Battery string welding equipment and welding method

Abstract

The present application discloses a battery string welding device and a welding method, wherein the battery string welding device comprises a first infrared welding part and a second infrared welding part which are arranged on a conveying mechanism at intervals, a presser recovery channel is located above the conveying mechanism, the first infrared welding part can weld the battery string to be welded passing through the first station to form a first welding part, and the second infrared welding part can weld the first welding part passing through the second station to form a second welding part, when the pressing mechanism is arranged on the conveying mechanism or the second infrared welding part, the presser carrier carries the presser to the presser recovery channel, and the pressing mechanism presses the second welding part. The above technical solution can solve the problem that when the photovoltaic modules produced by the battery strings in the related technology are subjected to EL detection after lamination, multiple shadows are easily detected, thereby causing the module power to attenuate or fail.

Description

Technical Field

[0001] The present invention relates to the technical field of battery string preparation, and in particular to a battery string welding device and a welding method. Background Art

[0002] When preparing the film-coated battery string, the battery cells and the film in the battery string to be welded absorb the full-wavelength infrared light emitted by the infrared lamp welding head, so that the films on the opposite sides of the battery cells are heated and melted, and the welding tape is attached to the front and back sides of the battery cells through the film to fix the welding tape relative to the battery cells. Among them, if the infrared welding time of the infrared lamp welding head on the battery string to be welded is too long, the film is likely to stick to the conveyor belt, making it difficult to peel the battery string from the conveyor belt. Forced peeling will cause the film and the battery cell to fall off in local areas, and also cause part of the welding tape to separate from the battery cell. On the contrary, if the infrared welding time is too short, the film and the battery cell are likely to not be completely attached, resulting in loose adhesion, which makes it difficult to control the infrared welding time. When the battery strings produced by the above two situations are made into photovoltaic modules and undergo EL testing after the lamination process, the photovoltaic modules are likely to detect multiple shadows, that is, the power of the photovoltaic modules is attenuated or even failed, and the qualified rate of the photovoltaic modules is reduced. Summary of the invention

[0003] The object of the present invention is to provide a battery string welding device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a battery string welding device, used to arrange multiple battery cells, multiple welding ribbon groups, multiple adhesive films and multiple presses in a battery string to be welded in a preset arrangement, and weld them to form a battery string, including a conveying mechanism, a first infrared welding component, a second infrared welding component, a pressing mechanism, a press transporter and a press recovery channel, the conveying mechanism can convey the battery string to be welded through a first station and a second station in sequence, the first infrared welding component and the second infrared welding component are arranged on the conveying mechanism at intervals, the press recovery channel is located above the conveying mechanism, the first infrared welding component is used to infrared weld at least part of the battery string to be welded passing through the first station The first welding part is formed by infrared welding of at least part of the first welding part passing through the second workstation, and the second infrared welding part is used to form a second welding part by infrared welding. The pressing mechanism is arranged on the conveying mechanism or on the second infrared welding part. When the pressing mechanism is arranged on the conveying mechanism, the presser carrier transports the press in the second welding part to the presser recovery channel, and the pressing mechanism presses the second welding part. When the pressing mechanism is arranged on the second infrared welding part, the presser carrier transports the press in the first welding part to the presser recovery channel, and the pressing mechanism presses the second welding part.

[0005] Preferably, it also includes a cooling member, which is arranged on the conveying mechanism and is used to cool the second welding part after being pressed by the pressing mechanism.

[0006] Preferably, in the case where the pressing mechanism is arranged on the conveying mechanism, it also includes a third infrared welding component, the pressing mechanism includes a lifting drive component, a light-transmitting press and a film pressing component, the lifting drive component is arranged on the conveying mechanism, the light-transmitting press and the film pressing component are floatingly connected with the driving end of the lifting drive component in sequence along the conveying direction of the conveying mechanism, the pressing surface of the light-transmitting press and the pressing surface of the film pressing component are coplanar, the third infrared welding component is arranged on the light-transmitting press and is opposite to the pressing surface of the light-transmitting press, the third infrared welding component is used for infrared welding of at least part of the second welding part, wherein the third infrared welding component is an LED infrared welding head.

[0007] Preferably, a heat-insulating member is provided between the first infrared welding member and the second infrared welding member, and the heat-insulating member is used for heat-insulating the first welding portion between the first station and the second station.

[0008] Preferably, the first infrared welding component is an infrared lamp welding head, the second infrared welding component is an infrared LED welding head, or both the first infrared welding component and the second infrared welding component are infrared LED welding heads.

[0009] The present application also discloses a welding method, which is applicable to the above-mentioned battery string welding device, comprising:

[0010] The conveying mechanism drives the battery string to be welded to move a preset distance in a preset time step;

[0011] At least part of the battery string to be welded is moved to the first station, and the first infrared welding member infrared welds at least part of the battery string to be welded at a first preset temperature to form the first welding part;

[0012] The first welding part moves to the second station, and the second infrared welding part infrared welds at least part of the first welding part at a second preset temperature to form the second welding part, wherein the first preset temperature is less than or equal to the second preset temperature;

[0013] In the case where the pressing mechanism is arranged on the conveying mechanism, the press tool carrier transports the press tool in the second welding part to the press tool recovery channel, the second welding part is moved to the third workstation, and the pressing mechanism presses the second welding part; in the case where the pressing mechanism is arranged on the second infrared welding part, the press tool carrier transports the press tool in the first welding part to the press tool recovery channel, and the pressing mechanism presses the second welding part.

[0014] Preferably, it also includes: the second welding part moves to a fourth station, and a cooling member cools the second welding part, wherein the first station, the second station, the third station and the fourth station are arranged in sequence along the first direction.

[0015] Preferably, after at least part of the battery string to be welded is moved to the first station, and the first infrared welding member infrared welds at least part of the battery string to be welded at a first preset temperature to form the first welding part, the method further includes:

[0016] The heat-insulating member performs heat-insulating treatment on the first welding portion located between the first station and the second station.

[0017] Preferably, in the case where the pressing mechanism is disposed on the conveying mechanism, the press tool carrier carries the press tool in the second welding part to the press tool recovery channel, and the second welding part moves to the third station, and the step of the pressing mechanism pressing the second welding part includes:

[0018] When the second welding part passes through the third station, the third infrared welding part infrared welds at least part of the second welding part to form a third welding part, and the lifting drive drives the transparent press and the film pressing tool to move and flexibly press the third welding part.

[0019] The technical solution adopted in this application can achieve the following beneficial effects:

[0020] On the one hand, in a battery string welding device disclosed in the present application, a conveying mechanism can convey the battery string to be welded through a first station and a second station in sequence, a first infrared welding part and a second infrared welding part are arranged on the conveying mechanism, and a pressing mechanism is arranged on the conveying mechanism or on the second infrared welding part. The first infrared welding part is used to weld at least part of the battery string to be welded passing through the first station to form a first welding part, the second infrared welding part is used to weld the first welding part passing through the second station, and the pressing mechanism is used to press the first welding part after the second infrared welding part is welded.

[0021] During the use of the battery string welding equipment, the conveying mechanism conveys the battery string to be welded through the first station and the second station in sequence, wherein, when at least part of the battery string to be welded passes through the first station, the first infrared welding component welds it and forms a first welding part, wherein the first infrared welding component can heat the battery cells in at least part of the battery string to be welded, so that the adhesive films on both sides of the battery cells are heated and adhered, and the first infrared welding component only partially adheres the adhesive film corresponding to the battery cell, thereby avoiding the first infrared welding component from welding for too long and at too high a temperature, which causes the two sides of the adhesive film to melt, and further avoids the adhesive film from sticking to the conveying mechanism and affecting the welding effect; then, when the first welding part passes through the second station, the second infrared welding component welds it, so that the adhesive film melts again, thereby increasing the bonding area between the adhesive film and the battery cell.

[0022] Since the pressing mechanism is arranged on the conveying mechanism or on the second infrared welding part, when the pressing mechanism is arranged on the conveying mechanism, the pressing mechanism presses the first welding part when the first welding part passes through the third station; when the pressing mechanism is arranged on the conveying mechanism, the pressing mechanism presses the first welding part after welding by the second infrared welding part. In both cases, the adhesive film in the first welding part can be completely attached to the battery cell, thereby ensuring that the welding strip is in full contact with the battery cell. This avoids the photovoltaic module being easily detected with multiple shadows when passing the EL test after the lamination process, resulting in the power attenuation or failure of the module, thereby improving the qualified rate of the photovoltaic module.

[0023] On the other hand, the present application also discloses a welding method, which is applicable to the above-mentioned battery string welding device, and the disclosed welding method includes:

[0024] S1, the conveying mechanism drives the battery string to be welded to move a preset distance in a preset time step;

[0025] In this step, the preset time is the time obtained by the experimenters after multiple experimental tests to avoid the adhesion of the adhesive film in at least part of the battery string to be welded with the corresponding press and / or conveying mechanism during infrared welding, and the preset distance refers to the width distance of at least one battery cell.

[0026] S2, at least part of the battery string to be welded is moved to a first workstation, and a first infrared welding member welds at least part of the battery string to be welded at a first preset temperature to form a first welding part;

[0027] In this step, the first infrared welding part infrared welds at least a portion of the battery string to be welded at a first preset temperature to form a first welding portion, so that the adhesive film in at least a portion of the battery string to be welded is not completely adhered to the battery cell, thereby achieving fixation of the adhesive film relative to the battery cell, partial fixation of the welding strip relative to the battery cell, and avoiding adhesion of the adhesive film to the conveying mechanism.

[0028] S3, the first welding part is moved to the second station, and the second infrared welding part infrared welds at least part of the first welding part at a second preset temperature to form a second welding part, wherein the first preset temperature is less than or equal to the second preset temperature;

[0029] In this step, the second infrared welding part welds at least part of the first welding part at a second preset temperature to form a second welding part, so that the adhesive film in at least part of the first welding part and the battery cell are melted and bonded again through the secondary infrared welding, thereby increasing the bonding area.

[0030] S4. When the pressing mechanism is arranged on the conveying mechanism, the press tool carrier transports the press tool in the second welding part to the press tool recovery channel, the second welding part is moved to the third station, and the pressing mechanism presses the second welding part; when the pressing mechanism is arranged on the second infrared welding part, the press tool carrier transports the press tool in the first welding part to the press tool recovery channel, and the pressing mechanism presses the second welding part.

[0031] In this step, when the pressing mechanism is arranged on the conveying mechanism, the press tool carrier and the press tool recovery channel cooperate to recover the press tool in the first welding part, which is beneficial to increase the irradiation area of ​​the second infrared welding part to the battery cell and the adhesive film in the first welding part, so that the melting area of ​​the adhesive film is further increased, and the pressing mechanism presses the second welding part to make the adhesive film and the battery cell firmly adhered; when the pressing mechanism is arranged on the conveying mechanism, the press tool carrier transports the press tool in the second welding part to the press tool recovery channel, and the pressing mechanism presses the second welding part, and discharges the bulge between the adhesive film and the battery cell in the second welding part by pressing again. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of a battery string welding device according to a solution disclosed in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of a battery string welding device according to another embodiment of the present application;

[0035] Figure 3 It is a schematic structural diagram of the assembly of the third infrared welding component and the pressing mechanism disclosed in the embodiment of the present application;

[0036] Figure 4 It is a front view of the assembly of the third infrared welding component and the pressing mechanism disclosed in the embodiment of the present application.

[0037] In the figure: 100, conveying mechanism; 200, first infrared welding part; 300, second infrared welding part; 400, pressing mechanism; 410, lifting drive part; 420, light-transmitting press; 430, film pressing press; 500, cooling part; 600, third infrared welding part; 710, press handling hand; 720, press recovery channel; 800, insulation part. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0039] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] like Figures 1 to 4 As shown, the present application discloses a battery string welding device, which is used to arrange multiple battery cells, multiple welding ribbon groups and multiple adhesive films in a battery string to be welded in a preset arrangement manner, and weld them to form a battery string. In the existing disclosed technology, multiple battery cells, multiple welding ribbon groups, multiple adhesive films and multiple presses are arranged in a preset arrangement manner to form a battery string to be welded. The press is beneficial to relatively fix the stacked adhesive films, welding ribbons and battery cells before infrared welding, so as to avoid deviation between the welding ribbons and the grid lines on the battery cells, which will not be elaborated here.

[0042] The disclosed battery string welding equipment includes a conveying mechanism 100, a first infrared welding part 200, a second infrared welding part 300, a pressing mechanism 400, a press tool carrier 710 and a press tool recovery channel 720, wherein the conveying mechanism 100 can be a belt stepping channel, a stepping transport fork channel, etc., and this application does not impose any restrictions on this.

[0043] Specifically, the conveying mechanism 100 can convey the battery string to be welded to pass through the first station and the second station in sequence, the first infrared welding member 200 and the second infrared welding member 300 are arranged on the conveying mechanism 100 at intervals, the press recovery channel 720 is located above the conveying mechanism 100, the first infrared welding member 200 is used to infrared weld at least part of the battery string to be welded passing through the first station to form a first welding part, the second infrared welding member 300 is used to infrared weld at least part of the first welding part passing through the second station to form a second welding part, and the pressing mechanism 400 is arranged on the conveying mechanism 100. The pressing mechanism 400 is disposed on or on the second infrared welding part 300, and the pressing mechanism 400 is disposed on the conveying mechanism 100 or on the second infrared welding part 300. When the pressing mechanism 400 is disposed on the conveying mechanism 100, the press tool transporting hand 710 transports the press tool in the first welding part to the press tool recovery channel 720, and the pressing mechanism 400 presses the second welding part; when the pressing mechanism 400 is disposed on the second infrared welding part 300, the press tool transporting hand 710 transports the press tool in the second welding part to the press tool recovery channel 720, and the pressing mechanism 400 presses the second welding part.

[0044] During the use of the battery string welding equipment, the conveying mechanism 100 conveys the battery string to be welded and moves in steps for a preset distance (the preset distance refers to the width distance of at least one battery cell) for a preset time (the preset time is the time obtained by the experimenter after multiple experimental tests to avoid the adhesion of the adhesive film in at least part of the battery string to be welded to the press and / or the conveying mechanism 100 during infrared welding), and passes through the first station and the second station in sequence. When at least part of the battery string to be welded passes through the first station, the first infrared welding component 200 performs infrared welding on it at a first preset temperature and forms a first welding part, wherein the first infrared welding component 200 heats at least part of the battery string to be welded, so that the adhesive film corresponding to at least one battery cell in at least part of the battery string to be welded is partially melted and adhered to the adhesive surface of the battery cell, thereby fixing the adhesive film relative to the battery cell, thereby avoiding the first infrared welding component 200 from having too long a welding time and too high a welding temperature, which causes the two opposite sides of the adhesive film to melt, thereby avoiding the adhesive film from adhering to the corresponding press and / or conveying mechanism 100 and affecting the welding effect.

[0045] Then, when the pressing mechanism 400 is arranged on the second infrared welding member 300, the pressing tool transporting hand 710 and the pressing tool recovery channel 720 cooperate to recover the pressing tool in the first welding part, so as to increase the irradiation area of ​​the second infrared welding member 300 to the battery cell and the adhesive film in the first welding part. When the first welding part passes through the second station, the second infrared welding member 300 performs infrared welding on at least part of the first welding part at the second preset temperature to form a second welding part, so that the melting area of ​​the adhesive film is increased, thereby further increasing the bonding area between the adhesive film and the battery cell, and the pressing mechanism 400 presses the second welding part to make the adhesive film and the battery cell firmly adhered; when the pressing mechanism 400 is arranged on the conveying mechanism 100, the pressing tool transporting hand 710 transports the pressing tool in the second welding part to the pressing tool recovery channel 720, and the pressing mechanism 400 presses the second welding part to discharge the bulge between the adhesive film and the battery cell in the second welding part by actively pressing. Wherein, the second preset temperature is less than or equal to the first preset temperature.

[0046] In the above two cases, the second infrared welding part 300 performs infrared welding on at least part of the first welding part at the second preset temperature to form the second welding part. It can be seen that the infrared welding area of ​​the second infrared welding part 300 is less than or equal to the infrared welding area of ​​the first infrared welding part 200, which can help reduce the repeated welding of some areas of the first welding part when it moves, thereby avoiding the adhesion of the adhesive film facing the conveying mechanism 100 due to melting on both sides. At the same time, the pressing mechanism 400 presses the second welding part after welding and the presser is recycled. Since the adhesive film in the second welding part gradually cools down after leaving the second station, the adhesive film and the pressing mechanism 400 are adhered, so that the pressed adhesive film can be more completely attached to the battery cell, thereby ensuring that the welding strip is fully fixed and in contact with the battery cell. This avoids the photovoltaic module being easily detected with multiple shadows when passing the EL test after the lamination process, resulting in the power attenuation or failure of the module, thereby improving the qualified rate of the photovoltaic module.

[0047] In an embodiment of the present application, the disclosed battery string welding equipment may further include a cooling member 500. Specifically, the cooling member 500 is disposed on the conveying mechanism 100, and the cooling member 500 is used to cool the second welding part after being pressed by the pressing mechanism 400.

[0048] In addition, the cooling element 500 may be a fan, a water cooler, etc., and the present application does not impose any limitation on this.

[0049] In an embodiment of the present application, when the pressing mechanism 400 is arranged on the conveying mechanism 100, the disclosed battery string welding equipment may also include a third infrared welding component 600, and the pressing mechanism 400 may include a lifting drive component 410, a light-transmitting press 420 and a film pressing component 430. Specifically, the lifting drive component 410 is arranged on the conveying mechanism 100, and the light-transmitting press 420 and the film pressing component 430 are floatingly connected with the driving end of the lifting drive component 410 in sequence along the conveying direction of the conveying mechanism 100. The pressing surface of the light-transmitting press 420 and the pressing surface of the film pressing component 430 are coplanar, and the third infrared welding component 600 is arranged on the light-transmitting press 420 and is opposite to the pressing surface of the light-transmitting press 420. The third infrared welding component 600 is used for infrared welding of at least part of the second welding part, wherein the third infrared welding component 600 is an LED infrared welding head.

[0050] The above structure drives the light-transmitting press 420 and the film pressing press 430 to perform lifting and reciprocating movements through the lifting drive 410, and the third infrared welding component 600 can infrared weld at least part of the second welding part to form a third welding part. Since the light-transmitting press 420 and the film pressing press 430 are floatingly connected to the driving end of the lifting drive 410 in sequence along the conveying direction of the conveying mechanism 100, the lifting drive 410 drives the light-transmitting press 420 and the film pressing press 430 to flexibly press the third welding part, thereby avoiding the second welding part being rigidly pressed to cause hidden cracks or fragments of the battery cell.

[0051] It is known from the prior art that the LED lamp welding head emits full-wavelength infrared light through the thermal effect of electric current. The full-wavelength infrared light can be absorbed by both the adhesive film and the battery cell, but most of it is absorbed by the battery cell. The LED infrared welding head is based on the principle of injection electroluminescence and can emit infrared light of a specific wavelength, which can only be absorbed by the battery cell. As a result, the adhesive surface of the adhesive film in the second welding part facing the battery cell is melted first only by absorbing the heat of the battery cell, thereby preventing the side of the adhesive film facing the light-transmitting press 420 and the film pressing press 430 from sticking to the light-transmitting press 420 and the film pressing press 430. Through three weldings, the adhesive film can further increase the bonding area with the battery cell.

[0052] In addition, the lifting drive member 410 can be a telescopic cylinder, a telescopic electric cylinder, etc., and this application does not impose any limitation on this.

[0053] In the embodiment of the present application, a heat preservation component 800 is provided between the first infrared welding component 200 and the second infrared welding component 300. The heat preservation component 800 is used to perform heat preservation treatment on the first welding part located between the first workstation and the second workstation, so that when the first welding part transitions between the first workstation and the second workstation, the first welding part will not experience a large range of temperature drop, which is beneficial to ensure the infrared welding effect of the second infrared welding component 300 on the first welding part.

[0054] In addition, the thermal insulation component 800 may be a thermal insulation cover, a hot air blower, etc., and this application does not impose any limitation on this.

[0055] In the embodiment of the present application, the first infrared welding component 200 may be an infrared lamp welding head, and the second infrared welding component 300 may be an infrared LED welding head, or the first infrared welding component 200 and the second infrared welding component 300 may both be infrared LED welding heads.

[0056] The above structure can effectively reduce the number of times that the side of the adhesive film away from the battery cell absorbs the infrared light emitted by the first infrared welding component 200 or the second infrared welding component 300, thereby avoiding adhesion between the press, the transparent press 420 and the film pressing press 430 and the side of the adhesive film away from the battery cell.

[0057] The present application also discloses a welding method, which is applicable to the above-mentioned battery string welding device. The disclosed welding method includes:

[0058] S1, the conveying mechanism 100 drives the battery string to be welded to move a preset distance in a preset time step;

[0059] In this step, the preset time is the time obtained by the experimenters after multiple experimental tests to avoid the adhesion of the adhesive film in at least part of the battery string to be welded with the corresponding press and / or conveying mechanism 100 during infrared welding, and the preset distance refers to the width distance of at least one battery cell.

[0060] S2, at least part of the battery string to be welded is moved to the first station, and the first infrared welding member 200 welds at least part of the battery string to be welded at a first preset temperature to form a first welding part;

[0061] In this step, the first infrared welding part 200 infrared welds at least a portion of the battery string to be welded at a first preset temperature to form a first welding portion, so that the adhesive film in at least a portion of the battery string to be welded is not completely adhered to the battery cell, thereby achieving fixation of the adhesive film relative to the battery cell, partial fixation of the welding strip relative to the battery cell, and avoiding adhesion of the adhesive film to the conveying mechanism 100.

[0062] S3, the first welding part moves to the second station, and the second infrared welding member 300 infrared welds at least part of the first welding part at a second preset temperature to form a second welding part, wherein the first preset temperature is less than or equal to the second preset temperature;

[0063] In this step, the second infrared welding part 300 welds at least part of the first welding part at a second preset temperature to form a second welding part, so that the adhesive film in at least part of the first welding part and the battery cell are melted and bonded again through the secondary infrared welding, thereby increasing the bonding area.

[0064] S4. When the pressing mechanism 400 is arranged on the conveying mechanism 100, the press tool transporting hand 710 transports the press tool in the second welding part to the press tool recovery channel 720, the second welding part is moved to the third station, and the pressing mechanism 400 presses the second welding part; when the pressing mechanism 400 is arranged on the second infrared welding part 300, the press tool transporting hand 710 transports the press tool in the first welding part to the press tool recovery channel 720, and the pressing mechanism 400 presses the second welding part.

[0065] In this step, when the pressing mechanism 400 is arranged on the conveying mechanism 100, the press tool conveying hand 710 and the press tool recovery channel 720 cooperate to recover the press tool in the first welding part, which is beneficial to increase the irradiation area of ​​the second infrared welding part 300 to the battery cell and the adhesive film in the first welding part, so that the melting area of ​​the adhesive film is further increased, and the pressing mechanism 400 presses the second welding part to make the adhesive film and the battery cell firmly adhere; when the pressing mechanism 400 is arranged on the conveying mechanism 100, the press tool conveying hand 710 conveys the press tool in the second welding part to the press tool recovery channel 720, and the pressing mechanism 400 presses the second welding part to discharge the bulge between the adhesive film and the battery cell in the second welding part by pressing again.

[0066] In the embodiment of the present application, the disclosed welding method may further include:

[0067] S5. The second welding part moves to the fourth station, and the cooling member 500 cools the second welding part, wherein the first station, the second station, the third station and the fourth station are sequentially arranged at intervals along the first direction.

[0068] In this step, the cooling member 500 cools the second welding portion, thereby reducing the viscosity of the adhesive film in the second welding portion, thereby further preventing the battery string from being adhered to the conveying mechanism 100 .

[0069] In the embodiment of the present application, after at least part of the battery string to be welded is moved to the first station, and the first infrared welding member 200 infrared welds at least part of the battery string to be welded at a first preset temperature to form a first welding part, the following steps may also be included:

[0070] S21, the heat preservation member 800 performs heat preservation treatment on the first welding part between the first station and the second station;

[0071] In this step, when the first welding part transitions between the first station and the second station, the thermal insulation component 800 can prevent the first welding part from experiencing a large range of temperature drop, thereby helping to ensure the infrared welding effect of the second infrared welding component 300 on the first welding part.

[0072] In the embodiment of the present application, when the pressing mechanism 400 is provided on the conveying mechanism 100, the press tool transporting hand 710 transports the press tool in the second welding part to the press tool recovery channel 720, and the second welding part moves to the third station. The step of the pressing mechanism 400 pressing the second welding part includes:

[0073] S41. When the second welding part passes through the third workstation, the third infrared welding part 600 infrared welds at least part of the second welding part to form a third welding part, and the lifting drive 410 drives the transparent press 420 and the film pressing tool 430 to move and flexibly press the third welding part.

[0074] In this step, the third infrared welding part 600 infrared welds at least part of the second welding part to form a third welding part, and the lifting drive part 410 drives the transparent press 420 and the film pressing tool 430 to move and flexibly press the third welding part to discharge the bulge therein, so that the adhesive film can further increase the bonding area with the battery cell through three weldings.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery string welding device, used to arrange multiple battery cells, multiple welding ribbon groups, multiple adhesive films and multiple pressing tools in a battery string to be welded according to a preset arrangement, and weld them to form a battery string, characterized in that: The invention comprises a conveying mechanism (100), a first infrared welding component (200), a second infrared welding component (300), a pressing mechanism (400), a press tool carrier (710) and a press tool recovery channel (720), wherein the conveying mechanism (100) can convey the battery string to be welded to pass through a first workstation and a second workstation in sequence, the first infrared welding component (200) and the second infrared welding component (300) are arranged on the conveying mechanism (100) at intervals, the press tool recovery channel (720) is located above the conveying mechanism (100), the first infrared welding component (200) is used to infrared weld at least a portion of the battery string to be welded passing through the first workstation to form a first welding portion, and the second infrared welding component (300) is used to infrared weld the first battery string passing through the second workstation. At least part of the welding part is infrared welded to form a second welding part. The pressing mechanism (400) is arranged on the conveying mechanism (100) or on the second infrared welding part (300). When the pressing mechanism (400) is arranged on the conveying mechanism (100), the press tool carrier (710) carries the press tool in the second welding part to the press tool recovery channel (720), and the pressing mechanism (400) presses the second welding part. When the pressing mechanism (400) is arranged on the second infrared welding part (300), the press tool carrier (710) carries the press tool in the first welding part to the press tool recovery channel (720), and the pressing mechanism (400) presses the second welding part.

2. The battery string welding equipment according to claim 1, characterized in that: It also includes a cooling member (500), which is arranged on the conveying mechanism (100) and is used to cool the second welding part after being pressed by the pressing mechanism (400).

3. The battery string welding equipment according to claim 1, characterized in that: In the case where the pressing mechanism (400) is arranged on the conveying mechanism (100), it also includes a third infrared welding component (600), the pressing mechanism (400) includes a lifting driving component (410), a light-transmitting pressing tool (420) and a film pressing tool (430), the lifting driving component (410) is arranged on the conveying mechanism (100), the light-transmitting pressing tool (420) and the film pressing tool (430) are sequentially connected to the conveying direction of the conveying mechanism (100) The driving end of the lifting drive member (410) is floatingly connected, the pressing surface of the light-transmitting press (420) and the pressing surface of the film pressing member (430) are coplanar, the third infrared welding member (600) is arranged on the light-transmitting press (420) and is opposite to the pressing surface of the light-transmitting press (420), and the third infrared welding member (600) is used for infrared welding at least part of the second welding part, wherein the third infrared welding member (600) is an LED infrared welding head.

4. The battery string welding equipment according to claim 1, characterized in that: A heat-insulating component (800) is provided between the first infrared welding component (200) and the second infrared welding component (300), and the heat-insulating component (800) is used to perform heat-insulating treatment on the first welding portion located between the first workstation and the second workstation.

5. The battery string welding equipment according to claim 1, characterized in that: The first infrared welding component (200) is an infrared lamp welding head, and the second infrared welding component (300) is an infrared LED welding head, or both the first infrared welding component (200) and the second infrared welding component (300) are infrared LED welding heads.

6. A welding method, applicable to the battery string welding device according to any one of claims 1 to 5, characterized in that: include: The conveying mechanism (100) drives the battery string to be welded to move a preset distance in steps at a preset time; At least part of the battery string to be welded is moved to the first workstation, and the first infrared welding member (200) infrared welds at least part of the battery string to be welded at a first preset temperature to form the first welding part; The first welding part moves to the second workstation, and the second infrared welding member (300) infrared welds at least part of the first welding part at a second preset temperature to form the second welding part, wherein the first preset temperature is less than or equal to the second preset temperature; When the pressing mechanism (400) is arranged on the conveying mechanism (100), the press tool carrier (710) carries the press tool in the second welding part to the press tool recovery channel (720), the second welding part is moved to the third station, and the pressing mechanism (400) presses the second welding part; when the pressing mechanism (400) is arranged on the second infrared welding part (300), the press tool carrier (710) carries the press tool in the first welding part to the press tool recovery channel (720), and the pressing mechanism (400) presses the second welding part.

7. The welding method according to claim 6, characterized in that: Also includes: The second welding part moves to the fourth station, and the cooling member (500) cools the second welding part, wherein the first station, the second station, the third station and the fourth station are arranged in sequence along the first direction.

8. The welding method according to claim 6, characterized in that: After at least part of the battery string to be welded is moved to the first station, and the first infrared welding member (200) infrared welds at least part of the battery string to be welded at a first preset temperature to form the first welding part, the step further includes: The heat-insulating member (800) performs heat-insulating treatment on the first welding portion located between the first station and the second station.

9. The welding method according to claim 6, characterized in that: In the case where the pressing mechanism (400) is arranged on the conveying mechanism (100), the pressing tool transporting hand (710) transports the pressing tool in the second welding part to the pressing tool recovery channel (720), and the second welding part moves to the third station. The step of the pressing mechanism (400) pressing the second welding part includes: When the second welding part passes through the third workstation, the third infrared welding part (600) infrared welds at least part of the second welding part to form a third welding part, and the lifting drive (410) drives the light-transmitting press (420) and the film pressing tool (430) to move and flexibly press the third welding part.

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