CN220259893U - Frock is used in BAR piece welding - Google Patents

Abstract

The utility model relates to the technical field of battery production equipment, and provides a fixture for welding BAR sheets, which comprises a clamping structure and a pressing structure; the clamping structure is used for clamping the battery body; one end of the clamping structure is provided with a positioning structure and a pressing structure; the positioning structure is used for positioning the BAR sheet; the distance between the pressing structure and the corresponding end face of the clamping structure is adjustable, so that the BAR sheet can be pressed on the battery body. The tool for welding the BAR sheet can solve the problems that when the BAR sheet of a battery is welded by the existing small-sized laser welding machine, the BAR sheet is easy to be positioned inaccurately and deformed, so that the battery is leaked and the virtual welding is caused.

Description

Frock is used in BAR piece welding

Technical Field

The utility model relates to the technical field of battery production equipment, in particular to a fixture for welding BAR sheets.

Background

In order to meet the requirements of cell applications and circuit connectivity during testing, existing batteries are often welded with positive battery terminals and aluminum BAR plates around the negative battery terminals; in normal production activities, the existing batteries and BAR chips are mainly welded synchronously to a large number of batteries through a special large-scale laser welding machine, so that corresponding BAR chip welding tools are designed for the large-scale laser welding machine.

However, in actual production, the condition of welding the BAR sheet by a small laser welding machine is often caused, and the positioning inaccuracy of the BAR sheet and the thermal deformation of the BAR sheet are easy to occur during welding, so that the local welding depth is too large and leakage is caused, or the warping degree of the BAR sheet is too large and various problems such as cold welding are caused.

Disclosure of Invention

The utility model aims at: solves the problems that when the existing small-sized laser welding machine is used for welding the BAR sheet of the battery, the BAR sheet is easy to be positioned inaccurately and deformed, so that the battery is leaked and the cold joint is caused, and provides a tool for welding the BAR sheet.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a BAR sheet welding tool comprises a clamping structure and a pressing structure; the clamping structure is used for clamping the battery body; one end of the clamping structure is provided with a positioning structure and a pressing structure; the positioning structure is used for positioning the BAR sheet; the distance between the pressing structure and the corresponding end face of the clamping structure is adjustable, so that the BAR sheet can be pressed on the battery body.

The clamping structure refers to the prior art, and can be a detachable fixed clamping structure or an adjustable movable clamping structure, so long as the battery body can be clamped and fixed.

The positioning structure can also be in various forms, such as a limiting protrusion or a pattern mark is processed on the holding structure, so long as the positioning structure can perform the function of positioning the BAR sheet relative to the battery body; the number, location and shape of the locating structures are determined by the specific cell body and BAR tab conditions.

The distance between the pressing structure and the clamping structure can be adjusted in various ways, such as connecting the pressing structure and the clamping structure through a linear motion mechanism, or setting a plurality of different mounting positions for the pressing structure, so that the distance between the pressing structure and the clamping structure has a plurality of choices; the compacting structure may be provided with one or more; the location where the hold down structure holds down the BAR plate is arranged according to the actual situation of the BAR plate.

The industrial tool for welding the BAR sheet is provided with a positioning structure and a pressing structure, when the industrial tool is used, the battery body is clamped through the clamping structure, the BAR sheet is placed at the corresponding end of the battery body and aligned with the positioning structure, the BAR sheet is pressed through the pressing structure, and then the BAR sheet can be welded. The positioning structure is directly arranged at one end of the clamping structure, so that the precision of the positioning structure can be ensured by the existing machining means, and the scheme is easier to obtain higher positioning precision compared with the existing visual positioning mode; and the BAR sheet is tightly pressed by the pressing structure, so that the BAR sheet can be prevented from warping in the welding process, and the problem of virtual welding of the BAR sheet is avoided.

As a preferable mode of the utility model, the clamping structure comprises a fixed structure and a movable clamping block; the position of the movable clamping block relative to the fixed structure is adjustable so as to clamp or unclamp the battery body.

The number and distribution of the movable clamping blocks and the fixed structures are determined according to the specific situation, but at least one of the movable clamping blocks and the fixed structures is adopted.

The position between the movable clamp block and the fixed structure can be adjusted in various ways, such as connecting the movable clamp block and the fixed structure by a linear motion mechanism, or providing the movable clamp block with a plurality of different mounting positions, so that the position between the movable clamp block and the fixed structure has a plurality of choices.

The scheme recommends a specific structure of the clamping structure, comprises a movable clamping block with an adjustable relative position and a fixed structure, and is compared with a detachable fixed clamping structure, the clamping structure is not required to be detached repeatedly when the battery body is detached, so that the detachment time of the battery can be reduced, and the production efficiency is improved; meanwhile, the movable clamping blocks and the fixed structures with adjustable relative positions are adopted, so that the scheme is easier to adapt to battery bodies with different sizes, such as square battery bodies with the same adapting shape but different sizes.

As a preferable mode of the utility model, the movable clamping block is connected with the fixed structure through a first screw rod; rotating the first screw can change the relative position of the movable clamp block and the fixed structure.

The number of first screws may be one or more; the first screw rod can be a common screw rod or a screw rod; the movable clamping block can be directly connected with the fixed structure through the first screw rod, can also be connected with other intermediate structures through the first screw rod, and is connected with the fixed structure through the intermediate structure, namely, is indirectly connected with the fixed structure through the first screw rod.

The scheme recommends a specific connection mode between the movable clamping block and the fixed structure, so that the position between the movable clamping block and the fixed structure is adjustable; the screw rod can convert the rotation action into linear motion, so that the scheme obtains higher adjustment precision; meanwhile, the screw rod also has self-locking capability, so that the clamping structure can be prevented from loosening under external load.

As a preferable mode of the utility model, a first spring is arranged between the movable clamping block and the fixed structure; the first spring is used for driving the movable clamping block to be close to or far away from the fixed structure.

According to the scheme, the first spring is arranged between the movable clamping block and the fixed structure, so that the movable clamping block can be prevented from corresponding shaking due to clearance fit of threads between the first screw rod and the fixed structure, the space between the movable clamping block and the fixed structure is caused to be in jumping condition corresponding to the clearance fit, and the clamping structure is ensured to be clamped reliably.

As a preferred aspect of the present utility model, the positioning structure includes a positioning groove; the location and shape of the detent matches the location and shape of the corresponding portion of the BAR tab.

The positioning structure of the scheme comprises a positioning groove, when the BAR sheet is installed, the BAR sheet can be firstly placed into the positioning groove, and then the BAR sheet is pressed by the pressing structure, so that the positioning and the fixing of the BAR sheet are realized; because the position of the positioning groove relative to the clamping structure is determined by machining, compared with other modes, such as visual positioning, the positioning mode of the scheme is easier to obtain higher positioning precision; meanwhile, the positioning grooves can limit the BAR sheet, so that the fixing effect of the BAR sheet is further ensured.

As a preferable scheme of the utility model, a positioning column is also arranged in the positioning groove; the location and shape of the locating posts match the location and shape of corresponding locating holes on the BAR plate.

The scheme corresponds to the situation that the BAR sheet is provided with the positioning hole, and the positioning column is arranged in the positioning groove, so that the positioning and fixing effects of the positioning structure on the BAR sheet can be further ensured through the matching of the positioning column and the positioning hole.

As a preferred embodiment of the present utility model, the pressing structure and the clamping structure are connected by a second screw; rotating the second screw can bring the compression structure closer to or farther from the clamping structure.

The number of second screws may be one or more; the second screw rod can be a common screw rod or a screw rod.

The scheme recommends a specific connection mode between the pressing structure and the clamping structure, so that the distance between the pressing structure and the clamping structure is adjustable; the screw rod can convert the rotation action into linear motion, so that the scheme obtains higher adjustment precision; meanwhile, the screw rod also has self-locking capability, so that the condition that the compression structure loosens under external load can be prevented.

As a preferred aspect of the present utility model, the pressing structure is slidable along the second screw; a second spring is arranged between the compression structure and the second screw rod; the second spring is used for driving the pressing structure to be close to the clamping structure.

The ability of the compression structure to slide along the second screw may be achieved in a variety of ways, such as by having the second screw in clearance fit with the wall of the corresponding bore in the compression structure; the length of the pressing structure which can slide along the second screw rod can release the abutting connection of the pressing structure to the BAR sheet, or a space for the BAR sheet to enter is reserved between the pressing structure and the clamping structure.

According to the scheme, the compression structure can slide along the second screw rod, and the second spring is arranged between the compression structure and the second screw rod, so that on one hand, the compression structure can be prevented from corresponding shaking due to clearance fit of threads between the second screw rod and the clamping structure, the gap between the compression structure and the clamping structure is caused to generate jumping corresponding to the clearance fit, and reliable fixation of the compression structure to the BAR sheet is further ensured; on the other hand, when the BAR sheet needs to be placed, an operator can directly pull the pressing structure away from the clamping structure to make room for the installation of the BAR sheet, and the distance between the pressing structure and the clamping structure is adjusted without rotating the second screw, so that the installation of the BAR sheet is more rapid and efficient.

As a preferable mode of the present utility model, a dimension of a portion of the pressing structure abutting against the BAR sheet in a width direction of the BAR sheet is Lt; the width of the BAR sheet is Wd, and the Lt/Wd is more than or equal to 2/3.

The proposal recommends that the pressing structure presses at least two thirds of the width of the BAR sheet, thereby ensuring the pressing effect of the pressing structure on the BAR sheet and preventing the BAR sheet from buckling deformation in the welding process to cause the condition of cold joint.

As a preferable mode of the present utility model, the pressing structure and the holding structure each have an insulating polymer material member; the compaction structure and the clamping structure are both in contact with the BAR sheet through the insulating polymer material member.

The specific insulating polymer material is selected according to actual conditions, such as polystyrene and polypropylene; the compressing structure and the clamping structure are provided with insulating polymer material components, the insulating polymer material components can be additionally arranged on the compressing structure and the clamping structure which are made of metal materials, and the compressing structure and the clamping structure can be integrally manufactured into the insulating polymer material components.

This scheme can ensure that the hold-down structure has sufficient structural strength with the clamping structure, can also avoid simultaneously because hold-down structure and BAR piece butt to and thereby the condition that leads to battery body positive negative pole intercommunication to send the short circuit accident when the BAR piece is placed on the clamping structure.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. the industrial tool for welding the BAR sheet is provided with a positioning structure and a pressing structure, when the industrial tool is used, the battery body is clamped through the clamping structure, the BAR sheet is placed at the corresponding end of the battery body and aligned with the positioning structure, the BAR sheet is pressed through the pressing structure, and then the BAR sheet can be welded. The positioning structure is directly arranged at one end of the clamping structure, so that the precision of the positioning structure can be ensured by the existing machining means, and the scheme is easier to obtain higher positioning precision compared with the existing visual positioning mode; and the BAR sheet is tightly pressed by the pressing structure, so that the BAR sheet can be prevented from warping in the welding process, and the problem of virtual welding of the BAR sheet is avoided.

Drawings

FIG. 1 is a schematic perspective view of a BAR chip bonding tool according to the present utility model;

FIG. 2 is a schematic front view of a BAR bonding tool according to the present utility model;

FIG. 3 is a schematic view in partial cross-section at a first screw;

FIG. 4 is a schematic partial cross-sectional view at a second screw;

icon: 1-a clamping structure; 2-compacting the structure; 3-positioning structure; 4-a battery body; 5-BAR plate; 6-a bottom plate; 11-a fixed structure; 12-a movable clamping block; 13-a first screw; 14-a first spring; 15-step screw; 21-a second screw; 22-a second spring; 31-positioning grooves; 32-positioning columns; 111-a first fixed block; 112-a second fixed block; 61-sliding grooves; 62-third fixed block.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

As shown in fig. 1 to 4, the tool for welding BAR chips adopted by the utility model comprises a clamping structure 1 and a pressing structure 2; the clamping structure 1 is used for clamping the battery body 4; one end of the clamping structure 1 is provided with a positioning structure 3 and a compacting structure 2; the positioning structure 3 is used for positioning the BAR sheet 5; the distance between the pressing structure 2 and the corresponding end face of the clamping structure 1 is adjustable, so that the BAR sheet 5 can be pressed on the battery body 4.

Specifically, the clamping structure 1 includes a fixed structure 11 and a movable clamping block 12; the distance between the movable clamping block 12 and the fixed structure 11 is adjustable so as to clamp or unclamp the battery body 4; the movable clamping block 12 is connected with the fixed structure 11 through a first screw 13; rotating the first screw 13 can bring the movable clamping block 12 closer to or further away from the fixed structure 11. For the present embodiment, as shown in fig. 1 and 2, the fixing structure 11 of the present embodiment includes two first fixing blocks 111 and one second fixing block 112; the first fixing block 111 and the second fixing block 112 are both fixed to the bottom plate 6; the bottom plate 6 is provided with a sliding groove 61, the movable clamping block 12 is in sliding connection with the sliding groove 61 so as to be close to or far away from the fixed structure 11, and when the movable clamping block 12 is abutted against the fixed structure 11, the movable clamping block 12, the first fixed block 111 and the second fixed block 112 can respectively clamp the battery body 4 from four sides of the battery body 4;

as shown in fig. 1 to 3, a third fixed block 62 is further arranged on the bottom plate 6, a first screw rod 13 is connected in the third fixed block 62 in a threaded manner, a circular boss is arranged at one end of the first screw rod 13 facing the movable clamping block 12 as shown in fig. 2, a stepped hole corresponding to the stepped shaft is arranged on the movable clamping block 12, and the circular boss is arranged in the stepped hole, so that the first screw rod 13 can only rotate along the axis of the movable clamping block 12 relatively; one end of the first screw 13, which is away from the movable clamping block 12, is provided with a handle which is convenient for an operator to rotate the first screw 13, and the rotating handle can enable the first screw 13 to rotate, so that the movable clamping block 12 is driven to be close to or far away from the third fixed block 62, and the movable clamping block 12 is driven to be close to or far away from the fixed structure 11.

As shown in fig. 1, when the battery body 4 is mounted in the present embodiment, the height of the top surface of the first fixed block 111 matches the height of the top surface of the battery body 4, and the heights of the top surfaces of the second fixed block 112 and the movable clamp block 12 are lower than the height of the top surface of the battery body 4; and the positioning structure 3 is only arranged on the first fixed block 111; the positioning structure 3 comprises a positioning groove 31; the position and shape of the positioning groove 31 match the position of the BAR sheet 5 and the shape of the corresponding portion; positioning columns 32 are also arranged in the positioning grooves 31; the location and shape of the positioning posts 32 match the location and shape of corresponding positioning holes on the BAR sheet 5; in order to prevent the battery body 4 from being shorted, the pressing structure 2 and the clamping structure 1 are both provided with insulating polymer material members and are in contact with the BAR sheet 5 through the insulating polymer material members, for the embodiment, the first fixing blocks 111 in the pressing structure 2 and the clamping structure 1 are directly in contact with the BAR sheet 5, so that the pressing structure 2 and the first fixing blocks 111 are integrally designed as insulating polymer material members, and the second fixing blocks 112 and the movable clamping blocks 12 are staggered with the top surface of the battery body 4 due to the fact that abnormal short circuit is not caused, and therefore, metal materials can be directly used to save cost and ensure firmness of fixing effect.

As shown in fig. 4, the pressing structure 2 and the clamping structure 1 are connected by a second screw 21; rotating the second screw 21 can bring the compacting structure 2 closer to or further away from the clamping structure 1; specifically, the number of the pressing structures 2 of the present embodiment is 4, two of which are connected to the upper surface of the second fixed block 112, and the other two of which are connected to the upper surface of the movable clamp block 12; when the pressing structure 2 is abutted against the BAR sheet 5, the dimension of the portion of the pressing structure 2 abutted against the BAR sheet 5 along the width direction of the BAR sheet 5 is Lt; the width of the BAR sheet 5 is Wd, and Lt/Wd is more than or equal to 2/3.

When the battery body 4 and the BAR sheet 5 are mounted, the first screw 13 and the second screw 21 are rotated, respectively, so that the clamping structure 1 and the pressing structure 2 are released, respectively; the battery body 4 is placed in the clamping structure 1, the BAR sheet 5 is placed in the positioning groove 31, and then the first screw 13 and the second screw 21 are reversely rotated, so that the clamping structure 1 and the pressing structure 2 are respectively clamped, the fixing of the battery body 4 and the BAR sheet 5 is completed, and the welding operation can be performed.

Example 2

As shown in fig. 3 and 4, on the basis of embodiment 1, a first spring 14 is provided between the movable clamp block 12 and the fixed structure 11; the first spring 14 is used for driving the movable clamping block 12 to approach or depart from the fixed structure 11; specifically, the first spring 14 is disposed between the movable clamp block 12 and the third fixed block 62; two step screws 15 are welded on one surface of the movable clamping block 12 facing the third fixed block 62; the step of the step screw 15 is provided at one end away from the movable clamp block 12; the third fixed block 62 is provided with a counter bore corresponding to the step screw 15, and the surface with larger diameter of the counter bore is provided with a surface deviating from the movable clamping block 12; the first spring 14 is disposed in the counterbore, and has one surface abutting against the counterbore and the other surface abutting against the step of the step screw 15, so that the movable clamping block 12 can be driven to move in a direction approaching the third fixed block 62, and a gap in threaded connection between the first screw 13 and the third fixed block 62 can be eliminated.

As shown in fig. 4, the pressing structure 2 can slide along the second screw 21; a second spring 22 is arranged between the pressing structure 2 and the second screw 21; the second spring 22 is used to drive the pressing structure 2 close to the clamping structure 1. Specifically, a long counter bore is formed in the compression structure 2, the first screw 13 is in clearance fit with the long counter bore, and a step is formed at one end, far away from the clamping structure 1, of the first screw 13; the second spring 22 is arranged in the long counter bore, one end of the second spring is abutted against the step of the first screw 13, and the other end of the second spring is abutted against the long counter bore, so that the pressing structure 2 can be driven to be close to the clamping structure 1; correspondingly, the side wall of the clamping structure is provided with a handle, so that an operator can lift the clamping structure conveniently.

When the BAR sheet 5 is mounted, the clamping structure is lifted directly through the handle, the BAR sheet 5 is placed in the positioning groove 31, and then the handle is released, so that the pressing structure 2 can press the BAR sheet 5 again, and the welding operation can be performed.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The fixture for welding the BAR sheet is characterized by comprising a clamping structure (1) and a pressing structure (2); the clamping structure (1) is used for clamping the battery body (4); one end of the clamping structure (1) is provided with a positioning structure (3) and a compacting structure (2); the positioning structure (3) is used for positioning the BAR sheet (5); the distance between the pressing structure (2) and the corresponding end face of the clamping structure (1) is adjustable, so that the BAR sheet (5) can be pressed on the battery body (4).

2. The BAR tab welding tooling according to claim 1, wherein the clamping structure (1) comprises a fixed structure (11) and a movable clamping block (12); the position of the movable clamping block (12) relative to the fixed structure (11) is adjustable so as to clamp or unclamp the battery body (4).

3. The BAR tab welding tooling of claim 2, wherein the movable clamp block (12) is connected to the fixed structure (11) by a first screw (13); the relative position of the movable clamping block (12) and the fixed structure (11) can be changed by rotating the first screw (13).

4. A BAR tab welding tooling according to claim 3, characterized in that a first spring (14) is arranged between the movable clamping block (12) and the fixed structure (11); the first spring (14) is used for driving the movable clamping block (12) to be close to or far away from the fixed structure (11).

5. The BAR tab bonding tool according to any of claims 1 to 4, wherein the positioning structure (3) comprises a positioning groove (31); the location and shape of the detent recess (31) matches the location and shape of the corresponding portion of the BAR tab (5).

6. The BAR sheet welding tool according to claim 5, wherein a positioning column (32) is further provided in the positioning groove (31); the location and shape of the locating posts (32) match the location and shape of corresponding locating holes on the BAR sheet (5).

7. The BAR tab welding tooling according to any one of claims 1 to 4, wherein the hold down structure (2) and the clamping structure (1) are connected by a second screw (21); the second screw (21) is rotated to enable the pressing structure (2) to be close to or far away from the clamping structure (1).

8. The BAR tab welding tooling of claim 7, wherein the hold down structure (2) is slidable along the second screw (21); a second spring (22) is arranged between the pressing structure (2) and the second screw (21); the second spring (22) is used for driving the pressing structure (2) to be close to the clamping structure (1).

9. The BAR sheet welding tool according to any one of claims 1 to 4, wherein a dimension of a portion of the pressing structure (2) abutting against the BAR sheet (5) in a width direction of the BAR sheet (5) is Lt; the width of the BAR sheet (5) is Wd, and the Lt/Wd is more than or equal to 2/3.

10. The BAR tab welding tooling according to any one of claims 1 to 4, wherein the hold down structure (2) and the clamping structure (1) each have an insulating polymeric material member; the compaction structure (2) and the clamping structure (1) are both in contact with the BAR sheet (5) through the insulating polymer material member.