CN205520065U - Welding tool for friction stir welding - Google Patents

Abstract

The utility model relates to the technical field of welding equipment, in particular to a friction stir welding welding equipment, which comprises a base for placing a battery module, an upper pressing block corresponding to the base, and first A positioning block, and a second positioning block arranged at both ends of the base, the first positioning block and the second positioning block are vertically arranged, the first positioning block is installed with a first driving cylinder, and the first The positioning block is provided with a welding groove. Compared with the prior art, the utility model has a simple and practical structure, fast assembly, fully meets the technical requirements of battery module assembly, and the tooling assembly process has a large space, which is conducive to accurate placement of the battery module and convenient operation; At the same time, when the tooling is clamped after closing, it can completely ensure the positioning of all surfaces of the battery module, and realize accurate positioning and clamping before friction stir welding of the outer frame of the battery module.

Description

A welding tool for friction stir welding

technical field

The utility model relates to the technical field of welding tooling, in particular to a tooling for welding the outer frame of a lithium battery module by friction stir welding.

Background technique

The lithium battery module is composed of multiple single cells connected in series and parallel. In order to ensure the safety and reliability of the battery, the manufactured battery module needs to be fixed and protected by an outer frame composed of end plates and side plates. As for the welding of the outer frame of the battery module, the existing technology generally adopts the cold metal transition welding technology (CMT), but the welding of CMT has defects such as prone to pores, easy to burn through, need to fill wire, and have strict welding requirements. The use of friction stir welding (FSW) welding can overcome the above defects. Among them, the welding implementation tool of friction stir welding is a stirring head, which is divided into two parts: the shaft shoulder and the stirring needle. During the welding process of friction stir welding, the stirring head rotates at high speed and descends close to the workpiece to be welded, and the stirring needle rotates at high speed and penetrates into the weld seam position until the shoulder contacts the weld surface. Therefore, the use of FSW welding can well achieve the effects of no porosity, no cracks, no burn-through, and no need for wire filling, and has low requirements for cell assembly.

As we all know, before friction stir welding, it is necessary to use fixtures to fix and limit the battery module. However, the current friction stir welding fixture cannot match the assembly process requirements of the battery module, and it mainly has the following defects: limited space on the side, not conducive to placing the battery, easy to cause bumps on the battery and damage the surface insulator, and cannot achieve accurate welding. Positioning and clamping. At the same time, the rigidity of the fixture is insufficient, and the manufactured battery module is easy to be trumpet-shaped.

In view of this, it is indeed necessary to redesign and develop the friction stir welding welding tool that meets the requirements of the battery module assembly process.

Utility model content

The purpose of the utility model is to provide a friction stir welding welding tool that meets the requirements of the battery module assembly process in view of the shortcomings of the existing tooling fixture. The tooling has a simple and practical structure, can realize fast assembly and accurate positioning, and meets the requirements for friction stir welding of battery modules.

In order to achieve the above object, the utility model adopts the following solutions:

A friction stir welding welding tool, comprising a base for placing a battery module, an upper pressing block corresponding to the base, first positioning blocks disposed on both sides of the base, and positioning blocks disposed at both ends of the base The second positioning block, the first positioning block and the second positioning block are vertically arranged, the first positioning block is installed with the first driving cylinder, and the first positioning block is provided with a welding groove.

The utility model is used for positioning and clamping before adopting friction stir welding to the battery modules. The battery cells of the battery module are placed on the base in an upside-down manner, and the upper pressing block is used to compress and limit the upper plane of the battery module; the second positioning blocks at both ends of the base are used to compress and fix the battery module The end plate of the base; the first positioning block on both sides of the base is used to press and fix the side plate of the battery module on the one hand, and the precise positioning is performed by the first driving cylinder; on the other hand, the welding groove opened by the first positioning block can make The stirring head of the friction stir welding passes through and realizes the welding of the end plate and side plate of the battery module. Therefore, the utility model is simple and practical in structure, fast in combination, and fully meets the technical requirements of battery module assembly, and the tooling assembly process has a large space, which is conducive to accurate placement of the battery module and convenient operation; at the same time, the tooling is When clamping is applied afterward, it can completely ensure that all surfaces of the battery module are positioned, realizing accurate positioning and clamping before friction stir welding of the outer frame of the battery module.

The welding tool also includes limit blocks arranged on both sides of the base, and the limit blocks are used to position the end plate and side plate of the battery module, mainly to position the end plate and the side plate in the vertical direction.

Wherein, the number of the first positioning blocks is set to be at least four, and the welding seam formed by the end plate and the side plate corresponds to the welding groove. The number of the first positioning blocks can be adjusted accordingly according to the total length of the battery module. Generally, it is set to four, which are respectively arranged at the ends of the two sides of the base, and the welding grooves correspond to the welding seams, so as to not only play the role of pressing The function of the side plate can make the stirring head be inserted into the welding groove for welding.

The width of the welding groove is greater than the width of the stirring head, so that the stirring head can pass through freely, and the height of the welding groove is greater than the height of the welding seam, so as to realize the complete welding of the welding seam.

Preferably, the shape of the first positioning block is "L", and the first driving cylinder is installed on the bottom of the first positioning block. Among them, the welding groove is opened in the middle of the "L"-shaped positioning block, and a certain width needs to be reserved at the edge of the positioning block to compress the side plate.

The upper pressing block is equipped with spring pressing heads, and the spring pressing heads are evenly distributed on the surface of the upper pressing block. Wherein, a spring pressure head is installed on the surface of the upper pressing block, which can ensure that the upper surface of the battery cell is pressed tightly, and at the same time, the battery cell will not be deformed due to excessive pressure.

The upper pressing block is connected with the rotating motor through a movable rod; wherein, the size of the upper pressing block can be adjusted according to the actual situation, the width of the upper pressing block is approximately equal to the width of the end plate, and the length of the upper pressing block is greater than the length of the side plate; The motor controls the rise or fall of the upper pressing block by driving the movable rod.

The second positioning block includes a fixed end block and a movable end block, and the movable end block is installed with a pressure sensor and a second driving cylinder. Among them, the fixed end block can play the role of positioning; the movable end block is equipped with a second drive cylinder to accurately control the total length of the battery module, and the installation of a pressure sensor can control the pressure, thereby preventing the cell from collapsing and pressure caused by too small pressure. Extrusion deformation of the cell caused by excessive size.

The base is configured as a positioning plate or a positioning bar, and the positioning plate or the positioning bar is made of insulating material. Since the battery cells of the module are placed upside down, the positioning plate or positioning bar must be made of non-conductive material to prevent the short circuit of the positive and negative poles and cause a short circuit of the battery. At the same time, it needs to have a certain rigidity, such as optional ceramic material.

Preferably, the number of the positioning strips is set to two, and the distance between the two positioning strips is equal to the distance between the positive and negative poles of the battery. Among them, the two positioning strips are placed in parallel, so that the positive and negative poles of the inverted battery just fall on the two positioning strips respectively. This setting can not only save material, but also realize good contact between the battery pole and the bottom positioning bar.

The beneficial effects of the utility model are:

The utility model is a friction stir welding welding tool, which comprises a base for placing a battery module, an upper pressing block corresponding to the base, first positioning blocks arranged on both sides of the base, and a The second positioning blocks at both ends of the base, the first positioning block and the second positioning block are vertically arranged, the first positioning block is equipped with a first driving cylinder, and the first positioning block is provided with a welding groove; wherein , the upper pressing block is used to compress and limit the upper plane of the battery module; the second positioning blocks at both ends of the base are used to compress and fix the end plates of the battery module; the first positioning blocks on both sides of the base are used on the one hand to Press and fix the side plate of the battery module, and perform precise positioning through the first driving cylinder; on the other hand, the welding groove opened allows the stirring head of the friction stir welding to pass through and realize the end plate and side plate of the battery module. welding. Therefore, the utility model is simple and practical in structure, fast in combination, and fully meets the technical requirements of battery module assembly, and the tooling assembly process has a large space, which is conducive to accurate placement of the battery module and convenient operation; at the same time, the tooling is When clamping is applied afterward, it can completely ensure that all surfaces of the battery module are positioned, realizing accurate positioning and clamping before friction stir welding of the outer frame of the battery module.

Description of drawings

Fig. 1 is one of structural representations of the utility model.

Fig. 2 is the second structural diagram of the utility model.

Fig. 3 is a schematic structural diagram of the first positioning block in the present invention.

In the figure: 1-base; 2-upper pressure block; 21-spring pressure head; 3-first positioning block; 31-first driving cylinder; 32-welding groove; 4-second positioning block; 41-fixed end block ;42-movable end block; 421-second drive cylinder; 422-pressure sensor; 5-limit block; 6-rotating motor; 61-movable rod; 7-stirring head; ;82-side panels.

detailed description

The utility model and its beneficial effects will be further described in detail below in conjunction with specific implementation methods and accompanying drawings, but the specific implementation methods of the utility model are not limited thereto.

As shown in Figures 1 to 3, a friction stir welding welding tool includes a base 1 for placing a battery module 8, an upper pressing block 2 corresponding to the base 1, and first positioning blocks arranged on both sides of the base 1 3. And the second positioning block 4 arranged at both ends of the base 1, the first positioning block 3 and the second positioning block 4 are vertically arranged, the first positioning block 3 is equipped with a first driving cylinder 31, and the first positioning block 3 is provided with Welding groove 32; also includes limit blocks 5 arranged on both sides of the base 1, the limit blocks 5 are used to position the end plate 81 and the side plate 82 of the battery module 8, mainly to position the end plate 81 and the side plate 82 in the vertical direction position on the The upper pressing block 2 is equipped with a spring pressure head 21, and the spring pressing head 21 is evenly distributed on the surface of the upper pressing block 2, and the upper pressing block 2 is connected with the rotating motor 6 by a movable rod 61; wherein, the size of the upper pressing block 2 can be according to According to the actual situation, the width of the upper pressing block 2 is approximately equal to the width of the end plate 81, and the length of the upper pressing block 2 is greater than the length of the side plate 82; The upper surface of the battery cell will not be deformed due to excessive pressure at the same time; the rotating motor 6 controls the rise or fall of the upper pressing block 2 by driving the movable rod 61 . The second positioning block 4 comprises a fixed end block 41 and a movable end block 42, and the movable end block 42 is equipped with a pressure sensor 422 and a second drive cylinder 421; wherein, the fixed end block 41 can play a positioning role; the movable end block 42 is installed The second driving cylinder 421 can precisely control the total length of the battery module 8, and the pressure sensor 422 can be installed to control the pressure, so as to prevent the collapse of the battery cell caused by too low pressure and the extrusion deformation of the battery cell caused by too high pressure.

The utility model is used for positioning and clamping before the battery module 8 is welded by friction stir welding. The cells of the battery module 8 are placed on the base 1 in an upside-down manner, and the upper pressing block 2 is used to compress and limit the upper plane of the battery module 8; the second positioning blocks 4 at both ends of the base 1 are used to press Tighten and fix the end plate 81 of the battery module 8; the first positioning blocks 3 on both sides of the base 1 are used to press and fix the side plate 82 of the battery module 8 on the one hand, and perform precise positioning through the first driving cylinder 31; On the other hand, the welding groove 32 opened by the first positioning block 3 can allow the stirring head 7 of the friction stir welding to pass through and realize the welding of the end plate 81 and the side plate 82 of the battery module 8 . Therefore, the utility model is simple and practical in structure, fast in assembly, and fully meets the technical requirements of battery module 8 assembly, and the tooling assembly process has a large space, which is conducive to accurate placement of battery module 8 and convenient operation; at the same time, the tooling When clamping is applied after closing, the positioning of all surfaces of the battery module 8 can be completely ensured, and accurate positioning and clamping of the end plate 81 and the side plate 82 of the battery module 8 before friction stir welding are realized.

Wherein, the number of the first positioning blocks 3 is set to four, and the welding seam formed by the end plate 81 and the side plate 82 corresponds to the welding groove 32 . The number of the first positioning blocks 3 can be adjusted accordingly according to the total length of the battery module 8, generally four are arranged at the ends on both sides of the base 1 respectively, and the welding grooves 32 correspond to the welding seams, so that both It plays the role of pressing the side plate 82, and enables the stirring head 7 to be inserted into the welding groove 32 for welding.

The width of the welding groove 32 is greater than the width of the stirring head 7, so that the stirring head 7 can pass through freely, and the height of the welding groove 32 is greater than the height of the welding seam, so as to realize the complete welding of the end plate 81 and the side plate 82.

Preferably, the shape of the first positioning block 3 is "L", and the first driving cylinder 31 is installed on the bottom of the first positioning block 3 . Wherein, the welding groove 32 is opened in the middle of the "L"-shaped positioning block, and a certain width needs to be reserved at the edge of the positioning block to press the side plate 82 tightly.

The base 1 is configured as a positioning plate or a positioning bar, and the positioning plate or the positioning bar are all insulating materials. Since the battery cells of the module are placed upside down, the positioning plate or positioning bar must be made of non-conductive material to prevent the short circuit of the positive and negative poles and cause a short circuit of the battery. At the same time, it needs to have a certain rigidity, such as optional ceramic material.

Preferably, the number of positioning bars is set to two, and the distance between the two positioning bars is equal to the distance between the positive and negative poles of the battery. Among them, the two positioning strips are placed in parallel, so that the positive and negative poles of the inverted battery just fall on the two positioning strips respectively. This setting can not only save material, but also realize good contact between the battery pole and the bottom positioning bar.

The working principle of the utility model is as follows: firstly, an end plate 81 of the battery module 8 is placed on the side of the fixed end block 41, and is positioned through the fixed end block 41; Next, put it on the insulating base 1; then place the side plate 82, and use the stopper 5 to locate the position in the vertical direction between the end plate 81 and the side plate 82; then the first driving cylinder 31 on both sides of the base 1 moves forward simultaneously , push the first positioning block 3 to press the side plate 82; then the second drive cylinder 421 moves forward, pushes the movable end block 42 to press the other end plate 81, the second drive cylinder 421 detects the moving distance to ensure the total length of the module, and the pressure sensor 422 Detect the pressing force to ensure that the pressure is appropriate; the rotating motor 6 rotates, and the upper pressing block 2 is moved downward through the movable rod 61 until the spring pressure head 21 contacts the upper surface of the inverted battery, and the upper and lower surfaces of the battery module 8 are balanced; The stirring head 7 passes through the welding groove 32, and realizes the solid phase welding of the end plate 81 and the side plate 82 by using frictional heat; finally, the stirring head 7 exits, and the rotating motor 6 and the cylinder are simultaneously released to realize a welding cycle.

It should be noted that the above-mentioned positioning and clamping process can be operated manually, or can be fully automated by manipulators.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also change and modify the above embodiment. Therefore, the utility model is not limited to the above specific implementation manners, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the utility model shall belong to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (10)

1. A friction stir welding welding tool, characterized in that: it includes a base for placing the battery module, an upper pressing block corresponding to the base, first positioning blocks arranged on both sides of the base, and a set The second positioning block at both ends of the base, the first positioning block and the second positioning block are vertically arranged, the first positioning block is equipped with a first driving cylinder, and the first positioning block is provided with welding groove. 2. A friction stir welding welding tool according to claim 1, characterized in that: it also includes limit blocks arranged on both sides of the base, and the limit blocks are used to position the end plate and the end plate of the battery module. side panels. 3. A friction stir welding welding tool according to claim 2, characterized in that: the number of the first positioning blocks is set to at least four, and the welding seam formed by the end plate and the side plate is consistent with the Corresponds to the above welding groove. 4. The friction stir welding welding tool according to claim 3, characterized in that: the width of the welding groove is greater than the width of the stirring head, and the height of the welding groove is greater than the height of the welding seam. 5. A friction stir welding welding tool according to claim 1, characterized in that: the shape of the first positioning block is "L", and the first driving cylinder is installed on the first positioning block bottom. 6 . The friction stir welding tool according to claim 1 , wherein the upper pressing block is equipped with spring pressing heads, and the spring pressing heads are evenly distributed on the surface of the upper pressing block. 7 . 7. The friction stir welding tool according to claim 6, wherein the upper pressing block is connected to the rotating motor through a movable rod. 8. A friction stir welding welding tool according to claim 1, characterized in that: the second positioning block includes a fixed end block and a movable end block, and the movable end block is equipped with a pressure sensor and a second driving cylinder . 9 . The friction stir welding welding tool according to claim 1 , wherein the base is configured as a positioning plate or a positioning bar, and the positioning plate or positioning bar is made of insulating material. 10 . 10 . The friction stir welding welding tool according to claim 9 , wherein the number of the positioning bars is set to two, and the distance between the two positioning bars is equal to the distance between the positive and negative poles of the battery. 11 .