CN112496543A - Collector plate welding method and device - Google Patents
Collector plate welding method and device Download PDFInfo
- Publication number
- CN112496543A CN112496543A CN202011350193.5A CN202011350193A CN112496543A CN 112496543 A CN112496543 A CN 112496543A CN 202011350193 A CN202011350193 A CN 202011350193A CN 112496543 A CN112496543 A CN 112496543A
- Authority
- CN
- China
- Prior art keywords
- welding
- current collecting
- path
- collecting disc
- moving mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 391
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims description 72
- 230000008569 process Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000013519 translation Methods 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The embodiment of the invention provides a current collecting plate welding method and a device, wherein the current collecting plate welding method comprises the following steps: s1, clamping the current collecting disc between the pre-welding end of the battery cell and the welding pressure head; s2, setting a welding path of the welding gun head according to the arrangement shape of the welding grooves on the current collecting disc, adjusting the welding angle and the welding distance of the welding gun head relative to the current collecting disc, and controlling the welding gun head to perform spot welding on the current collecting disc successively along the welding path at preset intervals; under the condition of effectively protecting the welding gun head, the welding path can be adaptively arranged according to the arrangement form of the welding grooves on the current collecting disc, the difficulty of the welding operation of the current collecting disc is greatly simplified, and the welding quality of the current collecting disc is ensured.
Description
Technical Field
The invention relates to the technical field of lithium ion battery processing, in particular to a current collecting plate welding method and device.
Background
A lithium ion battery is a type of rechargeable battery that mainly relies on the movement of lithium ions between a positive electrode and a negative electrode to operate. Compared with other types of batteries such as lead-acid batteries, cadmium-nickel batteries and the like, the lithium ion battery has the advantages of large specific capacity, high working voltage, high charging speed, wide working temperature range, long cycle life, small volume, light weight and the like, thereby being widely applied to the fields of mobile communication terminals, electric driving tools, medical appliances, navigation, aerospace and the like.
At present, the cylindrical battery which is processed by adopting a winding type manufacturing process is applied to a lithium ion battery which is relatively wide, a positive current collector is formed at the positive end of a corresponding battery core of the cylindrical battery, and a negative current collector is formed at the negative end of the corresponding battery core of the cylindrical battery. In order to stably guide the current of the positive end and the negative end of the battery core out of the battery unit, current collecting discs are welded on the end surfaces of the positive current collector and the negative current collector. In order to facilitate welding of the current collecting plate, a welding groove is generally arranged on the current collecting plate, the welding groove is in a U shape, and the bottom surface of the welding groove is used as a welding area of a laser spot welding machine. Although the current collecting plate can be firmly welded on the end face of the battery cell, the arrangement form of the welding grooves on the current collecting plate is unreasonable in design, and the welding area of the current collecting plate is difficult to radiate to the periphery of the battery cell, so that a good flow guiding effect is difficult to achieve on the battery cell, and the internal resistance of the battery cell is high and the heat generation is serious.
Meanwhile, when the current collecting disc is welded, the laser spot welding machine is arranged on the welding moving mechanism, the space coordinate of the corresponding welding gun head of the laser spot welding machine is controlled through the welding moving mechanism, and the laser spot welding machine walks along a preset welding path to perform successive spot welding on the collecting disc. However, in an actual welding process, in order to ensure the welding quality of the current collecting disc, a welding pressure head is required to be pressed on the current collecting disc, and a tool hole corresponding to a welding area on the current collecting disc is required to be formed in the welding pressure head. However, the movable region of the welding tip is limited to the region where the tooling hole is located, and it is difficult to finely adjust the welding angle of the welding tip and the welding distance from the current collecting plate only by the welding moving mechanism, and the welding tip is easily damaged, and the welding quality of the current collecting plate is affected.
Disclosure of Invention
The embodiment of the invention provides a collector plate welding method and device, which are used for solving the problems that the existing collector plate welding method is difficult to finely adjust the welding angle and the welding distance of a welding gun head, the welding gun head is easy to be damaged, and the welding quality of the collector plate is influenced.
The embodiment of the invention provides a collector plate welding method, which comprises the following steps: s1, clamping the current collecting disc between the pre-welding end of the battery cell and the welding pressure head; s2, setting a welding path of the welding gun head according to the arrangement shape of the welding grooves on the current collecting disc, adjusting the welding angle and the welding distance of the welding gun head relative to the current collecting disc, and controlling the welding gun head to perform spot welding on the current collecting disc successively along the welding path at preset intervals; wherein, the welding path is determined according to the arrangement form of the welding grooves on the current collecting plate.
According to the welding method of the current collecting plate, in S2, the controlling of the welding gun head performs successive spot welding on the current collecting plate along the welding path at preset intervals, and the welding method further includes: and under the condition that the welding paths are arranged side by side, controlling the welding gun head to walk to the tail end along the head end of one welding path and then walk to the head end along the tail end of the other adjacent welding path, so that the operation is a cycle operation, and carrying out spot welding on the current collecting disc successively according to the operation.
According to the collector plate welding method provided by the embodiment of the invention, in the spot welding process of the collector plate, the pulse energy, the pulse frequency, the welding pulse width, the pulse time, the output power and the defocusing amount of laser output by a laser connected with the welding gun head are controlled, and the number of welding spots and the diameter of the welding spots of the welding gun head which successively performs spot welding along the welding path are controlled.
An embodiment of the present invention further provides a current collecting plate welding apparatus according to the current collecting plate welding method described above, including: the welding device comprises a clamping mechanism, a welding moving mechanism and an adjusting base; one clamping end of the clamping mechanism is used for clamping one end of the battery cell, and the other clamping end of the clamping mechanism is formed into a welding pressure head for clamping a current collecting disc between the other end of the battery cell and the welding pressure head; the welding moving mechanism is in communication connection with a control system, the control system is used for receiving a welding path input by a user, and the welding path is determined according to the arrangement form of the welding grooves on the current collecting disc; the adjusting base comprises a first support, a second support and a linear moving mechanism, the first support is connected with an execution end of the welding moving mechanism, the second support is rotatably installed on the first support, the linear moving mechanism is installed on the second support, and a driving end of the linear moving mechanism is used for installing a welding gun head of the laser spot welding machine.
According to the collector plate welding device provided by the embodiment of the invention, the moving direction of the driving end of the linear moving mechanism is vertical to the rotating center of the second bracket, and a plurality of linear moving mechanisms are arranged on the second bracket side by side; and/or, the linear moving mechanism comprises a single-shaft translation table, and the welding moving mechanism comprises a three-shaft mechanical arm.
According to one embodiment of the invention, the collector plate comprises a plate body, the plate body is provided with a first plate surface facing the battery core and a second plate surface facing away from the battery core, the first plate surface is provided with a welding groove sinking towards the second plate surface, and at least one section of the welding groove is used for being arranged along the radial direction of the battery core.
According to an embodiment of the collector plate welding device of the present invention, the shape of the welding groove includes any one of a strip shape, a bent shape, a fan ring shape, and a triangular shape.
According to one embodiment of the invention, the plurality of welding grooves are circumferentially arranged along the axis of the battery core, and the welding grooves on the tray body comprise at least one combination of the strip shape, the bent shape, the fan-shaped ring shape and the triangle shape.
According to the current collecting plate welding device provided by the embodiment of the invention, the welding groove is in a circular ring shape and is arranged coaxially with the battery core.
According to the current collecting plate welding device provided by the embodiment of the invention, the plate body is provided with a through hole used for corresponding to the axis of the battery core; or, the current collecting disc also comprises a tail body, and one end of the tail body is connected with the disc body.
According to the collector plate welding method and device provided by the embodiment of the invention, the collector plate can be clamped between the pre-welding end of the battery cell and the welding pressure head through the clamping mechanism, the welding path is set through the control system in communication connection with the welding moving mechanism, meanwhile, the fine adjustment of the welding angle and the welding distance of the welding gun head relative to the collector plate is carried out through the adjusting base arranged at the execution end of the welding moving mechanism, and then the welding gun head is controlled to carry out spot welding on the collector plate successively along the welding path at preset intervals, so that the welding path can be set according to the arrangement form of the welding grooves on the collector plate under the condition of forming effective protection on the welding gun head, the difficulty of the welding operation of the collector plate is greatly simplified, and the welding quality of the collector plate is ensured.
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 schematic structural view of a first type of a current collecting plate according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a second type of current collecting plate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third type of current collecting plate according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fourth embodiment of a current collecting plate according to the present invention;
FIG. 5 is a schematic structural diagram of a fifth embodiment of a current collecting plate according to the present invention;
FIG. 6 is a schematic structural diagram of a sixth type of current collecting plate according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a clamping mechanism in a welding device according to an embodiment of the present invention;
fig. 8 is a schematic view of a mounting structure of an adjusting base on a welding moving mechanism in the welding device provided by the embodiment of the invention;
FIG. 9 is a schematic view of a first view of an adjustment base of a welding apparatus according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram illustrating a second view angle of an adjusting base in the welding device according to the embodiment of the present invention;
fig. 11 is a flowchart of a welding method based on a welding device according to an embodiment of the present invention.
In the figure, 1, a current collecting disc; 11. a tray body; 110. welding a groove; 111. a through hole; 12. a tail body; 2. a clamping mechanism; 21. a first telescopic driving mechanism; 22. positioning the head; 23. a second telescopic driving mechanism; 24. welding a pressure head; 3. a welding moving mechanism; 31. a first linear module; 32. a second linear module; 33. a third linear module; 4. an adjusting base; 41. a first bracket; 410. an installation position; 411. a cantilever; 42. a second bracket; 43. a linear movement mechanism; 44. rotating the disc; 5. welding the gun head; 6. and (5) battery cores.
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 6, the present embodiment provides a current collecting plate 1 including: disk body 11, disk body 11 have and are used for facing to the first quotation of electric core and the second quotation of electric core dorsad, are formed with the sunken welding groove 110 of orientation second quotation on the first quotation, and at least one section on the welding groove 110 is used for radially arranging along electric core.
Specifically, this embodiment is through setting up welding groove 110 on the disk body 11 at current collecting tray 1, the tank bottom surface of accessible welding groove 110 and the tip in close contact with of electric core, and through radially arranging at least one section along electric core with on the welding groove 110, make the welding area that corresponds electric core on current collecting tray 1 except can distributing in the middle part area of electric core tip, can also reach the peripheral region of electric core tip, so, both ensured current collecting tray 1's welding quality, make current collecting tray 1 reach better water conservancy diversion effect to electric core again, can effectively reduce the internal resistance of electric core.
It should be noted that the shape of the welding groove 110 includes any one of a strip shape, a bent shape, a fan ring shape and a triangular shape, and may not be particularly limited herein; at least one segment of the welding groove 110 shown in the embodiment is configured to be arranged along the radial direction of the battery cell, it is understood that, in the case that the shape of the welding groove 110 is a single regular shape, the regular shape may be a strip shape, a bent shape, a fan-ring shape or a triangular shape, which are well known in the art, where the overall structure of the welding groove 110 may be arranged along the radial direction of the battery cell, and in the case that the shape of the welding groove 110 is an irregular shape, for example, the irregular shape may be a combination of a strip shape and a fan shape, a combination of a strip shape and a triangular shape, a combination of a plurality of strips, a combination of a plurality of bent shapes, a combination of a plurality of triangular shapes, or the like, where only a unit structure of a certain segment of the combination may be arranged along the radial direction of the battery cell, so that a welding region corresponding to the end portion of the battery cell on the current collecting tray 1 can, thereby ensuring the flow guiding effect of the collecting tray 1.
Preferably, the welding grooves 110 shown in this embodiment include a plurality of welding grooves 110, and are arranged along the axis of the battery cell in a circumferential manner, and the welding grooves 110 on the tray body 11 include a combination of at least one of the strip shape, the bent shape, the fan-shaped annular shape, and the triangular shape shown in the above embodiments.
As shown in fig. 1, the welding groove 110 shown in this embodiment is "V" shaped, so that the welding groove 110 is formed by two groove segments, each of the groove segments is arranged along the radial direction of the battery cell, and two welding grooves 110 are specifically arranged on the tray body 11, and the two welding grooves 110 are centrally and symmetrically distributed by 180 ° relative to the axis of the battery cell, that is, are circumferentially arranged along the axis of the battery cell.
As shown in fig. 2, the welding groove 110 shown in this embodiment is in a strip shape and is arranged along the radial direction of the battery cell; meanwhile, the number of the welding grooves 110 is three, and the welding grooves are circumferentially and uniformly distributed along the axis of the battery cell.
As shown in fig. 3, the welding grooves 110 shown in this embodiment are fan-shaped and arranged along the radial direction of the battery cell; meanwhile, the number of the welding grooves 110 is three, and the welding grooves are circumferentially and uniformly distributed along the axis of the battery cell.
As shown in fig. 4, the welding grooves 110 shown in this embodiment are rectangular and arranged along the radial direction of the battery cell; meanwhile, the number of the welding grooves 110 is three, and the welding grooves are circumferentially and uniformly distributed along the axis of the battery cell.
As shown in fig. 5, the welding slot 110 shown in this embodiment is of a starfish-shaped structure, and has six slot segments uniformly distributed along the circumference, and each slot segment is of a long strip shape and is arranged along the radial direction of the battery cell. The current collector plate 1 of the present exemplary embodiment shown in fig. 5 is also suitable for conducting current to the capacitor ends.
It should be noted that the disc body 11 of the current collecting disc 1 shown in the present embodiment is coaxially distributed with the axis of the battery cell, and the groove bottom surface of the welding groove 110 is a welding area for performing laser spot welding on the current collecting disc 1.
Meanwhile, as shown in fig. 6, the welding groove 110 shown in this embodiment is circular and is configured to be coaxial with the battery cell, so that the welding groove 110 not only ensures radial configuration of the battery cell, but also increases the effective welding area of the current collecting plate 1 at the end of the battery cell.
As shown in fig. 1 to 6, in order to discharge heat during the welding process of the current collecting plate 1 and perform a liquid injection operation on the battery cell during the assembly process of the lithium ion battery, a through hole 111 corresponding to the axial center of the battery cell is formed on the plate body 11 shown in this embodiment.
As shown in fig. 1 to 4 and 6, the present embodiment further includes a tail body 12, and one end of the tail body 12 is connected to the tray 11. One end of the tail body 12 and the edge of the tray body 11 can be welded into a whole, the tail body 12 and the tray body 11 can also be arranged into an integrated structure, and the other end of the tail body 12 is provided with a mounting hole for mounting a shell cover of a lithium ion battery.
As shown in fig. 7 to 10, the present embodiment also provides a current collecting plate welding apparatus for welding the current collecting plate as described above, including: the welding device comprises a clamping mechanism 2, a welding moving mechanism 3 and an adjusting base 4; one clamping end of the clamping mechanism 2 is used for clamping one end of the battery core 6, and the other clamping end is formed as a welding pressure head 24, so that the current collecting plate 1 shown in the above embodiment is clamped between the other end of the battery core 6 and the welding pressure head 24; the adjusting base 4 comprises a first support 41, a second support 42 and a linear moving mechanism 43, the first support 41 is connected with an execution end of the welding moving mechanism 3, the second support 42 is rotatably installed on the first support 41, the linear moving mechanism 43 is installed on the second support 42, and a driving end of the linear moving mechanism 43 is used for installing a welding gun head 5 of the laser spot welding machine.
Specifically, in this embodiment, the current collecting disc 1 can be clamped between the pre-welding end of the electric core 6 and the welding pressure head 24 through the clamping mechanism 2, a welding path corresponding to the shape of the welding groove on the current collecting disc is set through the welding moving mechanism 3, fine tuning is performed on the welding angle and the welding distance of the welding gun head 5 relative to the current collecting disc through the adjusting base 4, and then the welding gun head 5 is controlled to perform spot welding on the current collecting disc successively along the welding path at preset intervals, so that the welding path can be set according to the arrangement form of the welding groove on the current collecting disc under the condition that effective protection is formed on the welding gun head 5, the difficulty of welding operation of the current collecting disc is greatly simplified, and the welding quality of the current collecting disc is ensured.
As shown in fig. 7, 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 as a positioning head 22, the positioning head 22 is used for coaxially abutting against one end of the battery cell 6, the telescopic end of the first telescopic driving mechanism 21 is connected to the positioning head 22, and the telescopic end of the second telescopic driving mechanism 23 is connected to the welding ram 24.
Meanwhile, as shown in fig. 8, the welding moving mechanism 3 shown in this embodiment may be a three-axis robot, and includes a first linear module 31, a second linear module 32, and a third linear module 33, where a sliding table of the first linear module 31 is configured to move along the X-axis direction; the second linear module 32 is mounted on the sliding table of the first linear module 31, and the sliding table of the second linear module 32 is used for moving along the Y-axis direction; the third linear module 33 is mounted on the slide table of the second linear module 32, and the slide table of the third linear module 33 is adapted to move in the Z-axis direction, wherein the X-axis, the Y-axis and the Z-axis are perpendicular to each other, the adjusting base 4 shown in this embodiment is installed on the sliding table of the third linear module 33, thus, the welding path for welding the current collecting plate can be set through the control system which is in communication connection with the welding moving mechanism 3, the welding path is determined according to the arrangement form of the welding grooves on the current collecting plate, so that when the current collecting plate is welded, the spatial coordinates of the welding torch head 5 of the laser spot welder can be adjusted based on the first straight line module 31, the second straight line module 32 and the third straight line module 33, and the spatial coordinates are arranged along a preset welding path, thereby ensuring that the welding torch head 5 travels along the welding path and performs spot welding work on the current collecting plate.
In addition, as shown in fig. 9 to 10, since the first bracket 41 on the adjusting base 4 is mounted at the executing end of the welding moving mechanism 3, and the welding gun head 5 of the laser spot welding machine is mounted at the driving end of the linear moving mechanism 43 on the adjusting base 4, the welding gun head 5 of the laser spot welding machine can be preliminarily positioned by the welding moving mechanism 3, the welding angle of the welding gun head 5 relative to the current collecting plate is adjusted by the second bracket 42 on the adjusting base 4, and the position of the welding gun head 5 away from the prewelding point on the current collecting plate is further adjusted based on the linear moving mechanism 43, so that the fine adjustment of the welding angle and the welding distance of the welding gun head 5 relative to the current collecting plate is realized.
Specifically, in the embodiment, the upper end of the first bracket 41 is provided with the mounting position 410, the lower end of the first bracket 41 is provided with two suspension arms 411, the second bracket 42 is rotatably mounted between the two suspension arms 411, the rotation center of the second bracket 42 is perpendicular to the suspension arms 411, the suspension arms 411 are connected with the first plate surface of the rotating disc 44, and the second plate surface of the rotating disc 44 corresponds to the first plate surface thereof and is connected with the second bracket 42.
As shown in fig. 9 to 10, in order to facilitate adjustment of the welding angle of the welding torch head 5, the driving end of the linear movement mechanism 43 shown in this embodiment moves in a direction perpendicular to the rotation center of the second support 42, and a plurality of linear movement mechanisms 43 are mounted on the second support 42 side by side; thus, in the present embodiment, the welding inclination angles of the welding tips 5 mounted on the plurality of linear movement mechanisms 43 may be adjusted at a time based on the second support 42, and then the welding distances of the respective welding tips 5 with respect to the current collecting plate may be adjusted accordingly based on the respective linear movement mechanisms 43.
It should be noted here that, in order to achieve a fine adjustment of the welding distance of the welding torch head 5 relative to the collecting tray, the linear movement mechanism 43 shown in this embodiment is preferably a single-axis translation stage known in the art, which can quantitatively adjust the distance of movement of the torch head by means of a hand-held micrometer rod.
As shown in fig. 11, the present embodiment further provides a welding method of the collector plate welding apparatus, including: s1, clamping the current collecting disc between the pre-welding end of the battery cell and the welding pressure head; s2, setting a welding path of the welding gun head according to the arrangement shape of the welding grooves on the current collecting disc, adjusting the welding angle and the welding distance of the welding gun head relative to the current collecting disc, and controlling the welding gun head to perform spot welding on the current collecting disc successively along the welding path at preset intervals; wherein, the welding path is determined according to the arrangement form of the welding grooves on the current collecting plate.
Specifically, when the current collecting plate shown in the above embodiment is welded, the following operations are referred to:
firstly, a positioning head on a clamping mechanism shown in the embodiment is coaxially abutted against one end of an electric core, and a pre-welded current collecting disc is clamped between the other end of the electric core (the pre-welded end of the electric core) and a welding pressure head on the clamping mechanism, wherein a tool hole corresponding to a welding groove on the current collecting disc is formed in the welding pressure head, so that the welding gun head can carry out laser spot welding on a corresponding area on the current collecting disc under the guidance of the tool hole; meanwhile, a plurality of groups of positioning heads and welding pressure heads which are arranged in a one-to-one correspondence mode can be arranged on the clamping mechanism, so that the plurality of battery cells can be clamped and fixed at the same time, and the pre-welding ends of the plurality of battery cells can be subjected to current collecting disc welding operation at the same time.
And secondly, setting a welding path of a welding gun head of the laser spot welding machine through a control system, such as a touch screen controller or a computer end, which is in communication connection with the welding moving mechanism, wherein the welding path is determined according to the arrangement form of the welding grooves on the current collecting disc.
As shown in fig. 1, in the case where the welding groove 110 has a "V" shape, the welding groove 110 includes two groove sections, and two welding paths arranged along a long side of each groove section are provided side by side on a groove bottom surface of each groove section.
As shown in fig. 2, in the case where the welding groove 110 has a long shape, a welding path arranged along a long side thereof is provided on the groove bottom surface of the welding groove 110.
As shown in fig. 3 to 4, in the case that the welding groove 110 has a fan shape or a rectangular shape, a plurality of welding paths are provided on the groove bottom surface of the welding groove 110, the plurality of welding paths are formed in an array shape, and each welding path is radially arranged on the current collecting plate.
In the case of a starfish-like configuration of the welding bowl 110, as shown in fig. 5, a welding path is provided on the bottom surface of the corresponding bowl of each bowl segment of the welding bowl 110, and it is apparent that each welding path is arranged radially on the collecting tray along the bowl segment corresponding thereto.
As shown in fig. 6, when the welding groove 110 has a circular ring shape, a plurality of circular ring-shaped welding paths are provided on the bottom surface of the welding groove 110, and the plurality of welding paths are arranged concentrically.
Meanwhile, the welding angle and the welding distance of the welding gun head relative to the current collecting disc are adjusted through the adjusting base arranged at the executing end of the welding moving mechanism. Under the condition that a plurality of groups of positioning heads and welding pressure heads which are arranged in one-to-one correspondence are arranged on the clamping mechanism, a plurality of welding gun heads can be simultaneously installed on the adjusting base, and the welding angles and the welding distances of the welding gun heads relative to the corresponding current collecting discs are simultaneously adjusted by the adjusting base.
And then, controlling the welding gun head to perform spot welding on the current collecting disc successively at preset intervals along a welding path, wherein the specific operation is as follows: and under the condition that the welding paths are arranged side by side, controlling the welding gun head to walk to the tail end along the head end of one welding path and then walk to the head end along the tail end of the other adjacent welding path, so that the operation is a cycle operation, and carrying out spot welding on the current collecting disc successively according to the operation. By optimally setting the welding path of the welding gun head, the spot welding operation of the current collecting disc can be simplified, and the welding gun head is ensured to finish the welding operation of each welding point corresponding to a welding area through the shortest walking path.
Meanwhile, in the process of spot welding of the current collecting plate, the pulse energy, the pulse frequency, the welding pulse width, the pulse time, the output power and the defocusing amount of laser output by a laser connected with the welding gun head are controlled, the number of welding spots and the diameter of the welding spots of the welding gun head which successively performs spot welding along a welding path are controlled, wherein the welding pulse width represents the duration time of welding the welding spots at a single time, the pulse time represents the interval time when two adjacent welding spots are welded, and the defocusing amount represents the vertical distance between the welding gun head and the welding spots. The laser welding method has the advantages that the laser parameters output by the laser are controlled, the number of welding spots and the diameter of the welding spots are controlled while the collector plate is subjected to spot welding at preset intervals, the problem of welding penetration or poor welding can be solved, and the diameter of the welding spots can be further controlled by controlling the peak power of the laser output by the laser to ensure the welding quality of the collector plate.
In addition, it should be noted that after the current collecting disc is welded, the current collecting disc can be subjected to tension test and visual detection so as to perform welding missing, welding penetration and welding deviation detection on the current collecting disc, and based on the detection result, the clamping state of the clamping mechanism on the current collecting disc can be adjusted, and the pulse frequency, pulse time, output power and defocusing amount of laser output by a laser can be adjusted so as to ensure the welding quality of the current collecting disc.
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 (10)
1. A method of welding a collector plate, comprising:
s1, clamping the current collecting disc between the pre-welding end of the battery cell and the welding pressure head;
s2, setting a welding path of the welding gun head according to the arrangement shape of the welding grooves on the current collecting disc, adjusting the welding angle and the welding distance of the welding gun head relative to the current collecting disc, and controlling the welding gun head to perform spot welding on the current collecting disc successively along the welding path at preset intervals;
wherein, the welding path is determined according to the arrangement form of the welding grooves on the current collecting plate.
2. The collecting plate welding method according to claim 1, wherein the controlling of the welding torch head to successively spot-weld the collecting plate along the welding path at a predetermined interval in S2 further comprises:
and under the condition that the welding paths are arranged side by side, controlling the welding gun head to walk to the tail end along the head end of one welding path and then walk to the head end along the tail end of the other adjacent welding path, so that the operation is a cycle operation, and carrying out spot welding on the current collecting disc successively according to the operation.
3. The collecting plate welding method according to claim 1 or 2, wherein the controlling of the welding torch head to successively spot-weld the collecting plate along the welding path at a predetermined interval in S2 further comprises:
and in the process of spot welding the current collecting plate, controlling the pulse energy, the pulse frequency, the welding pulse width, the pulse time, the output power and the defocusing amount of laser output by a laser connected with the welding gun head, and controlling the number of welding spots and the diameter of the welding spots of the welding gun head which successively performs spot welding along the welding path.
4. A collector plate welding apparatus according to the collector plate welding method of any one of claims 1 to 3, comprising: the welding device comprises a clamping mechanism, a welding moving mechanism and an adjusting base;
one clamping end of the clamping mechanism is used for clamping one end of the battery cell, and the other clamping end of the clamping mechanism is formed into a welding pressure head for clamping a current collecting disc between the other end of the battery cell and the welding pressure head;
the welding moving mechanism is in communication connection with a control system, the control system is used for receiving a welding path input by a user, and the welding path is determined according to the arrangement form of the welding grooves on the current collecting disc;
the adjusting base comprises a first support, a second support and a linear moving mechanism, the first support is connected with an execution end of the welding moving mechanism, the second support is rotatably installed on the first support, the linear moving mechanism is installed on the second support, and a driving end of the linear moving mechanism is used for installing a welding gun head of the laser spot welding machine.
5. The collector disc welding device according to claim 4, wherein the driving end of said linear moving mechanism moves in a direction perpendicular to the center of rotation of said second holder, said second holder having a plurality of said linear moving mechanisms mounted side by side;
and/or, the linear moving mechanism comprises a single-shaft translation table, and the welding moving mechanism comprises a three-shaft mechanical arm.
6. The collector tray welding device according to claim 4, wherein the collector tray comprises a tray body having a first tray surface facing the cell and a second tray surface facing away from the cell, the first tray surface having a welding groove formed thereon and sinking toward the second tray surface, at least one segment of the welding groove being arranged in a radial direction of the cell.
7. The collector plate welding device according to claim 6, wherein the shape of said welding groove comprises any one of a bar shape, a bent shape, a fan-ring shape, and a triangular shape.
8. The apparatus of claim 7, wherein the plurality of welding grooves are arranged along the axis of the battery cell in a circle, and the welding grooves on the tray body comprise a combination of at least one of the strip shape, the bent shape, the fan-shaped ring shape, and the triangular shape.
9. The manifold welding device according to claim 6, wherein said welding slot is annular in shape and is adapted to be arranged coaxially with said cell.
10. The current collecting plate welding device according to any one of claims 6 to 9, wherein a through hole for corresponding to an axis of the battery cell is formed in the plate body; or, the current collecting disc also comprises a tail body, and one end of the tail body is connected with the disc body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011350193.5A CN112496543A (en) | 2020-11-26 | 2020-11-26 | Collector plate welding method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011350193.5A CN112496543A (en) | 2020-11-26 | 2020-11-26 | Collector plate welding method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112496543A true CN112496543A (en) | 2021-03-16 |
Family
ID=74966277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011350193.5A Pending CN112496543A (en) | 2020-11-26 | 2020-11-26 | Collector plate welding method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112496543A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022242538A1 (en) * | 2021-05-21 | 2022-11-24 | 湖北亿纬动力有限公司 | Current collection plate and battery |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203674314U (en) * | 2013-12-24 | 2014-06-25 | 益阳科力远电池有限责任公司 | Current collecting device for circular battery |
| CN203817630U (en) * | 2014-05-06 | 2014-09-10 | 中山天贸电池有限公司 | Laser spot welding device of battery protecting plate |
| CN206241479U (en) * | 2016-12-25 | 2017-06-13 | 惠州市华沃科技有限公司 | Fixture for laser welding |
| CN108188603A (en) * | 2018-03-23 | 2018-06-22 | 江阴德龙激光能源设备有限公司 | For the pressing element of laser welding convergent belt |
| CN108274118A (en) * | 2018-01-31 | 2018-07-13 | 武汉逸飞激光设备有限公司 | A kind of current collecting plates welding equipment |
| CN109088037A (en) * | 2018-06-22 | 2018-12-25 | 合肥国轩高科动力能源有限公司 | Current collecting plate welding structure for cylindrical battery |
| CN208570816U (en) * | 2018-07-04 | 2019-03-01 | 苏州安靠电源有限公司 | Convenient for the column lithium ion end face weld battery of fluid injection |
| CN208781899U (en) * | 2018-08-25 | 2019-04-23 | 浙江谷神能源科技股份有限公司 | A kind of lithium ion battery notch Composite Set flow table |
| CN109807479A (en) * | 2017-11-21 | 2019-05-28 | 惠州市德瑞达科技股份有限公司 | A kind of Laser Welding positioning device and welding procedure |
| CN208992048U (en) * | 2018-09-20 | 2019-06-18 | 合肥国轩高科动力能源有限公司 | Cylinder lithium cell current collector dish positioning fixture device |
| CN209071491U (en) * | 2018-11-19 | 2019-07-05 | 国轩新能源（苏州）有限公司 | A kind of current collecting plates for the full tab lithium ion battery of cylinder |
| CN209993671U (en) * | 2019-05-20 | 2020-01-24 | 苏州安靠电源有限公司 | Current collecting plate, battery cap and battery |
| CN210073929U (en) * | 2019-06-21 | 2020-02-14 | 苏州安靠电源有限公司 | Battery block and cylindrical battery |
| CN210956828U (en) * | 2019-11-04 | 2020-07-07 | 横店集团东磁股份有限公司 | Lithium battery current collecting disc |
| CN211305143U (en) * | 2019-12-30 | 2020-08-21 | 江西佰特励电子科技有限公司 | Current collecting disc device for welding bottom of negative electrode |
-
2020
- 2020-11-26 CN CN202011350193.5A patent/CN112496543A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203674314U (en) * | 2013-12-24 | 2014-06-25 | 益阳科力远电池有限责任公司 | Current collecting device for circular battery |
| CN203817630U (en) * | 2014-05-06 | 2014-09-10 | 中山天贸电池有限公司 | Laser spot welding device of battery protecting plate |
| CN206241479U (en) * | 2016-12-25 | 2017-06-13 | 惠州市华沃科技有限公司 | Fixture for laser welding |
| CN109807479A (en) * | 2017-11-21 | 2019-05-28 | 惠州市德瑞达科技股份有限公司 | A kind of Laser Welding positioning device and welding procedure |
| CN108274118A (en) * | 2018-01-31 | 2018-07-13 | 武汉逸飞激光设备有限公司 | A kind of current collecting plates welding equipment |
| CN108188603A (en) * | 2018-03-23 | 2018-06-22 | 江阴德龙激光能源设备有限公司 | For the pressing element of laser welding convergent belt |
| CN109088037A (en) * | 2018-06-22 | 2018-12-25 | 合肥国轩高科动力能源有限公司 | Current collecting plate welding structure for cylindrical battery |
| CN208570816U (en) * | 2018-07-04 | 2019-03-01 | 苏州安靠电源有限公司 | Convenient for the column lithium ion end face weld battery of fluid injection |
| CN208781899U (en) * | 2018-08-25 | 2019-04-23 | 浙江谷神能源科技股份有限公司 | A kind of lithium ion battery notch Composite Set flow table |
| CN208992048U (en) * | 2018-09-20 | 2019-06-18 | 合肥国轩高科动力能源有限公司 | Cylinder lithium cell current collector dish positioning fixture device |
| CN209071491U (en) * | 2018-11-19 | 2019-07-05 | 国轩新能源（苏州）有限公司 | A kind of current collecting plates for the full tab lithium ion battery of cylinder |
| CN209993671U (en) * | 2019-05-20 | 2020-01-24 | 苏州安靠电源有限公司 | Current collecting plate, battery cap and battery |
| CN210073929U (en) * | 2019-06-21 | 2020-02-14 | 苏州安靠电源有限公司 | Battery block and cylindrical battery |
| CN210956828U (en) * | 2019-11-04 | 2020-07-07 | 横店集团东磁股份有限公司 | Lithium battery current collecting disc |
| CN211305143U (en) * | 2019-12-30 | 2020-08-21 | 江西佰特励电子科技有限公司 | Current collecting disc device for welding bottom of negative electrode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022242538A1 (en) * | 2021-05-21 | 2022-11-24 | 湖北亿纬动力有限公司 | Current collection plate and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102189328B (en) | Full-automatic ultrasonic welding machine for lithium ion battery cell multi-layer lug | |
| CN109877452B (en) | Welding method for metal bipolar plate of fuel cell | |
| CN112496543A (en) | Collector plate welding method and device | |
| CN103920962A (en) | Electronic element automatic welding equipment | |
| CN204271172U (en) | Contact pin spot welding machine rotating jig | |
| CN104722918A (en) | Nickel-base high energy battery electrode tab welding process | |
| CN103817447B (en) | A kind of sodium-sulphur battery laser weld Double-station clamp | |
| KR101763723B1 (en) | A ultrasonic welding apparatus | |
| US20210299801A1 (en) | Jig for tack welding of battery cell electrode lead | |
| CN206747765U (en) | Nut projection welding machine | |
| CN203371160U (en) | Argon tungsten-arc welding circumference automatic welding table | |
| CN216325771U (en) | Oil tank cassette spot welding device | |
| CN203712099U (en) | Double-station fixture for laser welding of sodium-sulphur batteries | |
| KR20030086830A (en) | A Automatic Soldering Unit | |
| CN219746767U (en) | Fixing jig for welding battery plates | |
| CN113182676B (en) | Welding assembly and welding method of battery adapter plate | |
| CN117583730B (en) | Welding equipment | |
| JP3162930B2 (en) | Battery terminal assembly equipment | |
| CN218311814U (en) | Welding device for cylindrical battery cathode current collecting disc | |
| CN221363503U (en) | Single-sided spot welder with turnover structure | |
| CN211438561U (en) | Robot friction stir spot welding system capable of accurately supporting welding spot position | |
| CN220388212U (en) | Positioning device for stud welding machine | |
| CN214518554U (en) | Three-dimensional welding positioner | |
| CN220782676U (en) | Lithium battery production tab cover plate welding equipment | |
| CN109290651A (en) | A kind of method of belt electrode migration processing round arrays slot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |