Battery piece processing method and device

Abstract

The invention relates to the field of photovoltaic cells, in particular to a battery piece processing method and device, and the processing device comprises a carrier which is provided with a bearing surface, and the bearing surface is used for laying a battery piece and a welding strip; the pressure applying mechanism comprises a pressure applying piece, the pressure applying piece can move relative to the bearing surface, the pressure applying piece is provided with a contact surface, and the contact surface is used for applying pressure to the welding strip on the battery piece; and the contact surface has self-heating capability or heat conduction capability, so that the pressed welding strip is welded on the battery piece. The technical problem that the welding quality of the battery piece welding strip is poor is solved, and the technical effect of improving the welding quality of the battery piece welding strip is achieved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cells, and in particular to a method and device for processing a cell. Background Art

[0002] As the production capacity of photovoltaic modules continues to rise, the manufacturing process and quality control of solar cells, as the basic material for building photovoltaic modules, have become areas of great concern to the entire industry. In order to maximize the power generation potential of photovoltaic modules, the industry generally adopts the technical means of precision welding of welding strips on the surface of the cells. This step directly affects the current transmission efficiency and the overall performance of the module.

[0003] In the prior art, the soldering ribbon is arranged on the surface of the battery cell so that the soldering ribbon and the battery cell are in close contact. The soldering of the soldering ribbon on the battery cell is completed by heating the battery cell and curing. However, such a soldering ribbon welding method often causes problems such as cold soldering and poor welding stability between the soldering ribbon and the battery cell, thereby affecting the power generation efficiency and life of the battery cell.

[0004] Therefore, the technical problem of the prior art is that the welding quality of the battery cell welding strip is poor. Summary of the invention

[0005] The present application provides a battery cell processing device and method, which optimizes the technical problem of poor welding quality of battery cell welding strips, and achieves the technical effect of improving the welding quality of battery cell welding strips.

[0006] On the one hand, the present application provides a battery cell processing device, which adopts the following technical solution: A battery cell processing device comprises: a carrier, the carrier having a bearing surface, the bearing surface is used to arrange battery cells and welding strips, so that the welding strips are set on the battery cells; a pressure mechanism, the pressure mechanism comprises: a pressure piece, the pressure piece is movable relative to the bearing surface, the pressure piece has a contact surface, the contact surface is used to apply pressure to the welding strip and the battery cell; the contact surface has self-heating ability or heat conduction ability, so that the pressed welding strip and the battery cell are welded.

[0007] Preferably, the pressure member has at least a degree of freedom of movement along a first direction, where the first direction is a direction in which the battery cells are arranged, so that the pressure member can weld the welding strip and the battery cells along the first direction.

[0008] Preferably, the contact surface is arranged on the peripheral side of the pressure member and is in an arc shape. The pressure member is rotatable so that the contact surface can roll and apply pressure on the welding strip.

[0009] Preferably, the bearing surface is arranged on the circumferential side of the carrier and is in an arc shape. The carrier is rotatable so that when the bearing surface and the contact surface rotate synchronously in opposite directions, the solder strip and the battery cell are squeezed by the contact surface and the bearing surface so that the solder strip is welded to the battery cell.

[0010] Preferably, it further comprises: a preheating mechanism, wherein a preheating area is formed on the carrier, and the preheating area can accommodate at least a portion of the solder strip, and the preheating mechanism is used to preheat the solder strip in the preheating area, so that the preheated solder strip is squeezed onto the battery cell by the pressure mechanism and welded to the battery cell.

[0011] Preferably, a welding area is formed between the bearing surface and the contact surface, and the preheating area is located on a side of the welding area in a first direction, where the first direction is a battery cell arrangement direction.

[0012] Preferably, the positions of the preheating mechanism and the pressure-applying mechanism are relatively fixed; or, the positions of the preheating area and the welding area are relatively fixed.

[0013] On the other hand, the present application provides a battery cell processing method, which adopts the following technical solution: A method for processing a battery cell comprises: providing a carrier, the carrier having a bearing surface, the bearing surface being used to arrange the battery cells and welding strips; providing a pressure mechanism, the pressure mechanism having a pressure piece, the pressure piece being movable relative to the bearing surface, the pressure piece having a contact surface, the contact surface being pressurized on the welding strip and the battery cell; and making the contact surface have self-heating ability or heat-conducting ability so as to weld the pressed welding strip and the battery cell.

[0014] Preferably, the pressure member has at least a degree of freedom of movement along a first direction, where the first direction is a direction in which the battery cells are arranged, so that the pressure member can weld the welding strip and the battery cells along the first direction.

[0015] Preferably, the contact surface is arranged on the circumferential side of the pressure piece and is in an arc shape, so that the pressure piece can be rotated, and the contact surface can roll and apply pressure; or, the contact surface is arranged on the circumferential side of the pressure piece and is in an arc shape, so that the pressure piece can be rotated; the bearing surface is arranged on the circumferential side of the carrier and is in an arc shape, so that the carrier can be rotated, so that when the bearing surface and the contact surface rotate synchronously in opposite directions, the solder strip and the battery cell are squeezed by the contact surface and the bearing surface, so that the solder strip is welded to the battery cell.

[0016] Preferably, it also includes: providing a preheating mechanism, so that the preheating mechanism forms a preheating area on the carrier, and the preheating area can accommodate at least a part of the solder strip, so that the solder strip in the preheating area is preheated, so that the preheated solder strip is squeezed onto the battery cell by the pressure mechanism and welded to the battery cell.

[0017] Preferably, the positions of the preheating mechanism and the pressure-applying mechanism are relatively fixed; or, the positions of the preheating area and the welding area are relatively fixed.

[0018] Preferably, the soldering tape is arranged on the battery cell, and the soldering tape is pressed against the battery cell and welded; or the battery cell is arranged on the soldering tape, and the battery cell is pressed against the soldering tape and welded.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: In the present application, a pressure-applying mechanism is superimposed to apply pressure on the soldering ribbon and the battery cell, and the pressure-applying mechanism has the ability to self-heat or conduct heat, so that the soldering ribbon is squeezed and welded to the battery cell at a high temperature, thereby improving the welding contact effect between the soldering ribbon and the battery cell, improving the stability of the soldering ribbon on the battery cell, and thus improving the welding quality of the soldering ribbon of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the processing device described in this application; Figure 2 It is a first schematic diagram of a carrier of the processing device described in the present application; Figure 3 It is a second schematic diagram of the carrier of the processing device described in the present application; Figure 4 is a schematic diagram of a pressure-applying member of the processing device described in the present application; Figure 5 This is a first schematic diagram of a pressure-applying member with a circular arc surface of the processing device described in the present application; Figure 6 It is a second schematic diagram of the pressure-applying member with a circular arc surface of the processing device described in the present application; Figure 7 It is a third schematic diagram of the pressure-applying member with a circular arc surface of the processing device described in the present application; Figure 8 is a schematic diagram of a pressure-applying member with a plane of the processing device described in the present application; Fig. 9 It is a schematic diagram of the position of the preheating area and the pressure mechanism of the processing device described in the present application; Fig.10 It is a first schematic diagram of the preheating area of ​​the processing device described in the present application; Fig.11 is a second schematic diagram of the preheating area of ​​the processing device described in the present application; Fig.12 It is a schematic diagram of a preheating area of ​​the processing device described in the present application being adapted to a carrier having a circular arc surface; Fig.13 It is a schematic diagram of the processing method described in this application.

[0021] Explanation of reference numerals: 100, carrier; 110, carrying surface; 200, pressure mechanism; 210, pressure member; 211, contact surface; 212, pressure roller; 220, welding area; 300, preheating mechanism; 310, preheating area; 400, welding strip; 500, battery cell. DETAILED DESCRIPTION

[0022] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0023] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] The embodiments of the present application provide a battery cell processing device and method, which optimize the technical problem of poor welding quality of the battery cell 500 welding strip 400, and achieve the technical effect of improving the welding quality of the battery cell 500 welding strip 400.

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0026] Arranging welding strips 400 on a plurality of battery cells 500, electrically connecting the welding strips 400 and the battery cells 500 by welding, so that the originally independent battery cells 500 are connected into a string by the welding strips 400, is an efficient battery cell 500 processing method; however, in the actual production process, with the gradual improvement of the power generation efficiency of the battery cell 500, it is necessary to arrange hundreds of welding strips 400 on the battery cell 500, each welding strip 400 corresponds to the grid line on the battery cell 500, and it is necessary to weld the welding strips 400 and the grid line one by one; as the number of welding strips 400 increases, it is difficult to make the welding strips 400 and the grid line correspond to each other. The grid lines on the battery cell 500 correspond precisely, which causes the welding strip 400 to be skewed or even short-circuited. In order to solve the above problem, the applicant arranges the battery cell 500 on the carrier 100, so that the welding strip 400 is densely arranged on the battery cell 500, and then temporarily fixes the welding strip 400 by a press, and carries out temperature-raising welding together with the press. However, due to the presence of the press, it is difficult for the inside of the welding strip 400 to be heated evenly, resulting in poor welding of the welding strip 400. The welding quality of the welding strip 400 on the battery cell 500 is still worrying. Therefore, it is urgent to propose a processing device and method for welding the welding strip 400 with high efficiency and better effect.

[0027] In the processing of solar cell 500, by laying welding ribbon 400 on cell 500 and electrically welding welding ribbon 400 to cell 500, originally independent cell 500 are connected in series to form a high-efficiency battery assembly. This is a widely used processing method. However, with the advancement of science and technology and the continuous improvement of the power generation efficiency requirements of cell 500, this processing method has encountered new challenges in actual production. In order to improve the power generation efficiency of cell 500, it is now necessary to lay hundreds of welding ribbons 400 on each cell 500, and each welding ribbon 400 must accurately correspond to the grid line on the cell 500; this requirement greatly increases the difficulty of processing. Due to the large number of welding ribbons 400, it is difficult to ensure that each welding ribbon 400 can be accurately aligned with the grid line. Due to the precision requirements, the welding ribbon 400 is often skewed, and even causes short circuit problems.

[0028] In order to solve this problem, the applicant fixed the battery cell 500 on the carrier 100 so that the welding strip 400 was densely and evenly arranged on the battery cell 500; at the same time, the welding strip 400 was temporarily fixed using a press to ensure that the welding strip 400 would not shift during the welding process; however, although this method improved the alignment accuracy of the welding strip 400 to a certain extent, it brought new problems: due to the presence of the press, it is difficult for the welding strip 400 to be heated evenly during the heating welding process; the obstruction of the press caused the temperature of some areas of the welding strip 400 to be insufficient, and the ideal welding effect could not be achieved, resulting in a cold weld, which affected the welding quality of the battery cell 500; therefore, it is urgent to propose a more efficient and better welding strip 400 welding processing device and method to solve the current problems and improve the welding quality and welding efficiency of the battery cell 500.

[0029] This embodiment provides a battery cell processing device, such as Figure 1 As shown, the battery cell 500 processing device arranges a pressing mechanism 200 on the welding ribbon 400 and the battery cell 500, and the pressing mechanism 200 heats and squeezes the welding ribbon 400, so that the welding ribbon 400 is welded on the battery cell 500. Specifically, the battery cell 500 processing device includes a carrier 100, a pressing mechanism 200 and a preheating mechanism 300, the carrier 100 is used to carry the battery cell 500 and the welding ribbon 400; the pressing mechanism 200 is used to press the welding ribbon 400 and the battery cell 500 so that the welding ribbon 400 is pressed on the battery cell 500; the preheating mechanism 300 is used to preheat the welding ribbon 400 before welding.

[0030] like Figure 2 , 3 As shown, the carrier 100 is used to carry the battery cell 500 and the welding strip 400. The carrier 100 serves as a supporting base for the battery cell 500 and the welding strip 400. The carrier 100 has a supporting surface 110, and the supporting surface 110 is used to lay out the battery cell 500 and the welding strip 400. The welding strip 400 is located on the battery cell 500 and the welding strip 400 is in contact with the battery cell 500.

[0031] Specifically, the carrying surface 110 has the ability to fix the battery cell 500. In one embodiment, the carrying surface 110 has the ability of vacuum adsorption, so that the battery cell 500 can be fixed by vacuum adsorption; in other embodiments, the carrying surface 110 can have the ability of bonding, so that the battery cell 500 is bonded to the carrying surface 110; the welding strips 400 are arranged on the battery cell 500. Specifically, the number of welding strips 400 matches the number of grid lines on the battery cell 500, and they are arranged one by one. The welding strips 400 can achieve the required arrangement density by winding, or a dense welding strip 400 network can be directly provided and arranged on the battery cell 500; when the welding strips 400 are arranged on the battery cell 500, the welding strips 400 and the battery cell 500 are in contact.

[0032] It should be noted that there are multiple battery cells 500, and the same set of welding ribbons 400 are arranged between the multiple battery cells 500, that is, the same set of welding ribbons 400 are shared between the battery cells 500; in this way, a battery string is obtained after welding the welding ribbons 400 and the battery cells 500; wherein, several battery cells 500 are arranged along a first direction, and the welding ribbons 400 are also arranged in the first direction; therefore, the welding ribbons 400 and the battery cells 500 can be welded one by one or continuously in the first direction at a rate per unit length / per unit time.

[0033] In one embodiment, Figure 2 As shown, the carrying surface 110 is set as a plane. A plurality of battery cells 500 are arranged on the planar carrying surface 110; in this embodiment, the first direction is a direction parallel to the planar carrying surface 110, and the pressure mechanism 200 can weld the welding strips 400 and the battery cells 500 one by one or continuously along the first direction on the carrying surface 110; illustratively, the carrier 100 can be a flat plate structure, and the carrying surface 110 is set on the top surface of the carrier 100; further, the carrier 100 is set to be movable relative to the pressure mechanism 200, so that the battery cells 500 and the welding strips 400 have a more flexible processing position, thereby improving the welding processing efficiency of the welding strips 400.

[0034] In another embodiment, Figure 3 As shown, the bearing surface 110 is set as an arc surface. A plurality of battery cells 500 are arranged on the bearing surface 110 of the arc surface; in this embodiment, the first direction is consistent with the bearing surface 110 of the arc surface, that is, along the arc direction; the pressure mechanism 200 can weld the welding strip 400 and the battery cell 500 one by one or continuously along the first direction on the bearing surface 110; illustratively, the carrier 100 can be a cylindrical structure, and the bearing surface 110 is set on the peripheral side of the carrier 100; further, the carrier 100 is set to: not only movable relative to the pressure mechanism 200, but also rotatable around the axis, further increasing the processing flexibility of the battery cell 500 and the welding strip 400, and improving the processing efficiency of the welding of the welding strip 400.

[0035] like Figure 4-12 As shown, the pressure mechanism 200 is used to press the solder ribbon 400 and the battery cell 500 so that the solder ribbon 400 is pressed on the battery cell 500. The pressure mechanism 200 includes a pressure member 210, which is movable relative to the carrying surface 110, and has a contact surface 211, which is used to press the solder ribbon 400 on the battery cell 500; the contact surface 211 has self-heating ability or heat conduction ability, so that the pressed solder ribbon 400 is welded to the battery cell 500.

[0036] Specifically, Figure 4As shown, the contact surface 211 of the pressure member 210 is used to cooperate with the supporting surface 110 of the carrier 100, and the area between the contact surface 211 and the supporting surface 110 is defined as a welding area 220, and at least a portion of the welding strip 400 is provided in the welding area 220. In other words, the welding strip 400 located between the contact surface 211 and the supporting surface 110 is used as a part to be welded, and is squeezed by the contact surface 211 and the supporting surface 110. At the same time, due to the self-heating ability or thermal conductivity of the pressure member 210, the welding strip 400 can be welded to the battery cell 500 under high temperature and squeezing.

[0037] In one embodiment, a heating wire is provided inside the pressure member 210, and the pressure member 210 is heated by powering on; in other embodiments, the pressure member 210 is connected to a heat source, and the pressure member 210 is connected to the heat source through a heat conductive material to heat the pressure member 210. More specifically, the pressure member 210 has at least a degree of freedom of movement along a first direction, and the first direction is the direction in which the battery cell 500 is arranged, so that the pressure member 210 can weld the welding strip 400 and the battery cell 500 along the first direction; in other words, the welding strip 400 and the battery cell 500 located between the contact surface 211 and the bearing surface 110 are used as processing objects, and the pressure member 210 can move along the first direction on the carrier 100. In this way, the pressure member 210 moves in the first direction and switches the processing position to realize the welding process of the welding strip 400 and the battery cell 500 at different positions on the carrier 100 one by one or continuously; the pressure mechanism 200 can flexibly operate on the bearing surface 110 and efficiently complete the welding process of the battery cell 500. It is understandable that if Figure 5 , 6 As shown, the first direction is the layout direction of the battery cell 500. When the battery cell 500 is arranged in a plane on the carrier 100 with a flat structure, the first direction is a straight line direction; when the battery cell 500 is arranged in an arc direction on the carrier 100 with a cylindrical structure, the first direction is an arc direction.

[0038] In one embodiment, Figure 5 , 6 As shown, the contact surface 211 is an arc surface. The pressure member 210 is rotatable, and the contact surface 211 is arranged on the circumference of the pressure member 210 and is in an arc shape, so that the contact surface 211 can roll and apply pressure on the welding strip 400. The pressure member 210 rotates to make the contact surface 211 in the form of an arc surface roll on the bearing surface 110. It can be understood that at this time, there is a line contact between the contact surface 211 and the bearing surface 110, and the welding strip 400 located between the bearing surface 110 and the contact surface 211 is squeezed and closely contacts the battery cell 500. At the same time, under the high temperature of the pressure member 210, the welding between the welding strip 400 and the battery cell 500 is achieved.

[0039] For example, Figure 5 , 6As shown, the pressure member 210 can be a pressure roller 212. Preferably, the length of the pressure roller 212 is at least greater than the width of the welding strip 400, so that the welding strip 400 can be completely pressed by the pressure roller 212; Figure 5 As shown, when the bearing surface 110 is a plane, the pressure roller 212 has a degree of freedom of movement along the first direction relative to the carrier 100, and the pressure roller 212 itself can rotate around the axis, and the pressure roller 212 applies pressure to the welding strip 400, so that the welding strip 400 and the battery cell 500 are in close contact; when the pressure roller 212 moves along the first direction, the side of the pressure roller 212 rolls on the bearing surface 110 along the first direction, and on the rolling path, the welding strip 400 is squeezed and welded to the battery cell 500 by high temperature; preferably, when the carrier 100 is a flat structure, the axial direction of the pressure roller 212 is parallel to the bearing surface 110. Figure 6 As shown, when the bearing surface 110 is an arc surface, the position of the pressure roller 212 does not need to be changed, and the pressure roller 212 can be rotated; specifically, the pressure roller 212 itself can rotate around the axis, and the pressure roller 212 applies pressure on the welding ribbon 400, so that the welding ribbon 400 and the battery cell 500 are in close contact, and at the same time, the carrier 100 and the pressure roller 212 are rotated synchronously in the opposite direction, that is, the bearing surface 110 and the contact surface 211 rotate synchronously in the opposite direction, and the welding ribbon 400 and the battery cell 500 are squeezed by the contact surface 211 and the bearing surface 110, so that the welding ribbon 400 is welded to the battery cell 500; illustratively, as Figure 7 As shown, the pressure roller 212 rotates counterclockwise and the carrier 100 rotates clockwise, so that the welding ribbon 400 and the battery cell 500 arranged on the carrying surface 110 are gradually rolled into between the carrying surface 110 and the contact surface 211, that is, in the welding area 220, and the welding ribbon 400 is welded to the battery cell 500 under the action of compression and high temperature; preferably, the carrier 100 is a roller structure, and the axial direction of the pressure roller 212 is parallel to the axial direction of the carrier 100 of the roller structure.

[0040] In another embodiment, Figure 8 As shown, the contact surface 211 is a plane. The pressure member 210 is set to a flat plate structure, and the contact surface 211 and the carrier 100 are in surface contact. Compared with the carrier 100, the pressure member 210 has the freedom of movement along the first direction, and also has the function of rising and falling, so that the pressure member 210 can press up and down on the carrier 100, so that the welding strip 400 and the battery cell 500 at the current position are pressed and welded, and then rise and move to other positions, repeating the actions of falling, welding, and rising, so as to complete the welding of the welding strip 400 and the battery cell 500 in the first direction.

[0041] It can be understood that when the contact surface 211 is set to an arc surface, the contact surface 211 and the supporting surface 110 are in line contact, and when the pressure member 210 rotates, the welding strip 400 and the battery cell 500 can be continuously welded in the first direction; when the contact surface 211 is set to a plane, the contact surface 211 and the supporting surface 110 are in surface contact, and it is necessary to perform rising and falling actions to change the welding position, and the welding strip 400 and the battery cell 500 can be welded one by one in a certain unit length in the first direction.

[0042] The preheating mechanism 300 is used to preheat the welding strip 400 before welding. Figure 9-12 As shown, the preheating mechanism 300 forms a preheating area 310 on the carrier 100, and the preheating area 310 can accommodate at least part of the soldering strip 400. The preheating mechanism 300 is used to preheat the soldering strip 400 in the preheating area 310, so that the preheated soldering strip 400 is squeezed on the battery cell 500 by the pressure mechanism 200 and welded with the battery cell 500. It should be noted that there is a timing logic between the preheating mechanism 300 and the pressure mechanism 200. In other words, the preheating mechanism 300 is used to preheat the soldering strip 400, and the pressure mechanism 200 is used to pressurize and heat the soldering strip 400 for welding, that is, the soldering strip 400 entering the welding area 220 needs to be preheated in the preheating area 310. In this way, the preheated soldering strip 400 has a certain temperature, which can reduce the temperature requirement of the pressure member 210. The welding ribbon 400 and the battery cell 500 are welded along the first direction. Thus, the preheating area 310 needs to be arranged before the welding area 220 to meet the requirement of preheating of the welding ribbon 400 entering the welding area 220 through the preheating area 310 .

[0043] Specifically, Fig.10 , 11 As shown in Figures 12, the preheating mechanism 300 is arranged on the side of the pressure mechanism 200, and the preheating mechanism 300 cooperates with the pressure mechanism 200 so that the welding strip 400 is first preheated in the preheating area 310 formed by the preheating mechanism 300, and then pressure-welded by the pressure mechanism 200; in one embodiment, the preheating mechanism 300 preheats the welding strip 400 by infrared heating or laser heating.

[0044] Further, such as Fig.10 , 11As shown in Figures 12, the preheating area 310 formed by the preheating mechanism 300 and the welding area 220 formed by the pressure mechanism 200 have position requirements; considering that the pressure member 210 welds the welding strip 400 and the battery cell 500 along the first direction, in order to ensure that all welding strips 400 involved in welding are preheated, the preheating area 310 is set on the first direction side of the welding area 220; according to the timing logic, when the pressure member 210 starts to weld the welding strip 400 and the battery cell 500 along the first direction, the welding strip 400 in the preheating area 310 located on the front side of the welding area 220 (i.e., the first direction side) is in a preheating state, so that, with the movement of the pressure member 210, the preheated welding strip 400 enters the welding area 220 in turn, receives the squeezing effect of the pressure member 210, and is welded with the battery cell 500, which can ensure that the welding strip 400 entering the welding area 220 is preheated. Preferably, the preheating area 310 and the welding area 220 are adjacent to each other, so as to prevent the welding strip 400 from cooling down after preheating, thereby reducing the heating power requirement for the pressure member 210 .

[0045] Furthermore, if Fig.10 , 11 As shown in Figures 12, the positions of the preheating mechanism 300 and the pressure mechanism 200 are relatively fixed. In other words, the positions of the preheating area 310 and the welding area 220 are relatively fixed. The preheating mechanism 300 and the pressure mechanism 200 are a whole and can move along the first direction, so that although the preheating area 310 and the welding area 220 have different functions, their relative positions in space are fixed and can move synchronously in the first direction. When the pressure member 210 welds the welding strip 400 and the battery cell 500 at the first position, the preheating mechanism 300 preheats the welding strip 400 that is about to enter the welding area 220 at the second position located in the first direction of the first position; it ensures that while the welding strip 400 at the first position is being welded, the welding strip 400 at the second position is being preheated. As the preheating mechanism 300 and the pressure mechanism 200 move along the first direction, the welding strip 400 is first preheated in the preheating area 310, and the preheated welding strip 400 enters the welding area 220 in turn to be welded by the pressure member 210. In this way, the preheating and welding processes can be carried out efficiently without interruption or waiting, thereby improving the efficiency of the entire welding operation. In addition, since the preheating mechanism 300 and the pressure mechanism 200 move together, the synergy between them is also strengthened, which not only simplifies the operation process, but also improves the accuracy and stability of welding.

[0046] Preferably, Fig.12As shown, the carrying surface 110 is an arc surface (the carrier 100 is a roller structure), the pressure member 210 is a pressure roller 212, the pressure roller 212 itself can rotate around the axis, and the pressure roller 212 applies pressure on the welding ribbon 400, so that the welding ribbon 400 and the battery cell 500 are in close contact. At the same time, the carrier 100 and the pressure roller 212 are rotated synchronously in opposite directions, that is, the carrying surface 110 and the contact surface 211 are rotated synchronously in opposite directions. In the welding area 220, the welding ribbon 400 and the battery cell 500 are squeezed by the contact surface 211 and the carrying surface 110, so that the welding ribbon 400 is welded to the battery cell 500; The above-mentioned preheating area 310 is set in the area 220 in the welding progress direction of the welding strip 400, that is, in the first direction, the welding strip 400 is located in the preheating area 310 for preheating, and as the pressure member 210 and the carrier 100 rotate, exemplarily, as the pressure roller 212 rotates counterclockwise and the carrier 100 rotates clockwise, the welding strip 400 is first preheated in the preheating area 310, and then gradually rolled into between the supporting surface 110 and the contact surface 211, that is, enters the welding area 220, and the welding strip 400 is squeezed and welded to the battery cell 500 under the action of high temperature.

[0047] In the present application, there is no limitation on the driving methods for movement and rotation of various structures. For example, the movement can be achieved by a cylinder, a screw rod, etc.; the rotation can be achieved by a motor, etc.

[0048] This embodiment also provides a battery cell processing method, such as Fig.13 As shown, the method is generally applied to the above-mentioned battery cell 500 processing device, and the following are the specific implementation steps of the method: A carrier 100 having a carrying surface 110 is provided, and the carrying surface 110 is used to fix the battery cell 500 and lay the welding strip 400, so that the welding strip 400 is located on the battery cell 500 and contacts the battery cell 500; multiple battery cells 500 are fixed on the carrying surface 110 by vacuum adsorption or bonding, and the laying density of the welding strip 400 matches the number of grid lines of the battery cell 500; multiple battery cells 500 are arranged along a first direction and share the same set of welding strips 400 to form a battery string. Exemplarily, the carrying surface 110 is a plane or an arc surface: when the carrying surface 110 is a plane, the battery cells 500 are arranged in a straight line, and the first direction is a straight line direction parallel to the carrying surface 110; when the carrying surface 110 is an arc surface, the battery cells 500 are arranged in a circumferential direction, and the first direction is an arc direction.

[0049] A pressure mechanism 200 having a pressure member 210 is provided, wherein a contact surface 211 of the pressure member 210 has a self-heating capability or a heat-conducting capability; in one embodiment, the self-heating capability is achieved by a built-in heating wire in the pressure member 210, or by connecting a heat-conducting material to an external heat source to transfer heat; The pressure member 210 is moved along a first direction relative to the carrying surface 110, and during the movement, pressure is applied to the welding ribbon 400 through the contact surface 211; the pressure member 210 is rotatable, and the contact surface 211 is arranged on the peripheral side of the pressure member 210 and the contact surface 211 is in a circular arc shape, so that the contact surface 211 can roll and apply pressure on the welding ribbon 400; or, the pressure member 210 is rotatable, and the contact surface 211 is arranged on the peripheral side of the pressure member 210 and the contact surface 211 is in a circular arc shape; the carrier 100 is rotatable, and the carrying surface 110 is arranged on the peripheral side of the carrier 100 and the carrying surface 110 is in a circular arc shape, so that when the carrying surface 110 and the contact surface 211 rotate synchronously in opposite directions, the welding ribbon 400 and the battery cell 500 are squeezed by the contact surface 211 and the carrying surface 110, so that the welding ribbon 400 is welded to the battery cell 500.

[0050] In one embodiment, the pressure-applying method may be rolling pressure: the pressure-applying member 210 is a pressure roller 212, and the contact surface 211 is arc-shaped and is arranged on the circumference of the pressure roller 212; the pressure roller 212 rotates around the axis so that the contact surface 211 rolls and applies pressure on the welding strip 400; when the bearing surface 110 is a plane, the pressure roller 212 moves and rolls along the first direction; when the bearing surface 110 is an arc surface, the pressure roller 212 and the carrier 100 rotate synchronously in opposite directions (such as the pressure roller 212 rotates counterclockwise and the carrier 100 rotates clockwise).

[0051] In another embodiment, the pressure application method may be surface contact pressure: the pressure member 210 is a flat plate structure, and the contact surface 211 is a plane; the pressure member 210 moves along the first direction, and periodically presses down and lifts up during the movement, so that the welding strip 400 is pressurized and welded in sections.

[0052] Before welding, the welding strip 400 is preheated by the preheating mechanism 300: the preheating mechanism 300 forms a preheating area 310 on the carrying surface 110, and the preheating area 310 is located on one side of the first direction of the welding area 220; in one embodiment, infrared heating or laser heating is used to heat the welding strip 400 in the preheating area 310 to reach a preset preheating temperature; The positions of the preheating mechanism 300 and the pressure mechanism 200 are relatively fixed; or the positions of the preheating area 310 and the welding area 220 are relatively fixed, so that the preheating area 310 and the welding area 220 move synchronously along the first direction; the preheated welding strip 400 moves into the welding area 220 along with the carrier 100, receives the extrusion and heating of the pressure member 210, and realizes welding with the battery cell 500.

[0053] Furthermore, the pressure member 210 and the carrier 100 are rotated to apply pressure in coordination; when the carrier 100 is a cylindrical structure and the bearing surface 110 is an arc surface, the carrier 100 is rotated around the axis; the pressure member 210 is a pressure roller 212, and the contact surface 211 and the bearing surface 110 rotate synchronously in opposite directions (such as the carrier 100 rotates clockwise and the pressure roller 212 rotates counterclockwise), so that the solder strip 400 continuously enters the soldering area 220 between the contact surface 211 and the bearing surface 110; the linear speed of the soldering area 220 is controlled by the rotation speed to ensure that the solder strip 400 is heated and pressurized evenly.

[0054] In other embodiments, the battery cell 500 and the welding strip 400 can also be arranged in such a manner that the welding strip 400 is arranged on the carrying surface 110 of the carrier 100, and the battery cell 500 is arranged on the welding strip 400, and the pressure member 210 acts on the battery cell 500, so that the battery cell 500 and the welding strip 400 are in close contact, and under the high temperature of the pressure member 210, the welding strip 400 is squeezed, and welding is achieved between the battery cell 500 and the welding strip 400.

[0055] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A battery cell processing device, characterized in that: include: A carrier (100), the carrier (100) having a carrying surface (110), the carrying surface (110) being used for arranging battery cells (500) and welding strips (400); A pressure applying mechanism (200), wherein the pressure applying mechanism (200) comprises: A pressure piece (210), the pressure piece (210) being movable relative to the bearing surface (110), the pressure piece (210) having a contact surface (211), the contact surface (211) being used to apply pressure to the welding strip (400) and the battery cell (500); the contact surface (211) having a self-heating capability or a heat-conducting capability, so as to weld the pressed welding strip (400) and the battery cell (500).

2. A battery cell processing device according to claim 1, characterized in that: The pressure member (210) has at least a degree of freedom of movement along a first direction, the first direction being the direction in which the battery cells (500) are arranged, so that the pressure member (210) can weld the welding strip (400) and the battery cells (500) along the first direction.

3. A battery cell processing device according to claim 2, characterized in that: The contact surface (211) is arranged on the circumferential side of the pressure-applying member (210) and the contact surface (211) is in an arc shape, and the pressure-applying member (210) is rotatable so that the contact surface (211) can roll and apply pressure; or The contact surface (211) is arranged on the circumferential side of the pressure member (210) and is in an arc shape. The pressure member (210) is rotatable so that the contact surface (211) can roll and apply pressure. The bearing surface (110) is arranged on the circumferential side of the carrier (100) and is in an arc shape. The carrier (100) is rotatable so that when the bearing surface (110) and the contact surface (211) rotate synchronously in opposite directions, the welding strip (400) and the battery cell (500) are squeezed by the contact surface (211) and the bearing surface (110) so that the welding strip (400) is welded to the battery cell (500).

4. A battery cell processing device according to any one of claims 1 to 3, characterized in that: Also includes: a preheating mechanism (300), the preheating mechanism (300) being formed with a preheating area (310) on the carrier (100), the preheating area (310) being capable of accommodating at least a portion of the soldering strip (400), the preheating mechanism (300) being used to preheat the soldering strip (400) in the preheating area (310), so that the preheated soldering strip (400) is pressed onto the battery cell (500) by the pressure mechanism (200) and is welded to the battery cell (500); A welding area (220) is formed between the bearing surface (110) and the contact surface (211), and the preheating area (310) is located on the side of the welding area (220) in a first direction, the first direction being the arrangement direction of the battery cells (500).

5. A battery cell processing device according to claim 4, characterized in that: The preheating mechanism (300) and the pressure applying mechanism (200) are relatively fixed in position; or, A welding area (220) is formed between the bearing surface (110) and the contact surface (211), and the preheating area (310) and the welding area (220) are relatively fixed in position.

6. A battery cell processing method, characterized in that: include: Providing a carrier (100), the carrier (100) having a carrying surface (110), the carrying surface (110) being used for arranging battery cells (500) and welding strips (400); A pressure mechanism (200) is provided, the pressure mechanism (200) having a pressure piece (210), the pressure piece (210) being movable relative to the bearing surface (110), the pressure piece (210) having a contact surface (211), the contact surface (211) applying pressure to the welding strip (400) and the battery cell (500); The contact surface (211) is made to have self-heating capability or heat-conducting capability, so that the pressed welding strip (400) and the battery cell (500) can be welded.

7. A battery cell processing method according to claim 6, characterized in that: The pressure member (210) has at least a degree of freedom of movement along a first direction, the first direction being the direction in which the battery cells (500) are arranged, so that the pressure member (210) can weld the welding strip (400) and the battery cells (500) along the first direction.

8. A battery cell processing method according to claim 7, characterized in that: The contact surface (211) is arranged on the peripheral side of the pressure member (210) and the contact surface (211) is in an arc shape, so that the pressure member (210) can rotate, and the contact surface (211) can roll and apply pressure; or, The contact surface (211) is arranged on the circumference of the pressure member (210) and the contact surface (211) is in an arc shape, so that the pressure member (210) can rotate; the bearing surface (110) is arranged on the circumference of the carrier (100) and the bearing surface (110) is in an arc shape, so that the carrier (100) can rotate, so that when the bearing surface (110) and the contact surface (211) rotate synchronously in opposite directions, the welding strip (400) and the battery cell (500) are squeezed by the contact surface (211) and the bearing surface (110), so that the welding strip (400) is welded to the battery cell (500).

9. A battery cell processing method according to any one of claims 6 to 8, characterized in that: Also includes: A preheating mechanism (300) is provided, so that the preheating mechanism (300) forms a preheating area (310) on the carrier (100), and the preheating area (310) can at least accommodate a portion of the soldering strip (400), so that the soldering strip (400) in the preheating area (310) is preheated, so that the preheated soldering strip (400) is pressed onto the battery cell (500) by the pressure mechanism (200) and is welded to the battery cell (500).

10. A battery cell processing method according to claim 6, characterized in that: The welding strip (400) is arranged on the battery cell (500), and the welding strip (400) is pressed against the battery cell (500) and welded; or The battery cell (500) is arranged on the welding strip (400), and the battery cell (500) is pressed against the welding strip (400) and welded.

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