CN115411464A - Welding method, system and control device for full-lug cylindrical battery cell current collecting disc - Google Patents

Welding method, system and control device for full-lug cylindrical battery cell current collecting disc Download PDF

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Publication number
CN115411464A
CN115411464A CN202211124824.0A CN202211124824A CN115411464A CN 115411464 A CN115411464 A CN 115411464A CN 202211124824 A CN202211124824 A CN 202211124824A CN 115411464 A CN115411464 A CN 115411464A
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China
Prior art keywords
target
current collecting
welded
collecting disc
position information
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Granted
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CN202211124824.0A
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Chinese (zh)
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CN115411464B (en
Inventor
安敏俊
薄晋科
李猛
王东
冯建伟
王世玉
张良
宋慧洁
曹仕良
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Dalian CBAK Power Battery Co Ltd
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Dalian CBAK Power Battery Co Ltd
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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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a method, a system and a control device for welding a full-lug cylindrical battery core current collecting disc, wherein the method for welding the full-lug cylindrical battery core current collecting disc comprises the following steps: acquiring a first image of a target end face of the cylindrical winding core and a second image of a current collecting disc to be welded; simulating target position information of the current collecting disc to be welded on the target end face based on the first image and the second image; placing the current collecting disc to be welded on the target end face to obtain the actual position information of the current collecting disc to be welded on the target end face; and under the condition that the actual position information is consistent with the target position information, welding the current collecting plate to be welded on the target end face. The invention can avoid the deflection of the current collecting disc to be welded relative to the target end surface of the cylindrical winding core, greatly improve the welding effect, and improve the production qualification rate of the battery core, thereby improving the production efficiency of the battery.

Description

Welding method, system and control device for full-lug cylindrical battery cell current collecting disc
Technical Field
The invention relates to the technical field of battery production, in particular to a method, a system and a control device for welding a full-lug cylindrical battery cell current collecting disc.
Background
With the rapid development of the lithium battery industry, the application of the full-tab battery is more and more extensive. In the preparation process of the full-tab battery, the welding quality of the current collecting disc and the end face of the winding core has important influence on the subsequent preparation work of the full-tab battery.
In the related technology, after the preparation of the winding core is finished, two end faces of the winding core are rubbed to be flat, then the current collecting disc is attached to the end face tabs of the winding core, and the current collecting disc is welded.
In the welding process, the anode current collecting disc and the cathode current collecting disc are easy to deviate from the end face of the winding core, so that subsequent operations cannot be normally completed, for example, the phenomenon that an insulating sheet cannot be placed is easy to occur, the insulating sheet cannot be normally installed on the anode end face of the winding core, and the electrolyte can be injected into the battery shell, so that the batch production of the battery is influenced.
Disclosure of Invention
The invention provides a method, a system and a control device for welding a full-lug cylindrical battery core current collecting disc, which are used for solving the problem that the current collecting disc is easy to deviate from the end face of a winding core in the existing welding process.
The invention provides a method for welding a full-lug cylindrical battery core current collecting disc, which comprises the following steps: acquiring a first image of a target end face of the cylindrical winding core and a second image of a current collecting disc to be welded; simulating target position information of the current collecting disc to be welded on the target end face based on the first image and the second image; placing the current collecting disc to be welded on the target end face, and acquiring the actual position information of the current collecting disc to be welded on the target end face; and under the condition that the actual position information is consistent with the target position information, welding the current collecting plate to be welded on the target end face.
According to the method for welding the full-lug cylindrical battery core current collecting disc, the target position information of the current collecting disc to be welded, which is welded on the target end face, is simulated based on the first image and the second image, and the method comprises the following steps: extracting a first contour feature of the target end face based on the first image, and extracting a second contour feature of the to-be-welded current collecting plate based on the second image; extracting first coordinate information of a central point of the first contour feature based on the first contour feature, and extracting second coordinate information of a central point of the second contour feature based on the second contour feature; combining the first contour feature and the second contour feature to simulate the target location information based on the first coordinate information and the second coordinate information.
According to the method for welding the full-lug cylindrical cell current collecting disc, the combination of the first profile characteristic and the second profile characteristic based on the first coordinate information and the second coordinate information comprises the following steps: and based on the first coordinate information and the second coordinate information, the first contour feature and the second contour feature are positioned in an alignment mode, and the center point of the first contour feature is coincided with the center point of the second contour feature.
According to the method for welding the full-tab cylindrical cell current collecting disc provided by the invention, the first profile feature and the second profile feature are combined based on the first coordinate information and the second coordinate information, and the method further comprises the following steps: acquiring a simulation graph after the first contour feature and the second contour feature are positioned; respectively acquiring area values of a first target area and a second target area in the simulation graph based on the simulation graph; determining the target position information in the case that the area values of the first target region and the second target region are equal; the first target area and the second target area are relatively distributed on two sides of the central point of the simulation graph.
According to the method for welding the current collecting disc of the full-lug cylindrical battery cell provided by the invention, the current collecting disc to be welded is placed on the target end face, and the actual position information of the current collecting disc to be welded on the target end face is obtained, wherein the method comprises the following steps: obtaining a third image of the current collecting disc to be welded placed on the end face of the target; extracting a third contour feature of the current collecting disc to be welded placed on the target end face based on the third image; and acquiring the actual position information based on the third contour feature.
According to the method for welding the full-lug cylindrical battery core current collecting disc, the actual position information is obtained based on the third profile characteristic, and the method comprises the following steps: respectively acquiring area values of a third target area and a fourth target area based on the third contour feature; determining the actual position information when the area values of the third target region and the fourth target region are equal; the third target area and the fourth target area are relatively distributed on two sides of a central point of the third contour feature, the third target area corresponds to the first target area, and the fourth target area corresponds to the second target area.
According to the method for welding the collector disc of the full-lug cylindrical battery cell provided by the invention, under the condition that the actual position information is consistent with the target position information, the collector disc to be welded is welded on the target end face, and the method comprises the following steps: and under the condition that the area values of the third target area are equal to the area values of the first target area, the fourth target area and the second target area, welding the current collecting plate to be welded to the target end face.
According to the method for welding the full-lug cylindrical battery cell current collecting disc provided by the invention, after simulating the target position information of the current collecting disc to be welded on the target end surface based on the first image and the second image, the method further comprises the following steps: and placing the current collecting disc to be welded on the target end face based on the target position information.
According to the method for welding the full-lug cylindrical battery cell current collecting disc provided by the invention, after the current collecting disc to be welded is placed on the target end face and the actual position information of the current collecting disc to be welded on the target end face is obtained, the method further comprises the following steps: and under the condition that the actual position information is inconsistent with the target position information, adjusting the placing position of the current collecting plate to be welded to a target position corresponding to the target position information.
The invention also provides a full-lug cylindrical battery cell current collecting disc welding system, which comprises: the device comprises a graph acquisition device and a control device; and the control device is connected with the pattern acquisition device and is used for executing any one of the full-lug cylindrical battery cell current collecting disc welding methods.
The invention also provides a full-lug cylindrical battery cell current collecting disc welding system, which comprises: the first acquisition module is used for acquiring a first image of the target end face of the cylindrical winding core and a second image of the current collecting disc to be welded; the simulation module is used for simulating the target position information of the current collecting disc to be welded on the target end face based on the first image and the second image; the second acquisition module is used for placing the current collecting disc to be welded on the target end face and acquiring the actual position information of the current collecting disc to be welded on the target end face; and the execution module is used for welding the current collecting disc to be welded on the target end face under the condition that the actual position information is consistent with the target position information.
The invention also provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize any one of the above full-lug cylindrical battery cell current collecting disc welding methods.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a full tab cylindrical cell collector disc welding method as described in any of the above.
The invention also provides a computer program product comprising a computer program, wherein the computer program is executed by a processor to implement any one of the above-mentioned full-tab cylindrical cell current collecting disc welding methods.
The method, the system and the control device for welding the full-lug cylindrical battery core current collecting disc are characterized in that a first image of the target end face of a cylindrical winding core and a second image of the current collecting disc to be welded are obtained before welding to simulate target position information of the current collecting disc to be welded on the target end face of the cylindrical winding core, actual position information of the current collecting disc to be welded on the target end face of the cylindrical winding core is obtained during placement, and the current collecting disc to be welded is determined to be welded at the optimal position by comparing the actual position information with the target position information, so that the current collecting disc to be welded is prevented from deviating relative to the target end face of the cylindrical winding core, the welding effect is greatly improved, the qualified rate of battery core production is improved, and the production efficiency of batteries is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for 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 those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flow diagram of a method for welding a full-tab cylindrical cell current collector disc according to some embodiments of the present invention;
FIG. 2 is a schematic diagram of a cylindrical winding core provided by some embodiments of the invention;
FIG. 3 is one of the simulated patterns for placement of a simulated positive current collector disk on a target end face provided by some embodiments of the invention;
fig. 4 is a simulated graphic of a simulated anode current collecting disk placed on a target end face according to some embodiments of the present invention;
fig. 5 is a second simulation diagram of a simulated positive current collecting plate placed on a target end face according to some embodiments of the present invention;
fig. 6 is a schematic structural diagram of a control apparatus for welding a full-tab cylindrical cell current collecting disc according to some embodiments of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to some embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, 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 making any creative effort, shall fall within the protection scope of the present invention.
The current collecting plate comprises an anode current collecting plate and a cathode current collecting plate, and the anode current collecting plate and the cathode current collecting plate are respectively welded at two ends of the cylindrical battery cell.
In the welding process, the anode current collecting disc and the cathode current collecting disc are easy to deviate from the end face of the winding core, so that the subsequent operation cannot be normally finished, and the batch production of the battery is influenced.
Aiming at the problems, the invention provides a method, a system and a control device for welding a full-lug cylindrical battery core current collecting disc, which are used for solving the problem that the current collecting disc is easy to deviate from the end face of a winding core in the existing welding process, so that the welding effect is improved, the production qualification rate of a battery core is improved, and the production efficiency of a battery is improved.
The method, system and control device for welding the full-tab cylindrical cell current collecting disc according to the present invention will be described with reference to fig. 1 to 7.
As shown in fig. 1, the method for welding a full-tab cylindrical cell current collecting disc according to the present invention includes steps 110, 120, 130, and 140.
And 110, acquiring a first image of the target end face of the cylindrical winding core and a second image of the current collecting disc to be welded.
The control device controls the image acquisition device to acquire a first image and a second image, wherein the first image comprises a target end face of the cylindrical winding core, and the second image comprises an opposite face of a face to be welded of the current collecting disc to be welded.
As shown in fig. 2, the target end face of the cylindrical winding core may be a to-be-welded end face of two ends of the cylindrical winding core, and the to-be-welded current collecting disc may be a positive current collecting disc or a negative current collecting disc.
In some embodiments, the anode current collector disk is rectangular with an aperture in the middle and the anode current collector disk is rectangular without an aperture, as shown in fig. 3.
And 120, simulating target position information of the current collecting plate to be welded on the target end surface based on the first image and the second image.
The target position information is the optimal position for simulating the current collecting disc to be welded on the target end face, and comprises the virtual position coordinates of the current collecting disc to be welded on the target end face and the area of each area surrounded by the current collecting disc to be welded and the target end face.
And 130, placing the current collecting plate to be welded on the end surface of the target, and acquiring the actual position information of the current collecting plate to be welded on the end surface of the target.
The actual position information is the actual position of the current collecting disc to be welded on the target end face, and comprises the actual position coordinates of the current collecting disc to be welded on the target end face and the area of each area surrounded by the current collecting disc to be welded and the target end face.
And 140, welding the current collecting plate to be welded on the end surface of the target under the condition that the actual position information is consistent with the target position information.
And under the condition that the actual position information is consistent with the target position information, the current collecting plate to be welded is placed at the optimal position of the target end face, and welding can be carried out.
The invention provides a method for welding a full-lug cylindrical battery core current collecting disc, which is characterized in that a first image of a target end face of a cylindrical winding core and a second image of a current collecting disc to be welded are obtained before welding to simulate target position information of the current collecting disc to be welded on the target end face of the cylindrical winding core, actual position information of the current collecting disc to be welded on the target end face of the cylindrical winding core is obtained during placing, and welding is carried out when the current collecting disc to be welded is placed at the optimal position through comparison of the actual position information and the target position information, so that the current collecting disc to be welded is prevented from deviating relative to the target end face of the cylindrical winding core, the welding effect is greatly improved, the production yield of a battery cell is improved, and the production efficiency of the battery is improved.
Further, step 120 includes: extracting a first contour feature of the target end face based on the first image, and extracting a second contour feature of the current collecting disc to be welded based on the second image; extracting first coordinate information of a central point of the first contour feature based on the first contour feature, and extracting second coordinate information of a central point of the second contour feature based on the second contour feature; the first and second contour features are combined based on the first and second coordinate information to simulate target location information.
The first contour feature is the contour feature of the outer boundary of the target end face of the cylindrical battery cell, and the second contour feature is the contour feature of the outer boundary of the current collecting disc to be welded.
The first coordinate information is coordinate information corresponding to a central point of the outer boundary of the target end face, and the second coordinate information is coordinate information corresponding to a central point of the outer boundary of the to-be-welded current collecting plate.
In some embodiments, a center point of an outer boundary of the target end face is located at an origin of coordinates in a corresponding coordinate system, and a center point of an outer boundary of the current collecting plate to be welded is located at the origin of coordinates in the corresponding coordinate system.
In this step, the first contour feature and the second contour feature are placed in the same coordinate system, and based on the first coordinate information and the second coordinate information, the first contour feature and the second contour feature are combined to ensure that centers of the first contour feature and the second contour feature are correspondingly placed according to a preset position, so that center offset of the first contour feature and the second contour feature is avoided.
In some embodiments, as shown in fig. 3, combining the first and second contour features based on the first and second coordinate information includes: and based on the first coordinate information and the second coordinate information, the first contour feature and the second contour feature are placed in an aligned mode, so that the central point of the first contour feature is coincided with the central point of the second contour feature, and the central deviation of the first contour feature and the central point of the second contour feature is avoided.
In some embodiments, combining the first contour feature and the second contour feature based on the first coordinate information and the second coordinate information further comprises: acquiring a simulation graph after the first contour feature and the second contour feature are positioned; respectively acquiring area values of a first target area and a second target area in the simulation graph based on the simulation graph; in the case where the area values of the first target region and the second target region are equal, the target position information is determined.
The first target area and the second target area are distributed on two opposite sides of a central point of the simulation graph.
In some embodiments, the diagonal of the second profile feature of the to-be-welded current collecting disk is equal to or greater than the diameter of the first profile feature of the cylindrical jellyroll. The first target area is a first area surrounded by the first contour feature and the second contour feature, and the second target area is a second area surrounded by the first contour feature and the second contour feature.
FIG. 3 is a simulation graph of the anode current collecting plate welded on a cylindrical winding core, wherein the area values of the area blocks are S1, S2, S3, S4, S5 and S6 respectively; s1 is the blank area on the left side of the current collecting disc, S2 is the blank area on the right side of the current collecting disc, S3 is the blank area on the upper side of the current collecting disc, S4 is the blank area on the lower side of the current collecting disc, S5 is the area of the hole in the center of the cylindrical winding core, and S6 is the area of the current collecting disc.
The area relation of each area block in the simulation graph is S = S1+ S2+ S3+ S4+ S5+ S6, wherein if S1= S2, S3= S4, it indicates that the second contour feature is located at the center of the first contour feature.
FIG. 4 is a simulated graph of an anode current collecting plate welded on a cylindrical winding core, wherein area values of the area blocks are S1, S2, S3, S4 and S6 respectively; s1 is the blank area on the left side of the current collecting disc, S2 is the blank area on the right side of the current collecting disc, S3 is the blank area on the upper side of the current collecting disc, S4 is the blank area on the lower side of the current collecting disc, and S6 is the area of the current collecting disc.
The area relation of each area block in the simulation graph is S = S1+ S2+ S3+ S4+ S6, wherein if S1= S2 and S3= S4, it indicates that the second contour feature is located at the center of the first contour feature.
It should be noted that the first target area and the second target area may be S1 and S2, or S3 and S4. If the area values of the first target area and the second target area are equal, the second contour feature is located at the center of the first contour feature after the combination of the second contour feature and the first contour feature is indicated.
In some embodiments, the diagonal of the second profile feature of the to-be-welded current collecting disk is smaller than the diameter of the first profile feature of the cylindrical jellyroll. Each area block in the simulation graph is an area surrounded by a diagonal line of the to-be-welded current collecting plate, the first outline feature and the second outline feature.
FIG. 5 is a simulated graph of a small-sized anode current collecting plate welded on a cylindrical winding core, wherein the area values of the area blocks are S1, S2, S3, S4 and S6 respectively; s1 is the blank area on the left side of the current collecting disc, S2 is the blank area on the right side of the current collecting disc, S3 is the blank area on the upper side of the current collecting disc, S4 is the blank area on the lower side of the current collecting disc, and S6 is the area of the current collecting disc.
The area relation of each area block in the simulation graph is S = S1+ S2+ S3+ S4+ S6, wherein if S1= S2 and S3= S4, it indicates that the second contour feature is located at the center of the first contour feature.
It should be noted that the first target area and the second target area may be S1 and S2, or S3 and S4. If the area values of the first target area and the second target area are equal, the second contour feature is located at the center of the first contour feature after the combination of the second contour feature and the first contour feature is indicated.
Further, step 130 includes: obtaining a third image of the current collecting disc to be welded placed on the end face of the target; extracting a third contour feature of the current collecting disc to be welded placed on the end face of the target based on the third image; and acquiring actual position information based on the third contour feature.
After the current collecting disc to be welded is placed on the end face of the target, the control device controls the image acquisition device, and the image acquisition device acquires an actual image of the current collecting disc to be welded placed on the end face of the target.
And the third contour characteristic is the outer boundary contour of the combination of the collector plate to be welded and the target end surface in the actual image.
Further, based on the third profile feature, acquiring actual position information, including: respectively acquiring area values of a third target area and a fourth target area based on the third contour feature; in the case where the area values of the third target region and the fourth target region are equal, the actual position information is determined.
The third target area and the fourth target area are relatively distributed on two sides of a central point of the third contour feature, the third target area corresponds to the first target area, and the fourth target area corresponds to the second target area.
In some embodiments, the diagonal of the to-be-welded current collecting disc is equal to or greater than the diameter of the target end face of the cylindrical winding core. The third target area is a first area surrounded by the current collecting disc to be welded and the target end face, and the fourth target area is a second area surrounded by the current collecting disc to be welded and the target end face.
The method for dividing each region of the third contour feature of the actual graph is the same as the method for dividing each region in the simulated graph, and is not described herein again.
In the case where the area values of the third target region and the fourth target region are equal, it is indicated that the current collecting plate to be welded is located at the center position of the target end surface.
Further, in a case where the actual position information coincides with the target position information, welding the current collecting plate to be welded to the target end surface includes: and under the condition that the area values of the third target area are equal to the area values of the first target area and the fourth target area are equal to the area values of the second target area, the actual position of the current collecting plate to be welded on the target end surface is consistent with the target position, and welding can be carried out.
It is understood that the area values of the third target region and the first target region, and the area values of the fourth target region and the second target region are equal, that is, the areas of the first target region, the second target region, the third target region and the fourth target region are equal.
In some embodiments, after step 120, further comprising: and placing the current collecting disc to be welded on the end surface of the target based on the target position information.
In this embodiment, the control device controls the to-be-welded current collecting plate to be placed according to the corresponding target position in the target position information based on the target position information, so that the difference between the actual position information and the target position information is reduced, the adjustment time is shortened, and the production efficiency is improved.
In some embodiments, after step 130, further comprising: and under the condition that the actual position information is inconsistent with the target position information, adjusting the placement position of the current collecting plate to be welded to the target position corresponding to the target position information, further reducing the deviation between the current collecting plate to be welded and the target end face, and improving the welding effect.
The invention provides a method for welding a full-lug cylindrical battery core current collecting disc, which is characterized in that a first image of a target end face of a cylindrical winding core and a second image of a current collecting disc to be welded are obtained before welding to simulate target position information of the current collecting disc to be welded on the target end face of the cylindrical winding core, actual position information of the current collecting disc to be welded on the target end face of the cylindrical winding core is obtained during placing, welding is carried out when the current collecting disc to be welded is placed at the optimal position through comparison of the actual position information and the target position information, meanwhile, deviation adjustment is carried out before welding, deviation of the current collecting disc to be welded relative to the target end face of the cylindrical winding core can be avoided, the welding effect is greatly improved, the qualified rate of battery cell production is improved, and the production efficiency of batteries is improved.
The invention also provides a full-lug cylindrical battery cell current collecting disc welding system which comprises a graph acquisition device and a control device, wherein the control device is connected with the graph acquisition device, and the control device is used for executing any one of the full-lug cylindrical battery cell current collecting disc welding methods.
The full-lug cylindrical battery cell current collecting disc welding system provided by the invention simulates the target position information of the current collecting disc to be welded on the target end surface of the cylindrical winding core by acquiring the first image of the target end surface of the cylindrical winding core and the second image of the current collecting disc to be welded before welding, acquires the actual position information of the current collecting disc to be welded on the target end surface of the cylindrical winding core during the placement, determines to weld when the current collecting disc to be welded is placed at the optimal position by comparing the actual position information with the target position information, and performs deviation adjustment before welding, so that the deviation of the current collecting disc to be welded relative to the target end surface of the cylindrical winding core can be avoided, the welding effect is greatly improved, the battery cell production qualification rate is improved, and the production efficiency of batteries is improved.
The following describes a control device for welding a full-lug cylindrical battery cell current collecting disc provided by the present invention, and the control device for welding a full-lug cylindrical battery cell current collecting disc described below and the above-described method for welding a full-lug cylindrical battery cell current collecting disc can be referred to correspondingly.
As shown in fig. 6, the control device for welding the full-tab cylindrical cell current collecting disc provided by the present invention includes: a first obtaining module 610, a simulating module 620, a second obtaining module 630 and an executing module 640.
The first acquiring module 610 is configured to acquire a first image of a target end face of the cylindrical winding core and a second image of a current collecting disk to be welded.
And the simulation module 620 is used for simulating the target position information of the current collecting plate to be welded on the target end surface based on the first image and the second image.
And a second obtaining module 630, configured to place the current collecting tray to be welded on the target end face, and obtain actual position information of the current collecting tray to be welded on the target end face.
And the execution module 640 is used for welding the current collecting plate to be welded on the end face of the target under the condition that the actual position information is consistent with the target position information.
The control device for welding the collector disc of the full-lug cylindrical battery core, provided by the invention, is used for simulating the target position information of the collector disc to be welded on the target end surface of the cylindrical winding core by acquiring the first image of the target end surface of the cylindrical winding core and the second image of the collector disc to be welded before welding, acquiring the actual position information of the collector disc to be welded on the target end surface of the cylindrical winding core during the placement, determining the best position of the collector disc to be welded for welding by comparing the actual position information with the target position information, and simultaneously performing deviation adjustment before welding, so that the deviation of the collector disc to be welded relative to the target end surface of the cylindrical winding core can be avoided, the welding effect is greatly improved, the qualified rate of battery core production is improved, and the production efficiency of a battery is improved.
Fig. 7 illustrates a physical structure diagram of an electronic device, and as shown in fig. 7, the electronic device may include: a processor (processor) 710, a communication Interface (Communications Interface) 720, a memory (memory) 730, and a communication bus 740, wherein the processor 710, the communication Interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 may invoke logic instructions in the memory 730 to perform a method of full tab cylindrical cell collector disk welding, the method comprising: acquiring a first image of a target end face of the cylindrical winding core and a second image of a current collecting disc to be welded; simulating target position information of the current collecting disc to be welded on the target end face based on the first image and the second image; placing a current collecting disc to be welded on the end surface of a target, and acquiring the actual position information of the current collecting disc to be welded on the end surface of the target; and under the condition that the actual position information is consistent with the target position information, welding the current collecting plate to be welded on the target end face.
In addition, the logic instructions in the memory 730 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program that can be stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the computer can execute the method for welding a full tab cylindrical cell current collector provided by the above methods, where the method includes: acquiring a first image of a target end face of the cylindrical winding core and a second image of a current collecting disc to be welded; simulating target position information of the current collecting disc to be welded on the target end face based on the first image and the second image; placing a current collecting disc to be welded on the end surface of a target, and acquiring the actual position information of the current collecting disc to be welded on the end surface of the target; and under the condition that the actual position information is consistent with the target position information, welding the current collecting plate to be welded on the target end face.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements a method of full-tab cylindrical cell current disc welding provided by the above methods, the method comprising: acquiring a first image of a target end face of the cylindrical winding core and a second image of a current collecting disc to be welded; simulating target position information of the current collecting disc to be welded on the target end face based on the first image and the second image; placing a current collecting disc to be welded on the end surface of a target, and acquiring the actual position information of the current collecting disc to be welded on the end surface of the target; and under the condition that the actual position information is consistent with the target position information, welding the current collecting plate to be welded on the target end face.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for welding a full-lug cylindrical battery core current collecting disc is characterized by comprising the following steps:
acquiring a first image of a target end face of the cylindrical winding core and a second image of a current collecting disc to be welded;
simulating target position information of the current collecting disc to be welded on the target end face based on the first image and the second image;
placing the current collecting disc to be welded on the target end face, and acquiring the actual position information of the current collecting disc to be welded on the target end face;
and under the condition that the actual position information is consistent with the target position information, welding the current collecting plate to be welded on the target end face.
2. The method of claim 1, wherein simulating target position information of the to-be-welded current collector plate welded on the target end surface based on the first image and the second image comprises:
extracting a first contour feature of the target end face based on the first image, and extracting a second contour feature of the to-be-welded current collecting plate based on the second image;
extracting first coordinate information of a central point of the first contour feature based on the first contour feature, and extracting second coordinate information of a central point of the second contour feature based on the second contour feature;
combining the first contour feature and the second contour feature to simulate the target location information based on the first coordinate information and the second coordinate information.
3. The method of full-tab cylindrical cell current collector disk welding of claim 2, wherein said combining the first and second profile features based on the first and second coordinate information comprises:
and based on the first coordinate information and the second coordinate information, the first contour feature and the second contour feature are positioned in a contraposition mode, and the central point of the first contour feature is coincided with the central point of the second contour feature.
4. The method of full-tab cylindrical cell current collector disk welding of claim 2, wherein combining the first and second profile features based on the first and second coordinate information further comprises:
acquiring a simulation graph after the first contour feature and the second contour feature are placed in position;
respectively acquiring area values of a first target area and a second target area in the simulation graph based on the simulation graph;
determining the target position information in the case that the area values of the first target region and the second target region are equal;
the first target area and the second target area are relatively distributed on two sides of the central point of the simulation graph.
5. The method for welding the full-lug cylindrical cell current collecting disc according to claim 4, wherein the step of placing the current collecting disc to be welded on the target end face to obtain the actual position information of the current collecting disc to be welded on the target end face comprises the following steps:
obtaining a third image of the current collecting disc to be welded placed on the end face of the target;
extracting a third contour feature of the current collecting disc to be welded placed on the target end face based on the third image;
and acquiring the actual position information based on the third contour feature.
6. The method of full-tab cylindrical cell current collector disk welding according to claim 5, wherein the obtaining the actual position information based on the third profile feature comprises:
respectively acquiring area values of a third target area and a fourth target area based on the third contour feature;
determining the actual position information when the area values of the third target region and the fourth target region are equal;
the third target area and the fourth target area are relatively distributed on two sides of a central point of the third contour feature, the third target area corresponds to the first target area, and the fourth target area corresponds to the second target area.
7. The method for welding full-lug cylindrical cell current collector discs according to claim 6, wherein the step of welding the current collector disc to be welded to the target end face under the condition that the actual position information is consistent with the target position information comprises the steps of:
and under the condition that the area values of the third target area are equal to the area values of the first target area, the fourth target area and the second target area, welding the current collecting disc to be welded to the target end surface.
8. The method of welding a full-tab cylindrical cell current collector disc according to any one of claims 1 to 7, further comprising, after simulating target position information of the current collector disc to be welded on the target end surface based on the first image and the second image:
and placing the current collecting disc to be welded on the target end face based on the target position information.
9. The method for welding the full-lug cylindrical cell current collecting disc according to any one of claims 1 to 7, wherein after the current collecting disc to be welded is placed on the target end surface and the actual position information of the current collecting disc to be welded on the target end surface is obtained, the method further comprises:
and under the condition that the actual position information is inconsistent with the target position information, adjusting the placing position of the current collecting plate to be welded to a target position corresponding to the target position information.
10. The utility model provides a full utmost point ear cylinder electricity core current collection dish welding system which characterized in that includes:
a pattern acquisition device;
a control device connected with the pattern acquisition device and used for executing the full-tab cylindrical cell current collecting disc welding method according to any one of claims 1 to 9.
CN202211124824.0A 2022-09-15 2022-09-15 Method, system and control device for welding full-lug cylindrical cell current collecting disc Active CN115411464B (en)

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CN112658643A (en) * 2020-12-30 2021-04-16 中国科学院自动化研究所 Connector assembly method
CN113787256A (en) * 2021-10-08 2021-12-14 兰钧新能源科技有限公司 Pole welding method and battery shell
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044072A (en) * 1990-04-13 1991-09-03 Air-Vac Engineering Company, Inc. Vision system apparatus and method for component/pad alignment
CN1640607A (en) * 2004-01-02 2005-07-20 上海工程技术大学 Thin-plate laser cutting-welding machine workpiece positioning photoelectric measuring and controlling device
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