CN217006719U

CN217006719U - Utmost point ear welding strength detection device

Info

Publication number: CN217006719U
Application number: CN202123350251.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-19
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a tab welding strength detection device which comprises a rack, a rotating mechanism and a plurality of pulling mechanisms. The rotating mechanism comprises a rotating shaft, a positioning disc fixed on the rotating shaft and a plurality of positioning pieces arranged along the circumferential direction of the positioning disc at intervals, and the positioning disc can rotate along with the rotating shaft so as to drive the plurality of positioning pieces to circulate between the feeding station and the discharging station. In the detection process, the rotating shaft keeps rotating at a constant speed, and the plurality of positioning pieces sequentially pass through the feeding station along with the positioning disc, so that the batteries conveyed to the feeding station are continuously taken. After the battery enters the positioning piece, the corresponding pulling-up mechanism grabs the pole lug of the battery and pulls up the pole lug. Through reading the tension value of the tension sensor, whether the tab has insufficient solder joint can be judged. Multiple batteries can be tested simultaneously on multiple positioners. And the positioning disc can be continuously circulated under the driving of the rotating shaft, so that the continuity of detection is kept. Therefore, the detection efficiency of the tab welding strength detection device is high.

Description

Utmost point ear welding strength detection device

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a tab welding strength detection device.

Background

The welding strength of the negative electrode tab and the shell of the cylindrical battery directly influences the service life of the cylindrical battery and the reliability of the battery, so that the welding strength of the tab needs to be detected in the production and manufacturing process of the cylindrical battery. At present, the commonly used detection method is to respectively detect the tension of the battery tab of each station by using a tension and pressure sensor outside a turntable, but the method can only detect the tension of the battery one by one, so the detection efficiency is not high, and the productivity of the battery is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a tab welding strength detection device having high detection efficiency.

A tab welding strength detection device includes:

a frame;

the rotating mechanism comprises a rotating shaft, a positioning disc fixed on the rotating shaft and a plurality of positioning pieces arranged at intervals along the circumferential direction of the positioning disc, and the positioning disc can rotate along with the rotating shaft so as to drive the plurality of positioning pieces to circulate between a feeding station and a discharging station; and

the plurality of pulling-up mechanisms are arranged at intervals along the circumferential direction of the rotating shaft and correspond to the plurality of positioning pieces one by one, and each pulling-up mechanism comprises a driving piece, a tension sensor and a grabbing piece arranged at the measuring end of the tension sensor;

the battery can be in feeding station material loading extremely the setting element and ejection of compact station unloading, it can snatch the correspondence to grab the piece grab the utmost point ear of battery on the setting element, the driving piece can drive tension sensor rises in order to draw and rise utmost point ear.

In one embodiment, the rotating mechanism further includes a first cam sleeved on the rotating shaft and fixed to the frame, the first cam is circumferentially provided with a first cam groove, each of the pulling mechanisms further includes a follower fixedly connected to the tension sensor, and the followers of the pulling mechanisms are all disposed in the first cam groove.

In one embodiment, each positioning piece is provided with a shell blocking plate, and the shell blocking plates can abut against the shell of the battery on the positioning piece along the pulling direction of the driving piece.

In one embodiment, the rotating mechanism further comprises a driven gear fixed to the rotating shaft, and the driven gear can be meshed with a driving gear of the battery conveying device.

In one embodiment, each of the lifting mechanisms further comprises a fixing block and a connecting angle seat, the fixing block is fixed to the rotating shaft, the connecting angle seat is slidably mounted on the fixing block, the driving piece is mounted on the fixing block, the driving end of the driving piece is connected with the connecting angle seat, and the tension sensor is mounted on the connecting angle seat.

In one embodiment, each of the lifting mechanisms further includes an induction plate fixedly connected to the tension sensor, the rack is further provided with a displacement sensor, the induction plates of the plurality of lifting mechanisms can sequentially pass through a detection area of the displacement sensor along with the rotation of the rotating shaft, and the displacement sensor can detect a height difference of the induction plate compared with a calibrated height.

In one embodiment, the tension provided by the drive member is adjustable.

In one embodiment, the driving member is an air cylinder, and the tab welding strength detection device further includes a pressure regulating valve capable of controlling an internal air pressure of the air cylinder to regulate a pulling force of the driving member.

In one embodiment, the battery charging device further comprises a plurality of inward pushing mechanisms which are arranged on the positioning disc and correspond to the positioning pieces one to one, and after the battery enters the positioning pieces from the feeding station, the corresponding inward pushing mechanisms can push the pole lugs of the battery towards the center of the battery.

In one of them embodiment, every push-in mechanism includes push pedal, swing arm and locates the first gyro wheel of swing arm one end, the swing arm with the push pedal linkage, slewing mechanism still includes the second cam, the second cam cover is located the pivot is fixed in the frame, the second cam has seted up the second cam groove along circumference, just first gyro wheel can be followed the second cam groove rolls in order to drive the swing arm swing, and after the battery got into the setting element, by the swing arm drives the push pedal promotes the utmost point ear of battery towards the center of battery.

Above-mentioned utmost point ear welding strength detection device, battery conveyor can constantly carry the battery of accomplishing utmost point ear welding to the feeding station. In the detection process, the rotating shaft keeps rotating at a constant speed, and the plurality of positioning pieces sequentially pass through the feeding station along with the positioning disc, so that the batteries of the feeding station are continuously connected. After the battery enters the positioning piece, the corresponding grabbing piece of the pulling-up mechanism grabs the pole lug of the battery and pulls up the pole lug under the driving of the driving piece. Through reading the tension value of the tension sensor, whether the tab has insufficient solder joint can be judged. Multiple batteries can be tested simultaneously on multiple positioners. And the positioning disc can be continuously circulated under the driving of the rotating shaft, so that the detection continuity is kept. Therefore, the detection efficiency of the tab welding strength detection device is high.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view of a tab welding strength detecting apparatus according to a preferred embodiment of the present invention;

fig. 2 is a front view of a rotating mechanism in the tab welding strength detecting apparatus shown in fig. 1;

fig. 3 is a front view of a pulling-up mechanism in the tab welding strength detection apparatus shown in fig. 1;

FIG. 4 is a side view of the pulling mechanism of FIG. 3;

fig. 5 is a front view of an inward pushing mechanism in the tab welding strength detection apparatus shown in fig. 1;

fig. 6 is a side view of the push-in mechanism shown in fig. 5.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1, a tab welding strength detecting apparatus 10 according to a preferred embodiment of the present invention includes a frame 100, a rotating mechanism 200, and a pulling mechanism 300.

The frame 100 is used for supporting and fixing, and the rotating mechanism 200 is mounted on the frame 100. Referring to fig. 2, the rotating mechanism 200 includes a rotating shaft 210, a positioning plate 220 and a plurality of positioning elements 230. The rotating shaft 210 may be rotatably mounted on the fixed plate of the frame 100 by a bearing. The positioning plate 220 is fixed to the shaft 210 and can rotate with the shaft 210. Each positioning member 230 can position and fix a battery to be detected, and a plurality of positioning members 230 are arranged at intervals along the circumferential direction of the positioning plate 220. Therefore, the positioning plate 220 has a plurality of stations capable of accommodating batteries, and can simultaneously carry a plurality of batteries.

Utmost point ear welding strength detection device 10 has feeding station and ejection of compact station, and feeding station and ejection of compact station set up along the circumference interval of positioning disk 220. The positioning plate 220 rotates with the rotating shaft 210, and drives the plurality of positioning members 230 to circulate between the feeding station and the discharging station. Moreover, the positioning member 230 can receive the battery at the feeding station and discharge the battery at the discharging station. A battery conveying device (not shown) can continuously convey the battery with the welded lugs to the feeding station. When the positioning member 230 is circulated to the feeding station, the battery positioned at the feeding station can be accessed; in the process that the positioning plate 220 drives the positioning piece 230 carrying the battery to move towards the discharging station, the detection of the welding strength of the battery tabs can be completed, and the battery subjected to the detection is discharged when the positioning piece 230 moves to the discharging station.

The battery conveying device generally adopts a rotary table conveying mode, and the rotary table is driven by a driving shaft of a driving mechanism (not shown) to pass through a blanking station of a tab welding device (not shown), so that batteries subjected to tab welding are sequentially received, and the received batteries are transferred to a feeding station of the tab welding strength detection device 10.

Specifically, in the present embodiment, the rotating mechanism 200 further includes a driven gear 250 fixed to the rotating shaft 210, and the driven gear 250 can be engaged with a driving gear (not shown) of the battery conveying device. The driving gear of the battery conveying device is fixed on the driving shaft. Therefore, the driving shaft can drive the rotating shaft 210 to rotate while driving the turntable to rotate. Thus, the synchronization between the turntable and the positioning plate 220 is higher, which is beneficial for the positioning plate 220 to drive the positioning member 230 to accurately access the battery conveyed by the battery conveying device.

The lifting mechanisms 300 are provided in plural and are arranged corresponding to the positioning members 230 one by one. For example, the number of the positioning members 230 in the present embodiment is six, and thus the number of the pulling-up mechanisms 300 is also six. Further, a plurality of the pulling-up mechanisms 300 are provided at intervals in the circumferential direction of the rotary shaft 210.

Referring to fig. 3 and 4, each lifting mechanism 300 includes a driving member 310, a tension sensor 320, and a gripping member 330. The grasping member 330 is provided at the measuring end of the tension sensor 320. The driving member 310 can drive the tension sensor 320 to move up and down, thereby driving the grabbing member 330 to move up and down. The driving member 310 may be an air cylinder, an electric cylinder, or a motor ball screw pair structure, and is used to pull up the tension sensor 320 and the grabbing member 330 with a set pulling force. The driving member 310 in this embodiment is a cylinder, which responds quickly and is more convenient for controlling the pulling force.

The grasping members 330 can grasp and release the tab. In this embodiment, the gripper 330 is a cylinder gripper. In the process that the positioning plate 220 drives the positioning member 230 carrying the battery to move toward the discharging station, the grabbing member 330 can grab the tab of the battery on the corresponding positioning member 230, and lift the tab under the driving of the driving member 310. At this time, the tension applied to the tab can be obtained by reading the tension value of the tension sensor 320. According to the tension value of the tension sensor 320, the welding strength of the corresponding battery tab can be detected. Specifically, the tension value of the tension sensor 320 is compared with the tension force set by the driving member 310, and if the difference between the tension value and the tension force is within a preset range, it indicates that no cold joint exists, and the welding strength of the tab can meet the requirement.

In particular, in this embodiment, the pulling force provided by the actuator 310 is adjustable. Therefore, the pulling force of the driving member 310 can be adaptively adjusted according to different detection conditions, so as to increase the application range of the tab welding strength detection device 10.

Further, in the present embodiment, the tab welding strength detecting device 10 further includes a pressure regulating valve 400, and the pressure regulating valve 400 can control the internal air pressure of the air cylinder to regulate the pulling force of the driving member 310.

In this embodiment, each lifting mechanism 300 further includes a fixing block 340 and a connecting angle seat 350, the fixing block 340 is fixed to the rotating shaft 210, the connecting angle seat 350 is slidably mounted on the fixing block 340, the driving element 310 is mounted on the fixing block 340, the driving end is connected to the connecting angle seat 350, and the tension sensor 320 is mounted on the connecting angle seat 350.

The fixed block 340 and the connecting angle seat 350 may be connected by a guide rail and a slider, the guide rail generally extending in the up-down direction of fig. 1. The driving member 310 drives the connecting angle seat 350 to move up and down relative to the fixing block 340, so as to drive the tension sensor 320 and the grabbing member 330 to move up and down.

In this embodiment, each lifting mechanism 300 further includes a sensing plate 360, and the rack 100 is further provided with a displacement sensor (not shown), and as the rotating shaft 210 rotates, the sensing plates 360 of the plurality of lifting mechanisms 300 can sequentially pass through a detection area of the displacement sensor, and the displacement sensor can detect a height difference of the sensing plates 360 compared to the calibration height.

Specifically, the sensing plate 360 is fixedly disposed on the connecting angle seat 350. The nominal height refers to the height that the tab should be pulled up when the driving element 310 pulls up the tab with a set pulling-up force on the premise that the welding strength of the tab meets the requirement. Therefore, if the height difference obtained by the displacement sensor is within a preset distance, it indicates that the welding strength of the corresponding battery tab can meet the requirement. It is thus clear that through setting up tablet 360 and displacement sensor, can play the additional action to pull force sensor 320 to promote the degree of accuracy that detects.

Referring to fig. 2 again, in the present embodiment, the rotating mechanism 200 further includes a first cam 240 sleeved on the rotating shaft 210 and fixed to the frame 100, the first cam 240 is circumferentially provided with a first cam groove 241, each of the pulling-up mechanisms 300 further includes a follower 370 fixedly connected to the tension sensor 320, and the followers 370 of the pulling-up mechanisms 300 are all disposed in the first cam groove 241.

Specifically, the first cam 240 is sleeved on the rotating shaft 210 and does not rotate along with the rotating shaft 210. The follower 370 may be fixedly mounted to the connection angle block 350. As the plurality of pull-up mechanisms 300 rotate with the shaft 210, the plurality of followers 370 will slide along the first cam grooves 241. Therefore, when the driver 310 drives the tension sensor 320 to move up and down to pull up the tab, the follower 370 is engaged with the first cam groove 241 to limit the range of up and down movement, so that damage to the battery can be avoided.

In this embodiment, each positioning member 230 is provided with a shell blocking plate 231, and the shell blocking plate 231 can abut against the housing of the battery on the positioning member 230 along the pulling direction of the driving member 310.

Specifically, the shell blocking plate 231 has a generally L-shaped plate structure, and the shell blocking plate 231 can press the housing of the battery on the corresponding positioning member 230 without shielding the tabs. Therefore, in the process of pulling up the tab by the pulling-up mechanism 300, the shell blocking plate 231 can effectively prevent the casing of the battery from being pulled up, and ensure that only the body of the battery is pulled up, thereby ensuring the accuracy of detection.

Referring to fig. 1 again, in the present embodiment, the tab welding strength detecting device 10 further includes a plurality of pushing mechanisms 500 installed on the positioning plate 220 and corresponding to the plurality of positioning members 230, and after the battery enters the positioning members 230 from the feeding station, the corresponding pushing mechanisms 500 can push the tabs of the battery toward the center of the battery.

After the tab is welded, the tab is deviated from the center of the battery in a natural state, so that the tab is easily interfered with a necking film on the battery shell. Therefore, the tab is not easily grabbed by the grabbing piece 330 during the welding strength detection. And the push-in mechanism 500 can push the tabs of the battery toward the center of the battery. Therefore, the interference between the tab and the necking film can be avoided, so that the tab can be conveniently and smoothly grabbed by the grabbing piece 330.

Referring to fig. 5 and fig. 6, in the present embodiment, each of the pushing mechanisms 500 includes a pushing plate 510, a swinging arm 520, and a first roller 530 disposed at one end of the swinging arm 520, wherein the swinging arm 520 is linked with the pushing plate 510. Therefore, the swing arm 520 swings to drive the push plate 510 to move, so that the push plate 510 pushes the tab toward the center of the battery. Specifically, in the present embodiment, each pushing mechanism 500 further includes a mounting block 540, a pulling plate 550 and a second roller 560.

The mounting block 540 is generally fixedly mounted below the puck 220, the pull plate 550 is slidably coupled to the mounting block 540 via a wire track, and one end is coupled to the push plate 510. The second roller 560 is disposed at an end of the swing arm 520 away from the first roller 530 and is clamped at an end of the pull plate 550 away from the push plate 510. Thus, when the swing arm 520 is in use, the second roller 560 can reduce the friction between the swing arm 520 and the pull plate 550, so as to avoid being stuck. When the swing arm 520 swings in the predetermined direction, the pull plate 550 can be driven to slide on the mounting block 540, so as to drive the push plate 510 to push toward the center of the battery.

Further, the rotating mechanism 200 further includes a second cam 260, the rotating shaft 210 is sleeved with the second cam 260 and fixed to the frame 100, a second cam groove (not shown) is formed in the second cam 260 along the circumferential direction, and the first roller 530 can roll along the second cam groove to drive the swing arm 520 to swing, and after the battery enters the positioning member 230, the swing arm 520 drives the push plate 510 to push the tab of the battery toward the center of the battery.

Specifically, the rotating mechanism 200 further includes a bearing housing 270, the bearing housing 270 is fixed to the frame 100, the rotating shaft 210 is installed in the bearing housing 270 through a bearing (not shown), and the second cam 260 is sleeved and fixedly installed on the bearing housing 270. Therefore, the second cam 260 does not rotate with the rotation shaft 210. The rotation of the shaft 210 will drive the first roller 530 to roll along the second cam groove. By changing the shape of the second cam groove, the swing roller 520 can be driven to swing in a predetermined direction when the first roller 530 rolls to a predetermined position. The swing path of the swing arm 520 is determined by the shape of the second cam groove. Therefore, by designing the shape of the second cam groove, the swing arm 520 can drive the push plate 510 to push towards the center of the battery after the positioning member 230 passes through the feeding station, thereby preventing the tab from interfering with the necking film.

Above-mentioned utmost point ear welding strength detection device 10, battery conveyor can constantly carry the battery of accomplishing utmost point ear welding to the feeding station. In the detection process, the rotating shaft 210 keeps rotating at a constant speed, and the plurality of positioning members 230 sequentially pass through the feeding station along with the positioning disc 220, so that the batteries at the feeding station are continuously taken out. After the battery enters the positioning member 230, the corresponding gripping member 330 of the pulling-up mechanism 300 grips the tab of the battery and pulls up the tab under the driving of the driving member 310. By reading the tension value of the tension sensor 320, whether the tab has insufficient solder joint can be judged. A plurality of batteries can be simultaneously detected on a plurality of the spacers 230. Moreover, the positioning disc 220 can be continuously circulated under the driving of the rotating shaft 210, so that the continuity of the detection is maintained. Therefore, the tab welding strength detection device 10 has high detection efficiency.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a utmost point ear welding strength detection device which characterized in that includes:

a frame;

2. The tab welding strength detection device according to claim 1, wherein the rotation mechanism further includes a first cam sleeved on the rotation shaft and fixed to the frame, the first cam is circumferentially provided with a first cam groove, each of the pulling-up mechanisms further includes a follower fixedly connected to the tension sensor, and the followers of the pulling-up mechanisms are all disposed in the first cam groove.

3. The device for detecting the welding strength of the electrode tabs according to claim 1, wherein each positioning member is provided with a baffle plate, and the baffle plate can abut against a housing of the battery on the positioning member along the pulling direction of the driving member.

4. The tab welding strength detection device according to claim 1, wherein the rotation mechanism further comprises a driven gear fixed to the rotation shaft, the driven gear being capable of meshing with a driving gear of a battery transportation device.

5. The tab welding strength detection device according to claim 1, wherein each of the pulling mechanisms further comprises a fixing block and a connection angle seat, the fixing block is fixed to the rotating shaft, the connection angle seat is slidably mounted on the fixing block, the driving member is mounted on the fixing block, the driving end is connected with the connection angle seat, and the tension sensor is mounted on the connection angle seat.

6. The device for detecting the welding strength of the tab according to claim 1, wherein each of the pulling mechanisms further comprises an induction plate fixedly connected with the tension sensor, the frame is further provided with a displacement sensor, the induction plates of the pulling mechanisms can sequentially pass through a detection area of the displacement sensor along with the rotation of the rotating shaft, and the displacement sensor can detect a height difference of the induction plate compared with a calibrated height.

7. The tab welding strength detection device according to claim 1, wherein the tension provided by the driving member is adjustable.

8. The tab welding strength detecting device according to claim 7, wherein the driving member is a cylinder, and the tab welding strength detecting device further comprises a pressure regulating valve capable of controlling an internal air pressure of the cylinder to regulate a pulling force of the driving member.

9. The tab welding strength detection device according to claim 1, further comprising a plurality of inward pushing mechanisms installed on the positioning plate and corresponding to the plurality of positioning members one to one, wherein after the battery enters the positioning members from the feeding station, the corresponding inward pushing mechanisms can push the tabs of the battery toward the center of the battery.

10. The tab welding strength detection device according to claim 9, wherein each of the push-in mechanisms comprises a push plate, a swing arm and a first roller arranged at one end of the swing arm, the swing arm is linked with the push plate, the rotating mechanism further comprises a second cam, the second cam is sleeved on the rotating shaft and fixed on the frame, a second cam groove is formed in the second cam along the circumferential direction, the first roller can roll along the second cam groove to drive the swing arm to swing, and after a battery enters the positioning member, the swing arm drives the push plate to push the tab of the battery towards the center of the battery.