Battery cell bonding method and battery cell bonding production line

Abstract

The invention belongs to the technical field of battery production, and discloses a battery cell bonding method and a battery cell bonding production line, the battery cell bonding method comprises the steps of pre-fixing, glue filling and glue curing, the pre-fixing comprises the steps of preventing a cooling plate, placing a battery cell on a first profiling surface of the cooling plate, and enabling the side wall of the battery cell to be in contact with the first profiling surface; according to the battery cell bonding method, the bonding efficiency of the battery cell can be improved, and the situation that the battery cell is damaged before the battery cell is placed on the first profiling surface can be avoided. The battery cell is pressed on the first profiling surface, glue filling comprises the step of injecting glue into a gap between the side wall of the battery cell and the first profiling surface, and glue curing comprises the step of irradiating ultraviolet rays and / or blowing air to the glue until the glue is cured. And part of glue is cured in advance.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a battery core bonding method and a battery core bonding production line. Background Art

[0002] The battery cell will release a lot of heat during the charging and discharging process. In order to cool the battery cell, a cooling plate is usually set to absorb the heat generated by the battery cell. For cylindrical battery cells, the following is usually used: Figure 1 The serpentine cooling plate shown has a cylindrical battery cell bonded to each concave surface 110' of the serpentine cooling plate, so that the side wall of the cylindrical battery cell fits tightly with the concave surface 110' of the serpentine cooling plate to improve the cooling effect of the cooling plate on the cylindrical battery cell.

[0003] In the prior art, when bonding a cylindrical battery cell and a serpentine cooling plate, it is necessary to apply glue on the side wall of the cylindrical battery cell or the recessed surface 110' of the serpentine cooling plate, and then place the cylindrical battery cell on the recessed surface 110' to complete the bonding operation of a cylindrical battery cell and the serpentine cooling plate. However, the battery module includes multiple cylindrical battery cells, and therefore, the above bonding operation needs to be repeated multiple times. This one-by-one bonding method reduces production efficiency. In addition, this bonding method is prone to the problem of partial premature curing of the glue before the cylindrical battery cell is placed on the recessed surface 110'. Even if there is no premature curing problem, after placing the cylindrical battery cell on the recessed surface 110', it takes a long time to wait for all the glue to completely cure, which is also not conducive to improving production efficiency.

[0004] Therefore, it is urgent to propose a battery cell bonding method and a battery cell bonding production line to solve the above technical problems. Summary of the invention

[0005] The first object of the present invention is to provide a battery cell bonding method, which can improve the bonding efficiency of the battery cell and avoid the problem of premature solidification of part of the glue before the battery cell is placed on the first contoured surface.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A cell bonding method, comprising:

[0008] Pre-fixing: placing a cooling plate, the cooling plate comprising a plurality of first contoured surfaces, the first contoured surfaces being adapted to the shape of the side walls of the battery cells, placing the battery cells on the first contoured surfaces, making the side walls of the battery cells contact the first contoured surfaces, and pressing the battery cells onto the first contoured surfaces;

[0009] Glue filling: inject glue into the gap between the side wall of the battery cell and the first contoured surface;

[0010] Glue curing: Expose the glue to ultraviolet light and / or blow air until the glue cures.

[0011] Optionally, the battery cell is a cylindrical battery cell, and the glue filling step includes: facing the side wall of the battery cell away from the cooling plate upward, and applying glue on the side wall of the battery cell away from the cooling plate, so that the glue flows along the side wall of the battery cell to the gap, completing the first glue filling.

[0012] Optionally, the glue filling step includes: after completing the first glue filling, moving the battery cell and / or the cooling plate along the radial direction of the battery cell so that the battery cell and the cooling plate are misaligned, and the moving distance is a preset distance. After reaching a preset time, the battery cell and / or the cooling plate are reset.

[0013] A second object of the present invention is to provide a battery cell bonding production line, which can improve the bonding efficiency of battery cells.

[0014] To achieve this object, the present invention adopts the following technical solutions:

[0015] The battery cell bonding production line includes a pre-fixing device and a glue filling device. The pre-fixing device is used to press the battery cell onto the cooling plate, and the glue filling device is used to apply glue on the battery cell.

[0016] Optionally, the battery cell bonding production line further comprises a glue curing device, and the glue curing device is used to cure the glue.

[0017] Optionally, the battery cell bonding production line also includes a multi-axis robot, which is used to pick up and place the cooling plate, and the multi-axis robot is also used to pick up and place the battery cells.

[0018] Optionally, the battery cell bonding production line further includes a flipping mechanism, which is used to flip the cooling plate and the battery cell.

[0019] Optionally, the battery cell bonding production line further includes a conveying mechanism, and the conveying mechanism is used to convey the cooling plate and the battery cells.

[0020] Optionally, the pre-fixing device includes a first pressing plate and a second pressing plate, the cooling plate and the battery cell can be arranged between the first pressing plate and the second pressing plate, and the first pressing plate and the second pressing plate are configured to press the battery cell onto the cooling plate.

[0021] Optionally, the battery cell bonding production line further includes a glue filling station, and the glue filling device is arranged at the glue filling station.

[0022] Beneficial effects:

[0023] The battery cell bonding method provided by the present invention, before bonding the battery cell and the cooling plate, first places the battery cell on the first contoured surface of the cooling plate, so that the side wall of the battery cell contacts the first contoured surface, and the battery cell is pressed on the first contoured surface, and then a glue filling step is performed to inject glue into the gap between the side wall of the battery cell and the first contoured surface, so as to achieve the effect of bonding multiple battery cells to the cooling plate at the same time. Compared with the method of bonding multiple battery cells to the cooling plate one by one in the prior art, the battery cell bonding method provided by the present invention effectively improves the bonding efficiency, and the battery cell bonding method provided by the present invention can also avoid the problem of partial glue curing in advance before the battery cell is placed on the first contoured surface; in addition, in the battery cell bonding method provided by the present invention, after the glue is injected into the gap between the side wall of the battery cell and the first contoured surface, ultraviolet rays and / or air are irradiated to the glue, so that all the glue in the gap can be quickly cured, further saving the battery cell bonding time, and having the effect of further improving the bonding efficiency.

[0024] The battery cell bonding production line provided by the present invention comprises a pre-fixing device and a glue filling device, wherein the pre-fixing device can press the battery cell onto the cooling plate, and the glue filling device is used to apply glue on the battery cell, that is, the battery cell bonding production line can first pre-fix the battery cell and the cooling plate, and then bond the battery cell and the cooling plate. Compared with the prior art in which multiple battery cells are bonded to the cooling plate one by one, the battery cell bonding production line provided by the present invention can effectively improve the bonding efficiency between the battery cell and the cooling plate, and can also avoid the problem of premature solidification of part of the glue before the battery cell is placed in the bonding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a serpentine cooling plate in the prior art;

[0026] Figure 2 is a schematic structural diagram of a cooling plate provided in this embodiment;

[0027] Figure 3 is a structural schematic diagram of a battery cell bonding production line provided in this embodiment;

[0028] Figure 4 This is a schematic diagram of the state in which the first pressing plate and the second pressing plate clamp the cooling plate and multiple battery cells in this embodiment. Figure 1 ;

[0029] Figure 5 is a schematic structural diagram of the first pressing plate provided in this embodiment;

[0030] Figure 6 is a schematic structural diagram of the second pressing plate provided in this embodiment;

[0031] Figure 7 This is a second schematic diagram of the state in which the first pressing plate and the second pressing plate clamp the cooling plate and the multiple battery cells in this embodiment;

[0032] Figure 8 is a top view of the pre-fixing assembly in this embodiment before being turned over;

[0033] Fig. 9 It is a top view of the pre-fixing assembly after being turned over in this embodiment.

[0034] In the figure:

[0035] 110', concave surface;

[0036] 100, cooling plate; 110, first contour surface; 200, battery cell; 210, terminal column; 300, first pressing plate; 310, second contour surface; 400, second pressing plate; 410, third contour surface; 420, glue coating hole; 10, loading station; 20, glue filling station; 30, curing station; 40, unloading station; 50, conveying mechanism; 61, battery cell incoming tray; 62, cooling plate incoming tray; 70, multi-axis robot; 80, flipping mechanism. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] This embodiment provides a battery cell bonding method, which can improve the bonding efficiency of the battery cell and avoid the problem of partial glue curing in advance before the battery cell is placed on the first contoured surface.

[0042] Specifically, Figure 2 As shown, the battery cell bonding method includes:

[0043] Pre-fixation: placing a cooling plate 100 (which may be a liquid cooling plate or a water cooling plate), the cooling plate 100 includes a plurality of first contoured surfaces 110, the first contoured surfaces 110 are adapted to the shape of the side walls of the battery cells 200, placing the battery cells 200 on the first contoured surfaces 110, making the side walls of the battery cells 200 contact the first contoured surfaces 110, and pressing the battery cells 200 on the first contoured surfaces 110. It should be noted that the number of battery cells 200 may be equal to the number of first contoured surfaces 110, that is, a battery cell 200 is pressed on each first contoured surface 110, or the number of battery cells 200 may be less than the number of first contoured surfaces 110, that is, a battery cell 200 is pressed on some of the first contoured surfaces 110, while no battery cell 200 is pressed on another part of the first contoured surfaces 110, depending on actual use requirements;

[0044] Glue filling: injecting glue into the gap between the side wall of the battery cell 200 and the first contoured surface 110;

[0045] Glue curing: Expose the glue to ultraviolet light and / or blow air until the glue cures.

[0046] The battery cell bonding method provided in the present embodiment, before bonding the battery cell 200 and the cooling plate 100, firstly places the battery cell 200 on the first contoured surface 110 of the cooling plate 100, so that the side wall of the battery cell 200 contacts the first contoured surface 110, and presses the battery cell 200 on the first contoured surface 110, and then performs a glue filling step, so that the glue is injected into the gap between the side wall of the battery cell 200 and the first contoured surface 110, so as to achieve the effect of bonding multiple battery cells 200 to the cooling plate 100 at the same time, which is different from the prior art of bonding multiple battery cells 200 to the cooling plate 100 one by one. Compared with the above method, the battery cell bonding method provided in the present embodiment effectively improves the bonding efficiency, and the battery cell bonding method provided in the present embodiment can also avoid the problem of premature solidification of part of the glue before the battery cell 200 is placed on the first contoured surface 110; in addition, in the battery cell bonding method provided in the present embodiment, after the glue is injected into the gap between the side wall of the battery cell 200 and the first contoured surface 110, the glue is irradiated with ultraviolet rays and / or blown, so that all the glue in the gap can be quickly solidified, which further saves the bonding time of the battery cell 200 and has the effect of further improving the bonding efficiency.

[0047] Optionally, the glue curing step in this embodiment uses ultraviolet irradiation to accelerate the curing of the glue and shorten the bonding time of the battery cell 200.

[0048] Optionally, the pre-fixing step includes: before pressing the battery cell 200 onto the first contoured surface 110, aligning the terminal posts 210 of the plurality of battery cells 200, so that after the plurality of battery cells 200 are bonded to the cooling plate 100, the heights of the terminal posts 210 of the plurality of battery cells 200 are the same, and when the bus is welded to the terminal posts 210 of the two battery cells 200, it can be ensured that the bus is in full contact with the two terminal posts 210, thereby improving the stability and reliability of the connection between the bus and the terminal posts 210.

[0049] Furthermore, the method for aligning multiple terminal posts 210 includes: when placing the cooling plate 100 and multiple battery cells 200, the cooling plate 100 and the multiple battery cells 200 are placed upright on the same horizontal plane (at this time, the first contoured surface 110 of the cooling plate 100 is perpendicular to the horizontal plane), and the terminal posts 210 of the multiple battery cells 200 are all facing the same side (that is, the multiple terminal posts 210 are all set upward or all set downward), thereby achieving the effect of aligning the terminal posts 210 of the multiple battery cells 200. Compared with placing the cooling plate 100 horizontally, placing the cooling plate 100 upright eliminates the operation of aligning the multiple battery cells 200 one by one, thereby further improving the bonding efficiency of the battery cells 200.

[0050] Furthermore, in order to further improve the alignment accuracy of multiple terminal posts 210, when the battery cells 200 are placed upright, the terminal posts 210 of the multiple battery cells 200 are placed upright on a horizontal plane (that is, the multiple terminal posts 210 are all set downward) to avoid the problem of low alignment accuracy of the terminal posts 210 due to large dimensional errors of individual battery cells 200.

[0051] Optionally, the battery cell 200 is a cylindrical battery cell, and the glue filling step includes: facing upward the side wall of the battery cell 200 facing away from the cooling plate 100, and applying glue on the side wall of the battery cell 200 facing away from the cooling plate 100, so that the glue flows downward along the side wall of the battery cell 200, and under the action of the siphon effect, flows to the gap between the battery cell 200 and the first contoured surface 110, completing the first glue filling. Compared with injecting glue into the gap between the battery cell 200 and the first contoured surface 110, this glue filling method simplifies the glue coating operation and further improves the bonding efficiency of the battery cell 200.

[0052] Furthermore, the battery cell bonding method provided in this embodiment also includes: after pressing the battery cell 200 onto the first contoured surface 110, flipping the cooling plate 100 and the battery cell 200 90° so that the side wall of the battery cell 200 facing away from the cooling plate 100 is set upward, and then performing a glue filling step.

[0053] Optionally, the glue filling step includes: after completing the first glue filling, moving the battery cell 200 along the radial direction of the battery cell 200, at this time the cooling plate 100 is fixed, so that the battery cell 200 and the cooling plate 100 are misaligned, and the moving distance is a preset distance. After reaching a preset time, the battery cell 200 and the cooling plate 100 are reset to complete the secondary glue filling, so as to achieve the effect that the gap between the battery cell 200 and the first contoured surface 110 can be completely filled with glue, thereby improving the firmness of the bonding between the battery cell 200 and the cooling plate 100, and also improving the heat transfer efficiency between the battery cell 200 and the cooling plate 100. Of course, in other embodiments, the cooling plate 100 can also be moved to fix the battery cell 200, and the battery cell 200 and the cooling plate 100 can also be misaligned. After a preset time, the cooling plate 100 can be reset; or, the battery cell 200 and the cooling plate 100 can be moved at the same time. After a preset time, the battery cell 200 and the cooling plate 100 can be reset. It should be noted that if the battery cell 200 and the cooling plate 100 are moved at the same time, the moving directions of the battery cell 200 and the cooling plate 100 need to be opposite, or, the moving directions of the battery cell 200 and the cooling plate 100 can be the same, but the preset distances of their movement are different, as long as the battery cell 200 and the cooling plate 100 are misaligned.

[0054] Further, the preset distance is 1 mm-5 mm, and illustratively, the preset distance can be 1 mm, 2.5 mm or 5 mm, etc., so that the battery cell 200 and the first contour surface 110 are slightly offset, so that the glue on the side wall of the battery cell 200 flows to the gap between the battery cell 200 and the first contour surface 110, and it is also convenient to reset the battery cell 200. The preset time can be 10s, 20s or 30s, etc., so that the gap between the battery cell 200 and the first contour surface 110 is completely filled with glue.

[0055] Optionally, the above-mentioned movement of the battery cell 200 along the radial direction of the battery cell 200 may be horizontal movement, vertical movement, or inclined movement. In this embodiment, in order to simplify the operation, the battery cell 200 is moved horizontally.

[0056] This embodiment also provides a battery cell bonding production line, which can improve the bonding efficiency of the battery cell 200 .

[0057] Specifically, Figure 3 As shown, the battery cell bonding production line includes a pre-fixing device and a glue filling device, the pre-fixing device is used to press the battery cell onto the cooling plate, and the glue filling device is used to apply glue on the battery cell.

[0058] The battery cell bonding production line includes a pre-fixing device and a glue filling device. The pre-fixing device can press the battery cell onto the cooling plate, and the above-mentioned pre-fixing step is completed by the pre-fixing device. The glue filling device is used to apply glue on the battery cell, and the above-mentioned glue filling step is completed by the glue filling device, that is, the battery cell bonding production line can first pre-fix the battery cell and the cooling plate, and then bond the battery cell and the cooling plate. Compared with the prior art of bonding multiple battery cells to the cooling plate one by one, the battery cell bonding production line provided in this embodiment can effectively improve the bonding efficiency between the battery cell and the cooling plate, and can also avoid the problem of premature solidification of part of the glue before the battery cell is placed in the bonding position.

[0059] Optionally, the glue filling device can be a glue gun or a glue brush, etc.

[0060] Optionally, the pre-fixing device includes a first pressing plate 300 and a second pressing plate 400, the first pressing plate 300 is located on the side of the cooling plate 100 away from the battery cell 200, and the second pressing plate 400 is located on the side of the battery cell 200 away from the cooling plate 100. Therefore, when performing the pre-fixing step, the cooling plate 100 is placed between the first pressing plate 300 and the second pressing plate 400, and then the battery cell 200 is placed on the first contoured surface 110. After all the battery cells 200 are placed, the first pressing plate 300 and the second pressing plate 400 are brought close to each other until the battery cell 200 is pressed against the first contoured surface 110 of the cooling plate 100.

[0061] Furthermore, if Figures 4 to 9 As shown, the first pressing plate 300 includes a second profiling surface 310, and the shape of the second profiling surface 310 is adapted to the surface of the cooling plate 100 on the side away from the battery cell 200. When the cooling plate 100 and the battery cell 200 are pressed between the first pressing plate 300 and the second pressing plate 400, that is, when the battery cell 200 is pressed on the first profiling surface 110, the second profiling surface 310 can be tightly fitted with the surface of the cooling plate 100 on the side away from the battery cell 200. This structural design can prevent the problem of displacement of the first pressing plate 300 relative to the cooling plate 100 when the cooling plate 100 and the battery cell 200 are pressed, and has the effect of improving the pressing effect on the cooling plate 100 and the battery cell 200, so that the side wall of the battery cell 200 can be tightly fitted with the first profiling surface 110, thereby improving the bonding effect between the battery cell 200 and the cooling plate 100.

[0062] Furthermore, if Figures 4 to 9 As shown, the second pressing plate 400 includes a third contoured surface 410, and the shape of the third contoured surface 410 is adapted to the surface of the battery cell 200 on the side facing away from the cooling plate 100. When the battery cell 200 is pressed against the first contoured surface 110, that is, when the battery cell 200 is pressed against the first contoured surface 110, the third contoured surface 410 can be tightly fitted with the surface of the battery cell 200 on the side facing away from the cooling plate 100. This structural design can prevent the second pressing plate 400 from being displaced relative to the battery cell 200 when the cooling plate 100 and the battery cell 200 are pressed, and can improve the stability of pressing the battery cell 200 against the first contoured surface 110, thereby improving the bonding effect between the battery cell 200 and the cooling plate 100.

[0063] Furthermore, if Figures 4 to 9 As shown, the number of the third contoured surfaces 410 is equal to and corresponds to the number of the battery cells 200 located on the same side of the cooling plate 100, that is, a second pressing plate 400 can be used to press the multiple battery cells 200 on the multiple first contoured surfaces 110 located on the same side of the cooling plate 100, thereby simplifying the operation of pressing the multiple battery cells 200 on the first contoured surfaces 110 located on the same side of the cooling plate 100, which has the effect of improving the bonding efficiency. Of course, in other embodiments, a second pressing plate 400 may be provided with n third contoured surfaces 410 (1≤n<the number of battery cells 200 located on the same side of the cooling plate 100), and when the multiple battery cells 200 are pressed on the multiple first contoured surfaces 110 located on the same side of the cooling plate 100, more than two second pressing plates 400 may be used for pressing.

[0064] It should be noted that if Figures 4 to 9As shown, in this embodiment, a cooling plate 100 and a plurality of battery cells 200 located on the same side of the cooling plate 100 are bonded. Therefore, when placing a plurality of battery cells 200, the plurality of battery cells 200 are respectively placed on a plurality of first contoured surfaces 110 located on the same side of the cooling plate 100, and then a first pressing plate 300 and a second pressing plate 400 are used to press the cooling plate 100 and the battery cells 200. In other embodiments, if a cooling plate 100 and a plurality of battery cells 200 located on both sides of the cooling plate 100 are to be bonded, when placing the battery cells 200, the plurality of battery cells 200 are respectively placed on a plurality of first contoured surfaces 110 located on both sides of the cooling plate 100, and then two second pressing plates 400 are used to press the cooling plate 100 and the battery cells 200, and the two second pressing plates 400 are respectively located on both sides of the cooling plate 100.

[0065] It should also be noted that the battery cell bonding method provided in this embodiment is mainly used for bonding cylindrical battery cells and cooling plates 100. The above-mentioned cooling plate 100 can adopt the serpentine cooling plate 100 currently commonly available on the market, that is, both side surfaces of the cooling plate 100 have multiple first contoured surfaces 110, and the multiple first contoured surfaces 110 located on the same side are arranged at intervals. The arrangement of the multiple battery cells 200 can be designed according to actual usage requirements, that is, the multiple battery cells 200 can be arranged on the same side of the cooling plate 100, or the multiple battery cells 200 can be arranged on both sides of the cooling plate 100.

[0066] Alternatively, if Figures 4 to 9 As shown, the second pressing plate 400 also includes a glue coating hole 420, which passes through the third contoured surface 410 and the surface of the second pressing plate 400 facing away from the battery cell 200, so that during the glue filling process, glue can be applied to the side wall of the battery cell 200 facing away from the cooling plate 100 through the glue coating hole 420.

[0067] Furthermore, if Figures 4 to 9 As shown, the extension direction of the glue application hole 420 is the same as the arrangement direction of the multiple battery cells 200 located on the same side of the cooling plate 100. Therefore, when the glue is applied to the side wall of the battery cell 200 facing away from the cooling plate 100, it can be applied in a linear manner along the extension direction of the glue application hole 420 at one time. Compared with the method of applying glue to each battery cell 200 one by one, this structural setting and gluing method have the effect of simplifying the gluing operation and improving the bonding efficiency.

[0068] Optionally, the battery cell bonding production line further includes a glue curing device, which is used to cure the glue. The glue curing step is completed by the glue curing device. In this embodiment, the glue curing device is an ultraviolet lamp.

[0069] Alternatively, if Figure 3As shown, the battery cell bonding production line also includes a battery cell incoming tray 61, a cooling plate incoming tray 62, a multi-axis robot 70 and a loading station 10. The battery cell incoming tray 61 is used to place the battery cells 200 before pre-fixation, and the cooling plate incoming tray 62 is used to place the cooling plates 100 before pre-fixation. The multi-axis robot 70 can be a six-axis robot or an eight-axis robot, etc. In the pre-fixing step, the placement of the cooling plate 100 and the placement of the battery cells 200 are both completed by the multi-axis robot 70, that is, the multi-axis robot 70 is used to take the cooling plate 100 on the cooling plate incoming tray 62, and place the cooling plate 100 on the loading station 10. The multi-axis robot 70 is also used to take the battery cells 200 on the battery cell incoming tray 61, and place the battery cells 200 on the first contouring surface 110.

[0070] Alternatively, if Figure 3 As shown, the cell bonding production line further includes a flipping mechanism 80. In the glue filling step, the flipping mechanism 80 is used to flip the cooling plate 100 and the cell 200 so that the side wall of the cell 200 facing away from the cooling plate 100 faces upward, so as to facilitate the application of glue on the upward side wall of the cell 200. In this embodiment, the flipping operation of the cooling plate 100 and the cell 200 is performed after aligning the plurality of terminal posts 210, that is, after aligning the terminal posts 210 of the plurality of cell 200, the flipping mechanism 80 flips the cooling plate 100 and the cell 200 by 90° so that the side wall of the cell 200 facing away from the cooling plate 100 faces upward.

[0071] It should be pointed out that the flipping mechanism 80 can be a common manipulator or other clamping drive device in the art, as long as it can realize the flipping operation.

[0072] Alternatively, if Figure 3As shown, the battery cell bonding production line also includes a conveying mechanism 50, which is used to convey the cooling plate 100 and the battery cell 200. Specifically, the battery cell bonding production line also includes a glue filling station 20, a curing station 30 and a material unloading station 40. The above-mentioned glue filling device is arranged on the glue filling station 20, and the glue curing device is arranged on the curing station 30. At the material loading station 10, after the multi-axis robot 70 places the battery cell 200 on the first contour surface 110, the first pressing plate 300 and the second pressing plate 400 press the battery cell 200 on the first contour surface 110 of the cooling plate 100, and then, the conveying mechanism 50 transfers the first pressing plate 300 and the second pressing plate 400 clamping the battery cell 200 and the cooling plate 100 to the glue filling station 20, and performs the glue filling step at the glue filling station 20. After the glue filling step is completed, the conveying mechanism 50 transfers the first pressing plate 300 and the second pressing plate 400 clamping the battery cell 200 and the cooling plate 100 to the curing station 30, and performs the glue curing step at the curing station 30. After the glue curing step is completed, the conveying mechanism 50 transfers the first pressing plate 300 and the second pressing plate 400 clamping the battery cell 200 and the cooling plate 100 to the unloading station 40, waiting to be rotated to the next production station.

[0073] Optionally, the conveying mechanism 50 may be a roller line or a conveyor belt, etc.

[0074] In combination with the cell bonding method provided in this embodiment, the main working process of the cell bonding production line provided in this embodiment is briefly described below. Figures 2 to 9 As shown:

[0075] S1. Pre-fixation: Place the first pressing plate 300 and the second pressing plate 400 upright on the loading station 10, so that the second profiling surface 310 and the third profiling surface 410 are arranged opposite and spaced apart; the multi-axis robot 70 grabs a cooling plate 100 on the cooling plate incoming tray 62, and places it upright on the loading station 10, so that the side of the cooling plate 100 facing the first pressing plate 300 is in contact with the second profiling surface 310; the multi-axis robot 70 grabs a plurality of battery cells 200 in sequence, and places the battery cells 200 upright on the loading station 10, so that the battery cells 200 are in contact with the first profiling surface 110 of the cooling plate 100, and the side of the battery cells 200 facing away from the cooling plate 100 is in contact with the third profiling surface 410; the first pressing plate 300 and the second pressing plate 400 are brought close to each other until the battery cell 200 is pressed against the first profiling surface 110, so as to form a pre-fixed assembly.

[0076] S2, glue filling: The conveying mechanism 50 conveys the pre-fixed assembly to the glue filling station 20, and the flipping mechanism 80 flips the pre-fixed assembly 90 degrees, so that the side wall of the battery cell 200 away from the cooling plate 100 faces upward. Figure 8 This is a top view of the pre-fixed component before flipping. Fig. 94 is a top view of the pre-fixed component after flipping (the glue hole 420 is set upward at this time); the conveying mechanism 50 conveys the pre-fixed component to the glue filling station 20, and glue is applied to the side wall of each battery cell 200 away from the cooling plate 100 along the arrangement direction of the multiple battery cells 200, so that the glue flows downward along the side wall of the battery cell 200, and flows to the gap between the battery cell 200 and the first contoured surface 110 under the action of the siphon effect, completing the first glue filling; along the radial direction ( Fig. 9 The flip mechanism 80 pushes the second pressing plate 400, so that the second pressing plate 400 drives the multiple battery cells 200 and the cooling plate 100 to move relative to each other, and the moving distance is 1mm-5mm. After the preset time is reached, the flip mechanism 80 drives the second pressing plate 400 to reset, so that the multiple battery cells 200 are reset, and the secondary glue filling is completed to form a bonding assembly.

[0077] S3, glue curing: the conveying mechanism 50 conveys the bonding assembly to the curing station 30, irradiates ultraviolet rays on two opposite sides of the battery cell 200, the irradiation position is the glue between the battery cell 200 and the first contour surface 110, and the irradiation time can be 8s, 10s or 15s, etc., until the glue between the battery cell 200 and the first contour surface 110 is completely cured to form a bonded product; the conveying mechanism 50 conveys the bonded product to the unloading station 40, and then moves the bonded product to the next production station.

[0078] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cell bonding method, characterized in that: include: Pre-fixing: placing a cooling plate (100), the cooling plate (100) comprising a plurality of first contoured surfaces (110), the first contoured surfaces (110) being adapted to the outer shape of the side wall of the battery cell (200), placing the battery cell (200) at the first contoured surfaces (110), making the side wall of the battery cell (200) contact the first contoured surfaces (110), and pressing the battery cell (200) onto the first contoured surfaces (110); Glue filling: injecting glue into the gap between the side wall of the battery core (200) and the first contoured surface (110); Glue curing: irradiating the glue with ultraviolet light and / or blowing air until the glue is cured.

2. The battery core bonding method according to claim 1, characterized in that: The battery cell (200) is a cylindrical battery cell, and the glue filling step comprises: placing the side wall of the battery cell (200) facing away from the cooling plate (100) upward, and applying the glue on the side wall of the battery cell (200) facing away from the cooling plate (100), so that the glue flows along the side wall of the battery cell (200) to the gap, thereby completing the first glue filling.

3. The battery core bonding method according to claim 2, characterized in that: The glue filling step comprises: after the first glue filling is completed, moving the battery cell (200) and / or the cooling plate (100) along the radial direction of the battery cell (200) so that the battery cell (200) and the cooling plate (100) are misaligned, the moving distance is a preset distance, and after reaching a preset time, the battery cell (200) and / or the cooling plate (100) are reset.

4. Battery cell bonding production line, characterized in that: The battery cell bonding production line comprises a pre-fixing device and a glue filling device, wherein the pre-fixing device is used to press the battery cell (200) onto the cooling plate (100), and the glue filling device is used to apply glue onto the battery cell (200).

5. The battery cell bonding production line according to claim 4, characterized in that: The battery cell bonding production line further comprises a glue curing device, and the glue curing device is used to cure the glue.

6. The battery cell bonding production line according to claim 4, characterized in that: The battery cell bonding production line further comprises a multi-axis robot (70), wherein the multi-axis robot (70) is used to pick up and place the cooling plate (100), and the multi-axis robot (70) is also used to pick up and place the battery cell (200).

7. The battery cell bonding production line according to claim 4, characterized in that: The battery cell bonding production line further comprises a flipping mechanism (80), wherein the flipping mechanism (80) is used to flip the cooling plate (100) and the battery cell (200).

8. The battery cell bonding production line according to claim 4, characterized in that: The battery cell bonding production line further comprises a conveying mechanism (50), wherein the conveying mechanism (50) is used to convey the cooling plate (100) and the battery cell (200).

9. The battery cell bonding production line according to claim 4, characterized in that: The pre-fixing device includes a first pressing plate (300) and a second pressing plate (400), the cooling plate (100) and the battery cell (200) can be arranged between the first pressing plate (300) and the second pressing plate (400), and the first pressing plate (300) and the second pressing plate (400) are configured to press the battery cell (200) onto the cooling plate (100).

10. The battery cell bonding production line according to claim 4, characterized in that: The battery core bonding production line further comprises a glue filling station (20), and the glue filling device is arranged at the glue filling station (20).

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