Battery module cover welding device

Abstract

The present invention relates to a battery module cover welding device, which belongs to the field of lithium battery module production and is used to weld the cover to the battery module. The battery module cover welding device includes a loading part, a conveying part and a welding part; the loading part is located at the front station of the welding part, and is used to carry the workpiece to be welded, and the workpiece to be welded includes a battery module and a cover covering at least one side of the battery module; the conveying part is configured to move between the loading part and the welding part, and is used to convey the workpiece to be welded from the loading part to the welding part, and to remove the welded workpiece from the welding part; the welding part is used to weld the workpiece to be welded into one piece. The present invention conveys the workpiece to be welded from the loading part to the welding part for welding by the conveying part, which greatly improves the production efficiency.

Description

Technical Field

[0001] The invention relates to the field of lithium battery module production, in particular to a battery module cover welding device. Background Art

[0002] In the production process of lithium battery modules, multiple battery cells are arranged in parallel to form a battery module. Fig.16 , Fig.17 As shown, the cover plate 102, the end cover plate 103 and the envelope structure 104 are assembled in sequence at both ends of the battery module 101. The cover plate 102 is used to converge the electric energy of each battery cell, and the end cover plate 103 is used for insulation and to separate the cover plate 102 from the outside. The cover plate 102 is snap-fitted to the battery module 101, and the end cover plate 103 is also snap-fitted to the cover plate 102. The envelope structure 104 is made of metal material and is installed on the outside of the end cover plate 103. The package cover 105 covers the outside of the battery module 101 and is used to reinforce the battery module 101. The package cover 105 and the envelope structure 104 are welded together to form the battery module assembly 100.

[0003] In the prior art, the welding between the cover and the envelope structure is generally produced by manual welding, which not only has low production efficiency but also affects the quality of the lithium battery module.

[0004] Therefore, it is necessary to design an automatic welding equipment that can improve efficiency. Summary of the invention

[0005] The present invention aims to solve the problem of low efficiency of manual welding of existing lithium battery modules and provides a high-efficiency battery module cover welding device.

[0006] The technical solution of the present invention is as follows:

[0007] A battery module cover welding device is used to weld the cover to the battery module, and the battery module cover welding device includes a loading part, a conveying part and a welding part; wherein: the loading part is located at the front station of the welding part, and is used to carry the workpiece to be welded, and the workpiece to be welded includes a battery module and a cover covering at least one side of the battery module; the conveying part is configured to move between the loading part and the welding part, and is used to convey the workpiece to be welded from the loading part to the welding part, and to remove the welded workpiece from the welding part; the welding part is used to weld the workpieces to be welded into one piece.

[0008] The workpiece to be welded is transported from the loading part to the welding part for welding through the transport part, which greatly improves the production efficiency.

[0009] Furthermore, the loading part includes a lifting mechanism, a lifting platform and a clamping mechanism; the lifting platform is installed on the lifting mechanism, and the lifting mechanism drives the lifting platform to perform lifting movements; the clamping mechanism positions the workpiece to be welded on the lifting platform; a carrier for fixing the workpiece to be welded is provided on the lifting platform.

[0010] The loading part uses the cooperation of the lifting mechanism, lifting platform and clamping mechanism to make the workpiece to be welded in an accurate position, which is convenient for the handling part to carry.

[0011] Furthermore, the clamping mechanism is installed on opposite sides of the lifting platform facing each other, and at least two parallel electric rollers are installed on the lifting platform. The electric roller is located between the two clamping mechanisms. The electric roller rolls to drive the workpiece to be welded placed on the electric roller to move along the rolling direction of the electric roller.

[0012] The lifting platform adjusts the position of the battery module through an electric roller and has a simple structure.

[0013] Furthermore, each clamping mechanism comprises a clamping cylinder and a clamping wheel, and the clamping cylinders of the two clamping mechanisms respectively drive the clamping wheels to extend or retract, thereby clamping or loosening the workpiece to be welded between the two clamping mechanisms.

[0014] The clamping mechanism adopts a clamping cylinder and a clamping wheel, which has a simple structure and is easy to operate.

[0015] Furthermore, the carrier includes a carrier bracket, a positioning seat, a clamping plate and a guide wheel, the guide wheel is installed on the four corners of the carrier bracket, the positioning seat is installed in the middle of the upper surface of the carrier bracket, the clamping plate is installed on the positioning seat, and the clamping plate cooperates with the positioning seat to clamp the workpiece to be welded; the carrier also includes a loading plate, the two loading plates are respectively located on both sides of the positioning seat, and each loading plate is respectively installed on the buffer lifting mechanism.

[0016] The workpiece to be welded is fixed by a carrier, which can simplify the loading action; the carrier is provided with a loading plate installed on a buffer lifting mechanism, which can play a buffering role.

[0017] Furthermore, the conveying part includes a first conveying mechanism and a second conveying mechanism, and the first conveying mechanism and the second conveying mechanism can be horizontally movably installed on the conveying bracket. The first conveying mechanism is used to convey the workpiece to be welded from the loading part to the welding part, and the second conveying mechanism is used to convey the welded workpiece out of the welding part. The structure of the second conveying mechanism is the same as or different from that of the first conveying mechanism.

[0018] The transport section is equipped with two transport mechanisms, which can perform loading and unloading actions at the same time, thereby improving production efficiency.

[0019] Furthermore, the first transporting mechanism includes a transporting and lifting mechanism, a tidying mechanism and a clamping mechanism. The clamping mechanism is installed on the tidying mechanism, and the tidying mechanism is installed on the transporting and lifting mechanism; the clamping mechanism includes a clamping claw cylinder and a lifting clamp installed on the clamping claw cylinder, and the tidying mechanism includes a tidying cylinder and a tidying plate installed on the tidying cylinder; the clamping claw cylinder drives the lifting clamp to open and close, the tidying cylinder drives the tidying plate to open and close, and the transporting and lifting mechanism drives the lifting clamp to rise and fall.

[0020] The first transport mechanism is used for loading and aligning the workpieces to be welded so that the positions are accurate.

[0021] Furthermore, the first transport mechanism also includes a positioning mechanism installed on the regularization mechanism, the positioning mechanism includes a latch cylinder and a latch installed on the latch cylinder, and the latch cylinder drives the latch to rise and fall.

[0022] The first transport mechanism is provided with a positioning mechanism, which can further position the workpiece to be welded.

[0023] Furthermore, the welding part includes a welding mechanism and a workpiece carrying device, the welding mechanism includes a welding machine and a welding machine position adjustment mechanism for adjusting the position of the welding machine, the workpiece carrying device includes a fixing device and a rotating device, the fixing device is used to fix the workpiece to be welded, and the rotating device is used to drive the fixing device to rotate.

[0024] The workpiece carrying device can adjust the welding position of the workpiece, making it easier for the welding mechanism to complete the welding action.

[0025] Furthermore, the welding machine position adjustment mechanism includes a front and rear drive mechanism, a left and right drive mechanism and an up and down drive mechanism, the welding machine is installed on the up and down drive mechanism, the up and down drive mechanism is installed on the left and right drive mechanism, and the left and right drive mechanism is installed on the front and rear drive mechanism.

[0026] The welding machine position adjustment mechanism includes a front and rear drive mechanism, a left and right drive mechanism and an up and down drive mechanism, which can adjust the position of the welding machine in space to facilitate welding.

[0027] Furthermore, the fixing device includes a welding platform, front and rear clamping mechanisms and left and right clamping mechanisms, and the front and rear clamping mechanisms and left and right clamping mechanisms are respectively installed on opposite sides of the welding platform.

[0028] The fixing device comprises a front and rear clamping mechanism and a left and right clamping mechanism, which can fix the workpiece from two opposite sides of the workpiece to improve the reliability of the fixing.

[0029] Furthermore, the rotating device includes a rotating shaft and a rotating shaft driving mechanism, the welding platform is fixedly connected to the rotating shaft, and the rotating shaft driving mechanism drives the rotating shaft to rotate and further drives the welding platform to rotate.

[0030] The workpiece to be welded is rotated by a rotating device, so that other parts can be welded, thereby improving production efficiency.

[0031] Furthermore, the welding part also includes a welding machine angle adjustment mechanism, the welding machine is installed on the welding machine angle adjustment mechanism, and the welding machine angle adjustment mechanism is installed on the upper and lower driving mechanisms.

[0032] The welding machine is installed on the welding machine angle adjustment mechanism, which is convenient for adjusting the welding position of the welding machine.

[0033] Furthermore, the battery module cover welding device also includes a material unloading portion, which is used to move the welded workpiece away from the welding portion.

[0034] By setting up the unloading section, the welded workpiece can be sent to the next workstation, further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of the feeding part in the present invention.

[0037] Figure 3 It is a front view of the lifting mechanism in the feeding part of the present invention.

[0038] Figure 4 It is a three-dimensional structural schematic diagram of the clamping mechanism in the feeding part of the present invention.

[0039] Figure 5 It is a schematic diagram of the three-dimensional structure of the carrier in the loading part of the present invention.

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of the first transport mechanism in the transport part of the present invention.

[0041] Figure 7 It is a side view of the first transport mechanism in the transport section of the present invention.

[0042] Figure 8 This is a front view of the first transport mechanism of the present invention without the transport lifting mechanism.

[0043] Fig. 9 It is a schematic diagram of the three-dimensional structure of the positioning mechanism in the first transport mechanism of the present invention.

[0044] Fig.10 It is a schematic diagram of the three-dimensional structure of the welding part in the present invention.

[0045] Fig.11 It is a three-dimensional structural schematic diagram of the welding mechanism in the welding part of the present invention.

[0046] Fig.12 It is a schematic diagram of the three-dimensional structure of the fixing device in the welding part of the present invention.

[0047] Fig.13 It is a schematic diagram of the three-dimensional structure of the fixing device in the welding part of the present invention from another perspective.

[0048] Fig.14 It is a front view of the fixing device in the welding part of the present invention.

[0049] Fig.15 It is a schematic diagram of the three-dimensional structure of the rotating device in the welding part of the present invention.

[0050] Fig.16 An exploded view of the battery module assembly in the present invention.

[0051] Fig.17 It is a schematic diagram of the three-dimensional structure of the battery module assembly in the present invention.

[0052] Figure 1 to Figure 17 The invention comprises a feeding part 10, a lifting mechanism 11, a lifting platform 111, an electric roller 112, a motor 113, a guide rail 114, a screw 115, a clamping mechanism 12, a clamping cylinder 121, a clamping wheel 122, a carrier 13, a carrier bracket 131, a positioning seat 132, a clamping plate 1321, a guide wheel 1322, a feeding plate 1323, a buffer lifting mechanism 133, a conveying part 20, a first conveying mechanism 21, and a conveying lifting mechanism 211. , tidying mechanism 212, tidying cylinder 2121, tidying plate 2122, clamping mechanism 213, clamping claw cylinder 2131, lifting claw 2132, positioning mechanism 214, latch cylinder 2141, latch 2142, slide rail 2143, photoelectric sensor 215, second transport mechanism 22, transport bracket 23, welding part 30, welding mechanism 31, welding machine 311, welding machine angle adjustment mechanism 3111, exhaust tube 3112, exhaust Wind tube angle adjustment mechanism 3113, welding machine position adjustment mechanism 312, front and rear drive mechanism 3121, left and right drive mechanism 3122, up and down drive mechanism 3123, displacement sensor 313, workpiece bearing device 32, fixing device 321, welding platform 3210, front and rear clamping mechanism 3211, front and rear pressure blocks 3212, front and rear clamping cylinder 3213, left and right clamping mechanism 3214, drive cylinder 3215, left and right pressure blocks 3 216, left and right clamping cylinders 3217, top block 3218, top block cylinder 3219, rotating device 322, rotating shaft 3221, rotating shaft driving mechanism 3222, synchronous belt 3223, rotating motor 3224, photoelectric detector 323, unloading part 40, battery module assembly 100, battery module 101, cover plate 102, end cover plate 103, envelope structure 104, enveloping cover 105, first position 106, second position 107. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] like Figure 1 As shown, the present invention is a battery module cover welding device, which is used to weld the cover to the battery module.

[0055] The battery module cover welding device at least includes a loading part 10 , a conveying part 20 and a welding part 30 ; optionally, it may also include a unloading part 40 .

[0056] The loading section 10 is located at the front station of the welding section 30 and is used to carry the workpiece to be welded. Fig.16 , Fig.17 As shown, the workpiece to be welded, namely the battery module assembly 100 , includes the battery module 100 and a cover 105 covering at least one side of the battery module 100 .

[0057] The transporting portion 20 is configured to move between the loading portion 10 and the welding portion 30, and is used to transport the workpieces to be welded from the loading portion 10 to the welding portion 30, and to move the welded workpieces away from the welding portion 30; the welding portion 30 is used to weld the workpieces to be welded into one body.

[0058] The present invention transports the workpiece to be welded from the loading part 10 to the welding part 30 for welding through the transport part 20, thereby greatly improving the production efficiency.

[0059] like Figure 2 As shown, the loading part 10 includes a lifting mechanism 11, a lifting platform 111 and a clamping mechanism 12; the lifting platform 111 is installed on the lifting mechanism 11, and the lifting mechanism 11 drives the lifting platform 111 to do lifting and lowering movements; the clamping mechanism 12 positions the workpiece to be welded on the lifting platform 111; and a carrier 13 for fixing the workpiece to be welded is provided on the lifting platform 111. When the battery module is taken away at a high position, the lifting mechanism 11 drives the lifting platform 111 to descend to a low position, and the lifting platform 111 outputs the carrier 13.

[0060] The loading part 10 of the present invention makes the position of the workpiece to be welded accurate through the cooperation of the lifting mechanism 11 , the lifting platform 111 and the clamping mechanism 12 , so as to facilitate the transportation of the transportation part 20 .

[0061] like Figure 3 As shown, the lifting mechanism 11 includes a motor 113, a guide rail 114 and a lead screw 115, and the lifting platform 111 is fixed on the lead screw 115. The motor 113 drives the lead screw 115 to rotate, thereby driving the lifting platform 111 to perform lifting motion along the guide rail 114.

[0062] like Figure 4 As shown, the clamping mechanism 12 is mounted on opposite sides of the lifting platform 111. At least two parallel electric rollers 112 are mounted on the lifting platform 111, and the electric roller 112 is located between the two clamping mechanisms 12. The electric roller 112 rolls to drive the workpiece to be welded placed on the electric roller 112 to move along the rolling direction of the electric roller 112.

[0063] The lifting platform 111 of the present invention adjusts the position of the battery module through the electric roller 112 and has a simple structure.

[0064] Each clamping mechanism 12 includes a clamping cylinder 121 and a clamping wheel 122. There can be multiple clamping wheels 122, and there are two in this embodiment. The clamping wheel 122 is installed on the movable part of the clamping cylinder 121, and the clamping cylinder 121 is installed on the lifting platform 111 through a bracket. The clamping cylinders 121 of the two clamping mechanisms 12 respectively drive the clamping wheel 122 to extend or retract horizontally, thereby clamping or loosening the workpiece to be welded between the two clamping mechanisms 12. The clamping wheel 122 clamps the battery module to further fix the battery module and the carrier 13.

[0065] The clamping mechanism 12 of the present invention adopts a clamping cylinder 121 and a clamping wheel 122, and has a simple structure and is easy to operate.

[0066] The lifting platform 111 is also provided with a positioning mechanism, which drives a pin to be inserted into the carrier 13 through a cylinder to ensure that the carrier 13 does not move.

[0067] like Figure 5 As shown, the carrier 13 includes a carrier bracket 131, a positioning seat 132, a clamping plate 1321 and a guide wheel 1322. The guide wheel 1322 is installed at the four corners of the carrier bracket 131 to facilitate the carrier 13 to enter and move out of the lifting platform 111. The positioning seat 132 is installed in the middle of the upper surface of the carrier bracket 131, and the clamping plate 1321 is installed on the positioning seat 132. The clamping plate 1321 cooperates with the positioning seat 132 to clamp the workpiece to be welded.

[0068] The present invention uses the carrier 13 to fix the workpiece to be welded, which can simplify the loading action.

[0069] The carrier 13 also includes a loading plate 1323, two loading plates 1323 are respectively located on both sides of the positioning seat 132, and each loading plate 1323 is respectively installed on the buffer lifting mechanism 133. The loading plate 1323 is provided with a protrusion and a groove matching the battery module, so as to facilitate manual movement of the battery module to the carrier 13 and alignment. The buffer lifting mechanism 133 adopts a spring structure, and the loading plate 1323 can be raised and lowered by the spring to provide buffering for the battery module, and automatically attached according to the height of the battery module.

[0070] The carrier 13 is provided with a loading plate 1323 installed on the buffer lifting mechanism 133, which can play a buffering role.

[0071] like Figure 1 As shown, the transporting part 20 includes a first transporting mechanism 21 and a second transporting mechanism 22, and the first transporting mechanism 21 and the second transporting mechanism 22 are horizontally movably mounted on a transporting bracket 23. The first transporting mechanism 21 is used to transport the workpiece to be welded from the loading part 10 to the welding part 30, and the second transporting mechanism 22 is used to transport the welded workpiece out of the welding part 30. The structure of the second transporting mechanism 22 is the same as or different from that of the first transporting mechanism 21. Since the battery module and the package cover have been welded, the second transporting mechanism 22 does not require high precision, and only needs to realize the transport action.

[0072] When the first conveying mechanism 21 takes the material at the loading position, the second conveying mechanism 22 takes the welded battery module at the welding position. The conveying part 20 is provided with two conveying mechanisms, which can simultaneously perform the loading and unloading actions, thereby improving production efficiency.

[0073] like Figure 6 , Figure 7 As shown, the first transport mechanism 21 includes a transport lifting mechanism 211 , a tidying mechanism 212 and a clamping mechanism 213 . The clamping mechanism 213 is installed on the tidying mechanism 212 , and the tidying mechanism 212 is installed on the transport lifting mechanism 211 .

[0074] The first transport mechanism 21 is used for loading and aligning the workpieces to be welded so that the positions thereof are accurate.

[0075] The transport and lifting mechanism 211 can adopt any available structure in the prior art, generally a lead screw slide rail structure, and the tidying mechanism 212 is installed on the lead screw, and the lead screw is driven to rotate by a motor, and then the tidying mechanism 212 is driven to rise and fall along the slide rail.

[0076] like Figure 8 As shown, the clamping mechanism 213 includes a clamping claw cylinder 2131 and a lifting clamping claw 2132 installed on the clamping claw cylinder 2131. The aligning mechanism 212 includes an aligning cylinder 2121 and a aligning plate 2122 installed on the aligning cylinder 2121. The clamping claw cylinder 2131 drives the lifting clamping claw 2132 to open and close, the aligning cylinder 2121 drives the aligning plate 2122 to open and close, and the transport lifting mechanism 211 drives the lifting clamping claw 2132 to rise and fall.

[0077] A photoelectric sensor 215 is also installed on the tidying mechanism 212 to detect whether there is material below, and only go down to take the material if there is material.

[0078] A pressure plate is also installed on the regularization mechanism 212. The pressure plate is used to press the package cover to be welded onto the battery module. The pressure plate can be set to be fixed or spring-buffered, and can slide up and down through a guide rod.

[0079] The first transport mechanism 21 may further include a positioning mechanism 214 mounted on the arranging mechanism 212. Fig. 9 As shown, the positioning mechanism 214 includes a latch cylinder 2141 and a latch 2142 mounted on the latch cylinder 2141. The latch cylinder 2141 is fixed on the regular plate 2122, and the latch 2142 is mounted on the movable part of the latch cylinder 2141. A slide rail 2143 is also installed on the regular plate 2122, and the latch cylinder 2141 drives the latch 2142 to rise and fall along the slide rail 2143.

[0080] The first transport mechanism 21 is provided with a positioning mechanism 214, which can further position the workpiece to be welded. The transport mechanism positions the workpiece through the regular plate and the positioning pin to ensure that the workpiece will not deviate during the transport process.

[0081] The action flow of the first transport mechanism 21 is as follows: the two regularizing cylinders 2121 respectively drive the two regularizing plates 2122 to open, and the clamping cylinder 2131 drives the lifting clamping claw 2132 to open; the transporting and lifting mechanism 211 drives the lifting clamping claw 2132 to descend, and after descending into place, the clamping claw cylinder 2131 drives the lifting clamping claw 2132 to clamp; the two regularizing cylinders 2121 respectively drive the two regularizing plates 2122 to approach each other, thereby clamping and regularizing the workpiece; the latch cylinder 2141 drives the latch 2142 to insert into the preset hole of the workpiece; the transporting and lifting mechanism 211 drives the lifting clamping claw 2132 to rise, thereby lifting the workpiece.

[0082] like Fig.10 As shown, the welding part 30 includes a welding mechanism 31 and a workpiece carrying device 32. The workpiece carrying device 32 can adjust the welding position of the workpiece to facilitate the welding mechanism 31 to complete the welding action.

[0083] The welding mechanism 31 includes a welding machine 311 and a welding machine position adjustment mechanism 312 for adjusting the position of the welding machine 311. The welding machine 311 is generally a laser welding machine.

[0084] like Fig.11As shown, the welding machine position adjustment mechanism 312 includes a front and rear drive mechanism 3121, a left and right drive mechanism 3122 and an up and down drive mechanism 3123. The welding machine 311 is mounted on the up and down drive mechanism 3123, the up and down drive mechanism 3123 is mounted on the left and right drive mechanism 3122, and the left and right drive mechanism 3122 is mounted on the front and rear drive mechanism 3121. The front and rear drive mechanism 3121, the left and right drive mechanism 3122 and the up and down drive mechanism 3123 can adopt any structure in the prior art, and generally adopt a lead screw slide rail structure, which will not be repeated here.

[0085] The welding machine position adjustment mechanism 312 includes a front-rear drive mechanism, a left-right drive mechanism, and an up-down drive mechanism, which can adjust the position of the welding machine 311 in space to facilitate welding.

[0086] like Fig.10 As shown, the workpiece carrying device 32 includes a fixing device 321 and a rotating device 322 . The fixing device 321 is used to fix the workpiece to be welded, and the rotating device 322 is used to drive the fixing device 321 to rotate.

[0087] like Fig.12 , Fig.13 and Fig.14 As shown, the fixing device 321 includes a welding platform 3210 , a front and rear clamping mechanism 3211 , and a left and right clamping mechanism 3214 . The front and rear clamping mechanism 3211 and the left and right clamping mechanism 3214 are respectively installed on opposite sides of the welding platform 3210 .

[0088] The fixing device 321 includes a front and rear clamping mechanism 3211 and a left and right clamping mechanism 3214, which can fix the workpiece from two opposite sides of the workpiece to improve the reliability of the fixation.

[0089] The front and rear pressing mechanism 3211 includes front and rear pressing blocks 3212 and front and rear pressing cylinders 3213. The front and rear pressing blocks 3212 are mounted on the movable part of the front and rear pressing cylinders 3213. The front and rear pressing cylinders 3213 drive the front and rear pressing blocks 3212 to move on the guide rails to press or loosen the workpiece to be welded. The front and rear pressing blocks 3212 are provided with channels for leaving gaps at the welding positions.

[0090] The front and rear clamping mechanism 3211 adopts a combination of a clamping block and a cylinder, which has a simple structure and is easy to operate.

[0091] The left and right clamping mechanism 3214 includes a driving cylinder 3215, left and right pressure blocks 3216, left and right clamping cylinders 3217, a top block 3218 and a top block cylinder 3219. The top block cylinder 3219 and the left and right clamping cylinders 3217 are installed on the movable part of the driving cylinder 3215 through a connecting plate. The top block 3218 is installed on the movable part of the top block cylinder 3219. The left and right pressure blocks 3216 are installed on the movable part of the left and right clamping cylinders 3217.

[0092] The driving cylinder 3215 drives the top block cylinder 3219 and the left and right pressing cylinders 3217 to move horizontally, the left and right pressing cylinders 3217 drive the left and right pressing blocks 3216 to move up and down, and the top block cylinder 3219 drives the top block 3218 to extend or retract.

[0093] The left and right clamping mechanisms 3214 adopt a combination of a clamping block and a cylinder, which has a simple structure and is easy to operate.

[0094] like Fig.10 As shown, a photoelectric detector 323 is also installed on the workpiece carrying device 32. The photoelectric detector 323 is used to detect whether there is material on the fixing device 321, so as to prevent the laser of the laser welding machine from being triggered by mistake.

[0095] like Fig.15 As shown, the rotating device 322 includes a rotating shaft 3221 and a rotating shaft driving mechanism 3222, and the welding platform 3210 is fixedly connected to the rotating shaft 3221. The rotating shaft driving mechanism 3222 generally adopts a synchronous belt structure, including a synchronous belt 3223 and a rotating motor 3224. The rotating motor 3224 of the rotating shaft driving mechanism 3222 is actuated to drive the rotating shaft 3221 to rotate through the synchronous belt 3223, and then drives the welding platform 3210 to rotate, usually by 180 degrees. The rotating device 322 is used to rotate the workpiece to be welded, so that other parts can be welded, thereby improving production efficiency.

[0096] like Fig.11 As shown, the welding part 30 also includes a welding machine angle adjustment mechanism 3111, and the welding machine 311 is installed on the welding machine angle adjustment mechanism 3111, and the welding machine angle adjustment mechanism 3111 is installed on the upper and lower driving mechanism 3123. The welding machine 311 is installed on the welding machine angle adjustment mechanism 3111, which is convenient for adjusting the welding position of the welding machine 311.

[0097] The welding part 30 further includes an exhaust cylinder 3112 for extracting welding waste gas, and the exhaust cylinder 3112 is installed on the welding machine 311. The welding part 30 is provided with an exhaust cylinder 3112, which can be used to extract welding waste gas and protect the health of operators.

[0098] The exhaust cylinder 3112 can also be installed on the exhaust cylinder angle adjustment mechanism 3113, and the exhaust cylinder angle adjustment mechanism 3113 is installed on the welding machine 311. The exhaust cylinder 3112 is installed on the exhaust cylinder angle adjustment mechanism 3113, which is convenient for adjusting the position of the exhaust cylinder 3112 and improving the effect of extracting welding exhaust gas.

[0099] Optionally, the welding part 30 also includes a displacement sensor 313, which is used to measure the precise distance from the laser welding machine 311 to the welding point on the plane to be welded, so that the front and rear driving mechanism 3121 drives the laser welding machine 311 to move to the most suitable position, ensuring that the welding point is always in the most suitable position for welding, thereby ensuring the welding quality.

[0100] The movement steps of the welding part 30 are as follows:

[0101] 1. The front and rear pressing mechanisms 3211 and the left and right pressing mechanisms 3214 in the fixing device 321 press the package cover and the battery module;

[0102] 2. The driving mechanisms in three directions of the welding part 30 first drive the laser welding machine 311 to a predetermined position, which is obtained by pre-calibration. After reaching the predetermined position, the distance between the laser welding machine 311 and the welding point is fine-tuned according to the distance detected by the distance sensor, and welding is performed after the adjustment is completed;

[0103] 3. The laser welding machine 311 first welds from top to bottom at the first position 106, and the welding points are in a straight line. The left and right driving mechanisms 3122 drive the laser welding machine 311 to move to the second position 107, and weld the second position 107 in the same way;

[0104] 4. The laser welding machine 311 first retreats a certain distance, and the rotating device 322 drives the fixing device 321 to rotate 180 degrees;

[0105] 5. The welding part 30 welds the third position and the fourth position in the same welding manner, and the movement steps are the same as the welding manner of the first position 106 and the second position 107;

[0106] 6. After welding is completed, all mechanisms return to their original positions.

[0107] like Figure 1 As shown, the battery module cover welding device may further include a material discharge portion 40, which is used to remove the welded workpiece from the welding portion 30. The material discharge portion 40 may adopt any known structure, and in this embodiment, a lifting structure similar to the material discharge portion 10 is adopted.

[0108] By providing the unloading portion 40, the welded workpiece can be sent to the next workstation, further improving the production efficiency.

[0109] The present invention has been described in sufficient detail with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A battery module cover welding device, used for welding the cover to the battery module, characterized in that: The battery module cover welding device comprises a loading part, a conveying part and a welding part; wherein: The loading part is located at the front station of the welding part, and is used to carry the workpiece to be welded, and the workpiece to be welded includes a battery module and a package cover covering at least one side of the battery module; The transporting portion is configured to move between the loading portion and the welding portion, and is used to transport the workpiece to be welded from the loading portion to the welding portion, and to transport the welded workpiece away from the welding portion; The welding part is used to weld the workpieces to be welded into one body; The loading part includes a lifting mechanism, a lifting platform and a clamping mechanism; the lifting platform is installed on the lifting mechanism, and the lifting mechanism drives the lifting platform to perform lifting movement; the clamping mechanism positions the workpiece to be welded on the lifting platform; the lifting platform is provided with a carrier for fixing the workpiece to be welded; The carrier includes a carrier bracket, a positioning seat, a clamping plate and a guide wheel, wherein the guide wheel is installed on the four corners of the carrier bracket, the positioning seat is installed in the middle of the upper surface of the carrier bracket, the clamping plate is installed on the positioning seat, and the clamping plate cooperates with the positioning seat to clamp the workpiece to be welded; the carrier also includes a loading plate, two loading plates are respectively located on both sides of the positioning seat, and each loading plate is respectively installed on the buffer lifting mechanism; each loading plate is respectively provided with a protrusion and a groove matching the battery module; The conveying part includes a first conveying mechanism and a second conveying mechanism. The first conveying mechanism and the second conveying mechanism can be horizontally movably installed on a conveying bracket. The first conveying mechanism is used to convey the workpiece to be welded from the loading part to the welding part, and the second conveying mechanism is used to move the welded workpiece out of the welding part. The structure of the second conveying mechanism is the same as or different from that of the first conveying mechanism.

2. The battery module cover welding device according to claim 1, characterized in that: The clamping mechanism is installed on two opposite sides of the lifting platform facing each other. At least two parallel electric rollers are installed on the lifting platform. The electric roller is located between the two clamping mechanisms. The electric roller rolls to drive the workpiece to be welded placed on the electric roller to move along the rolling direction of the electric roller.

3. The battery module cover welding device according to claim 1, characterized in that: Each of the clamping mechanisms comprises a clamping cylinder and a clamping wheel. The clamping cylinders of the two clamping mechanisms respectively drive the clamping wheels to extend or retract, thereby clamping or loosening the workpiece to be welded between the two clamping mechanisms.

4. The battery module cover welding device according to claim 1, characterized in that: The first transporting mechanism includes a transporting and lifting mechanism, a tidying mechanism and a clamping mechanism, the clamping mechanism is installed on the tidying mechanism, and the tidying mechanism is installed on the transporting and lifting mechanism; the clamping mechanism includes a clamping cylinder and a lifting clamp installed on the clamping cylinder, and the tidying mechanism includes a tidying cylinder and a tidying plate installed on the tidying cylinder; the clamping cylinder drives the lifting clamp to open and close, the tidying cylinder drives the tidying plate to open and close, and the transporting and lifting mechanism drives the lifting clamp to rise and fall.

5. The battery module cover welding device according to claim 4, characterized in that: The first transport mechanism further comprises a positioning mechanism installed on the arranging mechanism, wherein the positioning mechanism comprises a latch cylinder and a latch installed on the latch cylinder, and the latch cylinder drives the latch to rise and fall.

6. The battery module cover welding device according to claim 1, characterized in that: The welding part includes a welding mechanism and a workpiece carrying device, the welding mechanism includes a welding machine and a welding machine position adjustment mechanism for adjusting the position of the welding machine, the workpiece carrying device includes a fixing device and a rotating device, the fixing device is used to fix the workpiece to be welded, and the rotating device is used to drive the fixing device to rotate.

7. The battery module cover welding device according to claim 6, characterized in that: The welding machine position adjustment mechanism includes a front and rear drive mechanism, a left and right drive mechanism and an up and down drive mechanism, the welding machine is installed on the up and down drive mechanism, the up and down drive mechanism is installed on the left and right drive mechanism, and the left and right drive mechanism is installed on the front and rear drive mechanism.

8. The battery module cover welding device according to claim 6, characterized in that: The fixing device comprises a welding platform, a front and rear clamping mechanism and a left and right clamping mechanism, and the front and rear clamping mechanism and the left and right clamping mechanism are respectively installed on two opposite sides of the welding platform.

9. The battery module cover welding device according to claim 8, characterized in that: The rotating device comprises a rotating shaft and a rotating shaft driving mechanism. The welding platform is fixedly connected to the rotating shaft. The rotating shaft driving mechanism drives the rotating shaft to rotate and further drives the welding platform to rotate.

10. The battery module cover welding device according to claim 7, characterized in that: The welding part further comprises a welding machine angle adjustment mechanism, the welding machine is mounted on the welding machine angle adjustment mechanism, and the welding machine angle adjustment mechanism is mounted on the up and down driving mechanism.

11. The battery module cover welding device according to claim 1, characterized in that: The battery module cover welding device also includes a material removal portion, which is used to remove the welded workpiece from the welding portion.

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