CN115502625A - Multi-point welding device and method for lithium battery electrode column - Google Patents
Multi-point welding device and method for lithium battery electrode column Download PDFInfo
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- CN115502625A CN115502625A CN202211373404.6A CN202211373404A CN115502625A CN 115502625 A CN115502625 A CN 115502625A CN 202211373404 A CN202211373404 A CN 202211373404A CN 115502625 A CN115502625 A CN 115502625A
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a multipoint welding device and a multipoint welding method for an electrode column of a lithium battery, and relates to the technical field of electrode welding of lithium batteries. In the invention: the top of nickel strip disposes along the fixed-position welding mechanism of nickel strip installation direction motion, and fixed-position welding mechanism bottom flank is provided with welding module, horizontal sensing module, is located the first vertical sensing module of welding module one side position, is located the vertical sensing module of second of welding module opposite side position. The transverse sensing module comprises a first transverse probe, a second transverse probe, a third transverse probe and a fourth transverse probe. The first longitudinal sensing module and the second longitudinal sensing module are respectively provided with a front probe, a rear probe, a first middle probe and a second middle probe. The invention realizes the multi-point staggered spot welding operation of the nickel sheet and the single lithium battery electrode, and avoids the 'circuitous' complex positioning and welding process of a welding mechanism compared with the mode of independently completing all spot welding of the single lithium battery one by one.
Description
Technical Field
The invention relates to the technical field of welding of lithium battery electrodes, in particular to a multi-point welding device and a multi-point welding method for a lithium battery electrode column.
Background
When the nickel strips are used for carrying out series-parallel connection welding on the lithium battery, in order to improve the welding firmness degree and avoid damage to the lithium battery electrode caused by excessive welding (not beneficial to secondary ladder utilization), the nickel strips are generally welded at the position of the lithium battery electrode by adopting a multi-point spot welding mode, namely four welding spots distributed in a staggered manner are spot-welded at the position where the nickel strips are connected with the lithium battery electrode, and the four welding spots are distributed at four corners of a parallelogram. At present, when the lithium battery is subjected to multipoint welding, the spot welding mechanism moves to the next lithium battery position for welding again after spot welding of a single lithium battery is completed each time. The existing welding heads are in a double-point type, when a single lithium battery is welded in a staggered and multi-point mode, spot welding operation is generally required twice, then the position of the next lithium battery is adjusted to be in a circuitous mode, and spot welding is generally carried out on the next lithium battery twice.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-point welding device and a welding method for a lithium battery electrode column, which realize multi-point staggered spot welding operation of a nickel sheet and a single lithium battery electrode, ensure the welding effect of the nickel sheet and the lithium battery electrode, and avoid the 'circuitous' type complex positioning and welding process of a welding mechanism compared with the mode of independently completing all spot welding of the single lithium battery one by one.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a multi-point welding device for lithium battery electrode columns, wherein a plurality of lithium battery arrays are arranged in the range of a positioning frame, nickel bars are arranged at the upper side of a lithium battery welding electrode, a plurality of groups of limiting convex plates are arranged at the opening position of the upper side of the positioning frame, the number of each group of limiting convex plates is two, and the side ends of the nickel bars arranged at the upper side of the lithium battery electrode are positioned between the two limiting convex plates in the same group.
The top of nickel strip disposes the fixed-position welding mechanism along the motion of nickel strip installation direction, and fixed-position welding mechanism base side is provided with welding module, horizontal sensing module, is located the first vertical sensing module of welding module one side position, is located the second vertical sensing module of welding module opposite side position. The welding module is configured to weld a first welding head and a second welding head at corresponding positions of nickel bars on the upper side of the lithium battery electrode. The transverse sensing module comprises a first transverse probe, a second transverse probe, a third transverse probe and a fourth transverse probe, wherein the first transverse probe is adjacent to the second transverse probe, and the third transverse probe is adjacent to the fourth transverse probe. The first longitudinal sensing module and the second longitudinal sensing module are respectively provided with a front position probe, a rear position probe, a first middle position probe and a second middle position probe, the first middle position probe and the second middle position probe are positioned between the front position probe and the rear position probe, and the first middle position probe and the second middle position probe are adjacent.
As a preferred technical scheme of the welding device in the invention: the first longitudinal sensing module and the second longitudinal sensing module are in the same structure which is axisymmetrical with respect to the central position of the positioning welding mechanism.
As a preferred technical scheme of the welding device in the invention: and if the distance between the first transverse probe and the fourth transverse probe is La and the width of the nickel strip is Lb, then Lb > La. The number of the welding modules for the single spot welding of the contact parts of the nickel strips and the lithium battery electrodes is two, two longitudinally distributed welding points are formed on the same nickel strip, the vertical distance between the two longitudinally distributed welding points is set to be Ld, and then Ld = Lb-La.
As a preferred technical scheme of the welding device in the invention: and if the vertical direction distance between the first middle position probe and the second middle position probe is Lc and the diameter size of the welding end face of the lithium battery electrode is D, lc is less than D.
As a preferred technical scheme of the welding device of the invention: the horizontal position of the limiting convex plate is higher than the horizontal position of the electrode end face on the upper side of the vertically placed lithium battery.
As a preferred technical scheme of the welding device in the invention: the transverse sensing module is vertically connected to the side end of the welding module, and the linear positions of a first welding head and a second welding head of the welding module are right opposite to the middle symmetrical axis of the transverse sensing module.
The invention provides a multipoint welding method for an electrode column of a lithium battery, which comprises the following steps:
(1) Transverse positioning of the nickel strip: (1) after the lithium batteries are placed in the positioning frame, nickel strips are placed on the upper sides of the electrodes of the lithium batteries in the same column, and the side ends of the nickel strips are clamped between the two limiting convex plates in the same group. (2) The positioning welding mechanism transversely enters the upper side area of the first nickel strip, the edge position of the nickel strip is detected by a first transverse probe and a second transverse probe in the transverse sensing module, and when the nickel strip is not detected by the first transverse probe and the nickel strip is detected by the second transverse probe, the transverse position positioning of the welding module is completed.
(2) Longitudinal welding position positioning: (1) the positioning welding mechanism moves along the current longitudinal position of the nickel bar, when a first middle probe and a second middle probe in the first longitudinal sensing module both detect the electrode end face on the upper side of the lithium battery and a front probe and a rear probe do not detect the electrode end face on the upper side of the lithium battery, the positioning welding mechanism stops moving, and the welding module performs spot welding on the current position of the nickel bar for one time. (2) And (4) continuously moving the positioning welding mechanism along the longitudinal position of the current nickel strip according to the mode in the step (1) until the welding is completed for a certain number of times, and stopping the spot welding of the nickel strip in the current direction. (3) And the positioning welding mechanism carries out one-time transverse movement until a third transverse probe of the transverse sensing module detects a nickel strip and a fourth transverse probe does not detect the nickel strip. (4) The positioning welding mechanism moves along the opposite direction of the previous longitudinal movement, when the first middle probe and the second middle probe in the second longitudinal sensing module both detect the electrode end face on the upper side of the lithium battery and the front probe and the rear probe do not detect the electrode end face on the upper side of the lithium battery, the positioning welding mechanism stops moving, and the welding module performs one-time spot welding on the current position of the nickel strip. (5) And (4) continuously moving the positioning welding mechanism along the longitudinal position of the current nickel strip according to the mode in the step (4) until the welding is completed for a certain number of times, and stopping the spot welding of the nickel strip in the current direction.
As a preferred technical scheme of the welding method in the invention: the positioning welding mechanism carries out the longitudinal movement in-process along the nickel strip, if first horizontal probe, the horizontal probe of second in the horizontal sensing module survey the nickel strip and take place lateral deviation or third horizontal probe, the horizontal probe of fourth survey the nickel strip and take place lateral deviation, the system judges that the nickel strip is placed and the appearance is unusual, carries out unusual warning.
As a preferred technical scheme of the welding method in the invention: after the positioning welding mechanism completes one positive and negative double-longitudinal spot welding on one nickel strip, the positioning welding mechanism moves transversely to the upper part of the side end of the nickel strip at the next position, and the positive and negative double-longitudinal spot welding is carried out on the nickel strip at the next position.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the nickel strips arranged on the upper sides of the lithium battery electrodes are transversely arranged and positioned through the transverse sensing module, the positions of the welding modules, which need to be subjected to spot welding, are detected and positioned through the first longitudinal sensing module and the second longitudinal sensing module which are mutually centrosymmetric, and the spot welding between the nickel strips and each lithium battery in the current column is completed along the respective longitudinal direction, so that the multi-point staggered spot welding operation of the nickel sheets and the single lithium battery electrodes is realized, and the welding effect of the nickel sheets and the lithium battery electrodes is ensured.
2. When the positioning welding mechanism is used for welding, the welding operation of one half of all the spot welding of all the lithium batteries in the current column is completed at one time along the same longitudinal direction, only one transverse movement is needed, and the welding operation of the other half of all the spot welding of all the lithium batteries in the current column is completed at one time along the other longitudinal direction.
Drawings
FIG. 1 is a schematic diagram of a welding type of a nickel bar and a lithium battery in a forward direction by a positioning welding mechanism according to the present invention.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
FIG. 3 is a schematic diagram of a positioning welding mechanism for performing a "reverse" welding type on a nickel bar and a lithium battery in the invention.
Fig. 4 is a partially enlarged view of a portion B in fig. 3.
FIG. 5 is a schematic structural view of a tack welding mechanism of the present invention.
Description of reference numerals:
1-a positioning frame, 101-a limit convex plate; 2-a lithium battery; 3-nickel bars, 301-soldered points, 302-pre-soldered points; 4-positioning welding mechanism, 401-welding module, 4011-first welding head, 4012-second welding head, 402-transverse sensing module, 4021-first transverse probe, 4022-second transverse probe, 4023-third transverse probe, 4024-fourth transverse probe, 403-first longitudinal sensing module, 404-second longitudinal sensing module, 405-front probe, 406-rear probe, 407-first middle probe and 408-second middle probe; w-the weld axis.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1 and 3, a plurality of lithium batteries 2 are disposed in a positioning frame 1, and the plurality of lithium batteries 2 are arranged in an array. Nickel strip 3 has been placed to 2 welding electrode upsides of lithium cell, positioning welding mechanism 4 is located the top of nickel strip 3, and positioning welding mechanism 4 removes and carries out spot welding to nickel strip 3 in corresponding position along the longitudinal direction that nickel strip 3 placed (positioning welding mechanism 4 is connected with the actuating mechanism that can carry out horizontal or longitudinal movement, and the mechanism or the device that can realize horizontal, longitudinal movement are very common in industrial production, design, no longer give unnecessary details in this application).
The plurality of groups of limiting convex plates 101 are positioned at the upper side opening positions of the positioning frame 1 (the number of the limiting convex plates 101 is two), and the positions of the limiting convex plates 101 are higher than the positions of the upper side electrode end faces of the vertically placed lithium batteries 2. When the nickel strip 3 is placed at the upper side position of the electrode of the lithium battery 2, the side end of the nickel strip 3 needs to be placed between the two limiting convex plates 101 in the same group.
Referring to fig. 2, the first transverse probe 4021 of the transverse sensor module 402 does not detect the nickel bar 3, but the second transverse probe 4022 detects the nickel bar 3, which indicates that the first welding head 4011 and the second welding head 4012 of the welding module 401 are already in the linear orientation of one of the longitudinal side welding points, and the spot welding can be performed as long as the first longitudinal sensor module 403 completes the positioning of the longitudinal position.
Referring to fig. 3, the number of spot welding performed by the welding module 401 on the contact portion of the nickel bar 3 and the electrode of the lithium battery 2 at a time is two (with reference to fig. 2 and 5, the welding module 401 is provided with a first welding head 4011 and a second welding head 4012), two longitudinally distributed welding points are formed on the same nickel bar 3 (as shown in fig. 3, a small circle of a solid line is a welded point 301, a small circle of a dotted line is a pre-welded point 302, and a spot welding moving direction of the welding module 401 is also identified in fig. 3), and if a vertical distance between the two longitudinally distributed welding points is Ld, ld = Lb-La, la is a distance between the first transverse probe 4021 and the fourth transverse probe 4024, and Lb is a width of the nickel bar 3.
Referring to fig. 3 and 4, after completing one longitudinal spot welding, the tack welding mechanism 4 performs a certain distance of transverse movement, and then performs another longitudinal spot welding in the opposite direction. The spacing La between the first transverse probe 4021 and the fourth transverse probe 4024 and the width Lb of the nickel bar 3 are related to each other: lb > La. The vertical direction distance Lc between the first middle position probe 407 and the second middle position probe 408 has a relationship with the diameter dimension D of the electrode welding end face of the lithium battery 2: lc < D.
Referring to fig. 5, a welding module 401, a transverse sensing module 402, a first longitudinal sensing module 403, and a second longitudinal sensing module 404 are disposed on a bottom side of the positioning and welding mechanism 4, the transverse sensing module 402 is vertically connected to a side end of the welding module 401, the first longitudinal sensing module 403 is located at a side of the welding module 401, and the second longitudinal sensing module 404 is located at another side of the welding module 401.
The transverse sensing module 402 is provided with a first transverse probe 4021, a second transverse probe 4022, a third transverse probe 4023 and a fourth transverse probe 4024, wherein the first transverse probe 4021 is adjacent to the second transverse probe 4022, and the third transverse probe 4023 is adjacent to the fourth transverse probe 4024.
The bonding module 401 has a first bonding head 4011 and a second bonding head 4012. The straight line positions of the first welding head 4011 and the second welding head 4012 of the welding module 401 are right opposite to the middle symmetry axis of the transverse sensing module 402 (the first welding head 4011 and the second welding head 4012 of the welding module 401 are located on the welding axis W, and the middle symmetry axis of the transverse sensing module 402 and the welding axis W are in the same vertical plane).
The first longitudinal sensing module 403 and the second longitudinal sensing module 404 are axisymmetrical with respect to the center point position of the positioning and welding mechanism 4, the first longitudinal sensing module 403 and the second longitudinal sensing module 404 have the same structure, and are respectively provided with a front position probe 405, a rear position probe 406, a first middle position probe 407 and a second middle position probe 408, the first middle position probe 407 and the second middle position probe 408 are connected together, and the first middle position probe 407 and the second middle position probe 408 which are connected together are positioned between the front position probe 405 and the rear position probe 406.
Example two
The invention relates to a multi-point position welding method for a lithium battery electrode column, which mainly comprises the steps of transverse positioning of a nickel strip, longitudinal welding position positioning and the like, and the specific contents are as follows.
1. Transverse positioning of the nickel strip:
(1) after the lithium batteries 2 are placed in the positioning frame 1, the nickel strips 3 are placed on the upper sides of the electrodes of the lithium batteries 2 in the same column, and meanwhile, the side ends of the nickel strips 3 are clamped between the two limiting convex plates 101 in the same group. (2) The positioning welding mechanism 4 transversely enters the upper side area of the first nickel bar 3, the first transverse probe 4021 and the second transverse probe 4022 in the transverse sensing module 402 detect the edge position of the nickel bar 3, and when the first transverse probe 4021 does not detect the nickel bar 3 and the second transverse probe 4022 detects the nickel bar, the welding module 401 completes transverse position positioning.
2. Longitudinal welding position positioning:
(1) the fixed-position welding mechanism 4 moves along the current longitudinal position of the nickel bar 3, when the first middle probe 407 and the second middle probe 408 in the first longitudinal sensing module 403 all detect the upper electrode end face and the front probe 405 of the lithium battery 2, and the rear probe 406 does not detect the upper electrode end face of the lithium battery 2 (because the upper electrode end faces of the adjacent lithium batteries 2 are circular and close to each other, the gap region between the adjacent lithium batteries 2 is detected by the front probe 405 and the rear probe 406, it is ensured that the positions detected by the first middle probe 407 and the second middle probe 408 are relatively close to the region where the adjacent lithium batteries 2 meet, and the accuracy of the longitudinal movement of the fixed-position welding mechanism 4 is ensured), the fixed-position welding mechanism 4 stops moving, and the welding module 401 performs one-time spot welding on the current position of the nickel bar 3. (2) And (3) continuously moving the positioning welding mechanism 4 along the longitudinal position of the current nickel bar 3 in the mode in the step (1) until welding is completed for a certain number of times, and stopping spot welding of the nickel bar 3 in the current direction (the number of the lithium batteries 2 which are longitudinally arranged is certain, and after the spot welding is completed for a certain number of times in the longitudinal direction, the spot welding operation in the current longitudinal direction can be determined to be completed). (3) The tack welding mechanism 4 performs a lateral movement until the third cross probe 4023 of the lateral sensing module 402 detects the nickel strip 3, and the fourth cross probe 4024 does not detect the nickel strip 3, and stops the lateral movement (the mechanism of the tack welding mechanism lateral movement is exactly the minimum distance between the first cross probe 4021 and the fourth cross probe 4024, that is, the distance between the side of the first cross probe facing the fourth cross probe and the side of the fourth cross probe facing the first cross probe). (4) The positioning welding mechanism 4 moves along the opposite direction of the previous longitudinal movement, when both the first middle probe 407 and the second middle probe 408 in the second longitudinal sensing module 404 detect the upper side electrode end face of the lithium battery 2 and both the front probe 405 and the rear probe 406 do not detect the upper side electrode end face of the lithium battery 2, the positioning welding mechanism 4 stops moving, and the welding module 401 performs one spot welding on the current position of the nickel strip 3. (5) And (5) continuously moving the positioning welding mechanism 4 along the longitudinal position of the current nickel bar 3 according to the mode in the step (4) until welding is completed for a certain number of times, and stopping the spot welding of the nickel bar 3 in the current direction.
In addition, in the invention, after the positioning welding mechanism 4 completes one positive and negative double longitudinal spot welding on one nickel strip 3, the positioning welding mechanism 4 transversely moves to the upper part of the side end of the nickel strip 3 at the next position, and the positive and negative double longitudinal spot welding is carried out on the nickel strip 3 at the next position.
When the positioning welding mechanism 4 moves longitudinally along the nickel bar 3, if the first transverse probe 4021 and the second transverse probe 4022 in the transverse sensing module 402 detect that the nickel bar 3 has transverse deviation or the third transverse probe 4023 and the fourth transverse probe 4024 detect that the nickel bar 3 has transverse deviation, the system determines that the nickel bar 3 is placed abnormally (as shown in fig. 3, when the positioning welding mechanism moves longitudinally along the welded point, the first transverse probe 4021 and the second transverse probe 4022 both detect the nickel bar 3 or both do not detect the nickel bar 3, which indicates that the position of the nickel bar 3 is abnormal, when the positioning welding mechanism moves longitudinally along the pre-welded point 302, the third transverse probe 4023 and the fourth transverse probe 4024 both detect the nickel bar 3 or both do not detect the nickel bar 3, which indicates that the position of the nickel bar 3 is abnormal), perform an abnormal warning, such as an audible and visual warning, stop the current welding, and start the continuous welding operation after a technician just puts the nickel bar 3 or confirms that the nickel bar is correct.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a lithium cell electrode post multiple spot position welding set, a plurality of lithium cell (2) array arrange in locating frame (1) within range, and lithium cell (2) welding electrode upside position, its characterized in that are arranged in nickel strip (3): a plurality of groups of limiting convex plates (101) are arranged at the opening position of the upper side of the positioning frame (1), the number of each group of limiting convex plates (101) is two, and the side end of a nickel strip (3) placed at the upper side position of an electrode of the lithium battery (2) is positioned between the two limiting convex plates (101) in the same group; a positioning welding mechanism (4) moving along the installation direction of the nickel strip (3) is arranged above the nickel strip (3), and a welding module (401), a transverse sensing module (402), a first longitudinal sensing module (403) positioned at one side of the welding module (401), and a second longitudinal sensing module (404) positioned at the other side of the welding module (401) are arranged on the bottom side surface of the positioning welding mechanism (4); the welding module (401) is configured to weld a first welding head (4011) and a second welding head (4012) at corresponding positions of a nickel strip (3) on the upper side of an electrode of the lithium battery (2); the transverse sensing module (402) comprises a first transverse probe (4021), a second transverse probe (4022), a third transverse probe (4023) and a fourth transverse probe (4024), wherein the first transverse probe (4021) is adjacent to the second transverse probe (4022), and the third transverse probe (4023) is adjacent to the fourth transverse probe (4024); the first longitudinal sensing module (403) and the second longitudinal sensing module (404) are respectively provided with a front position probe (405), a rear position probe (406), a first middle position probe (407) and a second middle position probe (408), the first middle position probe (407) and the second middle position probe (408) are positioned between the front position probe (405) and the rear position probe (406), and the first middle position probe (407) and the second middle position probe (408) are adjacent.
2. The multi-point position welding device for the electrode column of the lithium battery as claimed in claim 1, wherein: the first longitudinal sensing module (403) and the second longitudinal sensing module (404) are in the same structure which is axisymmetrical with respect to the central position of the positioning welding mechanism (4).
3. The multi-point position welding device for the electrode column of the lithium battery as claimed in claim 1, wherein: if the distance between the first transverse probe (4021) and the fourth transverse probe (4024) is La and the width of the nickel strip (3) is Lb, then Lb is greater than La; the number of the spot welding of the single-time contact part of the welding module (401) on the nickel strip (3) and the lithium battery (2) is two, two longitudinally distributed welding points are formed on the same nickel strip (3), and if the vertical distance between the two longitudinally distributed welding points is Ld, then Ld = Lb-La.
4. The multi-point position welding device for the electrode column of the lithium battery as claimed in claim 1, wherein: and if the vertical direction distance between the first middle position probe (407) and the second middle position probe (408) is Lc and the diameter size of the electrode welding end face of the lithium battery (2) is D, lc is less than D.
5. The multi-point position welding device for the electrode column of the lithium battery as claimed in claim 1, wherein: the horizontal position of the limiting convex plate (101) is higher than the horizontal position of the electrode end face on the upper side of the lithium battery (2) which is vertically placed.
6. The multi-point position welding device for the electrode column of the lithium battery as claimed in claim 1, wherein: the transverse sensing module (402) is vertically connected to the side end of the welding module (401), and the straight line positions of a first welding head (4011) and a second welding head (4012) of the welding module (401) are right opposite to the middle symmetry axis of the transverse sensing module (402).
7. A multi-point welding method for a lithium battery electrode column, which is characterized in that the multi-point welding device for the lithium battery electrode column of any one of claims 1 to 6 is adopted, and comprises the following contents: (1) transversely positioning the nickel strips: (1) after the lithium batteries (2) are placed in the positioning frame (1), nickel strips (3) are placed on the upper sides of the electrodes of the lithium batteries (2) in the same column, and the side ends of the nickel strips (3) are clamped between two limiting convex plates (101) in the same group; (2) the positioning welding mechanism (4) transversely enters the upper side area of the first nickel bar (3), a first transverse probe (4021) and a second transverse probe (4022) in the transverse sensing module (402) detect the edge position of the nickel bar (3), and when the first transverse probe (4021) does not detect the nickel bar (3) and the second transverse probe (4022) detects the nickel bar, the welding module (401) completes transverse position positioning; (2) positioning a longitudinal welding position: (1) the positioning welding mechanism (4) moves along the current longitudinal position of the nickel bar (3), when a first middle probe (407) and a second middle probe (408) in the first longitudinal sensing module (403) both detect the upper side electrode end face of the lithium battery (2) and a front probe (405) and a rear probe (406) do not detect the upper side electrode end face of the lithium battery (2), the positioning welding mechanism (4) stops moving, and the welding module (401) performs one-time spot welding on the current position of the nickel bar (3); (2) the positioning welding mechanism (4) continues to move along the longitudinal position of the current nickel bar (3) in the mode in the step (1) until welding is completed for a certain number of times, and then the spot welding of the nickel bar (3) in the current direction is stopped; (3) the positioning welding mechanism (4) performs one-time transverse movement until a third transverse probe (4023) of the transverse sensing module (402) detects a nickel strip (3), and a fourth transverse probe (4024) does not detect the nickel strip (3); (4) the positioning welding mechanism (4) moves along the opposite direction of the previous longitudinal movement, when a first middle probe (407) and a second middle probe (408) in the second longitudinal sensing module (404) both detect the end face of the upper side electrode of the lithium battery (2) and a front probe (405) and a rear probe (406) do not detect the end face of the upper side electrode of the lithium battery (2), the positioning welding mechanism (4) stops moving, and the welding module (401) performs one-time spot welding on the current position of the nickel bar (3); (5) and (5) continuously moving the positioning welding mechanism (4) along the longitudinal position of the current nickel bar (3) according to the mode in the step (4) until the welding is finished for a certain number of times, and stopping the spot welding of the nickel bar (3) in the current direction.
8. The multi-point position welding method for the electrode column of the lithium battery as claimed in claim 7, wherein: in the longitudinal movement process of the positioning welding mechanism (4) along the nickel bar (3), if the first transverse probe (4021) and the second transverse probe (4022) in the transverse sensing module (402) detect that the nickel bar (3) has transverse offset or the third transverse probe (4023) and the fourth transverse probe (4024) detect that the nickel bar (3) has transverse offset, the system judges that the nickel bar (3) is placed to be abnormal, and the abnormality reminding is carried out.
9. The multi-point position welding method for the electrode column of the lithium battery as claimed in claim 7, wherein: after the positioning welding mechanism (4) completes one forward and backward double-longitudinal spot welding on one nickel strip (3), the positioning welding mechanism (4) transversely moves to the upper part of the side end of the nickel strip (3) at the next position, and the forward and backward double-longitudinal spot welding is performed on the nickel strip (3) at the next position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211373404.6A CN115502625B (en) | 2022-11-04 | 2022-11-04 | Multi-point welding device and method for lithium battery electrode column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211373404.6A CN115502625B (en) | 2022-11-04 | 2022-11-04 | Multi-point welding device and method for lithium battery electrode column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115502625A true CN115502625A (en) | 2022-12-23 |
| CN115502625B CN115502625B (en) | 2023-04-07 |
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| CN202211373404.6A Active CN115502625B (en) | 2022-11-04 | 2022-11-04 | Multi-point welding device and method for lithium battery electrode column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116921943A (en) * | 2023-09-15 | 2023-10-24 | 广东洋基科技有限公司 | Multi-dimensional auxiliary welding device and method for electrode nickel plate of lithium battery pack |
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| CN208753418U (en) * | 2018-10-23 | 2019-04-16 | 洛阳鑫光锂电科技有限公司 | A kind of connection structure of lithium battery mould group |
| GB202103057D0 (en) * | 2021-03-04 | 2021-04-21 | Jaguar Land Rover Ltd | Clamping plates for battery manufacture |
| CN114069162A (en) * | 2021-11-15 | 2022-02-18 | 安徽金欣源工业材料有限公司 | Spliced spot-welding type battery nickel sheet and spot welding process thereof |
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| CN105531847A (en) * | 2013-09-11 | 2016-04-27 | 日本碍子株式会社 | Battery-pack case |
| CN108994436A (en) * | 2018-08-08 | 2018-12-14 | 泰州天科电子科技有限公司 | Lithium battery copper aluminium electrode welding procedure |
| CN208753418U (en) * | 2018-10-23 | 2019-04-16 | 洛阳鑫光锂电科技有限公司 | A kind of connection structure of lithium battery mould group |
| GB202103057D0 (en) * | 2021-03-04 | 2021-04-21 | Jaguar Land Rover Ltd | Clamping plates for battery manufacture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116921943A (en) * | 2023-09-15 | 2023-10-24 | 广东洋基科技有限公司 | Multi-dimensional auxiliary welding device and method for electrode nickel plate of lithium battery pack |
| CN116921943B (en) * | 2023-09-15 | 2024-01-23 | 广东洋基科技有限公司 | Multi-dimensional auxiliary welding device and method for electrode nickel plate of lithium battery pack |
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| CN115502625B (en) | 2023-04-07 |
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