A kind of cold welding detection equipment for lithium battery processing

Abstract

The present invention relates to the technical field of virtual soldering detection of lithium batteries, and specifically relates to a virtual soldering detection device for lithium battery processing, including a support table. A detection box is fixed on the top surface of the support table. An intensity detection module is fixed inside the detection box. A shaft rod is rotatably arranged inside the U-shaped frame. A plurality of wire winding wheels are evenly fixed on the outer side of the shaft rod. A fishing line rope is wound and fixed on the outer side of the wire winding wheel. A counterweight ball is fixed at the bottom end of the fishing line rope. In the present invention, the intensity detection module rotates the plurality of wire winding wheels to release the fishing line rope, so that the counterweight ball drives the fishing line rope to penetrate between the connecting piece and the battery pack. The driving mechanism drives the U-shaped frame to move the fishing line rope in a direction away from the welding position between the connecting piece and the pole. If the fishing line rope passes through the welding position, it indicates that the connecting piece and the pole are separated and have a virtual soldering phenomenon, which is convenient for the user to intuitively observe the arrangement of the fishing line rope at the welding position to determine whether there is a separation and virtual soldering at the welding position.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery cold solder joint detection, in particular to a cold solder joint detection device for lithium battery processing. Background Art

[0002] The lithium-ion battery pack is composed of multiple lithium-ion batteries spliced ​​together. The specific processing process is to use epoxy boards to separate and neatly arrange multiple lithium-ion batteries, and then use fiber tape to tie them to the outside of the battery pack to form multiple lithium-ion battery blocks into a whole. Then, place connecting pieces on the battery poles on the top surfaces of adjacent lithium-ion battery blocks, and then use welding equipment such as laser spot welding machines to weld the two ends of the connecting pieces to the corresponding poles. Finally, place the welded battery pack under a CCD camera for cold welding detection. The CCD camera uses a photosensitive element to capture the image of the weld area, and uses image processing software to filter, detect edges, extract features, and other operations on the image to accurately identify whether there is a cold weld at the welding position between the connecting piece and the pole.

[0003] At present, the cold solder joint detection equipment equipped with CCD cameras mainly detects whether there are cold solder joints, cracks, unfused joints and other cold solder joints at the welding positions of the connecting pieces and the poles through image acquisition from a visual perspective. However, this type of cold solder joint detection equipment cannot indirectly and fully expose the cold solder joint phenomenon of the connecting piece and the pole being separated at the welding position during the detection process, which is not conducive to the user's intuitive observation of the cold solder joint problem. As a result, the traditional cold solder joint detection equipment is overly dependent on the detection results of the CCD camera. Under low light conditions, the image may be too dark, resulting in loss of details. Under high light conditions, the image may be overexposed, blurring the details of the solder joints, thereby affecting the accuracy of the cold solder joint detection results. Thicker connecting pieces or connecting pieces with a larger bearing area generally require higher welding strength to ensure the firmness of the welding position during welding, while thinner or smaller connecting pieces may meet the requirements at lower welding strengths. However, most cold solder joint detection equipment is not easy to detect whether the welding strength between the connecting piece and the pole meets the welding requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a cold solder joint detection device for lithium battery processing to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A cold solder joint detection device for lithium battery processing, comprising:

[0007] A support platform, a detection box is fixed on the top surface of the support platform;

[0008] The camera detection module is used to collect images of the welding position. The camera detection module includes a first guide rail fixed to the detection box. A transmission rod is screwed and slid inside the first guide rail. CCD cameras are fixed at both ends of the transmission rod.

[0009] The strength detection module is used to detect whether the connecting piece is separated from the pole column. The strength detection module includes two second guide rails both fixedly connected to the detection box. A C-shaped frame is slidably clamped between the bottoms of the two second guide rails. A shaft rod is rotatably arranged inside the C-shaped frame. A plurality of winding wheels are evenly fixed on the outer side of the shaft rod. A fishing line rope is wound and fixed on the outer side of the winding wheel. A counterweight ball is fixed at the bottom end of the fishing line rope.

[0010] The driving mechanism is arranged at the inner top of the detection box and is used to drive the C-shaped frame to move the entire strength detection module.

[0011] The guiding mechanism is fixed on one side of the first guide rail and is used to prevent the counterweight ball from swaying during the falling process.

[0012] The counterweight mechanism is fixed at the inner bottom of the detection box and is used to increase the weight of the counterweight ball.

[0013] The conveying mechanism is used to convey the battery pack to be detected for false soldering into the detection box for detection.

[0014] Furthermore, a first lead screw rotatably connected to the transmission rod is rotatably connected inside the first guide rail. A first motor for driving the first lead screw to rotate is fixed at one end of the first guide rail. A rectangular hole is formed through one side of the detection box. A glass plate is fixedly installed inside the rectangular hole.

[0015] Furthermore, connecting shafts are fixed at both ends of the top surface of the C-shaped frame. Rollers are rotatably arranged at the tops of the connecting shafts. A sliding groove slidably connected to the connecting shaft is formed at the bottom surface of the second guide rail. A clamping groove rollingly connected to the roller is formed at the inner top of the sliding groove.

[0016] Furthermore, a second motor for driving the shaft rod to rotate is fixed at one end of the C-shaped frame. The fishing line rope is red. A notch is formed at the bottom surface of the counterweight ball. A magnet block is fixedly embedded inside the notch.

[0017] Furthermore, the driving mechanism includes:

[0018] A second lead screw rotatably connected to the inner top of the detection box. A moving block slidably connected to the detection box is screwed on the outer side of the second lead screw. A square tube is fixed at the bottom end of the moving block.

[0019] A sleeve is sleeved and fixed on the outer side of the C-shaped frame. A square rod slidably connected to the square tube is fixed on the outer side of the sleeve.

[0020] Furthermore, the guiding mechanism includes:

[0021] Two electric push rods, which are fixedly connected to the first guide rail;

[0022] A support plate, which is fixedly connected to the output ends of the two electric push rods. A plurality of first arc-shaped plates are fixedly arranged at equal intervals on one side of the support plate;

[0023] A cross beam, which is fixedly connected to the plurality of first arc-shaped plates. A plurality of second arc-shaped plates are fixedly arranged at equal intervals on one side of the cross beam.

[0024] Furthermore, the counterweight mechanism includes:

[0025] A bearing plate, which is fixedly connected to the inner bottom surface of the detection box. An electromagnet is fixedly arranged on the top surface of the bearing plate;

[0026] A plurality of fixing rings are fixedly arranged at equal intervals on the top surface of the electromagnet. A support tube is detachably screwed inside the fixing ring. A ball receiving hopper is fixedly connected and communicated at the top of the support tube;

[0027] A plurality of iron columns are respectively placed inside the support tubes at corresponding positions.

[0028] Furthermore, the conveying mechanism includes two bottom plates. Two support seats and U-shaped columns are fixedly arranged on the top surfaces of the bottom plates. A belt pulley is rotatably arranged between the two support seats. A conveyor belt is driven between the two belt pulleys.

[0029] Furthermore, a first guide rod is fixedly arranged between the tops of the two support seats. Second guide rods are fixedly arranged on the tops of the other two support seats. A support plate is fixedly arranged between the two U-shaped columns. The support plate is arranged below the conveyor belt and is used for receiving the battery pack.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. By placing the battery pack on its side on the conveyor belt and transferring it to the inside of the detection box with the help of the conveyor belt, the second motor drives the shaft rod to rotate so that the multiple winding wheels rotate to release the fishing line. The fishing line falls vertically under the gravity of the counterweight ball. The counterweight ball passes through the bending position in the middle of the connecting piece to make the fishing line inserted between the connecting piece and the battery pack. The driving mechanism drives the yoke with the multiple winding wheels on the shaft rod to move along the guide rail 2 away from the battery pack, thereby moving the fishing line to the position between the connecting piece and the pole. The counterweight ball causes the moving fishing line to maintain In the vertical state, if there is a separated cold solder joint between the end of the connecting piece and the pole, the fishing line can pass through the welding position between the connecting piece and the pole. If the connecting piece and the pole are in a firmly welded state, the fishing line cannot pass through the welding position. Part of the fishing line above the welding position bends in the moving direction of the winding wheel, while part of the fishing line below the welding position is still arranged vertically. This allows users to visually observe the arrangement of the fishing line at the welding position through the glass plate on the detection box to determine whether there is a separated cold solder joint at the welding position.

[0032] 2. The motor drives the lead screw to rotate so that the transmission rod slides along the guide rail, and then the transmission rod drives two CCD cameras to move back and forth horizontally along the guide rail. The CCD camera faces the connecting piece on the battery pack. As the CCD camera moves to different positions, it is convenient to collect images of welding points of different connecting pieces on the battery pack, so as to visually detect whether there are welds, cracks, unfused joints and other cold soldering phenomena at the welding positions of the connecting pieces and the poles. At the same time, the CCD camera can record the position status of the fishing line. By combining the observation of whether the fishing line passes through the welding position to indirectly expose the cold soldering problem with the detection of whether there is a cold soldering at the welding position from the perspective of mechanical vision, it is beneficial to improve the accuracy of the cold soldering detection results at the welding position.

[0033] 3. Release the fishing line by rotating so that the fishing line and the weight ball passing through the middle of the connecting piece continue to move downward, so that the weight ball passes through the ball receiving bucket and the support tube, and the magnet block on the bottom of the weight ball adsorbs and fixes the iron column, and the fishing line moves out of the ball receiving bucket with the weight ball and the iron column. At this time, the bottom of the fishing line is subjected to a heavier traction force. When the driving mechanism drives the winding wheel with the fishing line to move in the direction of passing through the welding position, the additional gravity of the iron column makes the force of the fishing line to divide the connecting piece and the pole greater. If the connecting piece and the pole are only slightly welded, the dividing action of the fishing line will make the fishing line move to the position between the connecting piece and the pole or pass through the welding position, so as to detect whether the connecting piece is firmly welded to the pole;

[0034] Iron columns of different weights can be pre-placed inside the support tube, so that the fishing line rope will be subjected to a greater downward traction force in the later stage, and then the fishing line rope can try to pass through the welding position with a greater extrusion force. For some thicker connecting pieces, heavier iron columns can be adsorbed and fixed below the counterweight ball to increase the force of the fishing line rope to separate the welding position. For some thinner connecting pieces, lighter iron columns can be adsorbed and fixed below the counterweight ball or no iron column is adsorbed to reduce the force of the fishing line rope to separate the welding position, so as to realize reflecting whether the welding strength of different thickness connecting pieces meets the use requirements of the battery pack by whether the fishing line rope passes through or is embedded in the welding position.

[0035] 4. By setting the two ends of the second guide rail in an inclined form and the middle part of the second guide rail in a long straight form, when the C-shaped frame moves along the long straight part of the second guide rail, the fishing line rope can move from the bent part of the connecting piece to the outside of the pole. When the C-shaped frame moves along the inclined part of the second guide rail, the fishing line rope can move towards the welding position where the pole contacts the connecting piece, so that the fishing line rope moves precisely towards the welding position, effectively preventing the fishing line rope from moving to the end of the pole close to the battery pack. The driving mechanism can successively drive the fishing line rope passing through the connecting piece to move towards the two ends of the second guide rail, so that the fishing line rope can successively move towards the welding positions at both ends of the connecting piece, facilitating the detection of the virtual welding at both ends of the connecting piece and achieving the effect of comprehensively detecting multiple welding positions on the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0037] Figure 2 is a schematic diagram of the overall structure of the present invention Figure 2 ;

[0038] Figure 3 is a schematic diagram of the conveying mechanism and the battery pack structure in the present invention;

[0039] Figure 4 is a schematic diagram of the internal structure of the detection box in the present invention;

[0040] Figure 5 is a schematic diagram of the camera detection module structure in the present invention;

[0041] Figure 6 is a schematic diagram of the strength detection module and the guiding mechanism structure in the present invention;

[0042] Figure 7 is a schematic diagram of the strength detection module and the battery pack structure in the present invention;

[0043] Figure 8 is a schematic diagram of the detection box and the driving mechanism structure in the present invention;

[0044] Fig. 9It is a schematic structural diagram of the counterweight mechanism in the present invention;

[0045] Fig.10 It is a schematic structural diagram of the counterweight ball in the present invention.

[0046] In the figure: 100, support platform; 110, detection box; 200, camera detection module; 210, guide rail 1; 211, lead screw 1; 212, motor 1; 220, transmission rod; 230, CCD camera; 300, strength detection module; 310, guide rail 2; 311, card slot; 320, C-shaped frame; 321, connecting shaft; 322, shaft rod; 323, motor 2; 330, winding wheel; 331, fishing line rope; 340, counterweight ball; 341, magnet block; 400, drive mechanism; 410, lead screw 2; 411, square tube; 420, sleeve; 430, motor 3; 500, guiding mechanism; 510, electric push rod; 520, support plate; 521, arc plate 1; 530, cross beam; 531, arc plate 2; 600, counterweight mechanism; 610, bearing plate; 611, electromagnet; 620, fixing ring; 621, support tube; 630, iron column; 700, conveying mechanism; 710, bottom plate; 720, support seat; 721, guide rod 1; 722, guide rod 2; 723, motor 4; 730, C-shaped support; 740, conveyor belt; 800, battery pack body; 810, lithium-ion battery block; 820, fiber tape; 830, connecting piece; 840, pole column. Specific embodiments

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Example 1, please refer to Figure 1-10, in the embodiment of the present invention, a virtual soldering detection device for lithium battery processing includes a support table 100. A detection box 110 is fixed on the top surface of the support table 100. Inside the detection box 110, a camera detection module 200 is fixed for collecting images of welding positions. The camera detection module 200 includes a first guide rail 210 fixed to the detection box 110. A transmission rod 220 is screwed and slid in the first guide rail 210. CCD cameras 230 are fixed at both ends of the transmission rod 220. Inside the detection box 110, a strength detection module 300 is fixed for detecting whether the connecting piece 830 is separated from the pole column 840. The strength detection module 300 includes two second guide rails 310 both fixedly connected to the detection box 110. A U-shaped frame 320 is slidably clamped between the bottoms of the two second guide rails 310. A shaft rod 322 is rotatably arranged inside the U-shaped frame 320. A plurality of wire winding wheels 330 are evenly fixed on the outer side of the shaft rod 322. A fishing line rope 331 is wound and fixed on the outer side of the wire winding wheel 330. A counterweight ball 340 is fixed at the bottom end of the fishing line rope 331. A driving mechanism 400 is arranged at the inner top of the detection box 110 for driving the U-shaped frame 320 to drive the entire strength detection module 300 to move positions. A guiding mechanism 500 is arranged on one side of the first guide rail 210 for preventing the counterweight ball 340 from shaking during the falling process. A counterweight mechanism 600 is fixed at the inner bottom of the detection box 110 for increasing the weight of the counterweight ball 340. A conveying mechanism 700 is arranged through the middle of the detection box 110 for conveying the battery pack to be detected for virtual soldering into the detection box 110 for detection.

[0049] Specifically, by placing the battery pack sideways inside the detection box 110, the shaft rod 322 on the strength detection module 300 drives the plurality of wire winding wheels 330 to rotate and release the fishing line rope 331, so that the counterweight ball 340 at the bottom of the fishing line rope 331 drives the fishing line rope 331 to penetrate between the connecting piece 830 and the battery pack. The driving mechanism 400 drives the U-shaped frame 320 to drive the shaft rod 322 to move along the second guide rail 310, so that the fishing line rope 331 moves in a direction away from the welding position of the connecting piece 830 and the pole column 840. During the movement of the fishing line rope 331, it will try to pass through the welding position. If the fishing line rope 331 passes through the welding position, it indicates that the connecting piece 830 and the pole column 840 have a separation and virtual soldering phenomenon, which is convenient for users to intuitively observe the arrangement of the fishing line rope 331 at the welding position to judge whether there is a separation and virtual soldering at the welding position. At the same time, the CCD camera 230 can move along the welding position direction to capture images, which is convenient for detecting whether there are virtual soldering phenomena such as weld seams, cracks, and lack of fusion at the welding position of the connecting piece 830 and the pole column 840 from the visual aspect. By combining the indirect exposure of the virtual soldering problem by observing whether the fishing line rope 331 passes through the welding position with the detection of whether there is virtual soldering at the welding position by the CCD camera 230, it is beneficial to improve the accuracy of the virtual soldering detection result at the welding position.

[0050] Such as Figure 1 And Figure 5As shown, in this embodiment, a lead screw 211 that is rotationally connected to a transmission rod 220 is rotatably connected inside a first guide rail 210. One end of the first guide rail 210 is fixed with a first motor 212 for driving the lead screw 211 to rotate. A rectangular hole is formed through one side of the detection box 110, and a glass plate is fixedly installed inside the rectangular hole.

[0051] In this embodiment, the first motor 212 drives the lead screw 211 to rotate forward and backward, causing the transmission rod 220 that is threadedly connected to the lead screw 211 to drive the CCD camera 230 to move back and forth along the first guide rail 210. The CCD camera 230 can collect images of different welding positions on the battery pack. Operations such as filtering, edge detection, and feature extraction are performed on the images through image processing software to accurately identify whether there is a lack of fusion at the welding position between the connecting piece 830 and the pole 840. The lack of fusion detection by the CCD camera 230 is a prior art, and the specific content will not be elaborated in detail. The glass plate on the detection box 110 facilitates the user to directly observe the position of the fishing line rope 331 and the welding point. By judging whether the fishing line rope 331 passes through the welding position, the welding separation phenomenon in the lack of fusion can be indirectly judged.

[0052] As Figure 8 shown, in this embodiment, connecting shafts 321 are fixed at both ends of the top surface of the U-shaped frame 320. Rollers are rotated at the tops of the connecting shafts 321. A chute that is slidably connected to the connecting shaft 321 is formed on the bottom surface of the second guide rail 310, and a card slot 311 that is rollingly connected to the roller is formed at the inner top of the chute.

[0053] In this embodiment, when the driving mechanism 400 drives the U-shaped frame 320 to move along the second guide rail 310 at the bottom of the second guide rail 310, the connecting shafts 321 on the U-shaped frame 320 slide inside the chute, and the rollers at the tops of the connecting shafts 321 roll inside the card slot 311, so that the U-shaped frame 320 is slidably clamped under the second guide rail 310.

[0054] As Figure 6 and Fig.10 shown, in this embodiment, a second motor 323 for driving a shaft rod 322 to rotate is fixed at one end of the U-shaped frame 320. The fishing line rope 331 is red, and a notch is formed on the bottom surface of the counterweight ball 340, and a magnet block 341 is fixedly embedded inside the notch.

[0055] In this embodiment, the second motor 323 drives the shaft rod 322 to rotate, causing the plurality of winding wheels 330 to rotate and release the fishing line rope 331, facilitating the insertion of the fishing line rope 331 into the middle position of the connecting piece 830. When the second motor 323 rotates in the reverse direction, the shaft rod 322 drives the plurality of winding wheels 330 to rotate and wind up the fishing line rope 331, facilitating the winding of the counterweight ball 340 at the bottom of the fishing line rope 331 to the top of the battery pack. Then, the counterweight ball 340 can be used again to drive the fishing line rope 331 to be inserted between the connecting piece 830 and the battery pack for detection. Setting the fishing line rope 331 to be red can facilitate user observation and camera image acquisition. Embedding and fixing a magnet block 341 at the bottom of the counterweight ball 340 facilitates the adsorption and fixation of the iron column 630 inside the support tube 621.

[0056] As Figure 8 shown, in this embodiment, the driving mechanism 400 includes a second lead screw 410. The second lead screw 410 is rotatably connected to the inner top of the detection box 110. A moving block that is in threaded connection with the outside of the second lead screw 410 and is slidably connected to the detection box 110 is provided. A square tube 411 is fixed to the bottom end of the moving block. A sleeve 420 is fixedly sleeved on the outside of the U-shaped frame 320. A square rod that is slidably connected to the square tube 411 is fixed to the outside of the sleeve 420.

[0057] In this embodiment, the third motor 430 fixed to the outside of the detection box 110 drives the second lead screw 410 to rotate, causing the moving block that is in threaded connection with the second lead screw 410 to drive the square tube 411 to linearly move inside the detection box 110. The square tube 411 drives the sleeve 420 to move through the square rod, causing the U-shaped frame 320 to linearly move along with the sleeve 420. Furthermore, the U-shaped frame 320 moves at the bottom of the second guide rail 310. When the connecting shaft 321 on the U-shaped frame 320 moves to the inclined part at the end of the second guide rail 310, the square rod slides out of the square tube 411 to adapt to the inclined movement of the U-shaped frame 320 along the second guide rail 310.

[0058] As Figure 3 shown, in this embodiment, the conveying mechanism 700 includes two bottom plates 710. Two support seats 720 and U-shaped struts 730 are fixed to the top surface of the bottom plates 710. A pulley is rotatably arranged between the two support seats 720, and a conveyor belt 740 is传动 between the two pulleys.

[0059] In this embodiment, the battery pack is placed on the top of one end of the conveyor belt 740, and then the conveyor belt 740 conveys the battery pack into the detection box 110. After the battery pack is detected, it can be conveyed out of the detection box 110 by means of the conveyor belt 740 again, achieving the effect of automatically conveying the battery pack.

[0060] As Figure 3As shown, in this embodiment, between the tops of two support seats 720, a first guide rod 721 is fixed. On the tops of the other two support seats 720, second guide rods 722 are respectively fixed. A support plate is fixed between two C-shaped struts 730. The support plate is arranged below the conveyor belt 740 and is used to hold the battery pack.

[0061] In this embodiment, the first guide rod 721 and the second guide rods 722 can limit the conveying direction of the battery pack and prevent the conveyed battery pack from skewing. A fourth motor 723 is fixed to the outside of one support seat 720. The fourth motor 723 is used to drive the pulley at the corresponding position to rotate, so that the conveyor belt 740 conveys the battery pack on the support plate.

[0062] Embodiment 2, on the basis of Embodiment 1, in order to enable the counterweight ball 340 to stably insert the fishing line rope 331 between the battery pack and the connecting piece 830.

[0063] As Figure 6 shown, in this embodiment, the guiding mechanism 500 includes two electric push rods 510. The electric push rods 510 are fixedly connected to the first guide rail 210. The output ends of the two electric push rods 510 are fixedly connected with a support plate 520. On one side of the support plate 520, a plurality of first arc-shaped plates 521 are fixedly arranged at equal intervals. On the outside of the plurality of first arc-shaped plates 521, a cross beam 530 is fixedly connected. On one side of the cross beam 530, a plurality of second arc-shaped plates 531 are fixedly arranged at equal intervals.

[0064] After the conveyor belt 740 moves the battery pack to the detection station inside the detection box 110, the output end of the electric push rod 510 drives the support plate 520, the cross beam 530, the first arc-shaped plates 521 and the second arc-shaped plates 531 to move towards the battery pack as a whole, so that the first arc-shaped plates 521 and the second arc-shaped plates 531 are attached to the outside of the battery pack. Thus, when the counterweight ball 340 releases the fishing line rope 331, it can move down along the first arc-shaped plates 521 and the second arc-shaped plates 531 and accurately pass through the middle position of the connecting piece 830, preventing the falling counterweight ball 340 from shaking. The internal space between the first arc-shaped plates 521 and the second arc-shaped plates 531 meets the space requirement for the falling of the counterweight ball 340. After the counterweight ball 340 passes through the position between the connecting piece 830 and the battery pack with the fishing line rope 331, the output end of the electric push rod 510 can be retracted to make the first arc-shaped plates 521 and the second arc-shaped plates 531 leave the battery pack, facilitating the movement of the fishing line rope 331 at the welding position.

[0065] Embodiment 3, on the basis of Embodiment 1, in order to enable the bottom of the fishing line rope 331 to be subjected to different gravity traction effects, so as to adjust the force for the fishing line rope 331 to connect the connecting piece 830 and the pole 840 at the sorting and welding positions.

[0066] As Fig. 9As shown, in this embodiment, the counterweight mechanism 600 includes a supporting plate 610, which is fixedly connected to the inner bottom surface of the detection box 110, an electromagnet 611 is fixed to the top surface of the supporting plate 610, and a plurality of fixing rings 620 are fixed to the top surface of the electromagnet 611 at equal intervals, a support tube 621 is detachably screwed and connected to the inner side of the fixing ring 620, a ball receiving bucket is connected and fixed to the top of the support tube 621, and iron columns 630 are placed inside the plurality of support tubes 621.

[0067] In this embodiment, when it is necessary to add weight to the bottom end of the fishing line 331, the fishing line 331 falls so that the counterweight ball 340 enters the support tube 621 and falls on the top surface of the iron column 630, wherein the diameter of the support tube 621 is larger than the diameter of the counterweight ball 340, so that the counterweight ball 340 can move down along the support tube 621, and the magnet block 341 at the bottom of the counterweight ball 340 adsorbs and fixes the iron column 630, and then as the fishing line 331 moves up, the counterweight ball 340 moves the iron column 630 out of the support tube 621 together, so that the bottom end of the fishing line 331 is subjected to greater gravity, and thereby the fishing line 331 has a greater force to distribute the welding position when moving toward the welding position.

[0068] In this embodiment, when it is necessary to remove the iron column 630 from the counterweight ball 340, the fishing line 331 can be made to fall back into the support tube 621 with the iron column 630, and then the electromagnet 611 is energized to adsorb and fix the iron column 630, and then the fishing line 331 is moved upward to separate the counterweight ball 340 from the iron column 630, wherein the support tube 621 is detachably screwed and connected to the fixing ring 620, and the support tube 621 can be disassembled to put iron columns 630 of different weights into the support tube 621 to meet the need of applying different traction forces at the bottom of the fishing line 331

[0069] In the present invention, reference is made to the specification Figure 7 The lithium-ion battery pack body 800 is composed of multiple lithium-ion battery blocks 810 that are tied and fixed by fiber tapes 820. A connecting piece 830 is welded between the poles 840 of two adjacent lithium-ion battery blocks 810. The separation and cold welding phenomenon mentioned in this application is mainly that the pole 840 and one end of the connecting piece 830 are not firmly welded. The main reason for this separation and cold welding is that there is a difference in the material height of the two poles 840, or when welding one end of the connecting piece 830, the other end of the connecting piece 830 is tilted upward, which will also cause the separation and cold welding phenomenon.

[0070] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cold solder joint detection device for lithium battery processing, characterized in that: Including: A support platform (100), on the top surface of which a detection box (110) is fixed; A camera detection module (200) for collecting images of the welding position. The camera detection module (200) includes a first guide rail (210) fixed to the detection box (110). A transmission rod (220) is screwed and slid inside the first guide rail (210), and CCD cameras (230) are fixed at both ends of the transmission rod (220); A strength detection module (300) for detecting whether the connecting piece (830) is separated from the pole column (840). The strength detection module (300) includes two second guide rails (310) both fixedly connected to the detection box (110). A U-shaped frame (320) is slidably clamped between the bottoms of the two second guide rails (310). A shaft rod (322) is rotatably arranged inside the U-shaped frame (320), and a plurality of wire winding wheels (330) are evenly fixed on the outer side of the shaft rod (322). A fishing line rope (331) is wound and fixed on the outer side of the wire winding wheel (330), and a counterweight ball (340) is fixed at the bottom end of the fishing line rope (331); A driving mechanism (400) arranged at the inner top of the detection box for driving the U-shaped frame (320) to move the entire strength detection module (300); A guiding mechanism (500) fixed on one side of the first guide rail (210) for preventing the counterweight ball (340) from swaying during the falling process; A counterweight mechanism (600) fixed at the inner bottom of the detection box (110) for increasing the weight of the counterweight ball (340); A conveying mechanism (700) for conveying the battery pack to be detected for false soldering into the detection box (110) for detection.

2. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: A lead screw one (211) rotatably connected inside the first guide rail (210) and screwed to the transmission rod (220) is provided. One end of the first guide rail (210) is fixed with a motor one (212) for driving the lead screw one (211) to rotate. A rectangular hole is formed through one side of the detection box (110), and a glass plate is fixedly installed inside the rectangular hole.

3. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: At both ends of the top surface of the U-shaped frame (320), connecting shafts (321) are fixed. Rollers are rotatably arranged at the tops of the connecting shafts (321). A sliding groove slidably connected to the connecting shaft (321) is formed at the bottom surface of the second guide rail (310), and a clamping groove (311) for the roller to roll is formed at the inner top of the sliding groove.

4. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: One end of the U-shaped frame (320) is fixed with a motor two (323) for driving the shaft rod (322) to rotate. The fishing line rope (331) is red, and a notch is formed at the bottom surface of the counterweight ball (340), and a magnet block (341) is fixedly embedded inside the notch.

5. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: The driving mechanism (400) includes: A lead screw two (410) rotatably connected to the inner top of the detection box (110). A moving block slidably connected to the detection box (110) is screwed to the outer side of the lead screw two (410), and a square pipe (411) is fixed at the bottom end of the moving block; The sleeve (420) is sleeved and fixed on the outer side of the C-shaped frame (320), and a square rod slidably connected to the square tube (411) is fixed on the outer side of the sleeve (420).

6. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: The guiding mechanism (500) includes: Two electric push rods (510), which are fixedly connected to the first guide rail (210); A support plate (520), which is fixedly connected to the output ends of the two electric push rods (510), and a plurality of first arc-shaped plates (521) are fixedly arranged at equal intervals on one side of the support plate (520); A cross beam (530), which is fixedly connected to the plurality of first arc-shaped plates (521), and a plurality of second arc-shaped plates (531) are fixedly arranged at equal intervals on one side of the cross beam (530).

7. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: The weight mechanism (600) includes: A bearing plate (610), which is fixedly connected to the inner bottom surface of the detection box (110), and an electromagnet (611) is fixed on the top surface of the bearing plate (610); A plurality of fixing rings (620), which are fixedly arranged at equal intervals on the top surface of the electromagnet (611), a support tube (621) is detachably screwed and connected inside the fixing ring (620), and a receiving hopper is fixedly connected and communicated at the top of the support tube (621); A plurality of iron columns (630) are respectively placed inside the corresponding support tubes (621).

8. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: The conveying mechanism (700) includes two bottom plates (710), two support seats (720) and C-shaped columns (730) are fixed on the top surfaces of the bottom plates (710), a belt pulley is rotated between the two support seats (720), and a conveyor belt (740) is driven between the two belt pulleys.

9. The cold welding detection equipment for lithium battery processing according to claim 8, characterized in that: Among them, A first guide rod (721) is fixed between the tops of the two support seats (720), a second guide rod (722) is fixed on the tops of the other two support seats (720), a support plate is fixed between the two C-shaped columns (730), and the support plate is arranged below the conveyor belt (740) for receiving the battery pack.

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