CN219818463U - Battery module welding fixture - Google Patents

Abstract

The utility model relates to a battery module welding tool which comprises a supporting component, an adjusting component and a pressure head component, wherein the adjusting component comprises a first adjusting unit and a second adjusting unit which are connected with the supporting component, the first adjusting unit is connected with the second adjusting unit, the first adjusting unit is arranged in an extending mode along a first direction, and the second adjusting unit is arranged in an extending mode along a second direction; the pressure head assembly comprises a first moving part and a pressure head connected with the first moving part, wherein the pressure head is provided with a through hole used for allowing laser to pass through. Through adjusting two adjacent pressure heads on the first adjusting unit, the battery cell module with different thicknesses can be adapted; through adjusting the pressure head on the second adjusting unit, the electric core polar column of different intervals can be adapted, and the universality is strong.

Description

Battery module welding fixture

Technical Field

The utility model relates to the technical field of new energy, in particular to a welding tool for a battery module.

Background

With the development of new energy markets, the demand for batteries is expanding. The battery is manufactured by assembling the battery cells into a module and then integrating a plurality of modules with a Battery Management System (BMS) and a thermal management system to form a battery pack. In the process of assembling the battery cells into the battery module, the components such as the bus bar and the like are required to be connected with the electrode poles of the battery cells in a welding mode, and a plurality of battery cells are connected in series or in parallel to form the anode and the cathode of the battery module.

In the related art, a certain pressure is applied to the busbar and the battery core pole by a pressure head in the welding tool, so that the busbar and the battery core pole are tightly pressed. The battery welding generally adopts electric welding or laser welding, and when using laser welding, the welding frock that needs to correspond to the electric core of different model specification sizes is pressed together the busbar on the electrode post to this welding effect of assurance.

However, the welding fixture can only weld battery modules of the same type or the same structure, cannot adapt to battery modules of various sizes, and therefore each different battery module needs to be independently provided with one set of welding fixture for welding, so that the production cost is greatly increased, and when the welding fixture is used, different welding fixtures need to be replaced, and the operation is complex. Therefore, how to improve the welding versatility of the welding fixture is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

Based on this, it is necessary to provide a battery module welding fixture for the problem that the production cost increases due to low versatility of the battery module welding fixture.

The utility model provides a battery module welding tool which comprises a supporting component, an adjusting component and a pressure head component, wherein the adjusting component comprises a first adjusting unit and a second adjusting unit fixedly connected with the first adjusting unit, the first adjusting unit and the second adjusting unit are both connected with the supporting component, the first adjusting unit is arranged in an extending mode along a first direction, and the second adjusting unit is arranged in an extending mode along a second direction; the pressure head subassembly is provided with two sets of, and every pressure head subassembly of group includes first moving part and the pressure head of being connected with first moving part, and two sets of first moving part are connected with first adjusting unit, second adjusting unit respectively, and a set of moving part can follow the first direction and remove, and another set of first moving part can follow the second direction and remove, and the pressure head is provided with the through-hole, and the through-hole is used for supplying laser to pass.

In one embodiment, the adjusting assembly further comprises a third adjusting unit extending along the first direction, the third adjusting unit being connected between the second adjusting unit and the first moving member such that the first moving member is movable along the first direction and the second direction.

In one embodiment, the third adjusting unit is provided with a second displacement member, by means of which the third adjusting unit is movably connected to the second adjusting unit.

In one embodiment, one of the first adjusting unit, the second adjusting unit and the third adjusting unit is a target adjusting unit, the target adjusting unit comprises an adjusting plate, the adjusting plate is provided with an adjusting hole and an operating hole, the adjusting hole is arranged at intervals with the operating hole, the adjusting hole is connected with the first moving piece, and orthographic projection of the operating hole and the through hole on a plane where the through hole is located has an overlapping area.

In one embodiment, the ram assembly further comprises a first mounting member, a second mounting member and a connecting member, the first mounting member being connected to the second mounting member by means of the connecting member, the first mounting member being adapted to mount the ram, the connecting member being adapted to make the first mounting member movable relative to the second mounting member, the second mounting member being connected to the moving part, the second mounting member being provided with a channel in which at least part of the ram is movable.

In one embodiment, the connector includes a slide bar portion connected to the first mounting member and a threaded portion connected to the slide bar portion, the threaded portion being connected to the second mounting member.

In one embodiment, the pressing head assembly further comprises an elastic member, the elastic member is arranged between the first mounting member and the second mounting member, the elastic member is sleeved on the connecting member, and the elastic member is used for releasing elastic force to press the pressing head to the object to be welded.

In one embodiment, the welding fixture further comprises a base and a positioning piece, wherein the base is connected with the supporting component, the positioning piece is connected with the base, and the positioning piece can move relative to the base.

In one embodiment, the welding fixture further comprises a fixture and a fastener, the fixture is connected with the base, the fastener is connected with the base, and the fastener is movable relative to the base toward the fixture.

In one embodiment, the adjustment assembly is movably connected to the support assembly, the support assembly being provided with a locking member which is movable in the axial direction of the support assembly, the locking member being adapted to lock the adjustment assembly.

The battery module welding tool provided by the utility model can adjust the position of the pressure head according to different battery cell sizes: the first group of pressure heads can move in the first adjusting unit along the first direction, and the adjacent two pressure heads on the first adjusting unit are adjusted to adapt to the battery cell modules with different thicknesses; the second group of pressure heads can move in the second adjusting unit along the second direction, and through adjusting the pressure heads on the second adjusting unit, the electric core pole columns with different distances can be adapted. The welding tool is simple and convenient to operate, can be used for welding only by adjusting the pressure head to correspond to the position of the battery cell pole, can meet the welding requirements of different battery cell sizes, and greatly reduces the production cost.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a welding tool according to an embodiment of the utility model.

Fig. 2 is a schematic structural diagram of a first adjusting unit and a second adjusting unit according to an embodiment of the utility model.

Fig. 3 is a schematic structural diagram of a third adjusting unit according to an embodiment of the utility model.

Fig. 4 is a schematic structural view of a locking member according to an embodiment of the utility model.

Fig. 5 is a schematic structural diagram of a press head assembly according to an embodiment of the utility model.

Fig. 6 is a schematic structural diagram of a connector according to an embodiment of the utility model.

Fig. 7 is a schematic structural view of a positioning plate, a fixing plate, a fastening plate and a moving assembly according to an embodiment of the utility model.

The reference numerals are as follows:

the base 10, the support assembly 20, the guide post 21, the locking piece 22, the adjusting assembly 30, the first adjusting unit 31, the pressing plate 311, the adjusting hole 312, the operation hole 313, the second adjusting unit 32, the third adjusting unit 33, the second moving piece 34, the ram assembly 40, the ram 41, the first mounting piece 42, the second mounting piece 43, the connecting piece 44, the slide bar portion 441, the screw portion 442, the first moving piece 45, the moving portion 451, the elastic piece 46, the positioning piece 50, the first plate portion 51, the bar hole 511, the second plate portion 52, the fixing piece 53, the fixing piece 61, the fastener 62, the moving assembly 70, the hand wheel 71, the screw support 72, the screw 73, the screw transmission seat 74, the slider 75, the slide rail 76, the pushing plate 77.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1, an embodiment of the utility model provides a welding tool for a battery module, and in the embodiment disclosed by the utility model, the welding tool for the battery module is applied to welding of a square-shell battery module or a soft-package battery core module with regular shape. The battery module welding fixture is arranged on the base 10, and the base 10 is used as a working platform for welding the battery module; the battery module welding tool comprises a supporting component 20, an adjusting component 30 and a pressure head component 40; the support assembly 20 is arranged on the base 10, and the support assembly 20 is connected with the adjusting assembly 30 and is used for supporting the adjusting assembly 30; the adjusting assembly 30 is connected with the pressing head assembly 40, the pressing head assembly 40 is mounted on the adjusting assembly 30, the pressing head assembly 40 can move to a preset position along a first direction (such as an X direction in fig. 1) or a second direction (such as a Y direction in fig. 1) relative to the adjusting assembly 30, the pressing head assembly 40 is used for pressing objects to be welded, and welding laser can penetrate through the pressing head assembly 40 to weld the objects to be welded. Specifically, the ram assembly 40 is used to press the buss bars onto the electrode posts of the cells, followed by laser welding of the buss bars and posts.

In other embodiments, the battery module welding tool can be also applied to welding of soft package battery modules or cylindrical battery modules with other shapes.

The support assembly 20 includes four guide posts 21. Four guide posts 21 are arranged at four corners of the base 10, and are connected with the adjusting component 30 for installing the adjusting component 30.

As shown in connection with fig. 1-3, the adjustment assembly 30 includes a first adjustment unit 31, a second adjustment unit 32, and a third adjustment unit 33. The first adjusting unit 31 is arranged in an extending mode along a first direction, the first adjusting unit 31 is connected with the guide pillar, the first adjusting unit 31 is connected with the first group of pressure head assemblies 40 in a sliding mode, and the first group of pressure head assemblies 40 can move on the first adjusting unit 31 along the first direction; the second adjusting unit 32 extends along the second direction, the second adjusting unit 32 is connected with the guide post, and the second adjusting unit 32 is fixedly connected with the first adjusting unit 31; the second adjusting unit 32 is slidably connected to the third adjusting unit 33, and the third adjusting unit 33 is movable in the second direction on the second adjusting unit 32; the second set of ram assemblies 40 is slidably connected to the third adjustment unit 33, the second set of ram assemblies 40 being movable in the first and second directions by means of the second and third adjustment units 32, 33. In the embodiment disclosed in the present utility model, the first adjusting unit 31, the second adjusting unit 32 and the third adjusting unit 33 have the same structure and are only different in size and arrangement direction, so only one adjusting unit 33 is described below as an example, and the other adjusting units having the same structure are not described in detail.

The first adjusting unit 31 includes an adjusting plate. The adjusting plates in the first adjusting unit 31 are fixedly connected with the adjusting plates in the second adjusting unit 32, and the two adjusting plates together form a pressing plate 311. The adjusting plate is provided with two adjusting holes 312 and an operating hole 313, the operating hole 313 is arranged between the two adjusting holes 312, and the adjusting holes 312 are used for allowing the pressure head assembly 40 to move, so that the pressure head assembly 40 can be adjusted according to the thicknesses of different electric cores and the positions of the poles, and then the bus bars are pressed to the poles at different positions; the operation hole 313 is used for installing a welding head or allowing laser of external welding equipment to pass through, and orthographic projection of the operation hole 313 and a through hole on the pressure head 41 on a plane where the through hole is located has an overlapping area, so that the laser can pass through the operation hole 313 and the through hole of the pressure head 41 to an object to be welded, and welding operation of the battery cell is realized. Preferably, the operation hole 313 corresponds to the position of the through hole on the ram 41.

Preferably, the pressing plate 311 is integrally formed.

Specifically, the adjustment hole 312 and the operation hole 313 of the first adjustment unit 31 extend in the first direction, the adjustment hole 312 and the operation hole 313 of the second adjustment unit 32 extend in the second direction, and the adjustment hole 312 and the operation hole 313 of the third adjustment unit 33 extend in the first direction. The first group ram assembly 40 is slidably coupled to the adjustment aperture 312 of the first adjustment unit 31 such that the first group ram assembly 40 is movable in a first direction; the second group ram assembly 40 is slidably coupled to the adjustment aperture 312 of the third adjustment unit 33 such that the second group ram assembly 40 is movable in the first direction; the third adjustment unit 31 is slidably connected to the second adjustment unit 32 such that the third adjustment unit 31 is movable in the second direction, enabling movement of the second set of ram assemblies 40 in the first and second directions.

The adjusting plate of the third adjusting unit 33 is provided with a second moving member 34. The adjusting plate in the third adjusting unit 33 is connected to the adjusting hole 312 in the second adjusting unit 32 via the second moving member 34, effecting movement of the third adjusting unit 33 in the second direction.

As shown in fig. 1 and 4, guide post holes are provided at four corners of the pressing plate 311. The pressing plate 311 is mounted on the guide post 21 through a guide post hole, and the pressing plate 311 can move up and down along the guide post 21. Specifically, the diameter of the guide post hole is larger than the diameter of the guide post 21. The guide post 21 is sleeved with a locking piece 22, and the locking piece 22 is used for locking the position of the pressing plate 311. The locking piece 22 is in a circular ring shape, the locking piece 22 is provided with an opening, the locking piece 22 is made of elastic metal sheets, the wall thickness of the locking piece 22 is inconsistent, and the upper part is thin and the lower part is thick. When the pressing plate 311 moves to the preset position, the locking piece 22 is moved into the gap between the guide post 21 and the guide post hole to lock the pressing plate 311. When the pressing plate 311 needs to move, the pressing plate 311 is lifted upwards to be separated from the locking piece 22, so that the height position of the pressing plate 311 can be adjusted, and the battery cell module with different heights can be adapted.

In other embodiments, movement and locking of the platen 311 may be accomplished using a screw drive. Specifically, at least one of the guide posts is a drive screw or a ball screw. The pressing plate 311 is moved up and down and locked by the movement of the screw. The screw may be driven manually or by a motor. Preferably, two screw rods are arranged and are diagonally distributed on the base 10, so that the moving stability of the pressing plate 311 is ensured.

As shown in connection with fig. 1, 5-6, the ram assembly 40 is provided with two sets. The first set of ram assemblies 40 are connected to the adjustment holes 312 in the first adjustment unit 31, the second set of ram assemblies 40 are connected to the adjustment holes 312 in the third adjustment unit 33, the two sets of ram assemblies 40 are identical in structure and size, only one ram assembly 40 is described below as an example, and the ram assemblies 40 with identical structures are not described in detail.

The ram assembly 40 includes a ram 41, a first mounting member 42, a second mounting member 43, a connecting member 44, a first moving member 45, and an elastic member 46. The ram 41 is used to press the buss bars onto the cell posts in different positions. The first mounting member 42 is plate/block/table-shaped, and the first mounting member 42 is for mounting the ram 41. The connecting piece 44 is used for connecting the first mounting piece 42 and the second mounting piece 43, the connecting piece 44 enables the first mounting piece 42 to move relative to the second mounting piece 43, and the first mounting piece 42 moves relative to the second mounting piece 43 so that the pressure head 41 can move up and down to adapt to the height positions of different battery cell poles. The second mounting member 43 is plate/block/table-like, and the second mounting member 43 is provided with a passage for accommodating up-and-down movement of the ram 41 and for passing the laser light therethrough. Specifically, the ram 41 extends through the first mount 42, one end of the ram 41 being located in the channel, and the end of the ram 41 being able to move in the channel when the first mount 42 moves relative to the second mount 43. The first moving part 45 is connected with the second mounting part 43, the first moving part 45 is connected with the adjusting hole 312, and the pressure head 41 can adaptively adjust the thicknesses of different electric cores and the positions of different electric core poles through the movement of the first moving part 45 in the adjusting hole 312, so that the electric core structures with different sizes can be matched. The elastic piece 46 is the spring, and the connecting piece 44 is located to the elastic piece 46 cover, and the elastic piece 46 is located between first mounting piece 42 and the second mounting piece 43, and the elastic piece 46 is in the state of compression all the time between first mounting piece 42 and second mounting piece 43, and the elastic piece 46 is used for releasing elasticity and acts on first mounting piece 42, and then makes pressure head 41 can tightly pressfitting the busbar to the electric core utmost point post on, guarantees the validity of welding operation.

The pressure head 41 is conical, and the pressure head 41 is provided with a through hole, and the through hole is used for enabling laser to pass through and weld the busbar and the battery cell pole.

The connector 44 includes a slide bar portion 441 and a threaded portion 442. The sliding rod portion 441 is connected to the screw portion 442, and the sliding rod portion 441 is preferably integrally formed with the screw portion 442. The slide bar portion 441 is slidably connected to the first mounting member 42, and the screw portion 442 is screw-connected to the second mounting member 43. The height of the ram 41 is adjusted by the screwing in and out of the connector 44, i.e. by the screwing in and out of the threaded portion 442 in the second mounting member 43, to match the different height of the cell poles. Further, the first mounting member 42 can move up and down with respect to the sliding rod portion 441, and the bus bar can be tightly pressed to the battery cell terminal by combining the elastic force of the elastic member 46, so that the welding efficiency and the welding stability are effectively improved.

The first mover 45 includes two moving portions 451. The two moving parts 451 are connected to the second mounting member 43, and the two moving parts 451 are connected to the two adjustment holes 312, respectively, so that the position of the ram 41 is adjusted by the movement of the moving parts 451 in the adjustment holes 312. The central axis of the pressure head 41 is located in the middle of the two moving parts 451, and the pressure head 41 corresponds to the position of the operation hole 313, so that welding laser can pass through the operation hole 313 and the through hole of the pressure head 41, and welding of the bus bar and the battery core pole is realized.

As shown in connection with fig. 1 and 7, the welding fixture further comprises a positioning member 50. The positioning member 50 is connected to the base 10, and the positioning member 50 is movable relative to the base 10. Specifically, the positioning member 50 includes a first plate portion 51 and a second plate portion 52, the first plate portion 51 and the second plate portion 52 being connected, the first plate portion 51 and the second plate portion 52 being perpendicular to each other. The first plate 51 is provided with a bar-shaped hole 511 extending in the second direction, the base 10 is provided with a fixing piece 53, the fixing piece 53 is slidably connected with the bar-shaped hole 511, and the position of the first plate 51 relative to the base 10 is achieved by adjusting the relative positions of the fixing piece 53 and the bar-shaped hole 511. The first plate portion 51 is moved in the first direction such that the second plate portion is adjacent to the battery module placed on the base 10 for positioning the battery module to a position aligned with the first regulating unit 31.

The welding fixture also includes a fixture 61, a fastener 62, and a moving assembly 70. The fixing member 61 and the fastening member 62 are plate/block-shaped, and the fixing member 61 and the fastening member 62 are disposed opposite to each other in the first direction, and the fixing member 61 and the fastening member 62 are used to clamp the stacked cell modules placed on the base 10. The fixing member 61 is fixed to the base 10 using a bolt, welding or riveting direction. The fastener 62 is connected with the base 10 through the moving assembly 70. The moving assembly 70 is used for moving the fastener 62 relative to the base 10 towards the fixing piece 61, and the moving assembly 70 and the fastener 62 apply moving pressure to the battery module so as to enable the battery cells to be closely fitted together.

The moving assembly 70 includes a hand wheel 71, a screw support 72, a screw 73, a screw drive 74, a slider 75, a slide rail 76, and a pusher plate 77. The screw 73 is connected to the base 10 via a screw support 72, and the hand wheel 71 is connected to the screw 73 for driving the screw 73 to rotate. The two slide rails 76 are provided, and are disposed on the base 10 and located on two sides of the screw 73, and the two slide blocks 75 are provided and slidably connected with the two slide rails 76. The screw drive seat 74 is in drive connection with the screw 73, the screw drive seat 74 is connected with the pushing plate 77, and the pushing plate 77 is connected with the fastener 62 and the sliding block 75. Rotating the hand wheel 71 rotates the screw 73, and the screw 73 rotates the screw drive seat 74 and the pushing plate 77 to move along the axis of the screw 73, and the pushing plate 77 moves to push the fastener 62 to move toward the fixing member 61, thereby pressing the battery module between the fixing member 61 and the fastener 62.

In other embodiments, the handwheel 71 may be driven by a motor. The fastener 62 is provided with pressure sensor near one side of electric core, and when the motor drive fastener 62 compresses tightly the electric core, pressure sensor is used for detecting the pressure that fastener 62 applyed the electric core, when pressure sensor reached the pressure value that presets, through PLC control system or singlechip control motor stop operation.

In other embodiments, other moving assemblies 70 may be used to move the fastener 62, and the embodiment of the moving assembly 70 is not limited as long as the fastener 62 can be moved toward the fixing member 61.

The first moving member 45, the second moving member 34 and the fixed member 53 in the embodiment of the present utility model may be common parts such as bolts, screws, rivets, pins, etc., and in the embodiment of the present utility model, the first moving member 45, the second moving member 34 and the fixed member 53 are bolts.

The operation method of the welding tool comprises the following steps:

placing a plurality of stacked square-shell battery cell groups on the base 10, tightly leaning one side of the battery cell groups on the fixing piece 61, tightly leaning the adjacent side of the battery cell groups on one side of the positioning piece 50, and enabling the pole columns on the battery cell groups to vertically correspond to the pressure heads 41 of the first adjusting units 31 by moving the positioning piece 50;

moving the fastener 62 by the moving assembly 70 such that the fastener 62 is pressed against one side of the cell stack, clamping the cell stack between the fixing member 61 and the fastener 62;

the height of the pressing plate 311 is adjusted according to the height of the battery cell group;

the distance between two adjacent pressure heads 41 in the first group of pressure head assemblies 40 is adjusted according to the thickness of the battery core and the position of the pole, and the position of the pressure head 41 in the second group of pressure head assemblies 40 is adjusted according to the position of the pole of the battery core, so that the pressure head assemblies 40 can accurately compress the bus bar onto the pole of the battery core;

the bus bars and the cell poles are welded by transmitting a welding laser to the ram 41 through a welding head on the operation hole 313 or an external welder device.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described 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 above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A battery module welding frock, its characterized in that includes:

a support assembly;

the adjusting assembly comprises a first adjusting unit and a second adjusting unit fixedly connected with the first adjusting unit, the first adjusting unit and the second adjusting unit are connected with the supporting assembly, the first adjusting unit is arranged in an extending mode along a first direction, and the second adjusting unit is arranged in an extending mode along a second direction; and

The pressure head assembly is provided with two groups, every group the pressure head assembly include first moving part and with the pressure head that first moving part is connected, two groups first moving part respectively with first adjusting unit the second adjusting unit is connected, a set of moving part can follow the first direction removes, another group first moving part can follow the second direction removes, the pressure head is provided with the through-hole, the through-hole is used for supplying laser to pass.

2. The battery module welding fixture of claim 1, wherein the adjustment assembly further comprises a third adjustment unit extending along the first direction, the third adjustment unit being connected between the second adjustment unit and the first moving member such that the first moving member is movable along the first direction and the second direction.

3. The welding fixture of a battery module according to claim 2, wherein the third adjusting unit is provided with a second moving member, and the third adjusting unit is movably connected with the second adjusting unit by means of the second moving member.

4. The battery module welding fixture of claim 2, wherein one of the first adjusting unit, the second adjusting unit and the third adjusting unit is a target adjusting unit, the target adjusting unit comprises an adjusting plate, the adjusting plate is provided with an adjusting hole and an operating hole, the adjusting hole is arranged at intervals with the operating hole, the adjusting hole is connected with the first moving member, and the orthographic projection of the operating hole and the through hole on a plane where the through hole is located has an overlapping area.

5. The battery module welding fixture of claim 1, wherein the ram assembly further comprises a first mounting member, a second mounting member, and a connecting member, the first mounting member being connected to the second mounting member by means of the connecting member, the first mounting member being configured to mount the ram, the connecting member being configured to enable the first mounting member to move relative to the second mounting member, the second mounting member being connected to the moving portion, the second mounting member being provided with a channel in which at least a portion of the ram is movable.

6. The battery module welding fixture of claim 5, wherein the connecting member comprises a slide bar portion and a threaded portion connected to the slide bar portion, the slide bar portion is connected to the first mounting member, and the threaded portion is connected to the second mounting member.

7. The battery module welding fixture of claim 5, wherein the ram assembly further comprises an elastic member disposed between the first mounting member and the second mounting member, the elastic member is sleeved on the connecting member, and the elastic member is configured to release an elastic force to press the ram to the object to be welded.

8. The battery module welding fixture of claim 1, further comprising a base and a positioning member, the base being connected to the support assembly, the positioning member being connected to the base, the positioning member being movable relative to the base.

9. The battery module welding fixture of claim 8, further comprising a securing member and a fastener, the securing member coupled to the base, the fastener movable relative to the base toward the securing member.

10. The battery module welding fixture of claim 1, wherein the adjustment assembly is movably connected to the support assembly, the support assembly is provided with a locking member, the locking member is movable along an axial direction of the support assembly, and the locking member is used for locking the adjustment assembly.