BC type battery string forming device and method and battery string

Abstract

The invention provides BC type battery string forming equipment, a BC type battery string forming method and a battery string. Comprising a battery stringing platform, two groups of half-string prefabricating platforms, two groups of pre-arranging platforms, two groups of battery piece feeding mechanisms, two groups of first carrying mechanisms and two groups of second carrying mechanisms, wherein the two groups of half-string prefabricating platforms are respectively positioned on two opposite sides of a battery piece feeding station of the battery stringing platform; the two groups of pre-arranging platforms are respectively positioned on the upstream sides of the groups of half-string prefabricating platforms; the first carrying mechanism is used for placing the battery pieces on the pre-arrangement platform one by one; the first carrying hands of each group of second carrying mechanisms are used for integrally carrying all the battery pieces on the pre-arrangement platform and placing the battery pieces on the half-string prefabricating platform one by one, and the second carrying hands are used for integrally carrying all the battery pieces on the half-string prefabricating platform to a battery piece feeding station; and battery pieces with the same number as the whole battery strings are formed on the battery piece feeding station. According to the invention, the production speed of the battery string can be accelerated, the time required for arranging the battery pieces is reduced, and the requirement on a battery piece carrying hand is reduced.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic cell string fabrication technology, specifically to a BC-type cell stringing device, method, and cell string. Background Technology

[0002] In the field of photovoltaic module manufacturing, a cell string consists of several cells connected by solder ribbons. In BC type cell strings, the solder ribbons are only distributed on one side of the cells to enable current conduction between adjacent cells.

[0003] BC-class batteries have the characteristic of no grid lines on the front side, thus eliminating the light energy loss caused by the grid lines on the front side of the battery string in traditional battery strings, maximizing the utilization of the energy of incident photons and improving the light energy conversion efficiency.

[0004] In existing battery string manufacturing technology, the required battery cells are arranged in one go, and then the entire arrangement of the battery cells is transported. The battery cell arrangement time is long, the requirements for battery cell handling personnel are high, and it will result in a long production line. Summary of the Invention

[0005] The BC battery stringing equipment, method, and battery string designed in this invention can overcome the shortcomings of the existing BC battery stringing method, which requires all battery cells to be strung together to be arranged at once and then transported as a whole to the stringing platform. This method has the disadvantages of long battery cell arrangement time and high requirements for battery cell handling personnel.

[0006] The purpose of this invention is to provide a BC-type battery stringing device, comprising: A battery stringing platform is used to place a target number of battery cells and to attach solder ribbons and adhesive films to the top surface of each battery cell. Two sets of semi-string prefabrication platforms are located on opposite sides of the battery cell loading station of the battery stringing platform, and the length extension direction of the two sets of semi-string prefabrication platforms is parallel to the stringing conveying direction of the battery stringing platform. Two sets of pre-arranged platforms are located upstream of each set of prefabricated half-string platforms; Two sets of cell feeding mechanisms are used to synchronously and continuously provide qualified cells. Two sets of first conveying mechanisms are set up one-to-one with the two sets of battery cell feeding mechanisms, and are used to place the battery cells at the end of the conveyor line of each set of battery cell feeding mechanisms one by one onto the pre-arrangement platform corresponding to their positions. Two sets of second transport mechanisms, each set of second transport mechanisms having a first transporter for transporting all the battery cells on the pre-arrangement platform corresponding to its position as a whole and placing them one by one on the half-string prefabrication platform corresponding to its position so that the spacing between the battery cells placed on the half-string prefabrication platform is the target spacing. Each set of second transport mechanisms has a second transporter for transporting each battery cell on the half-string prefabrication platform corresponding to its position as a whole to the battery cell loading station, so that the battery cells are arranged on the battery cell loading station to form a number of battery cells consistent with the number of the whole battery string.

[0007] In some embodiments, the second transport mechanism includes a longitudinal transport component and a transverse transport component. The first transporter is assembled on the longitudinal transport component, which drives the first transporter to move longitudinally between the pre-arrangement platform and the half-string prefabrication platform. The second transporter is assembled on the transverse transport component, which drives the second transporter to move transversely between the half-string prefabrication platform and the battery cell loading station. The longitudinal transport component and the transverse transport component are assembled as one unit.

[0008] In some embodiments, the longitudinal travel of the longitudinal moving component in one set of the second transport mechanisms is at least twice the overall length of the battery cell it transports, the length of one set of the two sets of semi-string prefabrication platforms is at least twice the length of the other set, and the position of the second transport mechanism with the longer longitudinal travel corresponds to the position of the semi-string prefabrication platform with the longer length.

[0009] In some embodiments, the BC-type battery stringing equipment further includes a ribbon preparation device and a membrane strip preparation device, which are located on opposite sides of the battery stringing station of the battery stringing platform.

[0010] In some embodiments, the ribbon preparation apparatus includes a ribbon preparation platform and a ribbon preparation mechanism. The ribbon prepared by the ribbon preparation mechanism is placed on the ribbon preparation platform. The film strip preparation apparatus includes a film strip preparation platform and a film preparation mechanism. The film strip prepared by the film preparation mechanism is placed on the film strip preparation platform. The BC-type battery stringing equipment further includes a third transport mechanism. The third transport mechanism can move laterally above the battery stringing platform to adsorb and transport each film strip on the film strip preparation platform to the ribbon preparation platform. After using the adhesiveness of each film strip to bond with the ribbon on the ribbon preparation platform to form a composite, the composite is further bonded to the top surface of each battery cell at the battery stringing station.

[0011] In some embodiments, the strip-making mechanism includes a strip feeding and cutting device and a corresponding strip-pulling hand. Two sets of the strip feeding and cutting devices are configured, and the strip-pulling hand is located between the two sets of the strip feeding and cutting devices. The strip-pulling hand has clamping components facing one side of each of the two sets of the strip feeding and cutting devices.

[0012] In some embodiments, the BC-type battery stringing equipment further includes a string output line and an NG (Not From Good) container. The battery stringing platform also has a battery string detection and unloading station. The positions of the string output line and the NG container correspond to the positions of the battery string detection and unloading station and are arranged sequentially along a direction perpendicular to the stringing conveying direction. It also includes a fourth conveying mechanism, which is used to transport and place qualified battery strings from the battery string detection and unloading station onto the string output line along a direction perpendicular to the stringing conveying direction, and to transport unqualified battery strings into the NG container.

[0013] In some embodiments, the BC-type battery stringing device further includes a battery string detection mechanism that spans across opposite sides of the battery stringing platform.

[0014] The present invention also provides a method for stringing BC type batteries using the above-described BC type battery stringing device, comprising the following steps: S1, simultaneously operate two sets of the aforementioned cell feeding mechanisms to continuously provide qualified cells; S2, the first handling mechanism synchronously places the battery cells at the end of the conveyor line of each group of battery cell loading mechanism corresponding to its position onto each pre-arranged platform in turn. S3, control the first transporter of each of the two groups of the second transport mechanism to transport all the pre-arranged battery cells on each of the pre-arranged platforms as a whole, and place them one by one on each half-string prefabrication platform corresponding to their positions. In the process of placing each battery cell on the half-string prefabrication platform in sequence, the first transporter adjusts the target spacing between two adjacent battery cells along the string conveying direction. S4, when the number of battery cells placed on each of the half-string prefabrication platforms is half of the target number, control the second transporters of the two sets of second transport mechanisms to transport all the battery cells on each of the half-string prefabrication platforms to the battery cell loading station simultaneously or sequentially. S5, control the operation of the battery stringing platform to move each battery cell at the battery cell loading station to the battery stringing station of the battery stringing platform, and place the solder ribbon and adhesive film on the top surface of each battery cell to form a battery string.

[0015] The present invention also provides a battery string, which is manufactured using the aforementioned BC type battery stringing method.

[0016] The BC-type battery stringing equipment, method, and battery string of the present invention include two sets of battery cell feeding mechanisms, two sets of first transport mechanisms, two sets of half-string prefabrication platforms, and two sets of second transport mechanisms arranged simultaneously along the stringing conveying direction in the battery stringing equipment. This enables the synchronous operation of two battery feeding lines. Two battery half-strings are simultaneously formed at the two half-string prefabrication platforms, and then the two battery half-strings are transported to the battery cell feeding station of the battery stringing platform to be combined to form a battery cell with the same number of battery cells required for the entire battery string. This can significantly accelerate the production speed of the battery string, reduce the time required for battery cell arrangement, and reduce the requirements for battery cell transporters. At the same time, since the two half-string prefabrication platforms are respectively arranged in parallel on opposite sides of the battery stringing platform, the total length of the battery string production line can be shortened to a certain extent. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the component layout of a BC-type battery stringing device in an embodiment of the present invention (view from top). Figure 2 This is a schematic diagram of the battery stringing process in an embodiment of the present invention. The arrows in the diagram indicate the direction in which each battery cell is transported (from a top view). Figure 3 yes Figure 2 A magnified view of a section at point A, where the red lines indicate weld strip A and weld strip B.

[0018] In the diagram: 1. Battery string assembly platform; 11. Battery cell loading station; 12. Battery string connection station; 13. Battery string inspection and unloading station; 2. Half-string prefabrication platform; 3. Pre-arrangement platform; 4. Battery cell loading mechanism; 51. First conveying mechanism; 52. Second conveying mechanism; 521. Longitudinal moving component; 522. Lateral moving component; 61. Welding strip making platform; 62. Film strip making platform; 631. Welding strip feeding and cutting device; 632. Welding strip puller; 641. Adhesive film feeding and cutting device; 642. Adhesive film puller; 71. String output line; 72. NG material box; 73. Battery string inspection mechanism. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of regions and layers is exaggerated. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0020] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

[0021] The following examples describe the BC-type battery stringing device, method, and battery string of the present invention. These examples are only a portion of the embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. All other embodiments obtained by those skilled in the art without inventive effort should be covered within the scope of protection of the present invention.

[0022] Please refer to the reference. Figures 1 to 3 According to an embodiment of the present invention, a BC-type battery stringing device is provided, comprising: A battery stringing platform 1 is used to place a target number of battery cells and to attach solder ribbons and adhesive films to the top surface of each battery cell. The target number is specifically determined based on the number of battery cells in a complete battery string to be prepared. It is understood that the aforementioned solder ribbons include A solder ribbons (such as...). Figure 3 (shown by the red line in the image) and B solder strip (as shown in the image) Figure 3 (As shown by the green lines in the diagram) Solder strips A and B are alternately arranged on the top surface of the same cell along the width of the cell (i.e., the dimension perpendicular to the length of the cell string). Along the length of the cell string, solder strips A and B are respectively connected to two adjacent cells. See details... Figure 3 As shown; Two sets of half-string prefabrication platforms 2 are respectively located on opposite sides of the cell loading station 11 of the battery stringing platform 1 (within the range of 1-3). Figure 1 The orientation shown is for reference, that is, the upper and lower sides), and the length extension direction of the two sets of prefabricated half-string platforms 2 is parallel to the string conveying direction of the battery stringing platform 1; Two sets of pre-arranged platforms 3 are located upstream of each set of prefabricated half-string platforms 2, with the upstream side being relative to the string conveying direction; Two sets of battery cell feeding mechanisms 4 are used to synchronously and continuously provide qualified battery cells. Specifically, the battery cells provided by each set of battery cell feeding mechanisms 4 must undergo good and defective product screening and positioning. Two sets of first conveying mechanisms 51 are arranged one-to-one with two sets of battery cell loading mechanisms 4, and are used to transport the battery cells at the end of the conveyor line of each set of battery cell loading mechanisms 4 (i.e., Figure 1 The battery cells (at the right end of the indicated orientation) are placed one by one on the pre-arranged platform 3 corresponding to their positions; Two sets of second transport mechanisms 52, each set of second transport mechanisms 52 having a first transporter (not labeled in the figure) for transporting all the battery cells on the pre-arrangement platform 3 corresponding to its position as a whole and placing them one by one on the half-string prefabrication platform 2 corresponding to its position, so that the spacing between the battery cells placed on the half-string prefabrication platform 2 is the target spacing. Each set of second transport mechanisms 52 has a second transporter (not labeled in the figure) for transporting each battery cell on the half-string prefabrication platform 2 corresponding to its position as a whole to the battery cell loading station 11, so that the battery cells are arranged on the battery cell loading station 11 to form a battery cell quantity consistent with the whole battery string. Specifically, Figure 1 For reference, the first transport mechanism 51 on the upper side is used to place the battery cells provided by the battery cell loading mechanism 4 on the upper side one by one onto the pre-arrangement platform 3 on the upper side. The first transporter of the second transport mechanism 52 on the upper side transports all the battery cells on the pre-arrangement platform 3 on the upper side as a whole and places them one by one onto the half-string prefabrication platform 2 on the upper side. The second transporter of the second transport mechanism 52 on the upper side is used to transport all the battery cells (the number is half of the aforementioned target number) on the half-string prefabrication platform 2 as a whole and place them onto the aforementioned battery cell loading station 11. At the same time, the first transport mechanism 51 and the second transport mechanism 52 on the lower side also perform similar battery cell transport operations, thereby combining the two half-strings of battery cells on the upper and lower sides on the battery cell loading station 11 of the battery stringing platform 1 to form a complete battery string (the number is the aforementioned target number).

[0023] In this technical solution, the battery stringing equipment is equipped with two sets of battery cell feeding mechanisms 4, two sets of first conveying mechanisms 51, two sets of half-string prefabrication platforms 2, and two sets of second conveying mechanisms 52 along the stringing conveying direction. This enables the synchronous operation of two battery feeding lines. Two battery half-strings are formed simultaneously at the two half-string prefabrication platforms 2, and then the two battery half-strings are transported to the battery cell feeding station 11 of the battery stringing platform 1 to be combined to form the battery cell arrangement required for the entire battery string (i.e., the same number of battery cells required for the entire battery string). This can significantly speed up the production speed of the battery string, reduce the time required for battery cell arrangement, and reduce the requirements for battery cell handlers. At the same time, since the two half-string prefabrication platforms 2 are respectively arranged in parallel on opposite sides of the battery stringing platform 1, the total length of the battery string production line can be shortened to a certain extent.

[0024] In some embodiments, the second transport mechanism 52 includes a longitudinal transport component 521 and a transverse transport component 522. The first transporter is assembled on the longitudinal transport component 521, which drives the first transporter to move longitudinally between the pre-arrangement platform 3 and the half-string prefabrication platform 2. The second transporter is assembled on the transverse transport component 522, which drives the second transporter to move laterally between the half-string prefabrication platform 2 and the battery cell loading station 11. Specifically, Figure 1 The orientation shown is for reference. The aforementioned longitudinal movement is a translation in the vertical direction, and the aforementioned lateral movement is a translation in the horizontal direction. The longitudinal movement component 521 and the lateral movement component 522 are assembled into one unit.

[0025] In this technical solution, the longitudinal movement component 521 and the transverse movement component 522 are assembled into one unit, which can improve the compactness of the structure and facilitate the rational use of production space.

[0026] In some embodiments, the longitudinal travel of the longitudinal moving component 521 within a set of second transport mechanisms 52 is at least twice the overall length of the battery cell it transports. The length of one set of the two sets of semi-string prefabrication platforms 2 is at least twice the length of the other set. The second transport mechanism 52 of the set with the longer longitudinal travel (i.e., the set whose longitudinal travel is at least twice the overall length of the battery cell it transports) corresponds to the position of the longer set of semi-string prefabrication platforms 2. See details... Figure 1 As shown, in a specific application, the second transporter of the lower longitudinal transport component 521 can directly transport the entire battery half-string on the lower half-string prefabrication platform 2 to the downstream side of the battery cell loading station 11, while the second transporter of the upper longitudinal transport component 521 can directly transport the entire battery half-string on the upper half-string prefabrication platform 2 to the downstream side of the battery cell loading station 11, thereby directly forming a complete string arrangement at the battery cell loading station 11, without the need for the second transporter to generate lateral movement drive, simplifying the logic control of the second transport mechanism 52.

[0027] In some embodiments, the BC-type battery stringing equipment further includes a ribbon preparation device (not labeled in the figure) and a film strip preparation device (not labeled in the figure). It is understood that the aforementioned ribbon preparation device is used to prepare the aforementioned A ribbon and B ribbon, while the aforementioned film strip preparation device is used to prepare film strips (with adhesive properties) that correspond in quantity and size to the A ribbon and B ribbon. The ribbon preparation device and the film strip preparation device are respectively located on opposite sides of the battery stringing station 12 of the battery stringing platform 1 (i.e.,...). Figure 1 (As shown in the upper and lower sections).

[0028] In this technical solution, the welding strip preparation device and the film strip preparation device are respectively set on opposite sides of the battery stringing station 12 of the battery stringing platform 1, which can further optimize the production line layout and make the layout of the entire equipment more reasonable and compact.

[0029] In some embodiments, the ribbon preparation device includes a ribbon preparation platform 61 and a ribbon preparation mechanism (not labeled in the figure). The ribbon prepared by the ribbon preparation mechanism is placed on the ribbon preparation platform 61. The film strip preparation device includes a film strip preparation platform 62 and a film preparation mechanism (not labeled in the figure). The film strip prepared by the film preparation mechanism is placed on the film strip preparation platform 62. The BC-type battery stringing device also includes a third transport mechanism (not shown in the figure, not labeled). The third transport mechanism can move laterally above the battery stringing platform 1 to adsorb and transport each film strip on the film strip preparation platform 62 to the ribbon preparation platform 61. After the film strips are bonded to the ribbon on the ribbon preparation platform 61 using their adhesiveness to form a composite, the composite is further bonded to the top surface of each battery cell at the battery stringing station 12, thereby completing the stringing of the entire battery.

[0030] In this technical solution, each prepared film strip is transported to the prepared welding ribbon by a third transport mechanism to bond the welding ribbon at the corresponding position to form a composite of welding ribbon and film strip. Then, the composite is transported and placed on the top surface of the corresponding battery cell to form a series connection of each battery cell. Since the adhesiveness of the film is used to realize the synchronous transport of the welding ribbon, the structural design of the transporter configured in the third transport mechanism can be greatly simplified, the transport efficiency can be improved and the design and manufacturing costs can be reduced.

[0031] In some embodiments, the strip-making mechanism includes a strip feeding and cutting device 631 and a corresponding strip-pulling handle 632. The strip feeding and cutting device 631 is configured in two sets, and the strip-pulling handle 632 is located between the two sets of the strip feeding and cutting device 631. The strip-pulling handle 632 has clamping components facing one side of each of the two sets of the strip feeding and cutting device 631.

[0032] In this technical solution, the two sets of welding strip feeding and cutting devices 631 are used for feeding and cutting welding strip A and welding strip B respectively. At the same time, the pull handle 632 can use its clamping components facing both sides to form an alternating pulling operation on welding strip A and welding strip B, which further simplifies the structural design and improves the structural compactness of the equipment.

[0033] The welding strip feeding and cutting device 631 has a corresponding welding strip making platform (not shown in the figure). In some embodiments, there is a heating element (not shown in the figure) below the welding strip making platform to heat the welding strip. The diaphragm strip is heated by the welding strip when it contacts the welding strip. The contact position between the diaphragm strip and the welding strip becomes sticky when heated, and the welding strip is then adhered and gripped.

[0034] In some embodiments, the film-making mechanism includes a film feeding and cutting device 641 and a film-pulling hand 642. The film feeding and cutting device 641 is configured in two sets, and the film-pulling hand 642 is used to alternately pull out the film from the two sets of film feeding and cutting devices 641.

[0035] In some embodiments, the BC type battery stringing device further includes a string output flow line 71 and an NG material box 72. The battery stringing platform 1 also has a battery string detection and unloading station 13. The positions of the string output flow line 71 and the NG material box 72 are corresponding to the positions of the battery string detection and unloading station 13 and are arranged sequentially along a direction perpendicular to the stringing conveying direction. It also includes a fourth conveying mechanism (not shown in the figure, not indexed). The fourth conveying mechanism is used to transport and place qualified battery strings from the battery string detection and unloading station 13 onto the string output flow line 71 along a direction perpendicular to the stringing conveying direction, and to transport unqualified battery strings into the NG material box 72.

[0036] In this technical solution, the battery string conveyor 71 and the NG material box 72 are arranged sequentially along a direction perpendicular to the string conveying direction, which can make full use of the side area of ​​the battery string platform 1 and further shorten the length of the battery string production line.

[0037] In some embodiments, the BC-type battery stringing equipment further includes a battery string detection mechanism 73. This mechanism spans across opposite sides of the battery stringing platform 1, enabling online detection of each battery string transported below, thus improving detection efficiency. Specifically, the battery string detection mechanism 73 picks up and adsorbs the battery strings below it and performs photoluminescence (PL) detection (EL detection is also possible). Battery cells failing the PL test are collected in the NG (non-compliant) material box 72 (i.e., waste cell frame), while those passing the PL test are placed on the outgoing flow line 71 and transported out normally. The aforementioned PL detection, also known as photoluminescence detection, refers to a detection method that uses excitation light of a specific wavelength to irradiate a material and analyzes its emission spectrum intensity and distribution to determine internal defects, stress, or structural characteristics of the material.

[0038] It is understood that the aforementioned second, third, and fourth transport mechanisms all have a gantry frame main structure. The gantry frame structure can be formed by combining crossbeams and longitudinal beams in corresponding positions. Each transport mechanism only needs to have the displacement capabilities of lateral movement, longitudinal movement, and lifting. The aforementioned first transport mechanism 51 is preferably a multi-degree-of-freedom manipulator structure.

[0039] According to an embodiment of the present invention, a method for stringing BC-type batteries using the above-described BC-type battery stringing device is also provided, comprising the following steps: S1, simultaneously operate two sets of the battery cell feeding mechanisms 4 to continuously provide qualified battery cells; S2, the first handling mechanism 51 synchronously places the battery cells at the end of the conveyor line of each group of battery cell loading mechanism 4 corresponding to its position onto each pre-arrangement platform 3 in sequence. S3, control the first transporter of each of the two sets of second transport mechanisms 52 to transport all the pre-arranged battery cells on each pre-arranged platform 3 as a whole, and place them one by one on each half-string prefabrication platform 2 corresponding to their positions. In the process of placing each battery cell on the half-string prefabrication platform 2 in sequence, the first transporter adjusts the distance between two adjacent battery cells along the string conveying direction to maintain the target distance. S4, when the number of battery cells placed on each of the half-string prefabrication platforms 2 is half of the target number, control the second transporters of the two sets of second transport mechanisms 52 to transport all the battery cells on each of the half-string prefabrication platforms 2 to the battery cell loading station 11 simultaneously or sequentially. S5, control the operation of the battery stringing platform 1 to move each battery cell at the battery cell loading station 11 to the battery stringing station 12 of the battery stringing platform 1, and place the solder ribbon and adhesive film on the top surface of each battery cell to form a battery string.

[0040] In some implementations, the method further includes the following after step S5: S6, control the operation of the battery stringing platform 1 to transport the battery string formed at the battery stringing station 12 to the battery string inspection and unloading station 13 for quality inspection of the battery string, and control the fourth conveying mechanism to transport and place the qualified battery string on the string output flow line 71 in a direction perpendicular to the stringing conveying direction, and transport and place the unqualified battery string in the NG material box 72.

[0041] According to an embodiment of the present invention, a battery string is also provided, which is manufactured using the aforementioned BC class battery stringing method.

[0042] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A BC-type battery stringing device, characterized in that, include: A battery stringing platform (1) is used to place a target number of battery cells and to connect solder ribbons and adhesive films to the top surface of each battery cell. Two sets of half-string prefabrication platforms (2) are located on opposite sides of the battery cell loading station (11) of the battery stringing platform (1), and the length extension direction of the two sets of half-string prefabrication platforms (2) is parallel to the stringing conveying direction of the battery stringing platform (1). Two sets of pre-arranged platforms (3) are located upstream of each set of prefabricated half-string platforms (2); Two sets of battery cell feeding mechanisms (4) are used to synchronously and continuously provide qualified battery cells; Two sets of first conveying mechanisms (51) are set one-to-one with two sets of battery cell feeding mechanisms (4) to place the battery cells at the end of the conveying line of each set of battery cell feeding mechanisms (4) onto the pre-arrangement platform (3) corresponding to their positions. Two sets of second transport mechanisms (52), each set of second transport mechanisms (52) has a first transport hand for transporting all the battery cells on the pre-arrangement platform (3) corresponding to its position as a whole and placing them one by one on the half-string prefabrication platform (2) corresponding to its position so that the spacing between the battery cells placed on the half-string prefabrication platform (2) is the target spacing. Each set of second transport mechanisms (52) has a second transport hand for transporting the battery cells on the half-string prefabrication platform (2) corresponding to its position as a whole to the battery cell loading station (11) so that the battery cells are arranged on the battery cell loading station (11) to form a battery cell quantity consistent with the whole battery string.

2. The BC-type battery stringing device according to claim 1, characterized in that, The second transport mechanism (52) includes a longitudinal transport component (521) and a transverse transport component (522). The first transporter is assembled on the longitudinal transport component (521). The longitudinal transport component (521) is used to drive the first transporter to move longitudinally between the pre-arrangement platform (3) and the half-string prefabrication platform (2). The second transporter is assembled on the transverse transport component (522). The transverse transport component (522) is used to drive the second transporter to move laterally between the half-string prefabrication platform (2) and the battery cell loading station (11). The longitudinal transport component (521) and the transverse transport component (522) are assembled as one unit.

3. The BC-type battery stringing device according to claim 2, characterized in that, The longitudinal travel of the longitudinal moving component (521) in one set of the second transport mechanism (52) is at least twice the overall length of the battery cell it transports, and the length of one set of the two sets of the semi-string prefabrication platforms (2) is at least twice the length of the other set. The position of the second transport mechanism (52) with the longer longitudinal travel corresponds to the position of the semi-string prefabrication platform (2) with the longer length.

4. The BC-type battery stringing device according to claim 1, characterized in that, It also includes a ribbon preparation device and a membrane strip preparation device, which are located on opposite sides of the battery stringing station (12) of the battery stringing platform (1).

5. The BC-type battery stringing device according to claim 4, characterized in that, The ribbon preparation device includes a ribbon preparation platform (61) and a ribbon preparation mechanism. The ribbon prepared by the ribbon preparation mechanism is placed on the ribbon preparation platform (61). The film strip preparation device includes a film strip preparation platform (62) and a film preparation mechanism. The film strip prepared by the film preparation mechanism is placed on the film strip preparation platform (62). The BC type battery stringing equipment also includes a third transport mechanism. The third transport mechanism can move horizontally above the battery stringing platform (1) to adsorb and transport each film strip on the film strip preparation platform (62) to the top of the ribbon preparation platform (61). After using the adhesiveness of each film strip to stick to the ribbon on the ribbon preparation platform (61) to form a composite, the composite is further stuck to the top surface of each battery cell at the battery stringing station (12).

6. The BC-type battery stringing device according to claim 5, characterized in that, The strip-making mechanism includes a strip feeding and cutting device (631) and a corresponding strip-pulling handle (632). The strip feeding and cutting device (631) is configured in two sets. The strip-pulling handle (632) is located between the two sets of the strip feeding and cutting device (631), and the strip-pulling handle (632) has clamping components facing one side of the two sets of the strip feeding and cutting device (631).

7. The BC-type battery stringing device according to claim 1, characterized in that, It also includes a string output line (71) and an NG material box (72). The battery string assembly platform (1) also has a battery string detection and unloading station (13). The positions of the string output line (71) and the NG material box (72) are set in a direction perpendicular to the string assembly conveying direction, corresponding to the positions of the battery string detection and unloading station (13). It also includes a fourth conveying mechanism, which is used to transport and place qualified battery strings from the battery string detection and unloading station (13) onto the string output line (71) along a direction perpendicular to the string assembly conveying direction, and to transport unqualified battery strings into the NG material box (72).

8. The BC-type battery stringing device according to claim 7, characterized in that, It also includes a battery string detection mechanism (73) that spans across the opposite sides of the battery stringing platform (1).

9. A method for stringing BC type batteries using the BC type battery stringing device according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1, simultaneously operate two sets of the battery cell feeding mechanisms (4) to continuously provide qualified battery cells; S2, the first handling mechanism (51) synchronously places the battery cells at the end of the conveyor line of each group of battery cell loading mechanism (4) corresponding to its position onto each pre-arrangement platform (3) in turn. S3, control the first transporter of each of the two sets of second transport mechanisms (52) to transport all the pre-arranged battery cells on each pre-arranged platform (3) as a whole, and place them one by one on each half-string prefabrication platform (2) corresponding to their positions. In the process of placing each battery cell on the half-string prefabrication platform (2) in sequence, the first transporter adjusts the target spacing between two adjacent battery cells along the string conveying direction. S4, when the number of battery cells placed on each of the half-string prefabrication platforms (2) is half of the target number, control the second transporters of the two sets of second transport mechanisms (52) to transport all the battery cells on each of the half-string prefabrication platforms (2) to the battery cell loading station (11) in a synchronous or sequential manner. S5, control the operation of the battery stringing platform (1) to move each battery cell in the battery cell loading station (11) to the battery stringing station (12) of the battery stringing platform (1), and place the solder ribbon and adhesive film on the top surface of each battery cell to form a battery string.

10. A battery string, characterized in that, The battery string is manufactured using the BC-type battery stringing method described in claim 9.

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