Welding device for battery pack production

Abstract

The invention relates to the technical field of battery pack welding, in particular to a welding device for battery pack production, which comprises a welding device body, a feeding end of the welding device body is used for placing battery individuals, and the welding device body comprises a conveying mechanism and a welding mechanism for welding positive and negative electrodes of two aligned battery individuals; the conveying mechanism comprises a first conveying part and a second conveying part, and the first conveying part is used for carrying out single-row linear conveying on the battery individuals; by arranging the welding device body, the single-line conveying function of the battery individuals in different postures is achieved, in the welding process, the first conveying component is used for normally conveying the battery individuals with the positive electrodes facing upwards, and part of the battery individuals on the first conveying component are transferred through the second conveying component; and the posture adjusting function of the battery individuals is achieved, so that the two battery individuals in different postures can be synchronously moved into the welding mechanism to complete welding operation.

Description

Technical Field

[0001] The present invention relates to the field of battery pack welding, and in particular to a welding device for battery pack production. Background Art

[0002] A battery pack is composed of multiple battery cells arranged in a certain combination, wherein the positive and negative electrodes of each battery cell are welded together through conductive members, so that each battery cell is electrically connected.

[0003] In the related art, the process of welding individual batteries is to use a welding device to transport the individual batteries to the welding position, align the two individual batteries, and then weld them through the welding device; and the prior art discloses part of the battery welding device, the publication number is CN115255556A, which discloses a battery pack positive and negative pole arc welding equipment, including a duplex turntable, a first conveyor line, a second conveyor line, a material presentation mechanism, a welding mechanism, a flipping mechanism and a pushing mechanism, the duplex turntable includes a first turntable and a second turntable, the first turntable and the second turntable have a feeding station and a welding station.

[0004] When using the above-mentioned welding device to complete the battery welding process, the batteries need to be divided into two batches and placed on the battery loading mechanism at different positions. This loading method adds the work of dividing the batteries into batches for the staff, which increases the workload of the staff and prolongs the loading time, resulting in low overall welding efficiency. At the same time, if the number of batteries on both sides is inconsistent, it is easy for the batteries to be welded without being successfully aligned in pairs, thereby increasing the battery welding error rate. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a welding device for battery pack production.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a welding device for battery pack production, including a welding device body, the loading end of the welding device body is used to place battery individuals, the welding device body includes a conveying mechanism and a welding mechanism for welding the positive and negative poles of two aligned battery individuals, the conveying mechanism includes a first conveying component and a second conveying component, the first conveying component is used to convey the battery individuals in a single row in a straight line, the second conveying component is installed on the first conveying component, the second conveying component is used to flip the battery individuals on the first conveying component and continue to convey them, and the battery individuals and the flipped battery individuals are respectively conveyed to the welding mechanism by the first conveying component and the second conveying component, and the two battery individuals are kept aligned.

[0007] Preferably, the first conveying component includes a main body seat and two conveyor belts, and the two conveyor belts are connected to the main body seat in parallel through two driving parts. There is a gap between the two conveyor belts that is smaller than the end diameter of the battery individual. The main body seat is fixedly installed with a first cylinder at one end close to the welding mechanism, and the telescopic end of the first cylinder is fixedly installed with a push plate slidably arranged in the main body seat, and the outer surfaces of the two conveyor belts are correspondingly provided with limiting grooves for limiting the bottom ends of the battery individuals.

[0008] Preferably, the second conveying component includes a support seat, a pushing assembly and an import assembly, the support seat is fixedly mounted on the top of the main body seat, the pushing assembly is fixedly mounted in the main body seat and is directly below the gap, the pushing assembly is used to push the battery individuals conveyed on the first conveying component upward to the second conveying component, the support seat is connected to a conveyor belt for transmission, a plurality of evenly distributed clamping assemblies are fixedly mounted on the conveyor belt, the clamping assembly is used to clamp and fix the ends of the battery individuals, the import assembly is fixedly mounted on the support seat, the import assembly is used to convey the battery individuals clamped on the clamping assembly to the loading position on the welding mechanism.

[0009] Preferably, the pushing assembly includes a third cylinder and two extrusion blocks with inclined surfaces at the lower ends, the third cylinder and the extrusion blocks are fixedly mounted on the inner wall of the main body seat, the telescopic end of the third cylinder is fixedly mounted with an ejection plate, the two extrusion blocks are symmetrically distributed on both sides of the ejection plate, two movable grooves are symmetrically opened inside the ejection plate, a movable part is slidably mounted in the movable groove, a first elastic support part is connected between the movable part and the side wall of the movable groove, an end of the movable part is provided with an inclined surface, the end of the movable part with the inclined surface slides through the outer side of the ejection plate and fits with the inclined surface on the extrusion block, and the top end of the movable part slides through the top of the ejection plate and is fixedly mounted with a correction splint.

[0010] Preferably, the clamping assembly includes a fixed plate and two clamping plates, the fixed plate is fixedly installed on the outside of the conveyor belt, and two symmetrically distributed sliding grooves are provided on the side of the fixed plate away from the conveyor belt. The two symmetrically distributed sliding grooves are both slidably connected to the clamping plate, and a second elastic support member is connected between the clamping plate and the inner wall of the sliding groove.

[0011] Preferably, a connecting piece is fixedly installed on the outer side of the clamping plate, and a bevel slot is provided on one side of the connecting piece. The import assembly includes a fourth cylinder and a battery conveying bucket. The fourth cylinder is fixedly installed on the outer side of the main seat, and a contact push plate is fixedly installed on the telescopic end of the fourth cylinder. Spreading pieces are fixedly installed on both sides of the contact push plate, and an end of the spreading piece away from the contact push plate is provided with a slope adapted to the bevel slot. The battery conveying bucket is fixedly installed on the top of the support seat, and a through hole is provided at the lower end of the battery conveying bucket for individual batteries to slide and fall to the welding station of the welding mechanism.

[0012] Preferably, a placement groove is provided inside the two opposite side walls of the battery conveying bucket, and a guide rail groove connected to the placement groove is provided on the two opposite side walls of the battery conveying bucket. Three pulleys are rotatably installed in the placement groove, and the three pulleys are connected by a transmission belt. A rotating motor is fixedly installed on both sides of the battery conveying bucket, and the output end of the rotating motor rotates through the outside of the battery conveying bucket and is fixedly connected to one side of one of the pulleys. A stabilizing splint is fixedly installed on one side of the transmission belt through a third elastic support member, and the outer side of the third elastic support member is slidably connected to the inner side of the guide rail groove. Two contact blocks for squeezing the stabilizing splint are symmetrically fixedly installed on the side wall of the battery conveying bucket near the through hole.

[0013] Preferably, the welding mechanism includes a base fixedly mounted on the outside of the main body seat, a rotating slot is provided on the top of the base, and two driving pulleys distributed side by side are rotatably mounted on the bottom wall of the rotating slot, and a plurality of notches are evenly provided on the outside of the driving pulleys, and gears are fixedly mounted on the outside of the rotating shafts at the bottom of the two driving pulleys, and the two gears are meshed with each other. A driving motor is fixedly mounted on the lower end of the base, and the output end of the driving motor is fixedly connected to the bottom end of the rotating shaft of one of the driving pulleys, a stabilizing frame is fixedly mounted on the top of the base, a second cylinder is fixedly mounted on the upper end of the stabilizing frame, and a welding head for welding two aligned battery individuals is fixedly mounted on the telescopic end of the second cylinder.

[0014] Preferably, the gap formed by the notch and the rotating slot is adapted to the battery being processed, and the upper ends of the notches on the driving wheel disc close to the battery conveying bucket are all in an arc structure.

[0015] Preferably, the setting positions of the first cylinder and the battery conveying bucket are set in a one-to-one correspondence with the setting positions of the driving wheel, and the first cylinder drives the pushing plate to push the battery individual to the corresponding notch position on the driving wheel, and the battery conveying bucket slides the battery individual to the corresponding notch position on the driving wheel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) By setting up the welding device body, which is mainly used for welding batteries, a single-line conveying function for battery individuals with different postures is realized. During the welding process, the first conveying component is used to normally convey the battery individuals with the positive pole facing upward, while the second conveying component is used to transfer some battery individuals on the first conveying component and realize the posture adjustment function of the battery individuals, so that the battery individuals with two different postures can be synchronously moved to the welding mechanism to complete the welding operation;

[0018] (2) By setting up the first conveying component and the second conveying component for use in conjunction, on the one hand, the operation of loading batteries in batches by the staff is eliminated, which is conducive to reducing the workload of the staff and shortening the loading time, thereby improving the efficiency of welding; on the other hand, by adopting a single-line conveying method, there is no need to deliberately control the number of individual batteries conveyed, which is conducive to avoiding welding two batteries without successful alignment, thereby helping to reduce the battery welding error rate and better meet the needs of continuous welding processing of large quantities of battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the main body of the welding device for battery pack production provided by the present invention.

[0020] Figure 2 This is a structural schematic diagram of the local position of the conveying mechanism provided by the present invention.

[0021] Figure 3 for Figure 2 A partial enlarged view of area A is shown.

[0022] Figure 4 for Figure 2 A partial enlarged view of area B is shown.

[0023] Figure 5 for Figure 2 A partial enlarged view of region C is shown.

[0024] Figure 6 This is a schematic structural diagram of the pushing assembly provided by the present invention.

[0025] Figure 7 This is a schematic structural diagram of the second conveying component provided by the present invention.

[0026] Figure 8 This is a schematic structural diagram of the introduction component, clamping component and main body provided by the present invention.

[0027] Figure 9This is a schematic diagram of the structure between the introduction component and the clamping component provided by the present invention.

[0028] Figure 10 This is a schematic structural diagram of the clamping assembly provided by the present invention.

[0029] Figure 11 This is a structural schematic diagram of the battery conveying bucket provided by the present invention.

[0030] Figure 12 This is a schematic diagram of the structure between the stabilizing splint, transmission belt, pulley and rotating motor provided by the present invention.

[0031] Figure 13 This is a schematic diagram of the structure between the stabilizing splint, the third elastic member and the pulley provided by the present invention.

[0032] Figure 14 This is a structural schematic diagram of the welding mechanism provided by the present invention.

[0033] In the figure: 1. welding device body; 2. conveying mechanism; 21. first conveying component; 211. main body seat; 212. conveyor belt; 213. gap; 214. first cylinder; 215. push plate; 216. limit notch; 22. second conveying component; 221. support seat; 222. push assembly; 2221. third cylinder; 2222. extrusion block; 2223. ejector plate; 2224. movable groove; 2225. first elastic support member; 2226. movable member; 2227. correction splint; 223. introduction assembly; 2231. fourth cylinder; 2232. battery conveying bucket; 2233. contact push plate; 2234. spreading member; 2235. through hole; 2236. Placement slot; 2237. Pulley; 2238. Transmission belt; 2239. Rotating motor; 22310. Third elastic support member; 22311. Stabilizing splint; 22312. Guide rail slot; 2213. Contact block; 224. Conveyor belt; 225. Clamping assembly; 2251. Fixing plate; 2252. Clamping plate; 2253. Slide; 2254. Second elastic support member; 2255. Connecting member; 2256. Inclined notch; 3. Welding mechanism; 31. Base; 32. Rotating notch; 33. Driving wheel; 34. Notch; 35. Gear; 36. Driving motor; 37. Stabilizing frame; 38. Second cylinder; 39. Welding head; 4. Battery unit. DETAILED DESCRIPTION

[0034] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0035] Please refer to Figures 1 to 14The welding device for battery pack production includes a welding device body 1. The loading end of the welding device body 1 is used to place the battery individual 4. The welding device body 1 includes a conveying mechanism 2 and a welding mechanism 3 for welding the positive and negative poles of the two aligned battery individuals 4. The conveying mechanism 2 includes a first conveying component 21 and a second conveying component 22. The first conveying component 21 is used to convey the battery individual 4 in a single row in a straight line. The second conveying component 22 is installed on the first conveying component 21. The second conveying component 22 is used to flip the battery individual 4 on the first conveying component 21 and continue to convey it. The battery individual 4 and the flipped battery individual 4 are respectively conveyed to the welding mechanism 3 by the first conveying component 21 and the second conveying component 22, and the two battery individuals 4 are kept aligned.

[0036] In order to solve the problems of low processing efficiency and high battery welding error rate caused by batch conveying of batteries during battery welding, the battery pack production device provided by the present invention solves the above problems;

[0037] When using the welding device body 1 to weld the battery, the battery individuals 4 are placed on the loading end of the first conveying component 21. At this time, the positive poles of the battery individuals 4 face upwards, and the battery individuals 4 are slowly conveyed in a single line by the first conveying component 21. When the battery individuals 4 reach the position of the second conveying component 22, the first conveying component 21 stops running, and the battery individuals 4 are transferred and conveyed for the second time by the second conveying component 22. The battery individuals 4 transferred to the second conveying component 22 are turned over so that their positive poles face downwards, and continue to move with the second conveying component 22. After that, the first conveying component 21 stops running, and the battery individuals 4 are transferred to the second conveying component 22. The first conveying member 21 continues to operate, while the first conveying member 21 below conveys the battery cells 4 that have not entered the second conveying member 22. Finally, the first conveying member 21 and the second conveying member 22 synchronously convey the two battery cells 4 in different postures to the welding structure. The welding mechanism 3 drives the two battery cells 4 to move to the welding station. Then, the staff manually places the conductive connecting piece flat on the upper end of the two battery cells 4, and then welds the battery through the welding mechanism 3. After welding is completed, the welded battery pack is manually removed and the welding process is repeated for the next group of batteries.

[0038] By setting up the welding device body 1, the first conveying component 21 and the second conveying component 22 are mainly used in conjunction to realize the single-line conveying function of battery individuals 4 with different postures. During the welding process, the first conveying component 21 is used to normally convey the battery individuals 4 with the positive pole facing upward, and the second conveying component 22 is used to transfer part of the battery individuals 4 on the first conveying component 21, and realize the posture adjustment function of the battery individuals 4, so that the battery individuals 4 with two different postures can be moved synchronously to the welding mechanism 3 to complete the welding operation. On the one hand, it eliminates the need for staff to load the batteries in batches, which is conducive to reducing the workload of the staff and shortening the loading time to improve the welding work efficiency; on the other hand, by adopting a single-line conveying method, there is no need to deliberately control the conveying quantity of the battery individuals 4, which is conducive to avoiding welding two batteries without successful alignment, thereby helping to reduce the battery welding error rate and better meet the continuous welding processing needs of large quantities of battery packs.

[0039] As an embodiment of the present invention, the first conveying component 21 includes a main base 211 and two conveyor belts 212. The two conveyor belts 212 are connected to the main base 211 in parallel through two driving parts. There is a gap 213 between the two conveyor belts 212 that is smaller than the end diameter of the battery individual 4. The main base 211 is fixedly installed with a first cylinder 214 at one end close to the welding mechanism 3. The telescopic end of the first cylinder 214 is fixedly installed with a push plate 215 that is slidably arranged in the main base 211. The outer surfaces of the two conveyor belts 212 are correspondingly provided with limiting grooves 216 for limiting the bottom end of the battery individual 4.

[0040] During the linear conveying of the battery cells 4 by the first conveying member 21, the staff, at the loading end of the main body seat 211, places the battery cells 4 in sequence according to the positions of the limiting notches 216 on the conveyor belt 212, or assists in the placement and loading with the aid of a loading device. Since the gap 213 at the upper end of the main body seat 211 matches the diameter of the battery cells 4, the two conveyor belts 212 are driven synchronously by the driving member, and the battery cells can be driven to move along with the conveyor belts 212. Moreover, under the action of the two opposite side walls of the main body seat 211 contacting the outer sides of the battery cells 4, the battery cells 4 can be placed in the middle of the gap 213.

[0041] As an embodiment of the present invention, the second conveying component 22 includes a support seat 221, a pushing component 222 and an import component 223. The support seat 221 is fixedly installed on the top of the main seat 211, the pushing component 222 is fixedly installed in the main seat 211 and is directly below the gap 213. The pushing component 222 is used to push the battery individual 4 conveyed on the first conveying component 21 upward to the second conveying component 22. The support seat 221 is transmission-connected with a conveyor belt 224, and a plurality of evenly distributed clamping components 225 are fixedly installed on the conveyor belt 224. The clamping component 225 is used to clamp and fix the end of the battery individual 4. The import component 223 is fixedly installed on the support seat 221. The import component 223 is used to convey the battery individual 4 clamped on the clamping component 225 to the loading position on the welding mechanism 3.

[0042] When the second conveying member 22 is in use, the conveying direction of the second conveying member 22 is opposite to that of the first conveying member 21. The conveyor belt 224 is operated to drive the clamping assembly 225 thereon to operate synchronously and cyclically. When the conveyor belt 212 stops running, it just drives the battery individual 4 to move to the loading end position of the support seat 221. At this time, the conveyor belt 224 also stops running, which just drives one of the clamping assemblies 225 to stop above the battery individual 4. Then, the bottom end of the battery individual 4 can be pushed upward by the pushing assembly 222, so that the battery individual 4 moves upward, and finally the top end of the battery individual 4 contacts the clamping assembly 225 and is clamped by the clamping assembly 225, completing the transfer and conveying of the battery individual 4.

[0043] After that, the conveyor belt 212 and the conveyor belt 224 both start running. Under the operation of the conveyor belt 224, the clamping assembly 225 holding the battery individual 4 can be driven to flip upward, thereby adjusting the posture of the battery individual 4 so that its positive pole faces downward. When the battery individual 4 follows the clamping assembly 225 to move to the position of the introduction assembly 223, the conveyor belt 224 stops running again, just so that the other clamping assembly 225 rotates to the loading position of the support seat 221, and the conveyor belt 212 also stops running again, and drives a battery individual 4 to stay at The lower position of the clamping assembly 225 drives another battery unit 4 to stay on the push plate 215. At this time, the battery unit 4 on the clamping assembly 225 is transported to the welding mechanism 3 through the introduction assembly 223, and the push plate 215 is driven by the first cylinder 214, so that the push plate 215 can push the battery unit 4 to move into the welding mechanism 3. Finally, two battery units 4 with different postures can arrive at the welding mechanism 3 synchronously. Then, the welding mechanism 3 is operated to transfer and align the two battery units 4, and then the welding process is carried out.

[0044] By setting up the second conveying component 22, while maintaining the same loading route as the first conveying component 21, it is also used separately for the subsequent separate conveying of the battery individuals 4. While the battery individuals 4 are being separately conveyed, the flipping operation of the battery individuals 4 is simultaneously completed, and the positive pole of the battery individual 4 is adjusted to a downward state to meet the welding requirements of the subsequent welding mechanism 3.

[0045] As an embodiment of the present invention, the pushing assembly 222 includes a third cylinder 2221 and two extrusion blocks 2222 with inclined surfaces at the lower ends. The third cylinder 2221 and the extrusion blocks 2222 are both fixedly mounted on the inner wall of the main body seat 211. The telescopic end of the third cylinder 2221 is fixedly mounted with an ejection plate 2223. The two extrusion blocks 2222 are symmetrically distributed on both sides of the ejection plate 2223. The interior of the ejection plate 2223 is symmetrically provided with two movable grooves 2224. A movable member 2226 is slidably mounted in the movable groove 2224. A first elastic support member 2225 is connected between the movable member 2226 and the side wall of the movable groove 2224. The end of the movable member 2226 is provided with an inclined surface. The end of the movable member 2226 with the inclined surface slides through the outer side of the ejection plate 2223 and then fits into the inclined surface on the extrusion block 2222. The top end of the movable member 2226 slides through the top of the ejection plate 2223 and then is fixedly mounted with a correction splint 2227.

[0046] The first elastic support member 2225 is composed of a round rod and a spring sleeved on the outside of the round rod, and is mainly used to provide elastic support for the movable member 2226.

[0047] When the push assembly 222 is used to push the battery unit 4 toward the clamping assembly 225, in order to ensure that the clamping assembly 225 and the battery unit 4 can be accurately docked, the pushing assembly 222 is set to achieve this function. When the pushing assembly 222 is in use, the third cylinder 2221 extends upward, which can drive the ejection plate 2223 and the correction clamping plate 2227 to move upward synchronously until the top of the ejection plate 2223 contacts the bottom of the battery unit 4 and starts to drive the battery unit 4 to continue to move upward. In this process, the movable member 2226 also follows the ejection plate 2223 to move upward, and the inclined surface of the end of the movable member 2226 contacts the inclined surface of the extrusion block 2222 during the upward movement and is squeezed by the extrusion block 2222, which can cause the movable member 2226 to begin to contract toward the inside of the movable groove 2224 and synchronously squeeze the first elastic support member 2225, while the correction clamping plate 2227 follows the movable member 2226 to move toward the outside of the battery unit 4. The third cylinder 2221 stops extending and begins to shorten, while the ejector plate 2223, the correcting clamping plate 2227 and the movable part 2226 move downward together. Since the correcting clamping plate 2227 only contacts the outer side of the battery individual 4, it does not have a large clamping effect on the battery individual 4. At the same time, the holding force of the clamping assembly 225 is greater than the friction between the battery individual 4 and the correcting clamping plate 2227. Therefore, when the correcting clamping plate 2227 moves downward, the battery individual 4 will not fall off the clamping assembly 225 until the ejector plate 2223 is completely reset, completing the transfer operation of the battery individual 4.

[0048] By setting up the pushing component 222, on the one hand, it can be used in conjunction with the clamping component 225 to push the battery individual 4 up to be clamped and fixed in the clamping component 225, so as to realize the transfer function of the battery individual 4. On the other hand, by using the movable part 2226, the first elastic support part 2225, the extrusion block 2222 and the correction clamp 2227 in conjunction with each other, in the process of pushing the battery individual 4, the correction clamp 2227 can be made to approach the battery individual 4 and finally contact the outer side of the battery individual, which not only realizes the auxiliary support effect on the battery individual 4, but also helps to avoid the battery individual 4 from tilting during the upward movement; and by the two correction clamps 2227 moving close to each other synchronously, the battery individual 4 can be driven to move toward the middle to realize the position correction function of the battery individual 4, which helps to help the battery individual 4 and the clamping component 225 maintain precise alignment, so as to facilitate the subsequent smooth docking of the two.

[0049] As an embodiment of the present invention, the clamping assembly 225 includes a fixed plate 2251 and two clamping plates 2252. The fixed plate 2251 is fixedly installed on the outside of the conveyor belt 212. Two symmetrically distributed sliding grooves 2253 are provided on the side of the fixed plate 2251 away from the conveyor belt 212. The two symmetrically distributed sliding grooves 2253 are both slidably connected to the clamping plate 2252. A second elastic support member 2254 is connected between the clamping plate 2252 and the inner wall of the sliding groove 2253.

[0050] An arc surface is provided at the bottom end of the clamping plate 2252, which can reduce the resistance when contacting the top of the battery individual 4, making it easier for the two clamping plates 2252 to expand to both sides. The second elastic support member 2254 is composed of a round rod and a spring sleeved on the outside of the round rod, which mainly provides elastic support for the second elastic support member 2254. A protective layer can be provided on the side wall of the clamping plate 2252 to avoid wear on the outside of the battery individual 4.

[0051] When the clamping assembly 225 clamps and fixes the battery individual 4, the ejector plate 2223 pushes the battery individual 4 upward, so that the top of the battery individual 4 gradually approaches the clamping plate 2252. When the top of the battery individual 4 contacts the clamping plate 2252, the two clamping plates 2252 can be squeezed to expand to both sides, and the second elastic support member 2254 also begins to shrink until the two clamping plates 2252 are expanded to a size that matches the diameter of the battery individual 4. As the battery individual 4 continues to move upward, the battery individual 4 smoothly enters the clamping assembly 225 and no longer generates thrust on the clamping plate 2252 until the top of the battery individual 4 is about to contact the bottom of the fixing plate 2251. At this time, the ejector plate 2223 no longer moves upward and begins to move downward, completing the transfer operation of the battery individual 4.

[0052] As an embodiment of the present invention, a connecting piece 2255 is fixedly installed on the outer side of the clamping plate 2252, and a bevel slot 2256 is provided on one side of the connecting piece 2255. The import assembly 223 includes a fourth cylinder 2231 and a battery conveying bucket 2232. The fourth cylinder 2231 is fixedly installed on the outer side of the main seat 211. The telescopic end of the fourth cylinder 2231 is fixedly installed with a contact push plate 2233. Spreading pieces 2234 are fixedly installed on both sides of the contact push plate 2233. The spreading piece 2234 is provided with a slope adapted to the bevel slot 2256 at one end away from the contact push plate 2233. The battery conveying bucket 2232 is fixedly installed on the top of the support seat 221. The lower end of the battery conveying bucket 2232 is provided with a through hole 2235 for the battery individual 4 to slide and fall to the welding station of the welding mechanism 3.

[0053] When the clamping assembly 225 drives the battery unit 4 to move to the position of the introduction assembly 223, the spreading piece 2234 is aligned with the inclined notch 2256 on the connecting piece 2255. The introduction assembly 223 begins to separate the battery unit 4 from the clamping assembly 225 and transport the battery unit 4 to the welding mechanism 3.

[0054] When the introduction component 223 is in use, the fourth cylinder 2231 is extended to drive the contact push plate 2233 and the spreading piece 2234 to approach the battery unit 4. Afterwards, the inclined surface of the end of the spreading piece 2234 first contacts the inclined surface notch 2256, and as the spreading piece 2234 continues to move, a thrust is generated on the connecting piece 2255, so that the clamping plate can move outward. When the contact push plate 2233 contacts the outer side of the battery unit 4, the clamping plate and the battery unit 4 are completely separated. At this time, as the contact push plate 2233 continues to move, the battery unit 4 can be pushed to move toward the battery conveying bucket 2232. After that, the battery conveying bucket 2232 smoothly enters the battery conveying bucket 2232 and, under the guidance of the battery conveying bucket 2232, finally slides through the through hole 2235 to the loading position of the welding mechanism 3 below, completing the transfer operation of the battery unit 4.

[0055] By setting up the introduction component 223, on the one hand, it is used to transfer the battery individual 4 from the clamping component 225 to the loading position of the welding mechanism 3, thereby realizing the automatic transfer function of the battery individual 4 from the second conveying component 22 to the welding mechanism 3. On the other hand, by cooperating with the clamping component 225, the cooperation between the spreading component 2234 and the connecting component 2255 can be utilized to release the clamping effect of the clamping component 225 on the battery individual 4 before pushing the battery individual 4 to move, which is beneficial to reducing the resistance encountered when the contact push plate 2233 is pushed, making the pushing action of the contact push plate 2233 smoother, and further beneficial to reducing the influence of the clamping component 225 on the movement of the battery individual 4, and helping the battery individual 4 on the second conveying component 22 and the battery individual 4 on the first conveying component 21 to reach the loading position in the welding mechanism 3 synchronously.

[0056] As an embodiment of the present invention, a placement groove 2236 is provided inside the two opposite side walls of the battery conveying bucket 2232, and a guide groove 22312 is provided on the two opposite side walls of the battery conveying bucket 2232, which is connected to the placement groove 2236. Three pulleys 2237 are rotatably installed in the placement groove 2236, and the three pulleys 2237 are connected by a transmission belt 2238. A rotating motor 2239 is fixedly installed on both sides of the battery conveying bucket 2232, and the output end of the rotating motor 2239 rotates through the outside of the battery conveying bucket 2232 and is fixedly connected to one side of one of the pulleys 2237. One side of the transmission belt 2238 is connected by a third elastic support member 22 310 is fixedly installed with a stabilizing splint 22311, and the outer side of the third elastic support member 22310 is slidably connected to the inner side of the guide rail groove 22312. Two contact blocks 22313 for squeezing the stabilizing splint 22311 are symmetrically fixedly installed on the side wall of the battery conveying bucket 2232 near the through hole 2235. The third elastic support member 22310 is composed of a spring rod, and the telescopic part of the spring rod is set to a square rod, which can prevent the spring rod from relative rotation to ensure the connection stability of the stabilizing splint 22311, and the end of the spring rod connected to the transmission belt 2238 is set to a shape adapted to the guide rail groove 22312, so that the spring rod can slide in cooperation with the guide rail groove 22312.

[0057] Both ends of the stabilizing clamp 22311 expand outwards to form an eight-shaped structure, which facilitates the stabilizing clamp 22311 to be opened by being squeezed by the battery unit 4 or the contact block 22313.

[0058] Since the slide in the battery conveying bucket 2232 has a large inclination, in order to prevent the battery individual 4 from having a large degree of positional deviation when sliding in the battery conveying bucket 2232, a stabilizing splint 22311 is further provided on the battery conveying bucket 2232 to assist in supporting and moving the battery individual 4. In the process of using the contact push plate 2233 to push the battery individual 4 into the battery conveying bucket 2232, the battery individual 4 gradually separates from the clamping plate 2252 and approaches the stabilizing splint 22311, which can simultaneously squeeze the two stabilizing splints 22311 to unfold, and finally the battery individual 4 smoothly enters between the two stabilizing splints 22311. At this time, the battery individual 4 is clamped and fixed. Afterwards, by rotating the motor 2239, the pulley 2237 and the transmission The belt 2238, the third elastic support member 22310 and the stabilizing splint 22311 move together, so that the battery individual 4 moves along the guide rail groove 22312 path. The battery individual 4 first moves upward so that its bottom end will not contact the bottom wall of the battery conveying bucket 2232. When the stabilizing splint 22311 moves to the lower end of the battery conveying bucket 2232, the contact block 22313 is just in contact with the stabilizing splint 22311, and then the stabilizing splint 22311 is squeezed to expand. At this time, the battery individual 4 is just aligned with the through hole 2235, and the battery individual 4 loses its clamping effect and falls downward into the loading position of the welding mechanism 3, completing the transfer of the battery individual 4. Afterwards, by rotating the motor 2239 in the opposite direction, the stabilizing splint 22311 can be driven to move up and reset.

[0059] By further arranging a stabilizing splint 22311, a transmission belt 2238, a pulley 2237, and a rotating motor 2239 on the battery conveying bucket 2232 and using them in conjunction with each other, an auxiliary transfer structure for the battery individual 4 is formed. The stabilizing splint 22311 clamps the battery individual and allows it to move in the battery conveying bucket 2232, so that the battery individual 4 always maintains a vertical state when moving, which is conducive to the battery individual 4 accurately falling through the hole 2235 to the loading position in the welding mechanism 3.

[0060] As an embodiment of the present invention, the welding mechanism 3 includes a base 31 fixedly mounted on the outside of the main base 211, a rotating slot 32 is provided on the top of the base 31, and two driving pulleys 33 distributed side by side are rotatably mounted on the bottom wall of the rotating slot 32. A plurality of notches 34 are evenly provided on the outside of the driving pulleys 33, and gears 35 are fixedly mounted on the outside of the rotating shafts at the bottom of the two driving pulleys 33. The two gears 35 are engaged with each other. A driving motor 36 is fixedly mounted on the lower end of the base 31, and the output end of the driving motor 36 is fixedly connected to the bottom end of the rotating shaft of one of the driving pulleys 33. A stabilizing frame 37 is fixedly mounted on the top of the base 31, and a second cylinder 38 is fixedly mounted on the upper end of the stabilizing frame 37. A welding head 39 for welding two aligned battery individuals 4 is fixedly mounted on the telescopic end of the second cylinder 38.

[0061] When using the welding mechanism 3 to weld two battery individuals 4 with different postures, at this time, the two battery individuals 4 with different postures enter the two loading positions on the welding mechanism 3 from the first conveying part 21 and the second conveying part 22 respectively, that is, the recesses 34 corresponding to the first conveying part 21 and the second conveying part 22. Afterwards, the driving motor 36 is operated to drive the two gears 35 to rotate synchronously, and finally the two driving wheels 33 rotate in opposite directions, and drive the two battery individuals 4 with different postures to slide synchronously, and finally the outer sides of the two battery individuals 4 are tangent and kept aligned. At this time, the two driving wheels 33 stop rotating, and then the staff places the conductive connecting plate on the top of the two battery individuals 4, and then extends the second cylinder 38 downward to drive the welding head 39 to move above the conductive connecting plate and perform welding. After the welding is completed, the welding head 39 moves up and resets, and the staff manually takes out the welded battery pack.

[0062] As an embodiment of the present invention, the gap 213 formed by the notch 34 and the rotating slot 32 is adapted to the processed battery individual 4, and the upper end of the notch 34 on the driving wheel 33 close to the side of the battery conveying bucket 2232 is an arc surface structure.

[0063] The arc surface mechanism can play a certain buffering and correcting role when the battery individual 4 and the battery conveying bucket 2232 fall to the position of the recess 34 of the welding mechanism 3, which is conducive to the battery individual 4 smoothly entering the recess 34.

[0064] As an embodiment of the present invention, the setting positions of the first cylinder 214 and the battery conveying bucket 2232 are set in a one-to-one correspondence with the setting positions of the driving wheel. The first cylinder 214 drives the pushing plate 215 to push the battery individual 4 to move to the corresponding notch 34 position on the driving wheel 33, and the battery conveying bucket 2232 slides the battery individual 4 to the corresponding notch 34 position on the driving wheel 33.

[0065] The working principle of the welding device for battery production provided by the present invention is as follows:

[0066] Step 1: First, place the battery cells 4 on the loading end of the first conveying member 21, with the positive poles of the battery cells 4 facing upwards, and slowly convey the battery cells 4 in a single line through the first conveying member 21;

[0067] Step 2: When the battery cell 4 reaches the second conveying member 22, the first conveying member 21 stops and the battery cell 4 is transferred to the second conveying member 22 for a second time. The battery cell 4 transferred to the second conveying member 22 is flipped so that the positive electrode faces downward and continues to move along with the second conveying member 22.

[0068] Step 3: The first conveying component 21 then continues to operate, while the lower first conveying component 21 conveys the battery cells 4 that have not entered the second conveying component 22. Finally, the first conveying component 21 and the second conveying component 22 synchronously convey the two battery cells 4 in different postures to the welding structure.

[0069] Step 4: The two battery cells 4 are moved to the welding station by the welding mechanism 3. The staff then manually places the conductive connecting piece flat on the upper ends of the two battery cells 4. The batteries are then welded by the welding mechanism 3. After welding is completed, the welded battery pack is manually removed and the welding is repeated for the next group of batteries.

[0070] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for producing battery packs, comprising a welding device body (1), wherein a loading end of the welding device body (1) is used for placing battery cells (4), and wherein: The welding device body (1) includes a conveying mechanism (2) and a welding mechanism (3) for welding the positive and negative electrodes of two aligned battery individuals (4). The conveying mechanism (2) includes a first conveying component (21) and a second conveying component (22). The first conveying component (21) is used to convey the battery individuals (4) in a single row and in a straight line. The second conveying component (22) is installed on the first conveying component (21). The second conveying component (22) is used to flip the battery individuals (4) on the first conveying component (21) and continue to convey them. The battery individuals (4) and the flipped battery individuals (4) are respectively conveyed to the welding mechanism (3) by the first conveying component (21) and the second conveying component (22), and the two battery individuals (4) are kept aligned.

2. The welding device for battery pack production according to claim 1, characterized in that: The first conveying component (21) includes a main body seat (211) and two conveyor belts (212). The two conveyor belts (212) are connected to the main body seat (211) in parallel through two driving members. There is a gap (213) between the two conveyor belts (212) that is smaller than the end diameter of the battery individual (4). A first cylinder (214) is fixedly installed at one end of the main body seat (211) close to the welding mechanism (3). A push plate (215) is fixedly installed at the telescopic end of the first cylinder (214) and is slidably arranged in the main body seat (211). The outer surfaces of the two conveyor belts (212) are correspondingly provided with limiting notches (216) for limiting the bottom ends of the battery individual (4).

3. The welding device for battery pack production according to claim 2, characterized in that: The second conveying component (22) comprises a support seat (221), a pushing component (222) and an introduction component (223); the support seat (221) is fixedly mounted on the top of the main body seat (211); the pushing component (222) is fixedly mounted in the main body seat (211) and is located directly below the gap (213); the pushing component (222) is used to push the battery unit (4) conveyed on the first conveying component (21) upward onto the second conveying component (22); A conveyor belt (224) is connected to the support seat (221) for transmission. A plurality of evenly distributed clamping assemblies (225) are fixedly mounted on the conveyor belt (224). The clamping assemblies (225) are used to clamp and fix the ends of individual batteries (4). The introduction assembly (223) is fixedly mounted on the support seat (221). The introduction assembly (223) is used to transport the individual batteries (4) clamped by the clamping assemblies (225) to a loading position on the welding mechanism (3).

4. The welding device for battery pack production according to claim 3, characterized in that: The pushing assembly (222) includes a third cylinder (2221) and two extrusion blocks (2222) with inclined surfaces at the lower ends. The third cylinder (2221) and the extrusion blocks (2222) are fixedly mounted on the inner wall of the main body seat (211). The telescopic end of the third cylinder (2221) is fixedly mounted with an ejection plate (2223). The two extrusion blocks (2222) are symmetrically distributed on both sides of the ejection plate (2223). The ejection plate (2223) has two movable grooves (2224) symmetrically arranged inside. A movable part (2226) is slidably installed in the groove (2224), and a first elastic support part (2225) is connected between the movable part (2226) and the side wall of the movable groove (2224). The end of the movable part (2226) is provided with an inclined surface. The end of the movable part (2226) with the inclined surface slides through the outside of the ejection plate (2223) and fits with the inclined surface on the extrusion block (2222). The top end of the movable part (2226) slides through the top of the ejection plate (2223) and is fixedly installed with a correction splint (2227).

5. The welding device for battery pack production according to claim 3, characterized in that: The clamping assembly (225) includes a fixed plate (2251) and two clamping plates (2252), wherein the fixed plate (2251) is fixedly mounted on the outer side of the conveyor belt (212), and two symmetrically distributed chutes (2253) are provided on the side of the fixed plate (2251) away from the conveyor belt (212), and the two symmetrically distributed chutes (2253) are both slidably connected to the clamping plate (2252), and a second elastic support member (2254) is connected between the clamping plate (2252) and the inner wall of the chutes (2253).

6. The welding device for battery pack production according to claim 5, characterized in that: A connecting piece (2255) is fixedly installed on the outer side of the clamping plate (2252), and a bevel notch (2256) is provided on one side of the connecting piece (2255). The introduction component (223) includes a fourth cylinder (2231) and a battery conveying bucket (2232). The fourth cylinder (2231) is fixedly installed on the outer side of the main seat (211). A contact push plate (2233) is fixedly installed on the telescopic end of the fourth cylinder (2231). The contact push plate Spreading parts (2234) are fixedly installed on both sides of (2233), and the spreading part (2234) is provided with an inclined surface adapted to the inclined surface notch (2256) at one end away from the contact push plate (2233). The battery conveying bucket (2232) is fixedly installed on the top of the support seat (221), and the lower end of the battery conveying bucket (2232) is provided with a through hole (2235) for the battery individual (4) to slide down to the welding station of the welding mechanism (3).

7. The welding device for battery pack production according to claim 6, characterized in that: The battery conveying bucket (2232) has two opposite side walls with a placement groove (2236) formed therein, and the two opposite side walls of the battery conveying bucket (2232) have two guide rail grooves (22312) connected to the placement groove (2236). Three pulleys (2237) are rotatably installed in the placement groove (2236), and the three pulleys (2237) are connected to each other by a transmission belt (2238). A rotating motor (2239) is fixedly installed on both sides of the battery conveying bucket (2232), and the output end of the rotating motor (2239) is connected to the output end of the rotating motor (2239). After rotating through the outer side of the battery conveying bucket (2232), it is fixedly connected to one side of one of the pulleys (2237); one side of the transmission belt (2238) is fixedly installed with a stabilizing splint (22311) through a third elastic support member (22310); the outer side of the third elastic support member (22310) is slidably connected to the inner side of the guide rail groove (22312); two contact blocks (22313) for squeezing the stabilizing splint (22311) are symmetrically fixedly installed on the side wall of the battery conveying bucket (2232) near the through hole (2235).

8. The welding device for battery pack production according to claim 6, characterized in that: The welding mechanism (3) includes a base (31) fixedly mounted on the outside of the main body (211), a rotating slot (32) is provided on the top of the base (31), and two driving wheels (33) distributed side by side are rotatably mounted on the bottom wall of the rotating slot (32), and a plurality of notches (34) are evenly provided on the outside of the driving wheels (33), and gears (35) are fixedly mounted on the outside of the rotating shafts at the bottom of the two driving wheels (33), and the two gears (35) are meshed with each other. A driving motor (36) is fixedly mounted on the lower end of the base (31), and the output end of the driving motor (36) is fixedly connected to the bottom end of the rotating shaft of one of the driving wheels (33). A stabilizing frame (37) is fixedly mounted on the top of the base (31), and a second cylinder (38) is fixedly mounted on the upper end of the stabilizing frame (37), and a welding head (39) for welding two aligned battery individuals (4) is fixedly mounted on the telescopic end of the second cylinder (38).

9. The welding device for battery pack production according to claim 8, characterized in that: The gap (213) formed by the notch (34) and the rotating slot (32) is adapted to the processed battery individual (4), and the upper end of the notch (34) on the driving wheel (33) close to the side of the battery conveying bucket (2232) is an arc surface structure.

10. The welding device for battery pack production according to claim 8, characterized in that: The setting positions of the first cylinder (214) and the battery conveying bucket (2232) are set in a one-to-one correspondence with the setting position of the driving wheel disc. The first cylinder (214) drives the pushing plate (215) to push the battery individual (4) to move to the corresponding notch (34) position on the driving wheel disc (33), and the battery conveying bucket (2232) slides the battery individual (4) to the corresponding notch (34) position on the driving wheel disc (33).

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