Welding equipment and welding methods

Abstract

This application discloses welding equipment and a welding method, relating to the field of battery processing technology. The welding equipment includes a feeding device, an information collection device, a correction device, and a welding device. The feeding device is used to transport rotatable battery cells. The information collection device is installed outside the feeding device and is used to obtain information about the welding area of the current collector disk on the battery cell passing by. The welding device is installed outside the feeding device and is used to weld the current collector disk on the battery cell passing by. The correction device is installed on the feeding device and is used to drive the battery cell to rotate according to the feedback information from the information collection device, so that the battery cell switches to the corresponding welding area according to a preset welding sequence for the welding device to perform welding. This design can realize high-speed flying welding operations without stopping the machine, greatly speeding up the welding cycle and improving welding efficiency.

Description

Technical Field

[0001] The present application relates to the field of battery processing technology, and in particular to welding equipment and welding methods. Background Art

[0002] Cylindrical batteries are a type of battery. During their production, the current collector plate must be welded to the inner wall of the cylindrical cell's casing. However, existing current collector plate welding equipment cannot achieve high-speed, non-stop welding. The cylindrical cell must remain stationary for a certain period of time before welding. Consequently, existing current collector plate welding equipment suffers from slow welding cycles and low welding efficiency. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide welding equipment and welding methods to solve the technical problems existing in the background technology.

[0004] To achieve the above technical objectives, the present application provides a welding device, including a feeding device, an information collection device, a deviation correction device and a welding device;

[0005] The feeding device is used to convey the rotatable battery core;

[0006] The information collection device is used to obtain information about the area to be welded on the current collecting plate of the battery cell passed by;

[0007] The welding device is used to weld the current collecting plates on the battery cells passing through;

[0008] The correction device is installed on the feeding device and is used to drive the battery cell to rotate according to the feedback information of the information acquisition device, so that the battery cell switches the corresponding area to be welded according to a preset welding sequence for the welding device to perform welding.

[0009] Furthermore, the deviation-correcting device includes a frame, a carrier holder, and a deviation-correcting component;

[0010] The frame is mounted on the feeding device;

[0011] The carrier holder is installed on the frame and is used to accommodate the battery cell carrier;

[0012] The deviation-correcting assembly is mounted on the frame and is used to drive the battery cells on the carrier holder to rotate.

[0013] Furthermore, the deviation-correcting assembly includes a card holder moving mechanism, a deviation-correcting mechanism, and a deviation-correcting moving mechanism;

[0014] The carrier card seat is movably mounted on the frame;

[0015] The deviation-correcting movement mechanism is mounted on the frame and connected to the deviation-correcting mechanism, and is used to drive the deviation-correcting mechanism to move closer to or away from the carrier seat;

[0016] The card seat moving mechanism is installed on the frame and connected to the carrier card seat, and is used to drive the carrier card seat to move upward so that the battery cell on the carrier card seat contacts the adjacent correcting mechanism;

[0017] The deviation-correcting mechanism is used to drive the contacted battery core to rotate.

[0018] Furthermore, the deviation-correcting mechanism includes a centering rotating member and a centering driving mechanism;

[0019] The centering rotating member allows the battery cell on the carrier holder to movably extend therein and to contact and abut against the current collecting plate on the extended battery cell;

[0020] The centering drive mechanism is connected to the centering rotating member and is used to drive the centering rotating member to rotate.

[0021] Furthermore, the centering rotating member is provided with a deviation-correcting through hole for the battery cell on the carrier holder to movably extend into;

[0022] A plurality of connecting blocks are provided in the circumferential direction of the deviation-correcting through hole;

[0023] The bottoms of the plurality of connection blocks are connected with compression plates that can contact and abut against the current collecting plates on the battery cells;

[0024] An avoidance gap is formed between adjacent connecting blocks to avoid the area to be welded on the battery core.

[0025] Furthermore, the card seat moving mechanism is connected to the carrier card seat through an elastic member.

[0026] Furthermore, the centering drive mechanism includes a centering rotary motor, a driving gear and a driven gear;

[0027] The driving gear is fixed on the output shaft of the centering rotating motor;

[0028] The driven gear is fixed on the centering rotating member and meshes with the driving gear.

[0029] Furthermore, the deviation-correcting device further includes a dust removal mechanism;

[0030] The dust removal mechanism is installed above the centering rotating member and is provided with a welding opening communicating with the deviation-correcting through hole of the centering rotating member.

[0031] Furthermore, it also includes a limiting device;

[0032] The limiting device is installed on the feeding device and is used to limit the freedom of the battery core.

[0033] Furthermore, the limiting device is installed on the carrier base and includes a limiting driver and a clamping claw;

[0034] The limit driver is connected to the clamping claw and is used to drive the clamping claw to clamp the battery core on the carrier holder.

[0035] Furthermore, the feeding device includes a feeding driver and a turntable;

[0036] The feeding driver is connected to the turntable and is used to drive the turntable to rotate;

[0037] The deviation correcting device is installed on the turntable.

[0038] Furthermore, the welding device includes a laser bracket, a laser generator, a first displacement drive mechanism and a second displacement drive mechanism;

[0039] The first displacement driving mechanism is connected to the laser bracket and is used to drive the laser bracket to move along a first straight line direction;

[0040] The second displacement driving mechanism is connected to the first displacement driving mechanism and is used to drive the first displacement driving mechanism to move along a second linear direction perpendicular to the first linear direction;

[0041] The laser bracket is provided with an inclined surface;

[0042] The laser generator is installed on the inclined surface of the laser bracket.

[0043] Furthermore, the information collection device is a visual detection device.

[0044] The present application also discloses a welding method, which is applied to the above-mentioned welding equipment, comprising the steps of:

[0045] The information of the area to be welded of the current collecting plate on the battery cell conveyed by the feeding device is obtained through the information collection device;

[0046] The battery cell is driven to rotate during the conveying process by a deviation correction device so that the area to be welded on the battery cell is in a preset initial state when the battery cell reaches the welding position;

[0047] The welding area on the battery cell passing through is welded by the welding device, wherein the battery cell is driven by the deviation correction device to switch the corresponding area to be welded according to a preset welding sequence when passing through the welding position.

[0048] As can be seen from the above technical solutions, the welding equipment designed in this application, wherein the information collection device can obtain information about the area to be welded on the collector plate of the battery cell passing through. The set deviation correction device can drive the battery cell to rotate during the transportation process according to the feedback information of the information collection device, so that the area to be welded on the battery cell is in a preset initial state when the battery cell reaches the welding position. When the battery cell is transported through the welding position, the battery cell can be driven to rotate so that the area to be welded on the battery cell can be switched according to the preset welding sequence for the welding device to perform welding, thereby realizing non-stop high-speed flying welding operation, greatly speeding up the welding cycle and improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0050] Figure 1 A schematic diagram of the overall structure of the welding equipment provided in this application;

[0051] Figure 2 A schematic diagram of the partial structure of the welding equipment provided in this application;

[0052] Figure 3 A three-dimensional diagram of the welding equipment provided in this application in a coordinated state between the deviation correction device and the limiting device;

[0053] Figure 4 A cross-sectional view of the welding equipment provided in this application in a coordinated state between the deviation correction device and the limiting device;

[0054] Figure 5 A three-dimensional diagram of the welding equipment provided in this application, in which the deviation correction device and the limiting device are in cooperation with each other and the dust removal mechanism is not provided;

[0055] Figure 6 A three-dimensional diagram of a welding device of the welding equipment provided in this application;

[0056] Figure 7 A flow chart of the welding method provided in this application;

[0057] In the figure: 100, feeding device; 200, correcting device; 300, limiting device; 400, information collection device; 500, welding device; 601, feeding device; 602, discharging device; 700, battery cell carrier; 11, turntable; 12, first fixed plate; 13, second fixed plate; 21, frame; 22, carrier card seat; 31, card seat moving mechanism; 311, first moving seat; 312, first guide roller; 32, correcting moving mechanism; 321, second moving seat; 322, second guide roller ; 4. Correction mechanism; 41. Centering rotating part; 410. Correction through hole; 411. Pressure plate; 412. Connecting block; 42. Centering drive mechanism; 421. Centering rotating motor; 422. Driving gear; 423. Driven gear; 51. Dust removal mechanism; 511. Dust removal cover; 512. Welding opening; 513. Negative pressure port; 52. Elastic part; 61. Limit driver; 62. Clamp; 71. Laser bracket; 72. First displacement drive mechanism; 73. Second displacement drive mechanism; 74. Laser generator. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the embodiments of the present application.

[0059] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0061] The embodiments of the present application disclose welding equipment.

[0062] See also Figure 1 , an embodiment of the welding equipment provided in the embodiments of the present application includes:

[0063] Feeding device 100, information collection device 400, deviation correction device 200 and welding device 500.

[0064] The feeding device 100 is used to convey rotatable battery cells.

[0065] The information collection device 400 is mounted outside the feeding device 100 and is used to obtain information about the areas to be welded on the current collector plates of the passing battery cells. The number of areas to be welded can be determined based on the actual current collector plate structure and welding requirements. For example, if the current collector plate has multiple flanges that fit the inner wall of the battery cell housing, then the area where each flange is located can be considered a welded area. For another example, if the current collector plate has a single flange, then several areas on this flange can be set as welded areas, without any specific restrictions.

[0066] The welding device 500 is installed outside the feeding device 100 and is used to weld the collecting plates on the passing battery cells; the correction device 200 is installed on the feeding device 100 and is used to drive the battery cells to rotate according to the feedback information of the information collection device 400, so that the battery cells switch the corresponding areas to be welded according to the preset welding sequence for the welding device 500 to perform welding.

[0067] The welding equipment designed in this application, wherein the information collection device 400 can obtain information about the area to be welded on the collector plate of the battery cell passing through. The correction device 200 is provided to drive the battery cell to rotate during the conveying process based on the feedback information of the information collection device 400, so that the area to be welded on the battery cell is in a preset initial state when the battery cell reaches the welding position. When conveyed through the welding position, the battery cell can be driven to rotate so that the area to be welded on the battery cell can be switched according to the preset welding sequence for welding by the welding device 500, thereby achieving high-speed flying welding operation without stopping the machine, greatly accelerating the welding cycle and improving welding efficiency.

[0068] The welding equipment of the present application can also be configured with a feeding device 601 and a discharging device 602, wherein the feeding device 601 is used to feed the battery cells to be welded into the feeding device 100, and the discharging device 602 is used to feed the battery cells that have been welded on the feeding device 100 out.

[0069] The above is the first embodiment of the welding device provided in the embodiment of the present application. The following is the second embodiment of the welding device provided in the embodiment of the present application. For details, please refer to Figures 1 to 6 .

[0070] Based on the solution of the above embodiment 1:

[0071] like Figure 3 As shown, further, in terms of the structural design of the correction device 200, it includes a frame 21, a carrier card seat 22 and a correction component;

[0072] The rack 21 is mounted on the feeding device 100, and the carrier holder 22 is mounted on the rack 21 for accommodating the battery cell carrier 700. Bearings can be provided in the battery cell carrier 700 so that the battery cell can rotate on the battery cell carrier 700. Of course, a corresponding rotating structure can also be provided on the carrier holder 22, and the battery cell carrier 700 can be placed on the rotating structure to achieve battery cell rotation. The rack 21 is fixed on the feeding device 100. It can be understood that the battery cell is driven to move by driving the rack 21 to move, thereby achieving the purpose of transporting the battery cell. The movable cooperation mode between the carrier holder 22 and the rack 21 can be a sliding cooperation of a slide rail, which is not specifically limited.

[0073] The deviation-correcting assembly is mounted on the frame 21 and is used to drive the battery cells on the carrier holder 22 to rotate.

[0074] like Figure 3 As shown, further, in terms of the design of the deviation correction component, it includes a card holder moving mechanism 31, a deviation correction mechanism 4 and a deviation correction moving mechanism 32;

[0075] The carrier card holder 22 is specifically movably mounted on the frame 21;

[0076] The correcting movement mechanism 32 is mounted on the frame 21 and connected to the correcting mechanism 4 to drive the correcting mechanism 4 to move closer to or away from the carrier holder 22;

[0077] The card holder moving mechanism 31 is installed on the frame 21 and connected to the carrier card holder 22, and is used to drive the carrier card holder 22 to move upward so that the battery cells on the carrier card holder 22 contact the adjacent correcting mechanism 4, and the correcting mechanism 4 is used to drive the contacted battery cells to rotate.

[0078] like Figure 3 As shown, further, the design of the deviation correction mechanism 4 includes a centering rotating member 41 and a centering driving mechanism 42; Figure 4 as well as Figure 5 As shown, the centering rotating member 41 allows the battery cells on the carrier holder 22 to be movably inserted and to contact and abut against the collecting plates on the inserted battery cells; and the centering driving mechanism 42 is connected to the centering rotating member 41 to drive the centering rotating member 41 to rotate.

[0079] like Figure 3As shown, further, with regard to the design of the centering rotating member 41, a correction through hole 410 is provided for the battery cell on the carrier holder 22 to movably extend into; a plurality of connecting blocks 412 are provided circumferentially within the correction through hole 410; the bottoms of the plurality of connecting blocks 412 are connected to a clamping plate 411 that can contact and abut against the current collecting plate on the battery cell; avoidance gaps are formed between adjacent connecting blocks 412 to avoid the area to be welded on the battery cell. It can be understood that a welding corresponding area is formed between adjacent connecting blocks 412 to avoid the corresponding area to be welded.

[0080] Before the information collection device 400 collects information about the current collecting plate on the battery cell in the area to be welded, the corrective movement mechanism 32 can move the centering rotatable member 41 away from the battery cell to avoid interfering with the information collection process. When corrective movement is required, the centering rotatable member 41 is moved to the corresponding battery cell position to facilitate lifting and inserting the battery cell. In this embodiment, the bottom of the corrective through-hole 410 can be chamfered to facilitate insertion of the upper end of the battery cell.

[0081] Furthermore, the present application also includes a limiting device 300, which is installed on the feeding device 100 and is used to limit the freedom of the battery cells, that is, to position and fix the battery cells. The battery cells passing through can use the limiting device 300 to limit their own freedom to ensure accurate information acquisition.

[0082] The working principle of the above-designed correction device 200 is as follows: before the information collection device 400 completes information collection, the centering rotating member 41 will not move directly above the battery cell due to the action of the correction moving mechanism 32, so as to avoid an empty space for the information collection device 400 to collect information; during the process of the information collection device 400 obtaining the position information of the area to be welded or after obtaining the position information of the area to be welded, the correction moving mechanism 32 can drive the centering rotating member 41 to move toward the battery cell (ultimately making the centering rotating member 41 move directly above the battery cell), and at the same time, the centering driving mechanism 42 can drive the centering rotating member 41 to rotate so that the welding corresponding area between the adjacent connecting blocks 412 corresponds to the position of the area to be welded of the current collecting plate on the battery cell; the holder moving mechanism 31 drives the carrier holder 22 to lift and move, thereby allowing the battery cell to enter the correction through hole 410, so that the current collecting plate on the battery is against the clamping plate 411. In addition, during the upward movement of the battery cell or after the upper end of the battery cell enters the correction through-hole 410, the limiting device 300 releases the restraining effect on the battery cell to facilitate the rotation of the battery cell; after the battery cell and the clamping plate 411 are abutted, the centering drive mechanism 42 drives the centering rotating member 41 to rotate, thereby driving the battery cell and the current collecting plate to rotate until the area to be welded is in a preset initial state, ready for subsequent laser welding. The working principle of the centering rotating member 41 and the current collecting plate is as follows: the centering rotating member 41 itself will set an initial posture, that is, when the centering rotating member 41 is not correcting the deviation, it will rotate to the set initial posture, that is, its own welding corresponding area is in a set posture. The centering drive mechanism 42 can determine the deviation angle between its own welding corresponding area and the currently detected collecting plate to be welded area by comparison based on the feedback information of the information collection device 400. After determining the deviation angle, the centering rotating part 41 can be driven to rotate so that the welding corresponding area corresponds to the area to be welded. After the welding is completed, the centering drive mechanism 42 drives the centering rotating part 41 to reset, that is, drives the centering rotating part 41 to rotate to the set initial posture, waiting for the next correction, and repeating this cycle.

[0083] like Figure 4 As shown, further, the card holder moving mechanism 31 is preferably elastically connected to the carrier card holder 22 via an elastic member 52, which can be a spring. The provision of the elastic member 52 can provide the carrier card holder 22 with a certain buffer displacement, thereby preventing the battery cells from being crushed due to excessive displacement.

[0084] like Figure 2 as well as Figure 4 As shown, further, the deviation-correcting device 200 further includes a first fixing plate 12 , and a first track groove (not shown) is provided on the first fixing plate 12 .

[0085] The card base moving mechanism 31 includes a first moving base 311, which is movably mounted on the frame 21 and connected to the carrier card base 22. The first moving base 311 and the frame 21 can be slidably engaged with each other via a slide rail, without limitation.

[0086] The first movable seat 311 is provided with a first guide roller 312 that extends into and moves along the first track groove to achieve lifting movement on the frame 21. It is understood that when the feeding device 100 drives the frame 21 to move, the first guide roller 312 on the first movable seat 311 connected to the frame 21 also moves along the first track groove. The change in the trajectory of the first track groove can then be used to cause the first movable seat 311 to lift, thereby allowing the battery cell to enter the correction through hole 410.

[0087] like Figure 2 as well as Figure 4 As shown, further, the deviation-correcting device 200 further includes a second fixing plate 13 , and a second track groove (not shown) is provided on the second fixing plate 13 .

[0088] The deviation correction moving mechanism 32 includes a second moving seat 321, which is movably mounted on the frame 21. The second moving seat 321 and the frame 21 can also be slidably matched through a slide rail, and the second moving seat 321 is specifically horizontally movably arranged above the carrier base 22.

[0089] The centering rotating member 41 can be specifically embedded in the second movable seat 321 and rotatably matched with the second movable seat 321 through a bearing member. Correspondingly, the centering driving mechanism 42 can also be installed on the second movable seat 321 and then connected to the centering rotating member 41.

[0090] The second movable seat 321 is provided with a second guide roller 322 that extends into and moves along the second track groove to enable movement on the frame 21. Similarly, it can be understood that when the feeding device 100 drives the frame 21 to move, the second guide roller 322 on the second movable seat 321 connected to the frame 21 also moves along the second track groove. The change in the track of the first track groove can then be used to cause the second movable seat 321 to move horizontally, thereby allowing the centering rotating member 41 to move directly above the battery cell.

[0091] Taking the track groove drive as an example, as the feeding device 100 is driven, the second movable seat 321 moves just in the direction close to the battery cell under the action of the second track groove, and during the movement, the centering drive mechanism 42 rotates the centering rotating part 41, and makes the welding corresponding area correspond to the position of the area to be welded; at the same time, during the movement of the second movable seat 321, the first movable seat 311 is acted upon by the first wheel track groove and moves upward, the battery cell enters the correction through hole 410, and the battery cell is against the clamping plate 411.

[0092] like Figure 4 As shown, the centering drive mechanism 42 is further designed to include a centering rotary motor 421, a driving gear 422, and a driven gear 423. The centering rotary motor 421 can be a servo motor that can rotate forward and backward and is mounted upside down on the second moving base 321.

[0093] The driving gear 422 is fixed to the output shaft of the centering rotary motor 421, and the driven gear 423 is fixed to the centering rotating member 41 and meshes with the driving gear 422. The centering rotary motor 421 drives the driving gear 422 to rotate, thereby driving the driven gear 423 to rotate, and ultimately driving the centering rotating member 41 to rotate.

[0094] like Figure 3 as well as Figure 4 As shown, the deviation correction device 200 further includes a dust removal mechanism 51 to remove dust generated during welding and improve the welding effect.

[0095] The dust removal mechanism 51 is installed above the centering rotating member 41, specifically on the second movable seat 321, and includes a dust removal cover 511. The dust removal cover 511 is provided with a welding opening 512 and a negative pressure port 513 connected to the correction through hole 410 of the centering rotating member 41. The welding opening 512 can allow the welding laser of the welding device 500 to pass through, and the negative pressure port 513 can be connected to a vacuum generator to play a dust removal role.

[0096] like Figure 4 As shown, further, with regard to the design of the limiting device 300, it is installed on the carrier base 22, and cooperates with the carrier base 22 and the frame 21 together. Specifically, it can be designed to include a limiting driver 61 and a clamp 62, and the limiting driver 61 is connected to the clamp 62 to drive the clamp 62 to clamp the battery cell on the carrier base 22. The limiting driver 61 can specifically be a finger cylinder, which is connected to the clamp 62 to drive the clamp 62 to open and close, so as to achieve the limiting and fixing effect on the battery cell. In addition, since the battery cell shell will expand due to heat after welding and will have an interference fit with the correction through hole, the limiting device 300, in addition to preventing the battery cell from deflecting, can also clamp the battery cell again after the current collecting plate is welded, so that the battery cell as a whole can be smoothly removed from the correction through hole 410.

[0097] like Figure 2 As shown, further, with respect to the design of the feeding device 100 , in order to make the overall structure more compact, the feeding device 100 is preferably designed to include a feeding drive (not shown) and a turntable 11 .

[0098] The feed drive can be a conventional forward and reversible rotating motor connected to the turntable 11 to drive the turntable 11 to rotate; there are multiple correcting devices 200, which are circumferentially installed on the turntable 11, and the limiting devices 300 are the same number as the correcting devices 200, and correspond one-to-one with the correcting devices 200. Taking this as an example, the welding device 500 can be arranged on the outer peripheral side of the turntable 11. The first fixed plate 12 can be an annular plate structure, which is arranged below the turntable 11, and the first track groove is opened on the inner wall of the first fixed plate 12; and the second fixed plate 13 can be a circular disc structure, which is arranged above the turntable 11, and the second track groove is opened at the bottom of the second fixed plate 13.

[0099] The feeding device 100 can also be designed as a linear conveying device as needed. Taking this as an example, the welding devices 500 can be arranged on both sides of the linear conveying device.

[0100] like Figure 6 As shown, further, in terms of the design of the welding device 500 , it includes a laser bracket 71 , a laser generator 74 , a first displacement drive mechanism 72 and a second displacement drive mechanism 73 .

[0101] The first displacement drive mechanism 72 is connected to the laser bracket 71 and is used to drive the laser bracket 71 to move along a first linear direction. The second displacement drive mechanism 73 is connected to the first displacement drive mechanism 72 and is used to drive the first displacement drive mechanism 72 to move along a second linear direction perpendicular to the first linear direction. For example, if the first linear direction is the X-axis, then the second linear direction is also the Y-axis. The first displacement drive mechanism 72 and the second displacement drive mechanism 73 can be lead screw slides to facilitate the operator to adjust the position of the laser generator 74, without any specific limitation.

[0102] The laser bracket 71 is provided with an inclined surface, and the laser generator 74 is installed on the inclined surface of the laser bracket 71, so that the laser generator 74 can emit a light beam tilted downward.

[0103] In this application, four welding devices 500 can be provided, and each welding device 500 can weld one area to be welded in sequence. Of course, if the process conditions permit, one welding device 500 can also weld all four welding areas. The specific number of welding devices 500 can be adaptively adjusted according to the actual process conditions.

[0104] The welding process is as follows: when the battery cell enters the welding range of the welding device 500, one of the areas to be welded on the current collecting plate on the battery cell is located at the welding starting position. At this time, the welding device 500 can start welding from the welding starting position, and in this process, the centering drive mechanism 42 drives the battery cell to continue to rotate, and then switches the area to be welded to complete the welding work of each area to be welded.

[0105] Furthermore, the information collection device 400 is a visual detection device, specifically a CCD camera.

[0106] The present application also provides a welding method, which is applied to the welding equipment of the above-mentioned embodiment 1 or embodiment 2, comprising the steps of:

[0107] S1, obtaining, through an information collection device, information about the area to be welded of the current collecting plate on the battery cell conveyed by the feeding device.

[0108] S2, driving the battery cell to rotate during the conveying process through the correction device, so that when the battery cell reaches the welding position, the area to be welded on it is in a preset initial state.

[0109] S3, welding the welding area on the battery cell passing through by the welding device, wherein, when the battery cell passes through the welding position, it is driven by the correction device to switch the corresponding area to be welded according to the preset welding sequence.

[0110] Regarding step S1, taking the configuration of the limiting device 300 as an example, it can be understood that when collecting information about the area to be welded on the battery cell, the limiting device 300 limits the battery cell. Specifically, the limiting driver 61 drives the clamping claw 62 to clamp and secure the battery cell to prevent the battery cell from moving and affecting the accuracy of the information obtained. Of course, the limiting device 300 can also be omitted, and the rotational damping of the battery cell carrier 700 can be set to a larger value to prevent the battery cell carrier 700 from rotating and affecting the accuracy of the information obtained.

[0111] As for step S2, it can be understood that, during the circulation of the battery cell after the information of the area to be welded is obtained, the clamp 62 releases the clamping of the battery cell under the drive of the limit driver 61, and the second movable seat 321 moves just in the direction close to the battery cell under the action of the second track groove, and in the process of movement, the centering drive mechanism 42 rotates the centering rotating part 41, and makes the welding corresponding area correspond to the position of the area to be welded. At the same time, during the movement of the second movable seat 321, the first movable seat 311 is acted upon by the first wheel track groove and moves upward, the battery cell enters the correction through hole 410, and the battery cell is against the clamping plate 411; furthermore, the centering drive mechanism 42 drives the battery cell to rotate, so that when the battery cell enters the welding range of the welding device 500, one of the areas to be welded of the collecting plate on the battery cell is located at the welding starting position.

[0112] Regarding step S3, it is understood that the welding device 500 begins welding from the welding starting position. During this process, the centering drive mechanism 42 drives the battery cell to continue rotating, thereby switching the welding area to complete the welding work in each area. For example, if multiple welding devices 500 are used, each time the welding range of the next welding device 500 is entered, the battery cell switches to the next welding area for welding.

[0113] The above is a detailed introduction to the welding equipment and welding method provided in this application. For those skilled in the art, according to the ideas of the embodiments of this application, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. Welding equipment, characterized in that, It comprises a feeding device (100), an information collecting device (400), a deviation correcting device (200), and a welding device (500); The feeding device (100) is used to convey rotatable battery cells; The information collection device (400) is used to obtain information about the area to be welded of the current collecting plate on the battery cell passed through; The welding device (500) is used to weld the current collecting plates on the battery cells passing through; The deviation correction device (200) is mounted on the feeding device (100) and is used to drive the battery core to rotate according to feedback information from the information collection device (400), so that the battery core switches the corresponding area to be welded according to a preset welding sequence for the welding device (500) to perform welding; The deviation-correcting device (200) comprises a carrier holder (22) and a deviation-correcting component; The carrier holder (22) is used to accommodate the battery cell carrier (700); The deviation correction component is used to drive the electric core on the carrier holder (22) to rotate; The deviation correction component comprises a card holder moving mechanism (31), a deviation correction mechanism (4) and a deviation correction moving mechanism (32); The carrier holder (22) is movably mounted on the frame (21); The deviation-correcting moving mechanism (32) is mounted on the frame (21) and connected to the deviation-correcting mechanism (4), and is used to drive the deviation-correcting mechanism (4) to move toward or away from the carrier seat (22); The card seat moving mechanism (31) is installed on the frame (21) and connected to the carrier card seat (22), and is used to drive the carrier card seat (22) to move upward, so that the battery cell on the carrier card seat (22) contacts the adjacent correction mechanism (4); The deviation-correcting mechanism (4) is used to drive the contacted battery core to rotate; The deviation-correcting mechanism (4) comprises a centering rotating member (41) and a centering driving mechanism (42); The centering rotating member (41) allows the battery cell on the carrier holder (22) to be movably inserted and to contact and abut against the current collecting disk on the inserted battery cell; The centering drive mechanism (42) is connected to the centering rotating member (41) and is used to drive the centering rotating member (41) to rotate.

2. The welding equipment according to claim 1, characterized in that The deviation-correcting device (200) comprises a frame (21); The frame (21) is mounted on the feeding device (100); The carrier card seat (22) is installed on the frame (21); The deviation-correcting component is mounted on the frame (21).

3. The welding equipment according to claim 1, characterized in that The centering rotating member (41) is provided with a deviation-correcting through hole (410) for the battery cell on the carrier holder (22) to movably extend into. A plurality of connecting blocks (412) are provided in the circumferential direction of the inner portion of the deviation-correcting through hole (410); The bottoms of the plurality of connection blocks (412) are connected to compression plates (411) capable of contacting and abutting against the current collecting plates on the battery cells; An avoidance gap is formed between adjacent connection blocks (412) to avoid the area to be welded on the battery core.

4. The welding equipment according to claim 1, characterized in that The card seat moving mechanism (31) is connected to the carrier card seat (22) via an elastic member (52).

5. The welding equipment according to claim 1, characterized in that The centering drive mechanism (42) comprises a centering rotary motor (421), a driving gear (422), and a driven gear (423); The driving gear (422) is fixed on the output shaft of the centering rotating motor (421); The driven gear (423) is fixed on the centering rotating member (41) and meshes with the driving gear (422).

6. The welding equipment according to claim 1, characterized in that The deviation-correcting device (200) further includes a dust removal mechanism (51); The dust removal mechanism (51) is installed above the centering rotating member (41) and is provided with a welding opening (512) communicating with the deviation-correcting through hole (410) of the centering rotating member (41).

7. The welding equipment according to claim 2, characterized in that Also includes a limiting device (300); The limiting device (300) is installed on the feeding device (100) and is used to limit the degree of freedom of the battery cell.

8. The welding device according to claim 7, characterized in that The limiting device (300) is mounted on the carrier base (22), and comprises a limiting driver (61) and a clamping claw (62); The limit driver (61) is connected to the clamp (62) and is used to drive the clamp (62) to clamp the battery core on the carrier holder (22).

9. The welding device according to claim 1, characterized in that The feeding device (100) comprises a feeding driver and a turntable (11); The feeding driver is connected to the turntable (11) and is used to drive the turntable (11) to rotate; The deviation-correcting device (200) is installed on the turntable (11).

10. The welding device according to claim 1, characterized in that The welding device (500) comprises a laser bracket (71), a laser generator (74), a first displacement drive mechanism (72), and a second displacement drive mechanism (73); The first displacement driving mechanism (72) is connected to the laser bracket (71) and is used to drive the laser bracket (71) to move along a first linear direction; The second displacement drive mechanism (73) is connected to the first displacement drive mechanism (72) and is used to drive the first displacement drive mechanism (72) to move along a second linear direction perpendicular to the first linear direction; The laser bracket (71) is provided with an inclined surface; The laser generator (74) is mounted on the inclined surface of the laser bracket (71).

11. The welding device according to claim 1, characterized in that The information collection device (400) is a visual detection device.

12. A welding method, characterized in that The welding device according to any one of claims 1 to 11 comprises the steps of: Acquiring information about the area to be welded on the current collecting plate on the battery cell conveyed by the feeding device (100) through the information collection device (400); The battery core is driven to rotate during the conveying process by a deviation correction device (200), so that when the battery core reaches the welding position, the area to be welded on the battery core is in a preset initial state; The welding area on the battery cell passing through is welded by the welding device (500), wherein the battery cell is driven by the deviation correction device (200) when passing through the welding position to switch the corresponding area to be welded according to a preset welding sequence.

Images