CN117206676A - Method and system for realizing real-time compensation in welding process of battery pole - Google Patents
Method and system for realizing real-time compensation in welding process of battery pole Download PDFInfo
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Abstract
The invention relates to a method and a system for realizing real-time compensation in the welding process of a battery pole, wherein the method comprises the following steps: s1, acquiring image information of a welding surface of a pole, extracting characteristics of the image information of the pole, calculating coordinates of a central point of the pole, judging whether an installation gap of the pole is within a first preset value, and if so, performing a step S2; if not, suspending welding; s2, judging whether the difference value between the center coordinate of the pole and the first reference value is within a second preset value, if so, performing a step S3; if not, suspending welding; s3, judging whether a difference value between a theoretical compensation value and an actual compensation value between the coordinate value of the center of the welding surface of the pole and the coordinate value of the laser emitting head is within a third preset value, if so, compensating the coordinate value of the center of the moving track of the laser emitting head so that the center of the moving track of the laser emitting head always coincides with the center of the pole in the welding process; if not, the welding is paused. The invention solves the problems that the welding focal length cannot be flexibly changed and the welding track is deviated.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to a method and a system for realizing real-time compensation in a welding process of a battery pole.
Background
At present, an electric automobile has become a common knowledge in the automobile industry, and a square cell top cover is used as an essential important structural member in a cell of a new energy power battery, and mainly comprises a cover plate semi-finished product, a cell positive and negative electrode post, an explosion-proof valve, a sealing ring, a resin bracket, an explosion-proof film and the like, wherein the positive and negative electrode post is used for outputting current and connecting with an external circuit.
The working principle of the laser welding of the energy storage battery pole is that the laser beam is focused on the contact surface of the battery pole and the connecting sheet by utilizing the high energy, high directivity and high focusing property of the laser beam, so that the battery pole is quickly melted and solidified to form a firm welding spot or welding seam.
However, the existing laser welding has the following disadvantages: the problems of poor assembly of the polar post, overlarge concentricity deviation after welding of the polar post, incapability of flexibly changing welding focal length fixation, deviation of welding tracks, poor appearance effect, deviation and burst of welding seams and the like exist in the welding process of the polar post, and the performance and the safety of the battery are reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a system for realizing real-time compensation in the welding process of a battery pole.
The technical scheme adopted by the invention is as follows:
a method for realizing real-time compensation in the welding process of battery poles comprises the following steps:
s1, acquiring image information of a welding surface of a pole, extracting characteristics of the image information of the pole, calculating coordinates of a central point of the pole, judging whether an installation gap of the pole is within a first preset value, and if so, performing a step S2; if not, suspending welding;
s2, judging whether the difference value between the center coordinate of the pole and the first reference value is within a second preset value, if so, performing a step S3; if not, suspending welding;
s3, judging whether a difference value between a theoretical compensation value and an actual compensation value between the coordinate value of the center of the welding surface of the pole and the coordinate value of the laser emitting head is within a third preset value, and if so, compensating the coordinate value of the center of the moving track of the laser emitting head so that the center of the moving track of the laser emitting head always coincides with the center of the pole in the welding process; if not, the welding is paused.
In one embodiment of the present invention, the calculation formula of the theoretical compensation value between the center coordinate value of the welding surface of the polar column and the coordinate value of the laser emitting head is as follows:
ΔX 1 ＝A 1 -A 2
ΔY 1 ＝B 1 -B 2
wherein: ΔX 1 To theoretically compensate the coordinate value of the X axis, A 1 Is the coordinate value of the X axis of the center of the pole, A 2 As coordinate value of reference X-axis, deltaY 1 To theoretically compensate the coordinate value of the Y axis, B 1 B is the coordinate value of the Y axis of the center of the pole 2 Is the coordinate value of the reference X-axis.
In one embodiment of the present invention, the calculation formula of the actual compensation value between the center coordinate value of the welding surface of the polar column and the coordinate value of the laser emitting head is as follows:
ΔX 2 ＝X 2 -X 1
ΔY 2 ＝Y 2 -Y 1
wherein: ΔX 2 For the coordinate value of the X-axis actually compensated, X 1 And X 2 Respectively compensating the coordinate values of the X-axis before and after the delta Y 2 For the coordinate value of the Y-axis actually compensated, Y 1 And Y 2 The coordinate values of the Y axis before and after compensation are respectively obtained.
In one embodiment of the invention, the first preset value is 0.15mm±0.05mm; the second preset value is 1mm plus or minus 0.05mm; the third preset value is 0.05mm + -0.05 mm.
In one embodiment of the present invention, between the step S2 and the step S3, further comprising judging whether a foreign matter exists on the welding surface of the pole, if so, suspending the welding; if not, go to step S3.
In one embodiment of the present invention, after step S3, further includes determining whether the welding operation duration is within the theoretical value of the control range, if yes, determining that the welding is qualified; if not, judging that the welding is unqualified.
In one embodiment of the invention, the method further comprises the steps of:
s4, respectively measuring the distance of four points of the pole, judging whether the distance measurement obtains four distance measurement values at the same time, and if so, performing step S5; if not, suspending welding;
s5, judging whether the difference value between the four ranging values and the second reference value is within a fourth preset value, if so, performing step S6; if not, suspending welding;
s6, judging whether the difference between the theoretical compensation value and the actual compensation value of the vertical distance between the pole welding surface and the laser emitting head is within a fifth preset value, and if so, compensating the Z-axis coordinate value of the motion track of the laser emitting head so that the focal point position of the laser emitting head always coincides with the pole welding surface in the welding process; if not, the welding is paused.
In one embodiment of the present invention, the theoretical compensation value of the vertical distance between the post welding surface and the laser emitting head is calculated as follows:
k＝L-(Lmax+Lmin)/2
wherein: k is a theoretical compensation value of the vertical distance between the welding surface of the pole and the laser emission head, L is a distance measurement value corresponding to the defocus amount, lmax is a maximum measurement value of the distance measurement value corresponding to the defocus amount, and Lmin is a minimum design value of the distance measurement value corresponding to the defocus amount.
In one embodiment of the present invention, the actual compensation value of the vertical distance between the post welding surface and the laser exit head is calculated as follows:
Δ＝Z 2 -Z 1
wherein: delta is the actual compensation value of the vertical distance between the welding surface of the pole and the laser emergent head, Z 1 And Z 2 The coordinate values of the Z axis before and after compensation are respectively obtained.
In one embodiment of the present invention, the fourth preset value is 0.15 mm.+ -. 0.05mm and the fifth preset value is 1 mm.+ -. 0.05mm.
In one embodiment of the present invention, the method further includes step S7 of determining whether the deviation between the actual defocus amount and the defocus amount setting value is within a sixth preset value, and if yes, determining that the welding is acceptable; if not, the welding is paused.
The invention also provides a system for realizing real-time compensation in the welding process of the battery pole, which comprises:
the laser emergent head is used for emergent welding laser;
the image acquisition module is used for capturing image information of the welding surface and extracting features from the image information of the polar column;
the control module is used for calculating the center point coordinate of the pole, judging whether the installation gap of the pole is within a first preset value, judging whether the difference value between the center coordinate of the pole and a first reference value is within a second preset value and judging whether the difference value between a theoretical compensation value and an actual compensation value between the center coordinate value of a welding surface of the pole and the coordinate value of a laser emitting head is within a third preset value;
the moving module is used for compensating the coordinate value of the circle center of the movement track of the laser emergent head so that the circle center of the movement track of the laser emergent head always coincides with the circle center of the polar column in the welding process.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the method for realizing the real-time compensation in the welding process of the battery pole column compensates the height and the position of the laser emergent head in real time, reduces welding errors, avoids the problems that the welding focal length cannot be flexibly changed due to fixation, and the appearance effect of a welding seam and the deviation of the welding seam are poor due to the difference of raw materials, reduces the rejection rate of products, and improves the welding yield.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
Fig. 1 is a block flow diagram of the pole welding plane correction of the present invention.
Fig. 2 is a block flow diagram of the correction of the post weld defocus amount in the present invention.
Fig. 3 is a schematic structural view of a welding device for battery poles in the present invention.
Fig. 4 is a side view of a welding apparatus for a battery post in accordance with the present invention.
Description of the specification reference numerals: 1. a visual positioning light source; 2. a visual positioning camera; 3. a laser welding head; 4. a displacement sensor; 5. an X-axis linear module; 6. a Y-axis linear module; 7. a Z-axis straight line module.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
The foregoing and other features, aspects and advantages of the present invention will become more apparent from the following detailed description of the embodiments, read in conjunction with the accompanying drawings. The directional terms mentioned in the following embodiments are, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, directional terminology is used for the purpose of illustration and is not intended to be limiting of the invention, and furthermore, like reference numerals refer to like elements throughout the embodiments.
Example 1
With reference to fig. 1 and 2, a method for implementing real-time compensation in a welding process of a battery post includes the following steps:
capturing image information of the welding surface of the polar column through the image acquisition component, calculating a coordinate value of the center of the welding surface of the polar column, compensating a coordinate value of the center of the moving track of the laser emitting head according to the difference value between the coordinate value of the center of the welding surface of the polar column and the coordinate value of the laser emitting head so that the center of the moving track of the laser emitting head always coincides with the center of the polar column in the welding process,
the method comprises the steps of,
the vertical height from the pole welding surface to the displacement sensor is obtained through the displacement sensor, and the height of the laser emergent head is compensated according to the vertical height difference between the laser emergent head and the displacement sensor, so that the pole welding surface is always positioned at the focal length of the laser welding beam in the welding process.
Specifically, the method comprises the following steps:
s1, acquiring image information of a welding surface of a pole, extracting characteristics of the image information of the pole, calculating coordinates of a central point of the pole, judging whether an installation gap of the pole is within a first preset value, and if so, performing a step S2; if not, suspending welding;
s2, judging whether the difference value between the center coordinate of the pole and the first reference value is within a second preset value, if so, performing a step S3; if not, suspending welding;
s3, judging whether a difference value between a theoretical compensation value and an actual compensation value between the coordinate value of the center of the welding surface of the pole and the coordinate value of the laser emitting head is within a third preset value, and if so, compensating the coordinate value of the center of the moving track of the laser emitting head so that the center of the moving track of the laser emitting head always coincides with the center of the pole in the welding process; if not, the welding is paused.
S4, respectively measuring the distance of four points of the pole, judging whether the distance measurement obtains four distance measurement values at the same time, and if so, performing step S5; if not, suspending welding;
s5, judging whether the difference value between the four ranging values and the second reference value is within a fourth preset value, if so, performing step S6; if not, suspending welding;
s6, judging whether the difference between the theoretical compensation value and the actual compensation value of the vertical distance between the pole welding surface and the laser emitting head is within a fifth preset value, and if so, compensating the Z-axis coordinate value of the motion track of the laser emitting head so that the focal point position of the laser emitting head always coincides with the pole welding surface in the welding process; if not, the welding is paused.
S7, judging whether the deviation between the actual defocus amount and the defocus amount set value is within a sixth preset value, and if so, judging that the welding is qualified; if not, judging that the welding is unqualified.
The embodiment compensates the height and the position of the laser emergent head in real time, reduces welding errors, and avoids the problems that the welding focal length cannot be flexibly changed due to fixation, and the appearance effect of a welding seam is poor, the welding seam is deviated and the like due to the difference of raw materials.
In this embodiment, the calculation formula of the theoretical compensation value between the center coordinate value of the pole welding surface and the coordinate value of the laser emitting head is as follows:
ΔX 1 ＝A 1 -A 2
ΔY 1 ＝B 1 -B 2
wherein: ΔX 1 To theoretically compensate the coordinate value of the X axis, A 1 Is the coordinate value of the X axis of the center of the pole, A 2 As coordinate value of reference X-axis, deltaY 1 To theoretically compensate the coordinate value of the Y axis, B 1 B is the coordinate value of the Y axis of the center of the pole 2 Is the coordinate value of the reference X-axis.
The calculation formula of the actual compensation value between the center coordinate value of the pole welding surface and the coordinate value of the laser emergent head is as follows:
ΔX 2 ＝X 2 -X 1
ΔY 2 ＝Y 2 -Y 1
wherein: ΔX 2 For the coordinate value of the X-axis actually compensated, X 1 And X 2 Respectively compensating the coordinate values of the X-axis before and after the delta Y 2 For the coordinate value of the Y-axis actually compensated, Y 1 And Y 2 The coordinate values of the Y axis before and after compensation are respectively obtained.
In this embodiment, the first preset value is 0.15mm±0.05mm; the second preset value is 1mm plus or minus 0.05mm; the third preset value is 0.05mm + -0.05 mm.
Then:
step S1, acquiring image information of a welding surface of a pole, extracting characteristics of the image information of the pole, calculating coordinates of a central point of the pole, judging whether the installation gap of the pole is less than or equal to 0.15mm, and if yes, performing step S2; if not, suspending welding;
step S2, judging whether the difference value between the center coordinates of the polar columns and the first reference value is less than or equal to 1mm, if yes, performing step S3; if not, suspending welding;
step S3 is to judge DeltaX 2 -ΔX 1 Whether less than or equal to + -1 mm and delta Y 2 -ΔY 1 If not more than +/-1 mm, compensating the motion rail of the laser emergent headThe circle center coordinate value of the trace ensures that the circle center of the motion trace of the laser emergent head always coincides with the circle center of the polar column in the welding process; if not, the welding is paused.
In other embodiments, between step S2 and step S3, it may further include determining whether a foreign object exists on the welding surface of the pole, if so, suspending the welding; if not, go to step S3.
In this embodiment, after step S3, further includes determining whether the welding operation duration is within the theoretical value of the control range, if yes, determining that the welding is qualified; if not, judging that the welding is unqualified. Wherein the theoretical value of the control range is +/-0.3 s.
In this embodiment, the theoretical compensation value of the vertical distance between the post welding surface and the laser emitting head is calculated as follows:
k＝L-(Lmax+Lmin)/2
wherein: k is a theoretical compensation value of the vertical distance between the welding surface of the pole and the laser emission head, L is a distance measurement value corresponding to the defocus amount, lmax is a maximum measurement value of the distance measurement value corresponding to the defocus amount, and Lmin is a minimum design value of the distance measurement value corresponding to the defocus amount.
In this embodiment, the calculation formula of the actual compensation value of the vertical distance between the post welding surface and the laser exit head is as follows:
Δ＝Z 2 -Z 1
wherein: delta is the actual compensation value of the vertical distance between the welding surface of the pole and the laser emergent head, Z 1 And Z 2 The coordinate values of the Z axis before and after compensation are respectively obtained.
In this embodiment, the fourth preset value is 0.15 mm.+ -. 0.05mm, the fifth preset value is 1 mm.+ -. 0.05mm, and the sixth preset value is 1 mm.+ -. 0.05mm.
In other embodiments, between the step S5 and the step S6, judging whether the distance measurement error value is less than or equal to +/-0.1 mm, if yes, performing the step S6; if not, the welding is paused.
Then the first time period of the first time period,
step S5, judging whether the difference value between the four ranging values and the second reference value is less than or equal to +/-0.2 mm, if yes, executing step S6; if not, suspending welding;
s6, judging whether delta-k is less than or equal to +/-0.1 mm, if yes, compensating a Z-axis coordinate value of a motion track of the laser emergent head so that the focal position of the laser emergent head always coincides with a pole welding surface in the welding process; if not, the welding is paused.
S7, judging whether the deviation between the actual defocusing amount and the defocusing amount set value is less than or equal to +/-1 mm, and if so, judging that the welding is qualified; if not, the welding is paused. Wherein, record the ranging value after the compensation as: complement x=point x ranging value+Δ, actual defocus amount= (lmax+lmin)/2+Δ.
It should be noted that the present invention is directed to the existing square pole, so four vertexes of the pole, that is, points with an angle of 90 degrees formed by intersecting two sides are generally selected, and point x refers to a ranging value of any one of four points a, b, c, d on the pole.
In all the above steps involving suspension of welding, suspension of welding may be determined directly as an unacceptable product, exiting the station, or suspension of welding may be a pop-up alarm and manual confirmation of whether an unacceptable product is present.
Example two
A first difference from the embodiment is that a method for realizing real-time compensation during welding of battery poles comprises the following steps: the image acquisition component is used for capturing the image information of the pole welding surface, calculating the center coordinate value of the pole welding surface, and compensating the center coordinate value of the movement track of the laser emitting head according to the difference value between the center coordinate value of the pole welding surface and the center coordinate value of the laser emitting head so that the center of the movement track of the laser emitting head always coincides with the center of the pole in the welding process. The specific steps are the same as steps S1 to S3 in the first embodiment, and will not be described here again.
Example III
A first difference from the embodiment is that a method for realizing real-time compensation during welding of battery poles comprises the following steps: the vertical height from the pole welding surface to the displacement sensor is obtained through the displacement sensor, and the height of the laser emergent head is compensated according to the vertical height difference between the laser emergent head and the displacement sensor, so that the pole welding surface is always positioned at the focal length of the laser welding beam in the welding process. The specific steps are the same as steps S4 to S7 in the first embodiment, and will not be described here again.
Example IV
Aiming at the method for realizing real-time compensation in the welding process of the battery pole provided by the embodiment, a system for realizing real-time compensation in the welding process of the battery pole is provided, which comprises the following steps:
the laser emergent head is used for emergent welding laser;
the image acquisition module is used for capturing image information of the welding surface and extracting features from the image information of the polar column;
the first control module is used for calculating the center point coordinate of the pole, judging whether the installation gap of the pole is within a first preset value, judging whether the difference value between the center coordinate of the pole and a first reference value is within a second preset value and judging whether the difference value between a theoretical compensation value and an actual compensation value between the center coordinate value of the welding surface of the pole and the coordinate value of the laser emitting head is within a third preset value;
the first moving module is used for compensating the circle center coordinate value of the movement track of the laser emergent head so that the circle center of the movement track of the laser emergent head always coincides with the circle center of the polar column in the welding process;
the displacement sensor module is used for respectively measuring the distance of four points of the pole;
the second control module is used for judging whether the ranging obtains four ranging values at the same time, judging whether the difference value between the four ranging values and the second reference value is within a fourth preset value, judging whether the difference value between the theoretical compensation value and the actual compensation value of the vertical direction distance between the pole welding surface and the laser emergent head is within a fifth preset value and judging whether the deviation between the actual defocusing amount and the defocusing amount set value is within a sixth preset value;
and the second moving module is used for compensating the Z-axis coordinate value of the motion track of the laser emergent head so that the focal position of the laser emergent head always coincides with the welding surface of the polar column in the welding process.
Example five
Aiming at the method for realizing real-time compensation in the welding process of the battery pole provided by the second embodiment, a system for realizing real-time compensation in the welding process of the battery pole is provided, comprising:
the laser emergent head is used for emergent welding laser;
the image acquisition module is used for capturing image information of the welding surface and extracting features from the image information of the polar column;
the first control module is used for calculating the center point coordinate of the pole, judging whether the installation gap of the pole is within a first preset value, judging whether the difference value between the center coordinate of the pole and a first reference value is within a second preset value and judging whether the difference value between a theoretical compensation value and an actual compensation value between the center coordinate value of the welding surface of the pole and the coordinate value of the laser emitting head is within a third preset value;
the first moving module is used for compensating the circle center coordinate value of the movement track of the laser emergent head so that the circle center of the movement track of the laser emergent head always coincides with the circle center of the polar column in the welding process.
Example six
Aiming at the method for realizing real-time compensation in the welding process of the battery pole provided by the third embodiment, a system for realizing real-time compensation in the welding process of the battery pole is provided, comprising:
the displacement sensor module is used for respectively measuring the distance of four points of the pole;
the second control module is used for judging whether the ranging obtains four ranging values at the same time, judging whether the difference value between the four ranging values and the second reference value is within a fourth preset value, judging whether the difference value between the theoretical compensation value and the actual compensation value of the vertical direction distance between the pole welding surface and the laser emergent head is within a fifth preset value and judging whether the deviation between the actual defocusing amount and the defocusing amount set value is within a sixth preset value;
and the second moving module is used for compensating the Z-axis coordinate value of the motion track of the laser emergent head so that the focal position of the laser emergent head always coincides with the welding surface of the polar column in the welding process.
Example seven
With reference to fig. 3 and 4, an apparatus for implementing real-time compensation in a welding process of a battery post includes:
a laser including a laser emitting head 3;
a laser range finder 4 for obtaining the vertical height from the pole welding surface to the displacement sensor;
a visual positioning camera 2 for capturing image information of the pole welding surface;
and the multi-axis linear motion module is used for driving any one of the laser emergent head 3, the laser range finder 4 and the vision positioning camera 2 to move to a designated position.
Preferably, a visual positioning light source 1 is arranged at the lens of the visual positioning camera 2, and the visual positioning light source 1 provides illumination, so that the detected pole welding surface can be clearly photographed by the visual positioning camera 2.
In this embodiment, the multi-axis linear motion module includes an X-axis linear module 5, a Y-axis linear module 6, and a Z-axis linear module 7,Z, where the Y-axis linear module 6 is fixed at the center of the platform, a transverse line for realizing left-right linear motion is an X-axis, a front-back linear motion is a Y-axis, and an up-down linear motion is a Z-axis.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (12)
1. The method for realizing real-time compensation in the welding process of the battery pole is characterized by comprising the following steps of:
s1, acquiring image information of a welding surface of a pole, extracting characteristics of the image information of the pole, calculating coordinates of a central point of the pole, judging whether an installation gap of the pole is within a first preset value, and if so, performing a step S2; if not, suspending welding;
s2, judging whether the difference value between the center coordinate of the pole and the first reference value is within a second preset value, if so, performing a step S3; if not, suspending welding;
s3, judging whether a difference value between a theoretical compensation value and an actual compensation value between the coordinate value of the center of the welding surface of the pole and the coordinate value of the laser emitting head is within a third preset value, and if so, compensating the coordinate value of the center of the moving track of the laser emitting head so that the center of the moving track of the laser emitting head always coincides with the center of the pole in the welding process; if not, the welding is paused.
2. The method for realizing real-time compensation in the welding process of battery poles according to claim 1, wherein the calculation formula of the theoretical compensation value between the center coordinate value of the welding surface of the pole and the coordinate value of the laser emitting head is as follows:
ΔX 1 ＝A 1 -A 2
ΔY 1 ＝B 1 -B 2
wherein: ΔX 1 To theoretically compensate the coordinate value of the X axis, A 1 Is the coordinate value of the X axis of the center of the pole, A 2 As coordinate value of reference X-axis, deltaY 1 To theoretically compensate the coordinate value of the Y axis, B 1 B is the coordinate value of the Y axis of the center of the pole 2 Is the coordinate value of the reference X-axis.
3. The method for realizing real-time compensation in the welding process of battery poles according to claim 1, wherein the calculation formula of the actual compensation value between the center coordinate value of the welding surface of the pole and the coordinate value of the laser emitting head is as follows:
ΔX 2 ＝X 2 -X 1
ΔY 2 ＝Y 2 -Y 1
wherein: ΔX 2 For the coordinate value of the X-axis actually compensated, X 1 And X 2 Respectively compensating the coordinate values of the X-axis before and after the delta Y 2 For the coordinate value of the Y-axis actually compensated, Y 1 And Y 2 The coordinate values of the Y axis before and after compensation are respectively obtained.
4. The method for realizing real-time compensation in a welding process of a battery post according to claim 1, wherein the first preset value is 0.15mm ± 0.05mm; the second preset value is 1mm plus or minus 0.05mm; the third preset value is 0.05mm + -0.05 mm.
5. The method for realizing real-time compensation in a welding process of a battery post according to claim 1, wherein between the step S2 and the step S3, further comprising judging whether foreign matters exist on the welding surface of the post, if so, suspending the welding; if not, go to step S3.
6. The method for realizing real-time compensation in the welding process of the battery pole according to claim 1, wherein after step S3, further comprising judging whether the welding operation duration is within the theoretical value of the control range, if so, judging that the welding is qualified; if not, judging that the welding is unqualified.
7. The method for realizing real-time compensation in a welding process of a battery post according to claim 1, further comprising the steps of:
s4, respectively measuring the distance of four points of the pole, judging whether the distance measurement obtains four distance measurement values at the same time, and if so, performing step S5; if not, suspending welding;
s5, judging whether the difference value between the four ranging values and the second reference value is within a fourth preset value, if so, performing step S6; if not, suspending welding;
s6, judging whether the difference between the theoretical compensation value and the actual compensation value of the vertical distance between the pole welding surface and the laser emitting head is within a fifth preset value, and if so, compensating the Z-axis coordinate value of the motion track of the laser emitting head so that the focal point position of the laser emitting head always coincides with the pole welding surface in the welding process; if not, the welding is paused.
8. The method for realizing real-time compensation in a welding process of a battery post according to claim 7, wherein a theoretical compensation value calculation formula of a vertical direction distance between a post welding surface and a laser emitting head is as follows:
k＝L-(Lmax+Lmin)/2
wherein: k is a theoretical compensation value of the vertical distance between the welding surface of the pole and the laser emission head, L is a distance measurement value corresponding to the defocus amount, lmax is a maximum measurement value of the distance measurement value corresponding to the defocus amount, and Lmin is a minimum design value of the distance measurement value corresponding to the defocus amount.
9. The method for realizing real-time compensation in a welding process of a battery post according to claim 7, wherein the calculation formula of the actual compensation value of the vertical distance between the welding surface of the post and the laser emitting head is as follows:
Δ＝Z 2 -Z 1
wherein: delta is the actual compensation value of the vertical distance between the welding surface of the pole and the laser emergent head, Z 1 And Z 2 The coordinate values of the Z axis before and after compensation are respectively obtained.
10. The method for realizing real-time compensation in a welding process of battery poles according to claim 7, wherein the fourth preset value is 0.15mm ± 0.05mm and the fifth preset value is 1mm ± 0.05mm.
11. The method for realizing real-time compensation in the welding process of the battery pole according to claim 7, further comprising the step of S7, judging whether the deviation between the actual defocus amount and the defocus amount set value is within a sixth preset value, if so, judging that the welding is qualified; if not, the welding is paused.
12. A system for implementing real-time compensation during welding of battery poles, comprising:
the laser emergent head is used for emergent welding laser;
the image acquisition module is used for capturing image information of the welding surface and extracting features from the image information of the polar column;
the control module is used for calculating the center point coordinate of the pole, judging whether the installation gap of the pole is within a first preset value, judging whether the difference value between the center coordinate of the pole and a first reference value is within a second preset value and judging whether the difference value between a theoretical compensation value and an actual compensation value between the center coordinate value of a welding surface of the pole and the coordinate value of a laser emitting head is within a third preset value;
the moving module is used for compensating the coordinate value of the circle center of the movement track of the laser emergent head so that the circle center of the movement track of the laser emergent head always coincides with the circle center of the polar column in the welding process.
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| CN202311299417.8A CN117206676A (en) | 2023-10-09 | 2023-10-09 | Method and system for realizing real-time compensation in welding process of battery pole |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117718593A (en) * | 2024-02-01 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Welding method and welding system for pole |
| CN117718593B (en) * | 2024-02-01 | 2024-06-11 | 宁德时代新能源科技股份有限公司 | Welding method and welding system for pole |
-
2023
- 2023-10-09 CN CN202311299417.8A patent/CN117206676A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117718593A (en) * | 2024-02-01 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Welding method and welding system for pole |
| CN117718593B (en) * | 2024-02-01 | 2024-06-11 | 宁德时代新能源科技股份有限公司 | Welding method and welding system for pole |
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