CN220659652U

CN220659652U - Battery module welding device

Info

Publication number: CN220659652U
Application number: CN202322342247.9U
Authority: CN
Inventors: 黄中胜; 刘鹏; 陈功
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-08-29
Filing date: 2023-08-29
Publication date: 2024-03-26
Anticipated expiration: 2033-08-29

Abstract

The application relates to a battery module welding device, which comprises a base, a displacement platform, a driving mechanism, a welding positioning tool and a bearing platform for placing a battery module; the base is provided with a first sliding rail and a second sliding rail which are oppositely arranged, the displacement platform is arranged on the first sliding rail and the second sliding rail, the bearing platform is fixed on the base, and the welding positioning tool is detachably arranged on the displacement platform and is used for pressing a row of battery cell groups to be welded in the battery module on the bearing platform; the driving mechanism comprises a screw rod, a connecting block and fixing seats fixed on two opposite sides of the base; the both ends of lead screw rotate with two fixing bases respectively and are connected, are equipped with the screw hole on the connecting block, on the connecting block was located the lead screw through screw hole thread bush, connecting block and displacement platform fixed connection, through rotating the lead screw with drive displacement platform along the slide rail slip, through above-mentioned mode, the welding set of this application can compatible multiple battery module's that has different electric core intervals welding, reduces anchor clamps cost.

Description

Battery module welding device

Technical Field

The application relates to the technical field of electric energy, in particular to a battery module welding tool.

Background

After a plurality of electric cores are assembled into a battery module, welding of electric core pole columns and bus bars is generally required, the electric cores and the bus bars are clamped by using a welding fixture during welding, so that two pieces to be welded, namely the pole columns and the bus bars, are clamped, and then the pole columns and the bus bars which are clung together are welded through welding equipment. For battery modules with different structures, the intervals between the battery cells, such as the intervals between the adjacent two rows of battery cells, are different, so that different welding fixtures are often required to be matched according to the structures of different battery modules, however, a new fixture tool often needs a longer manufacturing period, and the fixture cost is greatly increased.

Disclosure of Invention

Accordingly, it is necessary to provide a welding device for battery modules, which is capable of being compatible with welding of a plurality of battery modules with different cell pitches, and reducing the cost of a fixture.

In a first aspect, the application provides a battery module welding device, which comprises a base, a displacement platform, a driving mechanism, a welding positioning tool and a bearing platform for placing a battery module;

the base is provided with a first sliding rail and a second sliding rail which are oppositely arranged, the displacement platform comprises two supporting components and a synchronous plate connected with the two supporting components, the two supporting components are respectively arranged on the first sliding rail and the second sliding rail in a sliding manner, the bearing platform is fixed on the base and positioned between the two supporting components, and two ends of the welding positioning tool are respectively detachably arranged on the two supporting components and used for pressing a row of battery cell groups to be welded in the battery module on the bearing platform;

the driving mechanism comprises a screw rod, a connecting block and fixing seats fixed on two opposite sides of the base; the two ends of the screw rod are respectively connected with the two fixing seats in a rotating mode, threaded holes are formed in the connecting blocks, the connecting blocks are sleeved on the screw rod through the threaded holes in a threaded mode, the connecting blocks are fixedly connected with the synchronous plates, and the screw rod is rotated to drive the two supporting components to synchronously slide along the first sliding rail and the second sliding rail respectively.

Further, the supporting component comprises a sliding block, a supporting seat, a locking piece and a connecting plate, wherein the sliding block is arranged on the first sliding rail or the second sliding rail in a sliding manner, the supporting seat is arranged on the sliding block, and the connecting plate is arranged on the supporting seat; the connecting plate is detachably connected with the end part of the welding positioning tool;

one end of the synchronous plate is fixed between the sliding block and the supporting seat in one supporting component, and the other end of the synchronous plate is fixed between the sliding block and the supporting seat in the other supporting component.

Further, the supporting component further comprises a locking piece, a first through hole is formed in the connecting plate, a second through hole is formed in the end portion of the welding positioning tool, and the locking piece is arranged in the first through hole and the second through hole in a penetrating mode so that the welding positioning tool is fixed with the connecting plate;

at least one of the first through hole and the second through hole is a strip-shaped hole, and the position adjustment of the welding positioning tool is realized by adjusting the locking piece at different positions of the strip-shaped hole.

Further, the fixed orifices have been seted up on the supporting seat, the retaining member includes fastening bolt and nut, the one end of fastening bolt runs through in proper order behind second through-hole, the first through-hole inserts and locates in the fixed orifices, the other end of fastening bolt is located to the nut thread bush.

Further, the support assembly further comprises a first elastic mechanism, and the connecting plate is mounted on the support seat through the first elastic mechanism;

the connecting plate is provided with a first connecting hole, the first elastic mechanism comprises a first spring and a first connecting column, one end of the first connecting column is connected with the supporting seat, the other end of the first connecting column is movably inserted into the first connecting hole, the first spring is sleeved on the first connecting column, and two ends of the first spring are respectively connected with the connecting plate and the supporting seat.

Further, the welding positioning tool comprises a first compression block, a second compression block, a mounting plate, a fixing plate, a plurality of positioning blocks and a plurality of second elastic mechanisms; the positioning blocks are in one-to-one correspondence with the battery cells in the battery cell group;

one end of the first compression block is fixed on one end of the mounting plate, the other end of the first compression block is one end of the welding positioning tool, and the second through hole is formed; one end of the second compaction block is fixed on the other end of the mounting plate, the other end of the second compaction block is the other end of the welding positioning tool, and the second through hole is formed;

the fixing plate is fixed on the mounting plate, each positioning block is mounted on the fixing plate through at least one second elastic mechanism and used for positioning and compressing one battery cell in the battery cell group, a third through hole is formed in each positioning block, a fourth through hole corresponding to the third through hole is formed in the fixing plate, and the welding part of the battery cell is exposed through the third through hole and the fourth through hole.

Further, the second elastic mechanism comprises a second spring and a second connecting column, a second connecting hole is formed in the positioning block, one end of the second connecting column is fixed on the fixed plate, the other end of the second connecting column is movably inserted into the second connecting hole, the second spring is sleeved on the second connecting column, and two ends of the second spring are respectively connected with the fixed plate and the positioning block;

the positioning block is further provided with a positioning column, the positioning column is provided with a fifth through hole, the positioning column is inserted into the third through hole, and the welding part of the battery cell is exposed through the fourth through hole and the fifth through hole.

Further, the base is provided with graduated scales at the edges close to the first sliding rail and the second sliding rail, and the displacement platform is provided with indicating needles pointing to the graduated scales.

Further, the bearing platform comprises a plurality of supporting column feet, a bearing plate, a limiting block and a clamping piece;

the support column foot is connected between the bearing plate and the base to support the bearing plate, the limiting blocks and the clamping pieces are respectively fixed on two opposite sides of the bearing plate, the clamping pieces comprise fixing blocks, adjusting bolts and clamping plates, the fixing blocks are fixed on the bearing plate, one ends of the adjusting bolts are fixedly connected with the clamping plates, the other ends of the adjusting bolts are in threaded connection with the fixing blocks, the battery modules are placed on the bearing plate between the limiting blocks and the clamping plates, the spacing between the clamping plates and the limiting blocks is adjusted through knob adjusting screws, and then the battery modules are clamped between the limiting blocks and the clamping plates.

Further, the synchronizing plate is located between the carrier plate and the base, and the driving mechanism is located between the synchronizing plate and the base.

The battery module welding device comprises a base, a displacement platform, a driving mechanism, a welding positioning tool and a bearing platform for placing a battery module; the base is provided with a first sliding rail and a second sliding rail which are oppositely arranged, the displacement platform comprises two supporting components and a synchronous plate connected with the two supporting components, the two supporting components are respectively arranged on the first sliding rail and the second sliding rail in a sliding manner, the bearing platform is fixed on the base and positioned between the two supporting components, and two ends of the welding positioning tool are respectively and detachably arranged on the two supporting components and used for pressing a row of battery cell groups to be welded in the battery module on the bearing platform; the driving mechanism comprises a screw rod, a connecting block and fixing seats fixed on two opposite sides of the base; the utility model discloses a welding jig is characterized by comprising a screw rod, a connecting block, a connecting plate, a driving mechanism, a welding fixture tool and a welding fixture tool, wherein the screw rod is arranged on the screw rod, the connecting block is provided with a threaded hole, the connecting block is sleeved with threads of the threaded hole and is fixedly connected with a synchronous plate, the screw rod is rotated to drive two supporting components to synchronously slide along a first sliding rail and a second sliding rail respectively, thereby, after the welding of a row of battery cell groups is completed, the supporting components can be driven to slide along the sliding rails through the driving mechanism, and then the welding fixture tool is driven to move to the next row of battery cell groups to be welded to carry out positioning and pressing, so that the welding device can weld the row of battery cell groups to be positioned and pressed, and the sliding distance of the supporting components can be determined according to the intervals of the battery cells of two adjacent rows.

Drawings

Fig. 1 is a schematic structural diagram of a welding device for a battery module provided in the present application;

fig. 2 is an exploded view of the battery module welding device provided by the present application;

FIG. 3 is an exploded schematic view of the support assembly provided herein;

FIG. 4 is a schematic structural diagram of a welding positioning tool provided by the present application;

fig. 5 is a schematic diagram of a cell arrangement of the battery module provided in the present application;

FIG. 6 is a schematic structural view of a clamping member provided in the present application;

fig. 7 is another schematic structural diagram of the welding positioning tool provided by the application.

Reference numerals in the embodiments of the present application are described below:

welding device: 100; and (2) base: 1, a step of; first slide rail: 111; the second slide rail: 112; a graduated scale: 12; and (3) a displacement platform: 2; and (3) a supporting assembly: 21, a step of; and (3) sliding blocks: 211; and (3) supporting seats: 212; locking piece: 213; fastening bolts: 2131; and (3) a nut: 2132; and (3) connecting a plate: 214; a synchronizing plate: 22; a first elastic mechanism: 23; a first spring: 231; first connecting column: 232; indication needle: 24, a step of detecting the position of the base; a driving mechanism: 3, a step of; and (3) a screw rod: 31; connecting blocks: 32; the fixing base is as follows: 33; welding positioning tool: 4. 6, preparing a base material; a first compaction block: 41; the second compaction block: 42; and (2) mounting plate: 43. And (3) fixing plates: 44; positioning blocks: 45; a second elastic mechanism: 46; and a second spring: 461; second connection post: 462; positioning column: 47; and (3) a bearing platform: 5, a step of; support column base: 51; the bearing plate comprises: 52; limiting block: 53; clamping piece: 54; and (3) fixing blocks: 541; adjusting bolt: 542; clamping plate: 543, respectively; buffer layer: 544; a first through hole: a1; and a second through hole: a2; fixing holes: a3; a first connecting hole: a4; third through hole: a5; a fourth through hole; a6; a second connection hole: a7; fifth through hole: a8.

Detailed Description

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

The battery module welding device can be used for compressing and fixing the battery core in the battery module so as to facilitate welding by welding equipment, wherein the welding of the battery module can be the welding of the battery core and the pole, the welding of the pole and the bus bar, and the like. By taking welding of the electrode posts and the bus bars as an example, the battery module comprises battery cells (the battery cells are the battery cells welded with the electrode posts) arranged in an array and the bus bars located on the battery cell electrode posts, one row of battery cells and the bus bars located on the battery cells form one row of battery cell groups, and the one row of battery cell groups can be positioned and pressed through the welding device, so that the bus bars are clung to the electrode posts of the battery cells, and welding equipment is convenient to weld.

Referring to fig. 1 to 4, a battery module welding device 100 provided in the embodiments of the present application includes a base 1, a displacement platform 2, a driving mechanism 3, a welding positioning tool 4, and a carrying platform 5 for placing a battery module.

The base 1 is provided with a first sliding rail 111 and a second sliding rail 112 which are oppositely arranged, the displacement platform 2 comprises two supporting components 21 and a synchronous plate 22 connected with the two supporting components 21, the two supporting components 21 are respectively arranged on the first sliding rail 111 and the second sliding rail 112 in a sliding manner, the bearing platform 5 is fixed on the base 1 and is positioned between the two supporting components 21, two ends of the welding positioning tool 4 are respectively detachably arranged on the two supporting components 21 and are used for pressing a row of battery cell groups to be welded in the battery module on the bearing platform 5.

The driving mechanism 3 comprises a screw rod 31, a connecting block 32 and fixing seats 33 fixed on two opposite sides of the base 1; two ends of the screw rod 31 are respectively connected with the two fixing seats 33 in a rotating way, for example, a rotating hole can be formed in the fixing seat 33, and two ends of the screw rod 31 are respectively inserted into the rotating holes of the two fixing seats in a rotatable way. The connecting block 32 is provided with a threaded hole, the connecting block 32 is sleeved on the screw rod 31 through the threaded hole, and the connecting block 32 is fixedly connected with the synchronous plate 22, for example, by means of screwing or riveting. By rotating the screw rod 31 to drive the two support assemblies 21 to synchronously slide along the corresponding first slide rail 111 and the second slide rail 112, respectively, more specifically, the screw rod 31 is in threaded connection with the connecting block 32, so that the connecting block 32 can move back and forth along the screw rod 31 when the screw rod 31 is rotated clockwise or counterclockwise, thereby driving the synchronous plate 22 to move, and further enabling the support assemblies 21 connected with the synchronous plate 22 to synchronously slide along the corresponding slide rails.

Therefore, through the battery module welding device 100 of the application, when a row of battery cell groups of the battery module are required to be welded, the row of battery cell groups are pressed on the bearing platform 5 through the welding positioning tool 4, so that the battery cell poles in the battery cell groups are clung to the bus bars, and then the welding equipment can weld the poles in the battery cell groups and the bus bars. After the welding of a row of electric core group is accomplished, can be through rotating lead screw 31 drive two supporting component 21 and slide along first slide rail 111 and second slide rail 112 respectively, and then drive welding position frock 4 and remove to the electric core group of waiting to weld next row and fix a position and compress tightly, and the gliding distance of supporting component 21 can be according to the electric core interval of two rows of adjacent, consequently, this application can be compatible the welding of the battery module that has different electric core intervals through single row welded mode to can reduce the preparation of welding jig frock, reduce welding jig frock cost.

In the embodiment shown in fig. 1, the number of the first sliding rails 111 and the number of the second sliding rails 112 are 1, in other embodiments, the number of the first sliding rails 111 may be multiple, the number of the first sliding rails 111 may be parallel to one side of the base 1, the number of the second sliding rails 112 may be multiple, and the number of the second sliding rails 112 may be parallel to the other side of the base 1.

With continued reference to fig. 1 and 2, in the embodiment of the present application, the support assembly 21 includes a slider 211, a support base 212, a locking member 213, and a connecting plate 214, where the slider 211 is slidably disposed on the first sliding rail 111 or the second sliding rail 112, the support base 212 is mounted on the slider 211, and the connecting plate 214 is mounted on the support base 212; the connecting plate 214 is detachably connected with the welding positioning tool 4, for example, the connecting plate can be in a threaded connection or a clamping connection. Further, the connecting plate 214 is provided with a first through hole a1, the end part of the welding positioning tool 4 is provided with a second through hole a2, and the locking piece 213 is arranged in the first through hole a1 and the second through hole a2 in a penetrating way so as to fix the welding positioning tool 4 with the connecting plate 214. One end of the synchronization plate 22 is fixed between the slider 211 and the support base 212 in one support assembly 21, the other end of the synchronization plate 22 is fixed between the slider 211 and the support base 212 in the other support assembly 21, that is, the end of the synchronization plate 22 is fixed on the slider 211, and the support base 212 is fixed on the synchronization plate 22.

At least one of the first through hole a1 and the second through hole a2 is a strip-shaped hole, and the position adjustment of the welding positioning tool 4 is realized at different positions of the strip-shaped hole by adjusting the locking piece 213. As shown in the figure, the second through hole a2 is an elongated hole. The support base 212 is provided with a fixing hole a3, the locking piece 213 comprises a fastening bolt 2131 and a nut 2132, one end of the fastening bolt 2131 sequentially penetrates through the second through hole a2 and the first through hole a1 and is inserted into the fixing hole a3, and the nut 2132 is sleeved on the other end of the fastening bolt 2131 in a threaded manner. It is understood that the diameter of the nut 2132 is larger than the width of the second through hole a2. By constantly turning the nut 2132 in the direction of the welding fixture 4, the welding fixture 4 and the connection plate 214 can be fastened together, and rotating the nut 2132 in the opposite direction can release the welding fixture 4 and the connection plate 214 to unlock the welding fixture 4.

Alternatively, the fixing hole a3 may be a screw hole, and the fastening bolt 2131 is screwed to the fixing hole a3. The fixing hole a3 may be a non-through hole or a through hole, where when the fixing hole a3 is a through hole, a cover may be disposed on a side of the support base 212 opposite to the connecting plate 214, so as to cover an opening of one end of the fixing hole a3, thereby defining the fastening bolt 2131 in the fixing hole a3 and preventing the fastening bolt 2131 from extending out of the fixing hole a3.

Further, the support assembly 21 further includes a first elastic mechanism 23, and the connection plate 214 is mounted on the support base 212 through the first elastic mechanism 23. Specifically, the connecting plate 214 is provided with a first connecting hole a4, the first elastic mechanism 23 includes a first spring 231 and a first connecting column 232, one end of the first connecting column 232 is connected with the supporting seat 212, the other end of the first connecting column 232 is movably inserted into the first connecting hole a4, the first spring 231 is sleeved on the first connecting column 232, two ends of the first spring 231 are respectively connected with the connecting plate 214 and the supporting seat 212, two ends of the first spring 231 can be fixedly connected with the connecting plate 214 and the supporting seat 212, or can be in contact connection, and a welding mode or the like can be adopted for the fixed connection.

Therefore, through the above manner, the connecting plate 214 can move relative to the supporting seat 212, and then the distance between the welding positioning tool 4 and the bearing platform 5 can be finely adjusted so as to adapt to battery modules with different heights, when the nut 2131 is continuously turned downwards, the welding positioning tool 4 can be continuously close to the connecting plate 214, even the connecting plate 214 is continuously pressed downwards, so that the first spring 231 is compressed, the compressed degree of the first spring 231 can be adjusted by changing the stroke of the nut 2131, and then the distance between the welding positioning tool 4 and the bearing platform 5 can be adjusted, the greater the compressed degree of the first spring 231 is, the smaller the distance between the welding positioning tool 4 and the bearing platform 5 is, and otherwise the greater is. In addition, when the nut 2131 is turned upward and the welding positioning tool 4 is not pressed, the welding positioning tool 4 is sprung up by the elastic force of the first spring 231, so that the compression of the battery cells can be released.

Optionally, the connection plate 214 is connected to the support base 212 through two first elastic mechanisms 23.

In this embodiment, as shown in fig. 4, the welding positioning tool 4 includes a first compression block 41, a second compression block 42, a mounting plate 43, a fixing plate 44, a plurality of positioning blocks 45, and a plurality of second elastic mechanisms 46, wherein a partially exploded structure, that is, an exploded structure of one positioning block 45 and a second elastic mechanism 56 is illustrated in fig. 4.

The positioning blocks 45 are in one-to-one correspondence with the battery cells in the battery cell group. One end of the first compression block 41 is fixed on one end of the mounting plate 43, the other end of the first compression block 41 is one end of the welding positioning tool 4, and a second through hole a2 is formed; one end of the second compression block 42 is fixed on the other end of the mounting plate 43, the other end of the second compression block 43 is the other end of the welding positioning tool 4, and a second through hole a2 is formed. The fixing plate 44 is fixed on the mounting plate 43, each positioning block 45 is mounted on the fixing plate 44 through at least one second elastic mechanism 46, each positioning block 45 is used for positioning and compressing one cell in a row of cell groups, a third through hole a5 is formed in each positioning block 45, a fourth through hole a6 is formed in the fixing plate 44, and the welding part of the cell is exposed through the third through hole a5 and the fourth through hole a 6.

Further, the second elastic mechanism 46 includes a second spring 461 and a second connecting post 462, the positioning block 45 is provided with a second connecting hole a7, one end of the second connecting post 462 is fixed on the fixing plate 44, the other end of the second connecting post 462 is movably inserted into the second connecting hole a7, the second spring 461 is sleeved on the second connecting post 462, and two ends of the second spring 461 are respectively connected with the fixing plate 44 and the positioning block 45, for example, the two ends of the second spring 461 can be fixedly connected, and the fixed connection mode can be welding. The positioning block 45 is also provided with a positioning column 47, the positioning column 47 is provided with a fifth through hole a8, the positioning column 47 is inserted into the third through hole a5, and the welding part of the battery core is exposed through the fourth through hole a6 and the fifth through hole a8. Through the elastic action of the second elastic mechanism 46, the height difference of a plurality of battery cells in a row of battery cell groups can be absorbed, so that the pole of each battery cell and the bus bar on the pole can be pressed by the corresponding positioning block 45.

In addition, through the effect of second through-hole a2, can follow the length direction of second through-hole a2 and remove welding location frock 4, and then adjust the position of locating piece 45 to adapt to the electric core of the different range modes of electric core group of different rows. For example, as shown in fig. 5, a cell arrangement structure of a battery module is illustrated, where the battery module has 4 rows of cell groups, the number of cells in each row of cell groups is 3, and for two adjacent rows of cell groups, the arrangement positions of the first cells are different, and the adjacent two rows of cell groups generally form a prismatic array, so when the welding positioning tool 4 moves from one row of cell groups to another, for example, from the cell group E to the cell group F, the welding positioning tool 4 needs to be moved rightward, so that each positioning block 45 can correspondingly press one cell, and since the second through hole a2 is an elongated hole, the second through hole a2 still corresponds to the first through hole a1 in position after the welding positioning tool 4 is moved, and the locking member 231 can be inserted into the second through hole a2 and the first through hole a1 and then lock the welding positioning tool 4 with the connecting plate 214.

It can be understood that the spacing between the positioning blocks and the number of the positioning blocks in the welding positioning tool 4 can be determined according to the cell spacing and the number of the cells in a row of cell groups.

Wherein, welding position frock 4 of above-mentioned embodiment is anodal welding position frock, and welding position frock 4 is used for the location of electric core when carrying out welding operation at the anodal end of electric core to compress tightly, as shown in fig. 7, welding set 100 of this application can also include the welding position frock 6 that is used for the location of electric core to compress tightly when carrying out welding operation to the negative pole end of electric core, and this welding position frock 6 is negative pole welding position frock. The main difference between the welding positioning tool 4 and the welding positioning tool 6 is that the shape of the positioning column and the shape and the size of the fifth through hole on the positioning column are different. For example, the positioning column of the welding positioning tool 4 is substantially cylindrical, the fifth through hole is circular, while the positioning column of the welding positioning tool 6 is substantially arc-shaped, and the fifth through hole is also arc-shaped. The shapes and sizes of the positioning column and the fifth through hole can be determined according to the shape and the size of the welding part, and the welding part is not limited.

Optionally, in the embodiment of the present application, the base 1 is provided with the scale 12 near the edges of the first sliding rail 111 and the second sliding rail 112, and the displacement platform 2 is provided with the indicator 24 pointing to the scale 12, where the indicator 24 may be fixed on the synchronization board 22, or may also be fixed on the supporting base 212 or the sliding block 211, for example. Therefore, through the action of the graduated scale 12, an operator can conveniently check the moving distance of the displacement platform 2 so as to more accurately control the movement of the displacement platform 2, and the positioning block 45 on the welding positioning tool 4 can be more accurately positioned to the battery cell.

As shown in fig. 1, 2 and 6, the carrying platform 5 of the present application includes a plurality of support posts 51, a carrying plate 52, a stopper 53 and a clamping member 54.

The supporting columns 51 have 4 supporting columns, the 4 supporting columns are located at four corners of the bearing plate 52 and are connected between the bearing plate 52 and the base 11 to support the bearing plate 52, the limiting block 53 and the clamping piece 54 are respectively fixed on two opposite sides of the bearing plate 52, the clamping piece 54 comprises fixing blocks 541, adjusting bolts 542 and clamping plates 543, the number of the adjusting bolts 542 is two, the fixing blocks 541 are fixed on the bearing plate 52, one ends of the adjusting bolts 542 are fixedly connected with the clamping plates 543, the other ends of the adjusting bolts are in threaded connection with the fixing blocks 541, the battery module is placed on the bearing plate 52 between the limiting block 53 and the clamping plates 543, the spacing between the clamping plates 543 and the limiting block 53 is adjusted through knob adjusting screws 542, and then the battery module is clamped between the limiting blocks 53 and the clamping plates 543. Therefore, by the action of the clamping members 54, the carrier plate 52 can be allowed to place battery modules of different sizes. In order to reduce the pressing force on the battery module, a buffer layer 544 may be further disposed at the front end of the clamping plate 543, and the buffer layer 544 may be a sponge or a soft rubber block.

As shown in fig. 1, the synchronization plate 22 is located between the carrier plate 52 and the base 1, and the driving mechanism 3 is located between the synchronization plate 22 and the base 1.

The working principle of the welding device 100 of the present application will be further described below.

Firstly, a plurality of rows of electric cores and bus bars are assembled into a battery module, the bus bars are arranged on the poles of the electric cores, and a row of electric cores and the bus bars above the poles of the electric cores form a row of electric core groups. The battery module is placed on the carrier plate 52, and then the knob adjusting bolt 542 pushes the clamping plate 543 to move toward the battery module, and the clamping plate 543 compresses the battery module between the clamping plate 543 and the limiting block 53 along with the knob of the adjusting bolt 542. After that, the welding fixture 4 is mounted on the displacement platform 2 through the locking member 213, and at this time, the nut 2132 of the locking member 213 is in an unlocked state, that is, the nut 2132 is not pressed against the pressing block of the welding fixture 4, and the positioning block 45 is not pressed against the cell. Then, the screw rod 31 is rotated to drive the displacement platform 2 to slide along the first slide rail 111 and the second slide rail 112, so that the welding positioning tool 4 is moved to the position above the row of battery cell groups to be welded, wherein the moving distance can be checked by observing the position of the indicating needle 24 on the graduated scale 12 in the moving process. After the welding positioning tool 4 moves to the position above the to-be-welded battery cell group, the welding positioning tool 4 can be moved along the length direction of the second through hole a2, so that the position of the welding positioning tool 4 in the direction can be adjusted, each positioning block 45 corresponds to the battery cells of the battery cell group one by one, then the nuts 2132 are screwed down to compress the corresponding compression blocks until the positioning columns 47 on the positioning blocks 45 compress the corresponding battery cell poles and the buses on the corresponding battery cell poles, and the welding equipment can weld the closely attached battery poles and buses. After the welding of a row of cell groups is completed, the nut 2132 is turned upwards to unlock the welding positioning tool 4, so that the welding positioning tool 4 does not compress the cells and the busbar any more, then the screw rod 31 is turned to move the welding positioning tool 4 to the position above the next row of cell groups, and after the positioning blocks 45 on the welding positioning tool 4 are in one-to-one correspondence with the cells of the row of cell groups, the nut 2132 is screwed down, so that the positioning blocks 45 of the welding positioning tool 4 compress the cells and the busbar, then the welding of the pole and the busbar can be performed, and so on until the welding of each row of cell groups is completed.

After the welding of the positive electrode post and the busbar is completed, the locking piece can be pulled out, and then the welding positioning tool 4 is replaced by the welding positioning tool 6 so as to weld the negative electrode post and the busbar, and the specific method can be referred to as the above, and the details are not repeated here.

Therefore, the welding device 100 of the application, through making displacement platform 2 slide along first slide rail 111, second slide rail 112, thereby can make welding position frock 4 remove to next row of electric core group from one row of electric core group, realize single row welding, consequently the welding device 100 of the application can be compatible the welding of the battery module that has different electric core intervals, in addition, through setting up rectangular second through hole a2, make welding position frock 4 can follow the length direction of second through hole a2 and remove, with the position of the locating piece on the welding position frock 4 is located in the regulation, thereby can adapt to the electric core of the different range modes of electric core group of different rows, further improve welding device 100's compatibility.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims

1. The welding device for the battery module is characterized by comprising a base, a displacement platform, a driving mechanism, a welding positioning tool and a bearing platform for placing the battery module;

2. The welding device for the battery module according to claim 1, wherein the supporting assembly comprises a slider slidably disposed on the first slide rail or the second slide rail, a supporting seat mounted on the slider, and a connection plate mounted on the supporting seat; the connecting plate is detachably connected with the end part of the welding positioning tool;

3. The welding device for the battery module according to claim 2, wherein the supporting assembly further comprises a locking member, a first through hole is formed in the connecting plate, a second through hole is formed in the end portion of the welding positioning tool, and the locking member is arranged in the first through hole and the second through hole in a penetrating manner so as to fix the welding positioning tool with the connecting plate;

4. The welding device for the battery module according to claim 3, wherein the fixing hole is formed in the supporting seat, the locking member comprises a fastening bolt and a nut, one end of the fastening bolt sequentially penetrates through the second through hole and the first through hole and then is inserted into the fixing hole, and the nut is sleeved on the other end of the fastening bolt in a threaded manner.

5. The welding device for battery modules according to claim 2, wherein the support assembly further comprises a first elastic mechanism by which the connection plate is mounted on the support base;

6. The welding device for the battery module according to claim 3, wherein the welding positioning fixture comprises a first compression block, a second compression block, a mounting plate, a fixing plate, a plurality of positioning blocks and a plurality of second elastic mechanisms; the positioning blocks are in one-to-one correspondence with the battery cells in the battery cell group;

7. The welding device for the battery module according to claim 6, wherein the second elastic mechanism comprises a second spring and a second connecting column, a second connecting hole is formed in the positioning block, one end of the second connecting column is fixed on the fixed plate, the other end of the second connecting column is movably inserted into the second connecting hole, the second spring is sleeved on the second connecting column, and two ends of the second spring are respectively connected with the fixed plate and the positioning block;

8. The welding device for the battery module according to claim 1, wherein graduated scales are arranged on the base at edges close to the first sliding rail and the second sliding rail, and indicating needles pointing to the graduated scales are arranged on the displacement platform.

9. The battery module welding device according to claim 1, wherein the carrying platform comprises a plurality of supporting studs, carrying plates, limiting blocks and clamping pieces;

10. The battery module welding device according to claim 9, wherein the synchronization plate is located between the carrier plate and the base, and the driving mechanism is located between the synchronization plate and the base.