Battery piece printing system

Abstract

The utility model discloses a battery piece printing system which comprises a transmission device, at least one laser emitting unit, a plurality of masks, a driving device, a position sensor and a PLC control unit, the laser emitting unit comprises a laser emitter and a light splitting assembly, the laser emitter is suitable for emitting laser, and the light splitting assembly is suitable for splitting light emitted by the laser emitter. The light splitting assembly comprises a first transmission glass plate and a first holophote, an included angle exists between the first transmission glass plate and the laser direction, laser can penetrate through the first transmission glass plate, first reflected light and first refracted light are obtained, and the first holophote is suitable for converting the first reflected light into second reflected light through mirror reflection. The first refracted light is perpendicular to the transmission direction of the battery pieces and faces the printing areas, and the second reflected light and the first refracted light are parallel and correspond to the two adjacent printing areas in a one-to-one mode. Therefore, according to the battery piece printing system, printing of a plurality of battery pieces can be completed at the same time through one-time light emitting, and therefore the printing efficiency of the battery piece printing system is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery sheet printing system. Background Art

[0002] When preparing copper grid lines on solar cells, the current practice is to first selectively expose the copper seed layer on the surface of the silicon wafer, then remove the exposed copper seed layer after development to expose the copper film on the surface of the silicon wafer, and then perform electroplating to grow a layer of copper grid lines on the exposed copper film.

[0003] The current printing method is that the feeding suction cup places the battery cell on the mobile platform. After the platform moves to the printing position, the printing laser head emits light to expose the battery cell on the platform. After the exposure is completed, the mobile platform moves to the discharge position, and the discharge suction cup takes out the battery cell and places it on the discharge track. At this point, the printing process of a battery cell is completed, and it goes back and forth. The main disadvantage of the existing printing method is that the printing platform can only hold one battery cell, and the platform can only complete the exposure of one battery cell after completing one reciprocating motion. In addition, the printing platform also takes time to reciprocate, which makes the printing efficiency very low.

[0004] Therefore, the printing system needs to be further improved to improve the printing efficiency of the battery cells. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a battery cell printing system, which can print multiple battery cells at the same time, thereby greatly improving the printing efficiency of the battery cell printing system.

[0006] In one aspect of the present invention, the present invention provides a battery cell printing system. According to an embodiment of the present invention, the battery cell printing system includes:

[0007] A transmission device, the transmission device is suitable for transmitting the battery cell and is provided with a plurality of battery cell printing areas, the plurality of printing areas are distributed at intervals along the transmission direction of the battery cell;

[0008] At least one laser emitting unit, the laser emitting unit comprising a laser emitter and a spectroscopic component, the laser emitter is suitable for emitting laser light, the spectroscopic component comprises a first transmissive glass plate and a first total reflection mirror, the first transmissive glass plate has an angle with the laser direction and is suitable for the laser to pass through and obtain a first reflected light and a first refracted light, the angle is less than 90 degrees, the first total reflection mirror is suitable for converting the first reflected light into a second reflected light by specular reflection, the first refracted light is perpendicular to the transmission direction of the cell and faces the printing area, the second reflected light is parallel to the first refracted light and both correspond to two adjacent printing areas one by one;

[0009] A plurality of mask plates, wherein the mask plates are located between the light splitting component and the printing area and are arranged in a one-to-one correspondence with the printing area;

[0010] A driving device, the driving device is connected to the plurality of mask plates and is suitable for independently controlling the vertical distance between each mask plate and the solar cell;

[0011] a position sensor, the position sensor being adapted to identify whether the battery sheet is transferred to the printing area;

[0012] A PLC control unit is connected to the driving device, the laser emitter and the position sensor, and is suitable for controlling, according to the identification signal of the position sensor and the refraction energy and reflection energy of the first transmissive glass plate: the opening and closing of the laser emitter and the start and stop of the driving device, and whether to adjust the vertical distance between each mask and the battery cell through the driving device.

[0013] Therefore, the battery printing system provided by the utility model can make the laser emitted by the laser emitter firstly form the first refracted light and the first reflected light through the reflection and refraction of the first transmission glass plate by arranging the light splitting component in the laser emission unit, and then the first reflected light changes its transmission direction through the reflection of the first total reflection mirror to form the second reflected light which is parallel to the first refracted light and has the same transmission direction, and finally make two parallel laser beams with the same transmission direction, namely the first refracted light and the second reflected light, be emitted toward the printing area corresponding to each of them at the same time, and irradiate the battery cells which are pre-transmitted to each printing area after passing through each mask plate placed corresponding to each printing area, thus, by adopting the battery cell printing system of the utility model, the laser emitted by the laser emitter can be finally divided into two laser beams with the same transmission direction by the light splitting component during the printing process, and according to the energy difference of the first refracted light and the second reflected light, the vertical distance between each mask plate and the battery cell is adjusted by using the driving device, so that the energy of the first refracted light and the second reflected light reaching the battery cell is the same, and at the same time, with the transmission device, the position sensor and the PLC control unit and other structural parts, the printing of multiple battery cells can be completed at the same time by emitting light once, thereby greatly improving the printing efficiency of the battery cell printing system.

[0014] In addition, the battery printing system according to the above embodiment of the utility model may also have the following additional technical features:

[0015] According to an embodiment of the utility model, the cell printing system includes a plurality of laser emitting units, and the plurality of laser emitting units are spaced apart along the transmission direction of the cell. Thus, the plurality of laser emitters in the plurality of laser emitting units can simultaneously print more cells by emitting light at the same time, further improving the printing efficiency of the cell printing system.

[0016] According to an embodiment of the utility model, a first shading plate is provided between the first transmission glass plate and the first total reflection mirror, thereby preventing the first refracted light and the second reflected light from interfering with each other, thereby improving the printing quality of the battery printing system.

[0017] According to an embodiment of the utility model, in at least one of the laser emission units, the light splitting component further includes: a second transmission glass plate and a second total reflection mirror. In the transmission direction of the cell sheet, the second transmission glass plate and the first transmission glass plate have the same specifications and are arranged in mirror symmetry. The second total reflection mirror and the first total reflection mirror have the same specifications and are arranged in mirror symmetry. The second transmission glass plate is suitable for the laser to pass through and obtain the third reflected light and the second refracted light. The second total reflection mirror is suitable for converting the third reflected light into the fourth reflected light by mirror reflection. The fourth reflected light and the second refracted light correspond to the two adjacent printing areas one by one. In this way, the printing efficiency of the cell sheet printing system can be further improved.

[0018] According to an embodiment of the utility model, a second shading plate is provided between the first transmissive glass plate and the second transmissive glass plate, and the second shading plate separates the laser into two parallel sub-beams, thereby further improving the printing efficiency of the cell printing system.

[0019] According to an embodiment of the utility model, a third light shielding plate is provided between the second transmission glass plate and the second total reflection mirror, thereby improving the printing quality of the battery printing system.

[0020] According to an embodiment of the utility model, the first light-transmitting glass plate is arranged in parallel with the first total reflection mirror, thereby making it possible to keep the transmission directions of the first refracted light and the second reflected light parallel, thereby improving the printing quality of the battery printing system.

[0021] According to an embodiment of the utility model, the driving device is a driving motor, thereby making it possible to conveniently adjust the vertical distance between the mask and the cell.

[0022] According to an embodiment of the utility model, the transmission device is a belt conveyor, thereby, multiple battery cells can be more conveniently transmitted to the battery cell printing area at the same time, thereby further improving the printing efficiency of the battery cell printing system.

[0023] According to an embodiment of the present invention, the adjustable threshold of the vertical distance between the mask and the cell is 1 mm.

[0024] According to an embodiment of the utility model, the PLC control unit is adapted to control the driving device to increase the vertical distance between the mask and the cell corresponding to the first refracted light, or to reduce the vertical distance between the mask and the cell corresponding to the second reflected light when the refraction energy of the first transmissive glass plate is greater than its reflection energy. This is conducive to achieving the same printing effect for cells located in different printing areas, thereby improving the printing quality of the cell printing system.

[0025] According to an embodiment of the utility model, the printing area corresponding to each laser emitting unit is provided with at least one position sensor, and the PLC control unit is adapted to simultaneously control the opening and closing of the laser emitters in the plurality of laser emitting units based on the identification signals fed back by the plurality of position sensors, or to independently control the opening and closing of the laser emitters in each laser emitting unit. Thus, the use flexibility of the printing system can be improved, thereby improving the printing efficiency of the cell printing system.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 It is a structural schematic diagram of a battery sheet printing system in one embodiment of the utility model;

[0029] Figure 2 is a schematic diagram of an angle α between the laser direction and the first transmissive glass plate in another embodiment of the utility model;

[0030] Figure 3 is a schematic diagram of a vertical distance d between a mask and a cell in another embodiment of the utility model;

[0031] Figure 4 It is a structural schematic diagram of a battery cell printing system in another embodiment of the utility model;

[0032] Figure 5 It is a structural schematic diagram of a battery cell printing system in another embodiment of the utility model.

[0033] Description of Figure Numbers:

[0034] 100: transmission device; 110: battery cell printing area; 200: laser emitting unit; 210: laser emitter; 220: spectrometer; 221: first transmission glass plate; 222: first total reflection mirror; 223: second transmission glass plate; 224: second total reflection mirror; 300: mask; 400: battery cell; 510: first shading plate; 520: second shading plate; 530: third shading plate; 10: laser; 11: first reflected light; 12: second reflected light; 13: third reflected light; 14: fourth reflected light; 21: first refracted light; 22: second refracted light. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In one aspect of the present invention, the present invention provides a battery sheet printing system. According to an embodiment of the present invention, referring to Figure 1 , Figure 2 and Figure 3 The cell printing system includes: a transmission device 100, at least one laser emitting unit 200, a plurality of mask plates 300, a driving device (not shown in the figure), a position sensor (not shown in the figure) and a PLC (programmable logic controller) control unit (not shown in the figure). The transmission device 100 is suitable for transmitting a cell 400 and is provided with a plurality of cell printing areas 110. The plurality of printing areas 110 are arranged along the transmission direction of the cell 400 (such as Figure 1 The laser emitting unit 200 includes a laser emitter 210 and a light splitting component 220. The laser emitter 210 is suitable for emitting laser 10. The light splitting component 220 includes a first transmissive glass plate 221 and a first total reflection mirror 222. The first transmissive glass plate 221 is spaced apart from the laser 10 in the direction (such as Figure 1 and 2 BB' direction) has an angle α (such as Figure 2 As shown) and suitable for the laser 10 to pass through and obtain the first reflected light 11 and the first refracted light 21, the angle α is less than 90 degrees, the first total reflection mirror 222 is suitable for converting the first reflected light 11 into the second reflected light 12 by mirror reflection, and the transmission direction of the first refracted light 21 and the battery cell 400 (as shown) Figure 1 The second reflected light 12 and the first refracted light 21 are parallel and correspond to two adjacent printing areas 110; the mask 300 is located between the light splitting component 220 and the printing area 110, and is arranged in a one-to-one correspondence with the printing area 110; the driving device is connected to the plurality of mask plates 300, and is suitable for independently controlling the vertical distance d (such as the vertical distance d between each mask plate 300 and the solar cell 400) Figure 3 The position sensor is suitable for identifying whether the battery cell 400 is transmitted to the printing area 110; the PLC control unit is connected to the driving device, the laser emitter 210 and the position sensor, and is suitable for controlling, according to the identification signal of the position sensor and the refraction energy and reflection energy of the first transmission glass plate 221, the opening and closing of the laser emitter 210 and the start and stop of the driving device, and whether to adjust the vertical distance d between each mask 300 and the battery cell 400 through the driving device.

[0037] Specifically, the principle that the battery cell printing system of the utility model can improve the efficiency of battery cell printing is: Figure 1 In the printing process, after the laser emitter 210 emits the laser 10, the laser 10 is first irradiated on the first transmission glass plate 221, and a part of the laser is reflected and emitted to form the first reflected light 11 and irradiates the first total reflection mirror 222 arranged on the optical path of the first reflected light 11, and then is totally reflected to form the second reflected light 12, and then the second reflected light 12 is emitted toward one of the printing areas 110 corresponding to the second reflected light 12 on the transmission device 100, and the second reflected light 12 passes through the mask 300 corresponding to the printing area 110 and irradiates the first reflected light 110 transmitted to the transmission device 100 in advance. The printing of one cell is completed on the cell 400 in the printing area 110. At the same time, after the laser 10 is irradiated on the first transmissive glass plate 221, another part of the laser light passes through the first transmissive glass plate 221 and is refracted and then emitted to form a first refracted light 21. Then, the first refracted light 21 is emitted toward one of the printing areas 110 corresponding to the first refracted light 21 on the transmission device 100. The first refracted light 21 passes through the mask plate 300 corresponding to the printing area 110 and irradiates the cell 400 transmitted to the printing area 110 in advance, thereby completing the printing of another cell. Among them, when the magnitude relationship between the refraction energy and the reflection energy generated after the laser 10 is irradiated on the first transmissive glass plate 221 is known, the vertical distance d between the mask 300 and the cell 400 corresponding to the first refracted light 21 and the second reflected light 12 can be adjusted in advance, so that the energy of the two is consistent when they reach the cell 400; when the magnitude relationship between the refraction energy and the reflection energy generated after the laser 10 is irradiated on the first transmissive glass plate 221 is unknown, at least one printing can be performed in advance, and the magnitude relationship between the refraction energy and the reflection energy generated after the laser 10 is irradiated on the first transmissive glass plate 221 is obtained based on the printing line width corresponding to the first refracted light 21 and the second reflected light 12 after printing, and on this basis, the vertical distance d between the mask 300 and the cell 400 corresponding to the first refracted light 21 and the second reflected light 12 is adjusted, so that the energy of the two is consistent when they reach the cell 400. In this way, batch printing of multiple cells can be completed at the same time.

[0038] Therefore, by adopting the battery cell printing system of the utility model, during the printing process, the laser emitted by the laser transmitter can be finally divided into two laser beams with the same transmission direction, namely the first refracted light and the second reflected light, by the beam splitting component, and according to the energy difference between the first refracted light and the second reflected light, the vertical distance between each mask and the battery cell is adjusted by the driving device, so that the energy of the first refracted light and the second reflected light are the same, and at the same time, with the cooperation of structural parts such as the transmission device, the position sensor and the PLC control unit, the printing of multiple battery cells can be completed simultaneously by emitting light once, thereby greatly improving the printing efficiency of the battery cell printing system.

[0039] The following will take the case of only one laser emitting unit 200 as an example to specifically introduce the process of printing a battery cell by the battery cell printing system of the present invention:

[0040] First, refer to Figure 1 , Figure 2 and Figure 3 It is understood that a plurality of battery cells 400 are placed on the transmission device 100, and the transmission device 100 transmits the battery cells 400 to a plurality of battery cell printing areas 110 set on the transmission device 100. At this time, after the position sensor recognizes that the battery cell 400 is located in the printing area 110, it transmits a signal to the PLC control unit, and the PLC control unit sends an opening command to the laser emitter 210 connected thereto, and the laser emitter 210 then emits the laser 10;

[0041] Then, the laser 10 is refracted and reflected by the first transmissive glass plate 221 to form a first refracted light 21 and a first reflected light 11. The first reflected light 11 is then totally reflected by the first total reflection mirror 222 to form a second reflected light 12 in the same transmission direction as the first refracted light 21. It should be noted here that in order to enable the laser 10 to form the first refracted light 21 and the first reflected light 11 after being irradiated on the first transmissive glass plate 221, it is necessary to set the angle α between the first transmissive glass plate 221 and the incident direction of the laser 10 within the range of 0-90 degrees. In addition, in some embodiments of the present invention, the first transmissive glass plate 221 and the first total reflection mirror 222 can be arranged in parallel, so that the propagation directions of the first refracted light 21 and the second reflected light 12 can be kept parallel. At this time, it is only necessary to adjust the direction of the laser 10 emitted by the laser emitter 210 (such as Figure 1 BB' direction) and the transmission direction of the battery cell 400 (such as Figure 1 The AA' direction) is in a vertical state, that is, the irradiation direction of the first refracted light 21 and the second reflected light 12 are both perpendicular to the transmission direction of the battery cell 400, thereby facilitating that all battery cells that need to be printed can achieve better printing quality;

[0042] Finally, the first refracted light 21 and the second reflected light 12 are simultaneously emitted toward the corresponding printing areas 110, and after passing through the respective masks 300 corresponding to the respective printing areas 110, they are irradiated on the battery cells 400 pre-transmitted to the respective printing areas 110 to complete the exposure. After the exposure is completed, the transmission device 100 is used to sequentially transmit the exposed battery cells, and the printing process of a group of battery cells is completed, and this is repeated. In some embodiments of the utility model, the transmission device 100 can intermittently and continuously transport the battery cells according to the printing cycle. In this way, the transmission device 100 and the laser emitting unit 200 can cooperate with each other during the printing process, making the operation of the battery cell printing system easier and more efficient.

[0043] During the printing process, the energy of the first reflected light 11 and the first refracted light 21 formed after the laser 10 emitted by the laser emitter 210 irradiates the first transmissive glass plate 221 can be the same, or the energy difference δ can be controlled within a range of less than 5% (wherein, E1 is the energy of the first refracted light, and E2 is the energy of the first reflected light), which is beneficial for achieving the same printing effect for each cell, and can save the operation of adjusting the vertical distance between the mask and the cell, or reduce the adjustment range of the adjustment operation and the possible trial and error cost.

[0044] As an example, the first transmissive glass plate can be a conventional product purchased from the market, or can be obtained by selecting ordinary glass and sputtering and coating its surface using conventional methods. By sputtering and coating the glass surface, it can also be achieved that the energy of the first reflected light and the first refracted light formed after the laser is irradiated on the first transmissive glass plate is the same, or the energy difference δ is less than 5%.

[0045] When the energy between the first refracted light 21 and the first reflected light 11 is different, the printing system provided by the utility model can use the driving device to adjust the vertical distance d between the mask 300 and the cell 400 according to the energy difference between the first refracted light 21 and the second reflected light 12 finally irradiated on the cell, so as to perform printing compensation, so that the two cells corresponding to the first refracted light 21 and the second reflected light 12 can achieve the same printing effect. For example, when the refraction energy of the first transmission glass plate 221 is greater than its reflection energy, that is, the energy of the first refracted light 21 is greater than the energy of the second reflected light 12. When the amount of light is measured, the PLC control unit can be used to control the driving device to drive the mask corresponding to the first refracted light 21 to move in the direction away from the cell, that is, to increase the vertical distance d between the corresponding mask and the cell, or to drive the mask corresponding to the second reflected light 12 to move in the direction close to the cell, that is, to reduce the vertical distance d between the corresponding mask and the cell. Therefore, when the energy between the first refracted light 21 and the first reflected light 11 is different, the vertical distance between the mask and the cell can be adjusted by the driving device, so that the cells located in different printing areas can achieve the same printing effect. It should be noted that there is no special requirement for the specific type of the driving device, as long as it can realize the driving of the mask to move in the direction close to or away from the cell. For example, the driving device can be a driving motor, and the use of the driving motor can easily realize the adjustment of the mask position, thereby making the operation of the printing system easier.

[0046] In the actual printing process, when the energy between the first refracted light 21 and the first reflected light 11 is different, the vertical distance d between the mask and the cell can be pre-adjusted using the experimental cell. Specifically, the operation can be performed as follows: first, two experimental cells are used to print according to the process of printing the cell described above, and after printing, the two experimental cells are developed to obtain corresponding printed lines on the experimental cell, and then the position of the mask corresponding to the experimental cell is adjusted according to the line width on the two experimental cells, and after adjustment, two new experimental cells are used to print again until the line widths obtained on the two experimental cells are consistent, at which time the position of the mask is the best position, and then the cells can be batch printed.

[0047] In some embodiments of the utility model, the adjustable threshold of the vertical distance between the mask and the cell can be 1mm. Slightly adjusting the vertical distance of the mask under the above threshold is conducive to improving the accuracy of the printing system, reducing the trial and error cost during the adjustment process, and making the operation of the cell printing system easier. It should be noted that when the energy difference δ between the first refracted light and the first reflected light is within the aforementioned range of less than 5%, the adjustable threshold of the above mask can meet the adjustment requirements of the mask, that is, by adjusting under the above adjustable threshold, the effect of making the first refracted light 21 and the second reflected light 12 reach the cell with the same energy can be achieved, thereby achieving the same printing effect for cells located in different printing areas.

[0048] In some embodiments of the present invention, a first shading plate 510 may be provided between the first transmission glass plate 221 and the first total reflection mirror 222. This can prevent the first refracted light 21 and the second reflected light 12 from interfering with each other, thereby improving the printing quality of the battery printing system.

[0049] In some embodiments of the utility model, the transmission device 100 can be a belt conveyor. Using a belt conveyor and setting multiple printing stations can more conveniently and simultaneously transmit multiple battery cells to the battery cell printing area, so as to achieve the purpose of printing multiple battery cells at the same time, thereby further improving the printing efficiency of the battery cell printing system.

[0050] In some embodiments of the present invention, the cell printing system may include multiple laser emitting units, and the multiple laser emitting units are spaced apart along the transmission direction of the cell. Thus, multiple laser emitters in the multiple laser emitting units can simultaneously print more cells by emitting light at the same time, further improving the printing efficiency of the cell printing system. For example, Figure 4In the printing system shown, two laser emitting units are provided, and correspondingly four printing stations are provided on the transmission device, so that four cells can be printed simultaneously. In actual production, those skilled in the art can flexibly set multiple laser emitting units according to actual space conditions and actual production needs, such as setting three, four or more laser emitting units, which can greatly improve the printing efficiency of the cell printing system.

[0051] Furthermore, in some embodiments of the utility model, when the cell printing system includes multiple laser emitting units, at least one position sensor may be provided in the printing area corresponding to each laser emitting unit, and the PLC control unit is suitable for simultaneously controlling the opening and closing of the laser emitters in the multiple laser emitting units based on the identification signals fed back by the multiple position sensors, or independently controlling the opening and closing of the laser emitters in each laser emitting unit. In other words, multiple groups of laser emitting units can emit light at the same time or independently, so that the cell printing system can flexibly control the light emission of the laser emitting units according to the actual printing needs, thereby improving the use flexibility of the printing system, and further improving the printing efficiency of the cell printing system.

[0052] In other embodiments of the present invention, referring to Figure 5 In at least one laser emitting unit 200 in the cell printing system, the light splitting component 220 may further include: a second transmission glass plate 223 and a second total reflection mirror 224. Figure 5In the AA' direction), the second transmissive glass plate 223 and the first transmissive glass plate 221 have the same specifications and are arranged in a mirror-symmetrical manner, the second total reflection mirror 224 and the first total reflection mirror 222 have the same specifications and are arranged in a mirror-symmetrical manner, the second transmissive glass plate 223 is suitable for laser transmission and obtaining the third reflected light 13 and the second refracted light 22, the second total reflection mirror 224 is suitable for converting the third reflected light 13 into the fourth reflected light 14 through mirror reflection, and the fourth reflected light 14 and the second refracted light 22 correspond one-to-one to two adjacent printing areas 110. During the printing process, the laser 10 emitted by the laser emitter 210 is first divided into two parts of laser light with substantially the same energy, and then passes through the first transmission glass plate 221 and the second transmission glass plate 223 respectively to form the first refracted light 21, the first reflected light 11, the second refracted light 22 and the third reflected light 13, and then the first reflected light 11 passes through the first total reflection mirror 222 to form the second reflected light 12, and the third reflected light 13 passes through the second total reflection mirror 224 to form the fourth reflected light 14, the first refracted light 21, the second refracted light 22, the second reflected light 12 and the fourth reflected light 14 are parallel to each other and have the same transmission direction, and are finally emitted toward the corresponding printing area 110, and are irradiated on the battery cell 400 that has been pre-transmitted to the printing area through the mask plate 300 that corresponds one-to-one to the printing area 110 to complete the printing. Therefore, by adopting the above-mentioned cell printing system, during the printing process, the laser emitted by the laser transmitter can be finally divided into four laser beams with the same transmission direction through the first transmission glass plate, the first total reflection mirror, the second transmission glass plate and the second total reflection mirror arranged in the light splitting component, and according to the energy difference between the first refracted light, the second reflected light, the second refracted light and the fourth reflected light, the vertical distance between each corresponding mask and the cell is adjusted by the driving device, so that the energy of the first refracted light, the second reflected light, the second refracted light and the fourth reflected light reaching the cell is the same, and at the same time, with the cooperation of the transmission device, the position sensor and the PLC control unit and other structural parts, the printing of 4 cells can be completed at the same time through one light emission of a laser emitting unit including the second transmission glass plate and the second total reflection mirror in the printing system, thereby further improving the printing efficiency of the cell printing system.

[0053] It should be noted here that the second transmissive glass plate 223 and the first transmissive glass plate 221 have the same specifications, and the second total reflection mirror 224 and the first total reflection mirror 222 have the same specifications, which means that they are the same in terms of material, thickness, refractive index, absorbance, etc., that is, the optical paths of the two refracted light beams and the two reflected light beams formed after the laser is incident on the first transmissive glass plate 221 and the second transmissive glass plate 223 with the same energy and the same angle are respectively mirror-symmetrical, and the two refracted light beams and the two reflected light beams are respectively the same in energy, and the optical paths of the two reflected light beams formed after the laser is incident on the first total reflection mirror 222 and the second total reflection mirror 224 with the same energy and the same angle are mirror-symmetrical, and the energy of the two reflected light beams is the same.

[0054] In some embodiments of the utility model, a second shading plate 520 may be provided between the first transmission glass plate 221 and the second transmission glass plate 223, and the second shading plate 520 separates the laser light emitted by the laser emitter into two parallel sub-beams. Thus, the laser light emitted by the laser emitter can be simply separated into two sub-beams with substantially the same energy, and then the two sub-beams pass through the first transmission glass plate 221, the second transmission glass plate 223, the first total reflection mirror 222 and the second total reflection mirror 224 respectively, and then irradiate on the cell to complete printing. In this way, by providing the second shading plate 520, the laser light emitted by the laser emitter can be simply and evenly separated, and mutual interference between the two separated sub-beams and between the first refracted light 21 and the second refracted light 22 can be prevented, thereby further improving the printing quality and printing efficiency of the cell printing system.

[0055] In some embodiments of the present invention, a third shading plate 530 may be provided between the second transmission glass plate 223 and the second total reflection mirror 224. This can prevent the second refracted light 22 and the fourth reflected light 14 from interfering with each other, thereby improving the printing quality of the battery printing system.

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery cell printing system, characterized in that: include: A transmission device, the transmission device is suitable for transmitting the battery cell and is provided with a plurality of battery cell printing areas, the plurality of printing areas are distributed at intervals along the transmission direction of the battery cell; At least one laser emitting unit, the laser emitting unit comprising a laser emitter and a spectroscopic component, the laser emitter is suitable for emitting laser light, the spectroscopic component comprises a first transmissive glass plate and a first total reflection mirror, the first transmissive glass plate has an angle with the laser direction and is suitable for the laser to pass through and obtain a first reflected light and a first refracted light, the angle is less than 90 degrees, the first total reflection mirror is suitable for converting the first reflected light into a second reflected light by specular reflection, the first refracted light is perpendicular to the transmission direction of the cell and faces the printing area, the second reflected light is parallel to the first refracted light and both correspond to two adjacent printing areas one by one; A plurality of mask plates, wherein the mask plates are located between the light splitting component and the printing area and are arranged in a one-to-one correspondence with the printing area; A driving device, the driving device is connected to the plurality of mask plates and is suitable for independently controlling the vertical distance between each mask plate and the solar cell; a position sensor, the position sensor being adapted to identify whether the battery sheet is transferred to the printing area; A PLC control unit is connected to the driving device, the laser emitter and the position sensor, and is suitable for controlling, according to the identification signal of the position sensor and the refraction energy and reflection energy of the first transmissive glass plate: the opening and closing of the laser emitter and the start and stop of the driving device, and whether to adjust the vertical distance between each mask and the battery cell through the driving device.

2. The cell sheet printing system according to claim 1, characterized in that: comprising a plurality of the laser emitting units, wherein the plurality of the laser emitting units are distributed at intervals along the transmission direction of the battery sheet; and / or, A first shading plate is provided between the first transmission glass plate and the first total reflection mirror.

3. The battery sheet printing system according to claim 1 or 2, characterized in that: In at least one of the laser emitting units, the light splitting component further includes: a second transmissive glass plate and a second total reflection mirror. In the transmission direction of the cell sheet, the second transmissive glass plate and the first transmissive glass plate have the same specifications and are arranged in a mirror-symmetrical manner. The second total reflection mirror and the first total reflection mirror have the same specifications and are arranged in a mirror-symmetrical manner. The second transmissive glass plate is suitable for the laser to pass through and obtain a third reflected light and a second refracted light. The second total reflection mirror is suitable for converting the third reflected light into a fourth reflected light through mirror reflection. The fourth reflected light and the second refracted light correspond one-to-one to two adjacent printing areas.

4. The cell sheet printing system according to claim 3, characterized in that: A second shading plate is provided between the first transmissive glass plate and the second transmissive glass plate, and the second shading plate separates the laser into two parallel sub-beams; and / or, A third shading plate is provided between the second transmission glass plate and the second total reflection mirror.

5. The cell sheet printing system according to claim 1 or 4, characterized in that: The first transmission glass plate is arranged parallel to the first total reflection mirror.

6. The cell sheet printing system according to claim 1 or 4, characterized in that: The driving device is a driving motor.

7. The battery sheet printing system according to claim 1 or 4, characterized in that: The transmission device is a belt conveyor.

8. The cell sheet printing system according to claim 1 or 4, characterized in that: The adjustable threshold of the vertical distance between the mask and the cell is 1 mm.

9. The cell sheet printing system according to claim 1 or 4, characterized in that: The PLC control unit is suitable for controlling the driving device to increase the vertical distance between the mask and the battery cell corresponding to the first refracted light, or to reduce the vertical distance between the mask and the battery cell corresponding to the second reflected light when the refraction energy of the first transmissive glass plate is greater than its reflection energy.

10. The cell sheet printing system according to claim 1 or 4, characterized in that: The printing area corresponding to each of the laser emitting units is provided with at least one of the position sensors, and the PLC control unit is suitable for simultaneously controlling the opening and closing of the laser emitters in the multiple laser emitting units based on the identification signals fed back by the multiple position sensors, or for independently controlling the opening and closing of the laser emitters in each of the laser emitting units.

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