Processing method of film-coated battery string and string manufacturing equipment

Abstract

The invention discloses a processing method and string manufacturing equipment of a film-coated battery string, and the processing method comprises the steps: enabling a plurality of battery pieces and a plurality of groups of welding strips to be connected in series through membranes, enabling the welding strips laid on the surfaces of the battery pieces to be bonded through the membranes, and enabling the welding strips to be located between the membranes and the battery pieces; when a membrane is laid on the surface of the welding strip, pressing the membrane, heating the membrane for the first time, and gluing the membrane with the battery piece and the welding strip to form a film-coated battery string; and carrying out secondary pressing on all or partial areas of the plurality of film covering areas on the film covering battery string, so that the diaphragms of all or partial areas of the plurality of film covering areas are glued and compounded with the battery pieces and the welding strips. According to the scheme, the problems that a plurality of shadows appear on an electroluminescent image formed by the film-coated battery string during EL detection due to poor lap joint of the solder strip group and the grid line of the battery piece due to the bulge area of the film-coated battery string, and the qualified rate is reduced due to solder strip deviation caused by the warping of the end part of the solder strip can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of film-coated battery string preparation, and in particular to a processing method and string-making equipment for film-coated battery strings. Background Art

[0002] The film-coated battery string includes a conventional film-coated battery string and a back-contact film-coated battery string, wherein the conventional film-coated battery string is connected in series by connecting the backlight surface of one of two adjacent battery cells and the light-receiving surface of the other one in a one-to-one correspondence through multiple groups of welding ribbons, and adopts low-temperature welding to fix each group of welding ribbons by laying a film on the backlight surface and light-receiving surface of each battery cell; the back-contact film-coated battery string is connected in series by setting multiple groups of welding ribbons on the backlight surface of multiple battery cells, and adopts low-temperature welding to adhere each group of welding ribbons to each battery cell through a film.

[0003] In the related art, infrared light is used as the first heating element to heat the diaphragm so that it melts and adheres to the battery cell, and the welding tape group is fixed to ensure electrical connection with the grid line of the battery cell. However, when laying the battery string, part of the diaphragm is first crimped onto most of the area of ​​the welding tape, and the controlled welding tape end can only be released after the diaphragm, welding tape and battery cell are partially crimped. As a result, the controlled welding tape end is higher than the plane where the welding tape and the battery cell surface are combined, and the welding tape end is easily bent. The bent welding tape will cause local poor series connection between the welding tape and the battery cell. In addition, the way the diaphragm melts and adheres to the battery cell is prone to bulging. The bulged area of ​​the film-coated battery string will cause poor overlap of the welding tape group and the grid line of the battery cell, resulting in multiple shadows in the electroluminescent image formed by the film-coated battery string during EL detection, thereby reducing the qualified rate. Summary of the Invention

[0004] The object of the present invention is to provide a method for processing a film-coated battery string to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: On the one hand, the present application provides a method for processing a film-coated battery string, comprising:

[0006] Connecting a plurality of battery cells and a plurality of welding ribbons in series through a membrane, and bonding the welding ribbons laid on the surface of the battery cells through the membrane, with the welding ribbons being located between the membrane and the battery cells;

[0007] When the film is laid on the surface of the soldering tape, the film is pressed and heated to glue the film to the battery cell and the soldering tape to form a film-coated battery string;

[0008] The film-coated battery string is heated to a preset temperature, and the entire or partial areas of the multiple film-coated regions on the film-coated battery string are pressed for a second time, so that the entire or partial areas of the film sheets of the multiple film-coated regions are bonded and composited with the battery sheets and the welding strips.

[0009] Preferably, the entire or partial areas of the plurality of film-coated regions on the film-coated battery string are laminated for the second time, and the laminated portions of the battery string are heated for the second time.

[0010] Preferably, the local area lamination includes: the middle of each battery cell or both sides of the battery cell from which the welding strip extends or one side of the battery cell.

[0011] Preferably, the secondary pressing step of the entire or partial area of ​​the multiple film areas on the film-coated battery string includes: rolling the entire film area of ​​the multiple film areas; or flat pressing the entire film area of ​​the multiple film areas; or flat pressing the partial film area of ​​the multiple film areas.

[0012] Preferably, the secondary lamination step of the entire or partial area of ​​the multiple film-coated areas on the film-coated battery string includes: rolling or pressing the multiple film-coated areas on the film-coated battery string in sequence, or rolling or pressing the multiple film-coated areas on the film-coated battery string synchronously.

[0013] Preferably, it also includes:

[0014] The multiple film regions of the film-covered battery string are pressed again after the secondary pressing of all or part of the multiple film regions on the film-covered battery string.

[0015] Preferably, the step of laying a film on the surface of the solder strip includes: the solder strip is laid on the backlight surface of the battery cell, and the film is a first film laid on the surface of the solder strip on the backlight surface of the battery cell, or, the solder strip is laid on the backlight surface and the light-receiving surface of the battery cell, and the film includes a first film laid on the surface of the solder strip on the light-receiving surface of the battery cell and a second film laid on the surface of the solder strip on the backlight surface of the battery cell.

[0016] On the other hand, the present application also provides a string making device for implementing the above-mentioned film-coated battery string processing method, comprising:

[0017] The sheet distributing mechanism is used to carry the battery sheets and combine them with the welding ribbons;

[0018] A welding ribbon preparation device, used to combine the prepared welding ribbon into sections with the battery cell;

[0019] A membrane preparation device, used to prepare a membrane for matching with the battery cell;

[0020] The first heating mechanism is used to heat the laid membrane, welding ribbon, and battery cells, heating the membrane to glue and weld and the battery cells to form a film-coated battery string;

[0021] The first pressing mechanism is used to combine the membrane, the welding ribbon, and the battery cell to form a film-coated battery string to be fixed;

[0022] The second pressing mechanism is provided at a subsequent station of the first pressing mechanism and is used for secondary pressing the membrane of the entire or partial area of ​​the multiple film-coated areas of the film-coated battery string with the battery sheet and the welding strip.

[0023] Preferably, the second heating mechanism is used to heat the film-covered battery string;

[0024] The second pressing mechanism is a transporting and pressing mechanism, which is used to perform secondary pressing on multiple film-coated areas of the film-coated battery string and to transport the film-coated battery string after secondary pressing to a subsequent process.

[0025] Preferably, the second heating mechanism is used to heat the film-covered battery string;

[0026] The transporting and pressing mechanism is provided at the rear end of the second pressing mechanism and is used to transport the film-coated battery string from the first heating mechanism to the second heating mechanism. While the second heating mechanism reheats the film-coated battery string, the transporting and pressing mechanism synchronously presses the multiple film-coated areas.

[0027] Preferably, a third pressing mechanism is further included for rolling or pressing the multiple coated areas of the heated coated battery string in sequence, or for synchronously rolling or pressing the multiple coated areas on the reheated coated battery string.

[0028] Preferably, the first heating mechanism includes a pressing hand, a first conveying channel and a first heating element. The first conveying channel is used to carry the membrane, welding ribbon and battery cell. The pressing hand is used to press the coating area. The first heating element is arranged on the first conveying channel. The first heating element is used to heat the membrane, welding ribbon and battery cell carried by the first conveying channel to form the coated battery string.

[0029] Preferably, the transporting and pressing mechanism includes a transporting hand and a pressing member, the second heating mechanism includes a second conveying channel and a second heating member, the second heating member is arranged on the second conveying channel, and the pressing member is arranged on the transporting hand, the transporting hand is used to transport the coated battery string from the first heating mechanism to the second conveying channel, the second heating member is used to heat the coated battery string carried by the second conveying channel, and the pressing member is used to press the coated battery string while the second heating member heats the coated battery string carried by the second conveying channel.

[0030] Preferably, the second pressing mechanism includes a lifting drive member, a connecting member and a flexible roller, the lifting drive member is arranged on the discharge end of the second conveying channel, the connecting member is arranged on the driving end of the lifting drive member, and the flexible roller is rotatably arranged on the connecting member. In the vertical direction, the flexible roller is arranged opposite to the bearing surface of the second conveying channel.

[0031] The technical solution adopted in this application can achieve the following beneficial effects:

[0032] The present application discloses a method for processing a film-coated battery string, comprising:

[0033] Connect several battery cells and multiple sets of welding ribbons in series through a membrane, and bond the welding ribbons laid on the surface of the battery cells through the membrane, with the welding ribbons located between the membrane and the battery cells;

[0034] When the film is laid on the surface of the soldering tape, the film is pressed and heated to glue the cell sheet and the soldering tape together to form a film-coated cell string.

[0035] In this step, the film is placed in a bonded state by heating, thereby facilitating each soldering strip to be bonded to each battery cell.

[0036] The film-coated battery string is heated to a preset temperature, which is the temperature at which the membrane is still in a bonded state. The entire or partial areas of the multiple film-coated areas on the film-coated battery string are pressed a second time, so that the entire or partial areas of the membranes in the multiple film-coated areas are bonded and composited with the battery cells and welding strips.

[0037] In this step, by performing a second pressing on the film-coated battery string under a preset temperature, the first sub-areas of the multiple film areas on the film-coated battery string where there are bulges, non-bonding, curled ends of the welding strips, and bending are subjected to secondary bonding and pressing, especially the two side edge areas between two adjacent battery cells, thereby increasing the adhesion area of ​​the first film, or the first film and the second film and the battery cell, as well as the certificate of the ends of the welding strips, to ensure a fixed connection between the welding strip group and the grid lines of the battery cell.

[0038] Heat the film-coated battery string and press multiple film-coated areas simultaneously.

[0039] Since the above-mentioned step performs a second pressing on the heated film-coated battery string, the first film, or the first film and the second film will cool down and lose their stickiness. Therefore, by heating again, the first film, or the first film and the second film are in a glued state and pressed again, thereby further increasing the adhesion area of ​​the first film, or the first film and the second film and the battery cell, ensuring the fixed connection between the welding ribbon and the grid line of the battery cell, and flattening the end of the welding ribbon and accurately overlapping the battery cell, thereby reducing the shadow area of ​​the electroluminescent image formed by the film-coated battery string during EL detection, thereby reducing the qualified rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0041] Figure 1 This is a schematic diagram of a first type of battery string cloth sheet in the related art;

[0042] Figure 2 Schematic diagram of a second type of battery string cloth sheet in the related art;

[0043] Figure 3 This is a schematic structural diagram of the skewer making device disclosed in an embodiment of the present application;

[0044] Figure 4 This is a schematic structural diagram of the second heating mechanism and the transporting and pressing mechanism disclosed in the embodiment of the present application;

[0045] Figure 5 A schematic structural diagram of the first heating mechanism disclosed in an embodiment of the present application.

[0046] In the figure: 10, first diaphragm; 20, welding ribbon; 30, battery cell; 40, second diaphragm; 100, first heating mechanism; 110, first conveying channel; 120, first heating element; 200, first pressing mechanism; 300, second heating mechanism; 310, second conveying channel; 320, second heating element; 400, transporting and pressing mechanism; 410, transporting hand; 420, pressing element; 500, second pressing mechanism; 510, lifting drive member; 520, connecting member; 530, flexible roller. DETAILED DESCRIPTION

[0047] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0048] 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 referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0049] 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.

[0050] like Figures 1 to 5 As shown, the present application discloses a method for processing a film-coated battery string, and the disclosed method for processing a film-coated battery string includes:

[0051] Connecting a plurality of battery cells and a plurality of welding ribbons in series through a membrane, and bonding the welding ribbons laid on the surface of the battery cells through the membrane, with the welding ribbons being located between the membrane and the battery cells;

[0052] When the film is laid on the surface of the soldering tape, the film is pressed and heated once, and the film is glued to the battery cell and the soldering tape to form a film-coated battery string;

[0053] The film-coated battery string is heated to a preset temperature, and the entire or partial areas of the multiple film-coated regions on the film-coated battery string are pressed for a second time, so that the entire or partial areas of the film sheets of the multiple film-coated regions are bonded and composited with the battery sheets and the welding strips.

[0054] In this step, the film is placed in a bonded state by heating, which helps each soldering ribbon group to be bonded to each battery cell.

[0055] The use range of the preset temperature is the range in which the diaphragm itself can produce a bonding reaction, specifically including 50℃~200℃ or 80℃~180℃ or 100℃~150℃ or 80℃~200℃, etc. During the secondary pressing, the coated battery string is heated or heated and maintained within the preset temperature range, so that the diaphragm is kept in a bonded state and can be bonded to the battery cell and the welding ribbon.

[0056] The preset temperature can be a preset temperature maintained by the heated film when the heating film is bonded to the cell when forming the film-coated battery string. Furthermore, preferably, the film can be reheated to the pre-set temperature when the film is again in a bonded state by re-bonding the entire or partial areas of multiple film regions on the film-coated battery string. The bonded film can then be re-bonded with the soldering ribbon and the cell, and pressure is applied between the bonded film, the soldering ribbon, and the cell to achieve a tighter bond.

[0057] By performing a second pressing on the film-coated battery string at a preset temperature, the bulges, unbonded parts, battery cells and welding strips in multiple film areas on the film-coated battery string are pressed and bonded firmly again.

[0058] It can also continue to press the bent and raised part of the end of the welding ribbon onto the surface of the battery cell, and accurately press it onto the grid line on the surface of the battery cell, thereby improving the yield rate of EL detection. It can also squeeze and bond the gap between the welding ribbon and the battery cell caused by bulging for a second time, so that the diaphragm can adhere the welding ribbon more firmly to the surface of the battery cell.

[0059] This application provides two types of film-coated battery strings, refer to Figure 1 As shown, the first type is a back contact film battery string, wherein the backlight side of the battery cell 30 faces upward, and the soldering strips 20 are staggered and connected in series on the backlight side of each battery cell 30. The soldering strips 20 on each battery cell 30 are bonded and fixed to the backlight side of the battery cell 30 through the first film 10. Figure 2 As shown, the backlight side of the battery cell 30 is facing upwards, and the soldering strip 20 is connected to the light-receiving surface of the two adjacent battery cells 30 and the backlight side of another battery cell 30. The soldering strip 20 on the light-receiving side of the battery cell 30 is bonded and fixed by the first film 10, and the soldering strip 20 on the light-receiving side of the battery cell 30 is partially bonded and fixed to the surface of the battery cell 30 by the second film 40 facing away from the first film 10.

[0060] The processing steps for the first type of film-coated battery string specifically include:

[0061] S1, a plurality of first film sheets 10 and a plurality of welding ribbon groups are fixedly laid on the backlight surfaces of a plurality of battery cells of the array in a one-to-one correspondence,

[0062] S2. Press the membrane and heat it while pressing. The first membrane 10, the welding ribbon 20, and the battery cell 30 are bonded and connected in series to form a film-coated battery string.

[0063] S3. Press the entire or part of the first film 10 on the film-covered battery string for a second time.

[0064] The processing steps for the second type of film-coated battery string specifically include:

[0065] S1. Fixing a plurality of welding ribbon groups one by one to the backlight surface of one of the adjacent two solar cells in the array and the light-receiving surface of the other, with the light-receiving surface and the backlight surface of each solar cell 30 both being covered with a first film 10 and a second film 40;

[0066] S2, pressing the first membrane 10 and the second membrane 40, heating to form a film-coated battery string;

[0067] S3 . Press the surface of the first diaphragm 10 or the second diaphragm 40 a second time.

[0068] The local area pressing includes: the middle of each battery cell or both sides of the battery cell or one side of the battery cell in the length direction of the corresponding welding strip.

[0069] In another embodiment, the secondary pressing step of the entire or partial areas of the multiple film areas on the film-coated battery string includes: rolling the entire film areas of the multiple film areas; or flat pressing the entire film areas of the multiple film areas; or flat pressing the partial film areas of the multiple film areas.

[0070] The multiple film-coated areas on the film-coated battery string are rolled or pressed in sequence, or the multiple film-coated areas on the film-coated battery string are rolled or pressed synchronously.

[0071] In this step, the first sub-areas with bulges, non-adhesion, etc. in the multiple coated areas on the coated battery string are subjected to secondary bonding by rolling or pressing, especially the two side edge areas between two adjacent battery cells 30, thereby increasing the adhesion area of ​​the first membrane 10, or the first membrane 10 and the second membrane 40 and the battery cell, and ensuring the fixed connection between the welding tape group and the grid line of the battery cell.

[0072] Since the heated film-coated battery string is pressed a second time in the above-mentioned step, the first film 10, or the first film 10 and the second film 40 may cool down and lose their stickiness. Therefore, by heating again, the first film 10, or the first film 10 and the second film 40 are in a glued state and pressed again, thereby further increasing the adhesion area of ​​the first film 10, or the first film 10 and the second film 40 to the battery cell, ensuring the fixed connection between the welding ribbon group and the grid line of the battery cell, and thereby reducing the shadow area of ​​the electroluminescent image formed by the film-coated battery string during EL detection, thereby reducing the qualified rate.

[0073] In the embodiments of the present application, the disclosed processing method may further include:

[0074] S4. Rolling or pressing the multiple film-coated regions of the heated film-coated battery string in sequence, or rolling or pressing the multiple film-coated regions of the reheated film-coated battery string simultaneously.

[0075] In this step, the second sub-areas including bulges and non-bonds in the multiple coated areas on the coated battery string are subjected to secondary bonding by rolling or pressing, especially the two side edge areas between two adjacent battery cells, thereby further improving the adhesion area of ​​the first membrane 10, or the first membrane 10 and the second membrane 40 to the battery cell, ensuring the fixed connection between the welding tape group and the grid line of the battery cell. It is worth noting that part of the first sub-area overlaps with part of the second sub-area, that is, the first sub-area is not equivalent to the second sub-area, and in the vertical direction, the projected part of the first sub-area overlaps with the projected part of the second sub-area.

[0076] In an embodiment of the present application, the step of sequentially rolling or pressing the multiple film-coated areas on the film-coated battery string, or synchronously rolling or pressing the multiple film-coated areas on the film-coated battery string, includes:

[0077] S21 , rolling or pressing the first sub-regions of the multiple film-coated regions of the film-coated battery string in sequence, or rolling or pressing the first sub-regions of the multiple film-coated regions of the film-coated battery string synchronously.

[0078] In this step, the first sub-region is the area in the coating area where bulges, non-adhesion, etc. exist. By precisely pressing the first sub-region, time can be saved and rolling efficiency can be improved compared to the rolling method.

[0079] In an embodiment of the present application, the steps of heating the film-coated battery string and synchronously pressing multiple film-coated areas include:

[0080] S31 , pressing the second sub-areas of the plurality of film-coated areas simultaneously again on the heated film-coated battery string.

[0081] In this step, the second sub-region is an area in the coating area after rolling or pressing where bulges or non-adhesion still exist. By heating again and pressing the second sub-region, the adhesion area between the first diaphragm 10, or the first diaphragm 10 and the second diaphragm 40 and the battery cell is further increased to ensure a fixed connection between the welding tape group and the grid line of the battery cell. It is worth noting that precise pressing of the second sub-region can avoid repeated pressing of other areas of the coating area, and also avoid the risk of hidden cracks in the battery cell due to repeated pressing.

[0082] In an embodiment of the present application, the step of sequentially rolling or pressing the multiple film-coated areas of the heated film-coated battery string, or the step of synchronously rolling or pressing the multiple film-coated areas on the heated film-coated battery string, includes:

[0083] S41 , rolling or pressing the third sub-regions of the multiple film-coated regions of the reheated film-coated battery string in sequence, or rolling or pressing the third sub-regions of the multiple film-coated regions of the reheated film-coated battery string synchronously.

[0084] In this step, the third sub-region with bulges, non-adhesion, etc. in the multiple coated areas on the heated coated battery string is subjected to secondary bonding by rolling or pressing, especially the two side edge areas between two adjacent battery cells, thereby increasing the adhesion area of ​​the first membrane 10, or the first membrane 10 and the second membrane 40 to the battery cell, ensuring the fixed connection between the welding tape group and the grid line of the battery cell. It is worth noting that the third sub-region overlaps with part of the first sub-region or part of the second sub-region, that is, the third sub-region is not equivalent to the first sub-region or the second sub-region, and in the vertical direction, the projected part of the first sub-region or the second sub-region overlaps with the projected part of the third sub-region.

[0085] The present application also discloses a string-making device for implementing the above-mentioned film-coated battery string processing method. The disclosed string-making device includes:

[0086] The sheet distributing mechanism is used to carry the battery sheets and combine them with the welding ribbons;

[0087] A welding ribbon preparation device, used to combine the prepared welding ribbon into sections with the battery cell;

[0088] A membrane preparation device, used to prepare a membrane for matching with the battery cell;

[0089] The first heating mechanism 100 is used to carry multiple first films 10 and multiple welding ribbon groups and fix them one by one on the backlight surface of multiple battery cells in the array, or to fix multiple welding ribbon groups one by one on the backlight surface of one of two adjacent battery cells in the array and the light-receiving surface of the other. The light-receiving surface and the backlight surface of each battery cell are covered with the first film 10 and the second film 40, and are heated to form a film-coated battery string.

[0090] The first pressing mechanism 200 is used to roll or press the multiple film-coated areas on the film-coated battery string in sequence, or to roll or press the multiple film-coated areas on the film-coated battery string synchronously.

[0091] Second pressing mechanism

[0092] In addition, the string making equipment also includes:

[0093] The second heating mechanism 300 is used to heat the film-coated battery string;

[0094] The second pressing mechanism is a transporting and pressing mechanism 400, which is used to transport the film-coated battery string from the first heating mechanism 100 to the second heating mechanism 300. While the second heating mechanism 300 reheats the film-coated battery string, the transporting and pressing mechanism 400 can simultaneously press multiple film-coated areas.

[0095] In another embodiment, the string making device further comprises:

[0096] The second heating mechanism 300 is used to heat the film-coated battery string;

[0097] And the transporting and pressing mechanism 400 provided at the rear end of the second pressing mechanism is used to transport the coated battery string from the first heating mechanism 100 to the second heating mechanism 300. While the second heating mechanism 300 reheats the coated battery string, the transporting and pressing mechanism 400 can simultaneously press multiple coated areas and perform a third pressing on multiple coated areas of the coated battery string.

[0098] During the use of the string-making device, the feeding mechanism of the string-making device fixes and lays multiple first film sheets 10 and multiple welding tape groups on the backlight surface of multiple battery cells in the array in a one-to-one correspondence, or fixes multiple welding tape groups on the backlight surface of one of the adjacent two battery cells in the array and the light-receiving surface of the other one and places them on the first heating mechanism 100, and the first heating mechanism 100 heats them to form a film-coated battery string; the first pressing mechanism 200 rolls or presses the multiple film areas on the film-coated battery string in sequence, or presses the film-coated battery string in sequence. The multiple film-coated areas on the cell string are rolled or pressed synchronously to increase the adhesion area between the first film sheet 10, or the first film sheet 10 and the second film sheet 40 and the cell sheet; the second heating mechanism 300 heats the film-coated cell string, and the conveying and pressing mechanism 400 synchronously presses the multiple film-coated areas of the heated film-coated cell string to further increase the adhesion area between the first film sheet 10, or the first film sheet 10 and the second film sheet 40 and the cell sheet, thereby reducing the shadow area of ​​the electroluminescent image formed by the film-coated cell string during EL detection.

[0099] Of course, in an optional solution, the first pressing mechanism 200 may include a telescopic driving member and a flexible pressing member 420. Specifically, the flexible pressing member 420 is provided on the driving end of the lifting driving member 510. In the vertical direction, the flexible pressing member 420 is arranged opposite to the bearing surface of the discharge end of the first heating mechanism 100. The lifting driving member 510 can drive the flexible pressing member 420 to press the multiple film-coated areas of the film-coated battery string synchronously or sequentially. The telescopic driving member can be a pneumatic cylinder, an electric cylinder, a hydraulic cylinder, etc., and this application does not impose any restrictions on this.

[0100] In another optional solution, the first pressing mechanism 200 may include a telescopic drive member, a connecting member 520, and a flexible roller 530. Specifically, the connecting member 520 is elastically mounted on the driving end of the lifting drive member 510, and the flexible roller 530 is rotatably mounted on the connecting member 520. In the vertical direction, the flexible roller 530 is disposed opposite the bearing surface of the discharge end of the first heating mechanism 100. The first heating mechanism 100 can carry the coated battery string for horizontal movement, and the telescopic drive member can drive the flexible roller 530 to approach and roll the multiple coated areas of the coated battery string. The telescopic drive member can be a pneumatic cylinder, an electric cylinder, a hydraulic cylinder, etc., and this application does not impose any restrictions on this.

[0101] In addition, there are many ways for the transporting and pressing mechanism 400 to transport the coated battery string from the first heating mechanism 100 to the second heating mechanism 300. For example, the first heating mechanism 100 can be moved to be spaced apart from the second heating mechanism 300, and the transporting and pressing mechanism 400 can be linearly moved between the first heating mechanism 100 and the second heating mechanism 300 to realize the transport of the coated battery string, or the first heating mechanism 100 is fixed and arranged at intervals with the second heating mechanism 300, and the transporting and pressing mechanism 400 has two driving parts with mutually perpendicular driving directions, which can realize the transport of the coated battery string from the first heating mechanism 100 to the second heating mechanism 300, or the first heating mechanism 100 is fixed and arranged linearly spaced apart from the second heating mechanism 300, and the transporting and pressing mechanism 400 moves linearly to transport the coated battery string from the first heating mechanism 100 to the second heating mechanism 300. The above method comprehensively considers the layout of multiple mechanisms in the string making equipment, and this application does not impose any restrictions on this.

[0102] In an embodiment of the present application, the disclosed string-making device may further include a second pressing mechanism 500 for sequentially rolling or pressing the multiple coated areas of the heated coated battery string, or synchronously rolling or pressing the multiple coated areas on the reheated coated battery string.

[0103] In an optional solution, the first heating mechanism 100 may include a carrier, an infrared welding head and a plurality of presses. Specifically, the carrier is used to carry a plurality of arrays of battery cells and a plurality of first film sheets 10 fixedly laid on the backlight surface thereof, or to carry a plurality of arrays of battery cells and a plurality of adjacent battery cells and a plurality of overlapping welding ribbon groups on the backlight surface and the light-receiving surface of the other one, and each light-receiving surface and backlight surface of each battery cell are paved with a first film sheet 10 and a second film sheet 40. The infrared welding head is used to carry the carrier. Multiple welding tape groups and multiple first films 10 are fixedly laid one by one on the backlight surface of the battery cells carrying multiple arrays, or welding tape groups are overlapped one by one on the backlight surface of one of the two adjacent battery cells carrying multiple arrays and the light-receiving surface of the other. The light-receiving surface and the backlight surface of each battery cell are laid with the first film 10 and the second film 40, and heated to form a film-coated battery string. Multiple presses can fix the first film 10 and the welding tape group or the first film 10, the second film 40 and the welding tape group on the battery cell one by one.

[0104] In another optional solution, the first heating mechanism 100 may include a pressing hand, a first conveying channel 110 and a first heating element 120. The first conveying channel 110 is used to carry a plurality of arrays of battery cells and a plurality of first film sheets 10 fixedly laid on the backlight surface of the battery cells, or to carry a plurality of arrays of battery cells and a plurality of adjacent battery cells and a plurality of overlapping welding tape groups on the backlight surface of one of the two and the light-receiving surface of the other, and each light-receiving surface and backlight surface of each battery cell are laid with a first film sheet 10 and a second film sheet 40. The pressing hand The first heating element 120 is used to press the film coating area. The first heating element 120 is provided on the first conveyor channel 110. The first heating element 120 is used to carry multiple first film sheets 10 and multiple welding ribbon groups on the first conveyor channel 110 and fix them one by one on the backlight surface of multiple battery cells in the array, or fix multiple welding ribbon groups one by one on the backlight surface of one of two adjacent battery cells in the array and the light-receiving surface of the other. The light-receiving surface and the backlight surface of each battery cell are both laid with the first film sheet 10 and the second film sheet 40, and heated to form a film-coated battery string. In addition, the first conveyor channel 110 can be a conveyor belt channel, a transport fork channel, etc., and this application does not impose any restrictions on this.

[0105] In an embodiment of the present application, the transporting and pressing mechanism 400 may include a transporting hand 410 and a pressing member 420, and the second heating mechanism 300 may include a second conveying channel 310 and a second heating member 320. Specifically, the second heating member 320 is arranged on the second conveying channel 310, and the pressing member 420 is arranged on the transporting hand 410. The transporting hand 410 is used to transport the coated battery string from the first heating mechanism 100 to the second conveying channel 310, and the second heating member 320 is used to heat the coated battery string carried by the second conveying channel 310. The pressing member 420 is used to press the coated battery string while the second heating member 320 heats the coated battery string carried by the second conveying channel 310.

[0106] In an optional solution, the second pressing mechanism 500 may include a lifting drive 510 and a flexible pressure plate. Specifically, the lifting drive 510 is disposed at the discharge end of the second conveyor channel 310, and the flexible pressure plate is disposed at the driving end of the lifting drive 510. In the vertical direction, the flexible pressure plate is disposed opposite the bearing surface of the second conveyor channel 310. The lifting drive 510 can drive the flexible pressure plate to synchronously or sequentially press multiple film-coated areas of the film-coated battery string. In addition, the lifting drive 510 can be a pneumatic cylinder, an electric cylinder, a hydraulic cylinder, etc., and this application does not impose any restrictions on this.

[0107] In another optional solution, the second pressing mechanism 500 may include a lifting drive 510, a connecting member 520, and a flexible roller 530. Specifically, the lifting drive 510 is provided at the discharge end of the second conveying channel 310, the connecting member 520 is provided on the driving end of the lifting drive 510, and the flexible roller 530 is rotatably provided on the connecting member 520. In the vertical direction, the flexible roller 530 is arranged opposite to the bearing surface of the second conveying channel 310. The lifting drive 510 can drive the flexible roller 530 to roll the multiple coating areas of the coated battery string. In addition, the lifting drive 510 can be a pneumatic cylinder, an electric cylinder, a hydraulic cylinder, etc., and this application does not impose any restrictions on this.

[0108] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing a film-coated battery string, characterized in that: include: Connecting a plurality of battery cells and a plurality of welding ribbons in series through a membrane, and bonding the welding ribbons laid on the surface of the battery cells through the membrane, with the welding ribbons being located between the membrane and the battery cells; When the film is laid on the surface of the soldering tape, the film is pressed and heated to glue the film to the battery cell and the soldering tape to form a film-coated battery string; The film-coated battery string is heated to a preset temperature, and the entire or partial areas of the multiple film-coated regions on the film-coated battery string are pressed for a second time, so that the entire or partial areas of the film sheets of the multiple film-coated regions are bonded and composited with the battery sheets and the welding strips.

2. The method for processing a film-coated battery string according to claim 1, characterized in that: The entire or partial areas of the plurality of film-coated regions on the film-coated battery string are secondarily pressed, and at the same time, the pressed portion of the film-coated battery string is secondarily heated to the preset temperature.

3. The method for processing a film-covered battery string according to claim 1, characterized in that: The local area pressing includes: the middle of each battery cell or both sides of the battery cell or one side of the battery cell.

4. The method for processing a film-covered battery string according to claim 1, characterized in that: The secondary pressing step of the entire or partial areas of the multiple film regions on the film-coated battery string includes: rolling the entire film areas of the multiple film regions; or flat pressing the entire film areas of the multiple film regions; or flat pressing the partial film areas of the multiple film regions.

5. The method for processing a film-covered battery string according to claim 1, characterized in that: The step of secondary laminating all or part of the areas of the multiple film-coated regions on the film-coated battery string includes: rolling or pressing the multiple film-coated regions on the film-coated battery string in sequence, or rolling or pressing the multiple film-coated regions on the film-coated battery string synchronously.

6. The method for processing a film-covered battery string according to claim 1, characterized in that: Also includes: The multiple film regions of the film-covered battery string are pressed again after the secondary pressing of all or part of the multiple film regions on the film-covered battery string.

7. The method for processing a film-covered battery string according to claim 1, characterized in that: The step of laying a film on the surface of the solder strip includes: the solder strip is laid on the backlight surface of the battery cell, and the film is a first film laid on the surface of the solder strip on the backlight surface of the battery cell, or, the solder strip is laid on the backlight surface and the light-receiving surface of the battery cell, and the film includes a first film laid on the surface of the solder strip on the light-receiving surface of the battery cell and a second film laid on the surface of the solder strip on the backlight surface of the battery cell.

8. A string-making device for implementing the method for processing a film-covered battery string according to any one of claims 1 to 7, characterized in that: include: The sheet distributing mechanism is used to carry the battery sheets and combine them with the welding ribbons; A welding ribbon preparation device, used to combine the prepared welding ribbon into sections with the battery cell; A membrane preparation device, used to prepare a membrane for matching with the battery cell; The first heating mechanism is used to heat the laid membrane, welding ribbon, and battery cells, heating the membrane to glue and weld and the battery cells to form a film-coated battery string; The first pressing mechanism is used to combine the membrane, the welding ribbon, and the battery cell to form a film-coated battery string to be fixed; The second pressing mechanism is provided at a subsequent station of the first pressing mechanism and is used for secondary pressing the membrane of the entire or partial area of ​​the multiple film-coated areas of the film-coated battery string with the battery sheet and the welding strip.

9. The string making device according to claim 8, characterized in that: Also includes: A second heating mechanism (300) is used to heat the film-covered battery string; The second pressing mechanism is a transport pressing mechanism (400), and the transport pressing mechanism (400) is used for secondary pressing of multiple film-coated areas of the film-coated battery string, and transporting the film-coated battery string after secondary pressing to a subsequent process.

10. The string making device according to claim 8, characterized in that: Also includes: A second heating mechanism (300) is used to heat the film-covered battery string; The transporting and pressing mechanism (400) is arranged at the rear end of the second pressing mechanism and is used to transport the film-coated battery string from the first heating mechanism (100) to the second heating mechanism (300). While the second heating mechanism (300) reheats the film-coated battery string, the transporting and pressing mechanism (400) synchronously presses the multiple film-coated areas.

11. The string making device according to claim 8, characterized in that: It also includes a third pressing mechanism (500) for rolling or pressing the multiple film-coated areas of the heated film-coated battery string in sequence, or for synchronously rolling or pressing the multiple film-coated areas on the film-coated battery string that has been heated again.

12. The skewer making device according to claim 8, characterized in that: The first heating mechanism (100) comprises a pressing hand, a first conveying channel (110) and a first heating element (120); the first conveying channel (110) is used to carry a membrane, a welding ribbon and a battery cell; the pressing hand is used to press a film-coated area; the first heating element (120) is arranged on the first conveying channel (110); the first heating element (120) is used to heat the membrane, the welding ribbon and the battery cell carried by the first conveying channel (110) to form the film-coated battery string.

13. The string making device according to claim 9 or 10, characterized in that: The transporting and pressing mechanism (400) includes a transporting hand (410) and a pressing member (420); the second heating mechanism (300) includes a second conveying channel (310) and a second heating member (320); the second heating member (320) is arranged on the second conveying channel (310); the pressing member (420) is arranged on the transporting hand (410); the transporting hand (410) is used to transport the film-coated battery string from the first heating mechanism (100) to the second conveying channel (310); the second heating member (320) is used to heat the film-coated battery string carried by the second conveying channel (310); and the pressing member (420) is used to press the film-coated battery string while the second heating member (320) heats the film-coated battery string carried by the second conveying channel (310).

14. The skewer making device according to claim 13, characterized in that: The second pressing mechanism (500) comprises a lifting drive member (510), a connecting member (520) and a flexible roller (530), wherein the lifting drive member (510) is arranged on the discharge end of the second conveying channel (310), the connecting member (520) is arranged on the driving end of the lifting drive member (510), and the flexible roller (530) is rotatably arranged on the connecting member (520). In the vertical direction, the flexible roller (530) is arranged opposite to the bearing surface of the second conveying channel (310).

Images