Laser welding equipment for square lithium battery cover plate

Abstract

The utility model relates to laser welding equipment for a square lithium battery cover plate, which comprises a feeding mechanism and a welding mechanism, the feeding mechanism comprises a feeding frame, a feeding bottom plate movably arranged on the top of the feeding frame, a lifting plate arranged on the top of the feeding bottom plate in a lifting mode, a carrier adjustably arranged on the top of the lifting plate and a clamping assembly arranged on the carrier. The welding mechanism comprises a welding frame arranged on one side of the feeding frame, a through groove penetrating through the welding frame, adjusting plates adjustably arranged on the two sides of the through groove and first pressing plates movably arranged on the tops of the adjusting plates. The welding efficiency is greatly improved, welding is divided into two steps of pre-welding and full-length welding, the welding effect is better, the welding precision is higher, the yield of finished products is improved, and meanwhile the labor cost input is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery processing, in particular to a square lithium battery cover plate laser welding device. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. During the production process of lithium batteries, a cover plate needs to be welded above the metal top rod of the lithium battery to seal the positive and negative electrodes and electrolyte of the battery to prevent leakage of the electrolyte and avoid safety accidents. At the same time, the cover plate also has the functions of stabilizing the internal pressure of the battery, balancing the electrochemical reaction, and preventing interference from external substances.

[0003] Existing lithium battery cover welding is mostly done manually, that is, the lithium battery with the cover is placed on the welding machine, and the operator is required to manually assist in the welding. This will lead to low welding efficiency and cannot meet the task requirements of large-scale battery cover welding. Moreover, different operators have different welding habits, and the qualification rate of the finished product after welding cannot be guaranteed, and there is a need for subsequent rework. Utility Model Content

[0004] The utility model aims to provide a square lithium battery cover plate laser welding device, which solves the defects that the existing lithium battery cover plate welding needs manual assistance, has low welding efficiency and cannot guarantee the qualified rate of finished products after welding.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: the utility model provides a square lithium battery cover laser welding device, which includes:

[0006] A feeding mechanism, the feeding mechanism comprising a feeding rack, a feeding bottom plate movably arranged on the top of the feeding rack, a lifting plate movably arranged on the top of the feeding bottom plate, a carrier rack adjustably arranged on the top of the lifting plate, and a clamping assembly arranged on the carrier rack;

[0007] A welding mechanism, the welding mechanism comprising a welding frame arranged on one side of the feeding frame, a through slot penetrating the welding frame, an adjusting plate adjustably arranged on both sides of the through slot, a first pressing plate movably arranged on the top of the adjusting plate, a second pressing plate movably arranged on the top of the welding frame, and a pre-welding assembly arranged on the top of the first pressing plate, wherein the pressing directions of the first pressing plate and the second pressing plate are perpendicular;

[0008] A manipulator, which is arranged on one side of the feeding mechanism and is used to take and place the lithium battery on the clamping assembly;

[0009] A welding head is arranged above the welding mechanism and is used for welding the lithium battery between the first pressing plate and the second pressing plate.

[0010] Optimally, the clamping assembly includes a pallet fixed on the top of the carrier, a baffle adjustably arranged on the outside of one set of opposite sides of the pallet, and a clamp movably arranged on the outside of another set of opposite sides of the pallet, and the baffle and clamp are used to clamp the lithium battery.

[0011] Optimally, the feeding mechanism also includes an adjusting slide rail fixed on the top of the lifting plate, an adjusting slider slidably mounted on the adjusting slide rail, a limit plate fixed on the top of the lifting plate and located on the outside of the adjusting slide rail, and a limit screw screwed on the limit plate and abutted against the outside of the carrier, and the carrier is fixed on the adjusting slider.

[0012] Optimally, the pre-welding assembly includes a pre-pressing plate slidably mounted on the top of the first clamping plate, a pressing block integrally connected to the inner side of the pre-pressing plate and arranged at intervals, and a pre-welding groove opened on the pressing block.

[0013] Optimally, the pre-welding assembly also includes a pre-stressing slide rail fixed on the top of the first clamping plate, a pre-stressing slider slidably mounted on the pre-stressing slide rail, a fixed plate fixed on the top of the first clamping plate and located on one side of the pre-stressing slide rail, a guide column fixed on the pre-stressing plate and passing through the fixed plate, and a spring sleeved on the guide column, and the pre-stressing plate is fixed on the pre-stressing slider.

[0014] Optimally, the feeding mechanism also includes a feeding slide rail fixed on the top of the feeding rack, a feeding slider slidably mounted on the feeding slide rail, a connecting block fixed on the feeding slider and connected to one side of the feeding base plate, and a rodless cylinder fixed on the feeding rack and connected to the other side of the feeding base plate.

[0015] Optimally, the feeding mechanism further comprises a guide sleeve embedded in the feeding bottom plate and a guide column fixed to the bottom of the lifting plate and passing through the guide sleeve.

[0016] Optimally, the feeding mechanism further comprises a first adjusting slot provided on the baffle plate and a clamping cylinder fixed on the top of the carrier and connected to the clamping plate.

[0017] Optimally, the welding mechanism also includes a clamping slide rail fixed on the top of the adjustment plate, a clamping slider slidably mounted on the clamping slide rail, a contact block fixed on one side of the first clamping plate, and an oil pressure buffer fixed on the top of the adjustment plate and cooperating with the contact block, and the first clamping plate is fixed on the clamping slider.

[0018] Optimally, the welding mechanism further includes a second adjustment slot provided on the adjustment plate.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] When welding lithium batteries, the square lithium battery cover plate laser welding equipment of the utility model places the battery into the clamping assembly through the robot arm, then pushes it under the welding station, and then transports it to the welding position through the module lifting; the Z-axis lifting height is limited by the pre-pressing plate, and the first clamping plate and the second clamping plate realize the tightening in the X / Y-axis direction, and then laser dot pre-welding is performed first, and laser full welding is performed after the pre-welding is completed, which greatly improves the welding efficiency, and divides the welding into two steps of pre-welding and full welding, so that the welding effect is better and the welding accuracy is higher. While improving the yield of finished products, it also saves labor cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the feeding mechanism of the utility model;

[0024] Figure 3 It is a partial structural schematic diagram of the feeding mechanism of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the welding mechanism of the utility model;

[0026] Figure 5 It is a top view of the welding mechanism of the utility model;

[0027] Figure 6 It is a partial structural schematic diagram of the welding mechanism of the utility model;

[0028] The reference numerals are described as follows:

[0029] 1. Robotic arm;

[0030] 2. Feeding mechanism; 21. Feeding rack; 22. Feeding bottom plate; 23. Feeding slide rail; 24. Feeding slider; 25. Connecting block; 26. Rodless cylinder; 27. Guide sleeve; 28. Guide column; 29. ​​Lifting plate; 210. Adjusting slide rail; 211. Adjusting slider; 212. Limiting plate; 213. Limiting screw; 214. Carrying rack; 215. Support plate; 216. Baffle; 217. First adjusting slot; 218. Clamping cylinder; 219. Clamping plate;

[0031] 3. Welding mechanism; 31. Welding frame; 32. Through slot; 33. Adjustment plate; 34. Second adjustment slot; 35. Pressing rail; 36. Pressing slider; 37. First pressing plate; 38. Contact block; 39. Oil pressure buffer; 310. Second pressing plate; 311. Pre-pressing rail; 312. Pre-pressing slider; 313. Pre-pressing plate; 314. Pressing block; 315. Pre-welding slot; 316. Fixing plate; 317. Guide column; 318. Spring;

[0032] 4. Welding head. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] like Figure 1 The figure shows the schematic diagram of the structure of the laser welding device for square lithium battery cover of the utility model, which is used for the automatic welding transfer of the lithium battery cover seal, and includes a manipulator 1, a feeding mechanism 2, a welding mechanism 3 and a welding head 4. The manipulator 1 clamps the lithium battery to be welded and places it on the feeding mechanism 2, which transfers it to the welding mechanism 3 for clamping, and finally completes the automatic welding of the lithium battery cover seal through the welding head 4 above.

[0037] like Figure 2 , 3, which is a schematic diagram of the structure of the feeding mechanism 2, and the feeding mechanism 2 is used to receive the lithium battery transferred thereto by the manipulator 1 and transport it to the welding mechanism 3. The feeding mechanism 2 includes a feeding rack 21, a feeding bottom plate 22, a feeding slide rail 23, a feeding slider 24, a connecting block 25, a rodless cylinder 26, a guide sleeve 27, a guide column 28, a lifting plate 29, an adjustment slide rail 210, an adjustment slider 211, a limit plate 212, a limit screw 213, a carrier 214 and a clamping assembly. The feeding rack 21 is made of aluminum profiles through welding technology and is used to support the remaining structures.

[0038] The rodless cylinder 26 is fixed on the top of the feeding rack 21, and the feeding base plate 22 is connected to the rodless cylinder 26. The rodless cylinder 26 drives the feeding base plate 22 to move on the top of the feeding rack 21 to transport lithium batteries. The feeding rail 23 is fixed to the top of the feeding rack 21 by screw fastening, and the feeding slider 24 is slidably installed on the feeding rail 23. The connecting block 25 is fixed on the feeding slider 24 and connected to the feeding base plate 22. When the rodless cylinder 26 drives the feeding base plate 22 to move, it will drive the connecting block 25 and the feeding slider 24 to move synchronously along the feeding rail 23 to improve the stability and position accuracy of the feeding base plate 22 when it moves, and prevent it from tilting under the action of gravity.

[0039] The lifting plate 29 is arranged above the feeding bottom plate 22, and is driven by an external lifting slide or a lifting cylinder to lift the lithium battery to the welding mechanism 3 for welding. The guide sleeve 27 is embedded in the feeding bottom plate 22, and the guide column 28 is fixed to the bottom of the lifting plate 29 and penetrates the guide sleeve 27. When the lifting plate 29 is lifting, it will drive the guide column 28 to rise and fall synchronously in the guide sleeve 27, and the stability of the lifting plate 29 is ensured by the guide cooperation between the two.

[0040] The object carrier 214 is arranged on the top of the lifting plate 29 and is connected to the lifting plate 29 through the adjusting rail 210 and the adjusting slider 211. The limiting plate 212 is fixed on the top of the lifting plate 29 and is located on both sides of the length direction of the adjusting rail 210. The limiting screw 213 is screwed in the limiting plate 212 and abuts against the outer side of the object carrier 214. By screwing the limiting screw 213 on the limiting plate 212, the position of the object carrier 214 on the top of the lifting plate 29 can be appropriately adjusted to match the pick-up and placement position of the manipulator 1.

[0041] The gripping assembly is arranged on the top of the carrier 214, and is used to grip the lithium battery transferred thereto by the manipulator 1, and prevent the position of the lithium battery from being offset when the lithium battery is transferred. The gripping assembly includes a support plate 215, a baffle 216, a first adjustment slot 217, a gripping cylinder 218, and a clamping plate 219. The support plate 215 is fixed on the top of the carrier 214, and is used to carry the lithium battery transferred thereto by the manipulator 1, and the support plate 215 has a set of long sides and a set of short sides arranged oppositely.

[0042] There are two baffles 216, which are adjustably arranged on the top of the carrier 214 and located on the short side of the support plate 215. The first adjustment slot 217 is in a rounded rectangular shape, opened on the baffle 216, and fixed with nuts to complete the baffle 216. By adjusting the position of the baffle 216, it can meet the needs of clamping lithium batteries of different sizes, so as to improve versatility.

[0043] The clamping cylinder 218 is fixed on the inner side of the carrier 214, and the clamping plate 219 is fixed on the outer side of the clamping cylinder 218 and close to the long side of the support plate 215. The clamping cylinder 218 drives the clamping plate 219 to move inward to clamp the lithium battery on the support plate 215 to prevent the lithium battery from shifting during transfer.

[0044] like Figure 4-6 The figure shows the structure of the welding mechanism 3. The welding mechanism 3 is arranged on one side of the feeding mechanism 2, and is used to clamp the lithium battery, and cooperate with the welding head 4 above to complete the sealing welding of the lithium battery cover. The welding mechanism 3 includes a welding frame 31, a through groove 32, an adjustment plate 33, a second adjustment groove 34, a clamping slide rail 35, a clamping slider 36, a first clamping plate 37, a contact block 38, an oil pressure buffer 39, a second clamping plate 310 and a pre-pressing assembly. The welding frame 31 is also welded from aluminum profiles and plays a supporting role.

[0045] The through groove 32 vertically passes through the welding frame 31. After the feeding mechanism 2 transports the lithium battery to the bottom of the welding mechanism 3, the lifting plate 29 drives the lithium battery to rise into the through groove 32, and then the first clamping plates 37 on both sides complete the clamping work of the lithium battery, avoiding the position displacement of the lithium battery during subsequent pre-welding and full welding, thereby affecting the effect after welding.

[0046] The adjustment plate 33 is adjustably arranged on both sides of the through slot 32, and a second adjustment slot 34 of a rounded rectangular shape is opened on the adjustment plate 33, and then nuts are used to fix the adjustment plate 33. The position of the adjustment plate 33 can be appropriately adjusted according to the different specifications of the lithium battery to be welded, thereby improving the versatility of the equipment.

[0047] The clamping rail 35 is fixed to the top of the adjustment plate 33 by screw fastening, the clamping slider 36 is slidably mounted on the clamping rail 35, the first clamping plate 37 is fixed to the top of the clamping slider 36, and moves inward under the action of the external push cylinder to clamp the lithium battery. The contact block 38 is fixed to the outside of the first clamping plate 37, and the oil pressure buffer 39 is fixed to the top of the adjustment plate 33 and cooperates with the contact block 38. The oil pressure buffer 39 can convert the kinetic energy generated by the moving object into heat energy and release it into the atmosphere, and effectively stop the object in balance during the action.

[0048] The second pressing plate 310 is disposed on the top of the welding frame 31 through a movable cylinder and is located on the other two sides of the through slot 32. The second pressing plate 310 and the first pressing plate 37 have a pressing direction perpendicular to each other, and together they complete the pressing work of the lithium battery.

[0049] The pre-pressing assembly is arranged at the top of the first clamping plate 37, and is used to limit the lifting height of the lithium battery, and cooperate with the welding head 4 above to complete the pre-welding of the lithium battery cover. The pre-pressing assembly includes a pre-pressing rail 311, a pre-pressing slider 312, a pre-pressing plate 313, a pressing block 314, a pre-welding groove 315, a fixing plate 316, a guide column 317 and a spring 318. The pre-pressing rail 311 is fixed to the top of the first clamping plate 37 by screw fastening, the pre-pressing slider 312 is slidably mounted on the pre-pressing rail 311, the pre-pressing plate 313 is fixed on the pre-pressing slider 312, and a moving cylinder is arranged on the outer side of the pre-pressing plate 313, which is used to push the pre-pressing plate 313 to move inward to limit the lifting height of the lithium battery, and cooperate with the welding head 4 above to complete the pre-welding of the lithium battery cover (the moving cylinder connected to the pre-pressing plate 313 is not shown in the figure).

[0050] The fixing plate 316 is fixed on the top of the first pressing plate 37, the guide post 317 is fixed on the outside of the pre-pressing plate 313 and penetrates the fixing plate 316, and the end of the guide post 317 away from the pre-pressing plate 313 is integrally provided with an anti-drop cap, and the diameter of the anti-drop cap is larger than the diameter of the guide post 317. The spring 318 is sleeved on the guide post 317 and is located between the anti-drop cap and the fixing plate 316. After the pre-welding is completed, the pre-pressing plate 313 is conveniently retreated under the action of the spring 318, and then the lithium battery cover is fully welded.

[0051] The pressing block 314 is integrally connected to the inner side of the pre-pressing plate 313 and is arranged at intervals. The pre-welding groove 315 is opened on the pressing block 314. When pre-welding the lithium battery cover plate, the upper welding head 4 pre-welds the lithium battery cover plate through the pre-welding groove 315. After the pre-welding is completed, it is fully welded.

[0052] The welding principle of the square lithium battery cover laser welding equipment of the utility model is as follows:

[0053] First, the robot 1 places the lithium battery to be welded on the support plate 215, and after being clamped by the clamping assembly, it is transported to the bottom of the welding mechanism 3 by the rodless cylinder 26, and then driven by the lifting plate 29 to rise into the through groove 32;

[0054] The first clamping plate 37 and the second clamping plate 310 move inward to clamp the lithium battery, and the pre-pressing plate 313 moves inward to limit the height of the lithium battery. After the welding head 4 completes the pre-welding of the lithium battery cover through the pre-welding groove 315, the pre-pressing plate 313 retreats, and the welding head 4 then fully welds the lithium battery cover. After full welding, the lithium battery is returned along the original route, and the robot 1 completes the unloading.

[0055] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A square lithium battery cover laser welding device, characterized in that: It includes: A feeding mechanism (2), the feeding mechanism (2) comprising a feeding frame (21), a feeding bottom plate (22) movably arranged on the top of the feeding frame (21), a lifting plate (29) movably arranged on the top of the feeding bottom plate (22), a material carrier (214) adjustably arranged on the top of the lifting plate (29), and a clamping assembly arranged on the material carrier (214); A welding mechanism (3), the welding mechanism (3) comprising a welding frame (31) arranged on one side of a feeding frame (21), a through slot (32) penetrating the welding frame (31), an adjustment plate (33) adjustably arranged on both sides of the through slot (32), a first clamping plate (37) movably arranged on the top of the adjustment plate (33), a second clamping plate (310) movably arranged on the top of the welding frame (31), and a pre-welding assembly arranged on the top of the first clamping plate (37), wherein the clamping directions of the first clamping plate (37) and the second clamping plate (310) are perpendicular to each other; A manipulator (1), the manipulator (1) being arranged on one side of the feeding mechanism (2) and being used for taking and placing the lithium battery on the clamping assembly; A welding head (4), the welding head (4) being arranged above the welding mechanism (3) and being used for welding the lithium battery between the first pressing plate (37) and the second pressing plate (310).

2. A square lithium battery cover laser welding device according to claim 1, characterized in that: The clamping assembly comprises a support plate (215) fixed on the top of a carrier (214), a baffle plate (216) adjustably arranged on the outside of one group of opposite sides of the support plate (215), and a clamping plate (219) movably arranged on the outside of another group of opposite sides of the support plate (215), wherein the baffle plate (216) and the clamping plate (219) are used to clamp lithium batteries.

3. The square lithium battery cover laser welding equipment according to claim 1, characterized in that: The feeding mechanism (2) further comprises an adjusting slide rail (210) fixed on the top of the lifting plate (29), an adjusting slider (211) slidably mounted on the adjusting slide rail (210), a limiting plate (212) fixed on the top of the lifting plate (29) and located outside the adjusting slide rail (210), and a limiting screw (213) screwed on the limiting plate (212) and abutting against the outside of a carrier (214), wherein the carrier (214) is fixed on the adjusting slider (211).

4. The square lithium battery cover laser welding equipment according to claim 1, characterized in that: The pre-welding assembly comprises a pre-pressing plate (313) slidably mounted on the top of a first pressing plate (37), a pressing block (314) integrally connected to the inner side of the pre-pressing plate (313) and arranged at intervals, and a pre-welding groove (315) provided on the pressing block (314).

5. A square lithium battery cover laser welding device according to claim 4, characterized in that: The pre-welding assembly also includes a pre-stressing slide rail (311) fixed on the top of the first clamping plate (37), a pre-stressing slider (312) slidably mounted on the pre-stressing slide rail (311), a fixed plate (316) fixed on the top of the first clamping plate (37) and located on one side of the pre-stressing slide rail (311), a guide column (317) fixed on the pre-stressing plate (313) and passing through the fixed plate (316), and a spring (318) sleeved on the guide column (317), and the pre-stressing plate (313) is fixed on the pre-stressing slider (312).

6. The square lithium battery cover laser welding equipment according to claim 1, characterized in that: The feeding mechanism (2) further comprises a feeding slide rail (23) fixed on the top of the feeding rack (21), a feeding slider (24) slidably mounted on the feeding slide rail (23), a connecting block (25) fixed on the feeding slider (24) and connected to one side of the feeding bottom plate (22), and a rodless cylinder (26) fixed on the feeding rack (21) and connected to the other side of the feeding bottom plate (22).

7. The square lithium battery cover laser welding equipment according to claim 1, characterized in that: The feeding mechanism (2) further comprises a guide sleeve (27) embedded in the feeding bottom plate (22) and a guide column (28) fixed to the bottom of the lifting plate (29) and penetrating the guide sleeve (27).

8. The square lithium battery cover laser welding equipment according to claim 2, characterized in that: The feeding mechanism (2) further comprises a first adjusting slot (217) provided on the baffle plate (216) and a clamping cylinder (218) fixed on the top of the carrier (214) and connected to the clamping plate (219).

9. The square lithium battery cover laser welding equipment according to claim 1, characterized in that: The welding mechanism (3) also includes a clamping slide rail (35) fixed on the top of the adjustment plate (33), a clamping slider (36) slidably mounted on the clamping slide rail (35), a contact block (38) fixed on one side of the first clamping plate (37), and an oil pressure buffer (39) fixed on the top of the adjustment plate (33) and matched with the contact block (38), wherein the first clamping plate (37) is fixed on the clamping slider (36).

10. The square lithium battery cover laser welding equipment according to claim 1, characterized in that: The welding mechanism (3) also includes a second adjustment slot (34) formed on the adjustment plate (33).

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