Dispensing device

Abstract

The utility model discloses a glue dispensing device which comprises a glue storage box body, wherein a glue outlet is formed in the bottom of the glue storage box body; a control valve is arranged on a glue outlet of the glue storage box body and is used for controlling the glue outlet to be opened and closed; the plurality of dispensing pens are arranged below the glue storage box body; the glue dispensing pen comprises a columnar barrel used for storing glue and a glue dispensing head connected with the bottom end of the columnar barrel. A glue inlet communicated with the glue outlet is formed in the top end of the cylindrical barrel; a dispensing opening is formed in the bottom end of the dispensing head; the supporting framework is used for bearing the dispensing pens, and the dispensing pens are arranged along a straight line at equal intervals; one end of the bypass air pipe is in air communication with the top end section of the columnar barrel, the other end of the bypass air pipe is communicated with an air pump, and the bypass air pipe is used for exhausting air in the columnar pipe to stop glue discharging of the glue dispensing opening and inflating air into the columnar pipe at a constant speed to enable glue discharging of the glue dispensing opening to be uniform. According to the dispensing device, the problem of cell piece cracking can be avoided, uniform and accurate dispensing of the main-grid-free cell piece is achieved, and stable connection between the welding strip and the cell piece can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of solar cell manufacturing, in particular to a glue dispensing device. Background Art

[0002] Busbarless cells are a type of photovoltaic cell with advantages such as no front-side busbars, no silver paste, high appearance, and high power. They can reduce optical losses on the front of the cell and increase short-circuit current. Busbarless cells are connected to each other via solder ribbons to form a string; however, the weld between the solder ribbons and the thin busbars on the cell is not stable and requires further adhesive reinforcement.

[0003] Currently, glue dispensing on the front and back sides of busbarless cells is typically done using screen printing. This involves placing the busbarless cell, already soldered to the ribbon, beneath a screen. Liquid glue is applied to the screen, and then a scraper is used to squeeze the glue through the mesh of the screen, allowing it to drip down onto the cell where the ribbon is soldered. However, in practice, improperly controlling the distance between the scraper and the cell can easily lead to hidden cracks in the cell. Furthermore, screen printing can easily result in uneven glue application. Utility Model Content

[0004] The purpose of the utility model is to provide a dispensing device that can avoid the problem of battery cell cracking and improve the accuracy and uniformity of dispensing.

[0005] In order to solve the above technical problems, the present invention provides a dispensing device, comprising:

[0006] A glue storage box is provided with a glue outlet at the bottom; a control valve is provided on the glue outlet of the glue storage box to control the opening and closing of the glue outlet;

[0007] A plurality of glue dispensing pens are provided below the glue storage box; wherein the glue dispensing pens include a cylindrical barrel for storing glue and a glue dispensing head connected to the bottom end of the cylindrical barrel; a glue inlet connected to the glue outlet is provided at the top end of the cylindrical barrel; and a glue dispensing port is provided at the bottom end of the glue dispensing head;

[0008] A support structure for carrying the dispensing pens, wherein the dispensing pens are arranged at equal intervals along a straight line;

[0009] A bypass air pipe, one end of which is in air communication with the top section of the cylindrical tube and the other end of which is in air communication with the air pump, is used to evacuate air from the cylindrical tube to stop the dispensing port from discharging glue, and to inflate air into the cylindrical tube at a uniform speed to ensure that the dispensing port discharges glue evenly.

[0010] In an optional embodiment of the present application, the support structure includes a horizontal track and a driving device connected to the horizontal track;

[0011] The dispensing pens are arranged in sequence on the horizontal track along the length direction of the horizontal track;

[0012] The driving device is used to drive the horizontal track to drive each of the dispensing pens to move synchronously along the length direction of the horizontal track.

[0013] In an optional embodiment of the present application, the support structure includes a lifting assembly connected to the horizontal track, which is used to drive the horizontal track to drive each of the dispensing pens to move up and down in the vertical direction.

[0014] In an optional embodiment of the present application, the lifting assembly includes a vertical telescopic guide rail having one end connected to the glue storage box and the other end connected to the end of the horizontal track; and a lifting motor for driving the vertical telescopic guide rail to telescope in the vertical direction.

[0015] In an optional embodiment of the present application, a laser ranging device is also provided on the horizontal track.

[0016] In an optional embodiment of the present application, the glue inlet of the glue dispensing pen is connected to the glue outlet of the glue storage box through an elastic hose.

[0017] In an optional embodiment of the present application, the support structure further includes a plurality of identical telescopic springs and a telescopic motor;

[0018] Wherein, any two adjacent dispensing pens are connected by the telescopic spring;

[0019] The telescopic motor is arranged at the end of the first end of the horizontal track and is connected to the glue dispensing pen closest to the first end of the horizontal track through the telescopic spring;

[0020] The glue dispensing pen closest to the second end of the horizontal track is connected to the end of the second end of the horizontal track through the telescopic spring.

[0021] In an optional embodiment of the present application, the dispensing port is a rectangular port with a length dimension of 0.12 mm to 0.3 mm and a width dimension of 0.1 mm to 0.3 mm;

[0022] The length direction of the rectangular opening is parallel to the straight line direction in which the glue pens are arranged in sequence, and the width direction of the rectangular opening is perpendicular to the straight line direction in which the glue pens are arranged in sequence.

[0023] In an optional embodiment of the present application, a constant temperature device is further included in the cylindrical tube that wraps each of the dispensing pens.

[0024] In an optional embodiment of the present application, a heat-insulating layer is provided on the outer surface of the glue storage box.

[0025] The utility model provides a glue dispensing device, comprising a glue storage box with a glue outlet at the bottom; a control valve is provided on the glue outlet of the glue storage box for controlling the opening and closing of the glue outlet; a plurality of glue dispensing pens are located below the glue storage box; wherein the glue dispensing pens comprise a cylindrical tube for storing glue and a glue dispensing head connected to the bottom end of the cylindrical tube; a glue inlet connected to the glue outlet is provided at the top end of the cylindrical tube; a glue dispensing port is provided at the bottom end of the glue dispensing head; a supporting structure for carrying each glue dispensing pens, and each glue dispensing pens are arranged at equal intervals along a straight line; a bypass air pipe having one end connected to the top section of the cylindrical tube and the other end connected to the air pump, for evacuating air from the cylindrical tube to stop the glue dispensing port from discharging glue, and for inflating air into the cylindrical tube at a uniform speed to make the glue dispensing port discharge glue evenly.

[0026] The glue dispensing device of the present application uses a glue dispensing pen to perform glue dispensing reinforcement on the position where the soldering strip is welded on the main grid-free battery, without the need for a scraper to scrape the glue, thereby effectively avoiding the problem of cracks in the main grid-free battery. On this basis, the present application further provides a bypass air pipe on the cylindrical tube of the glue dispensing pen, and the bypass air pipe is connected to an air pump, so that the bypass air pipe and the air pump can be used to control the air pressure in the glue dispensing pen; by controlling the glue dispensing pen to be in a negative pressure state, the glue in the glue dispensing pen cannot flow out of the glue dispensing port, thereby stopping the glue dispensing, and the glue dispensing pen can be inflated at a uniform speed by the air pump, thereby ensuring the uniform glue dispensing at the glue outlet, that is, ensuring the uniformity of glue dispensing on the main grid-free battery. It can be seen from this that the glue dispensing device in the present application will not cause crack damage to the main grid-free battery cell, and can also achieve uniform glue dispensing on the main grid-free battery cell, which is conducive to ensuring a stable connection between the soldering strip and the battery cell, thereby improving the yield rate of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the structure of the dispensing device provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the arrangement of cells in a single photovoltaic module after being welded together;

[0030] In the accompanying drawings: 1 is a glue storage box, 11 is a glue outlet, 2 is a glue dispensing pen, 21 is a cylindrical tube, 211 is a glue inlet, 22 is a glue dispensing head, 221 is a glue dispensing port, 3 is a bypass air pipe, 4 is an air pump, 51 is a horizontal track, 52 is a driving device, 53 is a vertical telescopic guide rail, 54 is a lifting motor, 55 is a telescopic spring, 56 is a telescopic motor, 6 is an elastic hose, 100 is a battery cell, and 101 is a welding strip. DETAILED DESCRIPTION

[0031] When traditionally using screen printing to dispense glue at the locations where solder ribbons are welded on busbar-less cells, the cell is placed directly below the screen and a scraper is used to squeeze the glue from the screen, causing it to leak through the mesh of the screen onto the cell. Understandably, if the screen is too close to the cell, the scraper will inevitably bend the screen as it is applied. Once it contacts the cell below the screen, it will cause the cell to crack. Furthermore, if the screen is too far from the cell, the gap between the glue and the cell will be too large, making it difficult to accurately dispense glue.

[0032] To this end, the present application provides a dispensing device that can ensure accurate and uniform dispensing of glue on the main grid-less battery cell to a certain extent while avoiding the problem of chip damage.

[0033] To help those skilled in the art better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the embodiments described are only a portion of the present invention, not all of the embodiments. All other embodiments derived by those skilled in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0034] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the dispensing device provided in an embodiment of the present application.

[0035] The dispensing device in this application is mainly used for welding reinforcement between welded ribbons and battery cells on battery cells without main grids.

[0036] In a specific embodiment of the present application, the dispensing device may include:

[0037] A glue storage box 1 is provided with a glue outlet 11 at the bottom; a control valve is provided on the glue outlet 11 of the glue storage box 1 for controlling the opening and closing of the glue outlet 11;

[0038] Multiple glue dispensing pens 2 are provided below the glue storage box 1. The glue dispensing pens 2 include a cylindrical barrel 21 for storing glue and a glue dispensing head 22 connected to the bottom end of the cylindrical barrel 21. The top end of the cylindrical barrel 21 is provided with a glue inlet 211 connected to the glue outlet 11. The bottom end of the glue dispensing head 22 has a glue dispensing port 221.

[0039] A support structure for carrying the glue dispensing pens 2, with the glue dispensing pens 2 being arranged at equal intervals along a straight line;

[0040] The bypass air pipe 3 is connected to the top section of the columnar tube 21 at one end and to the air pump 4 at the other end, and is used to evacuate air from the columnar tube to stop the glue dispensing port 221 from discharging glue, and to inflate air into the columnar tube at a uniform speed to ensure that the glue dispensing port 221 discharges glue evenly.

[0041] Reference Figure 1 In the glue dispensing device of this embodiment, a relatively large glue storage box 1 is used to store liquid glue, generally a relatively viscous UV glue. To prevent the glue in the glue storage box 1 from being too viscous and difficult to flow out of the glue outlet 11 at the bottom, an insulation layer can be provided on the outer surface of the glue storage box 1.

[0042] In addition, a plurality of glue dispensing pens 2 are provided below the glue storage box 1. The glue inlet 211 at the top of the cylindrical barrel 21 of each glue dispensing pen 2 is connected to the glue outlet 11 at the bottom of the glue storage box 1. Thus, when the control valve on the glue outlet 11 is opened, the glue in the glue storage box 1 can flow into the cylindrical barrel 21 of the glue dispensing pen 2 through the glue outlet 11; it can be understood that the cylindrical barrel 21 of the glue dispensing pen 2 is equivalent to a small container for holding glue, which can accommodate and store a certain amount of glue. When the glue dispensing head 22 of the glue dispensing pen 2 is close to the position where the solder strip 101 is welded on the battery cell 100, the glue flows out from the glue dispensing port 221 of the glue dispensing head 22, and the glue dispensing of the battery cell 100 can be achieved.

[0043] In addition, in this embodiment, a plurality of glue dispensing pens 2 are provided on the supporting structure, and each glue dispensing pens 2 can be arranged at equal intervals along a straight line, wherein the interval between two adjacent glue dispensing pens 2 can be equal to the interval between two adjacent welding strips 101 on the battery cell 100, or can be equal to an integer multiple of the interval between two adjacent welding strips 101; thus, when each glue dispensing pen 2 is located directly above the battery cell 100, each glue dispensing pen 2 can be directly facing a welding strip 101 on the battery cell 100, and as the glue dispensing pen 2 and the battery cell 100 move relative to each other along the length direction of each welding strip 101, the glue dispensing port 221 of each glue dispensing pen 2 outputs glue synchronously, such as Figure 2 As shown, each dispensing pen 2 can dispense glue to the solder strips 101 located on the same straight line, and multiple dispensing pens 2 can simultaneously dispense glue to solder points on multiple straight lines parallel to each other.

[0044] In actual applications, in order to achieve relative movement between the dispensing pen 2 and the battery cell 100, the battery cell 100 is usually laid flat on a conveyor belt, and the length direction of each welding ribbon 101 is the moving direction of the conveyor belt. Therefore, while the dispensing pen 2 remains stationary, the battery cell 100 is driven to move by the conveyor belt, thereby achieving relative movement between the dispensing pen 2 and the battery cell 100.

[0045] Furthermore, in order to further control the glue discharge from the glue dispensing port 221 of each glue dispensing pen 2 in this embodiment, the top section of the columnar barrel 21 on each glue dispensing pen 2 is further connected to the air pump 4 through the bypass air pipe 3 .

[0046] It is understood that when the control valve on the glue outlet 11 of the glue storage box 1 is opened and glue is injected into each glue pen 2, it should be ensured that the glue injected into the glue pen 2 does not bury the pipe opening connecting the bypass air pipe 3 and the glue pen 2. In actual application, the pipe opening of the bypass air pipe 3 on the glue pen 2 and the glue inlet 211 of the glue pen 2 can both be set on the end cap at the top end of the cylindrical tube 21.

[0047] On this basis, when it is necessary to add glue to the glue dispensing pen 2, the control valve on the glue outlet 11 of the glue storage box 1 is opened, and the air pump 4 can be controlled to pump air into the cylindrical cylinder 21 of each glue dispensing pen 2 through the bypass air pipe 3, so that the air pressure in the glue dispensing pen 2 is in a negative pressure state, which can be conducive to the injection of glue into the cylindrical cylinder 21. The glue injected into the cylindrical cylinder 21 cannot flow out from the glue dispensing port 221 of the glue dispensing pen 2 due to the negative pressure inside the cylindrical cylinder 21, which can also make the glue dispensing pen 2 in a state of not dispensing glue (i.e. stopping dispensing glue); as the glue in the cylindrical tube gradually increases, the air pump 4 can be used to control the cylindrical cylinder 21 to always maintain a negative pressure state, and the more glue in the cylindrical cylinder 21, the greater the negative pressure in the cylindrical cylinder 21, thereby ensuring that the negative pressure can overcome the gravity of the glue in the cylindrical cylinder 21 itself, and does not flow out from the glue dispensing port 221, thereby maintaining the glue dispensing state.

[0048] When the battery cell 100 is located directly below each dispensing pen 2, and each dispensing pen 2 corresponds one-to-one to each soldering ribbon 101 soldered on the battery cell 100, the air pump 4 can inflate each dispensing pen 2 through the bypass air pipe 3. As the air pressure in the dispensing pen 2 gradually rises, until the gravity of the glue itself can overcome the pressure difference between the inside and outside of the dispensing pen 2, the glue can flow out from the dispensing port 221. As the dispensing pen 2 and the battery cell 100 move relative to each other, the glue that continuously flows out of the dispensing pen 2 forms a straight glue line on the battery cell 100 along the extension position of the soldering ribbon 101. After the glue line solidifies, a reinforced connection between the soldering ribbon 101 and the battery cell 100 can be achieved. In addition, in order to ensure the uniformity of the glue dispensing pen 2, that is, to ensure that the glue line formed by the glue on the battery cell 100 is of uniform thickness, thereby ensuring a good bonding and reinforcement effect, when the glue dispensing pen 2 is dispensing glue, the air pump 4 can inflate the glue dispensing pen 2 at a uniform speed, thereby making the air pressure in the glue dispensing pen 2 gradually and evenly increase, and the glue can also flow out of the glue dispensing pen 2 evenly, thereby ensuring that the glue line on the battery cell 100 is of uniform thickness, thereby further ensuring the bonding and reinforcement effect between the battery cell 100 and the soldering tape 101.

[0049] In an optional implementation of this embodiment, the dispensing port 221 at the bottom end of the dispensing head 22 of the dispensing pen 2 may be a rectangular port with a length of 0.12 mm to 0.3 mm and a width of 0.1 mm to 0.3 mm.

[0050] The length direction of the rectangular opening is parallel to the direction in which the glue pens 2 are arranged in sequence, while the width direction of the rectangular opening is perpendicular to the direction in which the glue pens 2 are arranged in sequence.

[0051] Therefore, compared with the circular glue dispensing port 221 , the rectangular port in this embodiment has a larger contact area between the glue line and the soldering strip 101 , which can better wrap the soldering strip 101 and thereby ensure the bonding effect of the glue on the soldering strip 101 .

[0052] Based on the above discussion, the dispensing device of this embodiment uses a dispensing pen 2 to dispense glue at the position of the soldering ribbon 101 on the battery cell 100. Compared with screen printing, it can effectively avoid the problem of cracking caused by screen printing; at the same time, it can better make each dispensing pen 2 and the soldering ribbon 101 accurately aligned, thereby ensuring the accuracy of the dispensing position; on this basis, this embodiment also connects a bypass air pipe 3 and an air pump 4 to each dispensing pen 2 to achieve the glue dispensing state of the dispensing pen 2, and when the dispensing pen 2 dispenses glue on the battery cell 100, the air pump 4 can be used to evenly inflate the dispensing pen 2 to achieve uniform dispensing of glue on the battery cell 100, thereby effectively improving the dispensing effect of the battery cell 100.

[0053] Based on the above embodiment, in another optional embodiment of the present application, the support structure for supporting each dispensing pen 2 in the dispensing device may further include:

[0054] A horizontal track 51 and a driving device 52 connected to the horizontal track 51;

[0055] The dispensing pens 2 are arranged in sequence along the length direction of the horizontal track 51;

[0056] The driving device 52 is used to drive the horizontal track 51 to drive each dispensing pen 2 to move synchronously along the length direction of the horizontal track 51.

[0057] like Figure 2 As shown, in the same photovoltaic module, the number of cells 100 connected by welding with welding ribbons 101 is often relatively large, and accordingly, the number of parallel welding ribbons 101 is also relatively large. Obviously, the number of dispensing pens 2 in the dispensing device is limited. The dispensing pens 2 and the cell 100 move relative to each other along a straight line once, and it is difficult for the dispensing pens 2 to dispense glue to all the welding ribbons 101 at once. To this end, after each dispensing pen 2 has dispensed glue to the welding ribbons 101 on multiple straight lines on the cell 100 of the same photovoltaic module at one time, the dispensing pen 2 and the cell 100 need to be translated perpendicularly to the length direction of the welding ribbon 101, so that each dispensing pen 2 is facing the next group of un-glued welding ribbons 101 and dispenses glue to this group of welding ribbons 101.

[0058] To this end, in this embodiment, the various dispensing pens 2 are arranged in a straight line on the horizontal track 51. On this basis, the horizontal track 51 is further connected to a driving device 52, which can be a driving motor. The driving device 52 drives the horizontal track 51 to move in the horizontal direction, and the various dispensing pens 2 located on the horizontal track 51 can move accordingly, thereby realizing the synchronous translation of each dispensing pen 2 relative to the battery cell 100, and then starting to realize the one-time dispensing of the next group of multiple welding strips 101. This can be repeated to realize the dispensing of the positions of the welding strips 101 on all battery cells 100 in a photovoltaic module in batches.

[0059] Of course, in actual application, this embodiment does not rule out directly setting each battery cell 100 on a flat plate that can perform two-dimensional movement. When the dispensing pen 2 remains stationary, the flat plate drives the battery cell 100 to move along the length direction of the welding ribbon 101, and the dispensing pen 2 can complete the dispensing of a group of welding ribbons 101 on multiple straight lines; and after the dispensing of a group of welding ribbons 101 is completed, the flat plate can further drive the battery cell 100 to move a certain distance perpendicular to the length direction of the welding ribbon 101, so that each dispensing pen 2 is respectively facing the next group of welding ribbons 101 on multiple straight lines, and then repeatedly controls the flat plate to drive the battery cell 100 to move along the length direction of the welding ribbon 101 to realize the dispensing of this group of welding ribbons 101. Repeating this process can also gradually realize the dispensing of each group of welding ribbons 101.

[0060] On this basis, in another optional embodiment of the present application, the support structure of the dispensing device may further include: a lifting component connected to the horizontal track 51, used to drive the horizontal track 51 to drive each dispensing pen 2 to move up and down in the vertical direction.

[0061] In this embodiment, the horizontal track 51 is further connected to the lifting assembly. When the lifting assembly drives the horizontal track 51 to move up and down in the vertical direction, it can also drive each dispensing pen 2 to move up and down synchronously. Therefore, when each dispensing pen 2 dispenses glue on the position where the solder ribbon 101 is located on the battery cell 100, the dispensing port 221 of each dispensing pen 2 can be lowered to a height position closer to the solder ribbon 101. This prevents the glue from falling too high from the dispensing port 221 to the surface of the contact solder ribbon 101, which would cause the glue to be inaccurately dispensed and the glue to spread over a large area on the battery cell 100 after falling. It can be seen that the use of the lifting assembly in this embodiment can achieve more accurate dispensing of glue by the dispensing pen 2 on the position where the solder ribbon 101 is located on the battery cell 100.

[0062] In actual application, the lifting assembly may include at least two vertical telescopic guide rails 53 connected to the glue storage box 1 at one end and the horizontal track 51 at the other end. In addition, a lifting motor 54 is also provided on the glue storage box 1. The lifting motor 54 drives the vertical telescopic guide rail 53, so that the length of the vertical telescopic guide rail 53 can be extended and retracted, thereby driving the horizontal track 51 and each glue pen 2 to move up and down synchronously with the length change of the vertical telescopic guide rail 53.

[0063] It is understandable that in actual applications, the lifting component is not limited to the above-mentioned implementation method. For example, a vertical slide rail whose length does not change can also be set, and the horizontal track 51 and the vertical guide rail are connected by a slider. The motor drives the slider to slide up and down on the vertical slide rail, and the horizontal track 51 and each dispensing pen 2 can also be lifted and lowered synchronously in the vertical direction.

[0064] In order to more accurately control the up and down position of each dispensing pen 2, in this embodiment, a laser distance measuring device can be further set on the horizontal track 51 to measure the distance between the horizontal track 51 and the battery cell 100 below it. Based on the distance data measured by the laser distance measuring device, the height position of the horizontal track 51 can be reasonably controlled, so that the dispensing pen 2 can be lowered to the most suitable position when dispensing.

[0065] On this basis, in order to adapt to the up and down lifting activities of the dispensing pen 2, the glue inlet 211 on the dispensing pen 2 in this embodiment and the glue outlet 11 of the glue storage box 1 can be connected by an elastic hose 6. Specifically, the elastic hose 6 can be a rubber tube; in actual application, the elastic hose 6 can always be kept in an extended state, thereby ensuring that the glue can flow out of the elastic hose 6 into the dispensing pen 2 more smoothly; of course, the length of the elastic hose 6 in the undeformed state can also be equal to the distance between the glue outlet 11 and the glue inlet 211 when the dispensing pen 2 rises to the position closest to the glue storage box 1 along the horizontal track 51.

[0066] As described above, in the dispensing device, the spacing between two adjacent dispensing pens 2 should be equal to the spacing between two adjacent welding strips 101, or equal to an integer multiple of the spacing between two adjacent welding strips 101. However, in actual applications, the spacing between adjacent welding strips 101 of photovoltaic modules of different specifications and sizes may be slightly different. Therefore, in order to enable the dispensing device to better meet the dispensing of solar cells 100 in photovoltaic modules of different specifications and models, in another optional embodiment of the present application, the support structure of the dispensing device may further include:

[0067] Multiple identical telescopic springs 55 and telescopic motors 56;

[0068] Among them, any two adjacent dispensing pens 2 are connected by a telescopic spring 55;

[0069] The telescopic motor 56 is provided at the end of the first end of the horizontal track 51 and is connected to the dispensing pen 2 closest to the first end of the horizontal track 51 through the telescopic spring 55;

[0070] The glue dispensing pen 2 closest to the second end of the horizontal track 51 is connected to the end of the second end of the horizontal track 51 through the telescopic spring 55.

[0071] Reference Figure 1Because the telescopic springs 55 in this embodiment are the same, that is, the elastic coefficient and spring length of each telescopic spring 55 are the same, then when the telescopic motor 56 applies a push-pull force to the telescopic spring 55 connected to it, the push-pull force can be transmitted between each dispensing pen 2 and each telescopic spring 55, thereby causing each telescopic spring 55 to undergo the same telescopic change synchronously, that is, synchronously change the length of each telescopic spring 55, and then synchronously drive each dispensing pen 2 to slide on the horizontal track 51, that is, change the distance between each adjacent dispensing pen 2; in actual application, the length of each telescopic spring 55 can be reasonably controlled based on the distance between two adjacent welding strips 101 on the battery cell 100 to be glued, so that the distance between each dispensing pen 2 and the distance between adjacent welding strips 101 are adapted to each other. It can be seen that in this embodiment, only one telescopic motor 56 and multiple telescopic springs 55 are used to synchronously adjust the distance between all the glue pens 2, without the need to specifically adjust the position of each glue pen 2 on the horizontal track 51, thereby simplifying the difficulty of adjusting the distance between the glue pens 2.

[0072] Based on any of the above embodiments, in another optional embodiment of the present application, the dispensing device may further include: a constant temperature device provided on the cylindrical tube 21 that wraps each dispensing pen 2.

[0073] As mentioned above, the glue used in this application is generally UV glue, and UV glue needs to be heated for curing. For this reason, in this embodiment, a constant temperature device is used to appropriately heat the glue in the cylindrical barrel 21 of the glue dispensing pen 2 during dispensing. On the one hand, the heated glue can flow out of the glue dispensing pen 2 more smoothly. On the other hand, the heated glue can also be cured more quickly after falling onto the battery cell 100, thereby accelerating the curing efficiency.

[0074] In addition, in actual application, the constant temperature device may include a constant temperature water tank and a control component whose height is less than the height of the cylindrical barrel 21. Each dispensing pen 2 can pass through the constant temperature water tank, and the cylindrical barrel 21 is in contact with the liquid water in the constant temperature water tank; and the liquid water circulates between the constant temperature water tank and the temperature control device. The temperature control device is used to control the temperature of the liquid water within the set temperature range, thereby heating and controlling the temperature of the glue in the dispensing pen 2 through the liquid water.

[0075] In summary, the glue dispensing device of the present application uses a glue dispensing pen to perform glue dispensing reinforcement on the position where the solder strip is welded on the main grid-free battery, without the need for a scraper to scrape the glue, thereby effectively avoiding the problem of cracks in the main grid-free battery. On this basis, the present application further provides a bypass air pipe on the cylindrical tube of the glue dispensing pen, and the bypass air pipe is connected to an air pump, so that the bypass air pipe and the air pump can be used to control the air pressure in the glue dispensing pen; by controlling the glue dispensing pen to be in a negative pressure state, the glue in the glue dispensing pen cannot flow out from the glue dispensing port, thereby stopping the glue dispensing, and the glue dispensing pen can be inflated at a uniform speed by the air pump, thereby ensuring the uniform glue dispensing at the glue outlet, that is, ensuring the uniformity of glue dispensing on the main grid-free battery. It can be seen from this that the glue dispensing device in the present application will not cause crack damage to the main grid-free battery cell, and can also achieve uniform glue dispensing on the main grid-free battery cell, which is conducive to ensuring a stable connection between the solder strip and the battery cell, thereby improving the yield rate of the battery cell.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements are inherent to the elements. In the absence of further restrictions, the elements limited by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. In addition, the above-mentioned technical solutions provided in the embodiments of the present application are not described in detail in accordance with the corresponding technical solutions in the prior art to achieve the same principle, so as to avoid excessive elaboration.

[0077] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A dispensing device, characterized in that: include: A glue storage box is provided with a glue outlet at the bottom; a control valve is provided on the glue outlet of the glue storage box to control the opening and closing of the glue outlet; A plurality of glue dispensing pens are provided below the glue storage box; wherein the glue dispensing pens include a cylindrical barrel for storing glue and a glue dispensing head connected to the bottom end of the cylindrical barrel; a glue inlet connected to the glue outlet is provided at the top end of the cylindrical barrel; and a glue dispensing port is provided at the bottom end of the glue dispensing head; A support structure for carrying the dispensing pens, wherein the dispensing pens are arranged at equal intervals along a straight line; A bypass air pipe, one end of which is in air communication with the top section of the cylindrical barrel and the other end of which is in air communication with the air pump, is used to evacuate air from the cylindrical barrel to stop the dispensing port from discharging glue, and to inflate air into the cylindrical barrel at a uniform speed to ensure that the dispensing port discharges glue evenly.

2. The dispensing device according to claim 1, characterized in that: The support structure includes a horizontal track and a driving device connected to the horizontal track; The dispensing pens are arranged in sequence on the horizontal track along the length direction of the horizontal track; The driving device is used to drive the horizontal track to drive each of the dispensing pens to move synchronously along the length direction of the horizontal track.

3. The dispensing device according to claim 2, characterized in that: The support structure includes a lifting component connected to the horizontal track, which is used to drive the horizontal track to drive each of the dispensing pens to move up and down in the vertical direction.

4. The dispensing device according to claim 3, characterized in that: The lifting assembly includes a vertical telescopic guide rail with one end connected to the glue storage box and the other end connected to the end of the horizontal track; and a lifting motor for driving the vertical telescopic guide rail to telescope in the vertical direction.

5. The dispensing device according to claim 3, characterized in that: A laser distance measuring device is also provided on the horizontal track.

6. The dispensing device according to claim 3, characterized in that: The glue inlet of the glue dispensing pen is connected to the glue outlet of the glue storage box through an elastic hose.

7. The dispensing device according to claim 2, characterized in that: The support structure also includes a plurality of identical telescopic springs and a telescopic motor; Wherein, any two adjacent dispensing pens are connected by the telescopic spring; The telescopic motor is arranged at the end of the first end of the horizontal track and is connected to the glue dispensing pen closest to the first end of the horizontal track through the telescopic spring; The glue dispensing pen closest to the second end of the horizontal track is connected to the end of the second end of the horizontal track through the telescopic spring.

8. The dispensing device according to claim 1, wherein: The dispensing port is a rectangular port with a length of 0.12mm-0.3mm and a width of 0.1mm-0.3mm; The length direction of the rectangular opening is parallel to the straight line direction in which the glue pens are arranged in sequence, and the width direction of the rectangular opening is perpendicular to the straight line direction in which the glue pens are arranged in sequence.

9. The dispensing device according to claim 1, wherein: It also includes a constant temperature device provided on the cylindrical tube that wraps each of the dispensing pens.

10. The dispensing device according to claim 1, wherein: The outer surface of the glue storage box is provided with a heat-insulating layer.

Images