A film strip preparation mechanism and a stringer

Abstract

The application provides a film strip preparation mechanism and a string welding machine, comprising a film belt feeding mechanism, a cutting bearing platform, a film belt cutting mechanism, a film strip carrying mechanism and a film strip spacing mechanism, wherein: the film belt feeding mechanism is arranged in front of the cutting bearing platform, and the film belt feeding mechanism provides the film belt to be cut to the cutting bearing platform along the first horizontal direction; the cutting bearing platform is used for positioning the film belt provided by the film belt feeding mechanism; the film belt cutting mechanism is used for cutting the film belt on the cutting bearing platform along the second horizontal direction perpendicular to the first horizontal direction to obtain a plurality of film strips; the film strip carrying mechanism is used for picking up the plurality of film strips from the cutting bearing platform and carrying the picked up plurality of film strips to the film strip spacing mechanism; and the film strip spacing mechanism is used for spacing the plurality of film strips, so that the spacing between the plurality of film strips is a first predetermined value. The film strip preparation mechanism of the application can obtain a plurality of film strips by executing a cutting action once, thereby improving the film strip preparation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery production, in particular to a film strip preparation mechanism and a string welding machine. BACKGROUND

[0002] The IBC (Interdigitated Back Contact) battery is a full back electrode contact battery, which adopts a technology that the positive and negative metal contacts of a solar cell are located on the back of the battery. Since there is no grid line on the front of the battery, the light receiving area of the battery is greatly improved, thereby improving the power generation efficiency.

[0003] In an IBC battery string, the welding strip is laid on the back of the battery, and two adjacent battery pieces are connected by a group of welding strips. From the front of the battery string, the welding strip exposed at the inter-piece spacing of the two adjacent battery pieces, and the welding strip at the string head and the string tail can be seen. For the sake of component aesthetics and other reasons, a film strip is generally laid at the inter-piece spacing and at the string head and string tail during the string laying process to shield the welding strip. The film strip is located between the battery piece and the welding strip, and the film strip can be adhered to the back of the battery piece after being heated and shield the welding strip.

[0004] An IBC battery string needs multiple film strips, and the existing film strip preparation mechanism can usually only prepare a single film strip at a time, which is low in preparation efficiency and is not conducive to improving the string laying efficiency of the IBC battery string. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a film strip preparation mechanism, and the specific technical solutions are as follows:

[0006] A film strip preparation mechanism, comprising a film belt loading mechanism, a cutting bearing platform, a film belt cutting mechanism, a film strip conveying mechanism and a film strip spacing mechanism, wherein:

[0007] The film belt loading mechanism is arranged in front of the cutting bearing platform, and the film belt loading mechanism is used to provide the film belt to be cut to the cutting bearing platform along the first horizontal direction;

[0008] The cutting bearing platform is used to position the film belt provided by the film belt loading mechanism;

[0009] The film belt cutting mechanism is used to cut the film belt on the cutting bearing platform along the second horizontal direction perpendicular to the first horizontal direction to obtain multiple film strips;

[0010] The film strip conveying mechanism is used to pick up the multiple film strips from the cutting bearing platform and convey the picked-up multiple film strips to the film strip spacing mechanism;

[0011] The film strip spacing mechanism is used to space the multiple film strips, so that the spacing between the multiple film strips is a first predetermined value.

[0012] It can be seen that the film strip preparation mechanism of the present application can obtain multiple film strips through one cutting action, thereby improving the film strip preparation efficiency. When in use, the number of film strips obtained through one cutting action can be set as the number of film strips required by one string of IBC battery strings, and one cutting action can meet the film strip laying requirement of one string of battery strings. The film strip spacing mechanism can space the multiple film strips obtained through cutting. When in use, the first predetermined value can be set as the distance between two adjacent film strips in one string of IBC battery strings, and the multiple film strips after spacing can be directly carried and laid at one time without the need for adjusting the film strip spacing again, thereby improving the battery string laying efficiency. Through the setting of the cutting bearing platform and the film strip spacing mechanism, the independence between film strip cutting and film strip spacing is realized. While the film strip spacing mechanism is spacing the last group of film strips, the cutting bearing platform and the film strip cutting mechanism can cut the next group of film strips, thereby further improving the film strip preparation efficiency.

[0013] In some embodiments, the film strip loading mechanism comprises a film strip roll, a film strip traction mechanism and a film strip pressing mechanism, wherein: the film strip traction mechanism is used to pull out the film strip on the film strip roll along the first horizontal direction and lay the film strip on the cutting bearing platform; the film strip pressing mechanism is arranged between the cutting bearing platform and the film strip roll, and the film strip pressing mechanism is used to press the pulled-out film strip.

[0014] Through the setting of the film strip roll, the feeding of the film strip to be cut is realized. Through the traction of the film strip traction mechanism, the film strip on the film strip roll can be pulled out along the first horizontal direction and laid on the cutting bearing platform. Through the pressing of the pulled-out film strip by the film strip pressing mechanism, the film strip can be prevented from deviating after the film strip traction mechanism releases the film strip, and the film strip traction mechanism can also conveniently clamp the film strip from the film strip pressing mechanism and pull out the film strip again.

[0015] In some embodiments, the film strip traction mechanism comprises a translation driving mechanism, a first lifting driving mechanism and a clamping mechanism, wherein: the clamping mechanism is connected to the driving end of the first lifting driving mechanism, the first lifting driving mechanism is connected to the driving end of the translation driving mechanism, the first lifting driving mechanism is used to drive the clamping mechanism to lift, and the translation driving mechanism is used to drive the clamping mechanism to reciprocate along the first horizontal direction; the clamping mechanism is used to clamp the end of the film strip from the film strip pressing mechanism and release the film strip after pulling out the film strip to a predetermined position.

[0016] Through the cooperation of the translation driving mechanism and the first lifting driving mechanism, the clamping mechanism can reciprocate between the film strip pressing mechanism and the cutting bearing platform, thereby clamping the end of the film strip from the film strip pressing mechanism and releasing the film strip after pulling out the film strip to a predetermined position, so that a film strip of a predetermined length is laid on the cutting bearing platform.

[0017] In some embodiments, the clamping mechanism comprises a traction base plate, a turnover driving mechanism and a traction clamping plate, wherein: the traction base plate and the turnover driving mechanism are connected to the driving end of the first lifting driving mechanism, and the traction clamping plate is connected to the driving end of the turnover driving mechanism and located above the traction base plate; the turnover driving mechanism is used to drive the traction clamping plate to turn towards or away from the traction base plate, so as to clamp or release the film strip.

[0018] A clamping mechanism with simple structure is provided, which drives the traction clamping plate to turn towards or away from the traction base plate by the turnover driving mechanism, so as to clamp or release the film strip.

[0019] In some embodiments, the film strip pressing mechanism comprises a pressure bearing table, a pressing plate, a pressing plate driving mechanism and a film strip bearing, wherein: the pressing plate is arranged above the pressure bearing table and connected to the driving end of the pressing plate driving mechanism, and the pressing plate driving mechanism is used to drive the pressing plate to lift, so that the film strip is pressed on the pressure bearing table when the pressing plate is lowered; the film strip bearing is connected to the pressure bearing table and close to the cutting bearing platform, the horizontal distance between the film strip bearing and the cutting bearing platform is adjustable, the film strip bearing is used to support the end of the film strip, and the film strip traction mechanism clamps the end of the film strip from the film strip bearing.

[0020] The film strip pressing mechanism realizes the pressing and releasing of the film strip by the cooperation of the pressure bearing table and the pressing plate, and the end of the film strip is supported by arranging the film strip bearing on the side of the pressure bearing table towards the cutting bearing platform, so as to prevent the end of the film strip from sagging and ensure that the film strip traction mechanism can clamp the end of the film strip smoothly.

[0021] In some embodiments, the film strip preparation mechanism further comprises a second lifting driving mechanism, the cutting bearing platform is connected to the driving end of the second lifting driving mechanism, and the second lifting driving mechanism is used to drive the cutting bearing platform to lift; a plurality of cutting slots extending along the second horizontal direction are arranged on the cutting bearing platform, the film strip cutting mechanism comprises a plurality of cutters or a plurality of hot cutting wires, the cutters or the hot cutting wires correspond to the cutting slots one by one, and the cutters or the hot cutting wires cut the film strip on the cutting bearing platform along the corresponding cutting slots; and the cutting bearing platform is further provided with suction holes for positioning the film strip.

[0022] The second lifting driving mechanism is arranged to drive the cutting bearing platform to lift, so that the film strip feeding mechanism can provide the film strip to the cutting bearing platform; the plurality of cutting slots extending along the second horizontal direction are arranged on the cutting bearing platform, so that the film strip cutting mechanism can cut the film strip along the cutting slots, and ensure that the film strip on the cutting bearing platform is cut into a plurality of film strips with predetermined width; and the suction holes are arranged on the cutting bearing platform to realize the adsorption and positioning of the film strip, and ensure that the film strip cutting mechanism can cut the film strip smoothly.

[0023] In some embodiments, the film strip carrying mechanism comprises a moving mechanism and a carrying assembly, wherein: the carrying assembly is connected to the driving end of the moving mechanism, the moving mechanism is used to drive the carrying assembly to switch between the cutting carrying platform and the film strip spacing mechanism, so that the carrying assembly carries multiple film strips from the cutting carrying platform to the film strip spacing mechanism; the carrying assembly is provided with multiple rows of adsorption holes, and each row of adsorption holes adsorbs one film strip.

[0024] The moving mechanism is used to drive the carrying assembly to switch between the cutting carrying platform and the film strip spacing mechanism, so that the carrying assembly can carry multiple film strips; and the carrying assembly is provided with multiple rows of adsorption holes, so that the carrying assembly can simultaneously adsorb multiple film strips, thereby achieving simultaneous carrying of multiple film strips.

[0025] In some embodiments, the carrying assembly comprises a first mounting bracket, a first spacing driving assembly, and multiple adsorption strips, each of which is provided with a row of adsorption holes, wherein: the first mounting bracket is connected to the driving end of the moving mechanism, and the first spacing driving assembly is arranged on the first mounting bracket; the multiple adsorption strips are arranged side by side and are respectively slidably connected to the first mounting bracket; the first spacing driving assembly is used to drive the multiple adsorption strips to move close to each other, so that each adsorption strip adsorbs one film strip on the cutting carrying platform; and the first spacing driving assembly is also used to drive the multiple adsorption strips to move away from each other, so that the spacing between the multiple adsorbed film strips is a second predetermined value, which is smaller than the first predetermined value.

[0026] The carrying assembly is provided in this way, so that the carrying assembly can simultaneously adsorb and carry multiple film strips, and the carrying assembly can also pre-space multiple film strips during the carrying process, so that the spacing between the multiple film strips is a second predetermined value. By pre-spacing multiple film strips, the distance between the film strips can be initially pulled apart, so that the film strip spacing mechanism can have a larger design space, which is more convenient for the structural design and manufacturing of the film strip spacing mechanism.

[0027] In some embodiments, the first mounting bracket comprises a frame and a guide arranged on the frame in the first horizontal direction; each adsorption strip is slidingly connected to the guide, and among the plurality of adsorption strips, the adsorption strip at the first end and the frame, and between two adjacent adsorption strips are connected by a distance separation connector, and the adsorption strip at the second end is connected to the driving end of the first distance separation driving assembly; or, among the plurality of adsorption strips, the adsorption strip at the first end is fixed on the frame, and the remaining adsorption strips are slidingly connected to the guide, and between two adjacent adsorption strips are connected by a distance separation connector, and the adsorption strip at the second end is connected to the driving end of the first distance separation driving assembly; among two adjacent adsorption strips, one of the adsorption strips is fixedly connected to one end of the distance separation connector, and the other adsorption strip is slidingly connected between the first limiting end and the second limiting end of the distance separation connector; the first distance separation driving assembly is used to drive the adsorption strip at the second end to reciprocate along the first horizontal direction, so as to realize the reciprocating movement of each adsorption strip between the first limiting end and the second limiting end of the corresponding distance separation connector; when the adsorption strip moves to the first limiting end, each adsorption strip approaches each other; when the adsorption strip moves to the second limiting end, each adsorption strip moves away from each other.

[0028] By setting the mounting mode and connection mode of each adsorption strip, only by driving one adsorption strip to reciprocate along the first horizontal direction by the first distance separation driving assembly, all adsorption strips can be driven to approach or separate from each other.

[0029] In some embodiments, the first distance separation driving assembly comprises a distance separation cylinder, a connecting plate, a distance separation pull rod, a pin shaft and a spring, wherein: the distance separation pull rod is slidingly connected to the guide and is close to the adsorption strip at the second end; the distance separation cylinder is arranged on the frame, one end of the connecting plate is connected to the telescopic rod of the distance separation cylinder, and the other end of the connecting plate is connected to the distance separation pull rod; one end of the pin shaft is provided with a limiting step, and the other end of the pin shaft is connected to the adsorption strip at the second end after penetrating through the distance separation pull rod; the spring is sleeved on the pin shaft, one end of the spring abuts against the distance separation pull rod, and the other end of the spring abuts against the limiting step; the distance separation cylinder is used to drive the distance separation pull rod to reciprocate along the first horizontal direction.

[0030] By setting the distance separation pull rod, the distance separation cylinder is not directly connected to the adsorption strip, which can prevent the distance separation cylinder from being damaged by too large stroke, and after the distance separation of the adsorption strip is completed, if the distance separation cylinder still has a stroke, the distance separation cylinder drives the distance separation pull rod to move along the pin shaft to compress the spring, so as to consume the remaining stroke of the distance separation cylinder.

[0031] In some embodiments, the membrane strip distance separation mechanism comprises a second mounting bracket, a second distance separation driving assembly and a plurality of distance separation tables, wherein: the plurality of distance separation tables are slidingly connected side by side on the second mounting bracket, and each distance separation table is used to carry one membrane strip; the second distance separation driving assembly is used to drive the plurality of distance separation tables to slide apart, so that the distance between the plurality of membrane strips is a first predetermined value.

[0032] The plurality of sub-distance tables are driven to slide apart along the second mounting bracket by the second sub-distance driving assembly, so that the sub-distance of the plurality of sub-distance tables is realized, and the distance between the plurality of film strips carried on the plurality of sub-distance tables is the first predetermined value.

[0033] In some embodiments, the second sub-distance driving assembly comprises a pulling part and a sub-distance belt, wherein: the pulling part is arranged on the second mounting bracket; the first end of the sub-distance belt is connected to the second mounting bracket, and the plurality of sub-distance tables are connected to the sub-distance belt, wherein the length of the sub-distance belt between each adjacent sub-distance table is equal; the driving end of the pulling part is connected to the sub-distance table close to the second end of the sub-distance belt, and the pulling part is used to drive the sub-distance table close to the second end of the sub-distance belt to slide away from the first end of the sub-distance belt to tighten the sub-distance belt; when the sub-distance belt is tightened, the distance between the plurality of film strips carried on the plurality of sub-distance tables is the first predetermined value.

[0034] A second sub-distance driving assembly with simple structure is provided, which only needs to pull and tighten the sub-distance belt by the pulling part, and can realize the sub-distance of the plurality of sub-distance tables connected to the sub-distance belt, and finally adjust the distance between the plurality of film strips carried on the plurality of sub-distance tables to the first predetermined value.

[0035] The application also provides a string welding machine, which comprises the film strip preparation mechanism, the welding strip feeding mechanism, the battery piece feeding mechanism, the carrying mechanism, the conveying mechanism and the stringing mechanism according to any one of the above.

[0036] The film strip preparation mechanism is used to provide film strips, the welding strip feeding mechanism is used to provide welding strip groups, and the battery piece feeding mechanism is used to provide battery pieces, wherein the battery pieces are IBC battery pieces.

[0037] The carrying mechanism is used to lay the N+1 film strips provided by the film strip preparation mechanism, the N+1 welding strip groups provided by the welding strip feeding mechanism and the N battery pieces provided by the battery piece feeding mechanism on the conveying mechanism according to a predetermined stringing rule.

[0038] The conveying mechanism conveys the laid film strips, welding strips and battery pieces to the stringing mechanism, and the stringing mechanism is used to weld the film strips, welding strips and battery pieces into a battery string.

[0039] Through the cooperation of the film strip preparation mechanism, the welding strip feeding mechanism, the battery piece feeding mechanism, the carrying mechanism, the conveying mechanism and the stringing mechanism, the string welding machine realizes the automatic welding of IBC battery pieces into a string.

[0040] In some embodiments, the stringing rule is: laying N+1 groups of solder strips and N+1 film strips, each film strip is stacked above the corresponding solder strip group; N battery pieces are stacked on the N+1 groups of solder strips with the back of each battery piece facing down, and one battery piece is stacked between each two adjacent film strips; or, the stringing rule is: laying N battery pieces on the conveying mechanism with the back of each battery piece facing up; laying N+1 film strips and N+1 groups of solder strips, one film strip is laid between each two adjacent battery pieces, on the outer side of the first battery piece, and on the outer side of the Nth battery piece, and the N+1 groups of solder strips are laid above the N battery pieces and the N+1 film strips.

[0041] Two feasible stringing modes are provided, and both of them can implement stringing of IBC battery strings. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A structure schematic diagram of a film strip preparation mechanism in the embodiment of the present application from one perspective;

[0043] Figure 2 A structure schematic diagram of a film strip preparation mechanism in the embodiment of the present application from another perspective;

[0044] Figure 3 A structure schematic diagram of a film strip preparation mechanism in the embodiment of the present application after removing components such as a film strip cutting mechanism and a film strip spacing mechanism;

[0045] Figure 4 A structure schematic diagram of a film strip cutting mechanism in the embodiment of the present application; Figure 3

[0046] Figure 5 A structure schematic diagram of a film strip spacing mechanism in the embodiment of the present application;

[0047] Figure 6 A structure schematic diagram of a film strip spacing mechanism in the embodiment of the present application;

[0048] Figure 7 A structure schematic diagram of a film strip spacing mechanism in the embodiment of the present application;

[0049] Figure 8 A structure schematic diagram of a film strip spacing mechanism in the embodiment of the present application;

[0050] Figure 9 A structure schematic diagram of a film strip spacing mechanism in the embodiment of the present application;

[0051] Figure 10 A structure schematic diagram of a film strip spacing mechanism in the embodiment of the present application;

[0052] Figure 11 A structure schematic diagram of a film strip spacing mechanism in the embodiment of the present application; ​

[0053] Figure 12 Structure schematic view of the laid IBC battery string in the embodiment of the present application;

[0054] Figures 1 to 12 Comprise:

[0055] Film strip roll 1;

[0056] Film strip traction mechanism 2:

[0057] Translation driving mechanism 21;

[0058] First lifting driving mechanism 22;

[0059] Clamping mechanism 23: traction bottom plate 231, turnover driving mechanism 232, traction clamping plate 233;

[0060] Film strip pressing mechanism 3:

[0061] Pressure receiving table 31, pressing plate 32, pressing plate driving mechanism 33, film strip carrier 34, waist hole 35;

[0062] Cutting carrying platform 4: avoidance groove 41; second lifting driving mechanism 42;

[0063] Film strip cutting mechanism 5:

[0064] Cutting driving mechanism 51;

[0065] Cutting assembly 52: rotary driving assembly 521, rotary cutter shaft 522, cutting knife 523;

[0066] Film strip pressing plate 53;

[0067] Film strip carrying mechanism 6:

[0068] Moving mechanism 61;

[0069] Carrying assembly 62: first mounting bracket 621, first distance driving assembly 622, adsorbing strip 623, frame 624, guide 625, distance connecting piece 626, distance cylinder 627, connecting plate 628, distance pull rod 629, pin shaft 6210, spring 6211;

[0070] Film strip distance mechanism 7:

[0071] Second mounting bracket 71;

[0072] Second distance driving assembly 72: traction part 721, distance belt 722;

[0073] Distance table 73;

[0074] Battery piece 100, film strip 200, solder strip 300. DETAILED DESCRIPTION

[0075] In order to make the above objects, features and advantages of the present application more apparent, further specific embodiments will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0076] As shown in Figure 1 and Figure 2 , the film strip preparation mechanism provided by the present application comprises a film strip feeding mechanism, a cutting bearing platform 4, a film strip cutting mechanism 5, a film strip conveying mechanism 6 and a film strip spacing mechanism 7, wherein:

[0077] The film strip feeding mechanism is arranged in front of the cutting bearing platform 4, and is used to provide the film strip to be cut to the cutting bearing platform 4 along a first horizontal direction (such as the X-axis direction in Figure 1 ).

[0078] The cutting bearing platform 4 is used to position the film strip provided by the film strip feeding mechanism.

[0079] The film strip cutting mechanism 5 is used to cut the film strip on the cutting bearing platform 4 along a second horizontal direction (such as the Y-axis direction in Figure 1 ) perpendicular to the first horizontal direction, so as to obtain a plurality of film strips.

[0080] The film strip conveying mechanism 6 is used to pick up the plurality of film strips from the cutting bearing platform 4 and convey the picked-up plurality of film strips to the film strip spacing mechanism 7.

[0081] The film strip spacing mechanism 7 is used to space the plurality of film strips, so that the spacing between the plurality of film strips is a first predetermined value.

[0082] It can be seen that the film strip preparation mechanism of the present application can obtain a plurality of film strips by performing a cutting action once, thereby improving the film strip preparation efficiency. In use, the number of film strips obtained by each cutting can be set as the number of film strips required for one string of IBC battery strings, and one cutting can meet the film strip laying requirement of one string of battery strings.

[0083] The film strip spacing mechanism 7 can space the plurality of film strips obtained by cutting. In use, the first predetermined value can be set as the distance between two adjacent film strips in one string of IBC battery strings, and the spaced plurality of film strips can be directly conveyed and laid at one time without the need for adjusting the film strip spacing again, thereby improving the battery string laying efficiency. In addition, by arranging the cutting bearing platform 4 and the film strip spacing mechanism 7, the independence between the film strip cutting and the film strip spacing is realized. While the film strip spacing mechanism 7 is spacing the last group of film strips, the cutting bearing platform 4 and the film strip cutting mechanism 5 can cut the next group of film strips, thereby further improving the film strip preparation efficiency.

[0084] With reference to Figure 1As shown, the film strip feeding mechanism comprises a film strip roll 1, a film strip traction mechanism 2 and a film strip pressing mechanism 3, wherein: the film strip traction mechanism 2 is used to pull the film strip on the film strip roll 1 out along a first horizontal direction, and lay the film strip on a cutting bearing platform 4. The film strip pressing mechanism 3 is arranged between the cutting bearing platform 4 and the film strip roll 1, and is used to press the pulled-out film strip.

[0085] The feeding process of the film strip feeding mechanism is as follows:

[0086] After the film strip roll 1 is installed, the end of the film strip pulled out from the film strip roll 1 is pulled into the film strip pressing mechanism 3, and the film strip pressing mechanism 3 presses the end of the film strip.

[0087] Then, the film strip traction mechanism 2 clamps the end of the film strip from the film strip pressing mechanism 3, and at the same time, the film strip pressing mechanism 3 releases the film strip. The film strip traction mechanism 2 pulls a predetermined length of the film strip to be cut above the cutting bearing platform 4, the film strip pressing mechanism 3 presses the film strip again, the film strip traction mechanism 2 releases the film strip, and the cutting bearing platform 4 positions the film strip to be cut.

[0088] Subsequently, the film strip cutting mechanism 5 cuts the film strip to be cut positioned on the cutting bearing platform 4 into a plurality of film strips. The end of the cut film strip is pressed and held on the film strip pressing mechanism 3.

[0089] After the film strip conveying mechanism removes the plurality of film strips, the film strip traction mechanism 2 clamps the end of the film strip from the film strip pressing mechanism 3 again, and starts to implement the cutting of the next group of film strips.

[0090] As shown in Figure 3 and Figure 5 Optionally, the film strip traction mechanism 2 comprises a translation driving mechanism 21, a first lifting driving mechanism 22 and a clamping mechanism 23, wherein: the clamping mechanism 23 is connected to the driving end 23 of the first lifting driving mechanism, the first lifting driving mechanism 23 is connected to the driving end of the translation driving mechanism 22, the first lifting driving mechanism 22 is used to drive the clamping mechanism 23 to lift, and the translation driving mechanism 21 is used to drive the clamping mechanism 23 to reciprocate along the first horizontal direction.

[0091] Under the cooperation of the translation driving mechanism 21 and the first lifting driving mechanism 22, the clamping mechanism 23 clamps the end of the film strip from the film strip pressing mechanism 3, and releases the film strip after pulling it to a predetermined position, so that the film strip finally falls on the cutting bearing platform 4 and is positioned by the cutting bearing platform 4.

[0092] The translation driving mechanism 21 and the first lifting driving mechanism 22 can all adopt various types of existing linear driving mechanisms, such as a linear driving mechanism composed of a motor, a synchronous belt and a slide rail pair.

[0093] As shown inFigure 5 As shown, optionally, the clamping mechanism 23 includes a traction base plate 231, a tilting drive mechanism 232, and a traction clamping plate 233, wherein: the traction base plate 231 and the tilting drive mechanism 232 are both connected to the drive end of the first lifting drive mechanism 22, and the traction clamping plate 233 is connected to the drive end of the tilting drive mechanism 232 and located above the traction base plate 231. The tilting drive mechanism 232 is used to drive the traction clamping plate 233 to tilt toward or away from the traction base plate 231 to clamp or release the membrane strip.

[0094] As can be seen, by driving the traction clamping plate 233 to flip toward or away from the traction base plate 231 through the flipping drive mechanism 232, the clamping mechanism 23 can perform clamping or releasing of the membrane strip.

[0095] Of course, other more complex gripping mechanisms can also be used to grip or release multiple membrane strips. For example, in some other alternative embodiments, the gripping mechanism 23 includes multiple gripper assemblies arranged side by side, which together grip or release the membrane strips.

[0096] like Figure 4 As shown, optionally, the membrane belt pressing mechanism 3 includes a pressure platform 31, a pressure plate 32, and a pressure plate driving mechanism 33. The pressure plate 32 is positioned above the pressure platform 31 and connected to the driving end of the pressure plate driving mechanism 33. The pressure plate driving mechanism 33 drives the pressure plate 31 to move up and down. The membrane belt passes between the pressure platform 31 and the pressure plate 32. When the pressure plate driving mechanism 33 drives the pressure plate 32 to descend, the pressure plate 32 presses the membrane belt against the pressure platform 31. When the pressure plate driving mechanism 33 drives the pressure plate 32 to rise, the pressure plate 32 releases the membrane belt.

[0097] The membrane belt pressing mechanism 3 also includes a membrane belt support member 34 connected to the pressure table 31 and close to the cutting support platform 4. The membrane belt support member 34 is used to support the end of the membrane belt, prevent the end of the membrane belt from sagging, and ultimately ensure that the membrane belt traction mechanism 2 can smoothly clamp the end of the membrane belt from the membrane belt support member 34.

[0098] Optionally, the horizontal distance between the film belt carrier 34 and the cutting carrier platform 4 is adjustable, thereby adjusting the amount of film belt end held by the film belt traction mechanism 2. Optionally, the film belt carrier 34 includes a carrier plate with a waist hole 35 on one side. The carrier plate is connected to the pressure table 31 by screws installed in the waist hole 35. By adjusting the position of the screws in the waist hole 35, the horizontal distance between the carrier plate and the cutting carrier platform 4 can be adjusted.

[0099] Optionally, the film strip preparation mechanism in this embodiment further includes a second lifting drive mechanism 42, and the cutting support platform 4 is connected to the drive end of the second lifting drive mechanism 42. The second lifting drive mechanism 42 is used to drive the cutting support platform 4 to lift.

[0100] By setting the second lifting driving mechanism 42, the lifting switching between the cutting high position and the avoiding low position of the cutting bearing platform 4 is realized. When the cutting bearing platform 4 is lowered to the avoiding low position, it can avoid the film strip traction mechanism 2, so that the film strip traction mechanism 2 can smoothly clamp the end of the film strip from the film strip pressing mechanism 3. When the cutting bearing platform 4 is raised to the cutting high position, it can implement the bearing and positioning of the film strip to be cut which is pulled to the position, and cooperate with the film strip cutting mechanism 5 to complete the cutting of the film strip.

[0101] Optionally, the cutting bearing platform 4, the film strip traction mechanism 2, the film strip pressing mechanism 3 and the film strip cutting mechanism 5 implement the traction and cutting of the film strip in the following process:

[0102] Firstly, the cutting bearing platform 4 is lowered to the avoiding low position from the initial cutting high position under the driving of the second lifting driving mechanism 42. The clamping mechanism 23 of the film strip traction mechanism 2 moves to the film strip bearing 34 and clamps the end of the film strip, and then the film strip pressing mechanism 3 releases the film strip.

[0103] Then, the clamping mechanism 23 rises to avoid the cutting bearing platform 4, and the cutting bearing platform 4 is raised to the cutting high position under the driving of the second lifting driving mechanism 42.

[0104] The clamping mechanism 23 pulls the film strip until the predetermined length of the film strip to be cut is pulled to the predetermined position. After the film strip is pressed again by the film strip pressing mechanism 3, the clamping mechanism 23 releases the film strip, so that the film strip to be cut falls on the bearing platform 4 and is positioned by the bearing platform 4.

[0105] Finally, the film strip to be cut positioned on the cutting bearing platform 4 is cut into multiple film strips by the film strip cutting mechanism 5.

[0106] Optionally, as shown in Figure 4 , the cutting bearing platform 4 is provided with multiple cutting seams 41 extending along the second horizontal direction, and the film strip cutting mechanism 5 includes multiple cutters or multiple hot cutting wires. The cutters or hot cutting wires correspond to the cutting seams 41 one by one, and cut the film strip on the cutting bearing platform 41 along the corresponding cutting seam 41, so as to cut the film strip into multiple film strips. The cutting bearing platform 4 is also provided with adsorption holes for adsorbing the film strip to position the film strip.

[0107] As shown in Figure 6As shown, the film strip carrying mechanism 6 comprises a moving mechanism 61 and a carrying assembly 62. The carrying assembly 62 is connected to the driving end of the moving mechanism 61. The moving mechanism 61 is configured to drive the carrying assembly 62 to move between the cutting support platform 4 and the film strip spacing mechanism 7, so that the carrying assembly 62 carries the plurality of film strips from the cutting support platform 4 to the film strip spacing mechanism 7. The carrying assembly 62 is provided with a plurality of rows of suction holes, each of which is configured to correspondingly suction one film strip.

[0108] As shown in Figure 7 and Figure 8 As shown, the carrying assembly 62 comprises a first mounting bracket 621, a first spacing driving assembly 622, and a plurality of suction strips 623. Each of the suction strips 623 is provided with a row of suction holes, and each of the suction strips 623 is configured to correspondingly suction one film strip through the row of suction holes. The first mounting bracket 621 is connected to the driving end of the moving mechanism 61, and the first spacing driving assembly 622 is arranged on the first mounting bracket 621. The plurality of suction strips 623 are arranged side by side and are respectively slidably connected to the first mounting bracket 621.

[0109] The gap between the plurality of film strips obtained by cutting on the cutting support platform 4 is small. Therefore, before picking up the plurality of film strips from the cutting support platform 4, the first spacing driving assembly 622 drives the plurality of suction strips 623 to move close to each other, so that each of the suction strips can correspondingly suction one film strip on the cutting support platform 4. During the carrying process, the first spacing driving assembly 622 drives the plurality of suction strips 623 to move away from each other, so that the spacing between the plurality of suctioned film strips is adjusted to a second predetermined value, which is smaller than the first predetermined value.

[0110] It can be seen that, by arranging the carrying assembly 62, the carrying assembly 62 can simultaneously implement suction and carrying of the plurality of film strips. In addition, the carrying assembly 62 can implement pre-spacing of the plurality of film strips during the carrying process, so that the spacing between the plurality of film strips is adjusted to the second predetermined value. In this way, by pre-spacing the plurality of film strips, the distance between the film strips can be initially pulled apart, so that the film strip spacing mechanism 7 can have a larger design space, and the structure design and manufacturing of the film strip spacing mechanism 7 are more convenient.

[0111] Continuing to refer to Figure 7 and Figure 8 As shown, the first mounting bracket 61 comprises a frame 624 and a guide 625 arranged on the frame 624 in the first horizontal direction. The guide 625 can be, for example, two groups of oppositely arranged guide rods as shown in the figure, or can be a guide rail or other structures.

[0112] Figure 7 and Figure 8In the embodiment, the adsorption strips 623 at the first end (e.g. the right end) are fixed on the frame 624, and the rest of the adsorption strips 623 are slidingly connected to the guide 625. The adjacent two adsorption strips 623 are connected by the distance connection piece 626, and the adsorption strip 623 at the second end (e.g. the left end) is connected to the driving end of the first distance driving assembly 622.

[0113] In other optional embodiments, each adsorption strip 623 can be slidingly connected to the guide 625. The adsorption strips 623 at the first end (e.g. the right end) are connected between the frame 624 and the distance connection piece 626, and the adjacent two adsorption strips 623 are connected by the distance connection piece 626. The adsorption strip 623 at the second end (e.g. the left end) is connected to the driving end of the first distance driving assembly 622.

[0114] In the adjacent two adsorption strips 623, one of the adsorption strips 623 is fixedly connected to one end of the distance connection piece 626, and the other adsorption strip 623 is slidingly connected between the first limiting end and the second limiting end of the distance connection piece 626.

[0115] The first distance driving assembly 622 is used to drive the adsorption strip 623 at the second end (e.g. the left end) to reciprocate along the first horizontal direction, so as to realize the reciprocating movement of each adsorption strip 623 between the first limiting end and the second limiting end of the corresponding distance connection piece 626. When the adsorption strip 623 moves to the first limiting end, each adsorption strip 623 is close to each other. When the adsorption strip 623 moves to the second limiting end, each adsorption strip 623 is away from each other.

[0116] Figure 7 And Figure 8 In the embodiment, the distance connection piece 626 is a connecting block, and the connecting block is provided with a waist-shaped hole extending along the first horizontal direction. In the adjacent two adsorption strips 623, one of the adsorption strips 623 is fixedly connected to one end of the connecting block, and the other adsorption strip 623 is provided with a connecting pin which is inserted into the waist-shaped hole and can slide in the waist-shaped hole. That is, the two ends of the waist-shaped hole constitute the first limiting end and the second limiting end of the connecting block.

[0117] Continuing to refer to Figure 7 And Figure 8As shown, optionally, the first distance driving assembly 622 comprises a distance cylinder 627, a connecting plate 628, a distance pull rod 629, a pin shaft 6210 and a spring 6211. The distance pull rod 629 is slidingly connected to the guide 625 and is close to the adsorption strip 623 at the second end. The distance cylinder 627 is arranged on the frame 624. One end of the connecting plate 628 is connected to the telescopic rod of the distance cylinder 627, and the other end of the connecting plate 628 is connected to the distance pull rod 629. One end of the pin shaft 6210 is provided with a limiting step, and the other end of the pin shaft 6210 is connected to the adsorption strip 623 at the second end after penetrating through the distance pull rod 629. The spring 6211 is sleeved on the pin shaft 6210, one end of the spring 6211 abuts against the distance pull rod 629, and the other end of the spring 6211 abuts against the limiting step. The distance cylinder 627 is used to drive the distance pull rod 629 to reciprocate along the first horizontal direction, so as to drive the adsorption strips 623 to move close to or away from each other.

[0118] By arranging the distance pull rod 629, the distance cylinder 627 is not directly connected to the adsorption strip 623, so that the distance cylinder 627 can be prevented from being damaged by too large stroke. After the adsorption strips 623 are separated to the position, if the distance cylinder 627 still has stroke, the distance cylinder 627 can drive the distance pull rod 629 to move along the pin shaft 6210 to compress the spring 6211, so as to digest the remaining stroke of the distance cylinder 627.

[0119] As shown, Figure 9 Optionally, the film strip cutting mechanism 5 in the embodiment of the application comprises a cutting driving mechanism 51 and a cutting assembly 52. The cutting assembly 52 is connected to the driving end of the cutting driving mechanism 51. The cutting driving mechanism 51 drives the cutting assembly 52 to move, so that the cutting assembly 52 abuts against the cutting bearing platform 4 and cuts the film strip.

[0120] Optionally, the cutting driving mechanism 51 comprises a cutting lifting mechanism and a cutting translation mechanism. The cutting assembly 52 comprises a rotary driving assembly 521, a rotary knife shaft 522 and a plurality of cutting knives 523. Specifically, the cutting translation mechanism is connected to the driving end of the cutting lifting mechanism. The rotary driving assembly 521 is connected to the driving end of the cutting translation mechanism. The rotary knife shaft 522 is connected to the driving end of the rotary driving assembly 521 and extends along the first horizontal direction. The plurality of cutting knives 523 are arranged on the rotary knife shaft 522 at intervals.

[0121] The cutting process of the film strip cutting mechanism 5 on the film strip is as follows:

[0122] After the film strip is positioned on the cutting bearing platform 4, the cutting translation mechanism drives the plurality of cutting knives 523 to translate to the first end of the cutting bearing platform 4. The cutting lifting mechanism drives the plurality of cutting knives 523 to descend to the low position, so that the plurality of cutting knives 523 are pressed against one end of the film strip and are located at the corresponding cutting gaps.

[0123] Next, the cutting and translation mechanism drives multiple cutters 523 to move from the first end of the cutting support platform 4 to the second end of the cutting support platform 4. Simultaneously, the rotation drive assembly 521 drives the rotating cutter shaft 522 to rotate, thereby driving the multiple cutters 523 to rotate at high speed. The film strip is cut into multiple film strips by the multiple cutters 523.

[0124] Of course, the cutting assembly 52 can also adopt other cutting structures, such as the cutting assembly 52 including multiple taut metal wires extending along the second horizontal direction, and a heating assembly for heating the metal wires. After the film strip is positioned on the cutting support platform 4, the cutting drive mechanism 51 drives each heated metal wire to above the film strip, and then drives each metal wire to descend and contact the film strip to cut the film strip into several film strips.

[0125] Optionally, the film strip cutting mechanism 5 also includes a film strip pressing plate 53 disposed below the cutting assembly 52. ​​The film strip pressing plate 53 is used to press the film strip onto the cutting support platform 4 before the cutting assembly 52 cuts the film strip. By pressing the film strip with the film strip pressing plate 53, displacement of the film strip during the cutting process can be further prevented, thereby ensuring that the edges of the cut film strip are neat. Optionally, the film strip pressing plate 53 is provided with multiple cutting slits for multiple cutters 523 or metal wires to pass through.

[0126] like Figures 10 to 11 As shown, optionally, the membrane strip splitting mechanism 7 includes a second mounting bracket 71, a second splitting drive assembly 72, and a plurality of splitting platforms 73, wherein: the plurality of splitting platforms 73 are slidably connected side-by-side to the second mounting bracket 71, for example, the second mounting bracket 71 is provided with a slide rail, and the plurality of splitting platforms 73 are slidably connected to the slide rail. Each splitting platform 73 is used to support one membrane strip. The second splitting drive assembly 72 is used to drive the plurality of splitting platforms 73 to slide apart, so that the spacing between the plurality of membrane strips is a first predetermined value.

[0127] As described in the previous embodiments, since the transport mechanism 6 has pre-splitting the multiple membrane strips during the transport process, the spacing between the multiple membrane strips is adjusted to a second predetermined value. Thus, the separation tables 73 in the membrane strip separation mechanism 7 do not need to be made particularly narrow, thereby facilitating the manufacturing of the separation tables 73.

[0128] Optionally, the second pitch drive assembly 72 includes a tensioning part 721 and a pitch belt 722, wherein: the tensioning part 721 is disposed on the second mounting bracket 71. The first end (such as the right end) of the pitch belt 722 is connected to the second mounting bracket 71, and a plurality of pitching platforms 73 are all connected to the pitch belt 722, wherein the length of the pitch belt between each adjacent pitching platform 73 is equal.

[0129] The driving end of the tensioning section 721 is connected to the spacing platform 73 near the second end (e.g., the left end) of the spacing belt 722. The tensioning section 721 is used to drive the spacing platform 73 near the second end of the spacing belt 722 to slide away from the first end of the spacing belt, so as to tighten the spacing belt. When the spacing belt is tightened, the spacing between the multiple membrane strips supported on the multiple spacing platforms 73 is adjusted to a first predetermined value.

[0130] After the multiple membrane strips separated by the separating table 73 are removed, the pulling part 721 is also used to drive the separating table 73 near the second end of the separating belt 722 to slide toward the first end of the separating belt, so that the separating tables 73 move closer to each other to receive the next set of membrane strips.

[0131] The pulling part 721 can be any existing drive mechanism capable of driving the spacing table 73 to slide along the second mounting bracket 71. For example, the pulling part 721 includes a timing belt mounted on the second mounting bracket 71, with an adapter plate on the belt body. The adapter plate is connected to the spacing table 73 near the second end (e.g., the left end) of the spacing belt 722, and the timing belt drives the spacing table 73 to slide when it rotates.

[0132] This application also provides a stringing machine, which includes the film strip preparation mechanism, the welding ribbon feeding mechanism, the battery cell feeding mechanism, the handling mechanism, the conveying mechanism, and the stringing mechanism provided in any of the above embodiments, wherein:

[0133] The membrane strip preparation mechanism is used to provide membrane strips, the welding ribbon feeding mechanism is used to provide welding ribbon sets, and the cell feeding mechanism is used to provide cells, which are IBC cells.

[0134] The conveying mechanism is used to lay N+1 membrane strips provided by the membrane strip preparation mechanism, N+1 welding ribbon groups provided by the welding ribbon feeding mechanism, and N battery cells provided by the battery cell feeding mechanism on the conveying mechanism according to a predetermined stringing rule.

[0135] The conveying mechanism transports the laid-out membrane strips, welding ribbons, and battery cells to the stringing mechanism, which is used to weld the membrane strips, welding ribbons, and battery cells into battery strings.

[0136] As can be seen, through the cooperation of the membrane strip preparation mechanism, the welding strip feeding mechanism, the cell feeding mechanism, the handling mechanism, the conveying mechanism and the stringing mechanism, the string welding machine of this application realizes the automatic stringing of IBC cells.

[0137] The string arrangement rules in an IBC battery string can include, for example, the following two implementation methods:

[0138] Implementation Method 1:

[0139] Step 1: Lay out N+1 sets of welding ribbons and N+1 membrane strips, with each membrane strip stacked on top of its corresponding welding ribbon set.

[0140] Specifically, the transport mechanism can first pick up N+1 sets of welding strips from the welding strip feeding mechanism, and then lay the N+1 sets of welding strips on the conveying mechanism; the transport mechanism then picks up N+1 membrane strips from the membrane strip preparation mechanism, and then stacks the N+1 membrane strips on top of the corresponding welding strip sets. Alternatively, the transport mechanism can pick up N+1 membrane strips from the membrane strip preparation mechanism, and then pick up N+1 sets of welding strips from the welding strip feeding mechanism, ensuring that the picked-up membrane strips are all located on top of the corresponding welding strip sets. Then, the transport mechanism lays the picked-up N+1 membrane strips and N+1 sets of welding strips on the conveying mechanism.

[0141] Step 2: Stack N battery cells face down on N+1 sets of welding strips, with one battery cell stacked between each two adjacent film strips.

[0142] Implementation Method 2:

[0143] refer to Figure 12 As shown, the string arrangement rules in this embodiment are as follows:

[0144] Step 1: Place N battery cells 100 face down onto the conveyor mechanism.

[0145] Figure 12 In this embodiment, N=11, meaning that the IBC battery string to be assembled consists of 11 battery cells welded together.

[0146] Step 2: Lay out N+1 film strips 200 and N+1 sets of welding ribbons 300. Among them, one film strip 200 is laid between each adjacent battery cell 100, on the outside of the first battery cell 100, and on the outside of the Nth battery cell 100. The N+1 sets of welding ribbons 300 are laid on top of the N battery cells 100 and the N+1 film strips 200.

[0147] Specifically, the transport mechanism can first pick up N+1 film strips from the film strip preparation mechanism, then stack the N+1 film strips at the corresponding cell spacing and on the outer side. Next, the transport mechanism picks up N+1 sets of solder ribbons from the solder ribbon feeding mechanism, and then lays the N+1 sets of solder ribbons on the cell. Alternatively, the transport mechanism can pick up N+1 sets of solder ribbons from the solder ribbon feeding mechanism, then pick up N+1 film strips from the film strip preparation mechanism, ensuring that the picked-up film strips are all located below the corresponding solder ribbon sets. Then, the transport mechanism lays the picked-up N+1 film strips and N+1 sets of solder ribbons onto the cell.

[0148] The foregoing has provided a sufficiently detailed and specific description of this application. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within the protection scope of this application. The scope of protection claimed in this application is defined by the claims, not by the above descriptions in the embodiments. Furthermore, the embodiments mentioned in this application are not limited to a single implementation; some embodiments can also be combined.

Claims

1. A membrane strip preparation mechanism, characterized in that, The membrane strip preparation mechanism includes a membrane strip feeding mechanism, a cutting and carrying platform, a membrane strip cutting mechanism, a membrane strip transport mechanism, and a membrane strip spacing mechanism, wherein: The film strip feeding mechanism is located in front of the cutting support platform, and the film strip feeding mechanism is used to provide the film strip to be cut to the cutting support platform along the first horizontal direction; The cutting and bearing platform is used to position the film belt provided by the film belt feeding mechanism; The membrane strip cutting mechanism is used to cut the membrane strip located on the cutting support platform along a second horizontal direction perpendicular to the first horizontal direction to obtain multiple membrane strips; The membrane strip transport mechanism is used to pick up multiple membrane strips from the cutting and bearing platform and transport the picked-up multiple membrane strips to the membrane strip splitting mechanism; The membrane strip splitting mechanism is used to split multiple membrane strips such that the spacing between the multiple membrane strips is a first predetermined value; While the membrane strip splitting mechanism splits the previous set of membrane strips, the cutting support platform and the membrane strip cutting mechanism can cut the next set of membrane strips. The membrane strip transport mechanism includes a moving mechanism and transport components; The transport component is provided with multiple rows of adsorption holes, and each row of adsorption holes adsorbs one membrane strip. The conveying assembly includes a first mounting bracket, a first spacing drive assembly, and multiple adsorption strips, each of which has a row of adsorption holes. The first mounting bracket is connected to the drive end of the moving mechanism, and the first pitch drive assembly is disposed on the first mounting bracket; Multiple adsorption strips are arranged side by side and slidably connected to the first mounting bracket; The first spacing driving component is used to drive the plurality of adsorption strips to move closer to each other, so that each adsorption strip adsorbs one of the film strips on the cutting support platform; the first spacing driving component is also used to drive the plurality of adsorption strips to move further apart from each other, so that the spacing between the adsorbed plurality of film strips is a second predetermined value, the second predetermined value being less than the first predetermined value.

2. The membrane strip preparation mechanism as described in claim 1, characterized in that, The membrane belt feeding mechanism includes a membrane belt roll, a membrane belt traction mechanism, and a membrane belt pressing mechanism, wherein: The film strip traction mechanism is used to pull the film strip on the film strip roll out along the first horizontal direction and lay the film strip onto the cutting and bearing platform; The film tape pressing mechanism is disposed between the cutting and bearing platform and the film tape roll, and the film tape pressing mechanism is used to press the pulled-out film tape.

3. The membrane strip preparation mechanism as described in claim 2, characterized in that, The membrane belt traction mechanism includes a translation drive mechanism, a first lifting drive mechanism, and a clamping mechanism, wherein: The clamping mechanism is connected to the drive end of the first lifting drive mechanism, and the first lifting drive mechanism is connected to the drive end of the translation drive mechanism. The first lifting drive mechanism is used to drive the clamping mechanism to lift and lower, and the translation drive mechanism is used to drive the clamping mechanism to reciprocate and translate along the first horizontal direction. The clamping mechanism is used to clamp the end of the membrane tape from the membrane tape pressing mechanism and release the membrane tape after pulling it out to a predetermined position.

4. The membrane strip preparation mechanism as described in claim 3, characterized in that, The clamping mechanism includes a traction base plate, a tilting drive mechanism, and a traction clamping plate, wherein: The traction base plate and the tilting drive mechanism are both connected to the drive end of the first lifting drive mechanism, and the traction clamp is connected to the drive end of the tilting drive mechanism and located above the traction base plate. The flipping drive mechanism is used to drive the traction clamp to flip toward or away from the traction base plate in order to clamp or release the membrane strip.

5. The membrane strip preparation mechanism as described in claim 2, characterized in that, The membrane belt pressing mechanism includes a pressure platform, a pressure plate, a pressure plate driving mechanism, and a membrane belt carrier, wherein: The pressure plate is positioned above the pressure support platform and connected to the drive end of the pressure plate driving mechanism. The pressure plate driving mechanism is used to drive the pressure plate to rise and fall. When the pressure plate descends, it presses the membrane belt tightly onto the pressure support platform. The membrane belt carrier is connected to the pressure platform and close to the cutting support platform. The horizontal distance between the membrane belt carrier and the cutting support platform is adjustable. The membrane belt carrier is used to support the end of the membrane belt. The membrane belt traction mechanism clamps the end of the membrane belt from the membrane belt carrier.

6. The membrane strip preparation mechanism as described in claim 1 or 2, characterized in that, The film strip preparation mechanism further includes a second lifting drive mechanism, and the cutting support platform is connected to the drive end of the second lifting drive mechanism. The second lifting drive mechanism is used to drive the cutting support platform to lift. The cutting support platform is provided with multiple cutting seams extending along the second horizontal direction. The film strip cutting mechanism includes multiple cutters or multiple thermal cutting wires. Each cutter or thermal cutting wire corresponds to one of the cutting seams. The cutter or thermal cutting wire cuts the film strip located on the cutting support platform along the corresponding cutting seam. The cutting and supporting platform is also provided with adsorption holes for positioning the membrane strip.

7. The membrane strip preparation mechanism as described in claim 1, characterized in that: The transport component is connected to the drive end of the moving mechanism. The moving mechanism is used to drive the transport component to move and switch between the cutting and carrying platform and the film strip splitting mechanism, so that the transport component transports multiple film strips from the cutting and carrying platform to the film strip splitting mechanism.

8. The membrane strip preparation mechanism as described in claim 1, characterized in that, The first mounting bracket includes a frame and a guide member disposed on the frame along the first horizontal direction; Each of the adsorption strips is slidably connected to the guide member. Among the multiple adsorption strips, the adsorption strip at the first end is connected to the frame and adjacent adsorption strips are connected by a spacing connector. The adsorption strip at the second end is connected to the driving end of the first spacing drive assembly. Alternatively, among the multiple adsorption strips, the adsorption strip at the first end is fixed to the frame, and the remaining adsorption strips are slidably connected to the guide member. Adjacent adsorption strips are connected by a spacing connector. The adsorption strip at the second end is connected to the driving end of the first spacing drive assembly. Of two adjacent adsorption strips, one adsorption strip is fixedly connected to one end of the spacing connector, and the other adsorption strip is slidably connected between the first limiting end and the second limiting end of the spacing connector. The first spacing drive assembly is used to drive the adsorption strip located at the second end to reciprocate along the first horizontal direction, so as to realize the reciprocating movement of each adsorption strip between the first limiting end and the second limiting end of the corresponding spacing connector; when the adsorption strip moves to the first limiting end, each adsorption strip moves closer to each other; when the adsorption strip moves to the second limiting end, each adsorption strip moves further away from each other.

9. The membrane strip preparation mechanism as described in claim 8, characterized in that, The first pitch drive assembly includes a pitch cylinder, a connecting plate, a pitch tie rod, a pin, and a spring, wherein: The spacing rod is slidably connected to the guide and close to the adsorption strip located at the second end; The split cylinder is mounted on the frame. One end of the connecting plate is connected to the telescopic rod of the split cylinder, and the other end of the connecting plate is connected to the split pull rod. One end of the pin is provided with a limiting step, and the other end of the pin passes through the split pull rod and is connected to the adsorption strip located at the second end. The spring is sleeved on the pin, one end of the spring abuts against the split pull rod, and the other end of the spring abuts against the limiting step. The pitch cylinder is used to drive the pitch tie rod to reciprocate along the first horizontal direction.

10. The membrane strip preparation mechanism as described in claim 1, characterized in that, The membrane strip splitting mechanism includes a second mounting bracket, a second splitting drive assembly, and multiple splitting stages, wherein: Multiple partition platforms are slidably connected side-by-side on the second mounting bracket, and each partition platform is used to support one membrane strip. The second splitting drive assembly is used to drive the multiple splitting stages to slide apart, such that the spacing between the multiple membrane strips is the first predetermined value.

11. The membrane strip preparation mechanism as described in claim 10, characterized in that, The second pitch drive assembly includes a traction section and a pitch belt, wherein: The pulling part is disposed on the second mounting bracket; The first end of the spacing belt is connected to the second mounting bracket, and the plurality of spacing platforms are all connected to the spacing belt, wherein the length of the spacing belt between each adjacent spacing platform is equal; The driving end of the pulling part is connected to the spacing platform near the second end of the spacing belt. The pulling part is used to drive the spacing platform near the second end of the spacing belt to slide away from the first end of the spacing belt to tighten the spacing belt. When the spacing belt is tightened, the spacing between the multiple membrane strips supported on the multiple spacing platforms is the first predetermined value.

12. A string welding machine, characterized in that, The stringing machine includes the membrane strip preparation mechanism, the welding strip feeding mechanism, the battery cell feeding mechanism, the handling mechanism, the conveying mechanism, and the stringing mechanism as described in any one of claims 1 to 11, wherein: The membrane strip preparation mechanism is used to provide membrane strips, the welding ribbon feeding mechanism is used to provide welding ribbon groups, and the battery cell feeding mechanism is used to provide battery cells, wherein the battery cells are IBC battery cells; The conveying mechanism is used to lay N+1 membrane strips provided by the membrane strip preparation mechanism, N+1 welding ribbon groups provided by the welding ribbon feeding mechanism, and N battery cells provided by the battery cell feeding mechanism on the conveying mechanism according to a predetermined stringing rule; The conveying mechanism transports the laid-out membrane strips, welding ribbons, and battery cells to the stringing mechanism, which is used to weld the membrane strips, welding ribbons, and battery cells into battery strings.

13. The string welding machine as described in claim 12, characterized in that, The string arrangement rule is as follows: N+1 sets of welding ribbons and N+1 membrane strips are laid out, wherein each membrane strip is stacked on top of the corresponding set of welding ribbons; N battery cells are stacked face down on N+1 sets of welding strips, wherein one battery cell is stacked between each two adjacent film strips; Alternatively, the string arrangement rule is: Place N battery cells with their backs facing up onto the conveying mechanism; N+1 membrane strips and N+1 sets of welding ribbons are laid out, wherein one membrane strip is laid between each adjacent battery cell, on the outside of the first battery cell, and on the outside of the Nth battery cell, and N+1 sets of welding ribbons are laid on top of the N battery cells and N+1 membrane strips.

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