String of batteries production line and string of batteries production equipment

Abstract

The present invention discloses a battery string production line and battery string production equipment. The battery string production line includes a back film laying device, a solder ribbon group providing device, a battery cell providing device, a conveying device and a hot pressing device. The back film laying device lays a strip-shaped back film on the conveying device. The solder ribbon group providing device places a solder ribbon group on the conveying device and stacks the solder ribbon group on the back film of the conveying device. The battery cell providing device places battery cells on the conveying device. Among them, the i-th battery cell is stacked on the second half of the i-th solder ribbon group, and the first half of the (i + 1)-th solder ribbon group is stacked on the i-th battery cell, where i is any natural number greater than 0. The hot pressing device is configured to hot press the battery string stacked on the conveying device, and the battery string at least includes the back film, the solder ribbon group and the battery cells stacked on the conveying device. The technical solution provided by the present invention can effectively improve the production efficiency of the battery string.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cell self-production, and specifically, to a battery string production line and battery string production equipment. Background Art

[0002] In traditional solar cells, the photo-generated current inside the cell is led to the outside of the cell through the grid lines thereon. Considering the final conductivity, silver paste printing is currently mostly used for the grid lines. According to different printing processes, solar cells are divided into three main grid, four main grid, and multi-main grid types.

[0003] For the above-mentioned three-main-grid, four-main-grid, and multi-main-grid solar cells, currently, multiple solder tapes are respectively welded to each main grid line of the solar cell through a flux to obtain a battery string formed by connecting several cells in series, and finally the conversion of light energy into electrical energy is realized. However, the battery string obtained by welding the solder tape to the main grid line not only has a large shading area, which affects the photoelectric conversion efficiency, but also has a high silver paste cost.

[0004] In order to overcome the above problems, main-grid-free crystalline silicon solar cells have emerged. The manufacturing process of connecting main-grid-free cells in series adopts upper and lower diaphragm sheets respectively arranged on both sides of a battery string formed by stacking a solder tape and a cell.

[0005] Therefore, there is a need to provide a battery string production line that can efficiently connect main-grid-free cells in series. Summary of the Invention

[0006] The purpose of the present invention is to provide a battery string production line and battery string production equipment to effectively improve the production efficiency of connecting main-grid-free cells into a battery string.

[0007] To achieve the above purpose, a battery string production line of the present invention includes a back film laying device, a solder tape group providing device, a cell providing device, a conveying device, and a hot pressing device; wherein,

[0008] The back film laying device lays a strip-shaped back film on the conveying device, and the back film extends and is laid along the conveying direction of the conveyor belt of the conveying device and can move along with the conveyor belt;

[0009] The solder tape group providing device is used to place a solder tape group on the conveying device and stack the solder tape group on the back film of the conveying device, wherein each solder tape group includes a plurality of parallel solder tape segments;

[0010] The cell providing device places cells on the conveying device; wherein, the i-th cell is stacked on the second half of the i-th solder tape group, and the first half of the (i + 1)-th solder tape group is stacked on the i-th cell, where i is any natural number greater than 0;

[0011] A hot pressing device, which is configured to hot press the battery string stacked on the conveying device, wherein the battery string at least includes the back film, the solder ribbon group and the battery cells stacked on the conveying device.

[0012] Optionally, the back film laying device includes a film tape roll wound with the back film and a guide wheel for guiding the back film released from the film tape roll, and the back film can be pulled along the guide wheel to be laid on the conveying device.

[0013] Optionally, the conveying device further includes a bottom plate for supporting the upper part of the conveyor belt, and adsorption holes are provided on both the conveyor belt and the bottom plate, and the back film is adsorbed on the conveyor belt through the adsorption holes.

[0014] Optionally, the solder ribbon group providing device includes a plurality of solder ribbon rolls, a solder ribbon pressing mechanism, a solder ribbon cutting mechanism and a solder ribbon traction mechanism. The solder ribbon rolls, the solder ribbon pressing mechanism, the solder ribbon cutting mechanism and the solder ribbon traction mechanism are arranged in sequence along the extension direction of the solder ribbon. The solder ribbon traction mechanism pulls the solder ribbon through the solder ribbon cutting mechanism to a preset position, and when the solder ribbon pressing mechanism presses the solder ribbon, the solder ribbon cutting mechanism cuts the solder ribbon to form the solder ribbon group including a plurality of solder ribbon segments, and the solder ribbon traction mechanism clamps the cut solder ribbon group and places it on the conveying device.

[0015] Optionally, the solder ribbon group providing device further includes a solder ribbon pressing mechanism, which is arranged between the solder ribbon pressing mechanism and the solder ribbon cutting mechanism and is used for pressing the solder ribbon group to be cut, so as to form a bending structure at the position between two adjacent battery cells when the solder ribbon group is stacked with the battery cells.

[0016] Optionally, the battery string production line further includes a solder ribbon guiding device located at one end of the conveying device close to the solder ribbon group providing device, and the solder ribbon guiding device guides the solder ribbon when the solder ribbon group providing device provides the solder ribbon to the conveying device.

[0017] Optionally, the conveying device includes a conveyor belt and a conveyor belt driving mechanism for driving the conveyor belt to run. The first end of the conveyor belt is configured to be able to stepwise extend in a direction away from the second end and be able to stepwise return in a direction towards the second end. Wherein, every time the conveyor belt stepwise extends a predetermined length in the direction away from the second end, a vacant loading station is formed at the first end of the conveyor belt, and the battery cells and the solder ribbon are stacked at the loading station; wherein, the first end is the end of the conveyor belt close to the solder ribbon group providing device, and the second end is the end far from the first end;

[0018] The solder ribbon guiding device is arranged to move synchronously with the first end of the conveyor belt.

[0019] Optionally, the battery string production line further includes a front film laying device, which is arranged to lay the i-th sheet of front film on the first half of the (i + 1)-th solder ribbon group after stacking the (i + 1)-th solder ribbon group.

[0020] Optionally, the battery string production line further includes a plurality of pressing tools respectively used for pressing the solder ribbon groups on the conveying device. Among them, when i is 1, the i-th pressing tool is arranged to press on the first half of the i-th solder ribbon group; when i is greater than 1, the i-th pressing device is arranged to press on the (i - 1)-th front film.

[0021] The hot pressing device is arranged to hot press the battery string stacked with the front film and the pressing tool. After hot pressing, the pressing tool is removed from the battery string.

[0022] Optionally, the battery string production line further includes a front film loading mechanism, a tooling circulation mechanism, a tooling handling device, and a tooling loading device. The lower end surface of the pressing tool is arranged to be able to adsorb the front film, where:

[0023] The front film loading mechanism lays the front film on the tooling circulation mechanism.

[0024] The tooling handling device places the pressing tool output from the conveying device after passing through the hot pressing device on the front film conveyed by the tooling circulation mechanism, so that the pressing tool adsorbs a front film.

[0025] The tooling loading device picks up the pressing tool adsorbed with the front film and places it on the solder ribbon group at the loading position of the conveying device.

[0026] Optionally, the battery string production line further includes a front film loading mechanism, a tooling circulation mechanism, a tooling handling device, and a tooling loading device, where:

[0027] The front film loading mechanism lays the front film on the tooling circulation mechanism.

[0028] The tooling handling device places the pressing tool output from the conveying device after passing through the hot pressing device on the front film conveyed by the tooling circulation mechanism.

[0029] The loading device for the tooling is provided with a picking mechanism and an adsorption mechanism. The picking mechanism is used for picking up the pressing tooling, and the adsorption mechanism is used for adsorbing the front film under the picked pressing tooling. After the picking mechanism of the loading device for the tooling picks up the pressing tooling and the adsorption mechanism adsorbs the front film under the pressing tooling, the pressing tooling and the front film under the pressing tooling are placed on the solder ribbon group at the loading position of the conveying device.

[0030] Optionally, the battery string production line further includes a front film laying device, which is configured to stack a plurality of front films on the battery string formed by stacking the back film, the solder ribbon group and the battery cells, wherein the i-th front film is stacked on the first half of the (i + 1)-th solder ribbon group.

[0031] Optionally, the battery string production line further includes a plurality of pressing toolings respectively used for pressing on the first half of the solder ribbon groups of the battery string. After the hot pressing device hot presses the battery string formed by stacking the back film, the solder ribbon group and the battery cells, the pressing tooling is removed from the battery string;

[0032] The front film laying device is configured to stack a plurality of the front films on the battery string from which the pressing tooling has been removed.

[0033] Optionally, the battery string production line further includes a secondary hot pressing device; wherein,

[0034] The secondary hot pressing device is configured to hot press the battery string with the front film laid thereon above the battery string to fix the front film on the battery string;

[0035] Alternatively, the secondary hot pressing device is provided on the front film laying device, and when the front film stacking device releases the front film on the battery string, the released front film is hot pressed by the secondary hot pressing device.

[0036] Optionally, the battery string production line further includes a plurality of pressing toolings respectively used for pressing on the first half of the solder ribbon groups of the battery string;

[0037] The front film laying device is configured to partially attach and hot press the front film on the first half of the solder ribbon group at the gap of the pressing tooling;

[0038] After the pressing tooling is removed, the front film is further attached to the first half of the solder ribbon group, and the hot pressing device hot presses the battery string with the front film further attached thereto, so that the stacked back film, solder ribbon group, battery cells and the front film are fixed together.

[0039] Optionally, the pressing tooling is a U-shaped structure including a strip-shaped pressing part and support parts respectively arranged at both ends of the pressing part. The pressing part is transversely pressed on the solder ribbon group, and the support parts at both ends are located on both sides of the solder ribbon group. The front film part is attached to the solder ribbon group at the middle gap of the U-shaped structure;

[0040] Alternatively, the pressing tooling is a frame structure with a hollow middle. Parts at opposite ends of the frame structure are pressed on the solder ribbon group, and the front film part is attached to the solder ribbon group at the hollow position of the frame structure.

[0041] Optionally, the battery string production line further includes a plurality of pressing toolings respectively used for pressing on the front half section of the solder ribbon group of the battery string. After the hot pressing device hot presses the battery string formed by stacking the back film, the solder ribbon group and the battery cells, the pressing tooling is removed from the battery string;

[0042] The battery string production line further includes a front film laying device, which is configured to lay the strip-shaped front film on the battery string after removing the pressing tooling. The length of the strip-shaped front film is set to be at least laid on at least two solder ribbon groups of the battery string.

[0043] According to another aspect of the present invention, there is also provided a battery string production system, which includes at least two battery string production lines as described above, and the at least two battery string production lines are arranged in parallel.

[0044] The technical solution provided by the present invention can effectively improve the production efficiency of the battery string by first laying the strip-shaped back film A on the conveying device and then laying the solder ribbon group and the battery cells on the back film A. Description of the Drawings

[0045] Figure 1 It is a schematic structural diagram of the battery string production line according to the first embodiment of the present invention;

[0046] Figures 2 - 4 It is a schematic diagram of stacking the back film, the solder ribbon group, the battery cells, the front film and the pressing tooling on the conveying device of the battery string production line according to the first embodiment of the present invention;

[0047] Figure 5 It is a schematic diagram of removing the pressing tooling from the stacked battery string on the conveying device after hot pressing in the first embodiment;

[0048] Figure 6 It is a schematic structural diagram of the battery string production line according to the second embodiment of the present invention;

[0049] Figures 7 - 9Schematic diagram of stacking a back film, a solder ribbon group, a battery cell and a pressing tooling on a conveying device according to a second embodiment of the present invention;

[0050] Figure 10 Schematic diagram of removing the pressing tooling from the battery string stacked on the conveying device and stacking a front film on the battery string after hot pressing in the second embodiment;

[0051] Figure 11 Schematic diagram of stacking a front film on the battery string stacked on the conveying device in the third embodiment;

[0052] Figure 12 For Figure 11 Enlarged view at E in

[0053] Figure 13 For Figure 12 Cross-sectional view taken along F-F of

[0054] Figure 14 Schematic diagram of further pressing the front film on the solder ribbon group and hot pressing the front film after removing the hot pressing tooling in the third embodiment;

[0055] Figure 15 Schematic diagram of the structure of the conveying device.

[0056] Explanation of reference numerals

[0057] 1 - Solder ribbon group providing device; 11 - Solder ribbon roll; 12 - Solder ribbon pressing device; 13 - Solder ribbon pressing device; 14 - Solder ribbon cutting device; 2 - Back film laying device; 21 - Film tape roll wound with back film A; 22 - Guide wheel; 3 - Conveying device; 31 - Conveyor belt; 32 - Base; 33 - Stepping platform; 331 - Mounting bracket; 34 - Fixed platform; 35 - Conveyor belt driving mechanism; 351 - Driving roller; 352 - First guide roller; 353 - Second guide roller; 354 - Tensioning roller; 4 - Hot pressing device; 5 - Solder ribbon guiding device; 6 - Pressing tooling; 61 - Pressing part; 62 - Supporting part; 7 - Film tape roll wound with front film D. Detailed implementation manners

[0058] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted.

[0059] In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that one or more of the specific details may be omitted in practicing the technical solutions of the present disclosure, or other methods, components, devices, steps, etc. may be employed. In other cases, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0060] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right", etc. may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature. It should be understood that, in addition to the orientations shown in the figures, the spatial terms are intended to include different orientations of the device during use or operation. For example, if the device in the figures is inverted, an element described as being "below" other elements or features will be positioned "above" the other elements or features. Thus, the exemplary term "lower" can encompass both upper and lower orientations. The device may also be positioned in other ways, such as rotated 90 degrees or in other orientations, and the spatial relative descriptions used herein can be interpreted accordingly.

[0061] The present invention provides a battery string production line, which includes a back film laying device 2, a solder ribbon group providing device 1, a battery cell providing device, a conveying device 3, and a hot pressing device 4; wherein,

[0062] The back film laying device 2 lays a strip-shaped back film A on the conveying device 3, and the back film A extends and is laid along the conveying direction of the conveyor belt of the conveying device 3 and can move with the conveyor belt.

[0063] The solder ribbon group providing device 1 is used to place a solder ribbon group B on the conveying device 3 and stack the solder ribbon group B on the back film A of the conveying device 3, and each solder ribbon group B includes a plurality of parallel solder ribbon segments.

[0064] The battery cell providing device places battery cells C on the conveying device 3; wherein, the i-th battery cell C is stacked on the second half of the i-th solder ribbon group B, and the first half of the (i + 1)-th solder ribbon group B is stacked on the i-th battery cell C, and i is any natural number greater than 0.

[0065] The hot pressing device 4 is configured to hot press the battery string stacked on the conveying device 3, and the battery string at least includes the back film A, the solder ribbon group B, and the battery cells C stacked on the conveying device 3.

[0066] The technical solution provided by the present invention can effectively improve the production efficiency of battery strings by first laying the strip-shaped back film A on the conveying device and then laying the solder ribbon group B and the battery cells C on the back film A.

[0067] The technical solution provided by the present invention will be described in detail below through specific embodiments.

[0068] The first embodiment:

[0069] In this embodiment, as Figure 1 shown, the back film laying device 2 includes a film roll 21 wound with the back film A and a guide wheel 22 for guiding the back film A released from the film roll 21 wound with the back film A. The back film A can be drawn along the guide wheel 22 and laid on the conveying device 3.

[0070] The conveying device 3 further includes a bottom plate for supporting the upper part of the conveyor belt. Suction holes are provided on both the conveyor belt and the bottom plate, and the back film A is adsorbed on the conveyor belt through the suction holes. In this way, when the conveyor belt runs in the direction away from the back film laying device 2, it can draw the back film A forward for laying.

[0071] The solder ribbon group providing device 1 includes a plurality of solder ribbon rolls 11, a solder ribbon pressing mechanism 12, a solder ribbon cutting mechanism 14 and a solder ribbon traction mechanism ( Figure 1 not shown in the figure). The solder ribbon rolls 11, the solder ribbon pressing mechanism 12, the solder ribbon cutting mechanism 14 and the solder ribbon traction mechanism are arranged in sequence along the extension direction of the solder ribbon. The solder ribbon traction mechanism draws the solder ribbon through the solder ribbon cutting mechanism 14 to a preset position. When the solder ribbon pressing mechanism 12 presses the solder ribbon, the solder ribbon cutting mechanism 14 cuts the solder ribbon to form a solder ribbon group B including a plurality of solder ribbon segments. The solder ribbon traction mechanism clamps the cut solder ribbon group B and places it on the conveying device 3. Of course, it can be understood that the solder ribbon group providing device 1 can also be a device that directly provides solder ribbon segments.

[0072] Preferably, the solder ribbon group providing device 1 further includes a solder ribbon pressing mechanism 13, which is arranged between the solder ribbon pressing mechanism 12 and the solder ribbon cutting mechanism 14 and is used to press the solder ribbon group to be cut, so as to form a bending structure at the position between two adjacent battery cells when the solder ribbon group is stacked with the battery cells, that is, the solder ribbon group bends between the upper battery cell and the lower battery cell.

[0073] The battery string production line further includes a solder ribbon guiding device 5 located at one end of the conveying device 3 close to the solder ribbon group providing device 1, and the solder ribbon guiding device 5 guides the solder ribbon when the solder ribbon group providing device 1 provides the solder ribbon to the conveying device 3.

[0074] In this embodiment, the conveying device 3 includes a conveyor belt and a conveyor belt driving mechanism for driving the conveyor belt to run. The first end of the conveyor belt is configured to stepwise extend in a direction away from the second end and to stepwise return in a direction towards the second end. Wherein, for each stepwise extension of a predetermined length in the direction away from the second end, an empty loading station is formed at the first end of the conveyor belt, and the battery cells and the welding tapes are stacked at the loading station. Wherein, the first end is the end of the conveyor belt close to the welding tape group providing device 1, and the second end is the end far from the first end.

[0075] The welding tape guiding device 5 is arranged to move synchronously with the first end of the conveyor belt.

[0076] Specifically, as Figure 15 shown, the conveying device 3 includes a conveyor belt 31, and also includes a base 32, a fixed platform 34, a stepping platform 33 and a platform moving mechanism for driving the stepping platform 33 to move. Among them: The fixed platform 34 is fixedly connected to the base 32, the stepping platform 33 is slidably connected to the base 32, and the platform moving mechanism can drive the stepping platform 33 to stepwise move towards or away from the fixed platform 34 in the conveying direction of the conveyor belt 31 (the fixed platform 34 is relatively closer to the second end of the conveyor belt than the stepping platform 33);

[0077] The conveyor belt 31 is arranged on the fixed platform 34 and the stepping platform 33. When the stepping platform 33 moves away from the fixed platform 34, the conveyor belt 31 moves upward from the bottom at the end of the stepping platform 33 away from the fixed platform 34, so that the upper surface of the conveyor belt 31 stepwise extends in a direction away from the fixed platform 34 along with the stepping platform 33, that is, the conveyor belt 31 extends towards the first end.

[0078] The welding tape guiding device 5 is arranged to move synchronously with the stepping platform 33, so as to realize the guiding of the welding tape by making the welding tape guiding device 5 synchronize with the first end of the conveyor belt 31.

[0079] In this embodiment, the conveyor belt driving mechanism 35 for driving the conveyor belt 31 to run includes a driving roller 351, a first guiding roller 352, a second guiding roller 353 and a tensioning roller 354;

[0080] The driving roller 351 is arranged at the end of the fixed platform 34 far from the stepping platform 33 and is driven to rotate by a driving motor. The first guiding roller 352 is located at the end of the stepping platform 33 far from the fixed platform 34, and the first guiding roller 352 and the second guiding roller 353 are installed on the stepping platform 33. The tensioning roller 354 is located below the first guiding roller 352 and the second guiding roller 353. The tensioning roller 354 is arranged to be able to move back and forth along the conveying direction of the conveyor belt 31 to adjust and tension the conveyor belt 31. Specifically, a slide rail extending along the conveying direction of the conveyor belt 31 can be arranged on the base 32, and the tensioning roller 354 moves back and forth along the slide rail under the drive of the tensioning roller driving cylinder; the conveyor belt 31 is wound around the driving roller 351, the first guiding roller 352, the second guiding roller 353 and the tensioning roller 354 in sequence, wherein the second guiding roller 353 is located on the transmission surface of the conveyor belt 31; when the stepping platform 33 moves away from the fixed platform 34, the first guiding roller 352 and the second guiding roller 353 move with the stepping platform 33 and guide the conveyor belt 31 to move upward and extend from below.

[0081] In this embodiment, the battery string production line further includes a front film laying device (not shown in the figure). The front film laying device is arranged to stack the i-th sheet-shaped front film D on the first half section of the (i + 1)-th solder tape group B after stacking the (i + 1)-th solder tape group B.

[0082] The battery string production line further includes a plurality of pressing tools 6 respectively used for pressing the solder tape groups on the conveying device 3. Among them, when i is 1, the i-th pressing tool 6 is arranged to press on the first half section of the i-th solder tape group B; when i is greater than 1, the i-th pressing device 6 is arranged to press on the (i - 1)-th front film D.

[0083] The hot pressing device 4 is arranged to hot press the battery string stacked with the front film D and the pressing tool 6. After hot pressing, the pressing tool 6 is removed from the battery string.

[0084] The specific process of producing a battery string by using the battery string production line provided in this embodiment is as follows (refer to Figures 1 - 5 )

[0085] First, one end of the back film A is placed on the conveying device 3 through the back film laying device 2. When the conveyor belt of the conveying device 3 moves away from the back film laying device 2, the back film A moves forward with the conveyor belt;

[0086] As Figure 2 shown, when the back film A is laid on the conveying device 3 for a preset length (about the length of two battery chips C), the solder tape traction device of the solder tape group providing device 2 places the cut first solder tape group B on the back film A of the conveying device 3;

[0087] The cell providing device places the first cell C on the conveying device 3 such that the first cell C is stacked on the second half of the first solder tape group B;

[0088] As Figure 3 shown, a pressing tool 6 is placed on the first half of the first solder tape group B to press and position the first solder tape group B;

[0089] Continue to place the solder tape group B and the cell C on the conveying device 3 such that the i-th cell C is stacked on the second half of the i-th solder tape group B, and the first half of the (i + 1)-th solder tape group B is stacked on the i-th cell C, where i is any natural number greater than 0;

[0090] As Figure 4 shown, after stacking the (i + 1)-th solder tape group B, the i-th sheet-shaped front film D is stacked on the first half of the (i + 1)-th solder tape group B, and the pressing tool 6 is placed on the front film D to press and position the solder tape group B. That is, starting from the second solder tape group B, each time a solder tape group is stacked, the front film D is stacked on this solder tape group, and the pressing tool 6 pressing on this front film D is placed for positioning.

[0091] Among them, each time a solder tape group B and a cell C are stacked, the conveying device 3 can be set to step once in the direction towards the solder tape group providing device 1 to form a loading station at the first end of the conveying device 3. At the same time, the back film A is further pulled and laid on this loading station, and the solder tape group B and the cell C are continuously laid on the back film A at this loading station. After laying a preset number of solder tape groups B and cells C on the conveying device 3, the conveying device 3 conveys the battery string formed by the back film A, the solder tape group B, the cell C, and the front film D towards the second end.

[0092] After the conveying device 3 conveys the battery string stacked with the back film A, the solder tape group B, the cell C, and the front film D (with the pressing tool 6 pressing on this battery string) to the hot pressing station for hot pressing, the stacked back film A, solder tape group B, cell C, and front film D are fixed together, and then the pressing tool 6 is removed from this battery string.

[0093] In this embodiment, when stacking the i-th front film D on the first half of the (i + 1)-th solder tape group B, the front film D can be laid first, and then the pressing tool 6 is placed on the front film D;

[0094] It is also possible to carry the front film D located below the pressing tool 6 when carrying the pressing tool 6, so as to place the pressing tool 6 and the front film D below it on the solder tape group B at the same time.

[0095] In this embodiment, in order to carry the front film D below the pressing tool 6 when carrying the pressing tool 6, the battery string production line further includes a front film loading mechanism, a tool circulation mechanism, a tool handling device, and a tool loading device, where:

[0096] The lower end surface of the pressing tool 6 is arranged to be able to adsorb the front film D;

[0097] The front film loading mechanism lays the front film D on the tool circulation mechanism;

[0098] The tool handling device places the pressing tool 6 output after passing through the hot pressing device 4 on the conveying device 3 on the front film D conveyed by the tool circulation mechanism, so that the lower end surface of the pressing tool 6 adsorbs a front film D;

[0099] The tool loading device picks up the pressing tool 6 adsorbed with the front film D and places it on the solder tape group B at the loading position of the conveying device 3, and presses and positions the solder tape group at the loading station.

[0100] In order to carry the front film D below the pressing tool 6 when carrying the pressing tool 6, in this embodiment, a picking mechanism and an adsorption mechanism may also be provided on the tool loading device. The picking mechanism is used to pick up the pressing tool, and the adsorption mechanism is used to adsorb the front film below the picked pressing tool. Specifically, the picking mechanism may be a clamp capable of clamping the pressing tool 6 or a magnet capable of adsorbing the pressing tool 6, and the adsorption mechanism may be a suction cup or other structures such as those having adsorption holes capable of adsorbing the front film.

[0101] The front film loading mechanism lays the front film D on the tool circulation mechanism; the tool handling device places the pressing tool 6 output after passing through the hot pressing device 4 on the front film D conveyed by the tool circulation mechanism; after the picking mechanism of the tool loading device picks up the pressing tool 6 and the adsorption mechanism adsorbs the front film below the pressing tool 6, the pressing tool 6 and the front film D below the pressing tool 6 are placed on the solder tape group at the loading position of the conveying device 3.

[0102] In this embodiment, the setting of the front film loading mechanism, the tool circulation mechanism, the tool handling device, and the tool loading device can realize the recycling of the pressing tool, that is, the pressing tool removed after the battery string is hot-pressed by the hot pressing device can be transported to the solder tape group at the loading position of the conveying device again through the tool loading device.

[0103] Second embodiment:

[0104] In this embodiment, as Figure 6As shown in the figure, the solder ribbon group providing device 1, the back film laying device 2, the conveying device 3, and the hot pressing device 4 included in the battery string production line are all the same as those in the above first embodiment. The difference is that the front film laying device in this embodiment is configured to stack a plurality of front films D on the battery string formed by stacking the back film A, the solder ribbon group B, and the battery cells C. Among them, the i-th front film D is stacked on the first half section of the (i + 1)-th solder ribbon group B.

[0105] The front film laying device may include a film roll 7 wound with the front film D. After the front film D on the film roll 7 wound with the front film D is pulled and cut into a front film D of a preset length, it is laid on each solder ribbon group B of the battery string.

[0106] The battery string production line further includes a plurality of pressing tools 6 respectively used for pressing on the first half section of the solder ribbon group B of the battery string. The pressing tool 6 is used for positioning the stacked battery cells and solder ribbons. After the hot pressing device 4 performs hot pressing on the battery string formed by stacking the back film A, the solder ribbon group B, and the battery cells C, the pressing tool 6 is removed from the battery string;

[0107] The front film laying device is configured to lay a plurality of front films D on the battery string after the pressing tool 6 is removed.

[0108] The specific process of producing a battery string using the battery string production line provided by this embodiment is as follows (in combination with Figures 6 - 10 )

[0109] First, one end of the back film A on the film roll 21 wound with the back film A is placed on the conveying device 3. When the conveyor belt of the conveying device 3 moves away from the back film laying device 2, the back film A moves forward with the conveyor belt;

[0110] As Figure 7 shown, after the back film A is laid on the conveying device 3 for about the length of two battery cells C, the solder ribbon traction device of the solder ribbon group providing device 2 places the first cut solder ribbon group B on the back film A of the conveying device 3;

[0111] The battery cell providing device places the first battery cell C on the conveying device 3, so that the first battery cell C is stacked on the second half section of the first solder ribbon group B;

[0112] As Figure 8 shown, a pressing tool 6 is placed on the first half section of the first solder ribbon group B to press and position the first solder ribbon group B;

[0113] Then, the solder ribbon group B and the battery cell C are continuously placed on the conveying device 3, so that the i-th battery cell C is stacked on the second half section of the i-th solder ribbon group B, and the first half section of the (i + 1)-th solder ribbon group B is stacked on the i-th battery cell C, where i is any natural number greater than 0;

[0114] As Figure 9 shown, after stacking the (i + 1)-th solder tape group B, a pressing tool 6 is placed on the first half of the (i + 1)-th solder tape group B to press and position the solder tape group B.

[0115] Wherein, for each stacking of a solder tape group B and a battery cell C, the conveying device 3 can be set to step forward once in the direction towards the solder tape group providing device 1, so as to form an empty loading station at the first end of the conveying device 3. At the same time, the back film A is further pulled and laid on this loading station, and the solder tape group B and the battery cell C are further laid on this loading station. After laying a preset number of solder tape groups B and battery cells C on the conveying device 3, the conveying device 3 conveys the battery string formed by the back film A, the solder tape group B, and the battery cell C in the direction towards the second end.

[0116] As Figure 10 shown, when the conveying device 3 conveys the battery string formed by the stacked back film A, solder tape group B, and battery cell C to the hot pressing station in the direction towards the second end, the hot pressing device 4 performs hot pressing on this battery string, so that the stacked back film A, solder tape group B, and battery cell C are fixed together; after the hot pressing device 4 performs hot pressing on the battery string formed by the stacking of the back film A, solder tape group B, and battery cell C, the pressing tool 6 is removed from the battery string;

[0117] The front film laying device is set to lay a plurality of front films D on the battery string from which the pressing tool 6 has been removed, that is, the i-th front film D is stacked on the first half of the (i + 1)-th solder tape group B.

[0118] In order to fix the laid front film D on the battery string, the battery string production line further includes a secondary hot pressing device; wherein,

[0119] The secondary hot pressing device is set to perform hot pressing on the battery string with the front film D laid thereon above the battery string to fix the front film D on the battery string;

[0120] Or, a secondary hot pressing device is provided on the front film laying device. When the front film stacking device releases the front film D onto the battery string, the released front film D is hot pressed by the secondary hot pressing device.

[0121] Third Embodiment:

[0122] This embodiment is basically the same as the battery string production line in the above second embodiment. The difference from the second embodiment is that, as Figure 11 shown, in this embodiment, after the solder tape group B and the battery cell C are sequentially stacked on the back film A, and the pressing tool 6 presses and positions the first half of the solder tape group B, the front film laying device partially adheres and hot presses the front film D on the first half of the (i + 1)-th solder tape group at the gap of the pressing tool 6;

[0123] After removing the pressing tooling 6, the front film D is further attached to the first half of the solder tape group B, and the hot pressing device 4 hot presses the battery string with the front film D further attached thereto, so that the stacked back film A, solder tape group B, battery cells C and front film D are fixed together. As Figure 14 shown, the hot pressing device 4 can be a pressing tool for pressing on the front film D.

[0124] The structure of the pressing tooling 6 can be as shown in Figure 12 and Figure 13 shown. The pressing tooling 6 includes a strip-shaped pressing part and supporting parts respectively arranged at both ends of the pressing part. The pressing part and the supporting parts at both ends form a U-shaped structure. The pressing part is transversely pressed on the solder tape group, and the supporting parts at both ends are located on both sides of the solder tape group B. The front film D is partially attached to the solder tape group in the middle gap of the U-shaped structure;

[0125] Preferably, the pressing part of the U-shaped structure is transversely pressed on the solder tape group B at a position close to the front end, Figure 13 showing that one end of the front film D close to the front end of the solder tape group B is placed on the pressing part of the pressing tooling 6.

[0126] Of course, the pressing tooling 6 can also be set in other structural forms. For example, the pressing tooling 6 is set as a frame structure with a hollow middle. Parts at opposite ends of the frame structure are pressed on the solder tape group B, and the front film D is partially attached to the hollow position of the frame structure.

[0127] Fourth Embodiment:

[0128] This fourth embodiment is similar to the above embodiments. First, the solder tape group B and the battery cells C are stacked in sequence on the back film A of the conveying device 3, and the pressing tooling 6 is stacked and positioned on the first half of each solder tape group B. After hot pressing the battery string formed by stacking the back film A, solder tape group B and battery cells C by the hot pressing device 4, the pressing tooling 6 is removed from the battery string, and then the front film laying device lays the front film D on the battery string after removing the pressing tooling 6.

[0129] Different from the above second embodiment, the front film laying device is set to lay the strip-shaped front film D on the battery string after removing the pressing tooling, and the length of the strip-shaped front film D is set to at least cover at least two solder tape groups of the battery string.

[0130] According to another aspect of the present invention, there is also provided a battery string production device, which includes at least two battery string production lines as above, and at least two battery string production lines are arranged in parallel.

[0131] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any suitable combination of each specific technical feature. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods. However, these simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A battery string production line, characterized in that, the battery string production line includes a back film laying device, a solder ribbon group providing device, a battery cell providing device, a conveying device and a hot pressing device; wherein, the back film laying device lays a strip-shaped back film on the conveying device, and the back film extends and is laid along the conveying direction of the conveyor belt of the conveying device and can move along with the conveyor belt; the solder ribbon group providing device includes a solder ribbon cutting mechanism and a solder ribbon traction mechanism, and the solder ribbon group providing device is used to place a solder ribbon group on the conveying device and stack the solder ribbon group on the back film of the conveying device, wherein each solder ribbon group includes a plurality of parallel solder ribbon segments; when the back film is laid on the conveying device for a preset length, the solder ribbon traction device of the solder ribbon group providing device places the first solder ribbon group obtained by cutting on the back film of the conveying device; the battery cell providing device places battery cells on the conveying device; wherein, the i-th battery cell is stacked on the second half of the i-th solder ribbon group, and the first half of the (i + 1)-th solder ribbon group is stacked on the i-th battery cell, and i is any natural number greater than 0; each time a solder ribbon group and a battery cell are stacked, the conveying device steps once in the direction towards the solder ribbon group providing device to form an empty loading station at the first end of the conveying device, and at the same time, the back film is further pulled and laid on this loading station, and then the solder ribbon group and the battery cell are continuously laid on this loading station. After a preset number of solder ribbon groups and battery cells are laid on the conveying device, the conveying device conveys the battery string formed by the back film, the solder ribbon group and the battery cell towards the second end; a hot pressing device, the hot pressing device is arranged to hot press the battery string stacked on the conveying device, wherein, the battery string at least includes the back film, the solder ribbon group and the battery cell stacked on the conveying device.

2. The battery string production line according to claim 1, characterized in that, the back film laying device includes a film tape roll wound with the back film and a guide wheel for guiding the back film released from the film tape roll, and the back film can be pulled along the guide wheel to be laid on the conveying device.

3. The battery string production line according to claim 2, characterized in that, the conveying device further includes a bottom plate for supporting the upper part of the conveyor belt, and adsorption holes are provided on both the conveyor belt and the bottom plate, and the back film is adsorbed on the conveyor belt through the adsorption holes.

4. The battery string production line according to claim 1, characterized in that, the solder ribbon group providing device includes a plurality of solder ribbon rolls, a solder ribbon pressing mechanism, a solder ribbon cutting mechanism and a solder ribbon traction mechanism, and the solder ribbon rolls, the solder ribbon pressing mechanism, the solder ribbon cutting mechanism and the solder ribbon traction mechanism are arranged in sequence along the extending direction of the solder ribbon. The solder ribbon traction mechanism pulls the solder ribbon through the solder ribbon cutting mechanism to a preset position, and when the solder ribbon pressing mechanism presses the solder ribbon, the solder ribbon cutting mechanism cuts the solder ribbon to form the solder ribbon group including a plurality of solder ribbon segments, and the solder ribbon traction mechanism clamps the cut solder ribbon group and places it on the conveying device.

5. The battery string production line according to claim 4, characterized in that, the solder tape group providing device further includes a solder tape pressing mechanism, which is arranged between the solder tape pressing mechanism and the solder tape cutting mechanism, and is used to press the solder tape group to be cut, so as to form a bending structure at the position between two adjacent battery wafers when the solder tape group is stacked with the battery wafers.

6. The battery string production line according to claim 1, characterized in that, the battery string production line further includes a solder tape guiding device located at one end of the conveying device close to the solder tape group providing device, and the solder tape guiding device guides the solder tape when the solder tape group providing device provides the solder tape onto the conveying device.

7. The battery string production line according to claim 6, characterized in that, the conveying device includes a conveyor belt and a conveyor belt driving mechanism for driving the conveyor belt to run. The first end of the conveyor belt is set to be able to step and extend in a direction away from the second end and be able to step and return in a direction towards the second end. Wherein, every time the conveyor belt steps and extends a predetermined length in the direction away from the second end, a vacant loading station is formed at the first end of the conveyor belt, and the battery wafers and the solder tape are stacked at the loading station; wherein, the first end is the end of the conveyor belt close to the solder tape group providing device, and the second end is the end far from the first end; the solder tape guiding device is set to move synchronously with the first end of the conveyor belt.

8. The battery string production line according to any one of claims 1-7, characterized in that, the battery string production line further includes a front film laying device, and the front film laying device is set to stack the i-th sheet of front film on the first half of the (i + 1)-th solder tape group after stacking the (i + 1)-th solder tape group.

9. The battery string production line according to claim 8, characterized in that, the battery string production line further includes a plurality of pressing tools respectively used for pressing the solder tape groups on the conveying device. Wherein, when i is 1, the i-th pressing tool is set to press on the first half of the i-th solder tape group; when i is greater than 1, the i-th pressing device is set to press on the (i - 1)-th front film; the hot pressing device is set to hot press the battery string stacked with the front film and the pressing tool. After hot pressing, the pressing tool is removed from the battery string.

10. The battery string production line according to claim 9, characterized in that, the battery string production line further includes a front film loading mechanism, a tool circulation mechanism, a tool handling device and a tool loading device. The lower end surface of the pressing tool is set to be able to adsorb the front film, wherein: the front film loading mechanism lays the front film on the tool circulation mechanism; the tool handling device places the pressing tool output from the conveying device after passing through the hot pressing device on the front film conveyed by the tool circulation mechanism, so that the lower end surface of the pressing tool adsorbs a front film; the tool loading device picks up the pressing tool adsorbed with the front film and places it on the solder tape group at the loading position of the conveying device.

11. The battery string production line according to claim 9, It is characterized in that the battery string production line further includes a front film loading mechanism, a tooling circulation mechanism, a tooling handling device and a tooling loading device, wherein: the front film loading mechanism lays the front film on the tooling circulation mechanism; the tooling handling device places the pressed tooling output after passing through the hot pressing device on the conveying device on the front film conveyed by the tooling circulation mechanism; the tooling loading device is provided with a picking mechanism and an adsorption mechanism. The picking mechanism is used to pick up the pressed tooling, and the adsorption mechanism is used to adsorb the front film under the picked pressed tooling. After the picking mechanism of the tooling loading device picks up the pressed tooling and the adsorption mechanism adsorbs the front film under the pressed tooling, the pressed tooling and the front film under the pressed tooling are placed on the solder tape group at the loading position of the conveying device.

12. The battery string production line according to any one of claims 1-7, It is characterized in that the battery string production line further includes a front film laying device, and the front film laying device is configured to stack a plurality of front films on the battery string formed by stacking the back film, the solder tape group and the battery cells, wherein the i-th front film is stacked on the first half of the (i + 1)-th solder tape group.

13. The battery string production line according to claim 12, It is characterized in that the battery string production line further includes a plurality of pressing toolings respectively used for pressing on the first half of the solder tape group of the battery string. After the hot pressing device hot-presses the battery string formed by stacking the back film, the solder tape group and the battery cells, the pressing tooling is removed from the battery string; the front film laying device is configured to stack a plurality of the front films on the battery string from which the pressing tooling is removed.

14. The battery string production line according to claim 13, It is characterized in that the battery string production line further includes a secondary hot pressing device; wherein, the secondary hot pressing device is configured to hot-press the battery string with the front film laid thereon above the battery string to fix the front film on the battery string; alternatively, the secondary hot pressing device is provided on the front film laying device, and when the front film stacking device releases the front film on the battery string, the released front film is hot-pressed by the secondary hot pressing device.

15. The battery string production line according to claim 12, It is characterized in that the battery string production line further includes a plurality of pressing toolings respectively used for pressing on the first half of the solder tape group of the battery string; the front film laying device is configured to partially attach and hot-press the front film on the first half of the solder tape group at the gap of the pressing tooling; after the pressing tooling is taken away, the front film is further attached to the first half of the solder tape group, and the hot pressing device hot-presses the battery string with the front film further attached thereto, so that the stacked back film, solder tape group, battery cells and the front film are fixed together.

16. The battery string production line according to claim 15, It is characterized in that The pressing tooling includes a strip-shaped pressing part and support parts respectively arranged at two ends of the pressing part. The pressing part and the support parts at both ends form a U-shaped structure, wherein the pressing part is transversely pressed on the solder ribbon group, and the support parts at both ends are located on both sides of the solder ribbon group, and the front film portion is attached to the solder ribbon group at the middle gap of the U-shaped structure; Alternatively, the pressing tooling is a frame structure with a hollow middle. Parts at opposite ends of the frame structure are pressed on the solder ribbon group, and the front film portion is attached to the solder ribbon group at the hollow position of the frame structure.

17. The battery string production line according to any one of claims 1-7, characterized in that the battery string production line further includes a plurality of pressing toolings respectively used for pressing on the front half of the solder ribbon group of the battery string. After the hot pressing device hot-presses the battery string formed by stacking the back film, the solder ribbon group and the battery cells, the pressing tooling is removed from the battery string; the battery string production line further includes a front film laying device, and the front film laying device is arranged to lay the strip-shaped front film on the battery string after the pressing tooling is removed. The length of the strip-shaped front film is set to be at least laid on at least two solder ribbon groups of the battery string.

18. A battery string production device, characterized in that the battery string production device includes at least two battery string production lines according to any one of claims 1-17, and at least two battery string production lines are arranged in parallel.

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