Battery cover plate welding apparatus

Abstract

The application discloses a battery cover plate welding device, which comprises a conveying and feeding mechanism, an anti-explosion sheet feeding module, a moving module, a standby material carrier, a suction and feeding device for sucking the anti-explosion sheet and placing the anti-explosion sheet on a preset position on the surface of the battery cover plate reaching a feeding station, a conveying device for continuously conveying the battery cover plate to the feeding station and conveying the battery cover plate after feeding to a welding station, an anti-explosion sheet welding device, a conveying mechanism, a pre-dotting positioning clamp configured to switch between the movement of lifting at least one battery cover plate on the conveying belt to a first lifting position and retracting to a first initial position on the conveying belt, and a composite welding positioning clamp configured to switch between the movement of lifting at least one battery cover plate on the conveying belt to a second lifting position and retracting to a second initial position on the conveying belt.

Description

Battery cover welding equipment Technical Field

[0001] This invention relates to the field of battery production equipment technology, and in particular to a battery cover welding device. Background Technology

[0002] Explosion-proof sheets are key components for ensuring the safety of power batteries. It is crucial that the explosion-proof sheet can release pressure in time when the internal pressure of the battery increases beyond the safety threshold. Therefore, the stability of the explosion-proof sheet's burst value is a key factor in ensuring battery safety. In the current technology, there is a lack of integrated feeding and welding equipment for welding explosion-proof sheets for battery covers. Moreover, in the current production process of battery covers, the welding of explosion-proof sheets can result in a series of defects such as deformation, warping, incomplete welding, broken welding, and explosion points, which greatly reduces production efficiency and finished product quality. Summary of the Invention

[0003] This solution addresses the problems and needs raised above by proposing a battery cover welding device. Due to the adoption of the following technical features, it can achieve the above technical objectives and bring about several other technical benefits.

[0004] This invention proposes a battery cover welding device, comprising:

[0005] Material handling and feeding mechanisms, including:

[0006] The first conveying mechanism is used to convey the battery cover plate towards the direction of the transmission device;

[0007] The conveying mechanism includes a slide rail and a transition plate slidably disposed on the slide rail, with both ends of the slide rail respectively disposed below the ends of the first conveying mechanism and the transmission device that are close to each other;

[0008] A lifting mechanism, disposed on the surface of the transition plate, is used to rise when the transition plate moves to below the first conveying mechanism, so as to lift the battery cover by the supporting component and disengage the battery cover from the first conveying mechanism, and to descend when the transition plate moves to the first conveying mechanism to place the battery cover in the conveying device.

[0009] A supporting component, located in the lifting mechanism, is used to support the battery cover.

[0010] A conveying device for conveying a battery cover plate placed on its surface in a direction away from the first conveying mechanism;

[0011] The explosion-proof sheet feeding module includes:

[0012] Mobile module;

[0013] A material preparation carrier is used to load explosion-proof sheets. The material preparation carrier is located on the mobile module and can move between the material preparation station and the material picking station under the driving action of the mobile module.

[0014] A material suction and discharge device is installed at the material picking station to pick up the explosion-proof sheet and place it at a preset position on the surface of the battery cover plate that has arrived at the material discharge station.

[0015] The transmission device is used to continuously transmit the battery cover plate to the feeding station and transport the fed battery cover plate to the explosion-proof sheet welding device. The transmission device includes a drive unit and a conveyor belt connected thereto, and the battery cover plate with pre-placed explosion-proof sheets is arranged on the conveyor belt.

[0016] Explosion-proof sheet welding device, comprising:

[0017] A pre-marking positioning fixture is suspended on the conveyor belt and configured to switch between lifting at least one battery cover plate on the conveyor belt to a first lifting position and retracting it to a first initial position on the conveyor belt; wherein, the upper end of the pre-marking positioning fixture is provided with a laser pre-marking mechanism for spot welding when the battery cover plate is in the lifting position;

[0018] A composite welding positioning fixture is suspended across the conveyor belt and located downstream of the pre-marking positioning fixture. It is configured to switch between lifting at least one battery cover plate on the conveyor belt to a second lifting position and retracting it to a second initial position on the conveyor belt. The upper end of the composite welding positioning fixture is provided with a laser welding mechanism for performing full welding when the battery cover plate is in the lifting position.

[0019] In addition, the battery cover welding equipment according to the present invention may also have the following technical features:

[0020] In one example of the present invention, the first conveying mechanism or transmission device includes two transmission belts arranged side by side at intervals in the width direction, each transmission belt being sleeved on two drive shafts, and the drive shafts at the same end of the two transmission belts being collinear and driven to rotate by the drive mechanism.

[0021] The supporting component is located at the interval between the two transmission belts.

[0022] In one example of the invention, the supporting component includes:

[0023] A horizontal slide, extending horizontally;

[0024] Two sliders are provided, which are slidably fitted on the horizontal slide rail and connected to the drive mechanism respectively so as to move along the horizontal slide rail under the drive of the drive mechanism, thereby adjusting the distance between the two sliders.

[0025] Support plates are respectively provided on the surface of the slider, and the upper surface of the support plate is provided with a negative pressure adsorption mechanism for adsorbing the battery cover plate.

[0026] In one example of the present invention, the conveying and feeding mechanism further includes a flipping mechanism disposed on the first conveying mechanism, for flipping the battery cover plate input on one side, so that the battery cover plate is conveyed on the other side in a flipped state toward the direction of the conveying device.

[0027] In one example of the present invention, the material preparation carrier includes:

[0028] The vehicle body has multiple mold cavities arranged side by side along the length of the linear guide rail, and the bottom of each mold cavity is provided with a bottom sealing plate that can move up and down.

[0029] A lifting cylinder is located below each of the mold cavities, and the top of the lifting cylinder is connected to the bottom plate through a lifting block. It is used to lift the bottom plate when the moving module drives the mold cavity to the material picking station so as to drive the topmost explosion-proof piece in the mold cavity to rise to the height of the material picking station.

[0030] In one example of the present invention, the explosion-proof sheet feeding module further includes:

[0031] A lower vision mechanism is located between the material picking station and the material discharging station, and is used to capture a first image of the lower surface of the explosion-proof sheet when the explosion-proof sheet is picked up and moved to the material discharging station above the lower vision mechanism.

[0032] An upper vision mechanism is located above the feeding station and is used to capture a second image of the upper surface of the battery cover when the battery cover moves to the feeding station.

[0033] The feeding and discharging device is communicatively connected to the lower vision mechanism and the upper vision mechanism, and is configured to adjust the moving path based on the comparison difference between the first image, the second image and the pre-stored standard image data to place the explosion-proof sheet on the battery cover plate at the feeding station.

[0034] In one example of the present invention, the mobile module includes:

[0035] The linear guide rail has its two ends along its length located at the material preparation station and the material picking station, respectively.

[0036] A sliding bracket is slidably mounted on the linear guide rail and connected to the material preparation carrier;

[0037] A power cylinder is used to drive the sliding bracket to move the material preparation carrier along the length of the linear guide rail.

[0038] In one example of the present invention, both the pre-marking positioning fixture and the composite welding positioning fixture include:

[0039] The base has a positioning plate, which includes a first end face and a second end face disposed opposite to each other. At least one limiting cavity adapted to the battery cover is formed on the first end face, and at least one pre-drilled area or at least one full-welding area extending through the first end face is formed on the second end face.

[0040] At least one lifting device is configured to switch between lifting the battery cover to a first lifting position or a second lifting position engaging with the limiting cavity and retracting the battery cover to a first initial position or a second initial position disengaging from the limiting cavity.

[0041] In one example of the invention, a buffer device is also included.

[0042] It is mounted on the positioning plate, and when the battery cover is lifted to the lifting position, the buffer device is configured to abut against the end face of the battery cover to buffer the impact force between the battery cover and the first end face.

[0043] In one example of the invention, a displacement sensor is also included.

[0044] It is mounted on the positioning plate and configured to determine the accuracy and flatness of the battery cover's position within the limiting cavity based on measuring the distance between it and the battery cover.

[0045] The preferred embodiments of the invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the invention. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0047] Figure 1 is a front view of a battery cover welding device according to an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of a material handling and feeding mechanism according to an embodiment of the present invention;

[0049] Figure 3 is an enlarged view of the conveying mechanism in Figure 2;

[0050] Figure 4 is a structural schematic diagram of the supporting component in Figure 3, omitting the supporting plate;

[0051] Figure 5 is a schematic diagram of an explosion-proof sheet feeding module according to an embodiment of the present invention;

[0052] Figure 6 is the front view of Figure 5 without the upper visual mechanism;

[0053] Figure 7 is a stereoscopic view of Figure 5 with the upper visual mechanism removed from another angle;

[0054] Figure 8 is a front view of the explosion-proof sheet welding device according to an embodiment of the present invention;

[0055] Figure 9 is a perspective view of an explosion-proof sheet welding device according to an embodiment of the present invention;

[0056] Figure 10 is a front view of the pre-dot positioning fixture / composite welding positioning fixture according to an embodiment of the present invention;

[0057] Figure 11 is a top view of the pre-marking positioning fixture according to an embodiment of the present invention;

[0058] Figure 12 is a top view of the composite welding positioning fixture according to an embodiment of the present invention;

[0059] Figure 13 is a perspective view of the pre-marking positioning fixture according to an embodiment of the present invention;

[0060] Figure 14 is a partial exploded view of the pre-marking positioning fixture according to an embodiment of the present invention.

[0061] List of reference numerals in the attached diagram:

[0062] 1. Battery cover;

[0063] 210. Lower material handling and feeding mechanism;

[0064] 211. First conveying mechanism; 2111. Transmission belt; 2112. Drive shaft; 2113. Drive belt;

[0065] 212. Transport mechanism; 2121. Slide rail; 2122. Transition plate;

[0066] 213. Lifting mechanism;

[0067] 214. Supporting component; 2141. Horizontal slide rail; 2141a. Limiting groove; 2142. Slider; 2142a. Limiting block; 2143. Support plate; 2144. Negative pressure adsorption mechanism; 2145. High-pressure gas transmission pipe;

[0068] 216. Tilting mechanism; 2161. Tilting disc; 2162. Slot; 2163. Tilting drive device;

[0069] 220. Explosion-proof sheet feeding module;

[0070] 221. Moving module; 2211. Linear guide rail; 2212. Power cylinder;

[0071] 222. Material preparation carrier; 2221. Carrier body; 2221a. Hollowed-out structure; 2222. Mold cavity; 2223. Lifting cylinder; 2223a. Top head; 2224. Lifting block; 2225. Spare carrier; 2226. Linear rail; 2227. Laser displacement sensor;

[0072] 223. Suction and discharge device; 2231. Robotic arm; 2232. Negative pressure suction head;

[0073] 224. Transmission device;

[0074] 225. Lower visual mechanism;

[0075] 226. Upper vision mechanism; 2261. Camera; 2262. Vision support.

[0076] 230. Explosion-proof sheet welding device;

[0077] 232. Pre-marking positioning fixture;

[0078] 233. Composite welding positioning fixture;

[0079] 234. Base; 2341. Positioning plate; 23411. First end face; 23412. Second end face; 23413. Limiting cavity; 23414. Pre-dot area; 23415. Full soldering area; 23416. Positioning hole; 2342. Base plate; 2343. Column;

[0080] 235. Lifting device; 2351. Cylinder; 2352. Piston rod;

[0081] 236. Limiting post; 2361. Connecting section; 2362. Extension section; 2363. Bearing; 2364. Connecting shaft;

[0082] 237. Buffer device; 2371. Elastic element; 2372. Buffer column; 2373. Fastening cover;

[0083] 238. Receiving plate;

[0084] 239. Lifting plate;

[0085] 23A. Displacement sensor;

[0086] 23B. Laser pre-marking mechanism;

[0087] 23C. Laser welding mechanism;

[0088] 240, NG throwing mechanism;

[0089] 241. Mobile components;

[0090] 242. Material throwing frame. Detailed Implementation

[0091] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0092] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0093] A battery cover welding apparatus according to the present invention, as shown in FIG1, includes:

[0094] The lower conveying and feeding mechanism 210, as shown in Figures 2-4, includes:

[0095] The first conveying mechanism 211 is used to convey the battery cover plate in a direction close to the conveying device 224;

[0096] The conveying mechanism 212 includes a slide rail 2121 and a transition plate 2122 slidably disposed on the slide rail 2121. The two ends of the slide rail 2121 are respectively disposed below the ends of the first conveying mechanism 211 and the transmission device 224 that are close to each other.

[0097] A lifting mechanism 213 is provided on the surface of the transition plate 2122 and is used to rise when the transition plate 2122 moves to below the first conveying mechanism 211 so as to lift the battery cover plate by the supporting member 214 and disengage the battery cover plate from the first conveying mechanism 211, and to descend when the transition plate 2122 moves to the first conveying mechanism 211 so as to place the battery cover plate on the conveying device 224.

[0098] Supporting component 214 is provided on the lifting mechanism 213 and is used to support the battery cover plate;

[0099] The transmission device 224 is used to transport the battery cover plate placed on its surface in a direction away from the first conveying mechanism 211.

[0100] The explosion-proof sheet feeding module 220, as shown in Figures 5-7, includes:

[0101] Mobile module 221;

[0102] The material preparation carrier 222 is used to load explosion-proof sheets. The material preparation carrier 222 is located on the mobile module 221 and can move between the material preparation station and the material picking station under the driving action of the mobile module 221.

[0103] The suction and discharge device 223 is located at the material picking station and is used to pick up the explosion-proof sheet and place the explosion-proof sheet at a preset position on the surface of the battery cover plate 1 that has arrived at the material discharge station.

[0104] The conveying device 224 is used to continuously convey the battery cover plate 1 to the unloading station and then transport the unloaded battery cover plate 1 to the explosion-proof sheet welding device. The conveying device 224 includes a drive unit and a conveyor belt connected to it, with the battery cover plate 1 pre-placed with the explosion-proof sheet arranged on the conveyor belt. For example, the drive unit is a drive motor, the conveyor belt is mounted on a conveyor frame, and rollers are provided at both ends of the conveyor frame. The drive motor drives the rollers to rotate, thereby driving the conveyor belt.

[0105] The explosion-proof sheet welding device 230, as shown in Figures 8 to 14, includes:

[0106] A pre-marking positioning fixture 232 is suspended on the conveyor belt and configured to switch between lifting at least one battery cover plate 1 on the conveyor belt to a first lifting position and retracting it to a first initial position on the conveyor belt; wherein, the upper end of the pre-marking positioning fixture 232 is provided with a laser pre-marking mechanism 23B for spot welding when the battery cover plate 1 is in the lifting position.

[0107] A composite welding positioning fixture 233 is suspended across the conveyor belt and located downstream of the pre-marking positioning fixture 232. It is configured to switch between lifting at least one battery cover plate 1 on the conveyor belt to a second lifting position and retracting it to a second initial position on the conveyor belt. The upper end of the composite welding positioning fixture 233 is provided with a laser welding mechanism 23C for performing full welding when the battery cover plate 1 is in the lifting position.

[0108] The specific working principle is as follows: The first conveying mechanism 211 conveys the battery cover plate 1 from the previous processing table to the top of the slide rail 2121; the transition plate 2122 is moved along the slide rail 2121 to the bottom of the first conveying mechanism 211, and the lifting mechanism 213 is driven to rise, so that the supporting component 214 lifts the battery cover plate and removes the battery cover plate from the first conveying mechanism 211; the transition plate 2122 is driven to move the battery cover plate along the slide rail 2121 to the bottom of the first conveying mechanism 211; the lifting mechanism 213 is lowered, thereby placing the battery cover plate on the surface of the transmission device 224, and the transmission device 224 continues to move the battery cover plate away from the first conveying mechanism 211 and convey it to the next processing table.

[0109] This embodiment achieves downward lifting and transport through the raising and lowering of the lifting mechanism 213 and its cooperation with the transport mechanism 212. On one hand, the transmission accuracy is high, ensuring the battery cover 1 is accurately transported to a preset position on the next machine. On the other hand, the lifting mechanism 213 and transport mechanism 212 do not occupy the space above the machine and can avoid the movement path of the processing robot on the machine surface, thus not affecting the arrangement and movement of the processing robot on the machine surface. Therefore, this invention can accurately transport the product to the next machine without affecting the arrangement of the processing devices on the machine.

[0110] Because the present invention can smoothly transfer the product from the previous machine to the next machine, it can ensure that the finished battery cover plate 1 has a good surface quality.

[0111] The material preparation carrier 222 loads explosion-proof sheets at the material preparation station; the moving module 221 drives the material preparation carrier 222 to move to the material picking station; the suction and discharge device 223 picks up the explosion-proof sheets and places them at a preset position on the surface of the battery cover plate 1 that has arrived at the discharge station; finally, the conveying device 224 transports the discharged battery cover plate 1 to the welding station for a firm welding between the explosion-proof sheets and the battery cover plate 1. This embodiment realizes that machines replace manual operation, automatically completing the suction and discharge of explosion-proof sheets, greatly improving production efficiency; each suction and discharge action is programmed and standardized, ensuring the yield and quality of the finished product.

[0112] During laser welding of the battery cover 1, the battery cover 1 is conveyed to the position of the pre-marking positioning fixture 232 by the conveying device 224. The conveying device 224 stops conveying, and the pre-marking positioning fixture 232 lifts the battery cover 1 to the first lifting position. Then, the laser pre-marking mechanism 23B performs spot welding on the explosion-proof sheet on the battery cover 1. After the spot welding is completed, the pre-marking positioning fixture 232 retracts the battery cover 1 back to the first initial position with the conveyor belt, and the conveying of the battery cover 1 continues. Upon reaching the position of the composite welding positioning fixture 233, the conveying device 224 stops conveying. The composite welding positioning fixture 233 lifts the battery cover plate 1 to the second lifting position. Then, the laser welding mechanism 23C performs full welding on the explosion-proof sheet on the battery cover plate 1. After the full welding is completed, the composite welding positioning fixture 233 retracts the battery cover plate 1 back to the second initial position of the conveyor belt and continues to convey the battery cover plate 1 to the next process. The explosion-proof sheet welding device 230 repeats the above steps to weld the next battery cover plate 1. This explosion-proof sheet welding device 230 can realize a fully automatic pre-spot welding and full welding process, which can avoid a series of problems such as deformation, warping, incomplete welding, broken welding, and explosion points in the explosion-proof sheet welding process, greatly improving production efficiency and finished product quality. Moreover, it has a simple structure and high reliability.

[0113] This battery cover welding equipment avoids a series of problems such as deformation, warping, incomplete welding, broken welding, and explosion points when welding explosion-proof sheets, greatly improving production efficiency and finished product quality.

[0114] It should be noted that the explosion-proof plate is installed on the back of the battery cover BP.

[0115] In the embodiment shown in FIG2, the first conveying mechanism 211 or the transmission device 224 includes two transmission belts 2111 arranged side by side at intervals in the width direction. Each transmission belt 2111 is sleeved on two drive shafts 2112, and the drive shafts 2112 at the same end of the two transmission belts 2111 are collinear and driven to rotate by the drive mechanism.

[0116] The supporting component 214 is located at the interval between the two transmission belts 2111.

[0117] In this embodiment, the first conveying mechanism 211 or the transmission device 224 is designed with a hollow center. When the supporting component 214 carries and lifts the battery cover plate 1 and moves, it will not affect the normal transmission of the first conveying mechanism 211 of the previous processing machine or the transmission device 224 of the next processing machine, and will allow the corresponding processing machine to process the battery cover plate 1 continuously and without interruption. This ensures that all parts of the processing system can operate freely and smoothly, which is conducive to improving processing efficiency.

[0118] In the embodiment shown in Figure 2, the drive mechanism includes a drive belt 2113, which is sleeved on the drive shaft 2112 and the output shaft of a drive motor. The drive shaft 2112 and the output shaft are parallel.

[0119] When the output shaft of the drive motor rotates, it drives the drive shaft 2112 at the same end of the two transmission belts 2111 to rotate via the drive belt 2113, and simultaneously drives the two transmission belts 2111 to move the battery cover 1 along the conveying direction at the same speed. The driving method in this embodiment is simple, and the transmission is stable and efficient, which is conducive to flexible control of the start and stop of the transmission and adjustment of the transmission speed.

[0120] As shown in Figures 3 and 4, in the embodiment depicted, the supporting component 214 includes:

[0121] Horizontal slide 2141 extends horizontally;

[0122] Two sliders 2142 are provided, which are slidably fitted on the horizontal slide rail 2141 and connected to the drive mechanism respectively so as to move along the horizontal slide rail 2141 under the drive of the drive mechanism, thereby adjusting the distance between the two sliders 2142.

[0123] Support plates 2143 are respectively provided on the surface of the slider 2142. The upper surface of the support plate 2143 is provided with a negative pressure adsorption mechanism 2144 for adsorbing the battery cover.

[0124] Specifically, each slider 2142 is equipped with a support plate 2143, allowing two battery cover plates 1 to be transported at once using two support plates 2143, significantly improving production efficiency. The distance between the two support plates 2143 can be changed by driving the two sliders 2142 to slide along the horizontal slide rail 2141, thus allowing the spacing between adjacent battery cover plates 1 to be adjusted according to actual processing requirements. The aforementioned driving mechanism can specifically employ a high-pressure gas pipe 2145, through which high-pressure gas is supplied to drive the sliders 2142.

[0125] Furthermore, the surface of the horizontal slide 2141 is provided with a limiting groove 2141a whose length direction is consistent with that of the horizontal slide 2141. Limiting groove walls are provided at both ends of the limiting groove 2141a along its length. A limiting block 2142a is provided on the surface of the slider 2142 facing the horizontal slide 2141, and the limiting block 2142a is embedded in the limiting groove 2141a. The distance between the two support plates 2143 can be adjusted by moving the slider 2142 along the horizontal slide 2141. When the slider 2142 moves to either end of the limiting groove 2141a along its length, the limiting groove wall will restrict the movement of the slider 2142 by blocking the limiting block 2142a, thereby preventing the slider 2142 from moving excessively and disengaging from the horizontal slide 2141.

[0126] In the embodiment shown in Figure 2, the lifting mechanism 213 includes a lifting drive cylinder. The lifting drive cylinder has high operating efficiency and low energy consumption, which meets the usage requirements.

[0127] As shown in the embodiment of FIG2, a flipping mechanism 216 is also included, which is disposed on the first conveying mechanism 211, for flipping the battery cover plate input on one side, so that the battery cover plate is conveyed on the other side in a flipped state towards the direction of the conveying device 224.

[0128] Specifically, since the battery cover 1 is facing up when it is processed on the previous processing machine, the front side of the battery cover 1 needs to be facing up when it is processed on the next processing machine. Therefore, a flipping mechanism 216 is set on the first conveying mechanism 211 to flip the battery cover 1. After flipping, it is conveyed to the next processing machine for processing. Thus, there is no need to stop the machine specifically to flip the battery cover 1, which can ensure that the entire processing process is continuous and uninterrupted.

[0129] In the embodiment shown in Figure 2, the flipping mechanism 216 includes:

[0130] A rotating disc 2161 is rotatably disposed between two transmission belts 2111, and a slot 2162 for holding the battery cover is provided radially on the rotating disc 2161. The fixed rotating shaft of the rotating disc 2161 is perpendicular to the conveying direction of the first conveying mechanism 211.

[0131] A flip drive device 2163 is connected to the flip disk 2161 to drive the flip disk 2161 to rotate.

[0132] Specifically, when the conveyor belt 2111 conveys the battery cover 1 to one side of the flipping disc 2161 along the conveying direction, the slot 2162 of the flipping disc 2161 locks the battery cover 1; the flipping disc 2161 carries the battery cover 1 to the other side of the flipping disc 2161, at which point the battery cover 1 is flipped; the flipped battery cover 1 continues to be conveyed on the conveyor belt 2111 towards the direction of the conveying device 224.

[0133] The aforementioned flipping disk 2161 adopts a flipping form centered on a fixed rotating shaft. Since the fixed rotating shaft of the flipping disk 2161 is perpendicular to the conveying direction of the first conveying mechanism 211, on the one hand, after flipping, the battery cover 1 is accurately positioned on the first conveying mechanism 211 without any skewness, allowing the battery cover 1 to be correctly flipped and transported normally; on the other hand, the flipping disk 2161 is set on the first conveying mechanism 211, without occupying the arrangement space above the machine tool, and can also avoid the movement path of the processing robot on the machine tool surface, thus not affecting the arrangement and movement of the processing robot on the machine tool surface. In some embodiments, the flipping disk 2161 can rotate 180° at a time; however, rotating 180° at a time with too large an angle or too fast a speed will cause the battery cover 1 to be thrown out under the action of centrifugal force. Therefore, the battery cover 1 can be flipped by two actions of the flipping disc 2161. That is, the flipping disc 2161 is set to rotate at least twice at intervals, each time flipping 90°. Each flipping angle is small and the speed is slow. Two consecutive flips can ensure that the product is safely flipped to the other side of the flipping disc 2161, avoiding the battery cover 1 being thrown out and damaged under the action of centrifugal force due to excessive flipping.

[0134] Furthermore, there are multiple slots 2162, distributed circumferentially along the flip disk 2161. In this way, each rotation of the flip disk 2161 can engage multiple battery cover plates 1 and drive them to flip, which helps improve operational efficiency.

[0135] As shown in the embodiment of Figure 2, the flipping drive device 2163 includes a flipping drive belt sleeved on the fixed rotating shaft and the power output shaft of a rotary driver. The fixed rotating shaft and the power output shaft are parallel. When the power output shaft of the rotary driver rotates, the flipping drive belt drives the fixed rotating shaft of the flipping disk 2161 to rotate, causing the flipping disk 2161, which is holding the battery cover 1 from the input side, to rotate to the output side. At this time, the battery cover 1 is in a flipped state. The flipped battery cover 1 continues to be conveyed towards the transmission device 224.

[0136] The driving method of this embodiment is simple, and the transmission stability and efficiency are high, which is conducive to flexibly controlling the start and stop of the rotation of the flip disk 2161 and adjusting the rotation speed of the flip disk 2161.

[0137] As shown in Figures 5 and 6, in the embodiment depicted, the material preparation carrier 222 includes:

[0138] The vehicle body 2221 has multiple mold cavities 2222 arranged side by side along the length direction of the linear guide rail 2211 inside the vehicle body 2221, and the bottom of the mold cavity 2222 is provided with a bottom sealing plate that can move up and down.

[0139] A lifting cylinder 2223 is located below each of the mold cavities 2222, and the top of the lifting cylinder 2223 is connected to the bottom plate through a lifting block 2224. It is used to lift the bottom plate when the moving module 221 drives the mold cavity 2222 to the material picking station, so as to drive the explosion-proof sheet at the top of the mold cavity 2222 to rise to the height of the material picking station.

[0140] In this embodiment, multiple mold cavities 2222 are set up, and multiple explosion-proof sheets are placed in each mold cavity 2222 from top to bottom, saving material preparation time. The explosion-proof sheets stacked in the mold cavity 2222 can be picked up by the suction and discharge device 223 (such as the negative pressure suction head 2232 at the end of the robot arm 2231) and placed on the battery cover plate 1 in sequence. When the multiple layers of explosion-proof sheets stacked in a mold cavity 2222 are used up, the moving module 221 drives the carrier body 2221 to move along the length direction of the linear guide rail 2211 so that the next mold cavity 2222 reaches the material picking station to continue picking up materials.

[0141] The lifting cylinder 2223 ensures that the robotic arm 2231 is at the same height each time it picks up a piece of explosive material. It does not need to move down to pick up the next layer of explosive material after one layer has been picked up. The mechanism's operation is simple, less prone to errors, and more efficient.

[0142] As shown in Figure 6, in the embodiment described, the carrier body 2221 has a hollow structure 2221a at the part corresponding to the mold cavity 2222. Through the hollow structure 2221a, the number of explosion-proof sheets taken out and the number of remaining explosion-proof sheets in the mold cavity can be seen, which makes it convenient for the operator to understand the number of explosion-proof sheets in real time and replenish the explosion-proof sheets in the mold cavity 2222 in a timely manner.

[0143] As shown in Figures 6 and 7, in the embodiment described, the material preparation carrier 222 further includes a spare carrier 2225. The spare carrier 2225 has a spare mold cavity 2222 and is slidably mounted on a linear rail 2226. It is used to move to the material handling station when the carrier body 2221 is replenished with explosion-proof sheets, allowing the suction and discharge device 223 to pick up the explosion-proof sheets from the spare mold cavity 2222. The spare mold cavity 2222 provides time for the carrier body 2221 to replenish explosion-proof sheets normally, eliminating the need for machine downtime. This allows for continuous 24-hour feeding of explosion-proof sheets, ensuring a constant production rhythm and high efficiency, and preventing downtime from affecting the overall production rhythm and efficiency of the battery products.

[0144] In this embodiment, a lifting cylinder 2223 may also be provided below the spare mold cavity 2222, and the top head 2223a of the lifting cylinder 2223 is connected to the bottom sealing plate of the spare mold cavity 2222 through the lifting block 2224. This is used to lift the bottom sealing plate when the moving module 221 drives the mold cavity 2222 to the material picking station so that the topmost explosion-proof piece in the spare mold cavity 2222 rises to the height of the material picking station.

[0145] As shown in Figure 6, in the embodiment, the material preparation carrier 222 further includes a laser displacement sensor 2227, which is located above the material picking station. It is used to emit and receive laser light at a preset position in the mold cavity 2222 that has reached the material picking station, and to calculate the time T from emission to reception. The lifting cylinder 2223 is connected to the laser displacement sensor 2227 and is used to control the lifting cylinder 2223 to close when the feedback time from the laser displacement sensor 2227 is equal to a preset value.

[0146] In this embodiment, when the topmost explosion-proof sheet has not risen to the height of the picking station, the time T from laser emission to laser reception is relatively long. As the explosion-proof sheet rises, the time T becomes shorter and shorter. Therefore, a preset value can be designed to be the time value when the explosion-proof sheet just rises to the height of the picking station. At this time, controlling the closing of the lifting cylinder 2223 can ensure that the topmost explosion-proof sheet just reaches the height of the picking station, avoiding the topmost explosion-proof sheet being driven to continue rising, which would cause the robot arm 2231 to be unable to accurately pick up the explosion-proof sheet or to be too close to the topmost explosion-proof sheet and crush it.

[0147] As a crucial component of the lithium battery, the battery cover 1 requires extremely high processing precision. Therefore, the precision required for handling the explosion-proof sheet is also very high, with a single-sided error not exceeding 0.02mm. Consequently, high material handling accuracy is necessary. Therefore, in the embodiment shown in Figure 6, the explosion-proof sheet feeding module 220 further includes:

[0148] The lower vision mechanism 225 is located between the material picking station and the material discharging station, and is used to capture a first image of the lower surface of the explosion-proof sheet when the explosion-proof sheet is picked up and moved to the material discharging station above the lower vision mechanism 225.

[0149] The upper vision mechanism 226 is located above the feeding station and is used to capture a second image of the upper surface of the battery cover 1 when the battery cover 1 moves to the feeding station.

[0150] The suction and discharge device 223 is communicatively connected to the lower vision mechanism 225 and the upper vision mechanism 226, and is configured to adjust the movement path based on the comparison difference between the first image, the second image and the pre-stored standard image data to place the explosion-proof sheet on the battery cover plate 1 at the discharge station.

[0151] Specifically, standard image data can be pre-stored in the suction and discharge device 223. If the captured image is consistent with the pre-stored standard image data, the movement path of the suction and discharge device 223 remains unchanged.

[0152] When there is a difference between the captured first image, the second image and the pre-stored standard image data, the movement path can be adjusted based on the difference to ensure that each explosion-proof piece can be accurately placed in the preset position on the battery cover 1 during the processing, thereby improving the placement accuracy on the battery cover 1.

[0153] As shown in Figure 5, in the embodiment described, the upper vision mechanism 226 includes a camera 2261 and a vision bracket 2262 for fixing the camera 2261. The vision bracket 2262 spans across both sides of the transmission device 224 perpendicular to the transmission direction. The vision bracket 2262 ensures stable installation of the camera 2261, preventing camera 2261 from shaking, thereby guaranteeing the accuracy of the captured images and the placement precision of the explosion-proof sheet.

[0154] Currently, the production capacity demand for battery cover plate 1 has further increased, reaching 1500 pieces / hour. As shown in Figures 5 and 7, in the embodiment depicted, to improve equipment capacity, at least two of the mobile module 221, the material preparation carrier 222, and the material suction and discharge device 223 are respectively arranged side-by-side on one side of the transmission device 224. Two modules and two sets of robots work simultaneously. The cooperation of multiple robots with multiple mobile modules 221 and material preparation carriers 222 increases the assembly efficiency of picking up and placing explosion-proof sheets, which is beneficial to improving overall production capacity.

[0155] As shown in Figure 5, in the embodiment, the mobile module 221 includes:

[0156] The linear guide 2211 has its two ends along its length located at the material preparation station and the material picking station, respectively.

[0157] A sliding bracket is slidably mounted on the linear guide rail 2211 and connected to the material preparation carrier 222;

[0158] The power cylinder 2212 is used to drive the sliding bracket to move the material preparation carrier 222 along the length direction of the linear guide rail 2211.

[0159] When the power cylinder 2212 is started, it can drive the sliding bracket to move the material preparation carrier 222 along the length direction of the linear guide rail 2211, thereby moving the material preparation carrier 222 to the material picking station. The power cylinder 2212 has high driving stability and can accurately control the moving distance of the sliding bracket to avoid movement deviation.

[0160] In one example of the present invention, both the pre-marking positioning fixture 232 and the composite welding positioning fixture 233 include:

[0161] The base 234 has a positioning plate 2341, the positioning plate 2341 includes a first end face 23411 and a second end face 23412 disposed opposite to each other. At least one limiting cavity 23413 adapted to the battery cover plate 1 is formed on the first end face 23411, and at least one pre-dotting area 23414 or at least one full welding area 23415 extending through the first end face 23411 is provided on the second end face 23412.

[0162] At least one lifting device 235 is configured to switch between lifting the battery cover 1 to a first lifting position or a second lifting position that engages with the limiting cavity 23413 and retracting the battery cover 1 to a first initial position or a second initial position that disengages from the limiting cavity 23413.

[0163] During laser welding of the battery cover 1, the battery cover 1 is conveyed by the conveying device 224 to the position of the pre-marking positioning fixture 232. The conveying device 224 stops conveying, that is, it is conveyed to the upper end of its lifting device 235. The lifting device 235 lifts the battery cover 1 to the first lifting position, and the battery cover 1 engages with the limiting cavity 23413. Then, the laser pre-marking mechanism 23B performs spot welding on the explosion-proof sheet on the battery cover 1 in the pre-marking area 23414. After the spot welding is completed, the lifting device 235 retracts the battery cover 1 to the position where it is disengaged from the limiting cavity 23413 until the first initial position of the conveyor belt, and the battery cover continues to be conveyed. When the battery cover 1 reaches the position of the composite welding positioning fixture 233, the conveying device 224 stops conveying, and the battery cover 1 is lifted to the second lifting position by the lifting device 235. The battery cover 1 engages with the limiting cavity 23413. Then, the laser welding mechanism 23C performs full welding on the explosion-proof sheet on the battery cover 1 in the full welding area 23415. After the full welding is completed, the lifting device 235 retracts the battery cover 1 to a position where it is disengaged from the limiting cavity 23413 until the second initial position of the conveyor belt. The battery cover 1 is then conveyed to the next process, and the explosion-proof sheet welding device 230 repeats the above steps to weld the next battery cover 1. Both the pre-marking positioning fixture 232 and the composite welding positioning fixture 233 can limit the position of the battery cover 1, thereby enabling accurate spot welding or full welding, greatly improving the yield rate. Moreover, the marking efficiency is high, the structure is simple, and the reliability is high.

[0164] Preferably, both the pre-marking positioning fixture 232 and the composite welding positioning fixture 233 have multiple limiting cavities 23413 and multiple lifting devices 235, thereby greatly improving the marking efficiency of the pre-marking positioning fixture 232 and the composite welding positioning fixture 233.

[0165] In one example of the present invention, a plurality of limiting posts 236 are provided on the first end face 23411, and the plurality of limiting posts 236 are arranged at intervals along the circumferential direction to jointly define the limiting cavity 23413.

[0166] In other words, multiple limiting posts 236 together define the outline of the battery cover 1, thereby limiting the battery cover 1 during the lifting process of the lifting device, preventing the battery cover 1 from moving during the welding process of the laser pre-marking mechanism 23B or the laser welding mechanism 23C, which would affect the accurate marking of the battery cover 1.

[0167] In one example of the present invention, the limiting post 236 includes: a connecting section 2361 and an extension section 2362 connected thereto, wherein the connecting section 2361 is fixedly connected to the positioning plate 2341, and the extension section 2362 protrudes from the first end face 23411;

[0168] For example, the connecting section 2361 and the extension section 2362 form a right angle. In order to facilitate the connection of the limiting post 236, a connecting hole is opened on the positioning plate 2341. The connecting section 2361 is fixed on the positioning plate 2341 by fasteners, while the extension section 2362 passes through the connecting hole and protrudes from the first end face 23411, thereby forming a limiting cavity 23413 on the first end face 23411. This connection method can facilitate the connection of the limiting post 236.

[0169] In one example of the present invention, the limiting post 236 further includes: a bearing 2363.

[0170] The bearing 2363 is pivotally connected to the extension 2362 and is configured such that when the battery cover is lifted to a first lifting position, the circumferential edge of the battery cover abuts against the profile surface of the bearing 2363.

[0171] Specifically, a connecting shaft 2364 is also provided on the extension section 2362, and a bearing 2363 is connected to the connecting shaft 2364. That is, the inner ring of the bearing 2363 is fixedly connected to the connecting shaft 2364 by an interference fit, and the outer ring of the bearing 2363 abuts against the circumferential edge of the battery cover 1. This can greatly reduce the friction between the battery cover 1 and the limiting post 236, that is, convert sliding friction into rolling friction, which can protect the battery cover 1.

[0172] In one example of the invention, a buffer device 237 is also included.

[0173] It is installed on the positioning plate 2341. When the battery cover is lifted to the first lifting position or the second lifting position, the buffer device 237 is configured to abut against the end face of the battery cover to buffer the impact force between the battery cover and the first end face 23411.

[0174] In other words, when the battery cover 1 is lifted to the first lifting position or the second lifting position, it comes into contact with the first end face 23411 in the limiting cavity 23413. An impact force will be generated between the battery cover 1 and the first end face 23411. This impact force will damage the battery cover 1. The buffer device 237 is provided on the positioning plate 2341, which can effectively buffer the impact force between the battery cover 1 and the first end face 23411, thereby protecting the battery cover 1.

[0175] Preferably, the buffer device 237 includes multiple buffer devices. For example, multiple buffer devices 237 can be arranged in an array on the first end face 23411 of the positioning plate 2341. By setting multiple buffer devices 237, the buffering force of the battery cover 1 can be made more uniform.

[0176] In one example of the present invention, the buffer device 237 includes:

[0177] Positioning hole 23416 is formed on the positioning plate 2341;

[0178] Elastic element 2371 is installed in the positioning hole 23416; and

[0179] The buffer post 2372 is adapted to fit into the positioning hole 23416 and connected to the elastic member 2371, and is configured to be able to extend and retract along the positioning hole 23416 under the action of the elastic member 2371.

[0180] During the lifting process of the battery cover 1, the end face of the battery cover 1 will first come into contact with the buffer column 2372, lifting the buffer column 2372 to make it move upward. The buffer column 2372 moves upward along the extension direction of the positioning hole 23416. During this process, the buffer column 2372 squeezes the elastic member 2371 to make a contraction movement, so that the elastic member 2371 generates a restoring force that makes the buffer column return to its initial position, that is, its direction is opposite to the movement direction of the battery cover 1. The above-mentioned buffer device 237 can effectively buffer the impact force between the battery cover 1 and the first end face 23411.

[0181] In one example of the present invention, the elastic element 237141 is one of a spring, a sheet, and a rubber element;

[0182] All three of the above can achieve the elastic reciprocating motion of the buffer column 2372.

[0183] In one example of the invention, it further includes: a receiving plate 238.

[0184] It is fixed in the limiting cavity 23413. When the battery cover is lifted to the lifting position, the receiving plate 238 is configured to support the battery cover.

[0185] Specifically, receiving holes are provided on the receiving plate 238, and the receiving holes correspond one-to-one with the positioning holes 23416. The inner diameter of the receiving holes is smaller than the inner diameter of the positioning holes 23416. For example, the buffer post 2372 is a bolt. When the buffer post 2372 is in a free state, the head of the bolt is adapted to the positioning hole 23416, and the stud part of the bolt is adapted to the receiving hole. In this way, when the receiving plate 238 is fixed to the positioning plate 2341, the receiving plate 238 plays a limiting role for the buffer post 2372.

[0186] It should be noted that, since the positioning hole 23416 is a through hole, the fastening cap 2373 is fixed on the second end face 23412 of the positioning hole 23416, which plays a limiting role for the buffer post 2372 and the elastic element 2371.

[0187] In one example of the present invention, a lifting plate 239 is also included.

[0188] It is fixed on the lifting device 235 and configured to lift synchronously with the battery cover 1;

[0189] By setting the lifting plate 239, the contact area between the lifting device 235 and the battery cover 1 can be increased, thereby making the force on the battery cover 1 more even. Preferably, the lifting plate 239 corresponds to the receiving plate 238.

[0190] In one example of the present invention, the lifting device 235 is one of an electric push rod, a hydraulic cylinder, and a pneumatic cylinder.

[0191] The lifting device 235 includes a cylinder 2351 and a piston rod 2352 that can extend and retract within the cylinder 2351. The cylinder 2351 is fixedly connected to the base 234, for example, by a support seat. The telescopic rod is fixedly connected to the lifting plate 239. All of the above can achieve the lifting effect of the battery cover 1.

[0192] In one example of the present invention, the base 234 further includes:

[0193] The substrate 2342 is disposed opposite to the positioning plate 2341;

[0194] Multiple columns 2343 are connected between the base plate 2342 and the positioning plate 2341 and are configured to support the positioning plate 2341, wherein the lifting device 235 is fixed on the base plate 2342;

[0195] The positioning plate 2341 is supported on the upper end of the conveyor belt by the column 2343, while the lifting device 235 is located at the lower end of the conveyor belt. The conveyor belt has a hollow structure in the middle (which will not affect the support and conveying of the battery cover 1). The lifting device 235 lifts the battery cover 1 through the hollow structure in the middle. The positioning plate 2341 is supported by the base plate 2342 and the column 2343, so that the base 234 has an integrated structure, which improves the overall reliability of the pre-marking positioning fixture 232 and the composite welding positioning fixture 233. Preferably, the lifting device 235 is fixed on the base plate 2342 by fasteners.

[0196] In one example of the present invention, a displacement sensor 23A is also included.

[0197] It is mounted on the positioning plate 2341 and configured to determine the accuracy and flatness of the position of the battery cover in the limiting cavity 23413 based on the distance between it and the battery cover.

[0198] In other words, by setting a displacement sensor 23A on the positioning plate 2341 at the position of the limiting cavity 23413, the distance between the displacement sensor 23A and the battery cover 1 is measured, thereby determining whether the position of the battery cover 1 is accurate and whether the surface of the battery cover 1 is flat. When it is determined that the position and flatness of the battery cover 1 are correct, the laser pre-dotting mechanism 23B or the laser welding mechanism 23C then welds the battery cover 1 at the pre-dotting area 23414 or the full welding area 23415.

[0199] Preferably, each limiting cavity 23413 is provided with two displacement sensors 23A. The position of the battery cover BP is determined by comparing the distances measured by the two displacement sensors 80. The position of the battery cover BP is determined to be accurate and flat.

[0200] In one example of the invention, a workbench is also included.

[0201] Both the laser pre-marking mechanism 23B and the laser welding mechanism 23C are movably mounted on the worktable, arranged in a direction parallel to the conveyor belt.

[0202] The worktable includes a drive unit that drives the laser pre-dotting mechanism 23B and the laser welding mechanism 23C to move in a direction parallel to the output belt, thereby improving the flexibility of the laser pre-dotting mechanism 23B and the laser welding mechanism 23C.

[0203] For example, the driving components, such as ball screws, hydraulic cylinders, and pneumatic cylinders, can all achieve the above functions.

[0204] In one example of the invention, it further includes an NG throwing mechanism 240, which includes a moving component 241 and a throwing frame 242. The moving component 241 is arranged at the upper end of the conveying device 224, and the throwing frame 242 is disposed at the end of the conveying device 224. The moving component 241 has an adsorption plate configured to move along the extension direction and height direction of the conveying device 224 to adsorb battery cover plates BP with weld defects and move them into the throwing frame 242. Battery cover plates BP with undefective welds are transported to the next work station.

[0205] It should be noted that the battery cover welding equipment also includes a weld inspection mechanism 250, which is configured to inspect the weld information of the explosion-proof sheet on each battery cover to determine whether there are a series of defects such as warping, incomplete welding, broken welding, and explosion points. If so, it is moved to the throwing frame 242 via the NG throwing mechanism 240; otherwise, it is transferred to the next work station.

[0206] The exemplary embodiments of the battery cover welding equipment proposed in this invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this invention, and various combinations can be made to the various technical features and structures proposed in this invention without exceeding the protection scope of this invention, which is determined by the appended claims.

Claims

1. A battery cover welding device, characterized in that, include: A material handling and feeding mechanism includes: a first conveying mechanism for conveying a battery cover plate towards a transmission device; a handling mechanism including a slide rail and a transition plate slidably disposed on the slide rail, with both ends of the slide rail respectively located below the ends of the first conveying mechanism and the transmission device that are close to each other; a lifting mechanism disposed on the surface of the transition plate for rising when the transition plate moves below the first conveying mechanism to lift the battery cover plate by a supporting member and disengage the battery cover plate from the first conveying mechanism, and for lowering when the transition plate moves to the first conveying mechanism to place the battery cover plate on the transmission device; and a supporting member disposed on the lifting mechanism. The system includes: a support for the battery cover; a conveying device for conveying the battery cover placed on its surface in a direction away from the first conveying mechanism; and an explosion-proof sheet feeding module, comprising: a moving module; a material preparation carrier for loading explosion-proof sheets, the material preparation carrier being disposed of in the moving module and movable between a material preparation station and a material picking station under the driving action of the moving module; and a suction and discharge device disposed at the material picking station for suctioning the explosion-proof sheets and placing the explosion-proof sheets at a preset position on the surface of the battery cover upon reaching the discharge station; wherein the conveying device is used to continuously convey the battery cover to the discharge station and to convey the discharged battery cover to the explosion-proof sheet welding device; the conveying device... The device includes a drive unit and a conveyor belt connected thereto, with battery cover plates pre-positioned with explosion-proof sheets arranged on the conveyor belt; an explosion-proof sheet welding device includes: a pre-marking positioning fixture, suspended across the conveyor belt, configured to switch between lifting at least one battery cover plate on the conveyor belt to a first lifting position and retracting it to a first initial position on the conveyor belt; wherein, the upper end of the pre-marking positioning fixture is provided with a laser pre-marking mechanism for spot welding when the battery cover plate is in the lifting position; a composite welding positioning fixture, suspended across the conveyor belt and located downstream of the pre-marking positioning fixture, configured to be able to... At least one battery cover plate alternately moves between being lifted to a second lifting position and retracted to a second initial position on the conveyor belt; wherein, the upper end of the composite welding positioning fixture is provided with a laser welding mechanism for performing full welding when the battery cover plate is in the lifting position; the supporting component includes: a horizontal slide rail extending horizontally; two sliders respectively slidably fitted on the horizontal slide rail and respectively connected to a drive mechanism to move along the horizontal slide rail under the drive of the drive mechanism to adjust the distance between the two sliders; and support plates respectively provided on the surface of the sliders, the upper surface of the support plates being provided with a negative pressure adsorption mechanism for adsorbing the battery cover plate.

2. The battery cover welding equipment according to claim 1, characterized in that, The first conveying mechanism or transmission device includes two conveyor belts arranged side by side at intervals in the width direction, each conveyor belt being sleeved on two drive shafts, and the drive shafts at the same end of the two conveyor belts being collinear and driven to rotate by the drive mechanism; the supporting component is provided at the interval between the two conveyor belts.

3. The battery cover welding equipment according to claim 1, characterized in that, The material handling and feeding mechanism also includes a flipping mechanism, which is located on the first conveying mechanism, for flipping the battery cover plate input on one side, so that the battery cover plate is conveyed on the other side in a flipped state towards the direction of the conveying device.

4. The battery cover welding equipment according to claim 1, characterized in that, The material preparation carrier includes: a carrier body, in which multiple mold cavities are arranged side by side along the length of a linear guide rail, and the bottom of each mold cavity is provided with a bottom plate that can move up and down; and a lifting cylinder, located below each mold cavity, with the top of the lifting cylinder connected to the bottom plate via a lifting block, for lifting the bottom plate when the moving module drives the mold cavity to the material picking station, thereby driving the topmost explosion-proof piece in the mold cavity to rise to the height of the material picking station.

5. The battery cover welding equipment according to claim 1, characterized in that, The explosion-proof sheet feeding module further includes: a lower vision mechanism, located between the picking station and the discharging station, for capturing a first image of the lower surface of the explosion-proof sheet when it is picked up and moved to the discharging station above the lower vision mechanism; and an upper vision mechanism, located above the discharging station, for capturing a second image of the upper surface of the battery cover when it moves to the discharging station; the picking and discharging device is communicatively connected to the lower vision mechanism and the upper vision mechanism, and is configured to adjust the movement path based on the comparison difference between the first image, the second image and pre-stored standard image data to place the explosion-proof sheet on the battery cover at the discharging station.

6. The battery cover welding equipment according to claim 1, characterized in that, The moving module includes: a linear guide rail with its two ends located at the material preparation station and the material picking station respectively along its length; a sliding bracket slidably disposed on the linear guide rail and connected to the material preparation carrier; and a power cylinder for driving the sliding bracket to move the material preparation carrier along the length of the linear guide rail.

7. The battery cover welding equipment according to claim 1, characterized in that, Both the pre-marking positioning fixture and the composite welding positioning fixture include: a base having a positioning plate, the positioning plate having a first end face and a second end face disposed opposite to each other, at least one limiting cavity adapted to the battery cover being formed on the first end face, and at least one pre-marking area or at least one full welding area extending through the first end face being formed on the second end face; at least one lifting device configured to switch between lifting the battery cover to a first lifting position or a second lifting position engaging with the limiting cavity and retracting the battery cover to a first initial position or a second initial position disengaging from the limiting cavity.

8. The battery cover welding equipment according to claim 7, characterized in that, Also includes: A buffer device, mounted on the positioning plate, is configured to abut against the end face of the battery cover when the battery cover is lifted to the lifting position to buffer the impact force between the battery cover and the first end face.

9. The battery cover welding equipment according to claim 7, characterized in that, Also includes: A displacement sensor, mounted on the positioning plate, is configured to determine the accuracy and flatness of the battery cover's position within the limiting cavity based on measuring the distance between it and the battery cover.

Images