CN209578605U - Tab welding hold-down mechanism - Google Patents

Abstract

The utility model relates to a kind of tab welding hold-down mechanism, in tab and conducting connecting part welding process, tab to be pressed on conducting connecting part, the tab welding hold-down mechanism includes: pedestal, is held down assembly and resilient support assemblies.It holds down assembly and is rotationally connected with the pedestal, it is described to hold down assembly including the pressure head for being pressed in tab on conducting connecting part.Resilient support assemblies are for flexibly supporting the pedestal and described holding down assembly, when the pressure head is under pressure, relative to the base rotation, the resilient support assemblies elastic deformation can occur for the pressure head, to provide elastic anchorage force between the pedestal and the pressure head.Tab welding mechanism in the application is bonded tab with busbar connector perfection, improves welding quality in soldering polar ear and busbar connector.

Description

Tab welding hold-down mechanism

Technical field

The utility model relates to battery processing technique fields, more particularly to a kind of tab welding hold-down mechanism.

Background technique

New-energy automobile provides energy by power battery.The battery modules of power battery are to pass through several single battery cores Conducting connecting part forms in series and parallel.

Wherein, single battery core is equipped with for conductive tab, and busbar connector is used for as a kind of common conducting connecting part Tab in different single battery cores is electrically connected.Common, the connection type of tab and conducting connecting part has welding, spiral shell It connects and three kinds of forms of mechanical crimp.Wherein, power battery is divided into soft-package battery and hard shell battery, Soft Roll electricity according to battery shape again Pond has the characteristics that flexible design, light-weight, internal resistance is small, not easy to explode, cycle-index is more, energy density is high, can be in existing skill The energy density that power battery is promoted in art level, further reduces the gap with fuel vehicle on course continuation mileage.

Since battery modules are to be formed in series and parallel by several single battery cores by conducting connecting part, most of Soft Roll on the market Battery is series-parallel between realizing single battery core by busbar connector.In general, in soldering polar ear and busbar connector, using whole pressing Mode, the tab of several single battery cores is pressed on the busbar together.Since soft-package battery consistency is very poor, after tab bending The position and angle being overlapped on above busbar connector are different, this results in these tabs not in a plane, using whole pressing Mode cause these tabs completely sturdy with busbar connector, and then the problem of lead to rosin joint, eventually lead to welding effect compared with Difference.

Utility model content

Based on this, it is necessary in view of the above technical problems, provide a kind of tab welding hold-down mechanism.

A kind of tab welding hold-down mechanism, for tab being pressed on and is led in tab and conducting connecting part welding process On electrical connector, the tab welding hold-down mechanism includes:

Pedestal；

It holds down assembly, is rotationally connected with the pedestal, it is described to hold down assembly including for tab to be pressed in conductive connection Pressure head on part；And

Resilient support assemblies, for flexibly support the pedestal and it is described hold down assembly, when the pressure head is under pressure, Relative to the base rotation, the resilient support assemblies elastic deformation can occur for the pressure head, in the pedestal and institute It states and elastic anchorage force is provided between pressure head.

The pressure head is strip in one of the embodiments, so that the tab in a single battery core is pressed in and leads On electrical connector.

The resilient support assemblies have two groups in one of the embodiments, and be separately positioned on it is described hold down assembly with The two sides of the rotation axis of the pedestal.

Described hold down assembly further includes installation part in one of the embodiments, and the installation part is rotationally connected with described Pedestal, the pressure head are fixedly connected on the installation part.

There are between the installation part and the pedestal gap, the resilient support assemblies in one of the embodiments, It is set in the gap.

Resilient support assemblies described in two groups are provided with precompression in one of the embodiments, and the precompressed force value is big In the gravity value to hold down assembly.

The pressure head is made of red copper in one of the embodiments,.

The tab welding hold-down mechanism further includes torque-feedback component in one of the embodiments, and the torque is anti- It presents component and connects the pedestal, tab is pressed in and leads for driving the movement that holds down assembly by the torque-feedback component Electrical connector.

The torque-feedback component includes servo drive unit, screw rod moving cell and leads in one of the embodiments, To unit, screw rod moving cell one end connects to hold down assembly described in the servo drive unit, other end connection, described to watch It takes driving unit and is set with maximum moment value, the servo drive unit drives the compression group by the screw rod moving cell Part is moved along the pilot unit, described after the resistance of motion of the servo drive unit reaches the maximum moment value Servo drive unit stops the movement that holds down assembly described in driving.

The tab welding hold-down mechanism further includes torque-feedback component and moving assembly in one of the embodiments, The pedestal is fixed on the moving assembly, and the moving assembly is for driving the movement that holds down assembly tab to be pressed in Conducting connecting part, the torque-feedback component are the force snesor on described hold down assembly.

The utility model has the advantages that pressure head is pressed on product, pressure head passes through bullet relative to base rotation according to the shape of product surface Property support component occur elastic deformation, to provide elastic anchorage force between pedestal and pressure head, to make tab welding compacting machine Structure is capable of the shape of adaptive product surface, is bonded tab with busbar connector perfection, improves welding quality.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the tab welding device in the application one embodiment；

Fig. 2 is the structural schematic diagram of the product space aligning gear in the application one embodiment in tab welding device；

Fig. 3 is status diagram of the product in welding in the application one embodiment；

Fig. 4 is the structural schematic diagram of the product orientation mechanism of tab welding device in the application one embodiment；

Fig. 5 is the welding mechanism of tab welding device and the knot of tab welding hold-down mechanism in the application one embodiment Structure schematic diagram；

Fig. 6 is the part-structure signal of the tab welding hold-down mechanism of tab welding device in the application one embodiment Figure；

Fig. 7 a and Fig. 7 b are respectively the schematic diagram of two different working conditions of tab welding hold-down mechanism shown in fig. 6；

State when Fig. 8 is the tab welding hold-down mechanism compression product of tab welding device in the application one embodiment Schematic diagram；

Fig. 9 is the structural schematic diagram of the tab welding hold-down mechanism of tab welding device in another embodiment of the application；

Figure 10 is the structural schematic diagram of the torque-feedback component of tab welding device in the application one embodiment.

Appended drawing reference: 10, product；11, the first side；12, second side；13, third side；14, the 4th side；100, rack； 200, conveying mechanism；210, guide assembly；220, pallet component；300, welding mechanism；400, product space aligning gear；410, Mounting plate；420, the first driving assembly；431, the first gripping finger；432, the second gripping finger；440, the second driving assembly；450, gantry Frame；500, product orientation mechanism；510, plate is supported；520, third driving assembly；521, output end；522, servomotor； 523, screw rod slide block mechanism；600, tab welding hold-down mechanism；610, pedestal；620, it holds down assembly；621, pressure head；6211, it presses Tight face；622, installation part；623, gap；630, resilient support assemblies；640, rotation axis；650, torque-feedback component；651, it watches Take driving unit；652, screw rod moving cell；6521, sliding shoe；653, pilot unit；700, servo mobile mechanism；800,CCD Positioning mechanism.

Specific embodiment

The utility model is described more fully referring to relevant drawings for the ease of understanding the utility model,. The utility model preferred embodiment is given in attached drawing.But the utility model can be realized in many different forms, and It is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes the utility model disclosure Understand more preferably thorough and comprehensive.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper", There is no intermediary elements.Term as used herein "vertical", "horizontal", "left" and "right" and similar statement are For illustrative purposes.

As shown in Figure 1, Fig. 1 shows the overall structure diagram of the tab welding device in the application one embodiment. Tab welding device includes rack 100, conveying mechanism 200, welding mechanism 300 and product space aligning gear 400.Wherein, machine Frame 100 is used as load-bearing part, for carrying each clamp mechanism of tab welding device.The tab welding mechanism 300 is used for battery The tab of mould group is welded with conducting connecting part.

Wherein, battery modules include several single battery cores, and single battery core divides positive and negative electrode, and tab is exactly from single battery core The metallic conductor that anode and cathode are extracted.Several single battery cores constitute battery modules after series-parallel.Monomer Between battery core is connected by electric conductor in series and parallel, common, by busbar connector as conducting connecting part, different monomers Tab in battery core is electrically connected with busbar connector, wears parallel connection between single battery core to realize.

Wherein, conveying mechanism 200 is used for conveying products, and the product in the application refers to battery modules, single battery core, pole One or more of ear and busbar connector.Product space aligning gear 400 is used to carry out position to the product in conveying mechanism 200 Correction is passing through welding mechanism 300 for tab welding in busbar connector to guarantee that product is put in welding according to accurate posture When upper, the position of welding is accurate, and the product that product space aligning gear 400 clamps during the welding process, to prevent from producing Product move in the welding process, to improve the stability of welding process, and the accuracy of welding.

As shown in Fig. 2, Fig. 2 is the structural schematic diagram of the product space aligning gear 400 in one embodiment.Product space Aligning gear 400 includes mounting plate 410, the first driving assembly 420, gripping finger 431,432 and the second driving assembly 440.Wherein, First driving assembly 420 is for drive installation plate 410 relative to 100 elevating movement of rack.Second driving assembly 440 and gripping finger are equal It is arranged on mounting plate 410, and with 410 synchronization lifting of mounting plate.Gripping finger includes be slidably mounted on mounting plate 410 One gripping finger 431 and the second gripping finger 432, the first gripping finger 431 and the second gripping finger 432 can be under the drivings of the second driving assembly 440 It synchronizes close and separate.For example, when product moves to below product space aligning gear 400 on conveying mechanism 200, at this time Position precision of the product on conveying mechanism 200 is lower, and when welding, welding mechanism 300 is easy misalignment welding position and causes It is partially welded.By the decline of 420 drive installation plate 410 of the first driving assembly and close to product, the first folder of the second driving assembly 440 driving Refer to 431 it is synchronous with the second gripping finger 432 is moved and closed to centre, the first gripping finger 431 and the second gripping finger 432 are close and be clamped in production The two sides of product, thus by the product on conveying mechanism 200 to moving in the middle part of product space aligning gear 400.

In one embodiment, referring to fig. 2, product space aligning gear 400 includes the portal frame being mounted in rack 100 450, optionally, there are two product space aligning gears 400 for setting in rack 100, that is to say, that tab welding device can wrap Two welding posts are included, in welding, two welding posts are welded simultaneously, are greatly improved work efficiency.

The first driving assembly 420 and the second driving assembly 440 are cylinder in one of the embodiments,.Cylinder has Fast response time, the stable advantage of chucking power can guarantee quick response when product space aligning gear 400 works, improve work Make efficiency.Specifically, the second driving assembly 440 can be two-way cylinder, and there are two move towards opposite direction for two-way cylinder tool Output end, the first gripping finger 431 and the second gripping finger 432 be separately mounted on two output ends, when the second driving assembly 440 works When, what the first gripping finger 431 and the second gripping finger 432 can be synchronous is close and separate.Pass through the first gripping finger 431 and the second gripping finger 432 Synchronous draws close product clamping to centre, can accurately be fixed on product space correction machine after capable of guaranteeing product space correction The middle part of structure 400, so that welding structure be enable accurately to find the welding position of product.

In some embodiments, the second driving assembly 440 can also be the screw rod by Serve Motor Control, have on screw rod Two sections of opposite screw threads, two sections of screw rod are threaded with movable block respectively, when servo motor driving screw rod rotation, two movements Block can synchronize close and separate relative to screw rod, and the first gripping finger 431 and the second gripping finger 432 are separately fixed at two movable blocks On.

Referring to status diagram of the product 10 in welding that Fig. 3, Fig. 3 are in one embodiment, product 10 includes first Side 11, second side 12, third side 13 and the 4th side 14, the first gripping finger 431 support second side 12 in product 10, the second gripping finger 432 support in the 4th side 14 of product 10, so that product 10 is carried out position school to the middle part of product space aligning gear 400 Just, in the welding process, the first gripping finger 431 and the second gripping finger 432 hold product 10 always, to prevent in the welding process, The posture of product or position deviate.

Referring to Fig. 1, tab welding device further includes product orientation mechanism 500 and tab welding hold-down mechanism 600 (referring to figure 3).In conjunction with Fig. 3, in welding, product orientation mechanism 500 is supported in the third side 13 of product 10, tab welding hold-down mechanism 600 Product is compressed from the first side 11 of product 10, i.e., lug and strap is compressed by tab welding hold-down mechanism 600, is then led to It crosses welding mechanism 300 to weld product 10 in the first side 11 of product 10, to realize the connection of lug and strap.One In a little embodiments, the two sides of battery modules are arranged in tab, i.e. the first side 11 and third side 13 of battery modules are provided with pole Ear realizes tab and remittance in the third side 13 of product at this point, product is rotated 180 ° after the tab for having welded the first side 11 Flow the welding of row.By the way that product orientation mechanism 500 is arranged, product orientation mechanism 500 is supported in the third side 13 of product, prevents pole Ear welds hold-down mechanism 600 close to product and when supporting product, and mobile offset occurs for product.

Specifically, referring to fig. 4, Fig. 4 is the structural schematic diagram of the product orientation mechanism 500 in one embodiment.Product is fixed Position mechanism 500 includes supporting plate 510 and third driving assembly 520.Third driving assembly 520 supports plate 510 relatively for driving Mobile in rack 100, to support in the third side 13 of product 10, tab welding hold-down mechanism 600 is close later and supports and is producing First side 11 of product.Wherein, the first driving assembly 420, the second driving assembly 440 and third driving assembly 520 include straight line The output end of movement supports plate 510 and is fixed on the output end 521 of third driving assembly 520.In one embodiment, third Driving assembly 520 includes servomotor 522, the screw rod slide block mechanism 523 driven by servomotor 522, in servo-electric Under the driving of machine 522, the sliding block on screw rod in screw rod slide block mechanism 523 is moved in a straight line, and supports 510 connection sliding block of plate (i.e. Output end 521), and close to or far from product under the driving of sliding block.When product moves to 400 lower section of product space aligning gear When, the driving of third driving assembly 520 supports plate 510 close to product, and supports on product, then tab welding hold-down mechanism 600 on being pressed on product, to realize the clamping before the position correction and welding to product.In some embodiments, Third driving assembly 520 or cylinder or hydraulic cylinder.

As shown in figure 5, Fig. 5 is the structure of the welding mechanism 300 and tab welding hold-down mechanism 600 in one embodiment Schematic diagram.In conjunction with Fig. 3, when welding, first choice is pressed on product 10 by tab welding hold-down mechanism 600, realizes product 10 Then positioning welds product 10 by welding mechanism 300.

As shown in fig. 6, Fig. 6 is the partial structure diagram of the tab welding hold-down mechanism 600 in one embodiment.Tab Hold-down mechanism 600 is welded in the welding process, for tab to be pressed on conducting connecting part.Tab welding hold-down mechanism 600 Including pedestal 610, hold down assembly 620 and resilient support assemblies 630.Wherein, it holds down assembly and 620 is rotationally connected with pedestal 610, press Tight component 620 includes the pressure head 621 for being pressed in tab on conducting connecting part.Fig. 7 a and Fig. 7 b are respectively shown in fig. 6 The schematic diagram of two different working conditions of tab welding hold-down mechanism 600.Since the tab on product 10 overlaps after bending Position and angle on the busbar is different, so as to cause in these tabs not another plane, passes through 620 rotations that hold down assembly It is connected to pedestal 610,620 is adjusted according to the concrete shape and position of these tabs to enable to hold down assembly, to protect Card holds down assembly and 620 can contact with the tab on product.Resilient support assemblies 630 are for flexibly supporting pedestal 610 and compressing Component 620, when pressure head 621 is under pressure, pressure head 621 is rotated relative to pedestal 610, and resilient support assemblies 630 can occur Elastic deformation, to provide elastic anchorage force between pedestal 610 and pressure head 621.

For example, resilient support assemblies 630 can have the part of certain elastic anchorage force for spring etc..A reality wherein Apply in example, referring to figs. 7a and 7b, resilient support assemblies 630 can there are two, and be separately positioned on hold down assembly 620 and pedestal The two sides of 610 rotation axis 640, the both ends of each resilient support assemblies 630 are individually fixed in pedestal 610 and hold down assembly 620. Certainly, the both ends of each resilient support assemblies 630 can also be only supported at pedestal 610 and hold down assembly on 620.

For another example, resilient support assemblies 630 also can be set one group, such as one group of setting of resilient support assemblies 630 is compressing One end of the rotation axis 640 of component 620 and pedestal 610, the both ends of resilient support assemblies 630 are individually fixed in pedestal 610 and pressure Tight component 620.

For another example, holding down assembly is the compression that can be understood as in above-described embodiment of rotation connection between 620 and pedestal 610 Component 620 is rotationally connected with pedestal 610 by the rotation axis 640 of entity, it is understood that for 620 and the pedestal 610 of holding down assembly Between be to have virtual shaft.Only connected by 630 entity of resilient support assemblies between 620 and pedestal 610 for example, holding down assembly It connects, not the rotation axis 640 of entity, the relative rotation between 620 and pedestal 610 that holds down assembly is to pass through resilient support assemblies What 630 flexible deformation was realized.

It is respectively set in the embodiment of resilient support assemblies 630 in 640 two sides of rotation axis, is in resilient support assemblies 630 It is provided with precompression.The value of the precompression be greater than hold down assembly 620 gravity value.When tab welding hold-down mechanism 600, to scheme Posture shown in 7a along the horizontal plane direction it is mobile to clamp product when, hold down assembly 620 gravity under, hold down assembly 620 can rotate down relative to rotation axis 640, by the way that the value of the precompression of resilient support assemblies 630 is set greater than compression The value of the gravity of component 620, so that tab welding hold-down mechanism 600 in malcompression product, is able to maintain horizontality, that is, presses First 621 seal face 6211 for compressing product 10 is to maintain vertical state.In some embodiments, tab welding compresses Mechanism 600 can also move along the vertical direction to compress product 10, at this point, seal face 6211 is substantially on the horizontal level 's.At work, tab welding hold-down mechanism 600 is different according to the location status of the tab on product, holds down assembly 620 to turn On the basis of moving axis 640, the location status of adaptive tab guarantees that pressure head 621 is bonded to the greatest extent with tab, at this point, elastic Support component 630 plays the role of flexible adaptation tab tilt angle.

As shown in figure 8, Fig. 8 shows the shape when tab welding hold-down mechanism 600 in one embodiment compresses product 10 State schematic diagram.Product 10 is soft-package battery, and soft-package battery is rearranged by several single battery cores along horizontal direction.Each battery core The left and right sides be provided with tab.Pressure head 621 is strip.The pressure head 621 of strip can once compress a monomer Tab in battery core.If the tab of disposable whole soft-package battery side compresses, due to the tab in each single battery core Shape and position may be different, in fact it could happen that the case where tab for the single battery core having is not forced into.When welding, pass through tab It welds compressing structure to compress the tab in a single battery core on the busbar, tab is then realized by welding mechanism 300 With the welding of busbar connector；Then the tab for tab welding hold-down mechanism 600 being shifted and being pressed in another single battery core, such as This is sequentially completed the welding of tab and busbar connector on entire soft-package battery.

In some embodiments, referring to Fig. 6, holding down assembly 620 further includes installation part 622, and installation part 622 is rotationally connected with On pedestal 610, pressure head 621 is fixedly connected on installation part 622.Optionally, referring to Fig. 7 a, have between installation part 622 and pedestal 610 There is gap 623, resilient support assemblies 630 are arranged in gap 623.The pole in another embodiment is shown referring to Fig. 9, Fig. 9 Ear welds the structural schematic diagram of hold-down mechanism 600, is very close to each other, elasticity branch between installation part 622 and pedestal 610 in Fig. 9 The both ends of support component 630 are separately fixed on pedestal 610 and installation part 622.

In some embodiments, pressure head 621 is made of red copper.Due to compress welding during, instantaneous temperature It is higher.Tab and busbar connector compression be bondeds by pressure head 621, since red copper is with good heating conduction, better heat-radiation effect, It ensure that the quality and effect of welding.

Referring to Fig. 5, in some embodiments, tab welding hold-down mechanism 600 further includes torque-feedback component 650, torque Feedback component 650 connects pedestal 610, and tab is pressed in by torque-feedback component 650 for driving 620 movements that hold down assembly Conducting connecting part.It is the structural schematic diagram of the torque-feedback component 650 in one embodiment for example, with reference to Figure 10, Figure 10.Torque Feedback component 650 includes servo drive unit 651, screw rod moving cell 652 and pilot unit 653.Wherein, screw rod moving cell 652 one end connect servo drive unit 651, one end of the sliding shoe 6521 of screw rod moving cell 652 by gear transmission structure Connection holds down assembly 620, and specifically, sliding shoe 6521 holds down assembly 620 by the connection of pedestal 610.Servo drive unit 651 It such as can be servo motor, servo motor is in addition to that can also receive the torque of feedback, that is to say, that sliding shoe with output torque The resistance of 6521 movements can be received by servo motor.Servo drive unit 651 is set with maximum moment value, servo drive unit 651 are held down assembly by the driving of screw rod moving cell 652 620 moves along pilot unit 653, when hold down assembly 620 pressure head 621 when being pressed on product, and the resistance of motion will steeply rise on sliding shoe 6521, watches when the resistance of motion of sliding shoe 6521 is greater than When taking the maximum moment value of the setting of driving unit 651, servo drive unit 651 stops driving 620 movements that hold down assembly, compression group Part 620 is remained pressed against on product with stable pressing force.Since the mechanical strength of soft-package battery is lower, pass through torque-feedback group Part 650 can control the extruding force for the 620 pairs of products that hold down assembly, to prevent soft-package battery from being become by biggish extruding force Shape damage.

In other embodiments (not shown go out), tab welding hold-down mechanism includes moving assembly and torque-feedback component, Torque-feedback component in the present embodiment can be force snesor, and force snesor, which is set to, to hold down assembly on 620.Moving assembly example For example three axis servo moving assemblies.Moving assembly is arranged in rack 100, and moving assembly holds down assembly 620 relatively for driving It moves in rack 100 tab to be pressed on conducting connecting part.

In some embodiments, referring to Fig. 5, tab welding device includes servo mobile mechanism 700, wherein servo is mobile Mechanism 700 can be used as the moving assembly in above-described embodiment.Servo mobile mechanism 700 is three axis translation devices, can be driven Dynamic driven member moves on tri- axis of XYZ.Tab welding device further includes CCD positioning mechanism 800, CCD positioning mechanism 800, Tab welding hold-down mechanism 600 and welding mechanism 300 are arranged in servo mobile mechanism 700.CCD positioning mechanism 800 is used Location information in the welding position of testing product, servo mobile mechanism 700 are used to drive welding mechanism 300 according to location information It is welded in the welding position of product.When welding, the product on conveying mechanism 200 is determined by CCD positioning mechanism 800 Position, to guarantee the accuracy of 300 welding position of accuracy and welding mechanism of 400 depressed position of product space aligning gear, Prevent the phenomenon that pressing partially or being partially welded.

In some embodiments, referring to Fig. 1, conveying mechanism 200 include guide assembly 210 in the rack 100 and The pallet component 220 moved along guide assembly 210.Conveying mechanism 200 further includes jacking rotary component (not shown), jacking Rotary components are arranged below product space aligning gear 400, when pallet component 220 moves to product space aligning gear 400 When lower section, jacking rotary component jacks up pallet component 220, is then positioned, is clamped and welding process, to prevent fixed When position clamps and welds, pallet component 220 is moved relative to guide assembly 210.In the tab for having welded product one side Afterwards, pallet component 220 is rotated 180 ° by jacking rotary component, then proceeds by positioning, clamping and welding process.

In some embodiments, jacking rotary component for example may include cylinder or the rotating group that cylinder head is arranged in Part, runner assembly include rotating disc and motor, and motor is for driving turn disc.Each technology of embodiment described above Feature can be combined arbitrarily, for simplicity of description, not all possible to each technical characteristic in above-described embodiment Combination is all described, as long as being all considered to be this specification record however, there is no contradiction in the combination of these technical features Range.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (10)

1. a kind of tab welding hold-down mechanism, in tab and conducting connecting part welding process, tab to be pressed on conduction On connector, which is characterized in that the tab welding hold-down mechanism includes:

Pedestal；

It holds down assembly, is rotationally connected with the pedestal, it is described to hold down assembly including for tab to be pressed in conducting connecting part Pressure head；And

Resilient support assemblies, for flexibly support the pedestal and it is described hold down assembly, it is described when the pressure head is under pressure Relative to the base rotation, the resilient support assemblies elastic deformation can occur for pressure head, in the pedestal and the pressure Elastic anchorage force is provided between head.

2. tab welding hold-down mechanism according to claim 1, which is characterized in that the pressure head is strip, so that one Tab in a single battery core is pressed on conducting connecting part.

3. tab welding hold-down mechanism according to claim 1, which is characterized in that the resilient support assemblies have two groups, And it is separately positioned on the two sides to hold down assembly with the rotation axis of the pedestal.

4. tab welding hold-down mechanism according to claim 3, which is characterized in that described hold down assembly further includes installation Part, the installation part are rotationally connected with the pedestal, and the pressure head is fixedly connected on the installation part.

5. tab welding hold-down mechanism according to claim 4, which is characterized in that between the installation part and the pedestal With gap, the resilient support assemblies are set in the gap.

6. tab welding hold-down mechanism according to claim 3, which is characterized in that resilient support assemblies described in two groups are all provided with It is equipped with precompression, the precompressed force value is greater than the gravity value to hold down assembly.

7. tab welding hold-down mechanism described in -6 any one according to claim 1, which is characterized in that the pressure head is by red copper It is made.

8. tab welding hold-down mechanism described in -6 any one according to claim 1, which is characterized in that the tab welding pressure Tight mechanism further includes torque-feedback component, and the torque-feedback component connects the pedestal, and the torque-feedback component is for driving The dynamic movement that holds down assembly, is pressed in conducting connecting part for tab.

9. tab welding hold-down mechanism according to claim 8, which is characterized in that the torque-feedback component includes servo Driving unit, screw rod moving cell and pilot unit, screw rod moving cell one end connect the servo drive unit, another It holds down assembly described in the connection of end, the servo drive unit is set with maximum moment value, and the servo drive unit passes through described It holds down assembly described in the driving of screw rod moving cell and is moved along the pilot unit, when the resistance of motion of the servo drive unit After reaching the maximum moment value, the servo drive unit stops the movement that holds down assembly described in driving.

10. tab welding hold-down mechanism described in -6 any one according to claim 1, which is characterized in that the tab welding Hold-down mechanism further includes torque-feedback component and moving assembly, and the pedestal is fixed on the moving assembly, the moving assembly For driving the movement that holds down assembly tab is pressed in conducting connecting part, the torque-feedback component is set on the pressure Force snesor on tight component.