Heterojunction cell screen printing turn-over mechanism

Abstract

The invention provides a heterojunction battery silk-screen printing turn-over mechanism, and relates to the technical field of auxiliary equipment for heterojunction battery production, the heterojunction battery silk-screen printing turn-over mechanism comprises a first conveying line, a turn-over assembly and a second conveying line which are sequentially arranged in the conveying direction, the first conveying line and the second conveying line are both used for conveying battery substrates, and the turn-over assembly is used for turning over the battery substrates; the turn-over assembly comprises a first turn-over main body, a second turn-over main body and a distance adjusting mechanism, the first turn-over main body and the second turn-over main body are arranged at intervals in the first direction, and at least part of the battery substrate can make contact with each of the first turn-over main body and the second turn-over main body; the distance adjusting mechanism is connected with the first turn-over body and the second turn-over body so as to adjust the distance between the first turn-over body and the second turn-over body in the first direction. The turnover requirements of battery substrate materials of various specifications can be met, abrasion to metal electrodes on the printed faces of the battery substrate materials can be effectively reduced, and the silk-screen printing efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary equipment for heterojunction battery production, and in particular to a screen printing flipping mechanism for heterojunction batteries. Background Art

[0002] Heterojunction cells are currently the most efficient crystalline silicon solar cells. They have the largest bifaciality among crystalline silicon solar cells, low temperature coefficient, and minimum power attenuation rate. They can be manufactured using thin silicon wafers less than 100μm, with low material cost and fewer production processes. In the production process of heterojunction cells, screen printing is an important process in the metallization of heterojunction cell electrodes. It requires printing cell grid lines, i.e. metal electrodes, on both sides of the cell substrate material. However, the device for assisting heterojunction cell flipping in the related technology has low applicability, and when flipping after one side of the cell substrate material has been printed, the flipping device is prone to wear the metal electrode on the printed side, resulting in low screen printing efficiency. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a screen printing flipping mechanism for heterojunction batteries, which can meet the flipping requirements of battery substrate materials of various specifications, and can effectively reduce the wear of metal electrodes on the printed surface of the battery substrate material, thereby ensuring screen printing efficiency.

[0005] A screen printing flipping mechanism for heterojunction batteries according to an embodiment of the present invention comprises a first conveying line, a flipping assembly and a second conveying line arranged in sequence along a conveying direction, wherein the first conveying line and the second conveying line are both used to convey battery substrates, and the flipping assembly is used to flip the battery substrates;

[0006] The flip assembly includes a first flip body, a second flip body and a spacing adjustment mechanism, wherein the first flip body and the second flip body are arranged at intervals along a first direction, the first direction is perpendicular to the conveying direction, and at least a portion of the battery substrate can contact each of the first flip body and the second flip body; the spacing adjustment mechanism is connected to the first flip body and the second flip body so as to adjust the spacing between the first flip body and the second flip body along the first direction.

[0007] According to the heterojunction battery screen printing flipping mechanism of the embodiment of the present invention, the first conveyor line, the flipping assembly and the second conveyor line cooperate to form an automatic flipping mechanism for the battery substrate in the screen printing process of the heterojunction battery, wherein the spacing adjustment mechanism can adjust the spacing between the first flipping body and the second flipping body, so that the flipping assembly can adapt to the flipping and receiving requirements of battery substrates of different specifications. At the same time, because the metal electrode on the printed surface of the battery substrate is suspended between the first flipping body and the second flipping body, it is not in contact with the first flipping body and the second flipping body and is not easily worn. Therefore, compared with the related art, the present invention can meet the flipping requirements of battery substrate materials of various specifications, and can effectively reduce the wear of the metal electrode on the printed surface of the battery substrate material, thereby ensuring the screen printing efficiency.

[0008] In some embodiments, the first flip body and the second flip body each include a support seat, a support shaft, a first motor and a plurality of flip blades.

[0009] Wherein, the support seat is connected to the spacing adjustment mechanism, the support shaft is pivotally connected to the support seat along the first direction, and the first motor is mounted on the support seat and is transmission-connected to the support shaft;

[0010] Among them, the multiple flip leaves are connected to the support shaft and are arranged at equal intervals along the circumference of the support shaft. A receiving groove is jointly defined between any two adjacent flip leaves and the outer peripheral wall of the support shaft, and at least a portion of the battery base is suitable for being slidably connected to the receiving groove.

[0011] In some embodiments, the first flip body and the second flip body further include a central tube, the central tube is connected to the support seat and inserted along the first direction at the portion of the support shaft away from the first motor, the central tube is suitable for being connected to an external vacuum pump, and a through groove communicating with the inner cavity of the central tube is provided on the peripheral wall surface of the central tube;

[0012] The flip leaf is provided with a first air cavity and has a first wall surface and a second wall surface opposite to each other along the thickness direction thereof, the first air cavity has a first position connected to the through groove and a second position separated from the through groove, at least one of the first wall surface and the second wall surface is provided with an air hole connecting the first air cavity and the outside, the battery substrate is adsorbed on the flip leaf at the first position and detached from the flip leaf at the second position.

[0013] In some embodiments, there are a plurality of the air holes, and the plurality of air hole arrays are arranged on any one of the first wall surface and the second wall surface of the flip leaf.

[0014] In some embodiments, the spacing adjustment mechanism includes a frame, a second motor and a screw. The frame is arranged between the first conveyor line and the second conveyor line. The second motor is mounted on the frame and is connected to the screw transmission. The screw extends along the first direction and is pivotally connected to the frame. The screw is threadedly engaged with the first flip body and the second flip body. The first flip body and the second flip body are movable relative to the frame.

[0015] In some embodiments, the heterojunction battery screen printing flipping mechanism further includes a first pushing assembly, which is connected to the first conveying line and is suitable for pushing the battery substrate toward the flipping assembly so that the battery substrate enters the flipping assembly.

[0016] In some embodiments, the heterojunction battery screen printing flipping mechanism also includes a second pushing assembly, there are two second pushing assemblies, one of the second pushing assemblies is connected to the first flipping body, and the other second pushing assembly is connected to the second flipping body, and the second pushing assembly is suitable for pushing the battery substrate toward the second conveying line so that the battery substrate enters the second conveying line.

[0017] In some embodiments, the first pusher assembly and the second pusher assembly both include a telescopic cylinder and a pusher rod.

[0018] Wherein, the cylinder body of the telescopic cylinder of the first pushing assembly is installed below the first conveying line, and the cylinder body of the telescopic cylinder of the second pushing assembly is installed on the flipping assembly;

[0019] Wherein, the piston rod of the telescopic cylinder is connected to the push rod to pull the push rod along the conveying direction, the push rod of the first push assembly can be telescoped in the height direction relative to the first conveying line, the height direction is perpendicular to the first direction and the conveying direction, and the push rod of the second push assembly can be telescoped in the first direction relative to the flip assembly;

[0020] The push rod has a first critical state and a second critical state, the length of the push rod in the first critical state is greater than the length in the second critical state, the push rod is spaced apart from the battery substrate in the second critical state, and at least a portion of the push rod abuts against an edge of the battery substrate in the first critical state so as to push the battery substrate along the conveying direction.

[0021] In some embodiments, the first pusher assembly further includes a mounting plate, and a pusher rod of the first pusher assembly is connected to the mounting plate. There are a plurality of pusher rods of the first pusher assembly and the pusher rods are arranged at intervals along the first direction.

[0022] In some embodiments, the push rod includes a connecting portion, an elastic portion and a push portion connected in sequence, a portion of the connecting portion away from the elastic portion is connected to the piston rod of the telescopic cylinder, and the elastic portion can press the push portion toward the first critical state;

[0023] The connecting part and the pushing part are both electrically connected to an external power supply, and a magnetic attraction force is generated between the connecting part and the pushing part when power is turned on. The length of the pushing rod when power is turned on is less than the length of the pushing rod when power is turned off.

[0024] In some embodiments, the first conveying line and the second conveying line each include a base, a first rotating shaft, a second rotating shaft, a third motor, a driving wheel, and a driven wheel.

[0025] Wherein, the first rotating shaft and the second rotating shaft are arranged on the base at intervals along the conveying direction and are both pivotally connected to the base, and the first rotating shaft and the second rotating shaft both extend along the first direction;

[0026] Wherein, the third motor is mounted on the base and is transmission-connected to the first rotating shaft, the driving wheel is sleeved on the first rotating shaft, the driven wheel is sleeved on the second rotating shaft, and the driving wheel and the driven wheel are transmission-connected via a transmission belt.

[0027] In some embodiments, there are multiple driving wheels and they are arranged at intervals along the first direction, there are multiple driven wheels and they correspond one-to-one to the driving wheels, a sliding channel is defined between any two adjacent transmission belts, and the pushing rod of the first pushing assembly can slide along the sliding channel in the first critical state.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the screen printing flipping mechanism of the heterojunction battery according to an embodiment of the present invention.

[0030] Figure 2 It is a schematic diagram of the connection structure between the turning assembly and the second pushing assembly in the screen printing turning mechanism for a heterojunction battery in an embodiment of the present invention.

[0031] Figure 3 It is a cross-sectional view of the connection structure among the support shaft, the turning blades and the central tube in the screen printing turning mechanism of the heterojunction battery according to an embodiment of the present invention.

[0032] Figure 4It is a schematic diagram of the connection structure between the first conveyor line and the first pushing assembly in the screen printing flipping mechanism of the heterojunction battery in an embodiment of the present invention.

[0033] Figure 5 yes Figure 4 Schematic diagram of the main structure.

[0034] Figure numerals: 1. first conveyor line, 11. base, 12. first rotating shaft, 13. second rotating shaft, 14. third motor, 15. driving wheel, 16. driven wheel, 17. transmission belt, 2. flipping assembly, 21. first flipping body, 22. second flipping body, 221. support seat, 222. support shaft, 223. first motor, 224. flipping blade, 2241. first air cavity, 2242. air hole, 225. center tube, 2251. through groove, 23. spacing adjustment mechanism, 231. frame, 232. second motor, 233. screw, 3. second conveyor line, 4. first pushing assembly, 41. telescopic cylinder, 42. pushing rod, 421. connecting part, 422. elastic part, 423. pushing part, 43. mounting plate, 5. second pushing assembly. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figure 1 and Figure 2 As shown, a screen-printed flipping mechanism for a heterojunction battery according to an embodiment of the present invention comprises a first conveying line 1, a flipping assembly 2 and a second conveying line 3 arranged in sequence along a conveying direction; the first conveying line 1 and the second conveying line 3 are both used for conveying battery substrates, and the flipping assembly 2 is used for flipping the battery substrates.

[0037] The flip assembly 2 includes a first flip body 21, a second flip body 22 and a spacing adjustment mechanism 23. The first flip body 21 and the second flip body 22 are arranged at intervals along a first direction, the first direction is perpendicular to the conveying direction, and at least a portion of the battery substrate can contact each of the first flip body 21 and the second flip body 22; the spacing adjustment mechanism 23 is connected to the first flip body 21 and the second flip body 22 so as to adjust the spacing between the first flip body 21 and the second flip body 22 along the first direction.

[0038] It can be understood that the screen-printing flipping mechanism for heterojunction batteries according to the embodiment of the present invention is formed by the cooperation of the first conveyor line 1, the flipping assembly 2 and the second conveyor line 3 to form an automatic flipping mechanism for the battery substrate in the screen-printing process of the heterojunction battery, wherein the spacing adjustment mechanism 23 can adjust the spacing between the first flipping body 21 and the second flipping body 22, so that the flipping assembly 2 can adapt to the flipping and receiving requirements of battery substrates of different specifications. At the same time, because the metal electrodes on the printed surface of the battery substrate are suspended between the first flipping body 21 and the second flipping body 22, they are not in contact with the first flipping body 21 and the second flipping body 22 and are not easily worn. Therefore, compared with the related art, the present invention can meet the flipping requirements of battery substrate materials of various specifications, and can effectively reduce the wear of the metal electrodes on the printed surface of the battery substrate material, thereby ensuring the screen printing efficiency.

[0039] Specifically, the conveying direction may be the front-to-back direction in the figure. The first conveying line 1 is located behind the flipping assembly 2, and the second conveying line 3 is located in front of the flipping assembly 2. The first direction may be the left-right direction in the figure.

[0040] It should be noted that at least part of the edge of the battery substrate (i.e., the portion where the metal electrodes are not printed) can be in contact with each of the first flip body 21 and the second flip body 22 to ensure that the first flip body 21 and the second flip body 22 support the battery substrate, so that the metal electrodes on the printed surface of the battery substrate are suspended between the first flip body 21 and the second flip body 22.

[0041] like Figure 2 As shown, in some embodiments, the first flip body 21 and the second flip body 22 each include a support seat 221 , a support shaft 222 , a first motor 223 and a plurality of flip blades 224 .

[0042] The support base 221 is connected to the spacing adjustment mechanism 23 , the support shaft 222 is pivotally connected to the support base 221 along a first direction, and the first motor 223 is mounted on the support base 221 and is transmission-connected to the support shaft 222 .

[0043] Among them, multiple flip leaves 224 are connected to the support shaft 222 and are arranged at equal intervals along the circumference of the support shaft 222. Any two adjacent flip leaves 224 and the outer peripheral wall of the support shaft 222 jointly define a receiving groove, and at least a portion of the battery base is suitable for being slidably connected to the receiving groove.

[0044] It can be understood that the first motor 223 can drive the multiple flipping blades 224 to rotate on the support seat 221 through the support shaft 222, so that the battery base received from the first conveyor line 1 can be flipped 180 degrees when entering the second conveyor line 3, and the multiple flipping blades 224 also ensure the continuity of the entire flipping operation. At the same time, the accommodating groove can limit the battery base along the thickness direction of the flipping blade 224 during the flipping process, ensuring the smooth implementation of the flipping operation.

[0045] It should be noted that the flip blades 224 of the first flip body 21 and the flip blades 224 of the second flip body 22 correspond one to one along the first direction (i.e., the left-right direction). At the same time, the first motor 223 of the first flip body 21 and the first motor 223 of the second flip body 22 must ensure synchronous rotation to ensure that both can well receive and flip the battery base.

[0046] like Figure 2 and Figure 3 As shown, in some embodiments, the first flip body 21 and the second flip body 22 further include a central tube 225, which is connected to the support seat 221 and inserted in the first direction at the portion of the support shaft 222 away from the first motor 223 to ensure that the flip blade 224 rotates stably on the support seat 221. The central tube 225 is suitable for being connected to an external vacuum pump, and a through groove 2251 communicating with the inner cavity of the central tube 225 is provided on the peripheral wall surface of the central tube 225.

[0047] The flip leaf 224 is provided with a first air cavity 2241 and has a first wall and a second wall opposite to each other along its thickness direction, the first air cavity 2241 has a first position connected to the through groove 2251 and a second position separated from the through groove 2251, at least one of the first wall and the second wall is provided with an air hole 2242 connecting the first air cavity 2241 and the outside, the battery substrate is adsorbed on the flip leaf 224 at the first position and detached from the flip leaf 224 at the second position.

[0048] It can be understood that an external vacuum pump is used to evacuate air through the central tube 225 to form an adsorption force at the air hole 2242 of the flip leaf 224 under the action of the internal and external pressure difference, so that when the first air cavity 2241 of the flip leaf 224 is connected with the through groove 2251, the battery substrate can be adsorbed on the flip leaf 224 to ensure reliable flipping of the battery substrate, and when the first air cavity 2241 of the flip leaf 224 is separated from the through groove 2251, the battery substrate can be detached from the flip leaf 224 to achieve smooth unloading of the battery substrate.

[0049] Specifically, the support seat 221 may be a U-shaped structure. The plurality of flip blades 224 may rotate around the central tube 225 on the support seat 221. The central tube 225 and the support shaft 222 may both extend along the first direction and be coaxial.

[0050] like Figure 2 and Figure 3 As shown, in some embodiments, there are a plurality of air holes 2242 , and the plurality of air holes 2242 are arranged in an array on any one of the first wall surface and the second wall surface of the flip leaf 224 to ensure reliable adsorption of the battery substrate on the flip leaf 224 .

[0051] like Figure 2 As shown, in some embodiments, the spacing adjustment mechanism 23 includes a frame 231, a second motor 232 and a screw 233. The frame 231 is arranged between the first conveyor line 1 and the second conveyor line 3. The second motor 232 is installed on the frame 231 and is transmission-connected to the screw 233. The screw 233 extends along a first direction and is pivotally connected to the frame 231. The screw 233 is threadedly matched with the first flip body 21 and the second flip body 22. The first flip body 21 and the second flip body 22 are movable relative to the frame 231.

[0052] It can be understood that the second motor 232 can automatically drive the first flip body 21 and the second flip body 22 to move toward each other along the first direction through the screw 233 to change the distance between them to match the receiving and flipping requirements of battery bases of different specifications. The overall structure is simple and practical.

[0053] Specifically, the lead screw 233 is provided with a first external thread and a second external thread in opposite directions along the first direction. The support seat 221 of the first flip body 21 is threadedly matched with the first external thread, and the support seat 221 of the second flip body 22 is threadedly matched with the second external thread, so that the two can move toward each other on the frame 231. In order to ensure that the first flip body 21 and the second flip body 22 slide smoothly along the first direction, a guide rod can be arranged beside the lead screw 233 along the conveying direction (i.e., the front-to-back direction), or a slide groove can be opened on the frame 231, wherein the guide rod and the slide groove extend along the first direction.

[0054] like Figure 1 As shown, in some embodiments, the heterojunction battery screen printing flipping mechanism also includes a first pushing assembly 4, which is connected to the first conveyor line 1 and is suitable for pushing the battery substrate toward the flipping assembly 2 so that the battery substrate enters the flipping assembly 2.

[0055] like Figure 1 and Figure 2 As shown, in some embodiments, the screen printing flipping mechanism for heterojunction batteries also includes a second pushing assembly 5, and there are two second pushing assemblies 5, one of which is connected to the first flipping body 21, and the other second pushing assembly 5 is connected to the second flipping body 22. The second pushing assembly 5 is suitable for pushing the battery substrate toward the second conveying line 3 so that the battery substrate enters the second conveying line 3.

[0056] It can be understood that the first pushing assembly 4 and the second pushing assembly 5 push the battery substrate up and down in the flip assembly 2 to improve the screen printing efficiency. At the same time, when the battery substrate is small in size and cannot smoothly enter or exit the flip assembly 2, the first pushing assembly 4 and the second pushing assembly 5 assist the movement of the battery substrate to ensure the continuity of the entire flipping operation.

[0057] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the first pushing assembly 4 and the second pushing assembly 5 both include a telescopic cylinder 41 and a pushing rod 42 .

[0058] Among them, the cylinder body of the telescopic cylinder 41 of the first pushing assembly 4 is installed below the first conveyor line 1, and the cylinder body of the telescopic cylinder 41 of the second pushing assembly 5 is installed on the flipping assembly 2 (that is, the support seat 221 of any one of the first flipping body 21 and the second flipping body 22).

[0059] Among them, the piston rod of the telescopic cylinder 41 is connected to the pushing rod 42 to pull the pushing rod 42 along the conveying direction. The pushing rod 42 of the first pushing assembly 4 can be extended and retracted in the height direction relative to the first conveying line 1, and the height direction is perpendicular to the first direction and the conveying direction. The pushing rod 42 of the second pushing assembly 5 can be extended and retracted in the first direction relative to the flipping assembly 2 (that is, the flipping leaf 224 of either the first flipping body 21 or the second flipping body 22).

[0060] The push rod 42 has a first critical state and a second critical state. The length of the push rod 42 in the first critical state is greater than the length in the second critical state. The push rod 42 is spaced apart from the battery substrate in the second critical state. At least a portion of the push rod 42 abuts against the edge of the battery substrate in the first critical state so as to push the battery substrate along the conveying direction.

[0061] It can be understood that the telescopic cylinder 41 can push the push rod 42 to move along the conveying direction, so that when the push rod 42 is in the first critical state, the push rod 42 can push the battery substrate to move, and when the push rod 42 is in the second critical state, the battery substrate on the first conveyor line 1 can be normally conveyed, and the battery substrate on the flip assembly 2 can rotate smoothly with the flip blade 224.

[0062] Specifically, the telescopic cylinder 41 may not be limited to one of an electric cylinder, a pneumatic cylinder, a hydraulic cylinder and an oil cylinder. The height direction may be the up and down direction in the figure. When the push rod 42 in the first push assembly 4 is in the second critical state, the push rod 42 is located below the battery substrate on the first conveyor line 1; when the push rod 42 in the first push assembly 4 is in the first critical state, at least part of the top of the push rod 42 abuts against the rear end edge of the battery substrate on the first conveyor line 1. Similarly, when the push rod 42 in the second push assembly 5 is in the second critical state, the push rod 42 is in a normal rotation position that does not affect the turning leaf 224; when the push rod 42 in the second push assembly 5 is in the first critical state, the push rod 42 is in a position that can contact and push the battery substrate.

[0063] like Figure 5 As shown, in some embodiments, the first pushing assembly 4 also includes a mounting plate 43, and a pushing rod 42 of the first pushing assembly 4 is connected to the mounting plate 43. There are multiple pushing rods 42 of the first pushing assembly 4 and they are arranged at intervals along the first direction, so that the first pushing assembly 4 can push battery substrates of different specifications.

[0064] like Figure 5 As shown, in some embodiments, the pushing rod 42 includes a connecting portion 421, an elastic portion 422 and a pushing portion 423 which are connected in sequence, the part of the connecting portion 421 away from the elastic portion 422 is connected to the piston rod of the telescopic cylinder 41, and the elastic portion 422 can press the pushing portion 423 toward the first critical state.

[0065] The connecting portion 421 and the pushing portion 423 are both electrically connected to an external power source. A magnetic attraction force is generated between the connecting portion 421 and the pushing portion 423 when power is supplied. The length of the pushing rod 42 when power is supplied is shorter than the length of the pushing rod 42 when power is off.

[0066] It can be understood that the connection portion 421 and the pusher portion 423 are designed to generate magnetic attraction when energized, which further improves the automation performance of the flipping mechanism, ensures the work efficiency of the entire flipping operation, and simplifies the overall structure of the pusher rod 42.

[0067] Specifically, the elastic part 422 can be a spring. There is no magnetic attraction between the connecting part 421 and the pushing part 423 when the power is off. When the pushing rod 42 of the first pushing assembly 4 is powered on, the sum of the magnetic attraction between the connecting part 421 and the pushing part 423 and the gravity of the pushing part 423 is greater than the elastic force of the elastic part 422; when the power is off, the elastic force of the elastic part 422 is greater than the gravity of the pushing part 423. Similarly, when the pushing rod 42 of the second pushing assembly 5 is powered on, the magnetic attraction between the connecting part 421 and the pushing part 423 is greater than the elastic force of the elastic part 422; when the power is off, the elastic force of the elastic part 422 will push the pushing part 423 to reset.

[0068] like Figure 4 and Figure 5 As shown, in some embodiments, the first conveyor line 1 and the second conveyor line 3 each include a base 11 , a first rotating shaft 12 , a second rotating shaft 13 , a third motor 14 , a driving wheel 15 and a driven wheel 16 .

[0069] The first rotating shaft 12 and the second rotating shaft 13 are arranged on the base 11 at intervals along the conveying direction and are both pivotally connected to the base 11 . The first rotating shaft 12 and the second rotating shaft 13 both extend along the first direction.

[0070] The third motor 14 is mounted on the base 11 and is connected to the first shaft 12 . The driving wheel 15 is sleeved on the first shaft 12 . The driven wheel 16 is sleeved on the second shaft 13 . The driving wheel 15 and the driven wheel 16 are connected to each other through a transmission belt 17 .

[0071] like Figure 4 and Figure 5 As shown, in some embodiments, there are multiple driving wheels 15 and they are arranged at intervals along the first direction, there are multiple driven wheels 16 and they correspond one-to-one to the driving wheels 15, and a sliding channel is defined between any two adjacent transmission belts 17. The pushing rod 42 of the first pushing assembly 4 can slide along the sliding channel when in the first critical state.

[0072] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] In addition, 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics 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, without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A screen printing flipping mechanism for heterojunction batteries, characterized in that: It comprises a first conveying line, a flipping assembly and a second conveying line which are sequentially arranged along a conveying direction, wherein the first conveying line and the second conveying line are both used for conveying battery substrates, and the flipping assembly is used for flipping the battery substrates; The turning assembly comprises: a first flip body and a second flip body, wherein the first flip body and the second flip body are arranged at intervals along a first direction, the first direction is perpendicular to the conveying direction, and at least a portion of the battery substrate can contact each of the first flip body and the second flip body; and A spacing adjustment mechanism is connected to the first flip body and the second flip body so as to adjust the spacing between the first flip body and the second flip body along the first direction.

2. The screen printing flipping mechanism for heterojunction batteries according to claim 1, characterized in that: The first flip body and the second flip body both include: A support base, a support shaft and a first motor, wherein the support base is connected to the spacing adjustment mechanism, the support shaft is pivotally connected to the support base along the first direction, and the first motor is mounted on the support base and drivingly connected to the support shaft; and A plurality of flip leaves are connected to the support shaft and are arranged at equal intervals along the circumference of the support shaft, and a receiving groove is jointly defined between any two adjacent flip leaves and the outer peripheral wall of the support shaft, and at least a portion of the battery base is suitable for being slidably connected to the receiving groove.

3. The screen printing flipping mechanism for heterojunction batteries according to claim 2, characterized in that: The first flip body and the second flip body further include a central tube, the central tube being connected to the support seat and inserted along the first direction at a portion of the support shaft away from the first motor, the central tube being suitable for being connected to an external vacuum pump, and a through groove communicating with an inner cavity of the central tube being provided on a peripheral wall surface of the central tube; The flip leaf is provided with a first air cavity and has a first wall surface and a second wall surface opposite to each other along the thickness direction thereof, the first air cavity has a first position connected to the through groove and a second position separated from the through groove, at least one of the first wall surface and the second wall surface is provided with an air hole connecting the first air cavity and the outside, the battery substrate is adsorbed on the flip leaf at the first position and detached from the flip leaf at the second position.

4. The screen printing flipping mechanism for heterojunction batteries according to claim 3, characterized in that: There are a plurality of air holes, and the plurality of air hole arrays are arranged on any one of the first wall surface and the second wall surface of the flip leaf.

5. The screen printing flipping mechanism for heterojunction batteries according to any one of claims 1 to 4, characterized in that: The spacing adjustment mechanism includes a frame, a second motor and a screw. The frame is arranged between the first conveying line and the second conveying line. The second motor is installed on the frame and is connected to the screw transmission. The screw extends along the first direction and is pivotally connected to the frame. The screw is threadedly engaged with the first flip body and the second flip body. The first flip body and the second flip body are movable relative to the frame.

6. The screen printing flipping mechanism for heterojunction batteries according to claim 1, characterized in that: The invention also includes a first pushing assembly, which is connected to the first conveying line and is suitable for pushing the battery substrate toward the turning assembly so that the battery substrate enters the turning assembly.

7. The screen printing flipping mechanism for heterojunction batteries according to claim 6, characterized in that: It also includes a second pushing assembly, there are two second pushing assemblies, one of which is connected to the first flip body, and the other is connected to the second flip body, and the second pushing assembly is suitable for pushing the battery substrate toward the second conveying line so that the battery substrate enters the second conveying line.

8. The screen printing flipping mechanism for heterojunction batteries according to claim 7, characterized in that: The first pusher assembly and the second pusher assembly both include: A telescopic cylinder, wherein the cylinder body of the telescopic cylinder of the first pushing assembly is installed below the first conveying line, and the cylinder body of the telescopic cylinder of the second pushing assembly is installed on the flipping assembly; and A push rod, the piston rod of the telescopic cylinder is connected to the push rod to pull the push rod along the conveying direction, the push rod of the first push assembly can be telescoped in the height direction relative to the first conveying line, the height direction is perpendicular to the first direction and the conveying direction, and the push rod of the second push assembly can be telescoped in the first direction relative to the flip assembly; The push rod has a first critical state and a second critical state, the length of the push rod in the first critical state is greater than the length in the second critical state, the push rod is spaced apart from the battery substrate in the second critical state, and at least a portion of the push rod abuts against an edge of the battery substrate in the first critical state so as to push the battery substrate along the conveying direction.

9. The screen printing flipping mechanism for heterojunction batteries according to claim 8, characterized in that: The first pusher assembly further includes a mounting plate, and a pusher rod of the first pusher assembly is connected to the mounting plate. There are a plurality of pusher rods of the first pusher assembly and the pusher rods are arranged at intervals along the first direction.

10. The screen printing flipping mechanism for heterojunction batteries according to claim 8 or 9, characterized in that: The push rod comprises a connecting portion, an elastic portion and a push portion which are connected in sequence, a portion of the connecting portion which is away from the elastic portion is connected to the piston rod of the telescopic cylinder, and the elastic portion can press the push portion toward the first critical state; The connecting part and the pushing part are both electrically connected to an external power supply, and a magnetic attraction force is generated between the connecting part and the pushing part when power is turned on. The length of the pushing rod when power is turned on is less than the length of the pushing rod when power is turned off.

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