CN112059420B - Collector plate welding pressure head and welding method thereof - Google Patents
Collector plate welding pressure head and welding method thereof Download PDFInfo
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- CN112059420B CN112059420B CN202011275269.2A CN202011275269A CN112059420B CN 112059420 B CN112059420 B CN 112059420B CN 202011275269 A CN202011275269 A CN 202011275269A CN 112059420 B CN112059420 B CN 112059420B
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- 238000003466 welding Methods 0.000 title claims abstract description 177
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 description 28
- 210000004027 cell Anatomy 0.000 description 19
- 238000005452 bending Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The embodiment of the invention provides a collector plate welding pressure head and a welding method thereof, wherein the collector plate welding pressure head comprises a pressure head body, the pressure head body is provided with an attaching surface for attaching to a collector plate and a welding surface corresponding to the attaching surface, and the welding surface is provided with a tool hole penetrating towards the attaching surface; the tool hole comprises a vertical section and a chamfer section, one end of the vertical section is formed on the attaching surface, the other end of the vertical section is connected with one end of the chamfer section, the chamfer sections are circumferentially arranged along the edge of the tool hole, and the other end of the chamfer section is formed on the welding surface; the invention provides a sufficient movable interval for the gun head of the spot welding machine based on the chamfer section, so that the gun head of the spot welding machine can effectively prevent the current collecting disc and the pressure head body from being welded into a whole while carrying out spot welding on the current collecting disc by taking the edge of the tool hole as a welding path, thereby ensuring the effective welding area for welding the current collecting disc, improving the stability of a welding point and the uniformity and stability of battery flow guiding, and achieving better welding quality.
Description
Technical Field
The invention relates to the technical field of battery processing, in particular to a collector plate welding pressure head and a welding method thereof.
Background
The battery core is the most important component of the battery, and the battery core can be assembled to form the battery after being sequentially processed by the processes of mechanical/ultrasonic kneading, encapsulation, shell entering, current collecting disc welding, tab bending and the like. Therefore, the performance of the battery core has direct influence on the performance of the battery, and the preparation process of the battery core before the battery is assembled is very important.
Currently, when the current collecting disc is welded, the current collecting disc is usually attached to the end of the electric core, then the welding pressure head is pressed on the current collecting disc, then the gun head of the laser spot welding machine is extended to a tool hole formed in the welding pressure head, and welding operation is performed on the current collecting disc along the edge of the tool hole.
However, the existing welding pressure head has a simple structure, and only a through-shaped tool hole is formed in the welding pressure head, that is, the hole wall of the tool hole is perpendicular to the end surface of the welding pressure head, and when the current collecting disc is welded, the gun head of the laser spot welding machine usually extends to the end of the battery cell at a preset inclination angle. Meanwhile, under the condition that the effective welding area of the current collecting disc is reduced, the stability of a welding point and the uniformity and stability of battery current guiding are difficult to ensure, and the condition that a welding pressure head and the current collecting disc are welded into a whole is easy to occur, so that the welding quality is difficult to ensure.
Disclosure of Invention
The embodiment of the invention provides a collector plate welding pressure head and a welding method thereof, which are used for solving the problems that when the collector plate is welded through a welding pressure head at present, the effective welding area for welding the collector plate is difficult to ensure, and the welding pressure head and the collector plate are easily welded into a whole, so that the welding quality is influenced.
The embodiment of the invention provides a collector plate welding pressure head, which comprises: the pressure head body and the chamfer section; the pressure head body is provided with an attaching surface for attaching to the current collecting disc and a welding surface corresponding to the attaching surface, and the welding surface is provided with a tool hole penetrating towards the attaching surface; and the tool hole comprises a vertical section and a chamfer section, one end of the vertical section is formed on the attaching surface, the other end of the vertical section is connected with one end of the chamfer section, the chamfer section is arranged along the edge of the tool hole in a circumferential direction, and the other end of the chamfer section is formed on the welding surface.
According to the collector plate welding pressure head provided by the embodiment of the invention, the shape of the chamfer section comprises a bevel chamfer structure or a round chamfer structure.
According to the collector plate welding pressure head provided by the embodiment of the invention, the shape of the tool hole comprises any one of a circle, a sector, a straight line and a bent shape; and/or the tool holes comprise a plurality of holes and are circumferentially arranged relative to the disk center of the current collecting disk.
The collector plate welding ram according to one embodiment of the present invention further comprises: and the positioning structure is formed on the attaching surface and axially surrounds the outer side of the tool hole so as to position the end part of the battery cell of the pre-welded current collecting disc.
According to the collector plate welding pressure head provided by the embodiment of the invention, the positioning structure is a profile groove, the wall of the profile groove is provided with a relief notch, the shape of the notch of the profile groove is matched with the end part of the battery core, and the tooling hole is formed at the bottom of the profile groove.
According to the collector plate welding pressure head provided by the embodiment of the invention, the groove wall of the profile groove is gradually expanded from the groove bottom to the attached surface; and/or annular positioning grooves distributed along the groove wall are formed at the bottom of the profiling groove.
According to the collector welding pressure head provided by the embodiment of the invention, the inner wall surface of the profiling groove is provided with the plastic spraying layer.
According to the current collecting disc welding pressure head provided by the embodiment of the invention, the pressure head body is a metal shaping component; and/or the pressure head body is also provided with an installation position.
The embodiment of the invention also provides a current collecting disc welding method of the current collecting disc welding pressure head, which comprises the following steps: s1, clamping the current collecting disc between the pre-welding end of the battery cell and the pressure head body; and S2, adjusting the space coordinate of the laser spot welding machine, controlling the gun head of the laser spot welding machine to extend to the joint of the collecting disc and the edge of the tool hole, and performing spot welding on the collecting disc by taking the edge of the tool hole as a welding path.
According to the manifold plate welding method of one embodiment of the present invention, S2 further includes: welding the current collecting plate by using a laser spot welding machine; and/or monitoring the temperature of the pressure head body in real time during welding of the current collecting disc, and controlling the temperature of the pressure head body to be maintained within a preset threshold interval by adopting a cooling device.
The invention provides a current collecting disc welding pressure head and a welding method thereof, which are characterized in that a tool hole is arranged on a pressure head body, chamfer sections arranged along the edge of the tool hole are arranged, when the current collecting disc is pressed on the end part of a battery core through the pressure head body, and the current collecting disc is welded, because the chamfer sections provide abundant movable sections for a gun head of a spot welding machine, and vertical sections are arranged, the situation that the current collecting disc and the pressure head body are welded into a whole is avoided when the gun head of the spot welding machine is welded along the movable sections provided by the chamfer sections, so that the gun head of the spot welding machine can take the edge of the tool hole as a welding path to perform spot welding on the current collecting disc, the current collecting disc and the pressure head body are effectively prevented from being welded into a whole, the effective welding area for welding the current collecting disc is ensured, and the stability of a welding point and the uniformity and stability of battery diversion are improved, thereby achieving better welding quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a first perspective view of a first manifold welding ram according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram illustrating a second view of a first collector plate weld ram according to an embodiment of the present disclosure;
FIG. 3 is a schematic front view of a weld head of the manifold of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a rear view of a weld head of the manifold plate of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a second collector plate weld ram provided by an embodiment of the present invention;
FIG. 6 is a schematic front view of the structure of FIG. 5 in accordance with an embodiment of the present invention;
FIG. 7 is a schematic rear view of the structure of FIG. 5 in accordance with an embodiment of the present invention;
FIG. 8 is a first perspective view of a third collector plate weld ram according to an embodiment of the present invention;
FIG. 9 is a second perspective view of a third manifold welding ram in accordance with an embodiment of the present invention;
FIG. 10 is a flow chart of a cluster plate welding method based on a cluster plate welding ram as described above according to an embodiment of the present invention;
FIG. 11 is a schematic structural view of a clamping mechanism according to an embodiment of the present invention;
FIG. 12 is a schematic view of a mounting arrangement of a collector plate weld ram on a weld platen according to an embodiment of the present invention;
fig. 13 is a schematic structural view of a welding moving mechanism according to an embodiment of the present invention.
In the figure, 1, a collector plate is welded with a pressure head; 101. a ram body; 102. a tooling hole; 103. a chamfer section; 104. profiling grooves; 105. a abdication gap; 106. an annular positioning groove; 107. an installation position; 2. a clamping mechanism; 21. a first telescopic driving mechanism; 22. positioning the head; 23. a second telescopic driving mechanism; 24. welding a pressing plate; 3. a fixed base; 4. a cooling plate; 5. an electric core; 6. a current collecting plate; 7. a welding moving mechanism; 71. a first linear module; 72. a second linear module; 73. a third linear module; 8. an adjusting base; 9. a spot welding machine.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 9, the present embodiment provides a collector plate welding head 1, which includes a head body 101 and a chamfer section 103; the pressure head body 101 is provided with an attaching surface for attaching to the current collecting disc and a welding surface corresponding to the attaching surface, and the welding surface is provided with a tool hole 102 penetrating towards the attaching surface; frock hole 102 includes vertical section and chamfer section 103, and wherein, the vertical section is not specifically illustrated in fig. 1 to 9, and the one end of vertical section is formed at attached face, and the one end of chamfer section 103 is connected to the other end of vertical section, and chamfer section 103 is circumference along the edgewise of frock hole 102 and arranges, and the other end of chamfer section 103 is formed at the welding face.
Specifically, in the embodiment, the tooling hole 102 is formed in the indenter body 101, and the chamfer sections 103 are arranged along the edges of the tooling hole 102, so that when the current collecting disc is pressed on the end of the battery cell through the indenter body 101 and is subjected to welding operation, the chamfer sections 103 provide sufficient movable sections for the gun head of the spot welding machine 9, and the vertical sections prevent the gun head of the spot welding machine from being welded with the indenter body 101 into a whole when welding is performed along the movable sections provided by the chamfer sections 103, so that the gun head of the spot welding machine 9 can be controlled to use the edges of the tooling hole 102 as a welding path to perform spot welding on the current collecting disc, and the current collecting disc and the indenter body 101 are effectively prevented from being welded into a whole, thereby ensuring the effective welding area for welding the current collecting disc, and improving the stability of a welding point and the uniformity and stability of battery flow guiding, thereby achieving better welding quality.
It should be noted that the chamfering section 103 shown in this embodiment may be an inclined chamfering structure, the inclined chamfering structure may be a chamfering surface arranged along the edge of the tooling hole 102 and having an inclination angle of 10 ° to 45 °, or may be a circular chamfering structure arranged along the edge of the tooling hole 102, and the chamfering radius of the circular chamfering structure may be adaptively designed according to the size of the ram body 101 and the actual welding requirements.
Preferably, the shape of the tooling hole 102 shown in the present embodiment includes any one of a circle, a fan, a straight line, and a bent shape. The bending shape shown in this embodiment may be a one-time bending shape, such as an "L" shape or a "V" shape known in the art; it can also be a secondary bend, as known in the art as a "C" shape; it may also be multi-folded, as is known in the art as a zig-zag.
Meanwhile, in order to increase welding spots as much as possible and ensure the welding uniformity and stability of the current collecting plate, a plurality of tool holes 102 are provided in the embodiment, and the plurality of tool holes 102 are uniformly arranged in a circumferential manner with respect to the center of the current collecting plate.
As shown in fig. 1 to 4, in one specific embodiment, the shape of the tooling holes 102 shown in this embodiment is preferably a bending shape that is bent once, the bending angle of the bending shape is 100 ° to 120 °, and two tooling holes 102 are specifically provided, and the two tooling holes 102 are distributed in a central symmetry manner (equivalent to circumferential uniform distribution) with respect to positioning holes on the indenter body 101, where the positioning holes are used for being arranged coaxially with the disk center of the current collecting disk or the axis center of the battery core.
As shown in fig. 5 to 7, in another specific embodiment, the shape of the tooling holes 102 shown in this embodiment is preferably a straight line, three tooling holes 102 are specifically provided, the three tooling holes 102 are uniformly distributed circumferentially with respect to the positioning holes on the indenter body 101, and each tooling hole 102 is radially arranged during welding, so that when a current collecting plate is welded to an end of the electric core, welding points corresponding to each tooling hole 102 are radially arranged along the electric core, thereby ensuring the uniformity of current guiding of the current collecting plate and greatly reducing the internal resistance of the electric core.
As shown in fig. 8 to 9, in a further specific embodiment, the shape of the tooling holes 102 shown in this embodiment is preferably a sector, and the tooling holes 102 are specifically provided with three, and the three tooling holes 102 are circumferentially and uniformly distributed with respect to the positioning holes on the indenter body 101, so that when the end portion of the cell is subjected to manifold welding, welding spots on the manifold are distributed in three regions, and correspondingly along the circumference, the welding spots of each region can be distributed in a sector corresponding to the tooling holes 102, so that the effective area of the welding spots is increased as much as possible, the uniformity of the flow guiding of the manifold can be ensured, and the internal resistance of the cell can be greatly reduced.
As shown in fig. 2, in order to better position the end of the battery cell when the current collecting plate is welded, so that the current collecting plate is firmly clamped between the end of the battery cell and the pressure head body 101, the embodiment further provides a positioning structure, which is formed on the attachment surface of the pressure head body 101 and circumferentially surrounds the outside of the tooling hole 102, so as to position the end of the battery cell of the pre-welded current collecting plate.
It should be noted that the positioning structure shown in this embodiment may be a plurality of positioning protrusions formed on the attachment surface of the indenter body 101, and the plurality of positioning protrusions are arranged circumferentially along the end of the electrical core to position the end of the electrical core; the location structure also can be for forming the constant head tank on attached face, can set up the tip looks adaptation of constant head tank structural and electric core. Of course, the positioning structure may also be in other structural forms, such as a combined structure of the positioning protrusion and the positioning groove, which are not described in detail herein.
As shown in fig. 2 and 7, the positioning structure shown in this embodiment is a contour groove 104, a relief notch 105 is formed on a groove wall of the contour groove 104, a notch shape of the contour groove 104 is adapted to an end of a battery cell, and a tooling hole 102 is formed at a groove bottom of the contour groove 104.
Specifically, because the current collecting disc includes the integrated disc body portion and the flexible connection portion, the one end that the disc body portion was kept away from to the flexible connection portion is used for connecting the cap of battery to based on the shape of current collecting disc, this embodiment can prevent to bring the influence to the shape of flexible connection portion through set up the breach of stepping down 105 on the cell wall of profile groove 104. Thus, the profiling groove 104 shown in this embodiment is used for positioning the end of the battery core and positioning the current collecting disc, and when the end of the battery core extends into the profiling groove 104, the current collecting disc is exactly clamped between the end of the battery core and the bottom of the profiling groove 104, so that the battery core, the current collecting disc and the pressure head body 101 are ensured to maintain a stable assembly structure when the current collecting disc is welded.
As shown in fig. 2, the groove wall of the contour groove 104 shown in this embodiment is gradually enlarged from the groove bottom to the attachment surface, that is, the groove wall of the contour groove 104 is formed into a trumpet shape from the groove bottom to the attachment surface of the indenter body 101, so that the coaxiality of the end of the battery cell can be automatically calibrated in the process of clamping the current collecting disc based on the arrangement of the groove wall shape of the contour groove 104.
Meanwhile, in the battery processing process, the battery core firstly penetrates into the battery case, and then the end part of the battery case is welded with the current collecting plate, in the embodiment, the annular positioning grooves 106 arranged along the groove wall of the groove 104 are arranged at the bottom of the groove 104, so that the end part of the battery case can be further positioned by the annular positioning grooves 106 after the end part of the battery case extends into the groove 104.
Preferably, in order to prevent the scraps generated during the welding process of the manifold block from adhering to the indenter body 101, a plastic-sprayed layer is further disposed on the inner wall surface of the profile groove 104 in this embodiment, wherein the plastic-sprayed layer can be formed by spraying plastic powder onto the inner wall surface of the profile groove 104 by an electrostatic powder spraying method known in the art, and the inner wall surface of the profile groove 104 includes the groove wall and the groove bottom of the profile groove 104. Therefore, the embodiment can ensure the cleanness of the inner wall surface of the profile groove 104 based on the characteristic of small adhesion of the plastic spraying layer to scraps so as to meet the quality requirement of multiple times of flow collecting disc welding.
In addition, it should be noted that the indenter body 101 shown in the present embodiment is a metal shaping member, wherein the indenter body 101 may be specifically configured as a copper indenter.
Meanwhile, in order to realize the detachable connection between the indenter body 101 and the carrying component shown in the present embodiment, the indenter body 101 of the present embodiment is further provided with a mounting position 107, wherein the mounting position 107 may be a mounting hole position provided on one side or the opposite side of the indenter body 101; meanwhile, the carrying component can be a fixture for a fixed battery cell, one clamping end of the fixture can be abutted to one end of the battery cell, and the other clamping end of the fixture is provided with the pressure head body 101, so that the current collecting disc is clamped at the other end of the battery cell through the pressure head body 101.
As shown in fig. 10, the present embodiment further provides a current collecting plate welding method of the current collecting plate welding head 1 as described above, including: s1, clamping the current collecting disc between the pre-welding end of the battery cell and the pressure head body; and S2, adjusting the space coordinate of the spot welding machine, controlling the gun head of the spot welding machine to extend to the joint of the collecting disc and the edge of the tool hole, and performing successive spot welding on the collecting disc by taking the edge of the tool hole as a welding path.
Specifically, in this embodiment, when clamping the current collecting tray in S1, a clamping mechanism 2 as shown in fig. 11 may be adopted, where the clamping mechanism 2 is mounted on the fixed base 3, one clamping end of the clamping mechanism 2 is used for clamping one end of the battery cell 5, the other clamping end of the clamping mechanism 2 is formed as a welding pressure plate 24 used for clamping the other end of the battery cell 5, and the current collecting tray welding pressure head 1 shown in the above embodiment is mounted on the welding pressure plate 24.
Specifically, the clamping mechanism 2 shown in this embodiment further includes a first telescopic driving mechanism 21 and a second telescopic driving mechanism 23, one of the clamping ends of the clamping mechanism 2 is formed into a positioning head 22, the positioning head 22 is used for coaxially abutting against one end of the battery cell 5, the telescopic end of the first telescopic driving mechanism 21 is connected to the positioning head 22, the telescopic end of the second telescopic driving mechanism 23 is connected to a welding pressing plate 24, and when the collecting tray welding pressing head 1 shown in the above embodiment is mounted on the welding pressing plate 24, the collecting tray 6 can be clamped between the other end of the battery cell 5 and the collecting tray welding pressing head 1.
Meanwhile, in the embodiment, when the collector plate is welded in S2, the welding moving mechanism 7 shown in fig. 13 may be adopted, where the welding moving mechanism 7 includes a first straight line module 71, a second straight line module 72, and a third straight line module 73, and a sliding table of the first straight line module 71 is configured to move in the X-axis direction; the second linear module 72 is mounted on the sliding table of the first linear module 71, and the sliding table of the second linear module 72 is used for moving along the Y-axis direction; the third linear module 73 is installed on the sliding table of the second linear module 72, and the sliding table of the third linear module 73 is used for moving along the Z-axis direction, wherein the X-axis, the Y-axis and the Z-axis are perpendicular to each other, the spot welding machine 9 shown in this embodiment is installed on the sliding table of the third linear module 73, so that the spatial position of the corresponding gun head of the spot welding machine 9 can be adjusted for the first time based on the welding moving mechanism 7, so that the gun head of the spot welding machine 9 reaches the preset spatial coordinate position.
In addition, the gun head of the spot welding machine 9 shown in this embodiment is installed on the sliding table of the third linear module 73 through the adjusting base 8, wherein the adjusting base 8 includes a hoisting frame, a turning mechanism and a telescopic adjusting mechanism, the upper end of the hoisting frame is installed on the sliding table of the third linear module 73, the turning mechanism is installed at the lower end of the hoisting frame, the telescopic adjusting mechanism is installed on the turning mechanism, and the gun head of the spot welding machine 9 is installed at the output end of the telescopic adjusting mechanism. Therefore, when spot welding is carried out specifically, the gun heads corresponding to the spot welding machines 9 can be adjusted for the second time through the adjusting bases 8, the inclination angles of the gun heads relative to the current collecting disc can be adjusted based on the turnover mechanisms, the distance between the gun heads and the prewelding points is further adjusted through the telescopic adjusting mechanisms, and the prewelding points are located at the joint portions of the current collecting disc and the edge of the tool hole.
Therefore, in the embodiment, when the current collecting disc is subjected to spot welding, the gun head of the spot welding machine 9 can be controlled to move gradually along the welding path based on the welding moving mechanism 7 and the adjusting base 8, so that successive spot welding on the current collecting disc is realized. When welding operation is carried out, the chamfer section 103 provides a sufficient movable area for the gun head of the spot welding machine 9, so that the gun head of the spot welding machine 9 can be controlled to extend to a joint part of the current collecting disc and the edge of the tool hole 102, the edge of the tool hole 102 is used as a welding path, spot welding is carried out on the current collecting disc, the current collecting disc and the pressure head body 101 are effectively prevented from being welded into a whole, the effective welding area for welding the current collecting disc is ensured, the stability of a welding point and the uniformity and stability of battery flow guiding are improved, and better welding quality is achieved.
It should be noted that, in the present embodiment, when the current collecting plate is welded, the spot welding machine shown in the above embodiment may be embodied as a laser spot welding machine.
As shown in fig. 12, since the welding pressure plate 24 is made of metal, the collector plate welding pressure head 1 of the present embodiment is detachably mounted on the welding pressure plate 24, and in order to ensure welding quality and prevent the welding quality of the collector plate from being affected by overheating of the temperature of the collector plate welding pressure head 1, a temperature sensor may be mounted on the welding pressure plate 24 to monitor the temperature of the pressure head body in real time when the collector plate welding is performed.
Meanwhile, a cooling device may be mounted on the welding platen 24, the cooling device may be a cooling plate 4 as shown in fig. 11 and 12, a cooling channel is formed in the cooling plate 4, cooling water is introduced into the cooling channel, control valves are mounted at two ends of the cooling channel, wherein the control valves may be flow regulating valves or pressure regulating valves known in the art, and the temperature sensor is in communication connection with the control valves through a control module. From this, control module can be according to the temperature data on the welding clamp plate 24 that temperature sensor monitored, carries out real time control to flow control valve or pressure regulating valve's aperture to adjust the cold volume of cooling plate 4 output, thereby based on the heat conduction effect of cooling plate 4, the temperature of control pressure head body 101 maintains in presetting the threshold interval.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A collector plate weld ram, comprising:
the pressure head comprises a pressure head body, a pressure head body and a pressure head cover, wherein the pressure head body is provided with an attaching surface used for being attached to a current collecting disc and a welding surface corresponding to the attaching surface, and the welding surface is provided with a tool hole penetrating towards the attaching surface; and the number of the first and second groups,
the tool hole comprises a vertical section and a chamfer section, one end of the vertical section is formed on the attaching surface, the other end of the vertical section is connected with one end of the chamfer section, the chamfer sections are circumferentially arranged along the edge of the tool hole, and the other end of the chamfer section is formed on the welding surface;
welding paths on the current collecting disc are distributed along the edge of the tool hole; the chamfering section is used for providing a movable area for a gun head of the spot welding machine, the vertical section is used for preventing the current collecting disc from being welded with the pressure head body into a whole, the pressure head body is further provided with a positioning hole, and the plurality of tool holes are distributed in central symmetry relative to the positioning hole;
further comprising: the positioning structure is formed on the attaching surface and circumferentially surrounds the outer side of the tool hole so as to position the end part of the battery cell pre-welded with the current collecting disc;
the positioning structure is a contour groove, a relief notch is formed in the wall of the contour groove, the shape of the notch of the contour groove is matched with the end part of the battery core, and the tooling hole is formed in the bottom of the contour groove; the groove wall of the profiling groove is gradually expanded from the groove bottom to the attached surface; and/or annular positioning grooves distributed along the groove wall are formed at the bottom of the profiling groove.
2. The collector plate welding head of claim 1, wherein the shape of the chamfered section comprises a beveled chamfer or a rounded chamfer.
3. The collector plate welding ram of claim 1, wherein the tooling hole has a shape that includes any one of a circle, a sector, a straight line, and a bent shape; and/or the tool holes comprise a plurality of holes and are circumferentially arranged relative to the disk center of the current collecting disk.
4. The collector plate welding head of claim 1 wherein the contoured groove has an inner wall surface with a plastic sprayed layer.
5. A collector plate welding ram according to any one of claims 1 to 3, wherein said ram body is a metal form; and/or the pressure head body is also provided with an installation position.
6. A collector plate welding method using the collector plate welding ram according to any one of claims 1 to 5, comprising:
s1, clamping the current collecting disc between the pre-welding end of the battery cell and the pressure head body;
and S2, adjusting the space coordinate of the spot welding machine, controlling the gun head of the spot welding machine to extend to the joint of the collecting disc and the edge of the tool hole, and performing successive spot welding on the collecting disc by taking the edge of the tool hole as a welding path.
7. The manifold plate welding method according to claim 6, wherein S2 further comprises: welding the current collecting plate by using a laser spot welding machine;
and/or monitoring the temperature of the pressure head body in real time during welding of the current collecting disc, and controlling the temperature of the pressure head body to be maintained within a preset threshold interval by adopting a cooling device.
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| CN103551774B (en) * | 2013-09-10 | 2015-06-10 | 深圳市今朝时代新能源技术有限公司 | Current collecting piece welding device, lower current collecting piece welding device and fixture of lower current collecting piece welding device |
| JP2015144095A (en) * | 2014-01-31 | 2015-08-06 | トヨタ自動車株式会社 | Secondary battery manufacturing method |
| CN207414607U (en) * | 2017-09-19 | 2018-05-29 | 江苏集盛星泰新能源科技有限公司 | A kind of current collector of super capacitor and cover fixture for laser welding |
| FR3079765B1 (en) * | 2018-04-04 | 2021-11-26 | Commissariat Energie Atomique | METHOD AND DEVICE FOR LASER WELDING OF A FIRST PART ON A SECOND PART |
| CN108890129B (en) * | 2018-08-02 | 2021-01-01 | 合肥国轩高科动力能源有限公司 | Semi-automatic welding machine for cylindrical battery core and current collecting disc |
| CN110394552A (en) * | 2019-08-29 | 2019-11-01 | 武汉逸飞激光设备有限公司 | Current collecting plates welder |
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Denomination of invention: A welding pressure head and welding method for a collecting plate Effective date of registration: 20231020 Granted publication date: 20210219 Pledgee: Wuhan Pacific Bank of Communications Co.,Ltd. Pledgor: Wuhan Yifei laser Co.,Ltd. Registration number: Y2023980061978 |