Cold solder joint detection equipment for lithium battery processing

Abstract

The invention relates to the technical field of lithium battery cold solder joint detection, in particular to cold solder joint detection equipment for lithium battery processing, which comprises a supporting table, a detection box is fixed on the top surface of the supporting table, a strength detection module is fixed in the detection box, a shaft rod is rotatably arranged on the inner side of a [-shaped frame, and a plurality of reels are uniformly fixed on the outer side of the shaft rod. And a fish rope is wound and fixed to the outer side of the reel, and a balance weight ball is fixed to the bottom end of the fish rope. According to the invention, a plurality of reels on the strength detection module rotate to release a fish rope, so that a counterweight ball drives the fish rope to be inserted between a connecting piece and a battery pack, and a driving mechanism drives a [-shaped frame to drive the fish rope to move in a direction deviating from a welding position of the connecting piece and a pole; if the fish wire rope passes through the welding position, the connecting piece and the pole column have a separation pseudo soldering phenomenon, so that a user can intuitively observe the arrangement condition of the fish wire rope at the welding position to judge whether the welding position has separation pseudo soldering or not.

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. 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

[0003] 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.

[0004] To achieve the above object, the present invention provides the following technical solutions: A cold solder joint detection device for lithium battery processing, comprising: A support platform, a detection box is fixed on the top surface of the support platform; A camera detection module is used to collect welding position images, and the camera detection module includes a guide rail 1 fixed to the detection box, a transmission rod is slidably screwed inside the guide rail 1, and CCD cameras are fixed at both ends of the transmission rod; Strength detection module, used to detect whether the connecting piece is separated from the pole column. The strength detection module includes two guide rails II both fixedly connected to the detection box. A U-shaped frame is slidably clamped between the bottoms of the two guide rails II. A shaft rod is rotatably arranged inside the U-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; Driving mechanism, arranged at the inner top of the detection box, used to drive the U-shaped frame to move the entire strength detection module; Guiding mechanism, fixed on one side of the guide rail I, used to prevent the counterweight ball from swaying during the falling process; Counterweight mechanism, fixed at the inner bottom of the detection box, used to increase the weight of the counterweight ball; Conveying mechanism, used to convey the battery pack to be detected for false soldering into the detection box for detection.

[0005] Furthermore: A lead screw I that is rotationally connected to the transmission rod is rotationally connected inside the guide rail I. One end of the guide rail I is fixed with a motor I for driving the lead screw I to rotate. A rectangular hole is penetrated and opened on one side of the detection box. A glass plate is fixedly installed inside the rectangular hole.

[0006] Furthermore: Connecting shafts are fixed at both ends of the top surface of the U-shaped frame. Rollers are rotatably arranged at the tops of the connecting shafts. A sliding groove that is slidably connected to the connecting shaft is opened on the bottom surface of the guide rail II. A clamping groove that is rollingly connected to the roller is opened at the inner top of the sliding groove.

[0007] Furthermore: A motor II for driving the shaft rod to rotate is fixed at one end of the U-shaped frame. The fishing line rope is red. A notch is opened on the bottom surface of the counterweight ball. A magnet block is embedded and fixed inside the notch.

[0008] Furthermore: The driving mechanism includes: Lead screw II, rotationally connected to the inner top of the detection box. A moving block that is slidably connected to the detection box is screwed on the outer side of the lead screw II. A square tube is fixed at the bottom end of the moving block; A sleeve, sleeved and fixed on the outer side of the U-shaped frame. A square rod that is slidably connected to the square tube is fixed on the outer side of the sleeve.

[0009] Furthermore: The guiding mechanism includes: Two electric push rods, the electric push rods are fixedly connected to the guide rail I; A support plate, fixedly connected to the output ends of the two electric push rods. A plurality of arc-shaped plates I are evenly fixed on one side of the support plate; A cross beam, fixedly connected to the plurality of arc-shaped plates I. A plurality of arc-shaped plates II are evenly fixed on one side of the cross beam.

[0010] Furthermore, the counterweight mechanism includes: A bearing plate fixedly connected to the inner bottom surface of the detection box, and an electromagnet is fixedly installed on the top surface of the bearing plate; 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, and a ball-catching bucket is fixedly connected and communicated at the top of the support tube; A plurality of iron columns are respectively placed inside the support tubes at corresponding positions.

[0011] Furthermore, the conveying mechanism includes two bottom plates. Two support seats and U-shaped columns are fixedly installed on the top surface of the bottom plates. A belt pulley is rotatably arranged between the two support seats, and a conveyor belt is driven between the two belt pulleys.

[0012] Furthermore, a first guide rod is fixedly installed between the tops of the two support seats, and a second guide rod is fixedly installed on the tops of the other two support seats. A support plate is fixedly installed between the two U-shaped columns. The support plate is arranged below the conveyor belt and is used for receiving the battery pack.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By placing the battery pack on its side on the conveyor belt and transporting it into the detection box by means of the conveyor belt, the drive shaft of the second motor rotates to make a plurality of wire reels rotate and release the fishing line ropes. The fishing line ropes vertically fall under the gravity of the counterweight balls. The counterweight balls pass through the bent position in the middle of the connecting piece to make the fishing line ropes penetrate between the connecting piece and the battery pack. The driving mechanism drives the U-shaped frame with a plurality of wire reels on the shaft rod to move along the second guide rail away from the battery pack, so that the fishing line ropes move towards the position between the connecting piece and the pole. The counterweight balls make the moving fishing line ropes maintain a vertical state. If there is a separation and false soldering phenomenon between the end of the connecting piece and the pole, the fishing line ropes can pass through the soldering position between the connecting piece and the pole. If the connecting piece and the pole are in a firmly soldered state, the fishing line ropes cannot pass through the soldering position, and a phenomenon occurs that the part of the fishing line rope above the soldering position bends in the moving direction of the wire reel, and the part of the fishing line rope below the soldering position still remains vertically arranged, which is convenient for the user to directly observe the arrangement of the fishing line ropes at the soldering position through the glass plate on the detection box to judge whether there is a separation and false soldering at the soldering position.

[0014] 2. The first motor drives the first lead screw to rotate, causing the transmission rod to slide along the first guide rail. As a result, the transmission rod drives the two CCD cameras to move horizontally back and forth along the first guide rail. The CCD cameras are directed at the connecting pieces on the battery pack. As the CCD cameras move to different positions, it is convenient to collect images of the welding joints of different connecting pieces on the battery pack, facilitating the visual detection of whether there are welding defects such as weld seams, cracks, and lack of fusion at the welding positions between the connecting pieces and the poles. At the same time, the CCD cameras can record the position state of the fishing line rope. By observing whether the fishing line rope passes through the welding position to indirectly expose welding defects and combining it with the mechanical vision detection of whether there are welding defects at the welding joints, it is beneficial to improve the accuracy of the welding defect detection results at the welding joints.

[0015] 3. By rotating to release the fishing line rope, the fishing line rope passing through the middle position of the connecting piece and the counterweight ball continue to move downward, causing the counterweight ball to pass through the receiving hopper and the support tube. The magnet block on the bottom surface of the counterweight ball adsorbs and fixes the iron column. The fishing line rope drives the counterweight ball and the iron column out of the receiving hopper. At this time, the bottom of the fishing line rope is subjected to a greater traction force. When the driving mechanism drives the wire reel to move the fishing line rope in the direction passing through the welding position, under the additional gravity of the iron column, the force of the fishing line rope to separate the connecting piece and the pole is relatively large. If the connecting piece and the pole are only slightly welded, under the separating action of the fishing line rope, the fishing line rope will move to the position between the connecting piece and the pole or pass through the welding position, realizing the detection of whether the connecting piece is firmly welded to the pole. Different weights of iron columns can be pre-placed inside the support tube, so that the fishing line rope is subjected to a greater downward traction force in the later stage, and then the fishing line rope can attempt to pass through the welding position with a greater extrusion force. For some thicker connecting pieces, a heavier iron column 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, a lighter iron column 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, thereby realizing the reflection of whether the welding strength of different thickness connecting pieces meets the usage requirements of the battery pack by whether the fishing line rope passes through or is embedded in the welding position.

[0016] 4. By setting the two ends of the second guide rail to be inclined and the middle part of the second guide rail to be straight, when the C-shaped frame moves along the 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, enabling the fishing line rope to move precisely towards the welding position and effectively preventing the fishing line rope from moving to the end of the pole close to the battery pack. The driving mechanism can drive the fishing line rope passing through the connecting piece to move towards the two ends of the second guide rail in sequence, so that the fishing line rope can move towards the welding positions at both ends of the connecting piece in sequence, facilitating the detection of welding defects at both ends of the connecting piece and achieving the effect of comprehensively detecting multiple welding positions on the battery pack. Description of the Drawings

[0017] Figure 1 is the schematic diagram of the overall structure of the present invention Figure 1 ; Figure 2 is the schematic diagram of the overall structure of the present invention Figure 2 ; Figure 3 is the schematic diagram of the conveying mechanism and the battery pack structure in the present invention; Figure 4 is the schematic diagram of the internal structure of the detection box in the present invention; Figure 5 is the schematic diagram of the camera detection module structure in the present invention; Figure 6 is the schematic diagram of the strength detection module and the guiding mechanism structure in the present invention; Figure 7 is the schematic diagram of the strength detection module and the battery pack structure in the present invention; Figure 8 is the schematic diagram of the detection box and the driving mechanism structure in the present invention; Fig. 9 is the schematic diagram of the counterweight mechanism structure in the present invention; Fig.10 is the schematic diagram of the counterweight ball structure in the present invention.

[0018] In the figure: 100, support platform; 110, detection box; 200, camera detection module; 210, first guide rail; 211, first lead screw; 212, first motor; 220, transmission rod; 230, CCD camera; 300, strength detection module; 310, second guide rail; 311, card slot; 320, U-shaped frame; 321, connecting shaft; 322, shaft rod; 323, second motor; 330, winding wheel; 331, fishing line rope; 340, counterweight ball; 341, magnet block; 400, driving mechanism; 410, second lead screw; 411, square tube; 420, sleeve; 430, third motor; 500, guiding mechanism; 510, electric push rod; 520, support plate; 521, first arc-shaped plate; 530, cross beam; 531, second arc-shaped plate; 600, counterweight mechanism; 610, bearing plate; 611, electromagnet; 620, fixed ring; 621, support tube; 630, iron column; 700, conveying mechanism; 710, bottom plate; 720, support seat; 721, first guide rod; 722, second guide rod; 723, fourth motor; 730, U-shaped support; 740, conveyor belt; 800, battery pack body; 810, lithium-ion battery block; 820, fiber tape; 830, connecting piece; 840, pole. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 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. A camera detection module 200 for collecting images of welding positions is fixed inside the detection box 110. The camera detection module 200 includes a guide rail 210 fixed to the detection box 110. A transmission rod 220 is screwed and slid inside the guide rail 210. CCD cameras 230 are fixed at both ends of the transmission rod 220. An intensity detection module 300 for detecting whether the connecting piece 830 is separated from the pole 840 is fixed inside the detection box 110. The intensity detection module 300 includes two 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 guide rails 310. A shaft rod 322 is rotatably arranged inside the U-shaped frame 320. A plurality of 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 winding wheel 330. A counterweight ball 340 is fixed at the bottom end of the fishing line rope 331. A driving mechanism 400 for driving the U-shaped frame 320 to move the entire intensity detection module 300 is arranged at the inner top of the detection box 110. A guiding mechanism 500 for preventing the counterweight ball 340 from shaking during the falling process is arranged on one side of the guide rail 210. A counterweight mechanism 600 for increasing the weight of the counterweight ball 340 is fixed at the inner bottom of the detection box 110. A conveying mechanism 700 for conveying the battery pack to be detected for virtual soldering into the detection box 110 for detection is arranged through the middle of the detection box 110.

[0021] Specifically, by placing the battery pack sideways inside the detection box 110, the shaft rod 322 on the strength detection module 300 drives multiple wire reels 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 into the position 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 away from the welding position of the connecting piece 830 and the pole 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 means that the connecting piece 830 and the pole 840 are separated and have false soldering. It is convenient for the user to visually observe the arrangement of the fishing line rope 331 at the welding position to judge whether there is separation and false soldering at the welding position. At the same time, the CCD camera 230 can move along the welding position direction to record images, which is convenient for detecting whether there are false soldering phenomena such as weld seams, cracks, and lack of fusion at the welding position of the connecting piece 830 and the pole 840 from the visual aspect. By combining the indirect exposure of the false soldering problem by observing whether the fishing line rope 331 passes through the welding position with the detection of whether there is false soldering at the welding position by the CCD camera 230, it is beneficial to improve the accuracy of the false soldering detection result at the welding position.

[0022] As Figure 1 and Figure 5 shown, in this embodiment, a lead screw one 211 that is rotationally connected to the transmission rod 220 is rotationally connected inside the first guide rail 210. 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 installed and fixed inside the rectangular hole.

[0023] In this embodiment, the motor one 212 drives the lead screw one 211 to rotate forward and backward, so that the transmission rod 220 that is screwed to the lead screw one 211 drives 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. Through image processing software, operations such as filtering, edge detection, and feature extraction are performed on the images to accurately identify whether there is false soldering at the welding position of the connecting piece 830 and the pole 840. The false soldering 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 visually observe the position of the fishing line rope 331 and the welding place, and indirectly judge the welding separation phenomenon in false soldering by judging whether the fishing line rope 331 passes through the welding position.

[0024] As Figure 8 shown, in this embodiment, both ends of the top surface of the U-shaped frame 320 are fixed with connecting shafts 321. Rollers are rotated on 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 on the inner top of the chute.

[0025] In this embodiment, when the driving mechanism 400 drives the C-shaped frame 320 to move along the bottom of the second guide rail 310, the connecting shaft 321 on the C-shaped frame 320 slides in the chute, and the roller at the top of the connecting shaft 321 rolls inside the card slot 311, so that the C-shaped frame 320 is slidably clamped under the second guide rail 310.

[0026] As Figure 6 and Fig.10 shown, in this embodiment, a second motor 323 for driving the shaft rod 322 to rotate is fixed at one end of the C-shaped frame 320. The fishing line rope 331 is red, and a notch is formed in the bottom surface of the counterweight ball 340, and a magnet block 341 is fixedly embedded in the notch.

[0027] In this embodiment, the second motor 323 drives the shaft rod 322 to rotate to make the plurality of winding wheels 330 rotate to release the fishing line rope 331, which facilitates the fishing line rope 331 to be inserted into the middle position of the connecting piece 830. The second motor 323 rotates in the reverse direction to drive the shaft rod 322 to drive the plurality of winding wheels 330 to rotate and wind up the fishing line rope 331, which facilitates the counterweight ball 340 at the bottom of the fishing line rope 331 to be wound up to the top of the battery pack. Then, the counterweight ball 340 can be used to drive the fishing line rope 331 to be inserted between the connecting piece 830 and the battery pack for detection again. Setting the fishing line rope 331 to be red can facilitate the user to observe and the camera to collect images. Embedding and fixing the magnet block 341 at the bottom of the counterweight ball 340 facilitates adsorbing and fixing the iron column 630 inside the support tube 621.

[0028] 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 screwed to the outside of the second lead screw 410 and 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 sleeved and fixed to the outside of the C-shaped frame 320, and a square rod that is slidably connected to the square tube 411 is fixed to the outside of the sleeve 420.

[0029] In this embodiment, the third motor 430 fixed to the outside of the detection box 110 drives the second lead screw 410 to rotate, so that the moving block screwed to the second lead screw 410 drives 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, so that the C-shaped frame 320 linearly moves along with the sleeve 420. Furthermore, the C-shaped frame 320 moves at the bottom of the second guide rail 310. When the connecting shaft 321 on the C-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 C-shaped frame 320 along the second guide rail 310.

[0030] As Figure 3As shown, in this embodiment, the conveying mechanism 700 includes two bottom plates 710. On the top surface of the bottom plates 710, two support seats 720 and U-shaped columns 730 are fixed. A belt pulley is rotatably arranged between the two support seats 720, and a conveyor belt 740 is driven between the two belt pulleys.

[0031] 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 interior of the detection box 110. After being detected, the battery pack can be conveyed out of the detection box 110 again by means of the conveyor belt 740, achieving the effect of automatically conveying the battery pack.

[0032] As Figure 3 shown, in this embodiment, between the tops of the 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 fixed. A support plate is fixed between the two U-shaped columns 730. The support plate is arranged below the conveyor belt 740 and is used to承接 the battery pack.

[0033] In this embodiment, the first guide rod 721 and the second guide rod 722 can limit the conveying direction of the battery pack and prevent the conveyed battery pack from being skewed. A fourth motor 723 is fixed to the outside of one support seat 720. The fourth motor 723 is used to drive the corresponding belt pulley to rotate, so that the conveyor belt 740 conveys the battery pack on the support plate.

[0034] 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.

[0035] 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.

[0036] After the conveyor belt 740 moves the battery pack to the inspection station inside the inspection box 110, the output end of the electric push rod 510 moves toward the battery pack with the support plate 520, the cross beam 530, the arc plate 1 521 and the arc plate 2 531 as a whole, so that the arc plate 1 521 and the arc plate 2 531 are close to the outside of the battery pack, so that the weight ball 340 can move down along the arc plate 1 521 and the arc plate 2 531 and accurately pass through the connecting line 331 during the release process. The middle position of the connecting piece 830 prevents the falling counterweight ball 340 from shaking. The internal space of the arc plate 1 521 and the arc plate 2 531 meets the space requirements for the counterweight ball 340 to fall. After the counterweight ball 340 carries the fishing line 331 through the position between the connecting piece 830 and the battery pack, the output end of the electric push rod 510 can be contracted, so that the arc plate 1 521 and the arc plate 2 531 leave the battery pack, which facilitates the movement of the fishing line 331 at the welding position.

[0037] Embodiment 3, based on embodiment 1, in order to make the bottom of the fishing line 331 be subjected to different gravity traction effects, the strength of the welding position connecting piece 830 and the pole 840 of the fishing line 331 is regulated.

[0038] like Fig. 9 As 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.

[0039] 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.

[0040] 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 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.

[0041] 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.

[0042] 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). 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 fixed to the detection box (110). A C-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 C-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 and is used to drive the C-shaped frame (320) to move the entire strength detection module (300); A guiding mechanism (500) is fixed on one side of the first guide rail (210) and is used to prevent 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) and is used to increase the weight of the counterweight ball (340); A conveying mechanism (700) is used to convey 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 first lead screw (211) that is rotatably connected inside the first guide rail (210) and is screwed to the transmission rod (220) is provided. A first motor (212) for driving the first lead screw (211) to rotate is fixed at one end of the first guide rail (210). A rectangular hole is formed through one side of the detection box (110), and a glass plate is installed and fixed inside the rectangular hole.

3. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: Connecting shafts (321) are fixed at both ends of the top surface of the C-shaped frame (320). Rollers are rotatably arranged at the tops of the connecting shafts (321). A chute for slidably connecting with the connecting shaft (321) is formed at the bottom surface of the second guide rail (310), and a card slot (311) for rolling connection with the roller is formed at the inner top of the chute.

4. The cold welding detection equipment for lithium battery processing according to claim 1, characterized in that: A second motor (323) for driving the shaft rod (322) to rotate is fixed at one end of the C-shaped frame (320). The fishing line rope (331) is red. A notch is formed at the bottom surface of the counterweight ball (340), and a magnet block (341) is embedded and fixed 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 second lead screw (410) that is rotatably connected at the inner top of the detection box (110). A moving block that is screwed to the outer side of the second lead screw (410) and is slidably connected to the detection box (110) is provided. A square tube (411) is fixed at the bottom end of the moving block; The sleeve (420) is sleeved and fixed on the outer side of the U-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), which 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 U-shaped columns (730) are fixed on the top surface of the bottom plates (710), a belt pulley is rotatably arranged 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 U-shaped columns (730), and the support plate is arranged below the conveyor belt (740) for receiving the battery pack.

Images