Device for improving through-wall welding quality stability of storage battery

Abstract

The utility model discloses a device for improving the stability of the through-wall welding quality of a storage battery, which comprises a welding hole position measuring component, a welding spot indentation component and a middle pole welding tool, the welding hole position measuring component is used for accurately measuring the position of a through-wall welding hole of a storage battery groove, the welding spot indentation component is used for adjusting the coordinate axis position of a through-wall welding spot, and the middle pole welding tool is used for welding the through-wall welding spot. On-line adjustment and welding are conducted on the position of the middle pole through the pole group middle pole welding tool, it is finally guaranteed that the welding face of the middle pole, a through-wall welding point and the position of a shell through-wall welding hole are centered and aligned, the consistency of through-wall welding resistance of a storage battery is guaranteed, and therefore the through-wall welding quality stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and particularly relates to a device for improving the quality stability of the through-wall welding of batteries. Background Art

[0002] The series connection between each monomer of lead-acid batteries mainly adopts the through-wall welding method. The quality of through-wall welding directly affects the quality of the battery. However, as a special process, it is prone to defects such as false welding, lead spattering, and air holes in through-wall welding, resulting in problems such as open welding of solder joints and increased internal resistance of the battery during use, thus causing battery scrapping and seriously affecting the service life of the battery. The quality of through-wall welding determines the reliability and life of the battery. Therefore, the quality of through-wall welding is an important process in battery production and manufacturing.

[0003] The key influencing factor for the quality of battery through-wall welding is the resistance R (R = 2Rn + Rz + 2Rzj), where Rn is the internal resistance of the middle pole column (Ω), Rz is the contact resistance between the two middle pole columns (Ω), and Rzj is the contact resistance between the welding head and the middle pole column (Ω). The alignment degree of the through-wall welding point, the welding surface of the middle pole column, and the through-wall welding hole of the housing during the through-wall welding process is the main factor affecting the consistency of the through-wall welding resistance.

[0004] At present, in the industry, the method of adjusting the alignment of the welding surface of the middle pole column, the through-wall welding point, and the position of the through-wall welding hole of the housing: When casting and welding the battery pole group at the start of production, the middle pole columns of the pole group are aligned and placed at the position of the through-wall welding hole of the housing. The through-wall welding machine's welding point presses the middle pole column, and the alignment position of the three is adjusted through the indentation of the middle pole column welding point.

[0005] Since it is impossible to accurately adjust the position of the through-wall welding point (x, y, z) axis through the indentation of the middle pole column welding point during the start-up production of the battery, and the positions of the through-wall welding hole of the housing and the middle pole column often fluctuate during the production process, resulting in poor resistance stability during the through-wall welding process and the welding quality being prone to quality defects such as false welding, lead spattering, and air holes.

[0006] Therefore, how to provide a device for improving the quality stability of the through-wall welding of batteries is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0007] In view of this, the utility model provides a device for improving the quality stability of the through-wall welding of batteries, which ensures the alignment of the through-wall welding point, the welding surface of the middle pole column, and the through-wall welding hole of the housing during the through-wall welding process, and avoids the occurrence of situations such as false welding, lead spattering, and air holes in through-wall welding.

[0008] In order to achieve the above object, the utility model adopts the following technical scheme: A device for improving the quality stability of the through-wall welding of batteries, which comprises:

[0009] Welding hole position measuring component, which is used to accurately measure the position coordinates of the through-wall welding holes of the battery case;

[0010] Welding point indentation component, which marks an indentation on the edge of the through-wall welding hole;

[0011] Intermediate pole welding tooling, which is provided with an intermediate pole adjusting component and a through-wall welding point component. The intermediate pole adjusting component adjusts the central position of the intermediate pole in the pole group and the through-wall welding hole based on the position coordinates of the through-wall welding hole. The through-wall welding point component is located on both outer sides of the intermediate pole adjusting component. The welding point indentation component is detachably connected to the through-wall welding point component. The through-wall welding point component adjusts the coordinates of the through-wall welding point to be aligned with the center of the through-wall welding hole by relying on the indentation marked on the edge of the through-wall welding hole by the welding point indentation component, and makes the welding surface of the intermediate pole, the through-wall welding point, and the through-wall welding hole be centered and aligned.

[0012] The beneficial effects of the present utility model are as follows: The present utility model improves the quality stability of the through-wall welding of the battery by relying on the welding hole position measuring component, the welding point indentation component, and the intermediate pole welding tooling. First, the welding hole position measuring component is used to accurately measure the position of the through-wall welding hole of the battery case, aiming to ensure that the position parameters of the through-wall welding hole meet the requirements of the drawing, so as to ensure the position requirements of the intermediate pole in the pole group in the subsequent process. The welding point indentation component is used to assist in adjusting the position of the through-wall welding point on the (x, y, z) axes. In fact, it uses the indentation on the edge of the through-wall welding hole by the welding point indentation component to align the center position of the through-wall welding point. The intermediate pole welding tooling for the pole group adjusts the position of the intermediate pole online and welds it, finally ensuring that the welding surface of the intermediate pole, the through-wall welding point, and the position of the through-wall welding hole on the shell are centered and aligned, ensuring the consistency of the through-wall welding resistance of the battery, and thus improving the quality stability of the through-wall welding.

[0013] Preferably, the welding hole position measuring component includes a positioning sleeve seat, an x-axis measuring part, and a y-axis measuring part. A welding hole chuck that can be inserted into the through-wall welding hole is provided on the outer side wall of the positioning sleeve seat. An observation hole for observing the scale of the y-axis measuring part is also provided on the positioning sleeve seat. The x-axis measuring part includes an x-axis fixed scale and an x-axis moving scale. The x-axis fixed scale is fixed at both ends of the positioning sleeve seat. There are two groups of x-axis moving scales, which are respectively slidably connected to the x-axis fixed scales on both sides of the positioning sleeve seat. An x-axis dimension positioning point for restricting the sliding position of the x-axis moving scale on the x-axis fixed scale is provided on the x-axis moving scale. The y-axis moving scale in the y-axis measuring part is slidably connected to the positioning sleeve seat. A y-axis dimension positioning point for restricting the relative sliding position of the positioning sleeve seat and the y-axis moving scale is provided on the positioning sleeve seat.

[0014] The beneficial effects generated therefrom are as follows: The connection with the through-wall welding hole is achieved by using the welding hole chuck on the positioning socket. Then, the x-axis moving scale and the y-axis moving scale are respectively adjusted in sequence to contact the battery slot wall at the corresponding end, and then readings are taken to obtain the coordinate position of the through-wall welding hole, and based on this, it is judged whether the requirements of the drawing are met.

[0015] Preferably, the solder joint indentation assembly includes a connecting seat, an indentation sleeve, and an indentation core. The connecting seat is connected to the through-wall welding solder joint component. The indentation sleeve is fixed on the side of the connecting seat away from the through-wall welding solder joint component. The indentation core is embedded in the indentation sleeve. Pigment is smeared on the pressing surface of the indentation core. The outer contour shape of the indentation core is similar to the shape of the through-wall welding hole, and the pressing surface of the indentation core is larger than the hole surface of the through-wall welding hole.

[0016] The technical effects generated therefrom are as follows: The solder joint indentation assembly establishes a connection relationship with the through-wall welding solder joint, and the position coordinates of the through-wall welding solder joint are adjusted depending on the indentation mark of the solder joint indentation assembly at the edge of the through-wall welding hole.

[0017] Preferably, the indentation sleeve is of an oval structure. The inner side wall of the indentation sleeve is flared from one end to the other end. The indentation core is formed of polytetrafluoroethylene material. The outer contour shape of the indentation core is oval. The outer side wall of the indentation core is tapered from one end to the other end. The indentation core is adaptively embedded inside the indentation sleeve.

[0018] The technical effects generated therefrom are as follows: In specific implementation, the purpose of the indentation sleeve is to provide an installation basis for the indentation core. The indentation core is made of a soft material. In specific implementation, a red mark is smeared on the indentation core. The position coordinates of the through-wall welding solder joint are compared depending on the indentation mark of the indentation core at the edge of the through-wall welding hole. Specifically, the indentation core is also of an oval structure, and its outer contour area is larger than the hole area of the through-wall welding hole. The position of the through-wall welding solder joint is adjusted depending on the concentricity of the oval indentation mark and the welding hole. It can be understood that the indentation core is a frustum of a cone structure with an oval shape.

[0019] Preferably, the intermediate pole welding tooling includes a through-wall welding clamp, a clamp fixing shaft, a clamp shaft cylinder, an intermediate pole adjusting component, and a through-wall welding solder joint component. The clamp fixing shaft is fixed on the top of the through-wall welding clamp. The clamp shaft cylinder is fixed on the clamp fixing shaft and controls the up and down movement of the through-wall welding clamp. The clamp shaft cylinder is fixed on an external moving table. The intermediate pole adjusting component is connected to the middle of the inner bottom wall of the through-wall welding clamp in a vertically movable manner. There are two groups of through-wall welding solder joint components and they are distributed on the two inner side walls of the through-wall welding clamp. The through-wall welding solder joint component is provided with a solder joint base slot and a through-wall welding solder joint. The solder joint base slot is clamped with the base card on the connecting seat. The center of the through-wall welding solder joint is collinear with the center of the indentation core.

[0020] The resulting technical effects are as follows: The downward movement of the through-wall welding clamp is adjusted by relying on the through-wall welding clamp. The through-wall welding solder joint assembly is located on the two inner side walls of the through-wall welding clamp, and the intermediate pole column adjustment component is installed at the middle position of the inner bottom wall of the through-wall welding clamp, facilitating the adjustment of the position of the intermediate pole column in the pole group. Similarly, the through-wall welding solder joint component also provides an installation basis for the solder joint indentation component, and the position of the through-wall welding solder joint is adjusted by using the solder joint indentation component.

[0021] Preferably, the intermediate pole column adjustment component includes a bracket, a push plate cylinder, and a push plate. The bracket is connected to the middle of the inner bottom wall of the through-wall welding clamp through a lifting cylinder. The bracket is a U-shaped structural frame. Two support plates are respectively provided opposite to the two ends of the bracket. The push plate cylinders are grouped in pairs and are correspondingly installed inside the two support plates at the same end. The push plate is fixed on the push plate cylinder. The two push plates on the closer side cooperate to adjust the center position of the intermediate pole column in the pole group and align it with the center position of the through-wall welding hole. The push plate cylinder controls the moving stroke of the push plate. At the maximum stroke when the two push plates on the closer side are approaching, there is the maximum dimension in the width direction of the intermediate pole column.

[0022] The resulting technical effects are as follows: The position of the intermediate pole column is adjusted by relying on the two push plates in the intermediate pole column adjustment component, so as to ensure that the center position of the intermediate pole column is aligned with the center position of the through-wall welding hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the intermediate pole column welding tooling for a device for improving the quality stability of the through-wall welding of a storage battery according to the present invention;

[0024] Figure 2 Application diagram of the intermediate pole column welding tooling for a device for improving the quality stability of the through-wall welding of a storage battery according to the present invention;

[0025] Figure 3 Schematic diagram of the welding hole position measuring component for a device for improving the quality stability of the through-wall welding of a storage battery according to the present invention;

[0026] Figure 4 is Figure 3 partial structure diagram;

[0027] Figure 5 Schematic diagram of the solder joint indentation component for a device for improving the quality stability of the through-wall welding of a storage battery according to the present invention;

[0028] Figure 6 Schematic diagram of the storage battery cell used in the present invention.

[0029] 1 Welding hole position measuring assembly, 11 positioning socket base, 12 x-axis measuring part, 121 x-axis fixed scale, 122 x-axis moving scale, 123 x-axis dimension positioning point, 13 y-axis measuring part, 131 y-axis moving scale, 132 y-axis dimension positioning point, 14 welding hole chuck, 2 Welding point indentation assembly, 21 connecting seat, 22 indentation sleeve, 23 indentation core, 24 base clamping point, 3 Intermediate pole column welding tooling, 31 through-wall welding clamp, 32 clamp fixed shaft, 33 clamp shaft cylinder, 34 Intermediate pole column adjustment component, 341 bracket, 342 push plate cylinder, 343 push plate, 344 support plate, 35 Through-wall welding point component, 351 welding point base card slot, 352 through-wall welding point, 4 Battery trough, 5 Through-wall welding hole. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Refer to the attached drawings of the present invention Figures 1 to 6 , according to an apparatus for improving the quality stability of the through-wall welding of a battery in an embodiment of the present invention, which includes:

[0032] A welding hole position measuring assembly 1, which is used to accurately measure the position coordinates of the through-wall welding hole 5 of the battery trough 4;

[0033] A welding point indentation assembly 2, which marks an indentation on the edge of the through-wall welding hole, aiming to assist in adjusting the position coordinates of the through-wall welding point;

[0034] An intermediate pole column welding tooling 3, which is provided with an intermediate pole column adjustment component 34 and a through-wall welding point component 35. The intermediate pole column adjustment component 34 adjusts the central position of the intermediate pole column in the pole group and the through-wall welding hole 5 based on the position coordinates of the through-wall welding hole 5. The through-wall welding point component 35 is located on both outer sides of the intermediate pole column adjustment component 34. The welding point indentation assembly 2 is detachably connected to the through-wall welding point component 35. The through-wall welding point component 35 adjusts the coordinates of the through-wall welding point to be aligned with the center of the through-wall welding hole according to the indentation marked on the edge of the through-wall welding hole by the welding point indentation assembly 2, and makes the intermediate pole column welding surface, the through-wall welding point, and the through-wall welding hole centered and aligned with each other.

[0035] In some other embodiments, the welding hole position measuring assembly 1 includes a positioning socket 11, an x-axis measuring part 12 and a y-axis measuring part 13. A welding hole chuck 14 that can be embedded into the wall-penetrating welding hole 5 is provided on the outer side wall of the positioning socket 11, and a y-axis measuring part scale observation hole is provided on the inner wall. The x-axis measuring part 12 includes an x-axis fixed scale 121 and an x-axis moving scale 122. The x-axis fixed scale 121 is fixed at both ends of the positioning socket 11. There are two groups of x-axis moving scales 122 which are respectively slidably connected to the x-axis fixed scales 121 on both sides of the positioning socket 11. An x-axis dimension positioning point 123 for restricting the sliding position of the x-axis moving scale 122 on the x-axis fixed scale 121 is provided on the x-axis moving scale 122. The y-axis moving scale 131 in the y-axis measuring part 13 is slidably connected to the positioning socket 11, and a y-axis dimension positioning point 132 for restricting the relative sliding position of the positioning socket and the y-axis moving scale 131 is provided on the positioning socket 11. It should be noted that scale lines are provided on the x-axis moving scale, the x-axis fixed scale, and the y-axis moving scale.

[0036] In some other embodiments, the solder joint indentation assembly 2 includes a connecting seat 21, an indentation sleeve 22 and an indentation core 23. The connecting seat 21 is connected to the wall-penetrating welding solder joint component 35. The indentation sleeve 22 is fixed on the side of the connecting seat 21 away from the wall-penetrating welding solder joint component 35. The indentation core 23 is embedded in the indentation sleeve 22. Pigment is applied on the pressing surface of the indentation core 23. The outer contour shape of the indentation core 23 is the same as the shape of the wall-penetrating welding hole 5, both being oval, and the pressing surface of the indentation core 23 is larger than the hole surface of the wall-penetrating welding hole.

[0037] In some other embodiments, the indentation sleeve 22 is of an oval structure. The inner side wall of the indentation sleeve 22 is flared from one end to the other end. The indentation core 23 is formed of polytetrafluoroethylene material. The outer contour shape of the indentation core 23 is oval. The outer side wall of the indentation core 23 is tapered from one end to the other end. The indentation core 23 is adaptively embedded in the interior of the indentation sleeve 22. In specific implementation, the indentation core is made of a soft material, its shape is similar to an oval frustum structure, the slope of its outer wall surface is 5°, and it can be reused. The specifications of the small oval end of the indentation core are φ11×16, and the specifications of the large oval end are φ13×18.

[0038] The inner oval specifications of the indentation sleeve are φ11×16, and the outer oval specifications are φ13×18. It can be understood that the inner side wall of the indentation sleeve is flared from one end to the other end, which fits the shape of the indentation core.

[0039] In some other specific embodiments, the intermediate pole welding tooling 3 includes a through-wall welding clamp 31, a clamp fixing shaft 32, a clamp shaft cylinder 33, an intermediate pole adjusting component 34 and a through-wall welding solder joint component 35. The clamp fixing shaft 32 is fixed on the top of the through-wall welding clamp 31. The clamp shaft cylinder 33 is fixed on the clamp fixing shaft 32 and controls the up and down movement of the through-wall welding clamp 31. The clamp shaft cylinder 33 is fixed on an external moving table. The intermediate pole adjusting component 34 is connected to the middle of the inner bottom wall of the through-wall welding clamp 31 in a vertically lifting manner. There are two groups of through-wall welding solder joint components 35, which are distributed on the two inner side walls of the through-wall welding clamp 31. The through-wall welding solder joint component 35 is provided with a solder joint base card slot 351 and a through-wall welding solder joint 352. The solder joint base card slot 351 is clamped with the base clamping point 24 on the connecting seat. After installation, the centers of the through-wall welding solder joints 352 are collinear with the center of the indentation core 23.

[0040] In some other embodiments, the intermediate pole adjusting component 34 includes a bracket 341, a push plate cylinder 342 and a push plate 343. The bracket 341 is connected to the middle of the inner bottom wall of the through-wall welding clamp 31 through a lifting cylinder. The bracket 341 is a U-shaped structural frame. Two support plates 344 are respectively provided oppositely at both ends of the bracket 341. The push plate cylinders 342 are in groups of two and are correspondingly installed on the inner sides of the two support plates at the same end. The push plate 343 is fixed on the push plate cylinder 342. The two push plates on the closer side cooperate to adjust the center position of the intermediate pole in the pole group and align it with the center position of the through-wall welding hole. The push plate cylinder 342 controls the moving stroke of the push plate 343. The two push plates on the closer side have the maximum dimension in the width direction of the intermediate pole at the maximum stroke when approaching each other.

[0041] During specific implementation, after the push plates are pushed to the set stroke, the distance between the two push plates is the maximum dimension in the width direction of the intermediate pole, which is beneficial to arranging the position of the intermediate pole in the pole group.

[0042] After the above single-sided push plates are pushed to the set stroke, the push plates just contact the widest point of the intermediate pole.

[0043] A method for improving the quality stability of the through-wall welding of a storage battery uses the above device and includes the following steps:

[0044] Step 1: Measure the position of the through-wall welding holes of the storage battery cell. Select the storage battery cells with the through-wall welding holes completed in the same batch, and use the welding hole position measuring component to measure the position of the through-wall welding holes. Read the measurement data on the x-axis and y-axis, and check whether it is consistent with the drawing size requirements of the through-wall welding hole position of the storage battery cell. After the dimensions in the x and y directions meet the drawing requirements, adjust the coordinate axis position of the through-wall welding solder joints.

[0045] After the adjustment of the coordinate axis position of the through-wall welding solder joints is completed, during the production process, measure the position of the through-wall welding holes of the storage battery cell every 1 h using the above-mentioned positioning tooling for measuring the position of the through-wall welding holes of the storage battery cell to ensure the stability of the position of the through-wall welding holes of the storage battery cell.

[0046] Step 2: Precision adjustment of the coordinate axes position of the through-wall welding spot. Install the welding spot indentation component on the through-wall welding spot of the through-wall welding spot component. Use the through-wall welding machine to perform an air compression through-wall welding hole, so that the welding spot indentation component leaves an indentation (red mark) at the edge of the through-wall welding hole. Adjust the x and y coordinate axis position parameters of the through-wall welding spot through the concentricity between the indentation and the through-wall welding hole until the elliptical red mark and the elliptical through-wall welding hole of the battery slot are concentric. The z coordinate axis position parameter is set according to the design dimensions of the battery slot. Actually, the z-axis coordinate corresponds to the dimension in the length direction of the battery case;

[0047] Step 3: Adjustment of the position of the middle pole column in the battery pole group. Use the middle pole column adjustment component in the middle pole column welding tooling to adjust the position of the middle pole column in the battery pole group to ensure that the center position in the width direction of the middle pole column, the position of the through-wall welding spot, and the position of the through-wall welding hole are centered and aligned. After the position of the middle pole column in the pole group is adjusted in place, perform the through-wall welding of the battery, and then observe the resistance stability during the through-wall welding process.

[0048] Specifically, in Step 1, insert the welding hole chuck into the through-wall welding hole, adjust the x-axis moving ruler to top against the battery slot wall, use the x-axis dimension positioning point for positioning, adjust the y-axis moving ruler and top against the bottom of the battery slot, use the y-axis dimension positioning point for positioning, and read the values of the x-axis and y-axis to obtain the position coordinate parameters of the through-wall welding hole.

[0049] In Step 2, after installing the welding spot indentation component on the through-wall welding spot component, initially set the x, y, and z coordinate axis parameters of the through-wall welding spot. The z-axis position parameter is set according to the size of the battery case, and the x and y coordinate axis position parameters are precisely adjusted based on the welding spot indentation component.

[0050] In Step 3, after the pole group is inserted into the battery slot, the clamp shaft cylinder drives the clamp fixed shaft and the through-wall welding clamp to move downward, and the middle pole column adjustment component moves downward accordingly. After the stroke of the clamp fixed shaft reaches the position, adjust the position of the middle pole column in the pole group through the push plate in the middle pole column adjustment component to ensure that the center position in the width direction of the middle pole column, the position of the through-wall welding spot, and the position of the through-wall welding hole of the battery slot are centered and aligned.

[0051] After the position of the middle pole column in the pole group is adjusted in place, perform the through-wall welding of the battery, and then observe the resistance stability during the through-wall welding process. The resistance is controlled at A ± 15 mΩ.

[0052] This method can effectively ensure that the welding surface of the middle pole column, the through-wall welding spot, and the through-wall welding hole of the housing are centered and aligned during the through-wall welding process, improve the stability of the welding resistance during the through-wall welding process, and reduce quality defects such as false welding, lead splash, and air holes during the through-wall welding of the battery.

[0053] For the devices and usage methods disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, reference can be made to the description in the method section.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for improving the quality stability of the through-wall welding of storage batteries, characterized in that, Including: A welding hole position measuring component (1), which is used to accurately measure the position coordinates of the through-wall welding hole (5) of the battery case (4); A solder joint indentation component (2), which marks an indentation on the edge of the through-wall welding hole; An intermediate pole welding tooling (3), which is provided with an intermediate pole adjusting component (34) and a through-wall welding solder joint component (35). The intermediate pole adjusting component (34) adjusts the central position of the intermediate pole in the pole group and the through-wall welding hole (5) based on the position coordinates of the through-wall welding hole (5). The through-wall welding solder joint component (35) is located on both outer sides of the intermediate pole adjusting component (34). The solder joint indentation component (2) is detachably connected to the through-wall welding solder joint component (35). The through-wall welding solder joint component (35) adjusts the coordinates of the through-wall welding solder joint to be aligned with the center of the through-wall welding hole according to the marked indentation on the edge of the through-wall welding hole by the solder joint indentation component (2), and makes the intermediate pole welding surface, the through-wall welding solder joint, and the through-wall welding hole centered and aligned with each other.

2. The device for improving the quality stability of the battery through-wall welding according to claim 1, characterized in that, The welding hole position measuring component (1) includes a positioning sleeve base (11), an x-axis measuring part (12), and a y-axis measuring part (13). A welding hole chuck (14) that can be embedded in the through-wall welding hole (5) is provided on the outer side wall of the positioning sleeve base (11). An observation hole for observing the scale of the y-axis measuring part is also provided on the positioning sleeve base (11). The x-axis measuring part (12) includes an x-axis fixed scale (121) and an x-axis moving scale (122). The x-axis fixed scale (121) is fixed at both ends of the positioning sleeve base (11). There are two groups of x-axis moving scales (122), which are respectively slidably connected to the x-axis fixed scales (121) on both sides of the positioning sleeve base (11). An x-axis dimension positioning point (123) for restricting the sliding position of the x-axis moving scale (122) on the x-axis fixed scale (121) is provided on the x-axis moving scale (122). The y-axis moving scale (131) in the y-axis measuring part (13) is slidably connected to the positioning sleeve base (11). A y-axis dimension positioning point (132) for restricting the relative sliding position of the positioning sleeve base and the y-axis moving scale (131) is provided on the positioning sleeve base (11).

3. The device for improving the quality stability of the battery through-wall welding according to claim 1, wherein The solder joint indentation component (2) includes a connecting seat (21), an indentation sleeve (22), and an indentation core (23). The connecting seat (21) is connected to the through-wall welding solder joint component (35). The indentation sleeve (22) is fixed on the side of the connecting seat (21) away from the through-wall welding solder joint component (35). The indentation core (23) is embedded in the indentation sleeve (22). Pigment is applied to the pressing surface of the indentation core (23). The outer contour shape of the indentation core (23) is the same as the shape of the through-wall welding hole (5), and the pressing surface of the indentation core (23) is larger than the hole surface of the through-wall welding hole.

4. The device for improving the quality stability of the battery's through-wall welding according to claim 3, characterized in that, The indentation sleeve (22) is of an oval structure. The inner side wall of the indentation sleeve (22) is flared from one end to the other end. The indentation core (23) is formed of polytetrafluoroethylene material. The outer contour shape of the indentation core (23) is oval. The outer side wall of the indentation core (23) is necked down from one end to the other end. The indentation core (23) is fitted and embedded inside the indentation sleeve (22).

5. The device for improving the quality stability of the battery through-wall welding according to claim 1, characterized in that The intermediate pole column welding tooling (3) includes a through-wall welding clamp (31), a clamp fixing shaft (32), a clamp shaft cylinder (33), an intermediate pole column adjusting component (34) and a through-wall welding solder joint component (35). The clamp fixing shaft (32) is fixed on the top of the through-wall welding clamp (31). The clamp shaft cylinder (33) is fixed on the clamp fixing shaft (32) and controls the up and down movement of the through-wall welding clamp (31). The clamp shaft cylinder (33) is fixed on an external moving table. The intermediate pole column adjusting component (34) is connected to the middle of the inner bottom wall of the through-wall welding clamp (31) in a vertically lifting manner. There are two groups of the through-wall welding solder joint components (35) and they are distributed on the two inner side walls of the through-wall welding clamp (31). The through-wall welding solder joint component (35) is provided with a solder joint base card slot (351) and a through-wall welding solder joint (352). The solder joint base card slot (351) is clamped with a base clamping point (24) on the connecting seat. The center of the through-wall welding solder joint (352) is collinear with the center of the indentation core (23).

6. The device for improving the quality stability of the battery through-wall welding according to claim 5, characterized in that, The intermediate pole column adjusting component (34) includes a bracket (341), a push plate cylinder (342) and a push plate (343). The bracket (341) is connected to the middle of the inner bottom wall of the through-wall welding clamp (31) through a lifting cylinder. The bracket (341) is a U-shaped structural frame. Two support plates (344) are respectively arranged oppositely at both side ends of the bracket (341). The push plate cylinders (342) are in pairs and are correspondingly installed inside the two support plates at the same side end. The push plate (343) is fixed on the push plate cylinder (342). The two push plates on the closer side cooperate to adjust the center position of the intermediate pole column in the pole group and align it with the center position of the through-wall welding hole. The push plate cylinder (342) controls the moving stroke of the push plate (343). The two push plates on the closer side have the maximum dimension in the width direction of the intermediate pole column at the maximum stroke when approaching each other.

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