Ultrasonic pseudo soldering detection device for soft package lithium ion battery tab

Abstract

The utility model discloses a soft package lithium ion battery tab ultrasonic pseudo soldering detection device, which comprises a fixed seat and a detection device, one side of the height adjusting mechanism is connected with the fixed seat, the height adjusting mechanism is arranged below the measuring device, and the height adjusting mechanism abuts against the measuring device; the first supporting seat is connected with the other side of the height adjusting mechanism, a rotatable blocking piece is arranged on the first supporting seat, the lower end of the blocking piece extends to the position below the first supporting seat, and the middle position of the blocking piece is connected with a pressure auxiliary mechanism. The device can efficiently and timely detect whether the tab is subjected to cold solder joint, reduces the influence on the production efficiency of a battery, ensures the welding yield of the battery tab, reduces the screening of workers in the subsequent process, saves the labor cost, and can avoid the scrap caused by incapability of completely screening out the bad solder joint at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection technical field, especially relate to a kind of soft package lithium ion battery tab ultrasonic false welding detection device. BACKGROUND

[0002] In recent years, the application of lithium ion battery is more and more extensive, and the market demand is more and more large, which promotes the development of lithium ion battery production and manufacturing, among which, the tab can be obtained by welding or laser cutting pole piece in the battery production process. Because dust will be generated in the process of laser cutting pole piece, if these dusts are attached to the pole piece coiled material and brought into the following process, or even rolled into the battery, it is easy to pierce the diaphragm paper in the battery, causing the battery micro short circuit, and even leading to battery explosion and other safety hazards. Therefore, welding is still the mainstream method to obtain battery tab.

[0003] In the soft package lithium ion battery manufacturing process, the tab is welded on the pole piece by ultrasonic wave, and the phenomenon of false welding should not be required, otherwise the battery will be scrapped due to no charging and output power. In the process of continuous welding of pole piece, abnormal conditions such as welding pressure, parameter not adjusted well, foreign matter in head, head wear and equipment failure often occur, resulting in the phenomenon that the welding device has welding action, but no energy output or insufficient energy output. At this time, the tab will be stuck together with the pole piece under the extrusion of the welding head and the welding seat, but actually there is no welding fusion. This false welding phenomenon is difficult to see from the appearance, especially the tab will be pasted with positive and negative protective green glue, so that the false tab is more difficult to be found.

[0004] The conventional method to prevent whether the tab on the pole piece is false welding is as follows: three tabs of welded pole pieces are taken for sampling at the beginning of daily production, the pulling force of the tab peeling off the pole piece is measured, and whether the welding mark on the tab has pole piece substrate residue is observed. The pulling force is greater than or equal to 5N, or the pole piece substrate residue area on the tab reaches 80% of the welding mark area, which is qualified. After normal production, the quality inspector will stop the running tab welding machine every 1 hour, take a pole piece with tab, and confirm the peeling force of the tab and the substrate residue again. This testing method is not only low in efficiency, but also cannot find the problem in time (once found, the welding in the previous 1 hour may be false welding), which not only affects the production efficiency, but also causes the final scrapped battery or the complaint of customer end due to the incomplete inspection of part of the false tab. UTILITY MODEL CONTENTS

[0005] The utility model discloses a purpose at overcoming the above -mentioned defects among prior art, provide a kind of soft package lithium ion battery tab ultrasonic false welding detection device, whether the tab can be efficiently and timely inspected false welding, reduce the production efficiency to battery and bring influence, guarantee the yield of battery tab welding, reduce the manpower cost of personnel screening in subsequent process, while can avoid the scrapping caused by not being able to completely screen out defective.

[0006] To achieve the above object, the utility model provides a kind of soft package lithium ion battery tab ultrasonic false welding detection device, comprising:

[0007] Fixed seat is provided with measuring device on the fixed seat;

[0008] One side is connected with the height adjusting mechanism of fixed seat, the height adjusting mechanism is set below measuring device, and the height adjusting mechanism is in contact with the measuring device;

[0009] The first support base is connected with the other side of the height adjusting mechanism, a rotatable baffle is provided on the first support base, the lower end of the baffle extends below the first support base, and the middle position of the baffle is connected with a pressure auxiliary mechanism.

[0010] Further, it further includes a second support base, the second support base is provided with a first connecting part and a second connecting part, the first connecting part is connected with the height adjusting mechanism, and the second connecting part is connected with the first support base. By setting the second support base, the first support base and the baffle can be away from the fixed seat to improve the range of their operation without interference with each other, and the structure is simple to disassemble and maintain.

[0011] Further, the height adjusting mechanism includes a first fixed block, a second fixed block and a first adjusting spring, the first fixed block and the second fixed block are fixedly connected with the fixed seat from top to bottom, a first connecting shaft is penetrated between the first fixed block and the second fixed block, a lead screw coupling is arranged on one side of the first connecting part and connected with the first connecting shaft, one side of the first connecting part is arranged between the first fixed block and the second fixed block, and the first adjusting spring is sleeved on the first connecting shaft and arranged between the second fixed block and the lead screw coupling. By rotating the first connecting shaft, the lead screw coupling can drive the first connecting part to rise or fall, thereby adjusting the lifting of the baffle to control the height of the baffle.

[0012] Further, the first groove and the second groove are formed in the fixed seat, the first fixed block and the second fixed block are respectively inserted into the first groove and the second groove and fixedly connected with the fixed seat. By setting the first groove and the second groove, the installation of the first fixed block and the second fixed block can be more stable, and shaking is not easy to occur, so as to ensure the stable operation of the baffle.

[0013] Further, the first connecting part and the second connecting part are arranged vertically, the arrangement direction of the baffle is perpendicular to the direction of the first connecting part, and a reinforcing part is arranged between the first connecting part and the second connecting part. The reinforcing part can increase the strength of the second supporting seat, and the bending of the second supporting seat can be avoided. The vertical arrangement of the first connecting part and the second connecting part can make the baffle perpendicular to the first connecting part, and the height of the baffle can be adjusted accurately.

[0014] Further, the first supporting seat is provided with a mounting inner cavity, and the baffle is movably arranged in the mounting inner cavity through the rotating shaft. The mounting inner cavity can ensure that the axial movement of the baffle is not affected by other components.

[0015] Further, the pressure auxiliary mechanism comprises a first adjusting nut, an adjusting part and a second adjusting spring. One end of the first adjusting nut is a threaded end, the threaded end passes through the second supporting seat and is adjacent to the baffle, the adjusting part is provided with an internal thread matched with the threaded end, the adjusting part is sleeved on the threaded end, the second adjusting spring is sleeved on the threaded end, and one end of the second adjusting spring is connected with the adjusting part. The first adjusting nut is twisted to drive the adjusting part to move forward or backward, so that the second adjusting spring is compressed forward and abuts against the baffle, or the second adjusting spring is loosened to reduce the pressing force on the baffle.

[0016] Further, the pressure auxiliary mechanism further comprises a second adjusting nut, the second adjusting nut is adjacent to the baffle on the other side of the first supporting seat away from the first adjusting nut, and the first adjusting nut and the second adjusting nut are on the same horizontal line. The second adjusting nut can be used to abut against the other end of the baffle to prevent the other end of the baffle from rotating towards the second adjusting nut, and only rotate towards the second adjusting spring under force.

[0017] Further, the first supporting seat further comprises an outer cover, and the outer cover covers the mounting inner cavity. The outer cover is used for covering the pressure auxiliary mechanism and part of the baffle, so as to avoid the interference of other parts on the operation of the pressure auxiliary mechanism and the baffle.

[0018] Further, the utility model further comprises a fixing shaft plate, the fixing shaft plate is fixedly connected below the fixing seat, the fixing shaft plate is provided with a connecting shaft slot for external connection, an opening is arranged on the lower side of the connecting shaft slot, and a closing part for closing the opening is arranged on the opening, and a locking hole for penetrating a bolt is arranged on the closing part. The fixing shaft plate can facilitate the installation of the utility model, and can better cooperate with other mechanisms.

[0019] Compared with the prior art, the utility model has the following advantages: the utility model can timely check and select the virtual welding lug, reduce the influence on the production efficiency of the battery, ensure the yield of the lug welding, and avoid a large number of rework and cost increase caused by flowing into the subsequent process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an ultrasonic fault soldering detection device for the tabs of a soft-pack lithium-ion battery according to this utility model.

[0022] Figure 2 yes Figure 1 A partially exploded diagram from another perspective;

[0023] Figure 3 yes Figure 2 Side view diagram with the outer cover hidden;

[0024] Figure 4 This is a schematic diagram of the cooperation between this utility model and welding.

[0025] The diagram includes:

[0026] 1. Fixed base; 11. Fixed shaft plate; 111. Connecting shaft groove; 112. Opening; 113. Closing part; 114. Locking hole; 12. First groove; 13. Second groove; 2. Height adjustment mechanism; 21. First fixing block; 22. Second fixing block; 23. First adjusting spring; 24. First mounting hole; 25. First connecting shaft; 3. First support base; 31. Mounting cavity; 311. Outer cover; 4. Measuring device; 5. Second support base; 51. First connecting part; 511. Screw coupling; 52. Second connecting part; 53. Reinforcing part; 6. Baffle; 7. Pressure auxiliary mechanism; 71. First adjusting nut; 72. Adjusting component; 73. Second adjusting spring; 74. Second adjusting nut; 8. Welding mechanism; 81. Transmission roller; 91. Electrode ear; 9. Electrode plate. Detailed Implementation

[0027] The technical solution of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as described in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0029] In addition, if the description of "first", "second", etc. is involved in the embodiments of the present application, the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features.

[0030] Please refer to Figures 1 to 3 The embodiment of the present application provides a kind of soft package lithium ion battery tab ultrasonic wave false welding detection device, including fixed seat 1, the height adjusting mechanism 2 of one side with fixed seat 1 connection and the first support base 3 of the other side with height adjusting mechanism 2 connection;

[0031] As Figure 1 And Figure 2 As shown in fixed seat 1, measurement device 4 is set, and measurement device 4 is micrometer;In order to facilitate the installation of the present embodiment, the present example also includes fixed shaft plate 11, and fixed shaft plate 11 is fixedly connected to the lower side of fixed seat 1, and fixed shaft plate 11 is provided with connecting shaft slot 111 for external connection, opening 112 is arranged on the lower side of connecting shaft slot 111, and closing part 113 for closing opening 112 is arranged, and locking hole 114 for threading bolt is arranged on closing part 113.

[0032] The height adjusting mechanism 2 in the embodiment is arranged below the measuring device 4 and abuts against the measuring device 4. Specifically, the height adjusting mechanism 2 comprises a first fixed block 21, a second fixed block 22 and a first adjusting spring 23. First and second recesses 12 and 13 are formed in the fixed seat 1 in a spaced-apart manner from top to bottom. The first and second fixed blocks 21 and 22 are respectively inserted into the first and second recesses 12 and 13 and fixedly connected to the fixed seat 1 by screws. In the embodiment, a second support seat 5 is further arranged between the height adjusting mechanism 2 and the first support seat 3. The second support seat 5 is provided with a first connecting portion 51 and a second connecting portion 52. The first connecting portion 51 is connected to the height adjusting mechanism 2, and the second connecting portion 52 is connected to the first support seat 3. Matching first mounting holes 24 are respectively arranged on the first and second fixed blocks 21 and 22. A first connecting shaft 25 is inserted through the first mounting holes 24. The two ends of the first connecting shaft 25 are rotatably arranged in the first mounting holes 24. A screw thread is arranged in the middle of the first connecting shaft 25. A screw rod coupling 511 is arranged on one side of the first connecting portion 51 and connected to the first connecting shaft 25. The first connecting portion 51 is arranged between the first and second fixed blocks 21 and 22. The first adjusting spring 23 is sleeved on the first connecting shaft 25 and arranged between the second fixed block 22 and the screw rod coupling 511. The first adjusting spring 23 can keep the first connecting portion 51 upward and avoid the second support seat 5 from falling down and damaging the parts during operation.

[0033] A rotatable baffle 6 is arranged on the first support seat 3. The lower end of the baffle 6 extends below the first support seat 3. The middle part of the baffle 6 is connected to a pressure auxiliary mechanism 7.

[0034] In order to accurately control the height of the baffle 6 by the height adjusting mechanism 2, the first and second connecting portions 51 and 52 are arranged in a vertical manner in the embodiment. The arrangement direction of the baffle 6 is perpendicular to the direction of the first connecting portion 51. In particular, a reinforcing portion 53 is arranged between the first and second connecting portions 51 and 52. The reinforcing portion 53 can increase the strength of the second support seat 5 and avoid bending. The vertical arrangement of the first and second connecting portions 51 and 52 enables the baffle 6 to be perpendicular to the first connecting portion 51, which is beneficial to accurately adjust the height of the baffle 6.

[0035] As Figure 2 and Figure 3As shown, in the present embodiment, the first support base 3 is provided with a mounting inner cavity 31, the baffle 6 is movably mounted in the mounting inner cavity 31 through a rotating shaft, and the pressure auxiliary mechanism 7 is also arranged in the mounting inner cavity 31. The lower end of the mounting inner cavity 31 is of an open structure, so that the end of the baffle 6 can pass out and the rotation of the baffle 6 is not limited. In order to facilitate the installation of the rotating shaft and the pressure auxiliary mechanism 7, an outer cover 311 is connected to one side of the mounting inner cavity 31, and the outer cover 311 wraps the mounting inner cavity 31. The outer cover 311 is used for wrapping the pressure auxiliary mechanism 7 and the baffle 6, so as to avoid the interference of other parts on the operation of the pressure auxiliary mechanism 7 and the baffle 6.

[0036] The pressure auxiliary mechanism 7 is arranged for controlling the blocking force of the baffle 6. The pressure auxiliary mechanism 7 comprises a first adjusting nut 71, an adjusting piece 72 and a second adjusting spring 73. One end of the first adjusting nut 71 is a threaded end, the threaded end is adjacent to the baffle 6 through the second support base 5, the adjusting piece 72 is provided with an inner thread matched with the threaded end, the adjusting piece 72 is sleeved on the threaded end, and the second adjusting spring 73 is sleeved on the threaded end, and one end of the second adjusting spring 73 is connected with the adjusting piece 72. In order to cooperate with the operation of the second adjusting spring 73, the pressure auxiliary mechanism 7 of the present embodiment further comprises a second adjusting nut 74. The second adjusting nut 74 is arranged on the other side of the first support base 3 away from the first adjusting nut 71 and abuts against the baffle 6, and the first adjusting nut 71 and the second adjusting nut 74 are on the same horizontal line. The second adjusting nut 74 can be used for pressing the other end of the baffle 6 to prevent it from rotating in the direction of the second adjusting nut 74, and only rotating in the direction of the second adjusting spring 73 when being forced.

[0037] The working principle of the utility model is briefly described as follows, Figure 3As shown, the utility model discloses a fixed axle plate 11 is installed on the one side of transmission roller 81, make it be placed in the rear of welding mechanism 8, before production through the adjustment of first connecting shaft 25 adjustment second support base 5's lifting, adjust the gap between baffle 6 and transmission roller 81 to the appropriate size, the thickness (D) of pole piece 9 ≤ gap ≤ the thickness (E) of tab 91, detect through micrometer;Then adjust first adjusting nut 71, make it drive adjusting part 72 compress second adjusting spring 73, so that the elasticity of baffle 6 is 3N, namely second adjusting spring 73 with 3N force against baffle 6, because second adjusting nut 74 against the other side of baffle 6, make baffle 6 only rotate to the direction of second adjusting spring 73, so if need baffle 6 rotate when the strength of pushing baffle 6 needs greater than or equal to 3N;When welding mechanism 8 completes the welding of tab 91, transmission roller 81 rotates and drives pole piece 9 to move, when tab 91 passes transmission roller 81, because the gap between baffle 6 and transmission roller 81 is less than the thickness of tab 91, at this time make tab 91 and pole piece 9 exist a mutual pulling force between each other.Because the welding between the tab 91 of virtual welding and pole piece 9 is not firm, the adhesion between the tab 91 of virtual welding and pole piece 9 is generally less than 3N, under the pulling of baffle 6 and pole piece 9 in transmission roller 81, will make tab 91 deviate from pole piece 9, even fall off, so that the tab 91 of virtual welding can be found in time.

[0038] And the connection between the tab 91 without virtual welding and pole piece 9 is relatively firm, the adhesion between the tab 91 without virtual welding and pole piece 9 is greater than 5N, and the elasticity of pole piece 9 given by second adjusting spring 73 is 3N, when transmission roller 81 continues to drive pole piece 9 to move, make tab 91 push baffle 6 rotate along the axial direction, make baffle 6 compress second adjusting spring 73 and rotate upwards, increase the gap between baffle 6 and transmission roller 81, and tab 91 is blocked by baffle 6 of virtual welding detection device to continue the virtual welding inspection of next tab 91.

[0039] The above is only preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A soft package lithium ion battery tab ultrasonic false welding detection device, characterized in that, The utility model relates to a height adjusting mechanism for measuring device, including: The fixed seat (1) is provided with measuring device (4) on the fixed seat (1); One side is connected with the fixed seat (1) height adjusting mechanism (2), height adjusting mechanism (2) are set up below measuring device (4), and height adjusting mechanism (2) with measuring device (4) abut; With the other side of height adjusting mechanism (2) is connected with the first support seat (3), is provided with rotatable baffle (6) on the first support seat (3), the lower end of baffle (6) extends to the first support seat (3) below, and the middle part position of baffle (6) is connected with pressure auxiliary mechanism (7).

2. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 1, characterized in that, Also including second support seat (5), the first connecting portion (51) and the second connecting portion (52) are equipped with second support seat (5), the first connecting portion (51) is connected with height adjusting mechanism (2), and the second connecting portion (52) is connected with the first support seat (3).

3. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 2, characterized in that, Height adjusting mechanism (2) includes first fixed block (21), second fixed block (22) and first adjusting spring (23), and the first fixed block (21) and second fixed block (22) are respectively fixed with the fixed seat (1) from top to bottom, the first fixed block (21) and second fixed block (22) are penetrated with first connecting shaft (25), one side of the first connecting portion (51) is provided with screw rod coupling (511) and is connected with the first connecting shaft (25), so that one side of the first connecting portion (51) is arranged between the first fixed block (21) and the second fixed block (22), and the first adjusting spring (23) is sleeved on the first connecting shaft (25) and is arranged between the second fixed block (22) and the screw rod coupling (511).

4. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 3, characterized in that, The first fixed block (21) and second fixed block (22) are respectively inserted in the first recess (12) and second recess (13) and are fixedly connected with the fixed seat (1).

5. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 2, characterized in that, The first connecting portion (51) and the second connecting portion (52) are vertically arranged, so that the setting direction of the baffle (6) is perpendicular to the direction of the first connecting portion (51), and a reinforcing portion (53) is arranged between the first connecting portion (51) and the second connecting portion (52).

6. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 2, characterized in that, The first support seat (3) is provided with a mounting cavity (31), and the baffle (6) is movably mounted in the mounting cavity (31) through the rotating shaft.

7. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 6, characterized in that, The pressure auxiliary mechanism (7) includes a first adjusting nut (71), an adjusting member (72), and a second adjusting spring (73), one end of the first adjusting nut (71) is a threaded end, the threaded end passes through the second support seat (5) and is adjacent to the baffle (6), the adjusting member (72) is provided with an internal thread matched with the threaded end, the adjusting member (72) is sleeved on the threaded end, the second adjusting spring (73) is sleeved on the threaded end, and one end of the second adjusting spring (73) is connected with the adjusting member (72).

8. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 7, characterized in that, The pressure auxiliary mechanism (7) further comprises a second adjusting nut (74) which is in abutment with the baffle (6) on the other side of the first support base (3) away from the first adjusting nut (71), and the first adjusting nut (71) and the second adjusting nut (74) are in the same horizontal line.

9. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device according to claim 8, characterized in that, The first support base (3) further comprises an outer cover (311) which wraps the mounting inner cavity (31).

10. The soft-pack lithium-ion battery tab ultrasonic false-brazing detection device of claim 1, wherein, Further comprising a fixed shaft plate (11) which is fixedly connected below the fixed base (1), the fixed shaft plate (11) is provided with a connecting shaft slot (111) for external connection, the lower side of the connecting shaft slot (111) is provided with an opening (112) and a closing part (113) for closing the opening (112), and the closing part (113) is provided with a locking hole (114) for penetrating a bolt.

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