Sealing nail welding line

Abstract

The utility model relates to the technical field of batteries, and discloses a sealing nail welding line which is characterized in that a nail feeding device is used for mounting a sealing nail to one end, provided with a liquid injection hole, of a cylindrical battery, a pre-welding device is located at the downstream of the nail feeding device and used for pre-welding the cylindrical battery, and a full-length welding device is located at the downstream of the pre-welding device and used for full-length welding of the cylindrical battery. The dust removal device is located at the downstream of the full welding device and comprises a sealing cavity, a dust removal nozzle arranged in the sealing cavity and a negative pressure suction part located above the sealing cavity, the dust removal nozzle is used for blowing the end face of the side, provided with the sealing nails, of the cylindrical battery, the negative pressure suction part is used for sucking flying dust in the sealing cavity, and the detection device is located at the downstream of the dust removal device. And the detection device is used for detecting and calibrating the cylindrical battery subjected to full-length welding. Therefore, the influence of welding slag and smoke dust on the detection structure of the detection device can be reduced, the detection precision is improved, the false detection probability is reduced, the cost waste and the production takt time loss are reduced, and the production efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cylindrical battery technical field especially is related to a sealing nail welding line. BACKGROUND

[0002] In the related art, after the sealing nail on the cylindrical battery is welded, residual smoke and sputtering material exist on the side of the sealing nail, and the cylindrical battery with the welded sealing nail needs to be detected for welding quality, however, the residual smoke and sputtering material on the side of the sealing nail can increase the probability of misjudgment in the detection process. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art. To this end, one purpose of the utility model is to provide a sealing nail welding line, which can reduce the probability of misjudgment in the subsequent detection process and improve the detection accuracy.

[0004] The application discloses a sealing nail welding line, comprising: a nail installation device, a pre-welding device, a full-welding device, a dust removal device, and a detection device, the nail installation device is used to install the sealing nail to one end of the cylindrical battery with a liquid injection hole, the pre-welding device is located downstream of the nail installation device and is used to pre-weld the cylindrical battery, the full-welding device is located downstream of the pre-welding device and is used to full-weld the cylindrical battery, the dust removal device is located downstream of the full-welding device, the dust removal device comprises: a sealed cavity, a dust removal nozzle arranged in the sealed cavity, and a negative pressure suction element located above the sealed cavity, the dust removal nozzle is used to blow the side end face of the cylindrical battery with the sealing nail, and the negative pressure suction element is used to suck the dust in the sealed cavity, and the detection device is located downstream of the dust removal device and is used to detect and calibrate the cylindrical battery with the full-welding.

[0005] According to the sealing nail welding line of the application, the dust removal device is arranged between the full-welding device and the detection device, the dust removal device can realize "blowing and sucking linkage", can reduce the influence of welding slag and smoke on the detection structure of the detection device, improve the detection accuracy, reduce the probability of misjudgment and wrong detection, reduce the cost waste and production rhythm loss, and further improve the production efficiency.

[0006] According to some embodiments of the application, the dust removal nozzle is a plurality of, each dust removal nozzle corresponds to a welding seam area of a cylindrical battery in the sealed cavity.

[0007] In the above technical solution, the dust removal nozzle can realize one-to-one blowing of multiple cylindrical batteries, which can further improve the blowing effect, reduce the influence of the welding slag attached to the end plate on the detection structure, and further improve the detection accuracy.

[0008] According to some embodiments of the present application, the sealing nail welding line further comprises: an upper cover device, the upper cover device is located upstream of the upper nail device and is used to cover the protective cover on one end of the cylindrical battery having the liquid injection hole.

[0009] In the above technical solution, before the upper nail device places the sealing nail into the liquid injection hole of the cylindrical battery, the protective cover is installed on the end of the cylindrical battery by the upper cover device, which can separate the shell from the sealing nail. Even if the sealing nail has a positioning deviation, the protective cover can separate the sealing nail from the shell, thereby reducing the probability of the positive electrode and the negative electrode of the cylindrical battery being overlapped due to the sealing nail, thereby reducing the probability of the cylindrical battery being short-circuited during the pre-welding process, reducing the safety hazard, and improving the safety and reliability of the pre-welding device.

[0010] According to some embodiments of the present application, the upper cover device comprises: a first driving group and an upper cover clamp, the first driving group is used to drive the upper cover clamp to switch between a first position and a second position, and the upper cover clamp is adapted to take the protective cover.

[0011] In the above technical solution, the first driving group and the upper cover clamp are provided, so that the upper protective cover of the upper cover device operates more simply and efficiently.

[0012] According to some embodiments of the present application, the sealing nail welding line further comprises: a lower cover device, the lower cover device is used to detach the protective cover on the cylindrical battery, and the lower cover device is located upstream of the full-welding device and downstream of the pre-welding device.

[0013] In the above technical solution, the upper cover device, the upper nail device, the pre-welding device, and the lower cover device can be sequentially arranged on the flow path of the cylindrical battery, so that the protective cover is covered before the upper nail and is detached after the pre-welding, which can ensure that the sealing nail does not cause the cylindrical battery to be short-circuited even if the positioning is poor, the welding is poor, or the sealing nail moves during the upper nail process and the pre-welding process, thereby further improving the safety of the pre-welding equipment, reducing the safety hazard, and detaching the protective cover before full-welding to avoid the influence of the protective cover on the full-welding operation.

[0014] According to some embodiments of the present application, the lower cover device comprises: a second driving group and a lower cover clamp, the second driving group is used to drive the lower cover clamp to switch between a third position and a fourth position, and the lower cover clamp is adapted to take the protective cover.

[0015] In the above technical solution, the second driving group and the lower cover clamp are provided, so that the lower protective cover of the lower cover device operates more simply and efficiently.

[0016] In the technical scheme, the transplanting mechanism is arranged between the upper cover device and the lower cover device, and is suitable for carrying the protective cover bin and driving the protective cover bin to switch between the first position and the third position, so that the protective cover in the protective cover bin at the first position can be used to supply the upper cover, and the protective cover in the protective cover bin at the third position can be recycled, that is, the protective cover is supplied and the protective cover is recycled through a cyclic movement of the protective cover bin, the utilization rate of the protective cover is improved, and when the protective cover needs to be cleaned, all the protective covers in the protective cover bin can be directly cleaned, and convenience is improved.

[0017] According to some embodiments of the present application, the sealing pin welding line further comprises a cleaning device located upstream of the upper pin device, the cleaning device being used to clean the side surface of the cylindrical battery having a liquid injection hole.

[0018] In the technical scheme, by cleaning the end surface of the cylindrical battery having a liquid injection hole before pre-welding, the quality of subsequent pre-welding and full welding can be improved, so as to improve the welding quality of the cylindrical battery, and the reliability and safety of the cylindrical battery with higher welding quality are higher.

[0019] According to some embodiments of the present application, the sealing pin welding line further comprises a sorting device located downstream of the detection device, and a sorting robot of the sorting device is used to sort the cylindrical battery marked to a good product discharge line or a defective product recycling line.

[0020] In the technical scheme, automatic sorting of good products and defective products can be realized, and sorting is performed based on the detection result with higher detection accuracy of the detection device, so as to improve production efficiency, reduce the probability of mis-sorting, and save production cost.

[0021] According to some embodiments of the present application, the sealing pin welding line further comprises a magnetic drive conveying belt, the magnetic drive conveying belt has a battery clamp and a magnetic drive guide rail, the magnetic drive guide rail is used to drive the movement of the battery clamp, the battery clamp is used to fix the cylindrical battery, and the cleaning device, the upper cover device, the upper pin device, the pre-welding device, the lower cover device, the full welding device, the dust removal device, the detection device and the sorting device are sequentially arranged in the flow direction of the battery clamp limited by the magnetic drive guide rail.

[0022] In the technical scheme, the battery clamp and the cylindrical battery in the battery clamp are driven to move synchronously by the magnetic drive guide rail, so as to improve the flow speed of the cylindrical battery, the higher flow speed can speed up the production rhythm, improve the production efficiency, and improve the transportation accuracy, so that the positioning accuracy of the cylindrical battery moving to the positions of the devices is higher, and the higher positioning accuracy can improve the production efficiency, the machining accuracy and the machining quality.

[0023] According to some embodiments of the present application, the battery clamp is provided with a protective cover positioning portion, the protective cover positioning portion is suitable for mounting a protective cover, the upper cover clamp of the upper cover device is suitable for taking the protective cover in the protective cover positioning portion in the first position, and the lower cover clamp of the lower cover device is suitable for taking the protective cover in the protective cover positioning portion in the third position.

[0024] In the above technical solution, the plurality of cylindrical batteries in the battery clamp can be arranged in an array, and the protective cover positioning portion is located on one side of the cylindrical batteries, so that the protective cover can circulate synchronously with the battery clamp. When the battery clamp moves to the position of the upper cover device, the protective cover on the protective cover positioning portion is grabbed by the upper cover clamp and mounted on the corresponding cylindrical battery. In the position of the lower cover device, the protective cover on the cylindrical battery is grabbed by the lower cover clamp and mounted back on the protective cover positioning portion. Through the synchronous circulation of the protective cover and the battery clamp, the difficulty of the upper cover action of the upper cover device and the difficulty of the lower cover action of the lower cover device are reduced, the production efficiency is further improved, and the requirement of high production rhythm is met.

[0025] According to some embodiments of the present application, the sealing nail welding line further comprises: a feeding device, the feeding device is located at the first end of the magnetic drive guide rail, and is used for connecting the cylindrical battery without welding sealing nails to the battery clamp.

[0026] In the above technical solution, the battery clamp, the cup holder and the cylindrical battery circulate synchronously, the global high-precision direct positioning provided by the magnetic drive guide rail eliminates the cumbersome secondary positioning mechanism of each station, so that the structure of the sealing nail welding line is extremely compact, and lays a foundation for realizing high-rhythm production.

[0027] The additional aspects and advantages of the present application will be partially given in the following description, some will become apparent from the following description, or will be understood by those skilled in the art through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

[0029] Figure 1 is a schematic diagram of a sealing nail welding line according to an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of an upper cover device or a lower cover device according to an embodiment of the present application;

[0031] Figure 3 is a schematic diagram of an upper nail device according to an embodiment of the present application;

[0032] Figure 4 is a schematic diagram of a pre-welding device according to an embodiment of the present application;

[0033] Figure 5 is a schematic diagram of a full welding device according to an embodiment of the present application;

[0034] Figure 6 is a schematic diagram of a dust cleaning device according to an embodiment of the present application.

[0035] Reference signs:

[0036] sealing pin welding line 100,

[0037] upper pin device 10, upper pin system 11, vibration disc 12,

[0038] pre-welding device 21, low-power laser galvanometer welding system 211, full welding device 22, high-power laser galvanometer welding system 221,

[0039] dust cleaning device 30, dust removal nozzle 31, negative pressure suction member 32,

[0040] detection device 40,

[0041] upper cover device 50, first driving group 51, upper cover clamp 52,

[0042] lower cover device 60, second driving group 61, lower cover clamp 62,

[0043] cleaning device 70, sorting device 81, feeding device 82, magnetic drive conveying belt 90,

[0044] battery clamp 101, protective cover 102. DETAILED DESCRIPTION

[0045] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0047] Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0048] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0049] In the application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0050] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0051] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0052] In the description of the application, the first feature "above" or "below" the second feature can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature therebetween.

[0053] In the description of the utility model, the first feature is "above", "upper" and "upper side" of the second feature, which includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.

[0054] "Multiple" appearing in the present application refers to two or more (including two).

[0055] The battery cell can be a secondary battery, which refers to a cylindrical battery cell that can be activated by charging after discharging.

[0056] The processed battery of the embodiment of the present application is a cylindrical battery, which includes a cylindrical shell, an end cover and an electrode assembly, the shell is used to define a containing space with a mounting port, the electrode assembly and the insulating cover are both arranged in the shell and the mounting port is sealed by the end cover.

[0057] Exemplarily, the shell is generally cylindrical, and one end of the shell is open to form a containing space with a mounting port, the electrode assembly and other functional components such as the insulating cover can be arranged in the containing space, the end cover is covered on the mounting port of the shell to isolate the internal environment of the cylindrical battery cell from the external environment, the shape of the end cover is adapted to the shape of the shell, the end cover can be supported by a material with certain hardness and strength (such as aluminum alloy, carbon fiber plate), and the end cover can effectively protect the safety and reliability of the internal components of the shell when being squeezed and collided.

[0058] In some embodiments, the end cover can also be provided with a pressure relief device for relieving the internal pressure when the internal pressure or temperature of the cylindrical battery cell reaches a threshold value. The material of the end cover can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not make special limitation.

[0059] In some embodiments, an insulating cover can also be arranged on the inner side of the end cover, which can be used to isolate the electrical connection components in the shell from the end cover to reduce the risk of short circuit. Exemplarily, the insulating cover can be plastic, rubber, etc. to achieve insulation protection.

[0060] The shell is a component used to cooperate with the end cover to form the internal environment of the cylindrical battery cell, wherein the formed internal environment can be used to accommodate the electrode assembly, the electrolyte and other components. The shell and the end cover can be independent components, and the mounting port can be arranged on the shell, and the end cover is covered on the opening to form the internal environment of the cylindrical battery cell. The shell can be a cylindrical body.

[0061] The electrode assembly is a component where electrochemical reactions occur in the cylindrical battery cell. One or more electrode assemblies can be contained within the case. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the cylindrical battery device, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0062] It should be noted that the processing process of the cylindrical battery at least includes preparation of the electrode assembly, packaging of the cylindrical battery, and testing of the cylindrical battery, and the packaging of the cylindrical battery includes electrode assembly into the case, welding of the tabs and the output terminals after entering the case, liquid injection of the cylindrical battery, formation after liquid injection, and plugging of the liquid injection hole. A plurality of processes.

[0063] Sealing pin welding is a key process in the manufacturing process of the cylindrical battery. This process aims to permanently seal the liquid injection hole on the end cover with an aluminum or aluminum alloy sealing pin to ensure that the internal electrolyte of the cylindrical battery does not leak, external environmental impurities do not enter, and a long-term stable high-pressure environment is maintained inside the cylindrical battery. Therefore, the welding quality directly determines the air tightness, safety and long-term cycle life of the cylindrical battery. Therefore, subsequent welding quality detection is required for the cylindrical battery after the completion of the sealing pin welding. However, during the welding process of the sealing pin, smoke and dust will be generated around the sealing pin, and welding spatter will be accompanied by the sealing pin. The residual smoke and dust around the sealing pin and the spatter will cause the misjudgment probability of the welding quality detection to increase.

[0064] Based on this, the present application provides a sealing pin welding line. By setting a dust cleaning device downstream of the full welding device and setting a detection device downstream of the dust cleaning device, the surface of the cylindrical battery with the liquid injection hole after full welding can be cleaned, and after the cleaning is completed, the detection device is used for detection, which can improve the detection precision and reduce the detection error. To avoid the cost waste and production rhythm loss caused by false detection and misjudgment, the production efficiency is taken into account.

[0065] Reference will now be made to Figures 1-6 The sealing pin welding line 100 according to the embodiments of the present application is described.

[0066] As Figure 1 shown, the present application discloses a sealing pin welding line 100, which comprises an upper pin device 10, a pre-welding device 21, a full-welding device 22, a dust cleaning device 30 and a detection device 40.

[0067] The upper nailing device 10 is used for installing the sealing nail to one end of the cylindrical battery having the liquid injection hole, the pre-welding device 21 is located downstream of the upper nailing device 10 and is used for pre-welding the cylindrical battery, and the full-welding device 22 is located downstream of the pre-welding device 21 and is used for full-welding the cylindrical battery.

[0068] As shown in Figure 3 The upper nailing device 10 includes an upper nailing system 11 and a vibrating disc 12. The upper nailing device 10 can be provided with one or more independent flexible upper nailing systems 11 to meet the requirement of high production rhythm and ensure reliability. Each upper nailing system 11 can be equipped with one or more adaptive suction nozzles and a plurality of upper nailing mechanical hands corresponding to the adaptive suction nozzles. The upper nailing mechanical hands drive the adaptive suction nozzles to suck the sealing nails and place the sealing nails on the liquid injection holes of the cylindrical batteries (for example, on the liquid injection holes of the end covers). Each upper nailing mechanical hand can be configured with a force sensor to detect the contact pressure in real time, so as to fine-tune the posture of the upper nailing mechanical hand, thereby realizing the upper nailing action in the flexible tactile feedback mode instead of the rigid impact mode, and avoiding the phenomena of nail jamming and nail turning.

[0069] As shown in Figure 4 The pre-welding device 21 includes at least one set of low-power laser galvanometer welding system 211, for example, two sets of low-power laser galvanometer welding system 211, which are used to process a plurality of cylindrical batteries in parallel. The pre-welding device 21 adopts a lower laser power and a shorter pulse time to point-weld a plurality of uniformly distributed and shallow connecting points between the sealing nails and the end covers, so as to realize the preliminary fixation of the sealing nails and prevent the sealing nails from deviating or falling off when they are transferred to the full-welding device 22.

[0070] As shown in Figure 5 The full-welding device 22 includes at least one set of high-power laser galvanometer welding system 221, for example, two sets of high-power laser galvanometer welding system 221. Each set of high-power laser galvanometer welding system 221 can simultaneously weld a plurality of cylindrical batteries, and can weld a continuous and closed annular weld on the joint between the sealing nails and the end covers. An optimized welding waveform and power curve can be used to ensure that the annular weld has sufficient penetration, air tightness and mechanical strength, and ensures the reliable sealing of the battery.

[0071] For example, in order to ensure the welding efficiency of the sealing nail welding line 100 and improve the production rhythm, the pre-welding device 21 can include four sets of low-power laser galvanometer welding system 211, which are used to pre-weld a group of 12 cylindrical batteries in parallel. The full-welding device 22 can include two sets of high-power laser galvanometer welding system 221, each of which is used to full-weld three cylindrical batteries, so as to realize the high production rhythm welding of simultaneously outputting 12 cylindrical batteries.

[0072] Further, after the pre-welding and full-welding are completed, welding slag will exist on the end cover where the sealing pin is located, and smoke will be generated on the circumferential side of the cylindrical battery, and both the welding slag (sputtering material) and the smoke will affect the detection of the welding quality by the subsequent detection device 40.

[0073] As Figure 6 described, the application further provides a dust removal device 30, which is located downstream of the full-welding device 22. The dust removal device 30 includes a sealed cavity (not shown in the figure), a dust removal nozzle 31 arranged in the sealed cavity, and a negative pressure suction member 32 located above the sealed cavity. The dust removal nozzle 31 is used to blow the side end face of the cylindrical battery having the sealing pin, and the negative pressure suction member 32 is used to suck the dust in the sealed cavity. The detection device 40 is located downstream of the dust removal device 30 and is used to detect and calibrate the cylindrical battery after full-welding.

[0074] Specifically, the sealed cavity is a closed chamber, and a plurality of dust removal nozzles 31 directed to the annular weld are arranged inside. The dust removal nozzles 31 can emit dry filtered compressed air to blow up the welding slag attached to the end cover of the cylindrical battery. Meanwhile, the negative pressure suction member 32 is arranged at the top end of the sealed cavity. The negative pressure suction member 32 is configured as a suction structure with large flow and high negative pressure to generate strong suction force at the top end of the sealed cavity, so as to suck away the welding slag blown up by the dust removal nozzles 31 and the smoke on the circumferential side of the cylindrical battery. Through the active cleaning of "blowing and sucking linkage", the area where the sealing pin of the cylindrical battery is located can be kept in a clean state. Therefore, when the detection device 40 located downstream of the dust removal device 30 detects the welding quality of the cylindrical battery, the environmental noise such as welding slag and smoke has less influence on the visual collection of the detection device 40.

[0075] The detection device 40 includes a 2D vision camera and a 3D laser profilometer. Through the detection scheme of the fusion of 2D vision and 3D laser profile, the 2D vision camera is used to detect the macroscopic defects of the weld surface, such as uneven color, spatter, crack, etc. The 3D laser profilometer accurately scans the three-dimensional morphology of the weld, quantitatively detects the key dimensions such as the weld reinforcement, width, and collapse, and comprehensively analyzes the two aspects of data to automatically determine the welding quality (OK / NG) of each sealing pin and calibrate the result to each cylindrical battery.

[0076] According to the sealing pin welding line 100 of the application, the dust removal device 30 is arranged between the full-welding device 22 and the detection device 40. The dust removal device 30 can realize "blowing and sucking linkage", which can reduce the influence of welding slag and smoke on the detection structure of the detection device 40, improve the detection accuracy, reduce the probability of false detection and wrong detection, reduce the cost waste and production rhythm loss, and further improve the production efficiency.

[0077] As Figure 6As shown, according to some embodiments of this application, there are multiple dust removal nozzles 31, and each dust removal nozzle 31 corresponds to a weld area of ​​a cylindrical battery located in a sealed cavity.

[0078] For example, the full-welding device 22 can simultaneously output 12 fully-welded cylindrical batteries, and the 12 cylindrical batteries are arranged in an array. Therefore, the number of dust removal nozzles 31 is 12, and they are set one-to-one with the cylindrical batteries.

[0079] In this way, one-to-one blowing of multiple cylindrical batteries can be achieved through the dust removal nozzle 31, which can further improve the blowing effect, reduce the impact of welding slag adhering to the end plate on the detection structure, and further improve the detection accuracy.

[0080] like Figure 2 As shown, according to some embodiments of this application, the sealing nail welding line 100 further includes: an upper cover device 50, which is located upstream of the upper nail device 10 and is used to cover the protective cover 102 on the end of the cylindrical battery having an injection hole.

[0081] It should be noted that during the welding of the sealing nails, even a tiny welding defect, such as pores, cracks, incomplete penetration, or burn-through, can lead to battery leakage, lithium plating, or even thermal runaway, causing serious safety accidents. After the cylindrical battery is filled with electrolyte, it is already charged, and the filling hole is open, waiting to be sealed. Sealing the filling hole is a crucial step in isolating the internal space of the casing from the external environment. The filling hole is located on the end cap, which can simultaneously lead out the positive and negative terminals of the cylindrical battery, or the casing can serve as the negative terminal, with the positive terminal led out separately from the end cap. However, the sealing nails are generally made of aluminum, and the distance between the positive and negative terminals of the cylindrical battery is very close. If there is a positional deviation when the sealing nails are welded on the end cap, it may cause overlap between the negative and positive terminals, resulting in a short circuit and posing a safety hazard.

[0082] In this application, an upper cover device 50 is provided upstream of the pre-welding device 21. Before the upper nail device 10 places the sealing nail into the liquid injection hole of the cylindrical battery, the upper cover device 50 installs the protective cover 102 to the end of the cylindrical battery. This can separate the casing from the sealing nail. Even if the sealing nail is misaligned, the protective cover 102 can separate the sealing nail from the casing, thereby reducing the probability of the sealing nail causing the positive and negative electrodes of the cylindrical battery to overlap. This reduces the probability of short circuit in the cylindrical battery during the pre-welding process, thereby reducing safety hazards and improving the safety and reliability of the pre-welding device 21.

[0083] It should be noted that the protective cover 102 can be configured as an insulating material piece, and should have good corrosion resistance. In addition to achieving insulation protection, the protective cover 102 also needs to be replaced regularly to reduce the probability of attachment and pollution of the cylindrical battery, and to reduce the probability of the protective cover 102 affecting the product yield.

[0084] The protective cover 102 can include a sleeve portion and an end cover portion at one end of the sleeve portion. The end cover portion can form a relief hole, and annular magnets can be arranged on the side surface of the end cover portion facing the cylindrical battery and the inner side surface of the sleeve portion facing the cylindrical battery, to ensure that the protective cover 102 can be stably fixed on the cylindrical battery for insulation protection, and to prevent the protective cover 102 from falling off due to vibration or operation errors during the operation of the pre-welding device 21. The protective cover 102 is always in the correct position, thereby providing continuous and reliable insulation protection for the cylindrical battery. The adsorption function of the annular magnets simplifies the installation and fixation process of the protective cover 102, and precise positioning and fixation of the protective cover 102 can be achieved without additional fixing devices or complex operations. This not only improves the operation efficiency, but also reduces the working intensity of the operator.

[0085] According to some embodiments of the present application, the upper cover device 50 includes a first driving group 51, an upper cover clamp 52, and a protective cover warehouse. The first driving group 51 is used to drive the upper cover clamp 52 to switch between a first position and a second position, and the upper cover clamp 52 is adapted to take the protective cover 102.

[0086] Specifically, the upper cover device 50 can include an upper cover rack, a first driving group 51 movably arranged on the upper cover rack, and an upper cover clamp 52. The power output part of the first driving group 51 is connected with the upper cover clamp 52. The upper cover clamp 52 can be switched between the first position and the second position under the driving of the first driving group 51, so as to take the protective cover 102 at the first position, and install the protective cover 102 to the end of the cylindrical battery having the liquid injection hole at the second position.

[0087] Therefore, the arrangement of the first driving group 51 and the upper cover clamp 52 makes the operation of the upper protective cover 102 of the upper cover device 50 more simple and efficient.

[0088] It should be noted that a plurality of cylindrical batteries can be arranged in an array, and the corresponding upper cover clamp 52 can also be arranged in an array to simultaneously take a corresponding number of protective covers 102. For example, the full-welding device 22 can simultaneously perform full-welding work on 12 cylindrical batteries, and 12 upper cover clamps 52 can simultaneously clamp 12 protective covers 102.

[0089] It can be understood that the first driving group 51 can include a first driving unit and a second driving unit, the first driving unit is used to drive the plurality of upper cover clamps 52 to switch between the first position and the second position synchronously, and the second driving unit is used to drive each upper cover clamp 52 to clamp or release the protective cover 102.

[0090] Referring to Figure 2 As shown, according to some embodiments of the present application, the sealing pin welding line 100 further comprises a lower cover device 60, the lower cover device 60 is used to detach the protective cover 102 on the cylindrical battery, and the lower cover device 60 is located upstream of the full welding device 22 and downstream of the pre-welding device 21.

[0091] Specifically, the upper cover device 50, the upper pin device 10, the pre-welding device 21 and the lower cover device 60 can be sequentially arranged on the flow path of the cylindrical battery, so as to cover the protective cover 102 before the upper pin, and cover the protective cover 102 after the pre-welding, which can ensure that the sealing pin does not cause short circuit of the cylindrical battery even if the positioning is poor, the welding is poor, or even the movement is not good during the upper pin process and the pre-welding process, so as to further improve the safety of the pre-welding equipment, reduce the safety hidden danger, and detach the protective cover 102 before full welding, so as to avoid the influence of the protective cover 102 on the full welding operation.

[0092] Of course, the lower cover device 60 of the embodiment of the present application can also be located downstream of the full welding device 22, that is, the protective cover 102 is detached after the full welding is completed.

[0093] According to some embodiments of the present application, the lower cover device 60 comprises a second driving group 61 and a lower cover clamp 62, the second driving group 61 is used to drive the lower cover clamp 62 to switch between a third position and a fourth position, and the lower cover clamp 62 is adapted to take the protective cover 102.

[0094] Specifically, the lower cover device 60 can include a lower cover rack, a second driving group 61 and a lower cover clamp 62 movably arranged on the lower cover rack, a power output part of the second driving group 61 is connected with the lower cover clamp 62, and the lower cover clamp 62 can be switched between the third position and the fourth position under the driving of the second driving group 61, so as to take the protective cover 102 located at one end of the liquid injection hole of the cylindrical battery at the fourth position, and place the protective cover 102 back to the protective cover warehouse at the third position.

[0095] Therefore, through the arrangement of the second driving group 61 and the lower cover clamp 62, the action of the lower cover device 60 to the protective cover 102 is more simple and efficient.

[0096] It should be noted that a plurality of cylindrical batteries can be arranged in an array, and the corresponding lower cover clamp 62 can also be arranged in an array to simultaneously take a corresponding number of protective covers 102. For example, the full welding device 22 can simultaneously perform full welding work on 12 cylindrical batteries, and 12 lower cover clamps 62 can simultaneously clamp 12 protective covers 102.

[0097] It can be understood that the second driving group 61 can include a third driving unit and a fourth driving unit. The third driving unit is used to drive the plurality of lower cover clamps 62 to switch between the third position and the fourth position synchronously. The fourth driving unit is used to drive each lower cover clamp 62 to clamp or release the protective cover 102.

[0098] As shown in Figure 1 According to some embodiments of the present application, the sealing pin welding line 100 further includes a cleaning device 70 located upstream of the upper pin device 10. The cleaning device 70 is used to clean the side surface of the cylindrical battery having the liquid injection hole.

[0099] Specifically, the cleaning device 70 can be a set of coaxial visual positioning systems and at least one set of high-speed laser galvanometer cleaning systems adapted thereto, such as four sets of high-speed laser galvanometer systems. The coaxial visual positioning system precisely positions the liquid injection hole area on each end cover and compensates for the position deviation caused by the assembly tolerance. Then, multiple sets of high-speed galvanometer cleaning systems guide the laser beam to scan the liquid injection hole area according to the preset path in a "one-to-many" mode (for example, if 12 cylindrical batteries are machined at a time, then each set of high-speed galvanometer laser cleans 3 cylindrical batteries), effectively removing electrolyte residues, oxides and organic pollutants through laser ablation (ablation) effect, providing a clean and active metal surface for subsequent pre-welding and full welding, and ensuring the welding quality.

[0100] It can be understood that the sealing pin welding is a key process for isolating the electrode assembly from the external environment. The sealing pin welding line 100 generally includes three key processes: liquid injection hole cleaning, pre-welding and full welding, which require corresponding cleaning device 70, pre-welding device 21 and full welding device 22 to be set up.

[0101] Therefore, by cleaning the surface of the cylindrical battery having the liquid injection hole before pre-welding, the quality of subsequent pre-welding and full welding can be improved, thereby improving the welding quality of the cylindrical battery, and the reliability and safety of the cylindrical battery with higher welding quality are higher.

[0102] In combination with Figure 1 According to some embodiments of the present application, the sealing pin welding line 100 further includes a sorting device 81 located downstream of the detection device 40. The sorting mechanical arm of the sorting device 81 is used to sort the calibrated cylindrical batteries to a discharging logistics line or a defective recycling line.

[0103] Exemplarily, the sorting manipulator has a synchronous grabbing capability of multiple cylindrical batteries, such as having multiple sub-grippers, each of which corresponds to grab one cylindrical battery, such as grabbing 12 cylindrical batteries at the same time, and can take out the 12 cylindrical batteries as a group according to the calibration result of the detection device 40: all cylindrical batteries calibrated as OK products are placed integrally on the discharging logistics line and transferred to the next process; and once there is a cylindrical battery calibrated as an NG product in the group, the corresponding sub-gripper can be independently controlled to separate the NG product and place it on the defective recovery line, realizing automatic sorting of good and defective products.

[0104] Thus, automatic sorting of good and defective products can be realized, and sorting can be performed based on the detection result of the detection device 40 with higher detection accuracy, which can improve production efficiency, reduce the probability of mis-sorting, and achieve the purpose of saving production cost.

[0105] As shown in Figure 1 According to some embodiments of the present application, the sealing nail welding line 100 further comprises a magnetic drive conveying belt 90, the magnetic drive conveying belt 90 has a battery clamp 101 and a magnetic drive guide rail for driving the battery clamp 101 to move, the battery clamp 101 is used to fix the cylindrical battery, and the cleaning device 70, the nail feeding device 10, the cover feeding device 50, the pre-welding device 21, the full-welding device 22, the cover feeding device 60, the dust cleaning device 30, the detection device 40, and the sorting device 81 are arranged in the flow direction of the battery clamp 101 defined by the magnetic drive guide rail in sequence.

[0106] Specifically, the magnetic drive guide rail of the magnetic drive conveying belt 90 comprises a guide rail and a stator winding array, and a permanent magnet magnetically driven by the stator winding array is arranged on the clamp body of the battery clamp 101, the magnetic drive guide rail defines a flow path of the cylindrical battery in the sealing nail welding line 100, which can be annular or linear, and the cover feeding device 50, the nail feeding device 10, the pre-welding device 21, the cover feeding device 60, the dust cleaning device 30, the detection device 40, and the sorting device 81 are arranged in sequence based on the flow direction of the cylindrical battery.

[0107] In this way, the battery clamp 101 and the cylindrical battery in the battery clamp 101 are driven to move synchronously by the magnetic drive guide rail, which not only improves the flow speed of the cylindrical battery, but also speeds up the production rhythm, improves the production efficiency, and improves the transportation accuracy, so that the positioning accuracy of the cylindrical battery moving to the position of each device is higher, and higher positioning accuracy can also improve the production efficiency and improve the machining precision and machining quality.

[0108] Wherein, the stator winding array on the magnetic drive guide rail cooperates with the permanent magnet to move, which can ensure the reliability and stability of the battery and the battery clamp 101 during synchronous movement, and there is no relative displacement during high-speed movement. For example, the central control system can implement feedback of the position of the permanent magnet (i.e. the position of the battery clamp 101) through the high-resolution magnetic grating ruler, realize micron-level positioning, and realize fast movement of the battery clamp 101 and the battery between multiple positions with higher accuracy, which can realize high-tact, high-precision transportation and effectively simplify the structure of the battery pole column welding line.

[0109] It can be understood that the welding quality of the sealing pin welding directly determines the air tightness, safety and long-term cycle life of the cylindrical battery. However, in order to ensure the welding quality, the current sealing pin welding results in a low production rhythm, which is difficult to meet the demand of high-speed production. However, the magnetic drive conveyor belt 90 is used to convey the cylindrical battery in the present application, and the above-mentioned upper cover device 50, upper pin device 10, pre-welding device 21, lower cover device 60, full-welding device 22, dust removal device 30, detection device 40 and sorting device 81 are provided, which can speed up the production rhythm and improve the production efficiency.

[0110] According to some embodiments of the present application, the battery clamp 101 is provided with a protective cover positioning portion, the protective cover positioning portion is adapted to install the protective cover 102, the upper cover clamp 52 of the upper cover device 50 is adapted to take the protective cover 102 in the protective cover positioning portion at the first position, and the lower cover clamp 62 of the lower cover device 60 is adapted to take the protective cover 102 in the protective cover positioning portion at the third position.

[0111] Specifically, the plurality of cylindrical batteries in the battery clamp 101 can be arranged in an array, and the protective cover positioning portion is located on one side of the cylindrical battery, so that the protective cover 102 can circulate with the battery clamp 101 synchronously. When the battery clamp 101 moves to the position of the upper cover device 50, the protective cover 102 on the protective cover positioning portion is grabbed by the upper cover clamp 52 and installed on the corresponding cylindrical battery. At the position of the lower cover device 60, the protective cover 102 on the cylindrical battery is grabbed by the lower cover clamp 62 and installed back on the protective cover positioning portion. Through the synchronous circulation of the protective cover 102 and the battery clamp 101, the difficulty of the upper cover action of the upper cover device 50 and the difficulty of the lower cover action of the lower cover device 60 are reduced, and the production efficiency is further improved to meet the requirement of high production rhythm.

[0112] According to some embodiments of the present application, the sealing pin welding line 100 further comprises a feeding device 82, which is located at the first end of the magnetic drive guide rail and is used to connect the cylindrical battery without welding sealing pin to the battery clamp 101.

[0113] Specifically, the feeding device 82 comprises a feeding manipulator and a fifth driving unit. The feeding manipulator has the same structure as the sorting manipulator, and can be driven by the fifth driving unit to connect the cylindrical battery and install the cylindrical battery into the battery clamp 101 at the head end of the magnetic driving guide rail. The battery clamp 101 flows in the magnetic driving guide rail, and each device corresponds to a position in the flow direction of the magnetic driving guide rail. After the sorting device 81 at the tail end position completes sorting, the battery clamp 101 without the cylindrical battery at the tail end position flows to the head end position again and waits for the feeding manipulator to place the cylindrical battery.

[0114] The fifth driving unit can be configured as a linear motor, and the feeding manipulator can also comprise a plurality of sub-grippers, for example, 12 positioning and clamping grippers designed to precisely match the shape of the cylindrical battery and the corresponding battery clamp 101, which can realize one-time grabbing of 12 cylindrical batteries together with their cup as a whole. This design ensures that the binding relationship between the cylindrical battery and the cup remains unchanged after entering the feeding device 82 from the previous process, thereby eliminating the data association disorder caused by individual separation from the physical root. Thus, the whole unit is precisely placed in the 12 corresponding battery clamps 101 on the magnetic driving transmission line.

[0115] Meanwhile, it can be understood that the battery clamp 101, the cup and the cylindrical battery flow synchronously, and the global high-precision direct positioning provided by the magnetic driving guide rail eliminates the cumbersome secondary positioning mechanism at each station, making the structure of the sealing pin welding line 100 extremely compact and laying a foundation for high-rhythm production.

[0116] In summary, the sealing pin welding line 100 of the embodiment of the present application provides a full-automatic cylindrical battery sealing pin welding line 100 based on magnetic driving guide rail conveying, which integrates active safety protection (upper cover device 50) and process quality optimization (cleaning device 70 and dust removal device 30). The insulation protection before the pin is welded, the flexible pin device 10, the dust removal device 30 after full welding, combined with the existing cleaning device 70, pre-welding device 21, full-welding device 22 and detection device 40, realize the synchronous improvement of welding efficiency and welding safety. And redefine the process route of the sealing pin welding line 100 as: feeding, cleaning, pinning, protecting cover 102, pre-welding, cover, full-welding, dust removal, detection, sorting and discharging.

[0117] Next, the sealing pin welding line 100 of the embodiment of the present application will be described in detail with reference to the accompanying drawings. Figure 1 The processing process of the sealing pin welding line 100 of the embodiment of the present application will be described in detail.

[0118] Taking that 12 cylindrical batteries can be processed at the same time as an example, the battery clamp 101, 12 cylindrical batteries and the protective cover 102 flow in the counterclockwise direction and flow through the cleaning device 70, the upper cover device 50, the upper nail device 10, the pre-welding device 21, the full-welding device 22, the lower cover device 60, the ash removal device 30, the detection device 40 and the sorting device 81 in turn and then are discharged.

[0119] The cleaning device 70 performs laser cleaning on the electrolyte injection hole area of the battery, after the laser cleaning is completed, the upper cover device 50 performs upper covering of the protective cover 102, the upper nail device 10 performs upper nailing of the sealing nail, the pre-welding device 21 performs pre-welding on the sealing nail, the full-welding device 22 performs full-welding on the sealing nail, the lower cover device 60 removes the protective cover 102 to the battery clamp 101, the ash removal device 30 performs ash removal, the detection device 40 performs pre-discharge detection, and the sorting device 81 performs discharge sorting based on the detection result of the detection device 40.

[0120] The cylindrical batteries are two rows, each row has 6 cylindrical batteries, the upper nail device 10 is two, which are sequentially arranged on the magnetic drive conveying belt 90, the first upper nail device 10 has two sets of upper nail systems 11, each set of upper nail system 11 can simultaneously nail three cylindrical batteries, so as to complete the upper nailing of the first three cylindrical batteries in each row of cylindrical batteries, after moving to the position of the second upper nail device 10, the two sets of upper nail systems 11 complete the upper nailing of the last three cylindrical batteries in each row of cylindrical batteries, the pre-welding device 21 has four sets of low-power laser galvanometer welding systems 211, each set of low-power laser galvanometer welding system 211 simultaneously welds 3 cylindrical batteries, and the pre-welding of 12 cylindrical batteries can be completed at the same time, the full-welding device 22 is two, each full-welding device has two sets of high-power laser galvanometer welding systems 221, and the battery clamp 101 sequentially flows through the two full-welding devices 22, so as to complete the full-welding of 12 cylindrical batteries, and the detection device 40 comprises a 2D vision camera and a 3D laser profiler which are sequentially arranged, so as to perform defect detection.

[0121] Other configurations and operations of the sealing nail welding line 100 according to the embodiments of the utility model are known to those skilled in the art, and will not be described here.

[0122] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0123] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A sealed pin weld line, characterized in that, The application relates to a sealing nail welding line for cylindrical batteries, which comprises: an upper nail device (10) for mounting the sealing nail to one end of the cylindrical battery with a liquid injection hole; a pre-welding device (21) located downstream of the upper nail device (10) and used for pre-welding the cylindrical battery; a full-welding device (22) located downstream of the pre-welding device (21) and used for full-welding the cylindrical battery; a dust removal device (30) located downstream of the full-welding device (22), which comprises a sealing cavity, a dust removal nozzle (31) arranged in the sealing cavity and used for blowing the side end face of the cylindrical battery with the sealing nail, and a negative pressure suction element (32) located above the sealing cavity and used for sucking dust in the sealing cavity; a detection device (40) located downstream of the dust removal device (30) and used for detecting and marking the cylindrical battery with completed full-welding.

2. The sealed pin weld line of claim 1, wherein, The dust removal nozzles (31) are multiple, and each dust removal nozzle (31) corresponds to the welding seam area of the cylindrical battery in the sealing cavity.

3. The sealed pin weld line of claim 1, wherein, The sealing nail welding line further comprises an upper cover device (50) located upstream of the upper nail device (10) and used for covering a protective cover (102) on the one end of the cylindrical battery with the liquid injection hole.

4. The sealed pin weld line of claim 3, wherein, The upper cover device (50) comprises a first driving group (51) and an upper cover clamp (52), the first driving group (51) is used for driving the upper cover clamp (52) to switch between a first position and a second position, and the upper cover clamp (52) is adapted to take the protective cover (102).

5. The sealed pin weld line of claim 3, wherein, The sealing nail welding line further comprises a lower cover device (60) used for disassembling the protective cover (102) on the cylindrical battery, which is located upstream of the full-welding device (22) and downstream of the pre-welding device (21).

6. The sealed pin weld line of claim 5, wherein, The lower cover device (60) comprises a second driving group (61) and a lower cover clamp (62), the second driving group (61) is used for driving the lower cover clamp (62) to switch between a third position and a fourth position, and the lower cover clamp (62) is adapted to take the protective cover (102).

7. The sealed pin weld line of claim 1, wherein, The sealing nail welding line further comprises a cleaning device (70) located upstream of the upper nail device (10), which is used for cleaning the side surface of the cylindrical battery with the liquid injection hole.

8. The sealed pin weld line of claim 1, wherein, The sealing nail welding line further comprises a sorting device (81) located downstream of the detection device (40), and a sorting mechanical arm of the sorting device (81) is used for sorting the marked cylindrical battery to a discharging logistics line or an unqualified recycling line.

9. The sealed pin weld line of any one of claims 1-8, wherein, The sealing nail welding line further comprises a magnetic drive conveying belt (90) having a battery clamp (101) for fixing a cylindrical battery and a magnetic drive guide rail for driving the battery clamp (101) to move, and the cleaning device (70), the upper cover device (50), the upper nail device (10), the pre-welding device (21), the lower cover device (60), the full-welding device (22), the ash cleaning device (30), the detection device (40), and the sorting device (81) are sequentially arranged in the flow direction of the battery clamp (101) defined by the magnetic drive guide rail.

10. The sealed pin weld line of claim 9, wherein, The battery clamp (101) is provided with a protective cover positioning portion adapted to mount a protective cover (102), the upper cover clamp (52) of the upper cover device (50) is adapted to take the protective cover (102) in the protective cover positioning portion at a first position, and the lower cover clamp (62) of the lower cover device (60) is adapted to take the protective cover (102) in the protective cover positioning portion at a third position.

11. The sealed pin weld line of claim 10, wherein, The sealing nail welding line further comprises a feeding device (82) located at the first end of the magnetic drive guide rail and used for connecting the cylindrical battery without welding sealing nails to the battery clamp (101).

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