Lithium battery positive and negative electrode bus bar welding device

Abstract

The utility model belongs to the technical field of bus bar processing, and particularly relates to a lithium battery positive and negative electrode bus bar welding device which comprises a welding table. The top of the welding table is fixedly connected with a pair of first fixing plates. The side wall of the first fixing plate is fixedly connected with a first electric push rod. The end part of the first electric push rod is fixedly connected with a second fixed plate; a plurality of first spring rods are slidably connected to the middle of the second fixing plate. The top of the welding table is fixedly connected with a fixing frame. The side wall of the fixing frame is fixedly connected with a second electric push rod. The end part of the second electric push rod is fixedly connected with a connecting block; a welding gun is fixedly connected to the bottom of the connecting block; in the step, a pair of first electric push rods are arranged to drive a second fixing plate and a first spring rod to clamp and fix the lithium battery from the side surface of the lithium battery, and when the sizes of the lithium batteries are different, the stretching movement distances generated when the end part of the first spring rod is in contact with the side surface of the lithium battery are different; and at the moment, the lithium batteries with different sizes can be clamped and fixed, so that the clamping and fixing applicability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of busbar processing, in particular to a welding device for positive and negative busbars of a lithium battery. Background Art

[0002] Lithium battery is a clean and efficient energy source. Its composition may include positive electrode, negative electrode, separator and electrolyte. In the production process of lithium battery, it is necessary to weld busbars on the positive and negative electrodes. At this time, a lithium battery positive and negative busbar welding device is required for welding.

[0003] The existing positive and negative busbar welding devices for lithium batteries usually adopt laser welding. During welding, the lithium battery is usually fixed on a welding table and then the busbar is connected to the positive or negative ear of the lithium battery, and then the busbar and the ear are welded together through a laser welding head. During long-term use and observation, it is found that during welding, the existing positive and negative busbar welding devices for lithium batteries usually fix the lithium battery on the welding table through a fixing seat, and the size of the fixing seat usually corresponds to the size of the lithium battery. There is a problem of frequently replacing the corresponding fixing seat when welding lithium batteries of different sizes.

[0004] To this end, the utility model provides a lithium battery positive and negative busbar welding device. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the problems raised in the background technology, a lithium battery positive and negative busbar welding device is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a lithium battery positive and negative busbar welding device described in the utility model comprises a welding platform; a pair of first fixing plates are fixedly connected to the top of the welding platform; a first electric push rod is fixedly connected to the side wall of the first fixing plate; the end of the first electric push rod is fixedly connected to the second fixing plate; a plurality of first spring rods are slidably connected to the middle of the second fixing plate; a fixing frame is fixedly connected to the top of the welding platform; a second electric push rod is fixedly connected to the side wall of the fixing frame; the end of the second electric push rod is fixedly connected to a connecting block; and a welding gun is fixedly connected to the bottom of the connecting block; in this step, a pair of first electric push rods are arranged to drive the second fixing plate and the first spring rod to clamp and fix the lithium battery from the side thereof. When the size of the lithium battery is different, the stretching movement distance generated when the end of the first spring rod contacts the side of the lithium battery will also be different. At this time, lithium batteries of different sizes can be clamped and fixed to improve the applicability of clamping and fixing.

[0007] Preferably, a pair of first fixing rings are fixedly connected to the side walls of the connecting block; a second spring rod is slidably connected to the inner side wall of the first fixing ring; a second fixing ring is fixedly connected to the end of the second spring rod; in this step, by arranging the second spring rod to connect the second fixing ring and bringing the second fixing ring closer to the bus bar, the bus bar can be pressed on the top of the lithium battery during welding to reduce the position movement of the bus bar during welding, resulting in loose welding or errors in the welding position, so as to improve the stability of welding.

[0008] Preferably, an air pump is fixedly connected to the side wall of the fixing frame; a hose is connected to the side wall of the air pump; an air intake pipe is connected to the end of the hose; the air intake pipe is fixedly connected to the side wall of the connecting block; a plurality of air intake holes are provided at the bottom of the air intake pipe; the side wall of the air pump is connected to a purification box; in this step, by arranging an air pump to connect the air intake pipe and the purification box, the smoke generated during welding can be sucked into the purification box for purification, so as to reduce the situation where the smoke is dispersed to the surroundings and causes pollution. At the same time, when the airflow flows through the welding position, the battery can be cooled to reduce the situation where the high welding temperature affects the battery performance.

[0009] Preferably, a plurality of collecting holes are provided in the middle of the soldering station; a collecting box is fixedly connected to the bottom of the soldering station; a pull-out box is placed on the inner wall of the collecting box; the pull-out box and the collecting box are slidably matched; in this step, the collecting holes, the collecting box and the pull-out box are provided to collect part of the welding slag generated during welding, thereby reducing the situation where the welding slag remains on the top of the soldering station and causes scratches on the battery. At the same time, the pull-out box can be extracted and replaced to facilitate the removal of the collected welding slag, thereby improving the convenience of welding collection.

[0010] Preferably, a baffle is fixedly connected to the top of the welding platform; and thermal insulation cotton is fixedly connected to the side wall of the baffle. In this step, the baffle and the thermal insulation cotton are provided to block the welding slag scattered around during welding, thereby reducing the pollution caused by the welding slag splashing around. At the same time, the thermal insulation cotton can reduce the damage caused by the contact between the high-temperature welding slag and the baffle.

[0011] Preferably, a plurality of bristles are fixedly connected to the inner side wall of the second fixing ring; the plurality of bristles are evenly distributed on the inner side wall of the second fixing ring; in this step, the bristles are arranged to clean the surface of the welding gun when the second fixing ring moves up and down, so as to reduce the situation where welding slag generated after welding remains on the surface of the welding gun and affects the welding performance.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The utility model discloses a lithium battery positive and negative busbar welding device, which drives a second fixing plate and a first spring rod to clamp and fix the lithium battery from the side thereof by setting a pair of first electric push rods. When the size of the lithium battery is different, the stretching movement distance generated when the end of the first spring rod contacts the side of the lithium battery will also be different. At this time, lithium batteries of different sizes can be clamped and fixed to improve the applicability of clamping and fixing.

[0014] 2. The utility model describes a lithium battery positive and negative busbar welding device, which, by providing a second spring rod to connect the second fixing ring and bring the second fixing ring closer to the busbar, can press the busbar on the top of the lithium battery during welding, so as to reduce the position movement of the busbar during welding, resulting in loose welding or errors in the welding position, thereby improving the stability of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a stereogram in the utility model;

[0017] Figure 2 It is a schematic diagram of the cooperation structure between the second fixing plate and the suction cup in the utility model;

[0018] Figure 3 This is a schematic diagram of the cooperation structure between the second spring rod, the air intake pipe and the bristles in the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the collection box in the utility model;

[0020] Legend:

[0021] 1. Soldering table; 11. First fixed plate; 12. First electric push rod; 13. Second fixed plate; 14. First spring rod; 15. Fixed frame; 16. Second electric push rod; 17. Connecting block; 18. Welding gun; 2. First fixed ring; 21. Second spring rod; 22. Second fixed ring; 3. Air pump; 31. Hose; 32. Inlet pipe; 33. Inlet hole; 34. Purification box; 4. Collecting hole; 41. Collecting box; 42. Pull-out box; 5. Baffle; 51. Insulation cotton; 6. Brush; 7. Suction cup. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments 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.

[0023] Specific examples are given below.

[0024] like Figures 1 to 3 As shown, a lithium battery positive and negative busbar welding device described in an embodiment of the utility model comprises a welding station 1; a pair of first fixing plates 11 are fixedly connected to the top of the welding station 1; a first electric push rod 12 is fixedly connected to the side wall of the first fixing plate 11; a second fixing plate 13 is fixedly connected to the end of the first electric push rod 12; a plurality of first spring rods 14 are slidably connected to the middle of the second fixing plate 13; a fixing frame 15 is fixedly connected to the top of the welding station 1; a second electric push rod 16 is fixedly connected to the side wall of the fixing frame 15; a connecting block 17 is fixedly connected to the end of the second electric push rod 16; a welding gun 18 is fixedly connected to the bottom of the connecting block 17; during operation, when welding the positive and negative busbars of the lithium battery, the lithium battery is placed vertically in the center of the top of the welding station 1 and then the first electric push rods 12 on both sides are started, and the first electric push rods 1 2 can drive the second fixing plate 13 and the first spring rod 14 to move toward the lithium battery in the middle of the welding platform 1. When the end of the first spring rod 14 contacts the side of the lithium battery, it will be stretched and moved. At this time, the rebound force generated by the first spring rod 14 will clamp and fix the lithium battery. Then, the busbar is placed on the positive or negative electrode of the battery and the second electric push rod 16 is started to drive the connecting block 17 and the welding gun 18 to move toward the busbar to weld it. In this step, a pair of first electric push rods 12 are set to drive the second fixing plate 13 and the first spring rod 14 to clamp and fix the lithium battery from the side. When the size of the lithium battery is different, the stretching movement distance generated when the end of the first spring rod 14 contacts the side of the lithium battery will also be different. At this time, lithium batteries of different sizes can be clamped and fixed to improve the applicability of clamping and fixing.

[0025] like Figure 1 and Figure 3 As shown, a pair of first fixing rings 2 are fixedly connected to the side wall of the connecting block 17; a second spring rod 21 is slidably connected to the inner side wall of the first fixing ring 2; a second fixing ring 22 is fixedly connected to the end of the second spring rod 21; during operation, when the second electric push rod 16 drives the connecting block 17 and the welding gun 18 to move toward the busbar, the second fixing ring 22 is closer to the surface of the busbar, and when the second fixing ring 22 contacts the busbar, the second spring rod 21 is stretched and drives the second fixing ring 22 to move upward. At this time, the rebound force generated by the second spring rod 21 can press the busbar on the top of the lithium battery, and then the welding gun 18 continues to move downward and passes through the second fixing ring 22 to weld the busbar. In this step, by setting the second spring rod 21 to connect the second fixing ring 22 and bring the second fixing ring 22 closer to the busbar, the busbar can be pressed on the top of the lithium battery during welding to reduce the position movement of the busbar during welding, resulting in loose welding or errors in the welding position, so as to improve the stability of welding.

[0026] like Figure 1 and Figure 3 As shown, the side wall of the fixing frame 15 is fixedly connected to an air pump 3; the side wall of the air pump 3 is connected to a hose 31; the end of the hose 31 is connected to an air inlet pipe 32; the air inlet pipe 32 is fixedly connected to the side wall of the connecting block 17; a plurality of air inlet holes 33 are opened at the bottom of the air inlet pipe 32; the side wall of the air pump 3 is connected to a purification box 34; during operation, more smoke and dust will be generated during welding. At this time, the air pump 3 can be started to drive the air flow to enter the air inlet pipe 32 from the air inlet hole 33, and then enter the air pump 3 through the hose 31 and finally flow into the purification box 34. The purification material placed in the purification box 34 can suck the generated smoke and dust into the purification box 34 for filtration and purification. In this step, the smoke and dust generated during welding can be sucked into the purification box 34 for purification by setting the air pump 3 to connect the air inlet pipe 32 and the purification box 34, so as to reduce the pollution caused by the smoke and dust drifting around. At the same time, when the air flow flows through the welding position, the battery can be cooled to reduce the situation where the high welding temperature affects the battery performance.

[0027] like Figure 4 As shown, a plurality of collecting holes 4 are opened in the middle of the soldering station 1; a collecting box 41 is fixedly connected to the bottom of the soldering station 1; a pull-out box 42 is placed on the inner wall of the collecting box 41; the pull-out box 42 and the collecting box 41 are in sliding cooperation; during operation, a large amount of welding slag will be generated and fall onto the surface of the soldering station 1 during welding, and part of the welding slag will fall from the plurality of collecting holes 4 on the top of the soldering station 1 into the pull-out box 42 below, at which time the pull-out box 42 can collect the welding slag that enters, and when the collection is completed, the pull-out box 42 is pulled out from the collecting box 41, the welding slag inside is poured out, and then the pull-out box 42 is put back into the collecting box 41. In this step, part of the welding slag generated during welding can be collected by setting the collecting holes 4, the collecting box 41 and the pull-out box 42, so as to reduce the situation where the welding slag remains on the top of the soldering station 1 and scratches the battery. At the same time, the pull-out box 42 can be extracted and put back to facilitate the removal of the collected welding slag, thereby improving the convenience of welding collection.

[0028] like Figure 1 As shown, a baffle plate 5 is fixedly connected to the top of the welding platform 1; a heat-insulating cotton 51 is fixedly connected to the side wall of the baffle plate 5; during operation, the welding slag generated during welding will contact the baffle plate 5 and the heat-insulating cotton 51 when it scatters around. At this time, the splashed welding slag can be blocked and made to fall back to the surface of the welding platform 1. In this step, the baffle plate 5 and the heat-insulating cotton 51 are set to block the welding slag scattered around during welding, thereby reducing the pollution caused by the splashing of welding slag around. At the same time, the heat-insulating cotton 51 can reduce the damage caused by the contact between the high-temperature welding slag and the baffle plate 5.

[0029] like Figure 3As shown, a plurality of bristles 6 are fixedly connected to the inner wall of the second fixing ring 22; the plurality of bristles 6 are evenly distributed on the inner wall of the second fixing ring 22; during operation, when the second fixing ring 22 presses and fixes the bus bar, the welding gun 18 will pass through the second fixing ring 22 to weld the bus bar, and when the welding is completed, the second electric push rod 16 drives the welding gun 18 to move upward. At this time, the second spring rod 21 rebounds and drives the second fixing ring 22 to move downward. At this time, the plurality of bristles 6 in the second fixing ring 22 contact with the welding gun 18 to clean the surface of the welding gun 18. In this step, the bristles 6 are arranged to clean the surface of the welding gun 18 when the second fixing ring 22 moves up and down, so as to reduce the situation where the welding slag generated after welding remains on the surface of the welding gun 18 and affects the welding performance.

[0030] like Figure 2 As shown, a suction cup 7 is fixedly connected to the end of the first spring rod 14; during operation, when the first spring rod 14 clamps and fixes the lithium battery from the side, the suction cup 7 will contact the side of the lithium battery and be adsorbed on the side of the lithium battery to make the connection between the first spring rod 14 and the lithium battery tighter. In this step, the suction cup 7 is arranged to be adsorbed on the surface of the lithium battery when the first spring rod 14 clamps and fixes the lithium battery, so as to increase the connection tightness between the first spring rod 14 and the lithium battery and improve the effect of the first spring rod 14 on fixing the lithium battery.

[0031] Working principle: During operation, when welding the positive and negative busbars of a lithium battery, place the lithium battery vertically in the center of the top of the welding station 1 and then start the first electric push rods 12 on both sides. The first electric push rod 12 can drive the second fixing plate 13 and the first spring rod 14 to move toward the lithium battery in the middle of the welding station 1. When the end of the first spring rod 14 contacts the side of the lithium battery, it will be stretched and moved. At this time, the rebound force generated by the first spring rod 14 will clamp and fix the lithium battery. Then place the busbar on the positive or negative electrode of the battery and start the second electric push rod 16 to drive the connecting block 17 and the welding gun 18 to move toward the busbar to weld it. Then, when the second electric push rod 16 drives the connecting block 17 and the welding gun 18 to move toward the busbar, the second fixing ring 22 is closer to the surface of the busbar. When the second fixing ring 22 contacts the busbar, the second spring rod 21 is stretched to drive the second fixing ring 22 to move upward. At this time, the rebound force generated by the second spring rod 21 can press the busbar on the top of the lithium battery. Then the welding gun 18 continues to move downward and passes through the second fixing ring 22 to weld the busbar. A lot of smoke and dust will be generated during welding. At this time, the air pump 3 can be started to drive the airflow from the air inlet hole 33 into the air inlet pipe 32, and then enter the air pump 3 through the hose 31 Finally, it flows into the purification box 34. The purification material placed in the purification box 34 can absorb the generated smoke and dust into the purification box 34 for filtration and purification. During welding, more welding slag will fall on the surface of the welding platform 1. Part of the welding slag will fall from the multiple collection holes 4 on the top of the welding platform 1 to the pull-out box 42 below. At this time, the pull-out box 42 can collect the welding slag that enters. When the collection is completed, the pull-out box 42 is pulled out from the collection box 41, the welding slag inside it is poured out, and then the pull-out box 42 is put back into the collection box 41. The welding slag generated during welding will contact the baffle 5 and the heat insulation cotton 51 when it scatters around. At this time, the splashing welding slag can be blocked The welding slag falls back to the surface of the welding platform 1. When the second fixing ring 22 presses and fixes the busbar, the welding gun 18 will pass through the second fixing ring 22 to weld the busbar. After welding, the second electric push rod 16 drives the welding gun 18 to move upward. At this time, the second spring rod 21 rebounds and drives the second fixing ring 22 to move downward. At this time, the multiple bristles 6 in the second fixing ring 22 contact with the welding gun 18 to clean the surface of the welding gun 18. When the first spring rod 14 clamps and fixes the lithium battery from the side, the suction cup 7 will contact the side of the lithium battery and be adsorbed on the side of the lithium battery to make the connection between the first spring rod 14 and the lithium battery tighter.

[0032] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A lithium battery positive and negative busbar welding device, comprising a welding station (1); characterized in that: A pair of first fixing plates (11) are fixedly connected to the top of the welding platform (1); a first electric push rod (12) is fixedly connected to the side wall of the first fixing plate (11); a second fixing plate (13) is fixedly connected to the end of the first electric push rod (12); a plurality of first spring rods (14) are slidably connected to the middle of the second fixing plate (13); a fixing frame (15) is fixedly connected to the top of the welding platform (1); a second electric push rod (16) is fixedly connected to the side wall of the fixing frame (15); a connecting block (17) is fixedly connected to the end of the second electric push rod (16); and a welding gun (18) is fixedly connected to the bottom of the connecting block (17).

2. A lithium battery positive and negative busbar welding device according to claim 1, characterized in that: A pair of first fixing rings (2) are fixedly connected to the side walls of the connection block (17); a second spring rod (21) is slidably connected to the inner side walls of the first fixing ring (2); and a second fixing ring (22) is fixedly connected to the end of the second spring rod (21).

3. A lithium battery positive and negative busbar welding device according to claim 2, characterized in that: The side wall of the fixing frame (15) is fixedly connected to an air pump (3); the side wall of the air pump (3) is connected to a hose (31); the end of the hose (31) is connected to an air intake pipe (32); the air intake pipe (32) is fixedly connected to the side wall of the connecting block (17); a plurality of air intake holes (33) are formed at the bottom of the air intake pipe (32); and the side wall of the air pump (3) is connected to a purification box (34).

4. A lithium battery positive and negative busbar welding device according to claim 3, characterized in that: A plurality of collecting holes (4) are provided in the middle of the soldering platform (1); a collecting box (41) is fixedly connected to the bottom of the soldering platform (1); a pull-out box (42) is placed on the inner wall of the collecting box (41); the pull-out box (42) and the collecting box (41) are in sliding fit.

5. A lithium battery positive and negative busbar welding device according to claim 4, characterized in that: A baffle (5) is fixedly connected to the top of the welding platform (1); and a heat insulation cotton (51) is fixedly connected to the side wall of the baffle (5).

6. A lithium battery positive and negative busbar welding device according to claim 5, characterized in that: A plurality of bristles (6) are fixedly connected to the inner side wall of the second fixing ring (22); the plurality of bristles (6) are evenly distributed on the inner side wall of the second fixing ring (22).

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