the first conveyor belt and the second conveyor belt.

[0023] In the preferred technical solution of the above-mentioned battery cell coating device, the lifting mechanism includes a first lifting mechanism and a second lifting mechanism, the first lifting mechanism includes a first driving member and a first lifting member, the output end of the first driving member is connected to one end of the first lifting member, and the other end of the first lifting member is connected to the second active roller, the second lifting mechanism includes a second driving member and a second lifting member, the output end of the second driving member is connected to one end of the second lifting member, and the other end of the second lifting member is connected to the second driven roller.

[0025] In a second aspect, the present invention further provides a battery cell coating method, the method comprising:

[0026] S100: placing the battery cell assembly on the first pressing belt of the conveying assembly;

[0027] S200: transporting the battery cell assembly to a predetermined position by the conveying assembly;

[0028] S300: heating the battery cell assembly by a heating assembly;

[0029] Wherein, when the battery cell assembly is located at the predetermined position, the bottom surface of the battery cell assembly abuts against the first pressing belt, the top surface of the battery cell assembly abuts against the second pressing belt, the first heating component is located on the side of the first pressing belt away from the battery cell assembly, and the second heating component is located on the side of the second pressing belt away from the battery cell assembly.

[0030] Those skilled in the art can understand that the technical solution of the present invention provides a battery cell film laminating device, including: a conveying assembly and a heating assembly. The conveying assembly has a first pressing belt and a second pressing belt. The first pressing belt can abut against the bottom surface of the battery cell assembly, and the second pressing belt can abut against the top surface of the battery cell assembly. The conveying assembly can transport the battery cell assembly to a predetermined position; the heating assembly includes a first heating member and a second heating member. The first heating member is arranged on the side of the first pressing belt away from the battery cell assembly, and the second heating member is arranged on the side of the second pressing belt away from the battery cell assembly. By heating the bottom surface and the top surface of the battery cell assembly respectively through the first heating member and the second heating member, the softening and curing process of the encapsulation film can be accelerated, thereby improving the film laminating effect; during the heating of the battery cell, a certain pressure is applied to the bottom surface and the top surface of the battery cell assembly through the first pressing belt and the second pressing belt, so that the film adheres better to the battery cell, forming a tight encapsulation, thereby effectively improving the film laminating effect of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings, in which:

[0032] Figure 1 is a schematic structural diagram of the battery cell assembly of the present invention;

[0033] Figure 2 is a schematic structural diagram of the battery cell film laminating device of the present invention;

[0034] Figure 3 is a flowchart of the battery cell film laminating method of the present invention.

[0035] LIST OF REFERENCE NUMERALS:

[0036] 1. Conveying assembly; 11. First conveyor belt; 111. First pressing belt; 12. Second conveyor belt; 121. Second pressing belt; 131. First driving roller; 132. First driven roller; 133. Second driving roller; 134. Second driven roller;

[0037] 2. Heating assembly; 21. First heating member; 22. Second heating member;

[0038] 3. Lifting mechanism; 31. First lifting mechanism; 311. First driving member; 312. First lifting member; 32. Second lifting mechanism; 321. Second driving member; 322. Second lifting member;

[0039] 4. Pressure sensor;

[0040] 5. Battery cell assembly; 51. First encapsulation film; 52. Upper interconnection bar; 53. Battery cell; 54. Lower interconnection bar; 55. Second encapsulation film. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. For example, although the following embodiments are introduced in combination with solar cell wafers, the film laminating device provided by the present invention is also applicable to other products that need to solve the problem of poor film laminating effect.

[0042] It should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] Based on the problem of poor film laminating effect of the existing solar cell module pointed out in the background art, the present invention provides a film laminating device for solar cell wafers, aiming to effectively solve the problem of poor film laminating effect of solar cell modules by heating both sides of the solar cell wafer simultaneously and applying pressure to both sides of the solar cell wafer through the first pressing belt and the second pressing belt.

[0044] First, refer to Figure 1 , where Figure 1 shows a schematic structural diagram of a solar cell module 5. Along the thickness direction of the solar cell module 5, from top to bottom are the first encapsulation film 51, the upper interconnection bar 52, the solar cell wafer 53, the lower interconnection bar 54, and the second encapsulation film 55. By removing the main grid lines on the solar cell wafer 53 and only retaining the fine grid lines, the solar cell module 5 not only greatly reduces the use of silver paste and lowers the material cost, but also increases the effective light-receiving area of the solar cell wafer 53, thereby improving the power generation efficiency of the photovoltaic module.

[0045] It should be noted that the structure of the solar cell module 5 of the present invention can achieve series connection between multiple solar cell modules 5 through the extension of the interconnection bars. Specifically, when the upper interconnection bar 52 of a solar cell module 5 extends downward to the vacant main grid position on the lower surface of the solar cell wafer 53 of an adjacent solar cell module 5, it can be used as the lower interconnection bar 54 of the latter. Similarly, when the lower interconnection bar 54 of a solar cell module 5 extends upward to the vacant main grid position on the upper surface of the solar cell wafer 53 of an adjacent solar cell module 5, it can be used as the upper interconnection bar 52 of the latter. This design cleverly utilizes the vacant main grid positions on the solar cell wafer 53 to achieve electrical connection between the modules, so that multiple solar cell modules 5 can be easily connected in series to form a battery string structure.

[0046] In the above-mentioned cell assembly 5, it is necessary to fix the upper interconnection strip 52 on the upper surface of the cell 53 through the first encapsulation film 51, and fix the lower interconnection strip 54 on the lower surface of the cell 53 through the second encapsulation film 55. However, currently, the conventional film covering method for fixing the film and the interconnection strip has the problem of insecure film covering. Especially at the starting soldering point of the cell interconnection strip, it is difficult to ensure effective film covering between the film and the interconnection strip, resulting in the film at the edge of the cell 53 warping, unable to effectively fix the interconnection strip, and seriously affecting the performance and reliability of the photovoltaic module.

[0047] To address the above problems, as Figure 2 shown, the present invention provides a cell film covering device, including: a conveying assembly 1 and a heating assembly 2. Among them, the conveying assembly 1 has a first pressing belt 111 and a second pressing belt 121. The first pressing belt 111 can abut against the bottom surface of the cell assembly 5, and the second pressing belt 121 can abut against the top surface of the cell assembly 5. The conveying assembly 1 can transport the cell assembly 5 to a predetermined position; the heating assembly 2 includes a first heating member 21 and a second heating member 22. The first heating member 21 is arranged on the side of the first pressing belt 111 away from the cell assembly 5, and the second heating member 22 is arranged on the side of the second pressing belt 121 away from the cell assembly 5.

[0048] The conveying assembly 1 has a first pressing belt 111 and a second pressing belt 121. The first pressing belt 111 can abut against the bottom surface of the cell assembly 5, and the second pressing belt 121 can abut against the top surface of the cell assembly 5, so that pressure can be applied to both sides of the cell assembly 5 simultaneously, thereby ensuring effective bonding between the encapsulation film and the cell 53 and the interconnection strip, and avoiding warping and peeling. The conveying assembly 1 is responsible for transporting the cell assembly 5 to a predetermined position for heating and pressing operations.

[0049] The heating assembly 2 includes a first heating member 21 and a second heating member 22. The first heating member 21 is arranged on the side of the first pressing belt 111 away from the cell assembly 5 and is used to heat the bottom surface of the cell assembly 5. The second heating member 22 is arranged on the side of the second pressing belt 121 away from the cell assembly 5 and is used to heat the top surface of the cell assembly 5. By heating both sides of the cell assembly 5 simultaneously, the softening and curing process of the encapsulation film can be accelerated, thereby improving the film covering effect.

[0050] During operation, the solar cell assembly 5 is placed on the conveying assembly 1 and conveyed to a predetermined position. At this predetermined position, the first pressing belt 111 and the second pressing belt 121 are respectively in contact with the bottom surface and the top surface of the solar cell assembly 5, and apply a certain pressure to the bottom surface and the top surface of the solar cell assembly 5. At the same time, the first heating member 21 and the second heating member 22 respectively heat the bottom surface and the top surface of the solar cell assembly 5. As the temperature rises, the encapsulation adhesive film begins to soften. Under the pressure of the first pressing belt 111 and the second pressing belt 121, the encapsulation adhesive film is tightly bonded to the solar cell 53 and the interconnection bars. Then, the solar cell assembly 5 is conveyed away from the predetermined position by the conveying assembly 1, and the encapsulation adhesive film cools and solidifies to form a firm bonding layer.

[0051] Thus, the solar cell film laminating device provided by the present invention can press both sides of the solar cell assembly 5 while heating the solar cell assembly 5, ensuring a tight bond between the encapsulation adhesive film, the solar cell 53, and the interconnection bars, especially at the starting soldering points of the solar cell interconnection bars, thereby improving the performance and reliability of the photovoltaic module.

[0052] It should be noted that the heating methods of the first heating member 21 and the second heating member 22 can be set according to the design of the solar cell assembly 5 production line and the heating requirements. For example, the first heating member 21 and the second heating member 22 can be heated by electric heating, infrared heating, electromagnetic wave heating, heat transfer oil heating, etc. The present invention does not specifically limit the heating methods of the first heating member 21 and the second heating member 22.

[0053] Furthermore, the heat sources of the first heating member 21 and the second heating member 22 can be one heat source or two heat sources.

[0054] When the design of the heating assembly 2 allows the first heating member 21 and the second heating member 22 to share one heat source, then the first heating member 21 and the second heating member 22 can be connected to a common heat source in a certain way (such as a heat conduction pipeline, a heat radiation plate, etc.). In this case, the heat generated by the heat source will be simultaneously transferred to the first heating member 21 and the second heating member 22, thereby achieving the heating effect. This design can simplify the structure of the heating assembly 2, reduce the manufacturing cost, and may improve the heating efficiency (because the heat can be shared between the first heating member 21 and the second heating member 22).

[0055] When the heating assembly 2 requires more precise temperature control or heating area division, then the first heating member 21 and the second heating member 22 can be respectively connected to two different heat sources. In this case, each heat source can independently control the temperature and heating power of its corresponding heating member, thereby achieving more precise heating control. This design can provide more flexible heating options to meet the needs of different application scenarios.

[0056] The first heating member 21 and the second heating member 22 are one heat source or two heat sources, depending on specific design requirements and application scenarios. When making a selection, factors such as heating requirements, cost considerations, and space limitations need to be comprehensively considered. The present invention does not make specific limitations in this regard.

[0057] Preferably, along the transmission direction of the cell assembly 5, the first heating member 21 is sequentially provided with a preheating zone, a heating zone, and a cooling zone, and / or, along the transmission direction of the cell assembly 5, the second heating member 22 is sequentially provided with a preheating zone, a heating zone, and a cooling zone; wherein, the temperature of the heating zone is greater than the temperatures of the preheating zone and the cooling zone.

[0058] The preheating zone is located at the initial position where the cell assembly 5 enters the heating assembly 2, and its temperature is relatively low. The main function of the preheating zone is to gradually raise the temperature of the cell assembly 5 and the encapsulation adhesive film thereon, avoiding excessive material stress or damage caused by sudden temperature changes. The heating zone is located after the preheating zone, and its temperature is greater than that of the preheating zone, thereby being sufficient to completely soften the encapsulation adhesive film and tightly bond it with the cell 53 and the interconnection bars, ensuring that the adhesive film can completely melt and penetrate into the tiny gaps between the cell 53 and the interconnection bars. The heating zone ensures the heat supply required during the film laminating process and is a key area for achieving efficient film laminating. The cooling zone is located after the heating zone, and its temperature is less than that of the heating zone, and is used to start cooling and preliminarily curing the encapsulation adhesive film before it leaves the heating assembly 2. The cooling zone helps to stabilize the film laminating effect and prevent the cell assembly 5 from being affected by temperature fluctuations during subsequent operations.

[0059] During operation, the cell assembly 5 is placed on the conveying assembly 1 and sequentially passes through the preheating zone, the heating zone, and the cooling zone. In the preheating zone, the cell assembly 5 gradually heats up to prepare for the subsequent heating process. After entering the heating zone, the encapsulation adhesive film is fully softened and tightly bonded with the cell 53 and the interconnection bars. Finally, in the cooling zone, the encapsulation adhesive film starts to cool and preliminarily cure, forming a firm bonding layer.

[0060] By setting different temperatures in different heating regions, precise temperature control of the cell assembly 5 can be achieved, thereby meeting the requirements of different processing stages and improving the film laminating effect.

[0061] Preferably, the temperatures of the heating zone, the preheating zone, and the cooling zone in the present invention decrease in sequence. That is, on the basis that the temperature of the heating zone is greater than those of the preheating zone and the cooling zone, the temperature of the cooling zone is also less than that of the preheating zone.

[0062] By setting the temperature of the cooling zone to be less than that of the preheating zone, after the heating process of the encapsulation adhesive film ends, the encapsulation adhesive film can be cooled quickly and smoothly. By gradually reducing the temperature, the thermal stress generated by the encapsulation adhesive film due to rapid cooling can be avoided, thereby further improving the film laminating effect.

[0063] Furthermore, the temperature control of the preheating zone, heating zone, and cooling zone in the present invention is independent of each other. Thus, the temperature of each zone can be set and adjusted individually according to actual needs. This design of independent temperature control makes the film laminating process more flexible and efficient. Exemplarily, the preheating zone, heating zone, and cooling zone are all equipped with independent temperature controllers, which can monitor and adjust the temperature of the zone in real time. Ensure the accuracy and stability of temperature control, and avoid film laminating quality problems caused by temperature fluctuations.

[0064] In addition, the number of the preheating zone, heating zone, and cooling zone can be flexibly set according to actual production requirements and the characteristics of the battery cell assembly 5. For example, the number of the preheating zone, heating zone, and cooling zone can be adjusted according to the length of the production line, the size of the battery cell assembly 5, and the characteristics of the encapsulation adhesive film. For large-size or high-requirement battery cell assemblies 5, the number of heating zones can be increased to ensure sufficient heating; for temperature-sensitive materials, the number of preheating zones and cooling zones can be increased to achieve a more stable temperature transition. The present invention does not make a specific limitation on the number of the preheating zone, heating zone, and cooling zone.

[0065] Preferably, as Figure 2 shown, the first heating member 21 abuts against the first pressing belt 111, and / or, the second heating member 22 abuts against the second pressing belt 121.

[0066] When the heating assembly 2 directly abuts against the pressing belt, the heat transfer path is significantly shortened, thereby reducing heat loss and improving heating efficiency. In addition, the direct-contact heating method can ensure that the heat is more evenly distributed on the battery cell assembly 5, avoiding local overheating or insufficient heating, which helps to form a stronger bonding force during the pressing process, enabling the encapsulation adhesive film to adhere more firmly to the battery cell 53 and improving the film laminating quality.

[0067] Preferably, as Figure 2 shown, the conveying assembly 1 includes a first conveyor belt 11, a second conveyor belt 12, and a driving mechanism (not shown in the figure). The first conveyor belt 11 and the second conveyor belt 12 are arranged at intervals. The first conveyor belt 11 is the first pressing belt 111, and the second conveyor belt 12 is the second pressing belt 121. The driving mechanism can drive the first conveyor belt 11 and the second conveyor belt 12 to perform a closed-loop circular motion, and the first conveyor belt 11 and the second conveyor belt 12 perform synchronous diameter motion.

[0068] The first conveyor belt 11 and the second conveyor belt 12 are spaced apart and respectively carry two sides of the battery cell assembly 5, playing a role in supporting and transporting during the heating and pressing processes. The first conveyor belt 11 is the first pressing belt 111, and the second conveyor belt 12 is the second pressing belt 121. Such a layout enables the battery cell assembly 5 to be heated and pressed on both the upper and lower sides simultaneously during transportation, ensuring uniform pressing and heating treatment of the battery cell assembly 5 during transportation. In addition, the contact areas between the first conveyor belt 11 and the second conveyor belt 12 and the upper and lower sides of the battery cell assembly 5 are large, enabling the upper and lower surfaces of the battery cell assembly 5 to be in close contact with the pressing surfaces, not easily causing hidden cracks and fragmentation of the battery cells 53, and ensuring the yield of the battery cell assembly 5.

[0069] It should be noted that when the first conveyor belt 11 is designed as the first pressing belt 111 and the second conveyor belt 12 is designed as the second pressing belt 121, the first conveyor belt 11 and the second conveyor belt 12 have dual functions in the battery cell film laminating device: one is as a transmission mechanism, responsible for transporting the battery cell assembly from one place to another; the other is as a pressing mechanism, promoting the tight bonding of the encapsulation film and the battery cell assembly by applying pressure. This design helps to improve the quality and efficiency of film lamination.

[0070] The driving mechanism is the core component of the conveying assembly 1. It is responsible for driving the first conveyor belt 11 and the second conveyor belt 12 to perform a closed-loop movement, continuously transporting the battery cell assembly 5 from one end to the other. This design improves production efficiency and ensures continuous processing of the battery cell assembly 5. Moreover, the driving mechanism can ensure synchronous movement of the first conveyor belt 11 and the second conveyor belt 12, that is, the first conveyor belt 11 and the second conveyor belt 12 always maintain the same speed and positional relationship during movement. This ensures that the battery cell assembly 5 will not be distorted or damaged during transportation, that is, it ensures that there is no relative displacement between the encapsulation films on both sides of the battery cell 53, enabling the encapsulation film to adhere more firmly to the battery cell 53 and avoiding the problem of warping of the encapsulation film at the edge of the battery cell 53, further improving the film lamination quality.

[0071] Preferably, the driving mechanism includes a driving motor (not shown in the figure), a first roller group, and a second roller group. The driving motor can drive the first roller group and the second roller group to rotate. The first conveyor belt 11 is sleeved on the first roller group and can perform a closed-loop movement around the first roller group. The second conveyor belt 12 is sleeved on the second roller group and can perform a closed-loop movement around the second roller group.

[0072] The drive motor is the power source of the drive mechanism. It is responsible for providing sufficient torque and speed to drive the first roller group and the second roller group to rotate. By adjusting the speed and direction of the drive motor, the movement speed and direction of the conveyor belt can also be controlled, so as to meet different production requirements. Exemplarily, the drive motor can adopt a high-performance DC motor or AC motor, which has advantages such as a wide speed regulation range, stable operation, and low noise. The present invention does not make specific limitations on the type of the drive motor.

[0073] When the drive motor starts, it first drives the first roller group and the second roller group to rotate. As the roller groups rotate, the first conveyor belt 11 and the second conveyor belt 12 respectively make a closed circular motion around the roller groups. The battery cell assembly 5 is placed between the first conveyor belt 11 and the second conveyor belt 12 and advances as the conveyor belt moves. During the advancing process, the predetermined position of the battery cell assembly 5 is heated by the first heating member 21 and the second heating member 22 and pressed by the first conveyor belt 11 and the second conveyor belt 12 to complete the film covering of the battery cell 53.

[0074] Preferably, as Figure 2 shown, the first roller group includes a first driving roller 131 and a first driven roller 132. The first driving roller 131 and the first driven roller 132 are arranged at intervals. The first conveyor belt 11 is sleeved on the first driving roller 131 and the first driven roller 132. The second roller group includes a second driving roller 133 and a second driven roller 134. The second driving roller 133 and the second driven roller 134 are arranged at intervals. The second conveyor belt 12 is sleeved on the second driving roller 133 and the second driven roller 134. The rotary output ends of the drive motor are respectively connected to the first driving roller 131 and the second driving roller 133.

[0075] When the system receives a start signal, the drive motor starts to rotate. The rotating drive motor drives the first driving roller 131 and the second driving roller 133 to rotate through a transmission device (such as a belt, a chain, etc.). As the first driving roller 131 and the second driving roller 133 rotate, they respectively drive the first conveyor belt 11 and the second conveyor belt 12 to move through friction. The battery cell assembly 5 on the conveyor belt advances as the conveyor belt moves and reaches a predetermined position.

[0076] In addition, since the rotary output ends of the drive motor are simultaneously connected to the first driving roller 131 and the second driving roller 133, it is possible to ensure that the two conveyor belts run at the same speed or a coordinated speed. This synchronous or coordinated operation mode ensures that the battery cell assembly 5 is smoothly and evenly pressed and heated during the transmission process, further avoiding the problem of warping of the encapsulation film at the edge of the battery cell 53, and at the same time improving the structural compactness and reliability of the entire conveying assembly 1.

[0077] Preferably, asFigure 2 As shown, the battery cell film laminating device further includes a lifting mechanism 3, and the lifting mechanism 3 can adjust the distance between the first pressing belt 111 (the first conveyor belt 11) and the second pressing belt 121 (the second conveyor belt 12).

[0078] In actual production, the thickness of the battery cells 53 will vary. By adjusting the lifting mechanism 3, the distance between the first pressing belt 111 (the first conveyor belt 11) and the second pressing belt 121 (the second conveyor belt 12) can be easily adjusted to adapt to battery cells 53 of different thicknesses, thereby ensuring that each battery cell 53 can obtain the best pressing effect and improving the applicability of the battery cell film laminating device. In addition, appropriate pressing pressure is a key factor to ensure the tight bonding between the encapsulation film and the battery cell 53. In the present invention, by adjusting the lifting mechanism 3 to change the distance between the first pressing belt 111 and the second pressing belt 121, the pressing pressure can be indirectly adjusted to avoid the hidden cracks and fragmentation of the battery cells 53 caused by excessive pressure, so as to achieve the best pressing effect.

[0079] Preferably, as Figure 2 shown, the lifting mechanism 3 includes a first lifting mechanism 31 and a second lifting mechanism 32. The first lifting mechanism 31 includes a first driving member 311 and a first lifting member 312. The output end of the first driving member 311 is connected to one end of the first lifting member 312, and the other end of the first lifting member 312 is connected to the second driving roller 133. The second lifting mechanism 32 includes a second driving member 321 and a second lifting member 322. The output end of the second driving member 321 is connected to one end of the second lifting member 322, and the other end of the second lifting member 322 is connected to the second driven roller 134.

[0080] The other end of the first lifting member 312 is connected to the second driving roller 133, and the other end of the second lifting member 322 is connected to the second driven roller 134. This connection method enables the lifting mechanism 3 to directly act on the roller group, thereby changing the height of the second conveyor belt 12. At the same time, since the second driving roller 133 and the second driven roller 134 are respectively located at both ends of the second conveyor belt 12, this connection method can ensure that the second conveyor belt 12 remains stable during the lifting process. In addition, by independently controlling the first lifting mechanism 31 and the second lifting mechanism 32, we can precisely adjust the distance between the first conveyor belt 11 and the second conveyor belt 12 to adapt to battery cell assemblies 5 of different thicknesses.

[0081] Preferably, as Figure 2 shown, the battery cell film laminating device further includes a plurality of pressure sensors 4. The pressure sensors 4 can detect the pressure of the battery cell assembly 5, and the pressure sensors 4 are signal-connected to the lifting mechanism 3.

[0082] The main function of the pressure sensor 4 is to detect the pressure exerted on the cell assembly 5 during the lamination process. This is one of the key factors to ensure a tight bond between the cell 53 and the adhesive film, as appropriate pressure can ensure that the adhesive film fully covers the cell 53 while avoiding damage to the cell 53. By installing multiple pressure sensors 4, the pressure distribution of the cell assembly 5 during the lamination process can be monitored in real time. This helps to promptly detect and solve potential lamination problems, such as poor lamination caused by insufficient or excessive pressure.

[0083] When abnormal pressure is detected, the lifting mechanism 3 can automatically adjust the spacing between the first lamination belt 111 (the first conveyor belt 11) and the second lamination belt 121 (the second conveyor belt 12) to restore the normal lamination pressure. This automatic adjustment function can significantly improve production efficiency while reducing the reject rate caused by poor lamination. By monitoring and adjusting the lamination pressure in real time, it can ensure that each cell assembly 5 can obtain a consistent lamination effect, thus improving the lamination quality.

[0084] In addition, as Figure 3 shown, the present invention also provides a method for laminating the film on the cell 53, which includes:

[0085] S100: Place the cell assembly 5 on the first lamination belt 111 of the conveying assembly 1;

[0086] S200: Convey the cell assembly 5 to a predetermined position through the conveying assembly 1;

[0087] S300: Heat the cell assembly 5 through the heating assembly 2;

[0088] Wherein, when the cell assembly 5 is at the predetermined position, the bottom surface of the cell assembly 5 abuts against the first lamination belt 111, the top surface of the cell assembly 5 abuts against the second lamination belt 121, the first heating member 21 is located on the side of the first lamination belt 111 away from the cell assembly 5, and the second heating member 22 is located on the side of the second lamination belt 121 away from the cell assembly 5.

[0089] The battery cell assembly 5 is placed on the first lamination belt 111 of the conveying assembly 1, thereby ensuring that the battery cell assembly 5 can remain stable during the subsequent conveying and lamination process. After the battery cell assembly 5 is placed, the conveying assembly 1 will start working to convey the battery cell assembly 5 from the first lamination belt 111 to a predetermined position, that is, the place where the battery cell assembly 5 contacts the second lamination belt 121 and starts to heat. When the battery cell assembly 5 reaches the predetermined position, the heating assembly 2 starts to work. Since the first heating component 21 is located on the side of the first lamination tape 111 away from the battery cell assembly 5, and the second heating component 22 is located on the side of the second lamination tape 121 away from the battery cell assembly 5, it can ensure that the bottom and top surfaces of the battery cell assembly 5 can be evenly heated, thereby accelerating the softening of the adhesive film and the combination with the battery cell 53; in addition, since the bottom surface of the battery cell assembly 5 abuts against the first lamination tape 111, and the top surface of the battery cell assembly 5 abuts against the second lamination tape 121, during the heating process of the battery cell 53, the first lamination tape 111 and the second lamination tape 121 apply appropriate pressure to the bottom and top surfaces of the battery cell assembly 5. This pressure helps the adhesive film to better fit the battery cell 53 to form a tight package, thereby significantly improving the quality of the coating of the battery cell 53.

[0090] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A battery cell coating device, characterized in that: include: A conveying assembly (1), the conveying assembly (1) comprising a first pressing belt (111) and a second pressing belt (121), the first pressing belt (111) being capable of abutting against the bottom surface of a battery cell assembly (5), the second pressing belt (121) being capable of abutting against the top surface of the battery cell assembly (5), the conveying assembly (1) being capable of conveying the battery cell assembly (5) to a predetermined position; A heating assembly (2), the heating assembly (2) comprising a first heating component (21) and a second heating component (22), the first heating component (21) being arranged on a side of the first pressing belt (111) facing away from the battery cell assembly (5), and the second heating component (22) being arranged on a side of the second pressing belt (121) facing away from the battery cell assembly (5).

2. The cell film coating device according to claim 1, characterized in that: Along the transmission direction of the battery cell assembly (5), the first heating component (21) is sequentially provided with a preheating zone, a heating zone and a cooling zone, and / or Along the transmission direction of the battery cell assembly (5), the second heating component (22) is sequentially provided with a preheating zone, a heating zone and a cooling zone; Wherein, the temperature of the heating zone is greater than the temperatures of the preheating zone and the cooling zone.

3. The cell film coating device according to claim 1, characterized in that: The first heating member (21) abuts against the first pressing belt (111), and / or, The second heating member (22) is in contact with the second pressing belt (121).

4. The cell film coating device according to claim 1, characterized in that: The battery cell coating device also includes a lifting mechanism (3), and the lifting mechanism (3) is capable of adjusting the distance between the first pressing belt (111) and the second pressing belt (121).

5. The cell film coating device according to claim 4, characterized in that: The battery cell coating device also includes a plurality of pressure sensors (4), the pressure sensors (4) being capable of detecting the pressure of the battery cell assembly (5), and the pressure sensors (4) being connected to the lifting mechanism (3) by signals, and the lifting mechanism (3) being capable of adjusting the spacing between the first pressing belt (111) and the second pressing belt (121) according to the signals fed back by the pressure sensors (4).

6. The cell film coating device according to claim 4, characterized in that: The conveying assembly (1) comprises a first conveyor belt (11), a second conveyor belt (12) and a driving mechanism, wherein the first conveyor belt (11) and the second conveyor belt (12) are arranged at intervals, the first conveyor belt (11) is the first pressing belt (111), and the second conveyor belt (12) is the second pressing belt (121), and the driving mechanism is capable of driving the first conveyor belt (11) and the second conveyor belt (12) to perform closed loop motion, and the first conveyor belt (11) and the second conveyor belt (12) perform synchronous radial motion, The lifting mechanism (3) is connected to the driving mechanism, and the lifting mechanism (3) can drive the driving mechanism to move so as to adjust the distance between the first conveyor belt (11) and the second conveyor belt (12).

7. The cell film coating device according to claim 6, characterized in that: The driving mechanism comprises a driving motor and a first roller group and a second roller group, the driving motor can drive the first roller group and the second roller group to rotate, the first conveyor belt (11) is sleeved on the first roller group, the first conveyor belt (11) can make a closed loop motion around the first roller group, the second conveyor belt (12) is sleeved on the second roller group, the second conveyor belt (12) can make a closed loop motion around the second roller group, The lifting mechanism (3) can be connected to the first roller group and the second roller group respectively to adjust the distance between the first conveyor belt (11) and the second conveyor belt (12).

8. The cell film coating device according to claim 7, characterized in that: The first roller group comprises a first active roller (131) and a first driven roller (132), the first active roller (131) and the first driven roller (132) are arranged at intervals, the first conveyor belt (11) is sleeved on the first active roller (131) and the first driven roller (132), the second roller group comprises a second active roller (133) and a second driven roller (134), the second active roller (133) and the second driven roller (134) are arranged at intervals, the second conveyor belt (12) is sleeved on the second active roller (133) and the second driven roller (134), the rotation output end of the driving motor is connected to the first active roller (131) and the second active roller (133) respectively, The lifting mechanism (3) is respectively connected to the first active roller (131), the first driven roller (132), the second active roller (133) and the second driven roller (134) to adjust the distance between the first conveyor belt (11) and the second conveyor belt (12).

9. The cell film coating device according to claim 8, characterized in that: The lifting mechanism (3) comprises a first lifting mechanism (31) and a second lifting mechanism (32); the first lifting mechanism (31) comprises a first driving member (311) and a first lifting member (312); the output end of the first driving member (311) is connected to one end of the first lifting member (312); the other end of the first lifting member (312) is connected to the second active roller (133); the second lifting mechanism (32) comprises a second driving member (321) and a second lifting member (322); the output end of the second driving member (321) is connected to one end of the second lifting member (322); the other end of the second lifting member (322) is connected to the second driven roller (134).

10. A method for coating a battery cell (53), characterized in that: The method comprises: S100: placing a battery cell assembly (5) on a first pressing belt (111) of a conveying assembly (1); S200: transporting the battery cell assembly (5) to a predetermined position via the conveying assembly (1); S300: heating the battery cell assembly (5) by means of a heating assembly (2); Wherein, when the battery cell assembly (5) is located at the predetermined position, the bottom surface of the battery cell assembly (5) abuts against the first pressing belt (111), the top surface of the battery cell assembly (5) abuts against the second pressing belt (121), the first heating component (21) is located on the side of the first pressing belt (111) facing away from the battery cell assembly (5), and the second heating component (22) is located on the side of the second pressing belt (121) facing away from the battery cell assembly (5).

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