Gluing device

Abstract

The utility model discloses a glue applying device which is used for applying glue to battery strings, the glue applying device comprises a first conveying mechanism and a first glue applying mechanism, a first glue applying station is arranged on a conveying path of the first conveying mechanism, and the first conveying mechanism is configured to convey stacked or serially connected battery strings to the first glue applying station; the first sizing mechanism is arranged at the first sizing station, and the first sizing mechanism is configured to perform sizing on each overlapped part of the battery string passing through the first sizing station. According to the glue applying device, automatic glue applying on each overlapping part of the stacked or serially connected battery strings is realized, so that when a subsequent laminating machine laminates the battery strings, the glue at the overlapping parts and a welding strip are stressed together, the overlapping parts of the battery strings are not easy to crack, and the yield of battery string processing is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cell manufacturing, and in particular to a glue applying device. Background Art

[0002] The string welding process is an important process in the production of photovoltaic cells, which is used to weld multiple cells through welding ribbons to form a cell string.

[0003] Overlap welding process is one of the existing welding processes, such as Figure 1 As shown, it is a schematic diagram of the structure of a battery string formed by the existing overlap-type string welding process. For two adjacent battery cells 100 in the battery string formed by the string welding process, the head of the rear battery cell 100 is overlapped on the tail of the front battery cell 100 to form an overlapping portion, the front section of the welding ribbon 101 is located on the upper surface of the front battery cell 100, and the rear section of the welding ribbon 101 is located on the lower surface of the rear battery cell 100.

[0004] In the existing lap-type string welding process, the battery strings need to be laminated by a laminator. During lamination, at the overlapping part, since the welding ribbon 101 has a certain thickness, when the battery cell 100 is pressed on the welding ribbon 101, it is easy to cause the overlapping part of the two adjacent battery cells 100 to crack. Utility Model Content

[0005] The purpose of the present application is to provide a glue applying device to solve the problem in the prior art that the overlapping portion of two adjacent battery cells is prone to cracking when laminating the battery string through a laminator in the overlapped string welding process.

[0006] To achieve this goal, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a glue applying device for applying glue to a battery string, wherein the battery string includes at least two battery cells connected in series according to a stringing rule and at least one set of welding ribbons, wherein the front section of each set of welding ribbons is located on the upper surface of the preceding battery cell, and the rear section of each set of welding ribbons is located on the lower surface of the following battery cell, and the edges of two adjacent battery cells overlap each other. The glue applying device includes a first conveying mechanism and a first glue applying mechanism, wherein:

[0008] A first gluing station is provided on the conveying path of the first conveying mechanism, and the first conveying mechanism is configured to convey the stacked or serially connected battery strings to the first gluing station;

[0009] The first glue applying mechanism is disposed at the first glue applying station and is configured to apply glue to each overlapping portion of the battery string passing through the first glue applying station.

[0010] Through the cooperation of the first conveying mechanism and the first gluing mechanism, the stacked or serially connected battery strings are automatically conveyed to the first gluing station and glue is automatically applied to each overlapping part of the battery strings passing through the first gluing station, with a high degree of automation and high gluing efficiency. At the same time, when the subsequent laminator laminates the battery strings, the glue at the overlapping parts is mainly used to bear the force together with the welding ribbon, which is not easy to cause the overlapping parts of the battery strings to crack, greatly improving the yield rate of the battery string processing. Moreover, the glue at the overlapping parts also plays a certain connecting role for the two adjacent battery cells, which is beneficial to improving the reliability of the battery cell serial connection.

[0011] Optionally, the first gluing mechanism includes a first gluing component and an air blowing component, wherein:

[0012] A blowing station is further provided on the conveying path of the first conveying mechanism, the blowing station is arranged after the first gluing station, the first gluing assembly is arranged at the first gluing station, the blowing assembly is arranged at the blowing station, and the first conveying mechanism is further configured to convey the battery string to the blowing station;

[0013] The first glue applying assembly is configured to apply glue to a preset position on the edge of the lower battery cell of the two adjacent battery cells at the first glue applying station;

[0014] The blowing assembly is configured to blow air to the glue on the edge of the lower battery cell of the two adjacent battery cells on the blowing station, so as to blow the glue on the edge of the lower battery cell into the overlapping parts.

[0015] Through the first gluing component, automatic gluing is achieved at a preset position on the edge of the lower battery cell of the two adjacent battery cells at the first gluing station; through the blowing component, the glue on the edge of the lower battery cell is blown into the overlapping part between the two adjacent battery cells, providing a first gluing mechanism with simple structure, ingenious design and low cost.

[0016] Optionally, the first glue application assembly includes a base, a mounting frame, a UVW platform, a lifting drive mechanism, a translation drive mechanism, a screen module and a scraper module, wherein:

[0017] The mounting frame is escalably mounted on the base, a fixed end of the elevating drive mechanism is mounted on the base, a driving end of the elevating drive mechanism is connected to the mounting frame, and the elevating drive mechanism is configured to drive the mounting frame to elevate;

[0018] The UVW platform is installed on the mounting frame, the screen module is installed at the bottom of the UVW platform, and the scraper module is installed on the mounting frame in a translationally movable manner, with the scraper module resting against the upper side of the screen module from above;

[0019] The fixed end of the translation drive mechanism is installed on the mounting frame, and the driving end of the translation drive mechanism is connected to the scraper module;

[0020] The lifting drive mechanism drives the mounting frame to descend, thereby driving the screen module to descend to the preset glue dispensing position. The translation drive mechanism drives the scraper module to translate, thereby scraping the glue on the screen frame of the screen module out of the mesh holes. The glue overflowing from the mesh holes is applied to the preset position on the edge of the lower battery cell of the two adjacent battery cells at the first gluing station.

[0021] Through the cooperation of the base, the mounting frame, the UVW platform, the lifting drive mechanism, the translation drive mechanism, the screen module and the scraper module, a first gluing component with high gluing efficiency and good gluing quality is provided.

[0022] Optionally, a blowing assembly is arranged above the blowing station, and the blowing assembly includes an air supply component and an air path. The air supply component is configured to supply high-pressure gas into the air path, and the high-pressure gas is blown out obliquely downward through the air flow output port of the air path to blow the glue on the edge of the battery cell located below into between the overlapping parts.

[0023] By cooperating with the air supply component, the air path and the air flow output port, the glue on the edge of the battery cell is automatically blown away, providing an air blowing component with a simple structure and good blowing effect.

[0024] Optionally, the gluing device also includes a first curing mechanism, and a first curing station is also arranged on the conveying path of the first conveying mechanism. The first curing station is arranged after the blowing station. The first conveying mechanism is also configured to convey the battery string to the first curing station. The first curing mechanism is arranged at the first curing station. The first curing mechanism is configured to cure the glue at each overlapping part of the battery string passing through the first curing station.

[0025] By providing the first curing mechanism, online curing of the glue at each overlapping portion of the battery string passing through the first curing station is achieved.

[0026] Optionally, the glue is UV glue, and the first curing mechanism includes a bracket and a UV light box arranged on the bracket, and the UV light box is arranged above the first curing station.

[0027] By selecting UV glue and using a UV light box to cure the glue at the overlapping parts, a method of curing the glue using ultraviolet rays is provided. Because the battery strings cannot be heated after stringing, thermosetting glue cannot be used. Selecting UV glue and curing it with a UV light box will not affect the battery strings.

[0028] Optionally, the gluing device also includes a first detection mechanism, and a first detection station is also provided on the conveying path of the first conveying mechanism, the first detection station is arranged in front of the first gluing station, the first conveying mechanism is also configured to convey the battery string after stringing to the first detection station, the first detection mechanism is arranged at the first detection station, the first detection mechanism is configured to take pictures and locate the battery string after stringing that passes through the first detection station, and the first gluing mechanism applies glue to the overlapping part according to the measured battery string position.

[0029] By setting up the first detection mechanism, the battery string after stringing can be photographed and positioned, and the first gluing mechanism applies glue to the overlapping part according to the measured battery string position, thereby improving the gluing accuracy of the gluing device.

[0030] In a second aspect, the present application provides a glue applying device for applying glue to a battery cell, the glue applying device comprising a second conveying mechanism and a second glue applying mechanism, wherein:

[0031] A second gluing station is provided on the conveying path of the second conveying mechanism, and the second conveying mechanism is configured to convey the battery cell to the second gluing station;

[0032] The second glue applying mechanism is disposed at the second glue applying station, and is configured to apply glue to one edge of the battery cell passing through the second glue applying station.

[0033] Through the cooperation of the second conveying mechanism and the second gluing mechanism, the battery cells are automatically conveyed to the second gluing station and glue is applied to one edge of the battery cells passing through the second gluing station. The gluing method is simple and the gluing efficiency is high. When the battery cells after glue application are subsequently connected in series, there is glue between the overlapping parts of the two adjacent battery cells in the battery string. When the laminator laminates the battery string, the glue at the overlapping parts is mainly used to bear the force together with the welding ribbon, and it is not easy to cause the overlapping parts of the battery string to crack, which greatly improves the yield rate of the battery string processing. Moreover, the glue at the overlapping parts also plays a certain connecting role for the two adjacent battery cells, which is beneficial to improving the reliability of the battery cell series connection.

[0034] Optionally, the gluing device also includes a second detection mechanism, and a second detection station is also provided on the conveying path of the second conveying mechanism. The second detection station is arranged at the rear of the second gluing station. The second conveying mechanism is also configured to convey the battery cell to the second detection station. The second detection mechanism is arranged at the second detection station. The second detection mechanism is configured to take photos and detect the glue on the edge of the battery cell passing through the second detection station.

[0035] By setting up the second detection mechanism, the glue on the edge of the battery cell can be photographed and detected to ensure the glue application quality of the glue application device.

[0036] Optionally, the gluing device also includes a third detection mechanism, a third detection station is also provided on the conveying path of the second conveying mechanism, the third detection station is arranged in front of the second gluing station, the second conveying mechanism is also configured to convey the battery cell to the third detection station, the third detection mechanism is arranged at the third detection station, the third detection mechanism is configured to take pictures and locate the battery cell passing through the third detection station, and the second gluing mechanism applies glue to one edge of the battery cell according to the measured battery cell position.

[0037] By setting up the third detection mechanism, the battery cell passing through the third detection station can be photographed and positioned, and the second glue applying mechanism applies glue to one edge of the battery cell according to the measured battery cell position, thereby improving the glue applying accuracy of the glue applying device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of a battery string formed by the existing lap-type string welding process;

[0039] Figure 2 This is a schematic diagram of the three-dimensional structure of a glue-applying device provided in Example 1 of the present application;

[0040] Figure 3 This is a schematic diagram of the three-dimensional structure of a first glue-applying component of a glue-applying device provided in Example 1 of the present application;

[0041] Figure 4 This is another schematic diagram of the three-dimensional structure of the first gluing component of the gluing device provided in Example 1 of the present application;

[0042] Figure 5 This is a schematic diagram of the installation of an air blowing assembly of a glue-applying device provided in Example 1 of the present application;

[0043] Figure 6 This is a side view schematic diagram of a battery string after glue application by a glue application device provided in Example 1 of the present application;

[0044] Figure 7 This is a schematic top view of a battery string after glue application by a glue application device provided in Example 1 of the present application;

[0045] Figure 8 This is a schematic diagram of a glue application device provided in Example 1 of the present application applying glue dots to a battery cell located below;

[0046] Figure 9 This is a schematic diagram of a glue applying device provided in Example 1 of the present application applying a glue strip to a battery cell located below;

[0047] Figure 10 This is a schematic diagram of a glue applying device provided in Example 1 of the present application applying a tape to a battery cell located below;

[0048] Figure 11 This is a schematic diagram of the three-dimensional structure of a glue-applying device provided in Example 2 of the present application;

[0049] Figure 12 This is a schematic diagram of a glue application device provided in Example 2 of the present application applying glue dots to one edge of a battery cell;

[0050] Figure 13 This is a schematic diagram of a glue applying device provided in Example 2 of the present application applying a glue strip to one edge of a battery cell;

[0051] Figure 14 This is a schematic diagram of a glue applying device provided in Example 2 of the present application applying a tape to one edge of a battery cell;

[0052] Figure 15 This is a structural diagram of a battery cell and a soldering ribbon connected in series after being glued by a glue-applying device provided in Example 2 of the present application.

[0053] Figures 1 to 15 The following reference numerals are included:

[0054] Battery cell 100, solder ribbon 101, glue 102, glue dots 1020, glue strip 1021, and adhesive tape 1022;

[0055] First conveying mechanism 20, conveyor belt 21, adsorption holes 210, second conveying mechanism 22;

[0056] First glue applying mechanism 30, first glue applying assembly 31, base 310, mounting frame 311, UVW platform 312, lifting drive mechanism 313, translation drive mechanism 314, screen module 315, scraper module 316, mesh 317, air blowing assembly 32, air flow outlet 320, second glue applying mechanism 33;

[0057] First gluing station 40, blowing station 41, first curing station 42, first testing station 43, second gluing station 44;

[0058] First curing mechanism 50, UV light box 500;

[0059] The first detection mechanism 60 . DETAILED DESCRIPTION

[0060] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0061] The string welding process is an important process in the production of photovoltaic cells, which is used to weld multiple cells through welding ribbons to form a cell string.

[0062] Overlap welding process is one of the existing welding processes, such as Figure 1 As shown, it is a schematic diagram of the structure of a battery string formed by the existing overlap-type string welding process. For two adjacent battery cells 100 in the battery string formed by the string welding process, the head of the rear battery cell 100 is overlapped on the tail of the front battery cell 100 to form an overlapping portion, the front section of the welding ribbon 101 is located on the upper surface of the front battery cell 100, and the rear section of the welding ribbon 101 is located on the lower surface of the rear battery cell 100.

[0063] The existing lap-type string welding process requires the battery string to be laminated by a laminator ( Figure 1 The direction of the middle arrow is the direction of force at the overlapping portion). During lamination, at the overlapping portion, since the solder ribbon 101 has a certain thickness, when the battery cell 100 is pressed against the solder ribbon 101, it is easy to cause the overlapping portion of two adjacent battery cells 100 to crack.

[0064] Therefore, in the first aspect, the present application proposes two embodiments of the gluing device. The two different embodiments of the gluing device are described in detail below:

[0065] Example 1

[0066] See also Figure 2 and Figure 6 As shown, an embodiment of the present application proposes a gluing device for gluing a battery string, wherein the battery string includes at least two battery cells 100 and at least one group of welding strips 101 connected in series according to a stringing rule, the front section of each group of welding strips 101 is located on the upper surface of the front battery cell 100, and the rear section of each group of welding strips 101 is located on the lower surface of the rear battery cell 100, and the edges of two adjacent battery cells 100 overlap up and down, and the gluing device includes a first conveying mechanism 20 and a first gluing mechanism 30, wherein: a first gluing station 40 is provided on the conveying path of the first conveying mechanism 20, and the first conveying mechanism 20 is configured to convey the stacked or serially connected battery strings to the first gluing station 40; the first gluing mechanism 30 is provided at the first gluing station 40, and the first gluing mechanism 30 is configured to apply glue to each overlapping portion of the battery string passing through the first gluing station 40.

[0067] Specifically, the first conveying mechanism 20 conveys the stacked or serially connected battery strings in a stepping manner. The first conveying mechanism 20 adopts a belt conveyor line. The conveyor belt 21 of the belt conveyor line is provided with adsorption holes 210. The negative pressure adsorption device adsorbs the stacked or serially connected battery strings toward the conveyor belt 21 through the adsorption holes 210 to avoid displacement of the battery strings on the conveyor belt 21 during transportation, thereby ensuring the accuracy of the battery strings transported by the first conveying mechanism 20.

[0068] Through the cooperation of the first conveying mechanism 20 and the first gluing mechanism 30, the stacked or serially connected battery strings are automatically conveyed to the first gluing station 40, and glue is automatically applied to each overlapping portion of the battery strings passing through the first gluing station 40, with a high degree of automation and high gluing efficiency. When the subsequent laminator laminates the battery strings, the glue 102 at the overlapping portions is mainly used to bear force together with the welding ribbon 101, which is not likely to cause the overlapping portions of the battery strings to crack, thereby greatly improving the yield rate of the battery string processing. Moreover, the glue 102 at the overlapping portions also plays a certain connecting role for the two adjacent battery cells 100, which is beneficial to improving the reliability of the battery cell serial connection.

[0069] See also Figures 2 to 5 As shown, as an embodiment, the first gluing mechanism 30 includes a first gluing component 31 and a blowing component 32, wherein: a blowing station 41 is also provided on the conveying path of the first conveying mechanism 20, the blowing station 41 is provided at the rear of the first gluing station 40, the first gluing component 31 is provided at the first gluing station 40, the blowing component 32 is provided at the blowing station 41, and the first conveying mechanism 20 is further configured to convey the battery string to the blowing station 41; the first gluing component 31 is configured to apply glue to a preset position of the edge of the lower battery cell 100 of the two adjacent battery cells 100 on the first gluing station 40; the blowing component 32 is configured to blow the glue 102 on the edge of the lower battery cell 100 of the two adjacent battery cells 100 on the blowing station 41, so as to blow the glue 102 on the edge of the lower battery cell 100 into between the overlapping parts.

[0070] Specifically, the first glue application assembly 31 includes a base 310, a mounting frame 311, a UVW platform 312, a lifting drive mechanism 313, a translation drive mechanism 314, a screen module 315, and a scraper module 316. The mounting frame 311 is escalably mounted on the base 310. The fixed end of the lifting drive mechanism 313 is mounted on the base 310. The driving end of the lifting drive mechanism 313 is connected to the mounting frame 311. The lifting drive mechanism 313 is configured to drive the mounting frame 311 to move up and down. The UVW platform 312 is installed on the mounting frame 311, the screen module 315 is installed at the bottom of the UVW platform 312, and the scraper module 316 is installed on the mounting frame 311 in a translationally movable manner. The scraper module 316 rests against the upper side of the screen module 315 from above. The fixed end of the translation drive mechanism 314 is installed on the mounting frame 311, and the driving end of the translation drive mechanism 314 is connected to the scraper module 316. The translation drive mechanism 314 can use a motor and a belt drive assembly to achieve translation drive.

[0071] The lifting drive mechanism 313 can realize lifting drive by the cooperation of a motor, a screw nut mechanism, etc. The lifting drive mechanism 313 drives the mounting frame 311 to descend, so as to drive the screen module 315 to descend to the preset glue dispensing position. The translation drive mechanism 314 drives the scraper module 316 to translate, so as to scrape the glue on the screen frame of the screen module 315 out of the mesh 317. The glue overflowing from the mesh 317 is applied to the preset position of the edge of the lower battery cell 100 of the two adjacent battery cells 100 in the first gluing station 40.

[0072] Specifically, the mesh 317 can be a circular hole, a strip hole or a narrow slit, so that the overflowed glue 102 is glue dots, glue strips or glue tape. The mesh 317 can be one row or multiple rows to dispense glue to one battery cell 100 or to multiple battery cells 100 at the same time.

[0073] Specifically, the blowing assembly 32 is arranged above the blowing station 41. The blowing assembly 32 includes an air supply component and an air path. The air supply component is configured to supply high-pressure gas into the air path. The high-pressure gas is blown out obliquely downward through the air flow output port 320 of the air path to blow the glue 102 on the edge of the battery cell 100 located below into between the overlapping parts.

[0074] Through the first glue applying component 31, glue is automatically applied to the preset position of the edge of the lower battery cell 100 of the two adjacent battery cells 100 on the first glue applying station 40; through the blowing component 32, the glue on the edge of the lower battery cell 100 is blown into the overlapping part between the two adjacent battery cells 100, providing a first glue applying mechanism 30 with a simple structure, ingenious design and low cost.

[0075] It should be noted that, in order to ensure that the gas can blow glue 102 of different shapes into the overlapping parts, the airflow outlet 320 can be designed as multiple circular holes, multiple strip holes or a narrow slit, so as to be able to blow corresponding glue points, glue strips or glue tapes.

[0076] As an embodiment, the gluing device also includes a first curing mechanism 50, and a first curing station 42 is also provided on the conveying path of the first conveying mechanism 20. The first curing station 42 is arranged after the blowing station 41. The first conveying mechanism 20 is also configured to convey the battery string to the first curing station 42. The first curing mechanism 50 is arranged in the first curing station 42. The first curing mechanism 50 is configured to cure the glue 102 at each overlapping part of the battery string passing through the first curing station 42.

[0077] Specifically, the glue 102 is UV glue, and the first curing mechanism 50 includes a bracket and a UV light box 500 disposed on the bracket. The UV light box 500 is disposed above the first curing station 42 .

[0078] Specifically, the air blowing assembly 32 can be installed on the bracket where the UV light box 500 is located. The overall structure is compact and occupies little space.

[0079] By providing the first curing mechanism 50 , online curing of the glue 102 at each overlapping portion of the battery string passing through the first curing station 42 is achieved.

[0080] As an embodiment, the gluing device also includes a first detection mechanism 60, and a first detection station 43 is also provided on the conveying path of the first conveying mechanism 20. The first detection station 43 is arranged in front of the first gluing station 40. The first conveying mechanism 20 is also configured to convey the battery string after stringing to the first detection station 43. The first detection mechanism 60 is arranged at the first detection station 43. The first detection mechanism 60 is configured to take pictures and locate the battery string after stringing that passes through the first detection station 43. The first gluing mechanism 30 applies glue to the overlapping part according to the measured battery string position.

[0081] Specifically, the first detection mechanism 60 includes an industrial camera disposed above the first detection station 43 .

[0082] By providing the first detection mechanism 60 , the battery string after assembly can be photographed and positioned. The first gluing mechanism 30 applies glue to the overlapping portion according to the measured battery string position, thereby improving the gluing accuracy of the gluing device.

[0083] The specific working process of the glue applying device proposed in this embodiment is as follows:

[0084] Move the stacked or serially connected battery strings to the first conveying mechanism 20;

[0085] The first conveying mechanism 20 conveys the battery string in steps through the first inspection station 43. The first inspection mechanism 60 photographs and locates the battery string on the first inspection station 43 to obtain the position information of the battery string.

[0086] The first conveying mechanism 20 conveys the battery string in steps through the first gluing station 40 , and the first gluing mechanism 30 applies glue to a preset position on the edge of the lower battery cell 100 between two adjacent battery cells 100 of the battery string on the first gluing station 40 according to the measured battery string position;

[0087] The first conveying mechanism 20 conveys the battery string in a stepwise manner through the blowing station 41 , and the blowing assembly 32 blows air on the glue 102 on the edge of the lower battery cell 100 of the two adjacent battery cells 100 on the blowing station 41 , so as to blow the glue 102 on the edge of the lower battery cell 100 into the space between the overlapping parts;

[0088] The first conveying mechanism 20 conveys the battery string in steps through the first curing station 42 , and the first curing mechanism 50 cures the glue 102 at each overlapping portion of the battery string passing through the first curing station 42 ;

[0089] The first conveying mechanism 20 conveys the battery string that has passed through the first curing station 42 to the next process.

[0090] The glue applying device proposed in this embodiment has the following advantages:

[0091] 1) Automatic glue application is achieved on each overlapping part of stacked or serially connected battery strings, with high automation and high glue application efficiency;

[0092] 2) The adhesive 102 on the edge of the lower battery cell 100 is blown into the overlapped portion by the blowing assembly 32 . This is a clever design with low cost and easy implementation.

[0093] 3) Using UV light to cure the glue 102 will not affect the battery string;

[0094] 4) Before gluing, the first detection mechanism 60 takes a photo of the assembled battery string to locate the battery string, thereby improving the gluing accuracy of the gluing device.

[0095] See also Figure 6 and Figure 7 As shown, based on the glue applying device of embodiment 1, the embodiment of the present application further proposes a battery stringing method, which includes:

[0096] At least two battery cells 100 and at least one set of welding ribbons 101 are connected in series according to the battery string formation rules to form a battery string. The front end of each set of welding ribbons 101 is located on the upper surface of the preceding battery cell 100, and the rear end of each set of welding ribbons 101 is located on the lower surface of the following battery cell 100. The edges of two adjacent battery cells 100 overlap.

[0097] Glue is applied between two adjacent battery cells 100 at the overlapping portion.

[0098] The present application provides a method for stringing battery strings by applying glue to each overlapping portion of the battery string after stringing, so that when a subsequent laminator laminates the battery string, the glue 102 at the overlapping portion is mainly used to bear force together with the welding ribbon 101, which is less likely to cause the overlapping portion of the battery string to crack, thereby greatly improving the yield rate of battery string processing; at the same time, the glue 102 at the overlapping portion also plays a certain connecting role for the two adjacent battery cells 100, which is beneficial to improving the reliability of the series connection of the battery cells 100.

[0099] As an embodiment, applying glue between two adjacent battery cells 100 at an overlapping portion includes:

[0100] Glue is applied to a preset position on the edge of the lower battery cell 100 of the two adjacent battery cells 100 .

[0101] Blow the glue 102 on the lower battery cell 100 into the space between the two adjacent battery cells 100 at the overlapping portion ( Figure 6 The solid arrow in the middle that is tilted downward and to the left indicates the blowing direction).

[0102] By first applying glue to the edge of the lower battery cell 100 of the two adjacent battery cells 100; and then blowing the glue 102 into the space between the two adjacent battery cells 100 at the overlapping portion, glue is applied between the two adjacent battery cells 100 at the overlapping portion, providing a simple process, easy to control and low-cost glue application method.

[0103] In one embodiment, the glue 102 is UV glue, and the battery stringing method further includes:

[0104] The glue 102 at the overlapping portion is cured using a UV lamp.

[0105] By selecting UV glue (ultraviolet glue) and using a UV lamp (ultraviolet lamp) to cure the glue 102 at the overlapping parts, a method of using ultraviolet light to cure the glue is provided. Because the battery strings cannot be heated after being connected, thermosetting glue cannot be used. Selecting UV glue and curing the glue 102 with a UV lamp will not affect the battery strings.

[0106] See also Figure 7 As shown in FIG. 1 , as an embodiment, applying glue to a preset position on the edge of the lower battery cell 100 of two adjacent battery cells 100 includes: Figure 8 As shown, at least two glue spots 1020 are applied at intervals along the length direction of the edge of the lower battery cell 100 to form at least two glue spots 1020 spaced along the length direction of the overlapping portion at the overlapping portion, and each solder strip 101 in each group of solder strips 101 is located between two adjacent glue spots 1020.

[0107] By applying at least two glue dots 1020 at intervals along the length direction of the edge of the lower battery cell 100 , a method for applying glue to the edge of the lower battery cell 100 that is easy to implement and low in cost is provided.

[0108] As an embodiment, applying glue to a preset position on the edge of the lower battery cell 100 of two adjacent battery cells 100 includes: Figure 9As shown, at least two sections of adhesive strips 1021 are applied at intervals along the length direction of the edge of the lower battery cell 100 to form at least two sections of adhesive strips 1021 spaced along the length direction of the overlapping portion at the overlapping portion, and each welding strip 101 in each group of welding strips 101 is located between two adjacent sections of adhesive strips 1021.

[0109] By applying at least two sections of glue strips 1021 at intervals along the length direction of the edge of the lower battery cell 100, another method of applying glue to the edge of the lower battery cell 100 is provided. Compared with the glue points 1020, the glue strips 1021 applied by this gluing method can increase the contact area between the glue 102 and the overlapping parts of the two adjacent battery cells 100, and better share the downward pressure of the laminator on the overlapping parts when laminating the battery string, further reducing the risk of cracking of the overlapping parts of the battery string during lamination.

[0110] As an embodiment, applying glue to a preset position on the edge of the lower battery cell 100 of two adjacent battery cells 100 includes: Figure 10 As shown, an adhesive tape 1022 is applied along the length direction of the edge of the lower battery cell 100 to form an adhesive tape 1022 extending along the length direction of the overlapping portion at the overlapping portion, and each welding ribbon 101 in each group of welding ribbons 101 passes through the adhesive tape 1022.

[0111] By applying a tape 1022 along the length direction of the edge of the lower battery cell 100, another method of applying glue to the edge of the lower battery cell 100 is provided. This gluing method can form a continuous tape 1022 between the overlapping parts of two adjacent battery cells 100. Compared with the applied adhesive strip 1021, it can better share the downward pressure of the laminator on the overlapping parts when laminating the battery string, greatly reducing the risk of cracking of the overlapping parts of the battery string during lamination; at the same time, each welding ribbon 101 is arranged through the tape 1022, which can connect and position the welding ribbon 101, thereby improving the stability and reliability of the connection of the welding ribbon 101 between the two adjacent battery cells 100.

[0112] The battery stringing method proposed in the embodiment of the present application has the following advantages:

[0113] 1) Glue 102 is applied between each overlapping portion of the battery string, so that when the subsequent laminator laminates the battery string, the force is mainly applied by the glue 102 at the overlapping portion together with the solder ribbon 101, which is less likely to cause the overlapping portion of the battery string to crack, thereby greatly improving the yield rate of the battery string processing;

[0114] 2) The glue 102 at the overlapping portion also plays a certain role in connecting the two adjacent battery cells 100, which is beneficial to improving the reliability of the battery cell series connection;

[0115] 3) The method of first stringing the cells and then applying glue to a preset position on the edge of the lower cell 100 of the two adjacent cells 100 and blowing the glue 102 into the overlapping area between the two adjacent cells 100 by blowing air is easy to implement and has an ingenious design.

[0116] 4) The glue is UV glue, which is cured by UV lamp and will not affect the battery string;

[0117] 5) Depending on different process requirements, glue dots 1020, glue strips 1021 or a piece of adhesive tape 1022 may be formed at intervals at the overlapping portion.

[0118] Example 2

[0119] See also Figure 11 and Figure 15 As shown, an embodiment of the present application proposes a gluing device for applying glue to a battery cell 100, and the gluing device includes a second conveying mechanism 22 and a second gluing mechanism 33, wherein: a second gluing station 44 is provided on the conveying path of the second conveying mechanism 22, and the second conveying mechanism 22 is configured to convey the battery cell 100 to the second gluing station 44; the second gluing mechanism 33 is provided at the second gluing station 44, and the second gluing mechanism 33 is configured to apply glue to one edge of the battery cell 100 passing through the second gluing station 44.

[0120] Specifically, the second conveying mechanism 22 has the same structure and conveying method as the first conveying mechanism 20. The difference lies in the different conveying objects. The first conveying mechanism 20 is used to convey battery strings, and the second conveying mechanism 22 is used to convey battery cells 100. Therefore, the structure of the second conveying mechanism 22 will not be repeated here.

[0121] Specifically, the difference between the second gluing mechanism 33 and the first gluing mechanism 30 of Example 1 is that, since this embodiment adopts the method of first applying glue at one edge of the battery cell 100, that is, directly applying the glue 102 at the corresponding position, there is no need to set up the blowing component 32; therefore, the second gluing mechanism 33 of this embodiment can adopt the same structure as the first gluing component 31 of Example 1, so the specific structure of the second gluing mechanism 33 of this embodiment will not be repeated here.

[0122] Through the cooperation of the second conveying mechanism 22 and the second gluing mechanism 33, the battery cell 100 is automatically conveyed to the second gluing station 44 and glue is applied to one edge of the battery cell 100 passing through the second gluing station 44. The gluing method is simple and the gluing efficiency is high. When the battery cell 100 after gluing is subsequently connected in series, there is glue 102 between the overlapping parts of the two adjacent battery cells of the battery string. When the laminator laminates the battery string, the glue 102 at the overlapping parts is mainly used to bear the force together with the welding ribbon 101, which is not easy to cause the overlapping parts of the battery string to crack, thereby greatly improving the yield rate of the battery string processing. Moreover, the glue 102 at the overlapping parts also plays a certain connecting role for the two adjacent battery cells 100, which is beneficial to improving the reliability of the series connection of the battery cells 100.

[0123] As an embodiment, the gluing device also includes a second detection mechanism (not shown in the figure), and a second detection station is also provided on the conveying path of the second conveying mechanism. The second detection station is arranged at the rear of the second gluing station 44. The second conveying mechanism 22 is also configured to convey the battery cell 100 to the second detection station. The second detection mechanism is arranged at the second detection station. The second detection mechanism is configured to perform photographic detection on the glue at the edge of the battery cell 100 passing through the second detection station.

[0124] By providing the second detection mechanism, the glue 102 at the edge of the battery cell 100 can be photographed and detected to ensure the glue application quality of the glue application device.

[0125] As an embodiment, the gluing device also includes a third detection mechanism (illustrated in the figure), and a third detection station is also provided on the conveying path of the second conveying mechanism 22. The third detection station is arranged in front of the second gluing station 44. The second conveying mechanism 22 is also configured to convey the battery cell 100 to the third detection station. The third detection mechanism is arranged at the third detection station. The third detection mechanism is configured to take pictures and position the battery cell 100 passing through the third detection station. The second gluing mechanism 33 applies glue to one edge of the battery cell 100 according to the measured position of the battery cell 100.

[0126] By setting up the third detection mechanism, the battery cell 100 passing through the third detection station can be photographed and positioned. The second glue applying mechanism 33 applies glue to one edge of the battery cell 100 according to the measured position of the battery cell 100, thereby improving the glue applying accuracy of the glue applying device.

[0127] It should be noted that the glue 102 in this embodiment is a thermosetting glue. The thermosetting glue can be cured together with the battery cell 100 and the soldering ribbon 101 using an infrared light box. Therefore, in this embodiment, there is no need to set up a special glue curing mechanism. When the battery cell and the soldering ribbon are connected in series, the glue at the overlapping parts of the battery string is cured at the same time, which simplifies the overall structure of the glue application device and reduces the cost.

[0128] Of course, in this embodiment, after the battery cell 100 and the solder ribbon 101 are stacked together and before the battery cell 100 and the solder ribbon 101 are connected in series, a second curing mechanism (not shown in the figure) can be used to cure the glue on the battery cell 100 separately. The glue 102 is a thermosetting glue or a UV glue. Correspondingly, the second curing mechanism is an infrared light box for curing thermosetting glue, or the second curing mechanism is a UV lamp for curing UV glue.

[0129] The specific working process of the glue applying device proposed in this embodiment is as follows:

[0130] The second conveying mechanism 22 receives the battery cell 100 to be glued;

[0131] The second conveying mechanism 22 conveys the battery cell 100 in a stepwise manner through the third inspection station. The third inspection mechanism takes photos and positions the battery cell 100 passing through the third inspection station to obtain position information of the battery cell 100.

[0132] The second conveying mechanism 22 conveys the battery cell 100 in a step-by-step manner through the second gluing station 44 , and the second gluing mechanism 33 applies glue to one edge of the battery cell 100 on the second gluing station 44 according to the measured position of the battery cell 100 ;

[0133] The second conveying mechanism 22 conveys the glue-applied battery cell 100 in a stepwise manner through the second inspection station. The second inspection mechanism takes photos of the glue on the edge of the battery cell 100 passing the second inspection station to detect whether the quantity and position of the glue 102 on the battery cell 100 meet the standards. If the inspection result does not meet the standards, the battery cell 100 is rejected.

[0134] The second conveying mechanism 22 conveys the qualified battery cells 100 that have passed the second inspection station to the next process.

[0135] The glue applying device proposed in this embodiment has the following advantages:

[0136] 1) Automatic glue application is achieved at one edge of the battery cell 100, which facilitates glue application and has high glue application efficiency;

[0137] 2) The curing of the cell 100 after the glue is applied can be carried out simultaneously with the connection of the cell 100 and the solder ribbon 101, without the need for a separate curing mechanism, thus simplifying the overall structure and reducing costs;

[0138] 3) Before gluing, the battery cell 100 is photographed and positioned by a detection mechanism, thereby improving the gluing accuracy of the gluing device.

[0139] Based on the glue applying device of the second embodiment, another method for stringing batteries is proposed in the embodiment of the present application. The method for stringing batteries proposed in the embodiment of the present application includes:

[0140] Applying glue to one edge of the battery cell 100;

[0141] At least two battery cells 100 and at least one set of welding ribbons 101 are stacked according to the stacking rules of the battery string. The front section of each set of welding ribbons 101 is located on the upper surface of the preceding battery cell 100, and the rear section of each set of welding ribbons 101 is located on the lower surface of the following battery cell 100. The edges of two adjacent battery cells 100 overlap, and the glue 102 is located between the two adjacent battery cells 100 at the overlapping portion.

[0142] The stacked battery strings are connected in series to form a battery string.

[0143] It can be seen that by first applying glue at one edge of the battery cell 100 and then assembling and connecting the battery cells 100 after gluing, there is glue 102 between the overlapping parts of the two adjacent battery cells 100 of the battery string after connection. When the subsequent laminator laminates the battery string, the glue 102 at the overlapping part is mainly used to bear the force together with the welding ribbon 101, which is not easy to cause the overlapping part of the battery string to crack, greatly improving the yield rate of the battery string processing. At the same time, the gluing process is simple, easy to implement and low in cost. Moreover, the glue 102 at the overlapping part also plays a certain connecting role for the two adjacent battery cells 100, which is beneficial to improving the reliability of the battery cell series connection.

[0144] As an embodiment, after stacking at least two battery cells 100 and at least one group of welding strips 101 according to the stacking rules of the battery string, and before connecting the stacked battery strings in series to form a battery string, the battery string forming method further includes: curing the glue 102 at the overlapping parts of the battery string.

[0145] Specifically, the glue 102 can be either thermosetting glue or UV glue.

[0146] A method for separately curing glue at overlapping parts before stacked battery strings are connected in series to form a battery string is provided, which facilitates controlling the curing process.

[0147] As an embodiment, the stacked battery strings are connected in series to form a battery string, including: connecting the battery cells 100 and the welding ribbons 101 in series, and curing the glue 102 at the overlapping parts of the battery string.

[0148] The glue 102 in this embodiment is a thermosetting glue.

[0149] The thermosetting adhesive can be cured together with the battery cell 100 and the soldering ribbon 101 by using an infrared light box when they are connected in series, providing a method for connecting the battery cell 100 and the soldering ribbon 101 in series while curing the adhesive 102 at the overlapping parts of the battery string, thereby simplifying the battery stringing method and improving the battery stringing efficiency.

[0150] As an embodiment, the battery stringing method further includes:

[0151] Before stacking the battery cell 100 and the solder strip 101, the glue at the edge of the battery cell 100 is photographed and tested to check whether the quantity and position of the glue 102 on the battery cell 100 meet the standards. If the test result does not meet the standards, the battery cell 100 is removed for processing.

[0152] By taking photos and inspecting the glue 102 at the edge of the battery cell 100 before stacking the battery cell 100 and the solder ribbon 101 , the quality of the glue application on the battery cell 100 is ensured.

[0153] See also Figure 15 As shown, as an embodiment, applying glue to one edge of the battery cell 100 includes: Figure 12 As shown, at least two glue spots 1020 are applied at intervals along the length direction of an edge of the battery cell 100 to form at least two glue spots 1020 spaced along the length direction of the overlapping portion at the overlapping portion, and each solder strip 101 in each group of solder strips 101 is located between two adjacent glue spots 1020.

[0154] By applying at least two glue dots 1020 spaced apart along the length direction of one edge of the battery cell 100 , a method for applying glue to one edge of the battery cell 100 that is easy to implement and low in cost is provided.

[0155] As an embodiment, applying glue to one edge of the battery cell 100 includes: Figure 13 As shown, at least two sections of adhesive strips 1021 are applied at intervals along the length direction of one edge of the battery cell 100 to form at least two sections of adhesive strips 1021 spaced along the length direction of the overlapping portion at the overlapping portion, and each welding strip 101 in each group of welding strips 101 is located between two adjacent sections of adhesive strips 1021.

[0156] By applying at least two sections of glue strips 1021 at intervals along the length direction of an edge of the battery cell 100, another method of applying glue to the edge of the battery cell 100 is provided. Compared with the glue points 1020, the glue strips 1021 applied by this gluing method can increase the contact area between the glue 102 and the overlapping parts of the two adjacent battery cells 100, and better share the downward pressure of the laminator on the overlapping parts when laminating the battery string, further reducing the risk of cracking of the overlapping parts of the battery string during lamination.

[0157] As an embodiment, applying glue to one edge of the battery cell 100 includes: Figure 14As shown, an adhesive tape 1022 is applied along the length direction of one edge of the battery cell 100 to form an adhesive tape 1022 extending along the length direction of the overlapping portion at the overlapping portion, and each welding ribbon 101 in each group of welding ribbons 101 passes through the adhesive tape 1022 .

[0158] By applying an adhesive tape 1022 along the length direction of one edge of the battery cell 100, another method of applying glue to the edge of the battery cell 100 is provided. This gluing method can form a continuous adhesive tape 1022 between the overlapping parts of two adjacent battery cells 100. Compared with the applied adhesive strip, it can better share the downward pressure of the laminator on the overlapping parts when laminating the battery string, greatly reducing the risk of cracking of the overlapping parts of the battery string during lamination; at the same time, each welding ribbon 101 is arranged through the adhesive tape 1022, which can connect and position the welding ribbon 101, thereby improving the stability and reliability of the connection of the welding ribbon 101 between the two adjacent battery cells 100.

[0159] The battery stringing method proposed in the embodiment of the present application has the following advantages:

[0160] 1) Glue 102 is applied between each overlapping portion of the battery string, so that when the subsequent laminator laminates the battery string, the force is mainly applied by the glue 102 at the overlapping portion together with the solder ribbon 101, which is less likely to cause the overlapping portion of the battery string to crack, thereby greatly improving the yield rate of the battery string processing;

[0161] 2) The glue 102 at the overlapping portion also plays a certain role in connecting the two adjacent battery cells 100, which is beneficial to improving the reliability of the battery cell series connection;

[0162] 3) The method of first applying glue to the battery cell 100 and then stringing the glued battery cell 100 and the solder ribbon 101 can simplify the glue application process, make it easy to implement, and reduce costs;

[0163] 4) Depending on the process requirements, the glue 102 can be cured separately or simultaneously when the cell 100 and the solder ribbon 101 are connected in series;

[0164] 5) Depending on different process requirements, glue dots 1020, glue strips 1021 or a piece of adhesive tape 1022 may be formed at intervals at the overlapping portion.

[0165] The above embodiments merely illustrate the basic principles and features of the present application. The present application is not limited by the above examples. Various changes and modifications may be made to the present application without departing from the spirit and scope of the present application. Such changes and modifications are intended to fall within the scope of the present application. The scope of protection claimed in the present application is defined by the appended claims and their equivalents.

Claims

1. A glue applying device, characterized in that: The glue applying device is used to apply glue to a battery string, wherein the battery string includes at least two battery cells connected in series according to a stringing rule and at least one set of welding ribbons, wherein the front section of each set of welding ribbons is located on the upper surface of the preceding battery cell, and the rear section of each set of welding ribbons is located on the lower surface of the following battery cell, and the edges of two adjacent battery cells overlap each other. The glue applying device includes a first conveying mechanism and a first glue applying mechanism, wherein: A first gluing station is provided on the conveying path of the first conveying mechanism, and the first conveying mechanism is configured to convey the stacked or serially connected battery strings to the first gluing station; The first glue applying mechanism is disposed at the first glue applying station, and is configured to apply glue to each overlapping portion of the battery string passing through the first glue applying station.

2. The glue applying device according to claim 1, characterized in that: The first gluing mechanism includes a first gluing component and an air blowing component, wherein: A blowing station is further provided on the conveying path of the first conveying mechanism, the blowing station is arranged after the first gluing station, the first gluing assembly is arranged at the first gluing station, the blowing assembly is arranged at the blowing station, and the first conveying mechanism is further configured to convey the battery string to the blowing station; The first glue applying assembly is configured to apply glue to a preset position on the edge of the lower battery cell of the two adjacent battery cells at the first glue applying station; The blowing assembly is configured to blow air to the glue on the edge of the lower battery cell of the two adjacent battery cells on the blowing station, so as to blow the glue on the edge of the lower battery cell into the overlapping parts.

3. The glue applying device according to claim 2, characterized in that: The first glue application assembly includes a base, a mounting frame, a UVW platform, a lifting drive mechanism, a translation drive mechanism, a screen module and a scraper module, wherein: The mounting frame is escalably mounted on the base, a fixed end of the elevating drive mechanism is mounted on the base, a driving end of the elevating drive mechanism is connected to the mounting frame, and the elevating drive mechanism is configured to drive the mounting frame to elevate; The UVW platform is mounted on the mounting frame, the screen module is mounted on the bottom of the UVW platform, the scraper module is mounted on the mounting frame in a translationally movable manner, and the scraper module abuts against the upper side of the screen module from above; The fixed end of the translation drive mechanism is mounted on the mounting frame, and the driving end of the translation drive mechanism is connected to the scraper module; The lifting drive mechanism drives the mounting frame to descend, thereby driving the screen module to descend to a preset glue dispensing position. The translation drive mechanism drives the scraper module to translate, thereby scraping the glue on the screen frame of the screen module out of the mesh holes. The glue overflowing from the mesh holes is applied to a preset position on the edge of the lower battery cell of the two adjacent battery cells at the first gluing station.

4. The glue applying device according to claim 2, characterized in that: The blowing assembly is arranged above the blowing station, and the blowing assembly includes an air supply component and an air path. The air supply component is configured to supply high-pressure gas into the air path, and the high-pressure gas is blown out obliquely downward through the air flow output port of the air path to blow the glue on the edge of the battery cell located below into between the overlapping parts.

5. The glue applying device according to claim 2, characterized in that: The glue-applying device also includes a first curing mechanism, and a first curing station is also provided on the conveying path of the first conveying mechanism. The first curing station is arranged after the blowing station. The first conveying mechanism is also configured to convey the battery string to the first curing station. The first curing mechanism is arranged in the first curing station. The first curing mechanism is configured to cure the glue of each overlapping part of the battery string passing through the first curing station.

6. The glue applying device according to claim 5, characterized in that: The glue is UV glue, and the first curing mechanism includes a bracket and a UV light box arranged on the bracket, and the UV light box is arranged above the first curing station.

7. The glue applying device according to claim 1, characterized in that: The gluing device also includes a first detection mechanism, and a first detection station is also provided on the conveying path of the first conveying mechanism. The first detection station is arranged in front of the first gluing station. The first conveying mechanism is also configured to convey the battery string after stringing to the first detection station. The first detection mechanism is arranged at the first detection station. The first detection mechanism is configured to take pictures and locate the battery string after stringing that passes through the first detection station. The first gluing mechanism applies glue to the overlapping part according to the measured battery string position.

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