Heating structure for electromagnetic induction heating of battery piece silver grid and battery piece transmission equipment

Abstract

The utility model relates to the technical field of solar photovoltaic power generation, in particular to a heating structure for electromagnetic induction heating of a battery piece silver grid and battery piece transmission equipment, which comprises a battery piece, transmission equipment, an electromagnetic induction coil, a conductive layer and an insulating layer, and is characterized in that the transmission equipment is positioned below the battery piece and is used for transmitting the battery piece; the electromagnetic induction coil is arranged above or below the transmission equipment and is used for generating a changing magnetic field above or below the transmission equipment, the conductive layer covers a surface silver gate area of the battery piece and forms an electromagnetic induction loop with the electromagnetic induction coil, and the insulating layer is arranged between the conductive layer and the battery piece and is used for preventing current from directly flowing through the battery piece. Therefore, the technical problems that when an existing heating structure is used for heating, a silicon wafer of the battery piece is integrally heated, energy is wasted, degradation of a high-temperature intolerant battery layer material is easily caused, the performance of the battery is reduced, and the service life of the battery is prolonged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar photovoltaic power generation, in particular to a heating structure of a silver grid of an electromagnetic induction heating cell and a cell transmission device. Background Art

[0002] During the manufacturing process of solar cells, the silver grid on the cell of the solar cell is a key part for current collection, and its performance directly affects the efficiency of the cell. During the processing of existing cells, the silver grid on the cell usually needs to be heated and dried. However, the traditional heating structure is relatively complex, the drying time is long, and the energy consumption is also high.

[0003] The prior art CN213322249U discloses a surface drying device for the grid lines of solar cells after silver paste printing. The drying device occupies a small area and can reduce the length and width of the printing process production line. More equipment can be placed in the same factory building, thereby improving the utilization rate of the factory building. At the same time, the equipment structure is simple, the drying time is shorter, and the maintenance cost can be greatly reduced. The upper, middle and lower temperature zones are set according to the characteristics of rising hot air and the temperature curve of the surface drying process from low to high and then back to low. The temperature control is more accurate and reasonable, and the energy consumption is relatively reduced.

[0004] However, when the above-mentioned drying equipment heats and dries the silver grid on the battery cell, it often causes the entire silicon wafer to be heated, which not only wastes energy but also easily causes degradation of the high-temperature intolerant battery layer materials, thereby reducing battery performance and life. Utility Model Content

[0005] The purpose of the utility model is to provide a heating structure for electromagnetic induction heating of the silver grid of a battery cell and a battery cell transmission device, aiming to solve the technical problem that the existing drying equipment often causes the entire silicon wafer to be heated when heating and drying the silver grid on the battery cell, which not only wastes energy but also easily causes the degradation of the high-temperature-intolerant battery layer material, thereby reducing the battery performance and life.

[0006] To achieve the above-mentioned objectives, in a first aspect, the utility model provides a heating structure for the silver grid of an electromagnetic induction heating battery cell, comprising a battery cell, a transmission device, an electromagnetic induction coil, a conductive layer and an insulating layer. The transmission device is located below the battery cell and is used to transmit the battery cell. The electromagnetic induction coil is arranged above or below the transmission device and is used to generate a changing magnetic field above or below the transmission device. The conductive layer covers the silver grid area on the surface of the battery cell and forms an electromagnetic induction loop with the electromagnetic induction coil. The insulating layer is arranged between the conductive layer and the battery cell to prevent current from flowing directly through the battery cell to ensure that heating only acts on the silver grid area of ​​the battery cell.

[0007] Wherein, the conductive layer is a transparent conductive film or other conductive material having good electrical contact with the silver grid of the cell.

[0008] In the second aspect, the utility model also provides a battery cell transmission device, including a conveyor belt, a positioning device and a driving mechanism, wherein the conveyor belt is used to carry and transmit the battery cell to ensure that the battery cell moves stably during the heating process, the positioning device is arranged on the conveyor belt, and is used to accurately position the battery cell to ensure that the silver grid area of ​​the battery cell is aligned with the electromagnetic induction coil, and the driving mechanism is used to drive the conveyor belt and the positioning device to move, thereby realizing continuous transmission and precise positioning of the battery cell.

[0009] Among them, the driving mechanism includes a driving member, a support frame and a steering wheel. The driving member drives the steering wheel to rotate between the support frames. There are two support frames, which are respectively arranged on the left and right sides of the ground. Multiple steering wheels are evenly distributed between the two support frames, and the transmission belt is arranged outside all the steering wheels.

[0010] In which, the driving member includes a control motor, a first gear and a second gear. The control motor is arranged outside the support frame. The number of the first gear and the second gear is consistent with the number of the steering wheels, and the positions correspond one to one. The first gear is evenly arranged outside the output shaft of the control motor. The second gear is engaged with the first gear and is arranged on the side of the steering wheel close to the first gear.

[0011] The utility model provides a heating structure for electromagnetic induction heating of the silver grid of a battery cell and a battery cell transmission device. The battery cell is transmitted by the transmission device, and a changing magnetic field is generated above or below the transmission device by the electromagnetic induction coil. When the battery cell is transmitted above or below the electromagnetic induction coil, the conductive layer forms an electromagnetic induction loop with the electromagnetic induction coil to heat the silver grid on the battery cell. During the heating process, the insulating layer can prevent current from flowing directly through the battery cell to ensure that heating only acts on the silver grid area of ​​the battery cell. This solves the technical problem that when the existing heating structure heats the battery cell, the silicon wafer of the battery cell will be heated as a whole, which not only wastes energy but also easily causes degradation of the high-temperature-intolerant battery layer material, thereby reducing battery performance and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0013] Figure 1It is a structural diagram of the heating structure of the silver grid of the electromagnetic induction heating battery cell according to the first embodiment of the present utility model.

[0014] Figure 2 It is a schematic diagram of the overall structure of the battery cell transmission device of the second embodiment of the present utility model.

[0015] Figure 3 It is a cross-sectional schematic diagram along the steering wheel of the battery cell transmission device of the second embodiment of the present utility model.

[0016] In the figure: 101 - battery cell, 102 - electromagnetic induction coil, 103 - conductive layer, 104 - insulating layer, 105 - transmission belt, 106 - positioning device, 107 - support frame, 108 - steering wheel, 109 - control motor, 110 - first gear, 111 - second gear. DETAILED DESCRIPTION

[0017] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] First embodiment

[0019] See also Figure 1 , Figure 1 It is a structural diagram of the heating structure of the silver grid of the electromagnetic induction heating battery cell according to the first embodiment of the present utility model.

[0020] The present invention provides a heating structure for electromagnetic induction heating of a silver grid on a cell, comprising a cell 101, a transmission device, an electromagnetic induction coil 102, a conductive layer 103, and an insulating layer 104. This solution solves the problem that, when conventional drying equipment heats and dries the silver grid on the cell 101, the entire silicon wafer is often heated, which not only wastes energy but also easily causes degradation of high-temperature-intolerant cell layer materials, thereby reducing cell performance and lifespan. It is understood that the solution can be used in the heating and drying of the silver grid on the cell 101 during the solar cell manufacturing process.

[0021] In this embodiment, the battery cell 101 is transmitted by the transmission device, and a changing magnetic field is generated above or below the transmission device by the electromagnetic induction coil 102. When the battery cell 101 is transmitted above or below the electromagnetic induction coil 102, the conductive layer 103 forms an electromagnetic induction loop with the electromagnetic induction coil 102 to heat the silver grid on the battery cell 101. During the heating process, the insulating layer 104 can prevent current from flowing directly through the battery cell 101 to ensure that heating only acts on the silver grid area of ​​the battery cell 101. This solves the technical problem that when the existing heating structure heats the battery cell 101, the silicon wafer of the battery cell 101 will be heated as a whole, which not only wastes energy but also easily causes degradation of the high-temperature-intolerant battery layer material, thereby reducing battery performance and life.

[0022] In which, the transmission device is located below the battery cell 101 and is used to transmit the battery cell 101. The electromagnetic induction coil 102 is arranged above or below the transmission device and is used to generate a changing magnetic field above or below the transmission device. The conductive layer 103 covers the silver grid area on the surface of the battery cell 101 and forms an electromagnetic induction loop with the electromagnetic induction coil 102. The insulating layer 104 is arranged between the conductive layer 103 and the battery cell 101 to prevent current from flowing directly through the battery cell 101, so as to ensure that heating only acts on the silver grid area of ​​the battery cell 101.

[0023] Secondly, the conductive layer 103 is a transparent conductive film or other conductive material that has good electrical contact with the silver grid of the cell 101 .

[0024] When using the present invention, the battery cell 101 is transmitted by the transmission device, and a changing magnetic field is generated above or below the transmission device by the electromagnetic induction coil 102. When the battery cell 101 is transmitted above or below the electromagnetic induction coil 102, the conductive layer 103 forms an electromagnetic induction loop with the electromagnetic induction coil 102 to heat the silver grid on the battery cell 101. During the heating process, the insulating layer 104 can prevent current from flowing directly through the battery cell 101 to ensure that heating only acts on the silver grid area of ​​the battery cell 101, thereby solving the technical problem that when the existing heating structure heats the battery cell 101, the silicon wafer of the battery cell 101 will be heated as a whole, which not only wastes energy but also easily causes degradation of the high-temperature-intolerant battery layer material, thereby reducing battery performance and life.

[0025] Second embodiment

[0026] See also Figures 2 and 3 , Figure 2This is a schematic diagram of the overall structure of the battery cell transmission device according to the second embodiment of the present invention. Figure 3 It is a cross-sectional schematic diagram of the battery cell transmission device along the steering wheel 108 of the second embodiment of the present invention. On the basis of the first embodiment, the present invention also provides a battery cell transmission device, including a transmission belt 105, a positioning device 106 and a driving mechanism, the driving mechanism includes a driving member, a support frame 107 and a steering wheel 108, and the driving member includes a control motor 109, a first gear 110 and a second gear 111.

[0027] The conveyor belt 105 is used to carry and transport the battery cell 101 to ensure that the battery cell 101 moves stably during the heating process. The positioning device 106 is set on the conveyor belt 105 and is used to accurately position the battery cell 101 to ensure that the silver grid area of ​​the battery cell 101 is aligned with the electromagnetic induction coil 102. The driving mechanism is used to drive the conveyor belt 105 and the positioning device 106 to move, thereby realizing continuous transmission and precise positioning of the battery cell 101.

[0028] The driving member drives the steering wheel 108 to rotate between the support frames 107. There are two support frames 107, which are respectively arranged on the left and right sides of the ground. A plurality of steering wheels 108 are evenly distributed between the two support frames 107. The transmission belt 105 is mounted outside all the steering wheels 108. Each steering wheel 108 can rotate along its own axis between the two support frames 107, thereby driving all the transmission belts 105 outside the steering wheels 108 to move from front to back or from back to front.

[0029] The control motor 109 is arranged outside the support frame 107, the number of the first gear 110 and the second gear 111 is consistent with the number of the steering wheels 108, and the positions correspond one to one. The first gear 110 is evenly arranged outside the output shaft of the control motor 109, and the second gear 111 is engaged with the first gear 110 and is arranged on the side of the steering wheel 108 close to the first gear 110. When the control motor 109 is started, the power output by the output shaft of the control motor 109 drives the first gear 110 to rotate along its own axis, thereby driving the second gear 111 engaged with the first gear 110 to rotate along its own axis, and then driving the steering wheel 108 to rotate along its own axis between the two support frames 107.

[0030] The battery sheet 101 is placed on the conveyor belt 105, and the control motor 109 is started, so that the power output by the output shaft of the control motor 109 drives the first gear 110 to rotate along its own axis, thereby driving the second gear 111 meshed with the first gear 110 to rotate along its own axis, and then driving the steering wheel 108 to rotate along its own axis between the two support frames 107. The rotation of the steering wheel 108 along its own axis between the two support frames 107 can drive the conveyor belt 105 to rotate between the two support frames 107. The support frames 107 are moved from front to back or from back to front, so that the battery cell 101 on the conveyor belt 105 can be transported from front to back or from back to front. During the transport process, the positioning device 106 can accurately locate the position of the battery cell 101 to ensure that the silver grid area of ​​the battery cell 101 is aligned with the electromagnetic induction coil 102. After the silver grid area of ​​the battery cell 101 is aligned with the electromagnetic induction coil 102, the conductive layer 103 forms an electromagnetic induction loop with the electromagnetic induction coil 102 to heat the silver grid on the battery cell 101.

[0031] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the utility model.

Claims

1. A heating structure for an electromagnetic induction heating cell silver grid, comprising a cell, characterized in that: It also includes a transmission device, an electromagnetic induction coil, a conductive layer and an insulating layer. The transmission device is located below the battery cell and is used to transmit the battery cell. The electromagnetic induction coil is arranged above or below the transmission device and is used to generate a changing magnetic field above or below the transmission device. The conductive layer covers the silver grid area on the surface of the battery cell and forms an electromagnetic induction loop with the electromagnetic induction coil. The insulating layer is arranged between the conductive layer and the battery cell to prevent current from flowing directly through the battery cell to ensure that heating only acts on the silver grid area of ​​the battery cell.

2. The heating structure of the silver grid of the electromagnetic induction heating cell according to claim 1, characterized in that: The conductive layer is a transparent conductive film or other conductive material that has good electrical contact with the silver grid of the cell.

3. A cell transmission device, applied to the heating structure of the electromagnetic induction heating cell silver grid according to claim 1 or claim 2, characterized in that: It includes a conveyor belt, a positioning device and a driving mechanism. The conveyor belt is used to carry and transport the battery cell to ensure that the battery cell moves stably during the heating process. The positioning device is set on the conveyor belt and is used to accurately position the battery cell to ensure that the silver grid area of ​​the battery cell is aligned with the electromagnetic induction coil. The driving mechanism is used to drive the conveyor belt and the positioning device to move, thereby realizing continuous transmission and precise positioning of the battery cell.

4. The cell transport device according to claim 3, wherein: The driving mechanism includes a driving member, a support frame and a steering wheel. The driving member drives the steering wheel to rotate between the support frames. There are two support frames, which are respectively arranged on the left and right sides of the ground. A plurality of steering wheels are evenly distributed between the two support frames, and the transmission belt is arranged outside all the steering wheels.

5. The cell transport device according to claim 4, wherein: The driving member includes a control motor, a first gear and a second gear. The control motor is arranged outside the support frame. The number of the first gear and the second gear is consistent with the number of the steering wheels, and the positions correspond one to one. The first gear is evenly arranged outside the output shaft of the control motor. The second gear is engaged with the first gear and is arranged on the side of the steering wheel close to the first gear.

Images