A fastening fixture for laser welding of battery modules

Abstract

The present invention relates to the field of battery module welding fixtures, and in particular to a fastening fixture for battery module laser welding, comprising a mounting platform, a left supporting slide, a right supporting slide, a battery mounting slide, a battery mounting slide drive plate, a pushing screw, a fixing block, a first tightening member, a guide support mold frame and a pressing mold frame, wherein the left supporting slide and the right supporting slide are symmetrically arranged on the mounting platform and are fixedly connected to the mounting platform. The present invention specifically designs a fixture suitable for battery module welding, which can tighten and fix the battery very accurately, in view of the problems that the battery position is not fixed during battery module welding, and the welding is prone to loose welding, the welding position deviates from the predetermined position, the welding efficiency is low and the welding yield is low.

Description

Technical Field

[0001] The present invention relates to the field of battery module welding fixtures, and in particular to a fastening fixture for battery module laser welding. Background Art

[0002] In recent years, my country's automobile industry has developed rapidly. According to conservative estimates by experts, the number of cars will reach 130 million by 2020. The large consumption of petroleum energy by automobiles and the resulting environmental pollution have made the transformation of transportation energy power a global consensus. The effective way to solve transportation energy consumption and environmental pollution is to develop, apply and promote new energy vehicles. International mainstream automobile companies, such as Ford and General Motors, have successively launched electric vehicles based on lithium-ion batteries. When battery modules are produced, first, raw materials (positive electrode materials, negative electrode materials, electrolytes, shells, etc.) are processed into lithium-ion battery cells through a series of manufacturing process flows. Then, several lithium-ion battery cells and other components are assembled into lithium-ion battery modules according to a series of assembly process operations; then, several lithium-ion battery modules are assembled into lithium-ion battery packs; finally, lithium-ion battery packs are placed on electric vehicles to provide them with power sources. Among them, the large-scale automated production of lithium-ion battery cells is already a very mature technology, which in turn promotes the modular production of lithium batteries. Lithium battery modules are composed of several to hundreds of battery cells connected in parallel and in series. In addition to the mechanism design part, the battery management system and thermal management system can form a relatively complete lithium battery pack system. Generally speaking, whether it is a soft pack, square, cylindrical or 18650 battery, the automated assembly process of the module starts with the loading of the battery cells. The incoming materials can be the packaging provided by the original supplier, or they can be special trays that have been uniformly sorted by the manufacturer after testing. The loading process can be manual operation, or it can be automatically loaded by a conveyor belt, and then grabbed by a robot through a gripper. At the same time as loading, the battery cell code is read (collecting the identity data information of a single battery cell), the battery cell polarity is detected (whether it is placed in the opposite direction), the battery cell is sorted and matched, and defective products are removed. After the incoming materials have passed the initial inspection and sorting, they will undergo processes such as laser cleaning - gluing - cell stacking, battery box assembly, tab cutting and shaping - module shell laser welding - module laser coding and screwing - module inspection - connecting piece laser welding, BIS system connection - module final inspection - module unloading, etc. according to different module and process requirements.

[0003] A battery module can be understood as an intermediate product between a battery cell and a pack formed by combining lithium-ion batteries in series and parallel and installing a single-cell battery monitoring and management device. Its structure must support, fix and protect the battery cell. During the production process of the battery module, different batteries need to be welded to the electrode columns through connecting sheets. When welding, the existing battery module directly places the battery in the laser welding equipment for welding. Due to the unstable position of the battery, there are often problems such as loose welding, deviation of the welding position from the predetermined position, low welding efficiency and low welding yield rate, which greatly affects the normal production and use requirements of the enterprise and increases the production cost of the enterprise. Summary of the invention

[0004] In view of the problems that the existing battery module is directly placed in the laser welding equipment for welding during welding, the battery position is not fixed, and it is easy to have loose welding, the welding position deviates from the predetermined position, the welding efficiency is low, and the welding yield is low, the present invention provides a fastening fixture for laser welding of battery modules, and its technical solution is as follows:

[0005] A fastening fixture for laser welding of battery modules comprises a mounting platform, a left supporting slide, a right supporting slide, a battery mounting slide, a battery mounting slide driving plate, a pushing screw, a fixing block, a first tightening member, a second tightening member, a third tightening member, a fourth tightening member, a guiding support mold frame and a pressing mold frame, the left supporting slide and the right supporting slide are symmetrically arranged on the mounting platform and fixedly connected to the mounting platform, a through groove is provided on the mounting platform, steps for supporting the battery mounting slide are provided on the left supporting slide and the right supporting slide, the battery mounting slide is installed on the steps on the left supporting slide and the right supporting slide, a battery mounting slide driving plate is fixedly installed on the bottom of the battery mounting slide, the battery mounting slide driving plate passes through the through groove provided on the mounting platform, a bearing seat is fixedly installed on the battery mounting slide driving plate, a bearing is installed in the bearing seat, and the fixing The block is fixedly installed at the left side of the lower part of the mounting platform, and a threaded through hole is opened in the horizontal radial part of the fixing block, the pushing screw is installed in the threaded through hole on the fixing block and is threadedly connected to the threaded through hole, the inner end of the pushing screw is installed at the inner ring position of the bearing and has an interference fit with the inner ring of the bearing, the first clamping member and the second clamping member are installed at the side position of the right supporting slide and the lower part of them is fixedly connected to the mounting platform, the third clamping member and the fourth clamping member are installed at the side position of the supporting slide and the lower part of them is fixedly connected to the mounting platform, the supporting mold frame for guiding and limiting the connecting piece is installed at the upper position of the battery pack, and a clamping mold frame for clamping the supporting mold frame is installed on the supporting mold frame, and a limiting block for limiting the battery pack is provided at one side end of the left supporting slide and the right supporting slide, and the limiting block is fixedly installed on the mounting platform.

[0006] The left supporting slide and the right supporting slide are the same structure.

[0007] The first tightening member, the second tightening member, the third tightening member and the fourth tightening member are composed of the same structure.

[0008] The first clamping member mainly includes an upper snap assembly, a snap connection assembly and an L-shaped support plate. The upper snap assembly is installed on the upper position of the clamping mold frame, the bottom of the L-shaped support plate is fixedly installed on the mounting platform, the snap connection assembly is installed on the L-shaped support plate and connected to the L-shaped support plate, and the upper snap assembly is snapped together with the L-shaped support plate through the snap connection assembly.

[0009] The upper buckle assembly is mainly composed of an L-shaped mounting portion and an upper clamping portion. The L-shaped mounting portion is fixedly mounted on the upper position of the clamping mold frame, and the upper clamping portion is fixedly mounted on the L-shaped mounting portion. A clamping groove for connecting the buckle connection assembly is provided on the upper clamping portion.

[0010] The snap-on connection assembly includes a fixed support mounting portion, a rotating handle, a driving pin, a U-shaped connecting frame and an adjusting nut. The upper portion of the rotating handle is hinged to the fixed support mounting portion, the driving pin is installed on the rotating handle, a mounting through hole is provided on the driving pin, the U-shaped connecting frame passes through the mounting through hole on the driving pin and is installed on the driving pin, and the adjusting nut is installed on the U-shaped connecting frame and positions the U-shaped connecting frame on the driving pin.

[0011] Furthermore, ball installation grooves are provided on the left supporting slide and the right supporting slide, and balls for sliding the battery mounting slide are installed in the ball installation grooves.

[0012] Furthermore, a threaded through hole is opened on the L-shaped support plate, an adjusting bolt is arranged in the threaded through hole, a clamping plate for tightening the battery pack is installed on the inner end of the adjusting bolt, a guide sleeve is fixedly installed on the clamping plate, and the inner end of the adjusting bolt is installed in the guide sleeve.

[0013] The upper parts of the guide support mold frame and the pressing mold frame are provided with guide through grooves for installing the connecting plate, and the pressing mold frame is also provided with pressing bolts for pressing the connecting plate.

[0014] The beneficial effects of the present invention are as follows: the overall structural design of the present invention is scientific, the production and processing technology is simple, and the installation and use are convenient. The present invention aims at the problems that the battery position is not fixed during the welding of the battery module, which is prone to loose welding, welding position deviation from the predetermined position, low welding efficiency and low welding yield. The present invention specifically designs a clamp suitable for battery module welding, which can accurately tighten and fix the battery. Moreover, the present invention can quickly fix and tighten the battery position during specific use. After the welding is completed, the battery module can also be quickly released from the position constraint, which greatly improves the production efficiency of the enterprise and the yield rate of the product, and meets the enterprise's use requirements for battery module welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0016] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0017] Figure 3 It is a main structural schematic diagram of the present invention;

[0018] Figure 4 It is a rear view structural schematic diagram of the present invention;

[0019] Figure 5 It is a right view structural schematic diagram of the present invention;

[0020] Figure 6 It is a schematic diagram of the top view of the structure of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the left supporting slide in the present invention;

[0022] Figure 8 It is a structural schematic diagram of the upper buckle assembly in the present invention;

[0023] Fig. 9 is a schematic structural diagram of the buckle connection assembly in the present invention;

[0024] Fig.10 It is a schematic diagram of the structure when the push screw in the present invention is installed;

[0025] Fig.11 It is a schematic diagram of the structure of the clamping plate of the present invention when it is installed;

[0026] Fig.12 It is a structural schematic diagram of the clamping plate, the guide sleeve and the adjusting bolt when they are installed in the present invention;

[0027] The numbers in the figure are: 1-installation platform, 2-left support slide, 3-right support slide, 4-battery installation slide, 5-battery installation slide driving plate, 6-pushing screw, 7-fixing block, 8-first tightening member, 9-second tightening member, 10-third tightening member, 11-fourth tightening member, 12-guide support mold frame, 13-pressing mold frame, 14-through groove, 15-step, 16-bearing seat, 17-threaded through hole , 18-limit block, 19-guide groove, 20-tensioning bolt, 21-L-shaped support plate, 22-L-shaped mounting portion, 23-upper clamping portion, 24-fixed support mounting portion, 25-rotating handle, 26-driving pin, 27-U-shaped connecting frame, 28-adjusting nut, 29-ball mounting groove, 30-ball, 31-adjusting bolt, 32-clamping plate, 33-guide sleeve, 34-battery pack, 35-connecting plate. DETAILED DESCRIPTION

[0028] Specific embodiment 1: The core of the present invention is to provide a fastening fixture for laser welding of battery modules. In view of the problems that the battery position of the battery module is not fixed during welding, it is easy to have loose welding, welding position deviates from the predetermined position, welding efficiency is low and welding yield is low, a fixture suitable for battery module welding is designed specifically, which can tighten and fix the battery very accurately. In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the drawings and specific implementation methods of the specification. It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly or indirectly connected to the other element. The terms "left" and "right" used to indicate orientation in this application document are based on the specific structure shown in the drawings and do not constitute a limitation on the structure. As shown in the attached drawings of the specification Figure 1-9As shown, a fastening fixture for laser welding of battery modules mainly comprises an installation platform 1, a left supporting slide 2, a right supporting slide 3, a battery installation slide 4, a battery installation slide driving plate 5, a pushing screw 6, a fixing block 7, a first tightening member 8, a second tightening member 9, a third tightening member 10, a fourth tightening member 11, a guide support mold frame 12 and a pressing mold frame 13. The left supporting slide 2 and the right supporting slide 3 for installing and supporting the battery installation slide 4 are symmetrically fixedly installed on the installation platform 1. A through groove 14 for the battery installation slide driving plate 5 to move therein is provided on the installation platform 1. A step 15 for supporting the battery installation slide 4 is provided on the left supporting slide 2 and the right supporting slide 3. The battery 34 is installed The battery installation slide 4 can be slidably installed on the steps 15 on the left supporting slide 2 and the right supporting slide 3. A battery installation slide driving plate 5 for driving the battery installation slide 4 to move is fixedly installed at the bottom of the battery installation slide 4. The battery installation slide driving plate 5 passes through the through groove 14 provided on the installation platform 1. A bearing seat 16 is fixedly installed on the battery installation slide driving plate 5. A bearing is installed in the bearing seat 16. A fixing block 7 is fixedly installed on the left side of the lower part of the installation platform 1. A threaded through hole 17 is provided in the horizontal radial part of the fixing block 7. A pushing screw 6 for driving the battery installation slide 4 to move is installed in the threaded through hole 17 on the fixing block 7 and is threadedly connected to the threaded through hole 17. The inner end of the pushing screw 6 is interference-installed on the inner ring position of the bearing for guiding The first clamping member 8 and the second clamping member 9 for clamping the support mold frame 12 and the clamping mold frame 13 are installed at the side of the right support slide 3 and are fixedly connected to the mounting platform 1. The third clamping member 10 and the fourth clamping member 11 for clamping the guide support mold frame 12 and the clamping mold frame 13 are installed at the side of the left support slide 2 and are fixedly connected to the mounting platform 1. The guide support mold frame 12 for guiding and limiting the connecting piece 35 is installed at the upper position of the battery pack 34. The clamping mold frame 13 for clamping the guide support mold frame 12 is installed on the guide support mold frame 12. A limit block 18 for limiting the battery pack 34 is provided at one side end of the left support slide 2 and the right support slide 3. The limit block 18 is fixedly installed on the mounting platform 1. In the specific production and processing process, the left support slide 2 and the right support slide 3 are the same structure, the first clamping member 8, the second clamping member 9, the third clamping member 10 and the fourth clamping member 11 are composed of the same structure, the first clamping member 8 mainly includes an upper buckle assembly, a buckle connection assembly and an L-shaped support plate 21, the upper buckle assembly that drives the pressing mold frame 13 to press down is installed at the upper position of the pressing mold frame 13, the bottom of the L-shaped support plate 21 for supporting the buckle connection assembly is fixedly installed on the mounting platform 1, and the buckle connection assembly is installed on the L-shaped support plate 21. When in specific use, the upper buckle assembly is clamped together with the L-shaped support plate 21 through the buckle connection assembly. The upper buckle assembly is mainly composed of an L-shaped mounting portion 22 and an upper clamping portion 23.The L-shaped mounting portion 22 is fixedly mounted on the upper position of the clamping mold frame 13, and the upper clamping portion 23 is fixedly mounted on the L-shaped mounting portion 22. A clamping groove for connecting the snap connection component is provided on the upper clamping portion 23; the snap connection component mainly includes a fixed support mounting portion 24, a rotating handle 25, a driving pin 26, a U-shaped connection frame 27 and an adjusting nut 28. The upper portion of the rotating handle 25 is hinged to the fixed support mounting portion 24, and the driving pin 26 for installing the U-shaped connection frame 27 is installed on the rotating handle 25. A mounting through hole is provided on the driving pin 26. The U-shaped connection frame 27 passes through the mounting through hole on the driving pin 26 and is installed on the driving pin 26. The adjusting nut 28 is installed The U-shaped connecting frame 27 and the two side parts of the driving pin 26 are threadedly connected to the U-shaped connecting frame 27. During specific operation, a single lithium-ion battery is first placed on the battery mounting slide 4, and then the battery pack 34 is clamped between the battery mounting slide 4 and the limit block 18 by rotating the push screw 6 on the fixing block 7. Specifically, the outer periphery of the push screw 6 is provided with a thread matching the inner thread of the threaded through hole 17 on the limit block 18. Therefore, when the push screw 6 rotates in the threaded through hole 17 on the limit block 18, it will move to the right direction relative to the limit block 18. Specifically, the left end of the push screw 6 is installed on the driving plate of the battery mounting slide 5 (the bearing seat 16 is fixedly mounted on the battery mounting slide driving plate 5), and the left end of the push screw 6 can rotate in the bearing. When the push screw 6 rotates to the right, it will drive the battery mounting slide driving plate 5 to move right in the through groove 14 on the mounting platform 1 through the bearing and the bearing seat 16. At this time, the battery mounting slide driving plate 5 drives the battery mounting slide 4 to clamp the battery pack 34 between the battery mounting slide 4 and the limit block 18. After completing the above steps, the operator can place the guide support mold frame 12 above the battery pack 34, and then install the electrode connecting plate 35 in the guide through groove 1 on the guide support mold frame 12. 9, then, the pressing mold frame 13 is pressed against the guide support mold frame 12. Specifically, the operator can clamp the closed end of the U-shaped connection frame 27 on the buckle connection component into the clamping groove in the upper clamping part 23 of the upper buckle component, and then push the rotating handle 25 clockwise toward the L-shaped support plate 21 to clamp the upper buckle component and the buckle connection component. At this time, the upper buckle component and the buckle connection component are found together, and the pressing mold frame 13 presses the guide support mold frame 12 against the battery pack 34. At this point, the fixing and clamping steps of the battery pack 34 are completed, and the operator can move the above clamped components to the optical welding machine equipment to weld the battery module.

[0029] Specific embodiment 2: As shown in the attached specification Figure 7As shown, in order to make the present invention have a more outstanding and excellent use effect during use, on the basis of the above-mentioned specific embodiment 1, the present invention provides a ball mounting groove 29 for installing a ball 30 on the left supporting slide 2 and the right supporting slide 3, and the ball 30 for sliding the battery mounting slide 4 is installed in the ball mounting groove 29. Specifically, after the ball 30 is installed in the ball mounting groove 29 on the left supporting slide 2 and the right supporting slide 3, the lower part of the battery mounting slide 4 is installed on the left supporting slide 2 and the right supporting slide 3 and contacts the ball 30 thereon, which greatly improves the sliding flexibility of the battery mounting slide 4 on the left supporting slide 2 and the right supporting slide 3.

[0030] Specific embodiment 3: As shown in the attached specification Fig.11 And the instruction manual Fig.12 As shown, in order to make the present invention have a more outstanding and excellent use effect during use, on the basis of the above-mentioned specific embodiment 1, a threaded through hole is provided on the L-shaped support plate 21, an adjusting bolt 31 is arranged in the threaded through hole, a clamping plate 32 for tightening the battery pack 34 is installed on the inner end of the adjusting bolt 31, a guide sleeve 33 is fixedly installed on the clamping plate 32, and the inner end of the adjusting bolt 31 is installed in the guide sleeve 33 and can rotate in the guide sleeve 33. Specifically, during the specific use, the adjusting bolt 31 rotates in the threaded through hole provided on the L-shaped support plate 21, and at the same time, the clamping plate 32 is pushed to move toward the side wall of the battery pack 34, thereby fixing and clamping the side wall of the battery pack 34, thereby improving the clamping effect of the battery pack 34 in the present invention. The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A fastening fixture for laser welding of battery modules, characterized in that: It includes an installation platform, a left supporting slide, a right supporting slide, a battery installation slide, a battery installation slide driving plate, a pushing screw, a fixing block, a first clamping member, a second clamping member, a third clamping member, a fourth clamping member, a guide support mold frame and a pressing mold frame. The left supporting slide and the right supporting slide are symmetrically arranged on the installation platform and fixedly connected to the installation platform. A through groove is provided on the installation platform. The left supporting slide and the right supporting slide are provided with steps for supporting the battery installation slide. The battery installation slide is installed on the steps on the left supporting slide and the right supporting slide. A battery installation slide driving plate is fixedly installed on the bottom of the battery installation slide. The battery installation slide driving plate passes through the through groove provided on the installation platform. A bearing seat is fixedly installed on the battery installation slide driving plate. A bearing is installed in the bearing seat. The fixing block is fixedly installed on the installation platform A threaded through hole is provided at the horizontal radial part of the fixed block at the left side of the lower part, the pushing screw is installed in the threaded through hole on the fixed block and is threadedly connected to the threaded through hole, the inner end of the pushing screw is installed at the inner ring position of the bearing and has an interference fit with the inner ring of the bearing, the first clamping member and the second clamping member are installed at the side position of the right supporting slide and the lower part thereof is fixedly connected to the mounting platform, the third clamping member and the fourth clamping member are installed at the side position of the supporting slide and the lower part thereof is fixedly connected to the mounting platform, the guiding support mold frame for guiding and limiting the connecting piece is installed at the upper position of the battery pack, a pressing mold frame for pressing the guiding support mold frame is installed on the guiding support mold frame, a limiting block for limiting the battery pack is provided at one side end of the left supporting slide and the right supporting slide, and the limiting block is fixedly installed on the mounting platform; The first clamping member mainly includes an upper buckle assembly, a buckle connection assembly and an L-shaped support plate, wherein the upper buckle assembly is installed at the upper position of the pressing mold frame, the bottom of the L-shaped support plate is fixedly installed on the mounting platform, the buckle connection assembly is installed on the L-shaped support plate and connected to the L-shaped support plate, and the upper buckle assembly is clamped together with the L-shaped support plate through the buckle connection assembly; The upper buckle assembly is mainly composed of an L-shaped mounting portion and an upper clamping portion. The L-shaped mounting portion is fixedly mounted on the upper position of the pressing mold frame, and the upper clamping portion is fixedly mounted on the L-shaped mounting portion. A clamping groove for connecting the buckle connection assembly is provided on the upper clamping portion. The buckle connection assembly includes a fixed support mounting portion, a rotating handle, a driving pin, a U-shaped connection frame and an adjusting nut. The upper portion of the rotating handle is hinged to the fixed support mounting portion. The driving pin is installed on the rotating handle. A mounting through hole is provided on the driving pin. The U-shaped connection frame penetrates the mounting through hole on the driving pin and is installed on the driving pin. The adjusting nut is installed on the U-shaped connection frame and positions the U-shaped connection frame on the driving pin. A ball installation groove is provided on the left supporting slide and the right supporting slide, and balls for sliding the battery installation slide are installed in the ball installation groove; A threaded through hole is provided on the L-shaped support plate, an adjusting bolt is arranged in the threaded through hole, a clamping plate for clamping the battery pack is installed on the inner end of the adjusting bolt, a guide sleeve is fixedly installed on the clamping plate, and the inner end of the adjusting bolt is installed in the guide sleeve; The upper parts of the guide support mold frame and the pressing mold frame are provided with guide through grooves for installing the connecting plate, and the pressing mold frame is also provided with pressing bolts for pressing the connecting plate.

2. A fastening fixture for laser welding of battery modules according to claim 1, characterized in that: The left supporting slide and the right supporting slide are the same structure.

3. A fastening fixture for laser welding of battery modules according to claim 1, characterized in that: The first clamping member, the second clamping member, the third clamping member and the fourth clamping member are composed of the same structure.

Images