Heating roller and battery piece welding equipment
By designing the heating roller and conveying assembly to work in synergy, efficient welding of solar cells and welding strips was achieved, solving the problems of unstable quality and high cost in traditional welding technology, improving welding efficiency and reducing the risk of warping and cracking of solar cells.
Patent Information
- Application Number
- CN202423322141.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Traditional solar cell welding technology suffers from problems such as unstable welding quality, high equipment energy consumption, complex operation, and high maintenance costs. Furthermore, it is difficult to achieve precise temperature and pressure control, which makes the welded solar cells prone to warping or cracking.
A heating roller is designed, comprising an annular groove and a heating element. The welding strip and welding layer are stacked in the annular groove. The welding layer is heated by the heating element to melt it and adhere it to the battery cell. Welding is achieved by combining the conveying assembly and the rotation of the heating roller, ensuring a tight connection between the welding strip and the battery cell.
It improves welding efficiency, reduces maintenance costs, avoids cell warping or cracking, and ensures welding quality and cell reliability.
Smart Images
Figure CN223889102U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic equipment technology, and more specifically, to a heating roller and a battery cell welding device. Background Technology
[0002] Cell welding is a critical step in the production of solar cells, directly affecting the electrical performance and reliability of the cell modules. Traditional cell welding technology mainly relies on hot air welding. Hot air welding melts the welding strip with high-temperature hot air to connect the cell to the welding strip, but this method has problems such as a large heat-affected zone, unstable welding quality, and high equipment energy consumption.
[0003] In existing solar cell welding technologies, the design of welding equipment often neglects the thermal expansion and stress distribution of materials during the welding process, leading to problems such as warping and cracking in the welded cells. Furthermore, traditional welding equipment struggles to achieve precise temperature and pressure control during the welding process, making it difficult to guarantee weld quality, and the equipment is complex to operate and has high maintenance costs.
[0004] To address the above problems, this technical solution proposes a battery cell welding device. Utility Model Content
[0005] The purpose of this utility model is to provide a heating roller and a battery cell welding equipment, which has a simple structure, high welding efficiency, and low maintenance cost.
[0006] The embodiments of this utility model can be implemented as follows:
[0007] In a first aspect, the present invention provides a heating roller, which includes a body and at least one heating element. The outer peripheral surface of the body is provided with at least one annular groove around its axial direction. The annular groove is used to accommodate the welding strip and the welding layer.
[0008] The bottom of the annular groove houses the heating element; or, the heating element is located inside the main body.
[0009] In this arrangement, along the radial direction of the heating roller, the welding strips and welding layers located in the same annular groove are stacked from the inside out.
[0010] In an optional embodiment, there are multiple annular grooves, which are spaced apart along the axial direction of the body; each annular groove is used to accommodate the welding strip and the welding layer.
[0011] In an optional embodiment, the body is provided with at least one receiving cavity, which receives a plurality of heating elements.
[0012] In an optional embodiment, there are multiple accommodating cavities, which are spaced apart along the axial direction of the body, and each accommodating cavity houses at least one heating element.
[0013] In an optional embodiment, the heating roller further includes a temperature sensor connected to the inner wall of the accommodating cavity.
[0014] In an alternative embodiment, the depth of the annular groove is less than the thickness of the solder strip.
[0015] In an optional implementation, the melting point of the weld layer is lower than that of the weld strip.
[0016] Secondly, this utility model provides a battery cell welding device, which includes a conveying assembly, a frame, and the aforementioned heating roller; the conveying assembly is used to convey battery cells along the conveying direction; the main body is rotatably connected to the frame;
[0017] The heating roller is used to weld the welding layer and welding strip stacked in the annular groove to the battery cell.
[0018] In an optional embodiment, the cell welding equipment further includes a driver; the frame includes a transmission rod and a support rod; the transmission rod passes through the body, and its two ends are rotatably connected to the support rod and the driver, respectively.
[0019] In an optional embodiment, the conveying assembly includes a conveying platform and a conveyor belt, the conveyor belt being movably coupled to the conveying platform; the conveyor belt is used to convey the battery cells along the conveying direction.
[0020] The beneficial effects of the heating roller and battery cell welding equipment provided in this embodiment of the invention include:
[0021] The heating roller includes a body and at least one heating element. The outer circumferential surface of the body is provided with at least one annular groove around its axis. The annular groove is used to accommodate the welding strip and the welding layer. The bottom of the annular groove accommodates the heating element; or, the heating elements are all disposed inside the body. In the radial direction of the heating roller, the welding strip and the welding layer located in the same annular groove are stacked from the inside to the outside.
[0022] The heating roller's body can move and engage with the solar cell. The annular groove contains a welding strip and a welding layer. During the moving engagement of the body and the solar cell, the heating element heats the welding layer, causing it to melt and adhere to the solar cell through the inner wall of the annular groove. During the moving engagement, the welding strip moves from the annular groove onto the solar cell and is welded to the cell by the welding layer that has solidified on the cell surface. This heating roller can weld the welding strip to the solar cell and has a simple structure, high welding efficiency, and low maintenance costs. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of the battery cell welding equipment provided in this embodiment;
[0025] Figure 2 This is a cross-sectional schematic diagram of the heating roller provided in this embodiment;
[0026] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;
[0027] Figure 4 A cross-sectional schematic diagram of the heating roller provided for other embodiments;
[0028] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.
[0029] Icons: 100-Heating roller; 110-Body; 111-Annular groove; 112-Accommodation cavity; 120-Heating element; 130-Temperature sensor; 200-Battery cell welding equipment; 210-Conveying assembly; 211-Conveying platform; 212-Conveyor belt; 220-Frame; 221-Drive rod; 222-Support rod; 230-Driver; 310-Welding strip; 320-Welding layer; 330-Battery cell. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0034] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0035] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0036] Please refer to Figures 1-3 , Figure 1 This is a schematic diagram of the structure of the battery cell welding equipment 200 provided in this embodiment; Figure 2 This is a cross-sectional schematic diagram of the heating roller 100 provided in this embodiment; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.
[0037] This utility model provides a battery cell welding device 200, which includes a battery cell 330, a conveying assembly 210, a frame 220, a welding strip 310, and a heating roller 100. The heating roller 100 includes a body 110 and a plurality of heating elements 120. The conveying assembly 210 is used to convey the battery cell 330 along the conveying direction. The body 110 is rotatably connected to the frame 220. The heating roller 100 is used to weld the welding layer 320 and the welding strip 310 stacked in the annular groove 111 to the battery cell 330.
[0038] In this embodiment, at least one annular groove 111 is provided on the outer peripheral surface of the body 110 around its axial direction. The annular groove 111 is used to accommodate the welding strip 310 and the welding layer 320. At least one heating element 120 is accommodated at the bottom of the annular groove 111; or, multiple heating elements 120 are disposed inside the body 110. In this embodiment, along the radial direction of the heating roller 100, the welding strip 310 and the welding layer 320 located in the same annular groove 111 are stacked from the inside to the outside.
[0039] Specifically, as the battery cell 330 moves along the conveying direction via the conveying assembly 210, the battery cell 330 slides relative to the heating roller 100. Since the heating roller 100 is rotatably connected to the frame 220, it can rotate relative to the frame 220, thereby allowing the outer peripheral surface of the heating roller 100 to act on the battery cell 330 during its movement along the conveying direction.
[0040] The body 110 is provided with an annular groove 111, and the annular groove 111 contains a welding strip 310. In order to enable the welding strip 310 to be welded together with the battery cell 330, the annular groove 111 in this embodiment is provided on the outer peripheral surface of the body 110 of the heating roller 100, so that the welding strip 310 can contact the battery cell 330 during the process of the outer peripheral surface of the body 110 acting on the battery cell 330.
[0041] In this embodiment, a welding layer 320 is also accommodated within the annular groove 111. The welding layer 320 is connected to the inner wall of the annular groove 111 and covers the welding strip 310. Since the heating roller 100 is located above the battery cell 330, during the contact between the welding strip 310 and the battery cell 330, the heating element 120 heats the welding layer 320, causing the welding layer 320 to melt. Subsequently, the molten welding layer 320 will leave the annular groove 111 under the influence of gravity and adhere to the battery cell 330.
[0042] Understandably, in this embodiment, the welding layer 320 is heated by the heating element 120, thereby melting the welding layer 320, and then the welding strip 310 and the battery cell 330 are welded using the welding layer 320. Specifically, since the heating element 120 in this embodiment is located inside the body 110, the heating element 120 heats the body 110, and then the body 110 transfers the heat to the welding layer 320.
[0043] It should be noted that in this embodiment, the solder strip 310 is composed of a mixture of tin and lead, while the solder layer 320 is composed of a mixture of tin, lead, and bismuth. Specifically, because bismuth has a low melting point, the melting point of the solder layer 320 is lower than that of the solder strip 310. Therefore, the heating temperature range of the heating element 120 in this embodiment is located between the melting point of the solder layer 320 and the melting point of the solder strip 310, so that the solder layer 320 melts while the solder strip 310 does not melt.
[0044] The working principle of the battery cell welding equipment 200 is as follows:
[0045] In this embodiment, the frame 220 and the heating roller 100 are rotatably connected, allowing the heating roller 100 to rotate. The conveying assembly 210 conveys the battery cell 330 along the conveying direction, thereby enabling the outer circumferential surface of the heating roller 100 to move and engage with the battery cell 330. Since the welding ribbon 310 is housed in the annular groove 111, during the moving engagement process, the welding ribbon 310 will come into contact with the battery cell 330. At this time, the molten welding layer 320 detaches from the annular groove 111 and adheres to the battery cell 330. However, the molten welding layer 320 always adheres to at least a portion of the welding ribbon 310, so that after the temperature of the welding layer 320 decreases and it gradually solidifies, it can connect the welding ribbon 310 and the battery cell 330 together, thereby achieving the purpose of welding the welding ribbon 310 to the battery cell 330.
[0046] Therefore, the battery cell welding equipment 200 can move the battery cell 330 by the rotation of the heating roller 100 and the conveying component 210, so that the outer peripheral surface of the heating roller 100 and the battery cell 330 can move together to complete the welding, thereby improving the welding efficiency.
[0047] Understandably, since the weld layer 320 is detached from the body 110, and the temperature of the battery cell 330 and the temperature of the external environment are lower than the temperature of the weld layer 320 in the molten state, the heat of the weld layer 320 will be transferred to the battery cell 330 and the external environment, thereby causing the weld layer 320 to solidify and thus welding the welding strip 310 and the battery cell 330 together.
[0048] It should be noted that during the welding process, the heating roller 100 and the conveying assembly 210 work together to squeeze the welding strip 310 and the battery cell 330, so that the welding strip 310 and the battery cell 330 are tightly attached, thereby avoiding poor welding effect due to the movement of the welding strip 310 relative to the battery cell 330, and thus avoiding poor conductivity of the welded battery cell 330.
[0049] Since the heating element 120 heats the welding layer 320, the welding layer 320 is in a molten state. The molten welding layer 320 has a certain deformation space, which can play a buffering role and reduce the pressure of the heating roller 100 on the battery cell 330, thereby preventing the battery cell 330 from warping or cracking due to excessive pressure.
[0050] In this embodiment, there are multiple annular grooves 111, which are spaced apart along the axial direction of the heating roller 100, and the distance between any two adjacent annular grooves 111 is equal. Understandably, when welding the battery cell 330, multiple welding ribbons 310 need to be welded onto the battery cell 330. Each welding ribbon 310 corresponds one-to-one with one of the multiple annular grooves 111, thereby enabling the multiple welding ribbons 310 to be welded to the battery cell 330 simultaneously, thus improving welding efficiency.
[0051] Furthermore, since the spacing between each pair of adjacent annular grooves 111 is equal, the multiple solder strips 310 of the welded battery cell 330 are also spaced apart, and the spacing between each pair of adjacent solder strips 310 is equal, thereby avoiding short circuits.
[0052] Based on the above, in this embodiment, please refer to... Figure 3 The thickness of the welding strip 310 is H1, and the groove depth of the annular groove 111 is H2, where H1 > H2, so that the outer peripheral surface of the body 110 will not directly contact the battery cell 330, thereby avoiding direct pressure transmission to the battery cell 330 and preventing the battery cell 330 from warping or cracking.
[0053] Furthermore, in this embodiment, the body 110 has a plurality of accommodating cavities 112 spaced apart along its axial direction, and each accommodating cavity 112 accommodates at least one heating element 120.
[0054] Understandably, the heating efficiency of the weld layer 320 near the end of the body 110 is lower than that of the weld layer 320 near the middle of the body 110. Therefore, the number of heating elements 120 in the accommodating cavity 112 near the end of the body 110 is greater than the number of heating elements 120 in the accommodating cavity 112 near the middle of the body 110, thereby ensuring temperature uniformity. As a result, the weld layer 320 in each annular groove 111 can melt synchronously, thereby ensuring welding efficiency.
[0055] It should be noted that the body 110 of the heating roller 100 in this embodiment is made of a material with high thermal conductivity, such as tungsten steel, to improve heating efficiency. Furthermore, the surface of the body 110 has a nano-scale ceramic coating to improve heating efficiency and anti-adhesion properties, allowing the molten welding layer 320 to quickly detach and adhere to the battery cell 330, thereby improving welding efficiency.
[0056] Please refer to Figure 4 and Figure 5 , Figure 4 A cross-sectional schematic diagram of the heating roller 100 provided for other embodiments; Figure 5 for Figure 4A partial enlarged view at point B. In other embodiments, at least one heating element 120 can be accommodated at the bottom of each annular groove 111. The heating element 120 is connected to the inner wall of the annular groove 111 and contacts the welding layer 320, thereby directly heating the welding layer 320. Since multiple heating elements 120 have the same heating power, multiple welding layers 320 melt synchronously, ensuring welding efficiency. The number of heating elements 120 placed in the annular groove 111 can be adjusted according to actual conditions.
[0057] Based on the above, please refer to... Figures 1-3 In this embodiment, the heating roller 100 also includes multiple temperature sensors 130. Each temperature sensor 130 is connected to the inner wall of a cavity 112 to detect the temperature at different positions of the body 110. The temperature sensor 130 can transmit the detected temperature to an external receiver. Based on the detection signal received by the receiver, the operator can determine the heating efficiency of the heating element 120 on the welding layer 320 at different positions, and then adjust the heating efficiency of the heating element 120 to ensure temperature uniformity, so that multiple welding layers 320 melt synchronously to ensure welding efficiency.
[0058] Understandably, this embodiment includes a wire, one end of which extends into the body 110 and connects to the heating element 120 inside the accommodating cavity 112, while the other end is electrically connected to an external power source. Heating elements 120 located in different accommodating cavities 112 are electrically connected to an external power source via different wires. Operators can adjust the heating power of the heating element 120 by adjusting the current, thereby ensuring temperature uniformity.
[0059] Further, please refer to Figure 1 In this embodiment, the conveying assembly 210 includes a conveying platform 211 and a conveyor belt 212, which is movably coupled with the conveying platform 211; the conveyor belt 212 is used to convey the battery cells 330 along the conveying direction.
[0060] According to the above, in this embodiment, the battery cell welding equipment 200 further includes a driver 230; the frame 220 includes a transmission rod 221 and a support rod 222; the transmission rod 221 passes through the body 110, and the two ends of the transmission rod 221 are rotatably connected to the support rod 222 and the driver 230, respectively.
[0061] Specifically, the two ends of the transmission rod 221 are rotatably connected to the driver 230 and the support rod 222, respectively. The support rod 222 and the driver 230 are both connected to the conveying platform 211 to raise the heating roller 100. The driver 230 and the support rod 222 are located on both sides of the conveyor belt 212, so that the heating roller 100 is located above the battery cell 330, thereby allowing the molten welding layer 320 to adhere to the battery cell 330 under the action of gravity.
[0062] The driver 230 drives the transmission rod 221 to rotate, and the heating roller 100 rotates together with the transmission rod 221, thereby engaging with the battery cell 330 that moves along the conveying direction under the action of the conveyor belt 212, so as to weld the welding strip 310 and the battery cell 330 together.
[0063] In other embodiments, the battery cell 330 can be directly placed on the conveying platform 211. Two guide rails are provided on the conveying platform 211, located on both sides of the battery cell 330, and the two guide rails extend in parallel directions. The driver 230 and the support rod 222 are respectively movably engaged with the two guide rails, so that the driver 230 and the support rod 222 can drive the heating roller 100 to move along the extension direction of the guide rails, thereby enabling the heating roller 100 to movably engage with the battery cell 330 to weld the battery cell 330 and the welding strip 310 together.
[0064] In other embodiments, the driver 230 and support rod 222 may also be placed on the ground without being connected to the conveying platform 211, and the positional relationship between the frame 220 and the conveying assembly 210 may be adjusted according to the actual situation.
[0065] In summary, the body 110 of the heating roller 100 can be movably fitted with the battery cell 330, and the annular groove 111 contains a welding ribbon 310 and a welding layer 320. During the movable fitting of the body 110 and the battery cell 330, the heating element 120 heats the welding layer 320, causing it to melt upon heating and adhere to the battery cell 330 from the inner wall of the annular groove 111. During the movable fitting of the body 110 and the battery cell 330, the welding ribbon 310 moves from the annular groove 111 onto the battery cell 330 and is welded to the battery cell 330 by the welding layer 320 that has solidified on the surface of the battery cell 330. Because the welding layer 320 has a certain deformation space, it can act as a buffer, reducing the pressure transmitted to the battery cell 330, thereby preventing warping and cracking of the battery cell 330. This heating roller 100 can weld the welding ribbon 310 to the battery cell 330, and has a simple structure, high welding efficiency, and low maintenance cost.
[0066] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A heating roller, characterized in that: The heating roller (100) includes a body (110) and at least one heating element (120). The outer peripheral surface of the body (110) is provided with at least one annular groove (111) around its axial direction. The annular groove (111) is used to accommodate the welding strip (310) and the welding layer (320). The bottom of the annular groove (111) accommodates a heating element (120); or, the heating element (120) is disposed inside the body (110); In this process, along the radial direction of the heating roller (100), the welding strip (310) and the welding layer (320) located in the same annular groove (111) are stacked from the inside to the outside.
2. The heating roller according to claim 1, characterized in that: The number of the annular grooves (111) is multiple, and the multiple annular grooves (111) are arranged at intervals along the axial direction of the body (110); each annular groove (111) is used to accommodate the solder strip (310) and the welding layer (320).
3. The heating roller according to claim 1, characterized in that: The body (110) is provided with at least one receiving cavity (112), and the receiving cavity (112) accommodates a plurality of the heating elements (120).
4. The heating roller according to claim 3, characterized in that: The number of accommodating cavities (112) is multiple, and the multiple accommodating cavities (112) are spaced apart along the axial direction of the body (110). Each accommodating cavity (112) accommodates at least one of the heating elements (120).
5. The heating roller according to claim 3, characterized in that: The heating roller (100) also includes a temperature sensor (130), which is connected to the inner wall of the accommodating cavity (112).
6. The heating roller according to any one of claims 1-5, characterized in that: The depth of the annular groove (111) is less than the thickness of the welding strip (310).
7. The heating roller according to any one of claims 1-5, characterized in that: The melting point of the weld layer (320) is lower than that of the weld strip (310).
8. A battery cell welding device, characterized in that: The battery cell welding equipment (200) includes a conveying assembly (210), a frame (220), and a heating roller (100) according to any one of claims 1-7; the conveying assembly (210) is used to convey the battery cells (330) along the conveying direction; the body (110) is rotatably connected to the frame (220); The heating roller (100) is used to weld the welding layer (320) and the welding strip (310) stacked in the annular groove (111) to the battery cell (330).
9. The battery cell welding equipment according to claim 8, characterized in that: The battery cell welding equipment (200) also includes a driver (230); the frame (220) includes a transmission rod (221) and a support rod (222); the transmission rod (221) passes through the body (110), and the two ends of the transmission rod (221) are rotatably connected to the support rod (222) and the driver (230), respectively.
10. The battery cell welding equipment according to claim 8, characterized in that: The conveying assembly (210) includes a conveying platform (211) and a conveyor belt (212), the conveyor belt (212) being movably coupled to the conveying platform (211); the conveyor belt (212) is used to convey the battery cell (330) along the conveying direction.