Precise clamping busbar for large-current battery module

Abstract

The present application relates to busbar manufacturing technical field, especially to a kind of precision clamping busbar of adapting to large current battery module, to the existing busbar in welding processing, prone to deformation, welding precision problem such as poor, provide a kind of precision clamping busbar of adapting to large current battery module, including positioning jig, the copper sheet and nickel sheet are equipped on the positioning jig upper end, positioning jig upper end is equipped with multiple convex blocks, copper sheet is equipped with multiple clamping holes matched with convex block, when clamping hole is set on convex block, copper sheet can be fixed positioning;Positioning jig upper end is also equipped with multiple convex blocks matched with nickel sheet, when nickel sheet is pressed between convex block, nickel sheet can be fixed positioning;The device can be positioned and firmly clamped to busbar in all directions accurately by adding special positioning jig, limit displacement and deformation space of busbar in welding process from the source.

Description

Technical Field

[0001] This invention relates to the field of bus manufacturing technology, and in particular to a precision clamping bus adapted to high-current battery modules. Background Technology

[0002] As a core conductive connection component in high-current battery modules, the assembly precision and structural stability of the busbar directly affect the battery module's conductivity, heat dissipation performance, and overall lifespan. In scenarios such as new energy vehicles and energy storage devices, where the power density and reliability requirements of battery modules are increasingly stringent, high-current battery modules place even stricter standards on the dimensional accuracy and welding consistency of the busbar.

[0003] Traditional busbar welding processes often rely on manual positioning or simple tooling due to the lack of dedicated positioning and clamping structures. This approach has significant drawbacks: Firstly, busbars are typically thin conductive sheets with high ductility, making them prone to thermal deformation under the high temperatures of welding. Uneven force during clamping can also cause warping and misalignment, which are difficult to recover from, directly affecting the fit between the busbar and the battery terminals. Secondly, insufficient positioning accuracy can lead to deviations at welding points, reducing assembly consistency and potentially causing increased resistance and abnormal heating at the weld, ultimately resulting in decreased conductivity of the battery module and increased safety hazards. These shortcomings severely restrict the mass production quality and stability of high-current battery modules, failing to meet the precision manufacturing requirements of high-end energy storage and new energy vehicles. Therefore, a precision clamping busbar adapted for high-current battery modules is designed to address these issues. Summary of the Invention

[0004] This invention addresses the problems of deformation and poor welding precision that often occur during the welding process of existing busbars. It provides a precision clamping busbar adapted to high-current battery modules. This device, by adding a dedicated positioning fixture, can accurately position and firmly clamp the busbar from all directions, limiting the displacement and deformation space of the busbar during the welding process from the source. The positioning fixture can achieve a close fit and fixation according to the structural dimensions of the busbar, evenly distributing the clamping force and welding heat, avoiding deformation problems such as warping and displacement caused by localized force concentration or uneven thermal expansion and contraction.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows:

[0006] A precision clamping bus adapted to high-current battery modules includes a positioning fixture. The upper end of the positioning fixture is provided with a copper sheet and a nickel sheet. The upper end of the positioning fixture is provided with multiple protruding locking blocks. The copper sheet has multiple locking holes that cooperate with the protruding locking blocks. When the locking holes are fitted onto the protruding locking blocks, the copper sheet can be fixedly positioned. The upper end of the positioning fixture is also provided with multiple protruding stops that cooperate with the nickel sheet. When the nickel sheet is pressed between the protruding stops, the nickel sheet can be fixedly positioned. The inner wall of the positioning fixture is provided with multiple venting grooves and multiple through holes.

[0007] The lower end of the positioning fixture is provided with a clamping mechanism, which includes two positioning horizontal plates. The inner end faces of the two positioning horizontal plates are provided with two movable adjusting plates. The inner walls of the adjusting plates are provided with movable adjusting blocks. Each adjusting block is provided with a clamp. Each adjusting block is provided with a positioning component. When the positioning component is opened, it can fix the position of the adjusting plate and the adjusting block. Each adjusting block is also provided with a rotatable handle. When the handle is rotated, the clamp can be moved outward and the positioning component can be closed.

[0008] Each adjusting block has a cross seat on its inner wall, and multiple movable square sliders are slidably connected to the inner wall of each cross seat. Each clamp includes multiple incomplete threaded blocks, and each incomplete threaded block is installed on the corresponding square slider.

[0009] Each cross seat has a drive disk rotatably connected to its upper end, and each handle is fixed to the outer surface of the corresponding drive disk. Each square slider has a first sliding pin fixed to its upper surface, and each incomplete threaded block is fixed to the corresponding first sliding pin. Each drive disk has multiple variable diameter grooves that cooperate with the first sliding pins on its inner wall.

[0010] The inner wall of each cross-shaped seat is provided with multiple first springs that cooperate with the square slider.

[0011] Each positioning component includes two pins that are slidably connected to the adjusting block. Multiple slots that cooperate with the pins are provided on the inner walls of both sides of the adjusting plate. The adjusting blocks are slidably connected to the corresponding inner walls of the adjusting plate.

[0012] The inner walls of both ends of the adjusting block are provided with movable long pins, and a second guide plate is fixed to the inner end face of each of the two pins. The inner wall of the second guide plate is provided with a second inclined groove that cooperates with the long pin.

[0013] The inner wall of each adjustment block is fixedly connected to multiple rectangular frames, and the inner wall of each rectangular frame is slidably connected to small sliders. Long pins are fixedly connected to the inner end faces of the corresponding two small sliders. The interior of each adjustment block is provided with two movable first guide plates, and the inner wall of each first guide plate is provided with a first inclined groove that cooperates with the long pin.

[0014] The inner wall of each adjusting block is provided with a movable long guide frame. Two third guide plates are fixedly connected to the two end faces of each long guide frame. Side baffles are fixedly connected to the inner walls of both ends of the adjusting plate. The third guide plates are slidably connected to the side baffles. The inner walls of the side baffles are slidably connected with locking pins. Multiple slots that cooperate with the locking pins are provided on the inner end face of each positioning cross plate. Short pins are provided on the inner ends of the two locking pins. The inner walls of the third guide plates are provided with third inclined grooves that cooperate with the short pins.

[0015] A U-shaped connecting plate is fixed to the outer end face of each of the two small sliders, and the inner wall of the U-shaped connecting plate is provided with an insertion hole that matches the long guide frame.

[0016] Compared with the prior art, the present invention has the following advantages: In use, this invention uses a clamping mechanism to quickly fix the positioning fixture. When the locking hole is engaged with the protruding locking block, the copper sheet is limited and fixed, allowing it to be detachably mounted on the positioning fixture. When the nickel sheet is pressed between two sets of corresponding protruding blocks, it is fixed and positioned, and can be detachably mounted on the positioning fixture. This fixing and positioning of the copper and nickel sheets prevents busbar deformation during welding, thus improving welding accuracy. Multiple through holes facilitate fixing the positioning fixture itself and allow for venting of the copper sheet during welding. The venting grooves accelerate heat dissipation during welding. The device effectively removes gases generated during high-temperature welding, facilitating the removal of the copper sheets after welding, as tightly adhered copper sheets are difficult to lift. By incorporating a dedicated positioning fixture, the device provides comprehensive, precise positioning and secure clamping of the busbar, limiting displacement and deformation during welding. The positioning fixture conforms to the busbar's structural dimensions, evenly distributing clamping force and welding heat, preventing warping, misalignment, and other deformations caused by concentrated local forces or uneven thermal expansion and contraction. This ensures the busbar maintains its original structural precision and flatness after welding, meeting the stability requirements of high-current battery modules. The positioning fixture is essential for busbar welding. This provides a stable reference positioning, enabling precise calibration of the relative positions of the busbar, battery terminals, and other components, effectively avoiding positional deviations caused by manual positioning or simple tooling. Improved welding precision not only ensures a tight fit between the busbar and terminals, reducing contact resistance and ensuring the stability and efficiency of high-current transmission, but also significantly improves the assembly consistency of the busbar during mass production, reducing module performance fluctuations caused by individual differences, and supporting the large-scale, precision production of battery modules. For the operating characteristics of high-current battery modules, precise clamping and deformation-free welding provide dual protection for the structural strength and conductivity of the busbar weld joints. The joints are free from defects such as incomplete soldering, missing soldering, and deformation, effectively preventing malfunctions such as burning and breakage caused by excessive local heating during high-current transmission. This improves the working stability and lifespan of the battery module, making it suitable for applications with stringent requirements for high current and high reliability, such as new energy vehicles and large-scale energy storage. The application of a dedicated positioning fixture simplifies the positioning and clamping process before busbar welding, eliminating the need for complex manual calibration operations, reducing reliance on operator skill levels, and decreasing rework and scrap rates due to deformation or insufficient precision. While improving product quality, it effectively shortens the processing cycle of a single busbar, helping companies improve production efficiency and control manufacturing costs. Attached Figure Description

[0017] Figure 1 This is an isometric view of a precision clamping bus adapted to a high-current battery module according to the present invention.

[0018] Figure 2This is an exploded view of a precision clamping bus adapted to a high-current battery module according to the present invention.

[0019] Figure 3 This is a schematic diagram of the positioning plate installation for a precision clamping busbar adapted to a high-current battery module according to the present invention.

[0020] Figure 4 This is a schematic diagram of the installation of an adjustment plate for a precision clamping busbar adapted to a high-current battery module according to the present invention.

[0021] Figure 5 This is a cross-sectional view of an adjustment plate for a precision clamping busbar adapted to a high-current battery module according to the present invention.

[0022] Figure 6 This is a schematic diagram of the installation of the third guide plate of a precision clamping bus adapted to a high-current battery module according to the present invention.

[0023] Figure 7 This is a schematic diagram of the handle installation for a precision clamping bus adapted to a high-current battery module according to the present invention.

[0024] Figure 8 This is a cross-sectional view of an adjustment block for a precision clamping busbar adapted to a high-current battery module according to the present invention.

[0025] Figure 9 This is a schematic diagram of the installation of a U-shaped connecting plate for a precision clamping busbar adapted to a high-current battery module according to the present invention.

[0026] Figure 10 This is a schematic diagram of a rectangular frame installation for a precision clamping busbar adapted to a high-current battery module according to the present invention.

[0027] Figure 11 This is a schematic diagram of the pin installation of a precision clamping bus adapted to a high-current battery module according to the present invention.

[0028] Figure 12 This is a schematic diagram of the long pin installation of a precision clamping busbar adapted to a high-current battery module according to the present invention.

[0029] Figure 13 This is a 3D model of a precision clamping bus adapted to a high-current battery module according to the present invention.

[0030] The following are the labels in the diagram: 1-Positioning fixture, 2-Exhaust groove, 3-Copper sheet, 4-Nickel sheet, 5-Through hole, 6-Protruding locking block, 8-Positioning bolt, 9-Positioning horizontal plate, 10-Adjusting plate, 11-Adjusting block, 12-Handle, 13-Drive disc, 14-Dimension changing groove, 15-First sliding pin, 16-Incomplete thread block, 17-Cross seat, 18-Square slider, 19-First spring, 20-First guide plate, 21-Long pin, 22-First inclined groove, 23-Rectangular frame, 24-Small slider, 25-Second guide plate, 26-Second inclined groove, 27-Pin, 28-U-shaped connecting plate, 29-Long guide frame, 30-Third guide plate, 31-Third inclined groove, 32-Short pin, 33-Locking pin, 34-Locking groove, 35-Slot, 36-Side baffle, 37-Protruding stop block. Detailed Implementation

[0031] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] like Figures 1-13 As shown, the present invention provides a precision clamping bus adapted to high-current battery modules, including a positioning fixture 1. The upper end of the positioning fixture 1 is provided with a copper sheet 3 and a nickel sheet 4. The upper end of the positioning fixture 1 is provided with a plurality of protruding locking blocks 6. The copper sheet 3 is provided with a plurality of locking holes that cooperate with the protruding locking blocks 6. When the locking holes are fitted onto the protruding locking blocks 6, the copper sheet 3 can be fixedly positioned. The upper end of the positioning fixture 1 is also provided with a plurality of protruding stop blocks 37 that cooperate with the nickel sheet 4. When the nickel sheet 4 is pressed between the protruding stop blocks 37, the nickel sheet 4 can be fixedly positioned. The inner wall of the positioning fixture 1 is provided with a plurality of venting grooves 2 and a plurality of through holes 5.

[0033] like Figures 1-8As shown, the positioning fixture 1 is used to install and position the copper sheet 3 and nickel sheet 4, which are the conductive sheets of the battery module. Through the provided protruding locking blocks 6 and locking holes, when the locking holes are engaged with the protruding locking blocks 6, the copper sheet 3 can be limited and fixed, allowing it to be detachably installed on the positioning fixture 1. Through the cooperation of multiple protruding stops 37 with the nickel sheet 4, when the nickel sheet 4 is pressed between two sets of corresponding protruding stops 37, it can be fixed and positioned, and the nickel sheet 4 can be detachably installed on the positioning fixture 1. By fixing and positioning the copper sheet 3 and nickel sheet 4, busbar deformation can be prevented during welding, thereby improving welding accuracy. The multiple through holes 5 facilitate fixing... The positioning fixture 1 itself facilitates venting of the copper sheet 3 during welding. The venting grooves 2 not only accelerate heat dissipation and expel gases generated during welding, but also make it easier to remove the copper sheet 3 after welding, as its tight fit makes removal difficult. This device, with the addition of the dedicated positioning fixture 1, enables comprehensive, precise positioning and secure clamping of the busbar, limiting its displacement and deformation during welding. The positioning fixture 1 can achieve a close fit to the busbar's structural dimensions, evenly distributing clamping force and welding heat, avoiding deformation problems such as warping and displacement caused by localized stress concentration or uneven thermal expansion and contraction, ensuring that the busbar maintains its original structural accuracy and flatness after welding. The surface area meets the requirements of high-current battery modules for busbar structural stability; the positioning fixture 1 provides a stable reference positioning for busbar welding, which can accurately calibrate the relative position of the busbar, battery terminals and other components, effectively avoiding the point deviation problem caused by manual positioning or simple tooling; the improved welding accuracy not only ensures the tight fit between the busbar and the terminals, reduces contact resistance, and ensures the stability and efficiency of high current transmission, but also significantly improves the assembly consistency of the busbar during mass production, reduces module performance fluctuations caused by individual differences, and provides support for the large-scale and precision production of battery modules; for the working characteristics of high-current battery modules, precise clamping and deformation-free welding ensure that the busbar welding joints are stable and accurate. The structural strength and conductivity are both guaranteed; there are no hidden dangers of incomplete welding, missing welding, or deformation at the weld joints, which can effectively avoid failures such as burning and breakage caused by excessive local heating during high current transmission, improve the working stability and service life of the battery module, and make it suitable for application scenarios with stringent requirements for high current and high reliability, such as new energy vehicles and large-scale energy storage; the application of the dedicated positioning fixture 1 simplifies the positioning and clamping process before busbar welding, eliminating the need for complicated manual calibration operations, reducing the dependence on the skill level of operators, and reducing the rework and scrap rate caused by deformation and insufficient precision; while improving product quality, it effectively shortens the processing cycle of a single busbar, helping enterprises improve production efficiency and control manufacturing costs.

[0034] The lower end of the positioning fixture 1 is provided with a clamping mechanism, which includes two positioning horizontal plates 9. The inner end faces of the two positioning horizontal plates 9 are provided with two movable adjusting plates 10. The inner walls of the adjusting plates 10 are provided with movable adjusting blocks 11. Each adjusting block 11 is provided with a clamp. Each adjusting block 11 is provided with a positioning component. When the positioning component is opened, it can fix the position of the adjusting plates 10 and the adjusting blocks 11. Each adjusting block 11 is also provided with a rotatable handle 12. When the handle 12 is rotated, it can move the clamp outward and close the positioning component.

[0035] like Figures 3-8As shown, the clamping mechanism facilitates the quick fixation of the positioning fixture 1 onto the welding machine. The positioning horizontal plate 9 is fixed to the lower surface of the positioning fixture 1. The adjusting plate 10 can move left and right on the inner end face of the positioning horizontal plate 9, and the adjusting block 11 can move back and forth on the inner wall of the adjusting plate 10. By controlling the left and right movement of the adjusting plate 10 and the back and forth movement of the adjusting block 11, the position of the fixture can be adjusted. The fixture can be clamped and fixed onto the positioning bolt 8 of the welding machine, thereby fixing the positioning fixture 1 onto the welding machine for processing. The positioning component can fix the positions of the adjusting block 11 and the adjusting plate 10 in real time. That is, after adjusting the corresponding fixture position according to the position of the positioning bolt 8 of the welding machine, the positioning component opens, which can fix the adjusting plate 10 and the adjusting block 11 onto the welding machine for processing. The position of segment 11 is fixed, thus fixing the position of the clamp. A rotatable handle 12 allows the clamp to move outwards to open and the positioning component to close when the handle is rotated. In this position, the clamp can be fitted onto the corresponding positioning bolt 8. When the positioning component is closed, the clamp can move back and forth or left and right at the lower end of the positioning fixture 1 to adjust its position. In use, by driving the handle 12, the clamp is in the open state and the positioning component is in the closed state. Then, driving the handle 12 moves the clamp back and forth or left and right, adjusting its position so that it is on the outer surface of the positioning bolt 8. Releasing the handle 12 allows the clamp to close inwards, thus clamping and fixing the positioning bolt 8. The positioning component can be opened to fix the positions of the adjusting plate 10 and the adjusting block 11, thereby quickly fixing the positioning fixture 1 onto the welding machine. The clamping mechanism achieves clamping and fixing of the positioning fixture 1 to the welding machine, possessing multiple technical advantages such as convenient operation, high clamping efficiency, flexible adjustment, stable fixation, and strong versatility. The clamping process is greatly simplified. The positioning horizontal plate 9, the left-right movable adjusting plate 10, and the front-back movable adjusting block 11 form a two-dimensional adjustment structure, enabling flexible horizontal position adjustment of the fixture. It can accurately adapt to the positioning bolts 8 in different layout positions on the welding machine, eliminating the need for special fixtures for different welding machines, significantly improving the versatility and adaptability of the positioning fixture 1. Operation is achieved through integrated control via a rotatable handle 1. The opening and closing of the fixture and the opening and closing of the positioning component can be completed simultaneously without the need to operate multiple parts separately. The position adjustment and clamping process does not require additional auxiliary tools, and the manual operation difficulty is low. It effectively shortens the time spent on clamping, adjusting and disassembling the positioning fixture 1, and realizes the rapid fixation and disassembly of the positioning fixture 1 on the welding machine. The clamping and fixing has high stability and reliability. The fixture can be directly clamped and fixed on the positioning bolt 8 of the welding machine. In conjunction with the positioning component, the position of the adjusting plate 10 and the adjusting block 11 is locked in real time, forming a double fixing effect on the positioning fixture 1. It can effectively prevent the positioning fixture 1 from moving forward, backward or left, right during the welding process, ensuring the clamping accuracy of the positioning fixture 1, and thus improving the overall accuracy of the welding process.Fourth, the overall structure features smooth operational transitions. The linkage design between adjustment and fixing allows for immediate locking after the fixture position is adjusted. This ensures a high degree of continuity in the clamping process, effectively reducing auxiliary welding steps and improving overall welding production efficiency.

[0036] Each adjusting block 11 has a cross seat 17 on its inner wall, and multiple movable square sliders 18 are slidably connected to the inner wall of each cross seat 17. Each clamp includes multiple incomplete threaded blocks 16, and each incomplete threaded block 16 is installed on the corresponding square slider 18.

[0037] like Figures 8-9 As shown, the cross seat 17 is fixed to the inner wall of the adjusting block 11. The cross seat 17 serves as a mounting support for the square slider 18 and the incomplete thread block 16. The square slider 18 can move inward or outward on the inner wall of the cross seat 17, which can drive the incomplete thread block 16 to move inward or outward. When the incomplete thread block 16 moves inward, it can engage with the positioning bolt 8, thereby fixing the clamp and positioning fixture 1. When the incomplete thread block 16 moves outward, it can disengage from the positioning bolt 8, at which point the positioning fixture 1 can be removed.

[0038] The upper end of each cross seat 17 is rotatably connected to a drive disk 13, and each handle 12 is fixedly connected to the outer surface of the corresponding drive disk 13. The upper surface of each square slider 18 is fixedly connected to a first sliding pin 15, and each incomplete threaded block 16 is fixedly connected to the corresponding first sliding pin 15. The inner wall of each drive disk 13 is provided with multiple variable diameter grooves 14 that cooperate with the first sliding pin 15.

[0039] like Figures 7-9 As shown, a rotating shaft is fixed to the inner wall of the center of the drive disk 13. The rotating shaft is rotatably connected to the inner wall of the cross seat 17, which is equivalent to the drive disk 13 being rotatably connected to the upper end of the cross seat 17. The drive disk 13 can be rotated by the drive handle 12. When the drive disk 13 rotates, the first sliding pin 15, the square slider 18, and the incomplete thread block 16 can be moved inward or outward by the engagement of the first sliding pin 15 and the variable diameter groove 14, thereby controlling the opening and closing of the clamp.

[0040] The inner wall of each cross seat 17 is provided with multiple first springs 19 that cooperate with the square slider 18.

[0041] like Figure 10 As shown, the inner ends of the first spring 19 are all fixed to the inner wall of the cross seat 17, and the outer ends of the first spring 19 are all fixed to the square slider 18. The first spring 19 always has an inward driving force on the square slider 18, so that the square slider 18, the first sliding pin 15, and the incomplete threaded block 16 are at the innermost end under normal conditions, that is, the clamp is in the closed state under normal conditions, that is, the clamp can stably clamp and engage with the positioning bolt 8 under normal conditions.

[0042] Each positioning component includes two pins 27 that are slidably connected to the adjusting block 11. Multiple slots 35 that cooperate with the locking pins 33 are provided on the inner walls of both sides of the adjusting plate 10. The adjusting blocks 11 are slidably connected to the corresponding inner walls of the adjusting plate 10.

[0043] like Figure 5 , Figure 9 As shown, the adjusting blocks 11 are slidably connected to the inner wall of the adjusting plate 10, and the pins 27 are slidably connected to the inner wall of the adjusting blocks 11. When the pins 27 are engaged with the slots 35, the position of the adjusting blocks 11 and the clamp can be fixed. When the pins 27 are disengaged from the slots 35, the adjusting blocks 11 can slide back and forth on the inner wall of the adjusting plate 10, that is, adjust the position of the clamp.

[0044] The inner walls of both ends of the adjusting block 11 are provided with movable long pins 21, and the inner end faces of the two pins 27 are fixed with second guide plates 25. The inner walls of the second guide plates 25 are provided with second inclined grooves 26 that cooperate with the long pins 21.

[0045] like Figures 11-12 As shown, the long pin 21 can slide up and down the inner wall of the adjusting block 11. When the long pin 21 moves up and down, it can drive the two pins 27 to move inward or outward by engaging with the second inclined groove 26. When moving inward, it can disengage from the slot 35. When moving outward, it can engage with the slot 35. That is, it controls the pins 27 to engage or disengage with the slot 35.

[0046] The inner wall of each adjusting block 11 is fixedly connected to multiple rectangular frames 23, and the inner wall of each rectangular frame 23 is slidably connected to small sliders 24. Long pins 21 are fixedly connected to the inner end faces of the corresponding two small sliders 24. The interior of each adjusting block 11 is provided with two movable first guide plates 20, and the inner wall of each first guide plate 20 is provided with a first inclined groove 22 that cooperates with the long pin 21.

[0047] like Figures 10-11 As shown, the small slider 24 can slide up and down on the inner wall of the rectangular frame 23. Under the limitation of the rectangular frame 23 and the small slider 24, the long pin 21 can only move up and down. The first guide plate 20 is fixed to the lower surface of the two corresponding square sliders 18. When the two square sliders 18 move inward or outward, they can drive the first guide plate 20 to move inward or outward. When the first guide plate 20 moves outward, under the engagement of the first inclined groove 22 and the long pin 21, it can drive the long pin 21 to move upward. Similarly, when the first guide plate 20 moves inward, it can drive the long pin 21 to move downward. That is, when the clamp is opened, the long pin 21 moves upward, causing the two pins 27 to move inward, that is, the pins 27 disengage from the slot 35. At this time, the adjusting block 11 can move back and forth.

[0048] The inner wall of the adjusting block 11 is provided with a movable long guide frame 29. Two third guide plates 30 are fixedly connected to the two end faces of the long guide frame 29. Side baffles 36 are fixedly connected to the inner walls of both ends of the adjusting plate 10. The third guide plates 30 are slidably connected to the side baffles 36. The inner wall of the side baffles 36 is slidably connected with a locking pin 33. The inner end face of the positioning horizontal plate 9 is provided with multiple slots 34 that cooperate with the locking pins 33. The inner end of the two locking pins 33 is provided with short pins 32. The inner wall of the third guide plate 30 is provided with a third inclined groove 31 that cooperates with the short pins 32.

[0049] like Figures 4-6 As shown, the adjusting plate 10 is slidably connected to the positioning fixture 1 from left to right, and the third guide plate 30 is slidably connected to the inner wall of the side baffle 36 from top to bottom. That is, the limiting long guide 29 can only move up and down on the inner wall of the adjusting plate 10. The inner wall of the adjusting block 11 has a rectangular through hole 5, and the long guide 29 can move up and down on the inner wall of the rectangular through hole 5. The adjusting block 11 can also move back and forth on the inner wall of the adjusting plate 10. The movements of the two do not affect each other. With the engagement of the locking pin 33 and the locking groove 34, the position of the adjusting plate 10 can be fixed. That is, the limit adjustment plate 10 moves; when the long guide frame 29 moves upward, it can drive the third guide plate 30 to move upward. When the third guide plate 30 moves upward, it can drive the locking pin 33 to move inward through the engagement of the third inclined groove 31 and the short pin 32. When the locking pin 33 moves inward, it can disengage from the locking groove 34. At this time, the adjustment plate 10 can move left and right; similarly, when the long guide frame 29 moves downward, it can drive the locking pin 33 to engage with the locking groove 34. That is, at this time, the adjustment plate 10 can move left and right.

[0050] A U-shaped connecting plate 28 is fixed to the outer end face of each of the two small sliders 24. The inner wall of the U-shaped connecting plate 28 is provided with an insertion hole that matches the long guide frame 29.

[0051] like Figures 9-10As shown, the long guide frame 29 is installed on the inner wall of the slot 35. When the U-shaped connecting plate 28 moves up and down, it can drive the long guide frame 29 to move up and down. When the adjusting block 11 and the U-shaped connecting plate 28 move back and forth, the U-shaped connecting plate 28 can slide back and forth on the outer surface of the long guide frame 29, that is, it always maintains a connection with the long guide frame 29. That is, when the long pin 21 and the small slider 24 move up and down, they can drive the long guide frame 29 to move up and down, thus controlling the engagement or disengagement of the locking pin 33 and the slot 34. In use, by rotating the drive handle 12, multiple incomplete threaded blocks 16 can be moved outward, that is, the clamp opens, and the long pin 21 can be driven to move upward, that is, the corresponding... Two pins 27 move inward to disengage from the slot 35, and two latches 33 move inward to disengage from the slot 34. At this time, the positioning assembly is closed, which allows for multi-degree-of-freedom adjustment of the fixture position, so that the fixture clamps and fixes the corresponding positioning bolt 8. After releasing the handle 12, under the elastic force of the first spring 19, the square slider 18 can move inward to reset, that is, the corresponding fixture closes inward to clamp and fix the positioning bolt 8, and the corresponding pins 27 move outward to engage with the slot 35 again, and the latches 33 move outward to engage with the slot 34 again. At this time, the fixture is fixed and the positioning fixture 1 is fixed, which allows for quick assembly and disassembly of the positioning fixture 1.

[0052] In use, this invention uses a clamping mechanism to quickly fix the positioning fixture 1. When the locking hole is engaged with the protruding locking block 6, the copper sheet 3 is limited and fixed, allowing it to be detachably mounted on the positioning fixture 1. When the nickel sheet 4 is pressed between two sets of corresponding protruding blocks 37, it is fixed and positioned, and can be detachably mounted on the positioning fixture 1. By fixing and positioning the copper sheet 3 and the nickel sheet 4, deformation of the busbar can be prevented during welding, thereby improving welding accuracy. The multiple through holes 5 facilitate fixing the positioning fixture 1 itself and allow the copper sheet 3 to vent during welding. The venting groove 2 facilitates venting during welding. During processing, it can accelerate heat dissipation and expel gases generated by high-temperature welding, and make it easier to remove the copper sheet 3 after welding, as the copper sheet 3 is difficult to remove when it is tightly attached. This device, by adding a special positioning fixture 1, can perform all-round, precise positioning and firm clamping of the busbar, limiting the displacement and deformation space of the busbar during the welding process from the source. The positioning fixture 1 can achieve a close fit and fixation according to the structural dimensions of the busbar, evenly distributing the clamping force and welding heat, avoiding deformation problems such as warping and displacement caused by local force concentration or uneven thermal expansion and contraction, ensuring that the busbar maintains its original structural accuracy and flatness after welding, and meeting the requirements of high-current battery modules for the structural stability of the busbar. Positioning fixture 1 provides a stable reference positioning for busbar welding, enabling precise calibration of the relative positions of the busbar, battery terminals, and other components, effectively avoiding point deviations caused by manual positioning or simple tooling. The improved welding precision not only ensures a tight fit between the busbar and the terminals, reducing contact resistance and ensuring the stability and efficiency of high-current transmission, but also significantly improves the assembly consistency of the busbar during mass production, reducing module performance fluctuations caused by individual differences, and supporting the large-scale and precision production of battery modules. For the working characteristics of high-current battery modules, precise clamping and deformation-free welding ensure both structural strength and conductivity at the busbar weld joint. The system ensures that there are no hidden dangers of incomplete welding, missing welding, or deformation at the weld joints, effectively avoiding faults such as burning and breakage caused by excessive local heating during high current transmission. This improves the working stability and service life of the battery module, making it suitable for applications with stringent requirements for high current and high reliability, such as new energy vehicles and large-scale energy storage. The application of the dedicated positioning fixture 1 simplifies the positioning and clamping process before busbar welding, eliminating the need for complex manual calibration operations, reducing reliance on the skill level of operators, and reducing rework and scrap rates caused by deformation and insufficient precision. While improving product quality, it effectively shortens the processing cycle of a single busbar, helping companies improve production efficiency and control manufacturing costs.

Claims

1. A precision clamping bus adapted to a high-current battery module, comprising a positioning fixture (1), characterized in that: The positioning fixture (1) has a copper sheet (3) and a nickel sheet (4) at its upper end. The positioning fixture (1) has multiple protruding blocks (6) at its upper end. The copper sheet (3) has multiple holes that cooperate with the protruding blocks (6). When the holes are fitted onto the protruding blocks (6), the copper sheet (3) can be fixedly positioned. The positioning fixture (1) also has multiple protruding blocks (37) that cooperate with the nickel sheet (4). When the nickel sheet (4) is pressed between the protruding blocks (37), the nickel sheet (4) can be fixedly positioned. The positioning fixture (1) has multiple venting grooves (2) on its inner wall and multiple through holes (5) on its inner wall.

2. The precision clamping bus for high-current battery modules as described in claim 1, characterized in that: The positioning fixture (1) is provided with a clamping mechanism at its lower end. The clamping mechanism includes two positioning horizontal plates (9). Two movable adjustment plates (10) are provided on the inner end face of the two positioning horizontal plates (9). Movable adjustment blocks (11) are provided on the inner wall of each adjustment plate (10). Clamps are provided on each adjustment block (11). Positioning components are provided inside each adjustment block (11). When the positioning components are opened, the positions of the adjustment plates (10) and adjustment blocks (11) can be fixed. A rotatable handle (12) is also provided on each adjustment block (11). When the handle (12) is rotated, the clamps can be moved outward and the positioning components can be closed.

3. The precision clamping bus for high-current battery modules as described in claim 2, characterized in that: The inner wall of each adjustment block (11) is provided with a cross seat (17), and the inner wall of each cross seat (17) is slidably connected with multiple movable square sliders (18). Each clamp includes multiple incomplete threaded blocks (16), and the incomplete threaded blocks (16) are all installed on the corresponding square sliders (18).

4. The precision clamping bus for high-current battery modules as described in claim 3, characterized in that: The inner wall of each adjustment block (11) is provided with a cross seat (17), and the inner wall of each cross seat (17) is slidably connected with multiple movable square sliders (18). Each clamp includes multiple incomplete threaded blocks (16), and the incomplete threaded blocks (16) are all installed on the corresponding square sliders (18).

5. A precision clamping bus adapted to a high-current battery module as described in claim 3, characterized in that: The inner wall of each cross seat (17) is provided with multiple first springs (19) that cooperate with the square slider (18).

6. The precision clamping bus for high-current battery modules as described in claim 2, characterized in that: Each positioning component includes two pins (27) that are slidably connected to the adjusting block (11). Multiple slots (35) that cooperate with the locking pins (33) are provided on the inner walls of both sides of the adjusting plate (10). The adjusting blocks (11) are slidably connected to the inner walls of the corresponding adjusting plates (10).

7. A precision clamping bus adapted to a high-current battery module as described in claim 6, characterized in that: The inner walls of both ends of the adjusting block (11) are provided with movable long pins (21), and the inner end faces of the two pins (27) are fixed with second guide plates (25). The inner walls of the second guide plates (25) are provided with second inclined grooves (26) that cooperate with the long pins (21).

8. A precision clamping bus adapted to a high-current battery module as described in claim 7, characterized in that: The inner wall of each adjusting block (11) is fixed with multiple rectangular frames (23), and the inner wall of each rectangular frame (23) is slidably connected with small sliders (24). The long pins (21) are fixed on the inner end faces of the corresponding two small sliders (24). The adjusting block (11) is provided with two movable first guide plates (20), and the inner wall of each first guide plate (20) is provided with a first inclined groove (22) that cooperates with the long pins (21).

9. A precision clamping bus adapted to a high-current battery module as described in claim 8, characterized in that: The inner wall of the adjusting block (11) is provided with a movable long guide (29). Two third guide plates (30) are fixedly connected to the two end faces of the long guide (29). Side baffles (36) are fixedly connected to the inner walls of both ends of the adjusting plate (10). The third guide plates (30) are slidably connected to the side baffles (36). The inner wall of the side baffles (36) is slidably connected with a locking pin (33). The inner end face of the positioning horizontal plate (9) is provided with multiple slots (34) that cooperate with the locking pins (33). The inner ends of the two locking pins (33) are provided with short pins (32). The inner wall of the third guide plate (30) is provided with a third inclined groove (31) that cooperates with the short pins (32).

10. A precision clamping bus adapted to a high-current battery module as described in claim 9, characterized in that: A U-shaped connecting plate (28) is fixed to the outer end face of each of the two small sliders (24), and the inner wall of the U-shaped connecting plate (28) is provided with an insertion hole that matches the long guide frame (29).

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