Soft package welding pressure head

Abstract

The utility model relates to the technical field of soft package welding, and discloses a soft package welding pressure head which comprises a pressure head body of a triangular structure, a through groove is formed in the middle of the pressure head body and penetrates through the whole pressure head body, and two counter bores are formed in the left side and the right side, close to the through groove, of the surface of one end of the pressure head body. The counter bore extends from the top of the pressing head to the middle of the pressing head, the counter bore is a cylindrical counter bore, the pressing head is fixedly connected to the surface of one end of the connecting piece, the connecting piece is fixedly connected to the surface of one end of the sliding plate through a bolt, the sliding plate is slidably connected to the surface of one end of the laser welding machine, and the laser welding machine is arranged on the workbench. According to the utility model, through the arrangement of the triangular structure of the pressure head, the connection effect that the tabs are completely overlapped and welded can be met, the structural strength of the welding pressure head is increased, the contact area between the pressure head and the welded tabs is increased, and the phenomena of insufficient welding, explosive welding and the like caused by dislocation and non-compression are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of soft package welding, in particular to a soft package welding pressure head. Background Art

[0002] Soft pack battery welding refers to the welding process of connecting soft pack lithium battery cells. Soft pack batteries are usually composed of positive electrode sheets, negative electrode sheets and separators, which need to be connected together by welding to form a complete battery cell.

[0003] After searching, a soft-packed pole ear laser welding pressure head is disclosed in the announcement number: CN217166956U, including a connecting part and a welding part, the connecting part is used to connect the pressure head body with the laser welding device, a vertical downward welding groove is arranged in the welding part, the welding groove extends from the upper end face of the welding part to the lower end face, the two end faces of the welding groove are arranged in parallel and are both rectangular, a plurality of partitions are arranged in the welding groove, one end of the partition extends out of the lower end face of the welding part, the partitions are evenly arranged at intervals to divide the lower end face of the welding groove into a plurality of welding holes, and the areas corresponding to the plurality of welding holes are the same; the partitions will press the busbar tightly against the battery pole ear to reduce the occurrence of cold welding, the welding surface in each welding hole is larger, and the contact surface of the battery cell is increased, so that the current carrying capacity can be improved and the connection internal resistance can be reduced; after multiple sections of welding, the middle unwelded part still maintains the tensile strength of the original material to reduce the possibility of fracture.

[0004] In the above application, the long tabs need to be welded repeatedly, which may result in cold welding. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a soft package welding pressure head, which aims to improve the problem of cold welding when welding long pole ears.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a soft-pack welding pressure head, including a pressure head, the pressure head is a triangular structure, a through groove is opened in the middle of the pressure head, the through groove runs through the entire pressure head, and two countersunk holes are opened on the left and right sides of the surface of one end of the pressure head close to the through groove.

[0007] Preferably, the countersink extends from the top to the middle of the pressure head, and the countersink is a cylindrical countersink.

[0008] Preferably, the pressure head is fixedly connected to one end surface of the connecting member, the connecting member is fixedly connected to one end surface of the slide plate by bolts, the slide plate is slidably connected to one end surface of the laser welding machine, the laser welding machine is arranged on a workbench, a first pipe is arranged on the left side of the pressure head, the other end of the first pipe is fixedly connected to the suction end of the vacuum pump, the exhaust hole of the vacuum pump is fixedly connected to the second pipe, the other end of the second pipe is fixedly connected to the air inlet of the purification box, the interior of the purification box is fixedly connected to a partition, a vent hole is provided on the upper part of the partition, a purification liquid is arranged on the left side of the partition, activated carbon is arranged on the upper right part of the partition, a filter plate is arranged in the middle part of the right side of the partition, the end of the purification box away from the second pipe is fixedly connected to the third pipe, and a clamping assembly is arranged in the middle part of one end surface of the workbench.

[0009] Preferably, the clamping assembly includes an electric push rod, a guide rail and a clamping frame, the electric push rod is fixedly connected to the middle part of one end surface of the workbench, one end surface of the workbench is fixedly connected to two guide rails, one end surface of the guide rail is slidably connected to a mounting plate, the output end of the electric push rod is fixedly connected to one of the mounting plates, one end surface of the mounting plate away from the guide rail is fixedly connected to a rack, the other end of the rack is fixedly connected to the clamping frame, and one side of the rack is meshed with a gear.

[0010] Preferably, four support plates are fixedly connected to the surface of one end of the workbench away from the laser welding machine.

[0011] Preferably, the vent holes are arranged on the upper part of the activated carbon.

[0012] Preferably, the pressure head is arranged above the clamping frame.

[0013] Preferably, the gear is rotatably connected to one end surface of the workbench.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the triangular structure of the pressure head increases the contact area with the pole ear, improves the flattening area of ​​the pole ear, reduces false welding, and increases the stability of the welding pressure head.

[0016] 2. In the utility model, through the setting of the vacuum pump and the purification box, the vacuum pump, the first pipe and the second pipe are used to absorb the welding smoke into the purification box, and then the purification liquid can be used to absorb the harmful gas in the welding smoke, and the activated carbon is adsorbed again for secondary purification. The filter plate can allow the treated gas to pass through and leave the harmful gas. This setting can treat the harmful gas in the welding smoke and reduce the possibility of gas pollution.

[0017] 3. In the utility model, through the setting of the clamping assembly, the electric push rod drives a rack to move on the guide rail, and the rack is meshed with the gear, so the gear can rotate, and the other rack is meshed with the gear, so the two racks can move parallel to each other, so that the clamping frame can play a clamping effect. This setting can clamp the lower part of the battery, avoid the shaking of the battery, and improve the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural diagram of a soft-pack welding pressure head proposed by the utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the assembly of a soft-pack welding pressure head and other components of the utility model;

[0020] Figure 3 This is a front cross-sectional view of a purification box for a soft-package welding pressure head proposed by the utility model;

[0021] Figure 4 The present invention is a three-dimensional structural diagram of a clamping assembly of a soft-pack welding pressure head.

[0022] Legend:

[0023] 1. Workbench; 2. Support plate; 3. Laser welding machine; 4. Connector; 5. Slide plate; 6. Pressure head; 7. First pipeline; 8. Vacuum pump; 9. Second pipeline; 10. Purification box; 11. Third pipeline; 12. Purification liquid; 13. Partition; 14. Air vent; 15. Filter plate; 16. Activated carbon; 17. Through groove; 18. Electric push rod; 19. Guide rail; 20. Mounting plate; 21. Rack; 22. Gear; 23. Clamping frame; 24. Countersunk hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the specification of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0025] Reference Figure 1 The utility model provides an embodiment: a soft package welding pressure head, including a pressure head 6, the pressure head 6 is a triangular structure, a through slot 17 is provided in the middle of the pressure head 6, the through slot 17 runs through the entire pressure head 6, and two countersunk holes 24 are provided on the left and right sides of the surface of one end of the pressure head 6 near the through slot 17. The pressure head 6 increases the contact area with the tab, increases the tab flattening area, and reduces the false welding; and the new triangular structure adopted by the pressure head 6 increases the stability of the welding pressure head.

[0026] Reference Figure 1 The countersunk hole 24 extends from the top to the middle of the pressure head 6, and the countersunk hole 24 is a cylindrical countersunk hole. The countersunk hole 24 can reduce the stress concentration on the pressure head 6 and improve the durability of the pressure head 6.

[0027] Reference Figure 2 , Figure 3 The pressure head 6 is fixedly connected to one end surface of the connecting member 4, the connecting member 4 is fixedly connected to one end surface of the slide plate 5 by bolts, the slide plate 5 is slidably connected to one end surface of the laser welding machine 3, the laser welding machine 3 is arranged on the workbench 1, the first pipeline 7 is arranged on the left side of the pressure head 6, the other end of the first pipeline 7 is fixedly connected to the suction end of the vacuum pump 8, the exhaust hole of the vacuum pump 8 is fixedly connected to the second pipeline 9, the other end of the second pipeline 9 is fixedly connected to the air inlet of the purification box 10, the interior of the purification box 10 is fixedly connected to the partition 13, the upper part of the partition 13 is provided with a vent hole 14, the left side of the partition 13 is provided with a purification liquid 12, the upper right part of the partition 13 is provided with activated carbon 16, the middle part of the right side of the partition 13 is provided with a filter plate 15, the end of the purification box 10 away from the second pipeline 9 is fixedly connected to the third pipeline 11, and a clamping component is arranged in the middle of one end surface of the workbench 1. The purification liquid 12 can be made of one of ammonia water or urea solution. When welding, welding smoke will be generated at the pressure head 6. The welding smoke can be absorbed into the purification box 10 by using the vacuum pump 8, the first pipeline 7 and the second pipeline 9. The purification liquid 12 can be used to absorb the harmful gases in the welding smoke, and the activated carbon 16 adsorbs them again for secondary purification. The filter plate 15 can allow the treated gas to pass through and leave the harmful gas. This setting can treat the harmful gas in the welding smoke and reduce the possibility of gas pollution.

[0028] Reference Figure 1 , Figure 4 The clamping assembly includes an electric push rod 18, a guide rail 19 and a clamping frame 23. The electric push rod 18 is fixedly connected to the middle of one end surface of the workbench 1. The one end surface of the workbench 1 is fixedly connected to two guide rails 19. One end surface of the guide rail 19 is slidably connected to the mounting plate 20. The output end of the electric push rod 18 is fixedly connected to a mounting plate 20. The end surface of the mounting plate 20 away from the guide rail 19 is fixedly connected to a rack 21. The other end of the rack 21 is fixedly connected to the clamping frame 23. One side of the rack 21 is meshed with a gear 22. The electric push rod 18 drives a rack 21 to move on the guide rail 19. Therefore, the rack 21 meshes with the gear 22, so the gear 22 can rotate. Because the other rack 21 meshes with the gear 22, the two racks 21 can move parallel to each other, so that the clamping frame 23 can play a clamping effect. When the pressure head 6 presses down the pole ear, the battery will shake slightly, and the welding effect will be reduced. This setting can clamp the lower part of the battery to avoid the shaking of the battery and improve the welding effect.

[0029] Reference Figure 2 Four support plates 2 are fixedly connected to the surface of one end of the workbench 1 away from the laser welding machine 3 .

[0030] Reference Figure 3 The vent hole 14 is arranged on the upper part of the activated carbon 16. This arrangement can ensure that the gas passes through the purified liquid 12 and then enters the activated carbon 16.

[0031] Reference Figure 1 , Figure 2 , the pressure head 6 is arranged above the clamping frame 23. This arrangement can ensure that the pressure head is at the battery pole ear.

[0032] Reference Figure 2 The gear 22 is rotatably connected to one end surface of the workbench 1.

[0033] Working principle: put the battery in the middle of the workbench 1, start the electric push rod 18, the electric push rod 18 drives a rack 21 to move on the guide rail 19, so the rack 21 is meshed with the gear 22, so the gear 22 can rotate, and the other rack 21 is meshed with the gear 22, so the two racks 21 can move parallel to each other, so that the clamping frame 23 can play a clamping effect; when welding, start the vacuum pump 8 again, and use the vacuum pump 8, the first pipeline 7 and the second pipeline 9 to absorb the welding smoke into the purification box 10, and then use the purification liquid 12 to absorb the harmful gas in the welding smoke, and the activated carbon 16 adsorbs it again for secondary purification. The filter plate 15 can allow the treated gas to pass through, leaving the harmful gas and discharging the purified gas.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A soft pack welding pressure head, comprising a pressure head (6), characterized in that: The pressure head (6) is a triangular structure, a through groove (17) is provided in the middle of the pressure head (6), the through groove (17) runs through the entire pressure head (6), and two countersunk holes (24) are provided on the left and right sides of the surface of one end of the pressure head (6) close to the through groove (17).

2. The soft package welding pressure head according to claim 1, characterized in that: The countersunk hole (24) extends from the top to the middle of the pressure head (6), and the countersunk hole (24) is a cylindrical countersunk hole.

3. The soft package welding pressure head according to claim 1, characterized in that: The pressure head (6) is fixedly connected to one end surface of the connecting member (4), the connecting member (4) is fixedly connected to one end surface of the slide plate (5) by means of bolts, the slide plate (5) is slidably connected to one end surface of the laser welding machine (3), the laser welding machine (3) is arranged on the workbench (1), a first pipeline (7) is arranged on the left side of the pressure head (6), the other end of the first pipeline (7) is fixedly connected to the suction end of the vacuum pump (8), the exhaust hole of the vacuum pump (8) is fixedly connected to the second pipeline (9), the other end of the second pipeline (9) is fixedly connected to the exhaust hole of the vacuum pump (8), The end is fixedly connected to the air inlet of the purification box (10), the interior of the purification box (10) is fixedly connected to a partition (13), an air vent (14) is provided on the upper part of the partition (13), a purification liquid (12) is arranged on the left side of the partition (13), activated carbon (16) is arranged on the upper right side of the partition (13), a filter plate (15) is arranged in the middle of the right side of the partition (13), one end of the purification box (10) away from the second pipeline (9) is fixedly connected to the third pipeline (11), and a clamping component is arranged in the middle of one end surface of the workbench (1).

4. The soft package welding pressure head according to claim 3, characterized in that: The clamping assembly comprises an electric push rod (18), a guide rail (19) and a clamping frame (23); the electric push rod (18) is fixedly connected to the middle of one end surface of the workbench (1); one end surface of the workbench (1) is fixedly connected to two guide rails (19); one end surface of the guide rail (19) is slidably connected to a mounting plate (20); the output end of the electric push rod (18) is fixedly connected to one mounting plate (20); one end surface of the mounting plate (20) away from the guide rail (19) is fixedly connected to a rack (21); the other end of the rack (21) is fixedly connected to the clamping frame (23); one side of the rack (21) is meshedly connected to a gear (22).

5. The soft package welding pressure head according to claim 3, characterized in that: Four support plates (2) are fixedly connected to the surface of one end of the workbench (1) away from the laser welding machine (3).

6. The soft package welding pressure head according to claim 3, characterized in that: The vent hole (14) is arranged on the upper part of the activated carbon (16).

7. The soft package welding pressure head according to claim 1, characterized in that: The pressure head (6) is arranged above the clamping frame (23).

8. The soft package welding pressure head according to claim 4, characterized in that: The gear (22) is rotatably connected to one end surface of the workbench (1).

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