Lithium battery series welding equipment

Abstract

The invention discloses lithium battery series connection welding equipment, and belongs to the technical field of lithium battery welding, the lithium battery series connection welding equipment comprises a switching device, the switching device is used for driving a lithium battery to move, two feeding devices and a welding device are arranged on the switching device, the feeding devices are used for placing the lithium battery on the switching device, and the welding device is used for welding the lithium battery. The welding device is used for welding the lithium batteries in series. The feeding device provided by the invention is divided into two cavities which are respectively provided with the lithium batteries, the positive electrodes of the lithium batteries are stacked in opposite directions, and during feeding, the lithium batteries in the two cavities fall onto the lithium battery lower seat at the same time, so that the positive electrodes and the negative electrodes of every two adjacent lithium batteries are oppositely placed, and the lithium batteries are positioned through a limiting plate, so that the welding is convenient; by means of the switching device, when the welding device is used for welding the lithium battery pack, the to-be-welded lithium battery can be fed to the other lower butt joint mechanism at the same time, feeding of next welding is carried out while welding is achieved, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery welding, and in particular to a lithium battery series welding device. Background Art

[0002] Lithium battery is a type of battery that uses lithium as the main chemical element. It is widely used in various electronic devices and electric vehicles due to its high energy density, long life and low self-discharge rate. Lithium battery series welding is to connect multiple lithium battery cells to increase the total voltage of the battery pack. The positive and negative electrodes of the battery are usually connected together by welding metal strips or using welding sheets. Proper welding and connection can improve the performance and safety of the battery pack. The welding of lithium batteries is usually in the form of resistance welding, and the welding sheets are usually nickel sheets. The lithium battery series welding in the prior art is mainly done by manually placing the lithium battery in place, and then welding the lithium battery to the nickel sheet by manual or automatic welding machine. The switching of the positive and negative electrodes of the lithium battery is time-consuming and labor-intensive. At the same time, the welding positioning accuracy is insufficient and the degree of automation is low. Summary of the invention

[0003] In response to the above technical problems, the technical solution adopted by the present invention is: a lithium battery series welding device, including a switching device, the switching device includes a main frame, the switching device is used to drive the lithium battery to move, the switching device is provided with two feeding devices and a welding device, the feeding device includes a feeding rack, the feeding rack is fixedly installed on the main frame, the feeding device is used to place the lithium battery on the switching device, the welding device includes a vertical frame, the vertical frame is fixedly installed on the main frame, and the welding device is used to weld the lithium batteries in series.

[0004] Furthermore, the switching device includes a bottom electric cylinder fixedly mounted on the main frame, a slide rail fixedly mounted on the main frame, and two sets of limit plates fixedly mounted on the main frame.

[0005] Furthermore, two lower docking mechanisms are provided on the slide rail, and the lower docking mechanism includes a sliding frame slidably installed on the slide rail, the sliding frame at the right end is fixedly installed on the top of the bottom electric cylinder, the two sliding frames are fixedly installed, a screw motor is fixedly installed on the sliding frame, a screw is rotatably installed on the sliding frame, a sliding rod is fixedly installed on the sliding frame, a lithium battery lower seat is slidably installed on the sliding rod, the lithium battery lower seat and the screw form a threaded transmission, and a number of lithium batteries are placed on the lithium battery lower seat through a feeding device, and the positive poles of two adjacent lithium batteries are facing opposite directions.

[0006] Whenever two lithium batteries with opposite positive poles fall from the feed rack, that is, when a group of lithium batteries arrives at the lithium battery lower seat, the screw motor rotates to drive the screw to rotate, thereby driving the lithium battery lower seat to slide two positions along the slide rod, so that all the lithium batteries are placed in the lithium battery lower seat, and the two sliding racks are driven to slide along the slide rail by the extension and contraction of the bottom electric cylinder. When the lithium batteries on one lithium battery lower seat are being welded in series, the other lithium battery lower seat can be loaded, saving work time.

[0007] Furthermore, the feeding device includes a feeding box fixedly mounted on the feeding frame, a feeding motor fixedly mounted on the feeding box, and a motor wheel fixedly mounted on the motor shaft of the feeding motor.

[0008] Furthermore, two thumbwheel mechanisms are provided on the feed box, and the thumbwheel mechanisms include a dividing wheel rotatably mounted on the feed box, a dividing gear is fixedly mounted on the dividing wheel, a transfer gear is rotatably mounted on the feed box, the dividing gear is meshed with the transfer gear, and the two transfer gears are meshed with each other, a lower transmission wheel is fixedly mounted on the left dividing wheel, a motor transmission belt is wound around the lower transmission wheel and the motor wheel, a groove with the same shape as the lithium battery is provided on the dividing wheel, and the two dividing wheels rotate in opposite directions. The feed box is divided into two spaces, in which lithium batteries are stacked respectively, and the positive and negative poles of the lithium batteries stacked on both sides are facing in opposite directions.

[0009] The rotation of the feed motor drives the motor wheel to rotate, which drives the lower transmission wheel to rotate through the motor transmission belt, thereby driving the dividing wheel to rotate, and the two dividing wheels are rotated synchronously through the dividing gear and the transfer gear, and the two dividing wheels rotate in opposite directions, the left dividing wheel rotates clockwise, and the right dividing wheel rotates counterclockwise, and the lithium batteries in the feed box are delivered one by one through the grooves in the dividing wheel. The two dividing wheels simultaneously place two lithium batteries with opposite positive poles into the lithium battery lower seat located under the feed rack, and the lithium batteries are positioned by the limit plate.

[0010] Furthermore, the welding device includes an electric cylinder frame fixedly mounted on the vertical frame, a top electric cylinder fixedly mounted on the electric cylinder frame, a lower pressure frame fixedly mounted on the top of the top electric cylinder, an upper guide column fixedly mounted on the lower pressure frame, the upper guide column and the electric cylinder frame are slidably mounted, and an upper seat is fixedly mounted on the lower pressure frame.

[0011] Furthermore, two resistance mechanisms are provided on the lower pressure frame, and the resistance mechanism includes an inner push electric cylinder fixedly installed on the lower pressure frame, an inner push plate fixedly installed on the top of the inner push electric cylinder, an inner push sliding column fixedly installed on the inner push plate, the inner push sliding column is slidably installed with the lower pressure frame, and a number of welding resistors are provided on the inner push plate.

[0012] Furthermore, two lifting mechanisms are provided on the main frame, and the lifting mechanism includes a base fixedly installed on the main frame, a bottom sliding column fixedly installed on the base, a pressing frame slidably installed on the bottom sliding column, a groove frame fixedly installed on the pressing frame, a connecting frame fixedly installed on the base, an outer eccentric turntable rotatably installed on the connecting frame, an inner eccentric wheel fixedly installed on the outer eccentric turntable, an eccentric column fixedly installed on the outer eccentric turntable, the eccentric column slides in the long groove of the groove frame, and an eccentric rotating rod is eccentrically rotatably installed on the inner eccentric wheel.

[0013] Furthermore, a nickel sheet mechanism is provided on the base, and the nickel sheet mechanism includes a fixed cylinder fixedly installed on the base, an inner sliding column slidably installed in the fixed cylinder, an ascending frame fixedly installed on the inner sliding column, a nickel sheet frame fixedly installed on the ascending frame, a number of nickel sheets are placed in the nickel sheet frame, an upper sliding column fixedly installed on the ascending frame, the upper sliding column and the fixed cylinder are slidably installed, and a sliding column spring is provided between the upper sliding column and the fixed cylinder.

[0014] When the lithium battery lower seat brings the lithium battery to the bottom of the upper seat, the electric cylinder frame extends to drive the lower pressure frame to descend, and drive the upper seat to descend. After the lower pressure frame contacts the pressure frame, the lower pressure frame drives the pressure frame to descend along the bottom sliding column, thereby driving the slot frame to descend, thereby driving the outer eccentric turntable to rotate through the eccentric column, thereby driving the inner eccentric wheel to rotate, thereby driving the eccentric rotating rod to rotate, thereby driving the rising frame and the inner sliding column to rise along the fixed cylinder, the sliding column spring is compressed, thereby driving the nickel sheet frame and the nickel sheet to rise. When the upper seat contacts the lithium battery, the nickel sheet Arriving next to the lithium battery, the inner push electric cylinder then contracts to drive the inner push plate and the inner push slide column to slide inward, driving the welding resistor to contact the nickel sheet, and the nickel sheet is welded to the positive electrode of the lithium battery and the negative electrode of the adjacent lithium battery through the welding resistor to achieve series welding of the lithium batteries. After welding is completed, the inner push electric cylinder extends, and then the electric cylinder frame contracts, and the slide column spring rebounds, so that the lower pressure frame, upper seat, lower pressure frame, and nickel sheet frame return to their initial positions. The welded lithium battery is manually removed, and the nickel sheet to be used next is manually placed in the nickel sheet frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) the feeding device provided in the present invention is divided into two cavities, each of which is equipped with a lithium battery. The positive poles of the lithium batteries are stacked in opposite directions. When feeding, the lithium batteries in the two cavities fall onto the lower seat of the lithium battery at the same time, so that the positive and negative poles of every two adjacent lithium batteries are placed in opposite directions, and the lithium batteries are positioned by a limit plate to facilitate welding; (2) when the upper seat of the welding device provided in the present invention descends, the nickel sheet rack and the nickel sheet are simultaneously driven to rise, so that the nickel sheet is docked with the lithium battery, and the nickel sheet and the lithium battery are welded by a welding resistor to connect the lithium batteries in series, with a high degree of automation; (3) the switching device provided in the present invention enables the welding device to feed the lithium battery to be welded to another lower docking mechanism at the same time when welding the lithium battery group, so that the next welding can be loaded at the same time, thereby improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention (welding state).

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention (state to be welded).

[0018] Figure 3 The switching device structure of the present invention is shown in FIG. Figure 1 .

[0019] Figure 4 The switching device structure of the present invention is shown in FIG. Figure 2 .

[0020] Figure 5 The structure of the feeding device of the present invention is shown in FIG. Figure 1 .

[0021] Figure 6 The structure of the feeding device of the present invention is shown in FIG. Figure 2 .

[0022] Figure 7 The structure of the feeding device of the present invention is shown in FIG. Figure 3 .

[0023] Figure 8 The structure of the welding device of the present invention is shown in FIG. Figure 1 .

[0024] Fig. 9 The structure of the welding device of the present invention is shown in FIG. Figure 2 .

[0025] Fig.10 It is a schematic diagram of the lifting mechanism structure of the present invention.

[0026] Fig.11 It is a structural schematic diagram of the nickel sheet rack of the present invention.

[0027] Figure numbers: 101-main frame; 102-bottom electric cylinder; 103-slide rail; 104-limiting plate; 105-sliding frame; 106-screw motor; 107-screw; 108-slide rod; 109-lithium battery lower seat; 110-lithium battery; 201-feeding frame; 202-feeding box; 203-feeding motor; 204-motor wheel; 205-motor transmission belt; 206-lower transmission wheel; 207-distribution wheel; 208-distribution gear; 209-transfer gear; 301-stand; 302-electric cylinder frame; 303-top electric cylinder; 3 04-lower pressure frame; 305-upper guide column; 306-base; 307-bottom slide column; 308-pressing frame; 309-inner push electric cylinder; 310-inner push plate; 311-inner push slide column; 312-welding resistor; 313-slot frame; 314-external eccentric turntable; 315-eccentric column; 316-connecting frame; 317-inner eccentric wheel; 318-eccentric rotating rod; 319-rising frame; 320-fixing cylinder; 321-inner slide column; 322-upper slide column; 323-slide column spring; 324-nickel sheet frame; 325-nickel sheet; 326-upper seat. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] Example: Reference Figure 1-Figure 11 A lithium battery series welding device includes a switching device, the switching device includes a main frame 101, the switching device is used to drive the lithium battery to move, the switching device is provided with two feeding devices and a welding device, the feeding device includes a feeding frame 201, the feeding frame 201 is fixedly mounted on the main frame 101, the feeding device is used to place the lithium battery on the switching device, the welding device includes a stand 301, the stand 301 is fixedly mounted on the main frame 101, and the welding device is used to weld the lithium batteries in series.

[0030] like Figure 3 , Figure 4 As shown, the switching device includes a bottom electric cylinder 102 fixedly mounted on a main frame 101 , a slide rail 103 fixedly mounted on the main frame 101 , and two sets of limit plates 104 fixedly mounted on the main frame 101 .

[0031] like Figure 3 , Figure 4As shown, two lower docking mechanisms are arranged on the slide rail 103, and the lower docking mechanism includes a sliding frame 105 slidably mounted on the slide rail 103, the sliding frame 105 at the right end is fixedly mounted on the top of the bottom electric cylinder 102, the two sliding frames 105 are fixedly mounted, a screw motor 106 is fixedly mounted on the sliding frame 105, a screw 107 is rotatably mounted on the sliding frame 105, a slide rod 108 is fixedly mounted on the sliding frame 105, a lithium battery lower seat 109 is slidably mounted on the slide rod 108, the lithium battery lower seat 109 and the screw 107 form a threaded transmission, and a plurality of lithium batteries 110 are placed on the lithium battery lower seat 109 through a feeding device, and the positive poles of two adjacent lithium batteries 110 face opposite directions.

[0032] Whenever two lithium batteries 110 with opposite positive poles fall from the feed rack 201, that is, a group of lithium batteries 110 arrive at the lithium battery lower seat 109, the screw motor 106 rotates to drive the screw 107 to rotate, thereby driving the lithium battery lower seat 109 to slide two positions along the slide bar 108, so that all the lithium batteries 110 are placed in the lithium battery lower seat 109, and the two sliding racks 105 are driven to slide along the slide rail 103 by the extension and contraction of the bottom electric cylinder 102. When the lithium batteries 110 on one lithium battery lower seat 109 are being welded in series, the other lithium battery lower seat 109 can be loaded, saving working time.

[0033] like Figure 5-Figure 7 As shown, the feeding device includes a feeding box 202 fixedly mounted on a feeding frame 201 , a feeding motor 203 fixedly mounted on the feeding box 202 , and a motor wheel 204 fixedly mounted on the motor shaft of the feeding motor 203 .

[0034] like Figure 5-Figure 7 As shown, two thumbwheel mechanisms are provided on the feed box 202, and the thumbwheel mechanisms include a dividing wheel 207 rotatably mounted on the feed box 202, a dividing gear 208 is fixedly mounted on the dividing wheel 207, a transfer gear 209 is rotatably mounted on the feed box 202, the dividing gear 208 is meshed with the transfer gear 209, and the two transfer gears 209 are meshed with each other, a lower transmission wheel 206 is fixedly mounted on the left dividing wheel 207, a motor transmission belt 205 is wound around the lower transmission wheel 206 and the motor wheel 204, a groove of the same shape as the lithium battery 110 is provided on the dividing wheel 207, and the two dividing wheels 207 rotate in opposite directions, and the feed box 202 is divided into two spaces, on which lithium batteries 110 are stacked respectively, and the positive and negative poles of the lithium batteries 110 stacked on both sides are facing in opposite directions.

[0035] The rotation of the feed motor 203 drives the motor wheel 204 to rotate, and the motor drive belt 205 drives the lower transmission wheel 206 to rotate, thereby driving the dividing wheel 207 to rotate, and the two dividing wheels 207 are realized by the dividing gear 208 and the transfer gear 209 to rotate synchronously, and the rotation directions of the two dividing wheels 207 are opposite, the left dividing wheel 207 rotates clockwise, and the right dividing wheel 207 rotates counterclockwise, and the lithium batteries 110 in the feed box 202 are delivered one by one through the grooves in the dividing wheels 207, and the two dividing wheels 207 simultaneously place two lithium batteries 110 with opposite positive poles into the lithium battery lower seat 109 located under the feed rack 201, and the lithium batteries 110 are positioned by the limit plate 104.

[0036] like Figure 8-Figure 11 As shown, the welding device includes an electric cylinder frame 302 fixedly mounted on a vertical frame 301, a top electric cylinder 303 fixedly mounted on the electric cylinder frame 302, a lower pressure frame 304 fixedly mounted on the top of the top electric cylinder 303, an upper guide column 305 fixedly mounted on the lower pressure frame 304, the upper guide column 305 is slidably mounted on the electric cylinder frame 302, and an upper seat 326 is fixedly mounted on the lower pressure frame 304.

[0037] like Figure 8-Figure 11 As shown, two resistance mechanisms are arranged on the lower pressure frame 304, and the resistance mechanism includes an inner push electric cylinder 309 fixedly mounted on the lower pressure frame 304, an inner push plate 310 is fixedly mounted on the top of the inner push electric cylinder 309, an inner push slide 311 is fixedly mounted on the inner push plate 310, the inner push slide 311 is slidably mounted with the lower pressure frame 304, and a plurality of welding resistors 312 are arranged on the inner push plate 310.

[0038] like Figure 8-Figure 11 As shown, two lifting mechanisms are provided on the main frame 101, and the lifting mechanisms include a base 306 fixedly mounted on the main frame 101, a bottom sliding column 307 fixedly mounted on the base 306, a pressing frame 308 slidably mounted on the bottom sliding column 307, a groove frame 313 fixedly mounted on the pressing frame 308, a connecting frame 316 fixedly mounted on the base 306, an outer eccentric turntable 314 rotatably mounted on the connecting frame 316, an inner eccentric wheel 317 fixedly mounted on the outer eccentric turntable 314, an eccentric column 315 fixedly mounted on the outer eccentric turntable 314, the eccentric column 315 slides in the long groove of the groove frame 313, and an eccentric rotating rod 318 is eccentrically rotatably mounted on the inner eccentric wheel 317.

[0039] like Figure 8-Figure 11As shown, a nickel sheet mechanism is provided on the base 306, and the nickel sheet mechanism includes a fixed cylinder 320 fixedly mounted on the base 306, an inner sliding column 321 is slidably mounted in the fixed cylinder 320, a rising frame 319 is fixedly mounted on the inner sliding column 321, a nickel sheet frame 324 is fixedly mounted on the rising frame 319, a plurality of nickel sheets 325 are placed in the nickel sheet frame 324, an upper sliding column 322 is fixedly mounted on the rising frame 319, the upper sliding column 322 is slidably mounted with the fixed cylinder 320, and a sliding column spring 323 is provided between the upper sliding column 322 and the fixed cylinder 320.

[0040] When the lithium battery lower seat 109 brings the lithium battery 110 to the bottom of the upper seat 326, the electric cylinder frame 302 extends to drive the lower pressure frame 304 to descend, and drives the upper seat 326 to descend. After the lower pressure frame 304 contacts the pressing frame 308, the lower pressure frame 304 drives the pressing frame 308 to descend along the bottom sliding column 307, thereby driving the groove frame 313 to descend, thereby driving the outer eccentric rotating disk 314 to rotate through the eccentric column 315, thereby driving the inner eccentric wheel 317 to rotate, thereby driving the eccentric rotating rod 318 to rotate, thereby driving the rising frame 319 and the inner sliding column 321 to rise along the fixed cylinder 320, the sliding column spring 323 is compressed, thereby driving the nickel sheet frame 324 and the nickel sheet 325 to rise. When the upper seat 326 contacts the lithium battery 110, , the nickel sheet 325 arrives next to the lithium battery 110, and then the inner push electric cylinder 309 contracts to drive the inner push plate 310 and the inner push slide 311 to slide inward, driving the welding resistor 312 to contact the nickel sheet 325, and the nickel sheet 325 is welded to the positive electrode of the lithium battery 110 and the negative electrode of the adjacent lithium battery 110 through the welding resistor 312, so as to realize the series welding of the lithium battery 110. After the welding is completed, the inner push electric cylinder 309 extends, and then the electric cylinder frame 302 contracts, and the slide spring 323 rebounds, so that the lower pressure frame 304, the upper seat 326, the lower pressure frame 308, and the nickel sheet frame 324 return to the initial position, and the welded lithium battery 110 is manually removed, and the nickel sheet 325 to be used next is manually placed in the nickel sheet frame 324.

[0041] The working principle of a lithium battery series welding device disclosed in the present invention is: the feed motor 203 rotates to drive the motor wheel 204 to rotate, and the motor drive belt 205 drives the lower transmission wheel 206 to rotate, thereby driving the dividing wheel 207 to rotate, and the two dividing wheels 207 are synchronously rotated by the dividing gear 208 and the transfer gear 209, and the rotation directions of the two dividing wheels 207 are opposite, the left dividing wheel 207 rotates clockwise, and the right dividing wheel 207 rotates counterclockwise, and the lithium batteries 110 in the feed box 202 are sent out one by one through the grooves in the dividing wheel 207, and the two dividing wheels 207 simultaneously put two lithium batteries 110 with opposite positive poles into the lithium battery lower seat 109 located below the feed rack 201. Whenever two lithium batteries 110 with opposite positive poles fall from the feed rack 201, that is, a group of lithium batteries 110 arrive at the lithium battery lower seat 109, the screw motor 106 rotates to drive the screw 107 to rotate, thereby driving the lithium battery lower seat 109 to slide two positions along the slide bar 108, so that all the lithium batteries 110 are placed in the lithium battery lower seat 109, and the two sliding racks 105 are driven to slide along the slide rail 103 by the extension and contraction of the bottom electric cylinder 102. When the lithium batteries 110 on one lithium battery lower seat 109 are being welded in series, the other lithium battery lower seat 109 can be loaded, saving working time. When the lithium battery lower seat 109 brings the lithium battery 110 to the bottom of the upper seat 326, the electric cylinder frame 302 extends to drive the lower pressure frame 304 to descend, and drives the upper seat 326 to descend. After the lower pressure frame 304 contacts the pressing frame 308, the lower pressure frame 304 drives the pressing frame 308 to descend along the bottom sliding column 307, thereby driving the groove frame 313 to descend, thereby driving the outer eccentric rotating disk 314 to rotate through the eccentric column 315, thereby driving the inner eccentric wheel 317 to rotate, thereby driving the eccentric rotating rod 318 to rotate, thereby driving the rising frame 319 and the inner sliding column 321 to rise along the fixed cylinder 320, the sliding column spring 323 is compressed, thereby driving the nickel sheet frame 324 and the nickel sheet 325 to rise. When the upper seat 326 contacts the lithium battery 110, , the nickel sheet 325 arrives next to the lithium battery 110, and then the inner push electric cylinder 309 contracts to drive the inner push plate 310 and the inner push slide 311 to slide inward, driving the welding resistor 312 to contact the nickel sheet 325, and the nickel sheet 325 is welded to the positive electrode of the lithium battery 110 and the negative electrode of the adjacent lithium battery 110 through the welding resistor 312, so as to realize the series welding of the lithium battery 110. After the welding is completed, the inner push electric cylinder 309 extends, and then the electric cylinder frame 302 contracts, and the slide spring 323 rebounds, so that the lower pressure frame 304, the upper seat 326, the lower pressure frame 308, and the nickel sheet frame 324 return to the initial position, and the welded lithium battery 110 is manually removed, and the nickel sheet 325 to be used next is manually placed in the nickel sheet frame 324.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium battery series welding device, comprising a switching device, characterized in that: The switching device comprises a main frame (101), the switching device is used to drive the lithium battery to move, the switching device is provided with two feeding devices and a welding device, the feeding device comprises a feeding frame (201), the feeding frame (201) is fixedly mounted on the main frame (101), the feeding device is used to place the lithium battery on the switching device, the welding device comprises a stand (301), the stand (301) is fixedly mounted on the main frame (101), and the welding device is used to perform series welding on the lithium batteries; The switching device comprises a bottom electric cylinder (102) fixedly mounted on a main frame (101), a slide rail (103) fixedly mounted on the main frame (101), and two sets of limit plates (104) fixedly mounted on the main frame (101); The slide rail (103) is provided with two lower docking mechanisms, the lower docking mechanisms comprising a slide frame (105) slidably mounted on the slide rail (103), the slide frame (105) at the right end being fixedly mounted on the top of the bottom electric cylinder (102), the two slide frames (105) being fixedly mounted, a screw motor (106) being fixedly mounted on the slide frame (105), a screw (107) being rotatably mounted on the slide frame (105), a slide rod (108) being fixedly mounted on the slide frame (105), a lithium battery lower seat (109) being slidably mounted on the slide rod (108), the lithium battery lower seat (109) and the screw rod (107) forming a threaded transmission, a plurality of lithium batteries (110) being placed on the lithium battery lower seat (109) through a feeding device, and the positive poles of two adjacent lithium batteries (110) facing in opposite directions.

2. A lithium battery series welding device according to claim 1, characterized in that: The feeding device comprises a feeding box (202) fixedly mounted on a feeding frame (201), a feeding motor (203) fixedly mounted on the feeding box (202), and a motor wheel (204) fixedly mounted on the motor shaft of the feeding motor (203).

3. A lithium battery series welding device according to claim 2, characterized in that: The feed box (202) is provided with two thumbwheel mechanisms, the thumbwheel mechanisms comprising a dividing wheel (207) rotatably mounted on the feed box (202), a dividing gear (208) fixedly mounted on the dividing wheel (207), a transfer gear (209) rotatably mounted on the feed box (202), the dividing gear (208) meshing with the transfer gear (209), the two transfer gears (209) meshing with each other, a lower transmission wheel (206) fixedly mounted on the left dividing wheel (207), a motor transmission belt (205) wound around the lower transmission wheel (206) and the motor wheel (204), a groove having the same shape as the lithium battery (110) is provided on the dividing wheel (207), the two dividing wheels (207) rotate in opposite directions, the feed box (202) is divided into two spaces, the lithium batteries (110) are stacked respectively, and the positive and negative poles of the lithium batteries (110) stacked on the two sides face opposite directions.

4. A lithium battery series welding device according to claim 1, characterized in that: The welding device comprises an electric cylinder frame (302) fixedly mounted on a vertical frame (301), a top electric cylinder (303) fixedly mounted on the electric cylinder frame (302), a lower pressure frame (304) fixedly mounted on the top of the top electric cylinder (303), an upper guide column (305) fixedly mounted on the lower pressure frame (304), the upper guide column (305) and the electric cylinder frame (302) being slidably mounted, and an upper seat (326) fixedly mounted on the lower pressure frame (304).

5. A lithium battery series welding device according to claim 4, characterized in that: Two resistance mechanisms are arranged on the lower pressure frame (304), and the resistance mechanism comprises an inner push electric cylinder (309) fixedly mounted on the lower pressure frame (304), an inner push plate (310) fixedly mounted on the top of the inner push electric cylinder (309), an inner push sliding column (311) fixedly mounted on the inner push plate (310), the inner push sliding column (311) is slidably mounted on the lower pressure frame (304), and a plurality of welding resistors (312) are arranged on the inner push plate (310).

6. A lithium battery series welding device according to claim 5, characterized in that: The main frame (101) is provided with two lifting mechanisms, the lifting mechanisms comprising a base (306) fixedly mounted on the main frame (101), a bottom sliding column (307) fixedly mounted on the base (306), a pressing frame (308) slidably mounted on the bottom sliding column (307), a groove frame (313) fixedly mounted on the pressing frame (308), a connecting frame (316) fixedly mounted on the base (306), an outer eccentric rotating disk (314) rotatably mounted on the connecting frame (316), an inner eccentric wheel (317) fixedly mounted on the outer eccentric rotating disk (314), an eccentric column (315) fixedly mounted on the outer eccentric rotating disk (314), the eccentric column (315) sliding in a long groove of the groove frame (313), and an eccentric rotating rod (318) eccentrically rotatably mounted on the inner eccentric wheel (317).

7. A lithium battery series welding device according to claim 6, characterized in that: A nickel sheet mechanism is provided on the base (306), and the nickel sheet mechanism comprises a fixed cylinder (320) fixedly mounted on the base (306), an inner sliding column (321) slidably mounted in the fixed cylinder (320), a rising frame (319) fixedly mounted on the inner sliding column (321), a nickel sheet frame (324) fixedly mounted on the rising frame (319), a plurality of nickel sheets (325) placed in the nickel sheet frame (324), an upper sliding column (322) fixedly mounted on the rising frame (319), the upper sliding column (322) and the fixed cylinder (320) slidably mounted, and a sliding column spring (323) is provided between the upper sliding column (322) and the fixed cylinder (320).

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