CN109093186B - Pole piece cutting system and method - Google Patents
Pole piece cutting system and method Download PDFInfo
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- CN109093186B CN109093186B CN201810972275.XA CN201810972275A CN109093186B CN 109093186 B CN109093186 B CN 109093186B CN 201810972275 A CN201810972275 A CN 201810972275A CN 109093186 B CN109093186 B CN 109093186B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a pole piece cutting system and a pole piece cutting method, which relate to the technical field of battery manufacturing, and the pole piece cutting system is used for cutting off a pole piece at a cutting position, wherein a pole lug welding reference line is arranged on the pole piece, and the pole piece cutting system comprises: a pole piece conveying mechanism and a cutter mechanism; the pole piece cutting system also comprises a controller, wherein the controller is used for controlling the start and stop of the pole piece conveying mechanism and controlling the cutter mechanism to cut off the pole piece at the cutting position; the pole piece cutting system also comprises a baseline sensor arranged on the front side of the cutter mechanism, and the baseline sensor is connected with the controller; when the base line sensor detects a pole lug welding reference line on the pole piece, the base line sensor sends a base line acquisition signal to the controller, when the controller receives the base line acquisition signal, the controller determines the position of the pole lug welding reference line according to the base line acquisition signal, the controller calculates the cutting position according to the position of the pole lug welding reference line, and then the cutter mechanism is controlled to cut off the pole piece at the cutting position.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a pole piece cutting system and a pole piece cutting method.
Background
In the manufacturing process of the battery, the manufacturing processes of the pole lug on the pole piece generally have two types: firstly, die cutting a pole piece to generate a pole lug (the pole lug is generally called as a pole piece self-contained pole lug); and secondly, welding the lug to the pole piece. For the mode of welding the tab to the pole piece, generally, a tab welding reference line is arranged beside the position of the pole piece to which the tab needs to be welded, and when the tab is welded, the data acquisition mechanism acquires the position information of the tab welding reference line and welds the tab to a target position according to the information.
In the preparation process of the battery core, the pole piece is required to be integrally cut off to form a pole segment with a certain length, and then the pole segment is wound. In general, the pole piece cutting position is determined based on the detected position of the tab.
However, in the prior art, when the tab cannot be detected or the tab is not welded on the pole piece, methods such as fuzzy cutting or fixed-point cutting are mainly adopted, that is, a trial cutting mode without reference points is adopted, the cutting precision is uncontrollable, the cutting error is large, the capacity error of the wound battery cell is also large, even the previous battery cell in winding can be scrapped, the yield is reduced, and economic loss is caused.
Disclosure of Invention
The invention aims to provide a pole piece cutting system and a pole piece cutting method, which can realize accurate cutting of a pole piece when the system cannot detect a pole lug or the pole lug is not welded on the pole piece.
In a first aspect, a pole piece cutting system provided in an embodiment of the present invention is a pole piece cutting system for cutting a pole piece at a cutting position, where a tab welding reference line is disposed on the pole piece, and the pole piece cutting system includes: the pole piece conveying mechanism is used for conveying the pole pieces to the cutter mechanism, and the cutter mechanism is used for cutting off the pole pieces;
the pole piece cutting system also comprises a controller, the controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism, and the controller is used for controlling the start and stop of the pole piece conveying mechanism and controlling the cutter mechanism to cut off the pole piece at a cutting position;
the pole piece cutting system also comprises a baseline sensor arranged on the front side of the cutter mechanism, and the baseline sensor is connected with the controller; when the base line sensor detects a pole lug welding reference line on the pole piece, the base line sensor sends a base line acquisition signal to the controller, when the controller receives the base line acquisition signal, the controller determines the position of the pole lug welding reference line according to the base line acquisition signal, the controller calculates the cutting position according to the position of the pole lug welding reference line, and then the cutter mechanism is controlled to cut off the pole piece at the cutting position.
Furthermore, a pole lug positioned at the rear side of the pole lug welding datum line is arranged on the pole piece;
the pole piece cutting system also comprises a pole ear sensor, the pole ear sensor is positioned between the baseline sensor and the cutter mechanism, and the pole ear sensor is connected with the controller; when the tab sensor detects a tab on the pole piece, the tab sensor sends a tab acquisition signal to the controller; when the controller receives the lug acquiring signal, the controller can determine the position of the lug according to the lug acquiring signal, and the controller calculates the cutting position according to the position of the lug so as to control the cutter mechanism to cut off the pole piece at the cutting position;
and when the controller receives the baseline acquisition signal and the tab acquisition signal, the controller calculates the cutting-off position according to the position of the tab.
Further, the pole piece cutting system further comprises an alarm mechanism, the alarm mechanism is connected with the controller, and when the controller receives the pole lug acquisition signal but does not receive the baseline acquisition signal, the controller sends an alarm signal to the alarm mechanism.
Further, the alarm mechanism comprises a loudspeaker and/or a warning light.
In a second aspect, a method for cutting a pole piece provided in an embodiment of the present invention is used for cutting a pole piece at a cutting position, where the pole piece is provided with a tab welding datum line, and includes the following steps:
providing a cutter mechanism for cutting off the pole piece and a pole piece conveying mechanism for conveying the pole piece to the cutter mechanism;
providing a controller, wherein the controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism, and is used for controlling the start and stop of the pole piece conveying mechanism and controlling the cutter mechanism to cut off the pole piece at a cutting position;
providing a baseline sensor for detecting a tab welding reference line, and sending a baseline acquisition signal to a controller when the baseline sensor detects the tab welding reference line;
when the controller receives the baseline acquisition signal, the controller determines the position of the tab welding reference line according to the baseline acquisition signal and calculates the cutting-off position according to the position of the tab welding reference line;
when the controller receives the baseline acquisition signal, the controller controls the pole piece conveying mechanism to stop;
the controller controls the cutter mechanism to cut off the pole piece at the cutting position.
Furthermore, a pole lug positioned at the rear side of the pole lug welding datum line is arranged on the pole piece;
the pole piece cutting method also comprises the following steps:
a tab sensor is arranged on the rear side of the baseline sensor and used for detecting a tab, and when the tab sensor detects the tab, the tab sensor sends a tab acquisition signal to the controller;
when the controller receives the lug acquiring signal, the controller determines the position of the lug according to the lug acquiring signal and calculates the cutting-off position according to the position of the lug;
when the controller receives the tab acquisition signal, the controller controls the pole piece conveying mechanism to stop;
the controller calculates the cutting position according to the position of the lug, and then controls the cutter mechanism to cut off the pole piece at the cutting position;
and when the controller receives the baseline acquisition signal and the tab acquisition signal, the controller calculates the cutting-off position according to the position of the tab.
And further comprising the step of providing an alarm mechanism, wherein when the controller receives the pole lug acquisition signal but does not receive the baseline acquisition signal, the controller sends an alarm signal to the alarm mechanism.
And further comprising the step that when the controller receives the pole lug acquisition signal but does not receive the baseline acquisition signal, the controller controls the pole piece conveying mechanism to stop so as to manually detect the pole piece.
Further, the pole piece is provided with a cutting line, the cutting line corresponds to a cutting position, when the controller receives an electrode lug acquisition signal, the distance from the electrode lug to the cutting line is preset to be A, and the distance from the initial position of the cutter mechanism to the electrode lug sensor is preset to be D; when the controller obtains the stop state of the pole piece and the cutter mechanism is ready to move to the cutting position, the distance between the pole lug and the pole lug sensor is X, and the calculation formula of the displacement Y1 of the cutter mechanism moving towards the pole lug is as follows: y1= D-a-X, and distances A, D, X and Y1 are both distances in the direction of travel of the pole piece.
Further, the pole piece is provided with cuts the line, it corresponds the cut-off position to cut the line, when the controller received utmost point ear and acquire the signal, it is A to predetermine utmost point ear distance to cutting the line, receive the base line when the controller and acquire the signal, but when not receiving utmost point ear and acquire the signal, it is E to predetermine cutter mechanism initial position to the distance of base line sensor, utmost point ear is B to the distance of utmost point ear welding datum line, the controller acquires the stop condition of pole piece, when cutter mechanism prepares to move to the cut-off position, the distance between utmost point ear welding datum line and the base line sensor is Z, then cutter mechanism is towards the computational formula of the displacement Y2 that utmost point ear removed: y2= E- (a + B) -Z, and distances A, B, E, Z and Y2 are both distances in the direction of travel of the pole piece.
The embodiment of the invention has the following beneficial effects:
the pole piece cutting system provided by the embodiment of the invention is used for cutting a pole piece at a cutting position, the pole piece is provided with a pole lug welding reference line, and the pole piece cutting system comprises: the pole piece conveying mechanism is used for conveying the pole pieces to the cutter mechanism, and the cutter mechanism is used for cutting off the pole pieces. The pole piece cutting system further comprises a controller, the controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism, and the controller is used for controlling the start and stop of the pole piece conveying mechanism and controlling the cutter mechanism to cut off the pole piece at a cutting-off position. The pole piece cutting system further comprises a baseline sensor arranged on the front side of the cutter mechanism, the baseline sensor is connected with the controller, and the baseline sensor can detect a tab welding reference line. When the base line sensor detects a pole lug welding reference line, the base line sensor sends a base line acquisition signal to the controller, when the controller receives the base line acquisition signal, the controller determines the position of the pole lug welding reference line according to the base line acquisition signal, the controller can calculate the cutting position by taking the position of the pole lug welding reference line as a reference, and then the cutter mechanism is controlled to cut off the pole piece at the cutting position. The pole piece cutting system provided by the embodiment of the invention can acquire the welding reference line of the pole lug through the baseline sensor, and then calculate the cutting position by taking the welding reference line of the pole lug as a reference, thereby providing a new positioning cutting method for the pole piece. Compared with the fuzzy cutting method in the prior art, the cutting position error obtained through the lug welding datum line is small, the precision is improved, the cutting precision is controllable, the consistency of the produced battery cell is guaranteed, the waste of pole pieces is reduced, the yield is improved, the production efficiency is improved, and the system can be suitable for cutting the pole pieces without lugs.
The pole piece cutting method provided by the embodiment of the invention is used for cutting off a pole piece at a cutting position, wherein the pole piece is provided with a pole lug welding reference line, and the method comprises the following steps: and providing a cutter mechanism for cutting off the pole piece and a pole piece conveying mechanism for conveying the pole piece to the cutter mechanism. The controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism and used for controlling the start and stop of the pole piece conveying mechanism and controlling the cutter mechanism to cut off the pole piece at a cutting-off position. Providing a baseline sensor for detecting a tab welding reference line, and sending a baseline acquisition signal to a controller when the baseline sensor detects the tab welding reference line; and when the controller receives the baseline acquisition signal, the controller determines the position of the tab welding reference line according to the baseline acquisition signal and calculates the cutting-off position according to the position of the tab welding reference line. When the controller receives the baseline acquisition signal, the controller controls the pole piece conveying mechanism to stop; the controller controls the cutter mechanism to cut off the pole piece at the cutting position. The pole piece cutting method provided by the embodiment of the invention is characterized in that a pole lug welding reference line on a pole piece is detected, and a cutting position is determined by taking the pole lug welding reference line as a reference, so that a novel positioning cutting method is provided for the pole piece. Compared with the fuzzy cutting method in the prior art, the cutting position error obtained through the lug welding datum line is small, the precision is improved, the cutting precision is controllable, the consistency of the produced battery cell is guaranteed, the waste of pole pieces is reduced, the yield is improved, the production efficiency is improved, and the method can be suitable for cutting the pole pieces without lugs.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a pole piece cutting system provided in an embodiment of the present invention with a controller and a pole piece conveying mechanism removed;
fig. 2 is a schematic diagram of a pole piece cutting system provided in an embodiment of the present invention, in which a cutting position is calculated based on a tab;
fig. 3 is a schematic diagram of a pole piece cutting system provided in an embodiment of the present invention, in which a cutting position is calculated based on a tab welding reference line.
Icon: 100-a cutter mechanism; 200-baseline sensor; 300-a tab sensor; 400-pole ear; 500-tab welding reference line; 600-cutting line.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood 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.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the pole piece cutting system provided in the embodiment of the present invention is configured to cut a pole piece at a cutting position, where the pole piece is provided with a tab welding datum line 500, and the pole piece cutting system includes: the pole piece conveying mechanism is used for conveying the pole piece to the cutter mechanism 100, and the cutter mechanism 100 is used for cutting off the pole piece. The pole piece cutting system further comprises a controller, the controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism 100, and the controller is used for controlling starting and stopping of the pole piece conveying mechanism and controlling the cutter mechanism 100 to cut off the pole pieces at the cutting-off positions. The pole piece cutting system further comprises a baseline sensor 200 arranged on the front side of the cutter mechanism 100, the baseline sensor 200 is connected with the controller, and the baseline sensor 200 can detect a tab welding reference line 500. When the baseline sensor 200 detects the tab welding reference line 500, the baseline sensor 200 sends a baseline acquisition signal to the controller, and when the controller receives the baseline acquisition signal, the controller determines the position of the tab welding reference line 500 according to the baseline acquisition signal, and the controller can calculate the cutting position by taking the position of the tab welding reference line 500 as a reference, and further control the cutter mechanism 100 to cut off the pole piece at the cutting position.
By using the pole piece cutting system provided by the embodiment of the invention, the pole lug welding reference line 500 can be acquired through the baseline sensor 200, and then the cutting position is calculated by taking the pole lug welding reference line 500 as a reference, so that a novel positioning cutting method is provided for the pole piece. Compared with the fuzzy cutting method in the prior art, the cutting position error obtained through the tab welding datum line 500 is small, the precision is improved, the cutting precision is controllable, the consistency of the produced battery cell is guaranteed, the waste of pole pieces is reduced, the yield is improved, the production efficiency is improved, and the system can be suitable for cutting the pole pieces of the electrode-less tab 400.
The pole piece cutting system provided by the embodiment of the invention can be suitable for cutting pole pieces which cannot detect the pole lugs 400, can detect the pole lug welding reference line 500 through the baseline sensor 200, and calculates the cutting position through the controller by taking the pole lug welding reference line 500 as a reference. The calculation of the cutting position is obtained by taking the tab welding reference line 500 as a reference, so that the pole piece obtained by cutting is good in consistency and controllable in cutting precision.
For the pole piece with the tab 400, the tab 400 is disposed on the pole piece behind the tab welding reference line 500. The pole piece cutting system can also be provided with a pole lug sensor 300, the pole lug sensor 300 can detect a pole lug 400 on the pole piece, the pole lug sensor 300 is positioned between the baseline sensor 200 and the cutter mechanism 100, and the pole lug sensor 300 is connected with the controller. The pole piece conveying mechanism drives the pole piece to move towards the cutter mechanism 100, and when the pole lug sensor 300 detects a pole lug 400 on the pole piece, the pole lug sensor 300 sends a pole lug acquisition signal to the controller; when the controller receives the tab acquiring signal, the controller can determine the position of the tab 400 according to the tab acquiring signal, and the controller calculates the cutting position according to the position of the tab 400, so as to control the cutter mechanism 100 to cut off the pole piece at the cutting position. And when the controller receives both the baseline acquisition signal and the tab acquisition signal, the controller calculates the cut-off position according to the position of the tab 400.
That is, in the pole piece with the tab 400, the tab welding reference line 500 and the tab 400 may be detected by the baseline sensor 200 and the tab sensor 300, respectively, when determining the cut position of the pole piece. When the tab sensor 300 does not detect the tab 400, the system can also determine the cutting position by taking the position of the tab welding reference line 500 as a reference, so that the problem that the pole piece is cut by a fuzzy cutting method with the accuracy incapable of being guaranteed is avoided, and the cutting accuracy of the pole piece is improved.
In the detection process, according to three different detection conditions of the tab sensor 300 and the baseline sensor 200, the following three different processing modes are respectively adopted: 1) the tab sensor 300 detects the tab 400, and the baseline sensor 200 detects the tab welding reference line 500, at this time, the cutting position is calculated by taking the position of the tab 400 as a reference; 2) the tab sensor 300 does not detect the tab 400, but the baseline sensor 200 detects the tab welding reference line 500, and at this time, the cutting position is calculated by taking the position of the tab welding reference line 500 as a reference; 3) the tab sensor 300 detects the tab 400, but the baseline sensor 200 does not detect the tab welding reference line 500, and at this time, the cut position is calculated with the position of the tab 400 as a reference.
That is, the controller calculates the cut position with reference to the position of the tab 400 as long as the tab sensor 300 detects the tab 400, and when the tab sensor 300 does not detect the tab 400 but the baseline sensor 200 detects the tab welding reference line 500, calculates the cut position with reference to the tab welding reference line 500. In the prior art, the tab 400 is not detected, a reference line cannot be selected, a fuzzy cutting mode can be adopted, and in the system provided by the application, when the tab 400 is not detected, the reference can still be established by using the tab welding reference line 500, the cutting position is accurately calculated, and compared with the fuzzy cutting mode, the system provided by the application has the advantages of lower cutting error of the pole piece and higher precision.
The baseline sensor 200 is a reflective sensor, such as a photosensor. The pole piece is provided with a coating area and a non-coating area, the color of the coating area is black, the non-coating area has metal luster, and the coating area and the non-coating area have color difference. In the present embodiment, the tab welding reference line 500 is a boundary between the coating region and the non-coating region, and in other embodiments, the tab welding reference line 500 has a linear structure that can be used as a reference line for easy detection and identification. The probe of the baseline sensor 200 faces the pole piece, the pole piece moves towards the cutter mechanism 100 under the driving of the pole piece conveying mechanism, and the baseline sensor 200 can detect the color change on the pole piece, so as to detect the tab welding datum line 500.
The tab sensor 300 is located between the baseline sensor 200 and the cutter mechanism 100, and the distances between the initial positions of the tab sensor 300, the baseline sensor 200, and the cutter mechanism 100 are all preset, so that the calculation of the moving distance of the cutter mechanism 100 is facilitated. Utmost point ear sensor 300 is correlation formula sensor, is located the avris of pole piece, and correlation formula sensor includes light transmitting terminal and light receiving terminal, and light transmitting terminal and light receiving terminal orientation are relative, and the pole piece is located between light transmitting terminal and the light receiving terminal, and when utmost point ear 400 passed through correlation formula sensor, utmost point ear 400 can block the light between light transmitting terminal and the light receiving terminal to make utmost point ear sensor 300 can detect utmost point ear 400.
When the tab sensor 300 detects the tab 400 and the baseline sensor 200 detects the tab welding reference line 500, the cut position is calculated based on the position of the tab 400, because the stability of the correlation sensor is higher than that of the photoelectric sensor, the cut position calculated based on the position of the tab 400 cuts the pole piece, the error of the pole piece obtained by cutting is low, and the accuracy is high, so the cut position is determined based on the position of the tab 400.
The method for calculating the cutting position of the pole piece comprises the following steps:
the pole piece is provided with a cutting line 600, the cutting line 600 corresponds to a cutting position, and the cutting line 600 is not an actual line but a virtual line corresponding to a position to be cut by the cutter mechanism 100.
As shown in fig. 2, the calculation formula for calculating the cutting position based on the position of the tab 400 is: y1= D-a-X, that is, after the pole piece conveying mechanism is stopped, the cutter mechanism 100 moves in the direction opposite to the pole piece conveying mechanism by a distance of Y1, and then the pole piece is cut. The distance from the tab 400 to the cutting line 600 is preset as a, the distance from the initial position of the cutter mechanism 100 to the tab sensor 300 is preset as D, and the position of the cutting line 600 is the cutting position in the process specification, wherein the values of a and D are known preset values in the process specification. The controller obtains the stop state of the pole piece, the distance between the pole lug 400 and the pole lug sensor 300 is X when the cutter is ready to move to the cutting position, and the value of X can be calculated by subtracting the value of the encoder at the moment when the pole lug 400 is detected by the pole lug sensor 300 from the current value of the encoder in the walking direction of the pole piece. A. D, X and Y1 are both distances in the direction of travel of the pole piece, where the direction of travel refers to the direction that coincides with the transport direction of the pole piece transport mechanism.
As shown in fig. 3, when the cutting position is calculated with the position of the tab welding reference line 500 as a reference, the calculation formula is as follows: y2= E- (a + B) -Z, that is, after the pole piece conveying mechanism is stopped, the cutter mechanism 100 moves in the direction opposite to the pole piece conveying mechanism by a distance of Y2, and then the pole piece is cut. The distance from the initial position of the cutter mechanism 100 to the baseline sensor 200 is preset as E, and the distance from the tab 400 to the tab welding reference line 500 is preset as B, wherein the values of B and E are known preset values specified by the process. The controller obtains the stop state of the pole piece, the cutter mechanism 100 continues to move towards the cutting datum line, the distance between the pole lug welding datum line 500 and the baseline sensor 200 is Z, and the Z value can be obtained by subtracting the value of the encoder at the moment when the baseline sensor 200 detects the pole lug welding datum line 500 from the current value of the encoder in the walking direction of the pole piece. Both distances A, B, E, Z and Y2 are distances in the direction of travel of the pole piece.
The causes of X and Z: when the tab 400 or the tab welding reference line 500 is detected, the controller controls the stop of the pole piece conveying mechanism, but the pole piece conveying mechanism does not stop instantly and generates a buffer distance forwards. For example, assuming that the pole piece transport mechanism is momentarily stopped, the values of X and Z are zero.
The pole piece cutting system comprises an alarm mechanism, the alarm mechanism is connected with a controller, and when the controller receives a pole lug acquisition signal but does not receive a base line acquisition signal, the controller sends an alarm signal to the alarm mechanism. The alarm mechanism may include a speaker and/or a warning light to alert the worker. The tab sensor 300 detects the tab 400, but the baseline sensor 200 does not detect the tab welding reference line 500, and at this time, the cutting position is calculated by taking the position of the tab 400 as a reference, but in this case, the suspected battery cell quality is abnormal, an alarm is given to stop, so that whether the battery cell is available or not is confirmed by a staff, if the battery cell is available, the battery cell is in a normal streamline, and if the battery cell is unavailable, the battery cell is automatically discharged.
Because the general process requirement of the welding and positioning precision of the pole lug 400 in the industry is +/-0.5mm, when the pole lug 400 is not detected, the cutting position is positioned and calculated by adopting the pole lug welding datum line 500, the cutting precision can be guaranteed to be +/-0.5mm, compared with the fuzzy cutting method in the prior art, the precision is improved, the cutting precision is controllable, and the consistency of the produced battery cell is guaranteed; the waste of pole pieces is reduced, the yield is improved, and the production efficiency is improved.
The pole piece cutting method provided by the embodiment of the invention is used for cutting a pole piece at a cutting position, and the pole piece is provided with a pole lug welding datum line 500, and comprises the following steps: a cutter mechanism 100 for cutting off the pole piece and a pole piece conveying mechanism for conveying the pole piece to the cutter mechanism 100 are provided. And a controller is also provided, and the controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism 100, and is used for controlling the start and stop of the pole piece conveying mechanism and controlling the cutter mechanism 100 to cut off the pole piece at the cutting position. Providing a baseline sensor 200 for detecting the tab welding reference line 500, and sending a baseline acquisition signal to the controller when the baseline sensor 200 detects the tab welding reference line 500; when the controller receives the baseline acquisition signal, the controller determines the position of the tab welding reference line 500 according to the baseline acquisition signal, and calculates the cutting-off position according to the position of the tab welding reference line 500. When the controller receives the baseline acquisition signal, the controller controls the pole piece conveying mechanism to stop; the controller controls the cutter mechanism 100 to cut the pole piece at the cutting position. The pole piece cutting method provided by the embodiment of the invention is characterized in that the pole piece welding reference line 500 on the pole piece is detected, and the cutting position is determined by taking the pole lug welding reference line 500 as a reference, so that a novel positioning cutting method is provided for the pole piece. Compared with the fuzzy cutting method in the prior art, the cutting position error obtained through the tab welding datum line 500 is small, the precision is improved, the cutting precision is controllable, the consistency of the produced battery cell is guaranteed, the waste of pole pieces is reduced, the yield is improved, the production efficiency is improved, and the method can be suitable for cutting the pole pieces of the electrode-less tab 400.
It should be noted that the pole piece cutting method provided by the embodiment of the present invention may calculate the cutting position by only adopting the tab welding reference line 500, rather than detecting the tab 400. Through the detection of the pole lug welding reference line 500, the cutting position is calculated according to the position of the pole lug welding reference line 500, and a new mode is provided for the determination of the cutting position of the pole piece. The electrode plate can be applied to a pole plate with a pole lug 400 and can also be applied to a pole plate without the pole lug 400.
For the pole piece with the tab 400, the tab 400 is disposed on the pole piece behind the tab welding reference line 500. The pole piece cutting method also comprises the steps that a pole ear sensor 300 is arranged at the rear side of the baseline sensor 200 and used for detecting the pole piece by the pole ear sensor 300, and if the pole ear sensor 300 detects a pole ear 400, the pole ear sensor 300 sends a pole ear acquisition signal to the controller; when the controller receives the tab acquisition signal, the controller determines the position of the tab 400 according to the tab acquisition signal and calculates the cut-off position according to the position of the tab 400; when the controller receives the tab acquisition signal, the controller controls the pole piece conveying mechanism to stop; the controller calculates the cutting position according to the position of the lug 400, and then controls the cutter mechanism 100 to cut off the pole piece at the cutting position; and when the controller receives both the baseline acquisition signal and the tab acquisition signal, the controller calculates the cut-off position according to the position of the tab 400.
That is, in the pole piece with the tab 400, the tab welding reference line 500 and the tab 400 may be detected by the baseline sensor 200 and the tab sensor 300, respectively, when determining the cut position of the pole piece. When the tab sensor 300 does not detect the tab 400, the method can also determine the cutting position by taking the position of the tab welding reference line 500 as a reference, so that the problem that the pole piece is cut by a fuzzy cutting method with uncertain precision is avoided, and the cutting precision of the pole piece is improved.
In the detection process, according to three different detection conditions of the tab sensor 300 and the baseline sensor 200, the following three different processing modes are respectively adopted: 1) the tab sensor 300 detects the tab 400, and the baseline sensor 200 detects the tab welding reference line 500, at this time, the cutting position is calculated by taking the position of the tab 400 as a reference; 2) the tab sensor 300 does not detect the tab 400, but the baseline sensor 200 detects the tab welding reference line 500, and at this time, the cutting position is calculated by taking the position of the tab welding reference line 500 as a reference; 3) the tab sensor 300 detects the tab 400, but the baseline sensor 200 does not detect the tab welding reference line 500, and at this time, the cut position is calculated with the position of the tab 400 as a reference.
And the controller sends out an alarm signal when receiving the pole lug acquisition signal but not receiving the baseline acquisition signal. The tab sensor 300 detects a tab 400, but the baseline sensor 200 does not detect a tab welding baseline 500, at this time, the cutting position is calculated by taking the position of the tab 400 as a reference, but the quality of the battery core is suspected to be abnormal, the battery is alarmed and stopped to ensure that whether the battery core is available or not, if the battery core is available, the battery core is in a normal streamline, and if the battery core is unavailable, the battery core is automatically discharged.
The cutter mechanism 100 returns to the initial position after cutting the pole piece each time, which facilitates the calculation of the next cutting position.
As shown in fig. 2, the calculation formula for calculating the cutting position based on the position of the tab 400 is: y1= D-a-X, that is, after the pole piece conveying mechanism is stopped, the cutter mechanism 100 moves in the direction opposite to the pole piece conveying mechanism by a distance of Y1, and then the pole piece is cut. The distance from the tab 400 to the cutting line 600 is preset as a, the distance from the initial position of the cutter mechanism 100 to the tab sensor 300 is preset as D, and the position of the cutting line 600 is the cutting position in the process specification, wherein the values of a and D are known preset values in the process specification. The controller obtains the stop state of the pole piece, the distance between the pole lug 400 and the pole lug sensor 300 is X when the cutter is ready to move to the cutting position, and the value of X can be calculated by subtracting the value of the encoder at the moment when the pole lug 400 is detected by the pole lug sensor 300 from the current value of the encoder in the walking direction of the pole piece. A. D, X and Y1 are both distances in the direction of travel of the pole piece, where the direction of travel refers to the direction that coincides with the transport direction of the pole piece transport mechanism.
As shown in fig. 3, when the cutting position is calculated with the position of the tab welding reference line 500 as a reference, the calculation formula is as follows: y2= E- (a + B) -Z, that is, after the pole piece conveying mechanism is stopped, the cutter mechanism 100 moves in the direction opposite to the pole piece conveying mechanism by a distance of Y2, and then the pole piece is cut. The distance from the initial position of the cutter mechanism 100 to the baseline sensor 200 is preset as E, and the distance from the tab 400 to the tab welding reference line 500 is preset as B, wherein the values of B and E are known preset values specified by the process. The controller obtains the stop state of the pole piece, the cutter mechanism 100 continues to move towards the cutting datum line, the distance between the pole lug welding datum line 500 and the baseline sensor 200 is Z, and the Z value can be obtained by subtracting the value of the encoder at the moment when the baseline sensor 200 detects the pole lug welding datum line 500 from the current value of the encoder in the walking direction of the pole piece. Both distances A, B, E, Z and Y2 are distances in the direction of travel of the pole piece.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a system is decided to pole piece for cut off a pole piece in a cutting position department, be provided with utmost point ear welding datum line on the pole piece, its characterized in that includes: the pole piece conveying mechanism is used for conveying the pole pieces to the cutter mechanism, and the cutter mechanism is used for cutting off the pole pieces;
the pole piece cutting system also comprises a controller, the controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism, and the controller is used for controlling the start and stop of the pole piece conveying mechanism and controlling the cutter mechanism to cut off the pole piece at the cutting position;
the pole piece cutting system also comprises a baseline sensor arranged on the front side of the cutter mechanism, and the baseline sensor is connected with the controller; when the baseline sensor detects the tab welding reference line on the pole piece, the baseline sensor sends a baseline acquisition signal to the controller, when the controller receives the baseline acquisition signal, the controller determines the position of the tab welding reference line according to the baseline acquisition signal, and the controller calculates the cutting position according to the position of the tab welding reference line, so as to control the cutter mechanism to cut off the pole piece at the cutting position.
2. The pole piece deciding system of claim 1, wherein a pole tab is disposed on the pole piece behind the pole tab welding reference line;
the pole piece cutting system also comprises a pole lug sensor, the pole lug sensor is positioned between the baseline sensor and the cutter mechanism, and the pole lug sensor is connected with the controller; when the tab sensor detects a tab on the pole piece, the tab sensor sends a tab acquisition signal to the controller; when the controller receives the lug acquiring signal, the controller can determine the position of the lug according to the lug acquiring signal, and the controller calculates the cutting position according to the position of the lug so as to control the cutter mechanism to cut off the pole piece at the cutting position;
and when the controller receives the baseline acquisition signal and the lug acquisition signal, the controller calculates the cutting-off position according to the position of the lug.
3. The pole piece cutting system according to claim 2, further comprising an alarm mechanism, wherein the alarm mechanism is connected to the controller, and when the controller receives the tab acquisition signal but does not receive the baseline acquisition signal, the controller sends an alarm signal to the alarm mechanism.
4. The pole piece severing system of claim 3, wherein the alarm mechanism comprises a speaker and/or a warning light.
5. A pole piece cutting method is used for cutting a pole piece at a cutting position, the pole piece is provided with a pole lug welding datum line, and the pole piece cutting method is characterized by comprising the following steps:
providing a cutter mechanism for cutting off the pole piece and a pole piece conveying mechanism for conveying the pole piece to the cutter mechanism;
providing a controller, wherein the controller is respectively connected with the pole piece conveying mechanism and the cutter mechanism, and is used for controlling the start and stop of the pole piece conveying mechanism and the cutting of the cutter mechanism at the cutting position to cut off the pole piece;
providing a baseline sensor for detecting the tab welding reference line, and sending a baseline acquisition signal to the controller when the baseline sensor detects the tab welding reference line;
when the controller receives the baseline acquisition signal, the controller determines the position of the tab welding reference line according to the baseline acquisition signal and calculates the cutting-off position according to the position of the tab welding reference line;
when the controller receives the baseline acquisition signal, the controller controls the pole piece conveying mechanism to stop;
the controller controls the cutter mechanism to cut off the pole piece at the cutting position.
6. The pole piece cutting method according to claim 5, wherein a pole tab located behind the pole tab welding reference line is provided on the pole piece;
the pole piece cutting method further comprises the following steps:
a tab sensor is arranged on the rear side of the baseline sensor and used for detecting the tab, and when the tab sensor detects the tab, the tab sensor sends a tab acquisition signal to the controller;
when the controller receives the lug acquiring signal, the controller determines the position of the lug according to the lug acquiring signal and calculates the cutting-off position according to the position of the lug;
when the controller receives the lug acquisition signal, the controller controls the pole piece conveying mechanism to stop;
the controller calculates the cutting position according to the position of the lug, and then controls the cutter mechanism to cut off the pole piece at the cutting position;
and when the controller receives the baseline acquisition signal and the lug acquisition signal, the controller calculates the cutting-off position according to the position of the lug.
7. The pole piece cutting method according to claim 6, further comprising the step of providing an alarm mechanism, wherein when the controller receives the tab acquisition signal but does not receive the baseline acquisition signal, the controller sends an alarm signal to the alarm mechanism.
8. The pole piece cutting method according to claim 7, further comprising the step of controlling the pole piece conveying mechanism to stop and manually detecting the pole piece when the controller receives the pole lug acquisition signal but does not receive the baseline acquisition signal.
9. The pole piece cutting method according to claim 6, wherein the pole piece is provided with a cutting line, the cutting line corresponds to the cutting position, when the controller receives the tab acquisition signal, the distance from the tab to the cutting line is preset to be A, and the distance from the initial position of the cutter mechanism to the tab sensor is preset to be D; when the controller obtains a pole piece stop state and the cutter mechanism is ready to move to a cutting position, the distance between the pole lug and the pole lug sensor is X, and a calculation formula of a displacement Y1 of the cutter mechanism moving towards the pole lug is as follows: y1= D-a-X, the distances A, D, X and Y1 both being distances in the direction of travel of the pole piece.
10. The pole piece cutting method according to claim 6, wherein the pole piece is provided with a cutting line, the cutting line corresponds to the cutting position, when the controller receives the tab acquisition signal, it is preset that the tab arrives the distance of the cutting line is A, when the controller receives the baseline acquisition signal, but does not receive the tab acquisition signal, it is preset that the cutter mechanism initial position arrives the distance of the baseline sensor is E, the tab arrives the distance of the tab welding reference line is B, the controller acquires the stop state of the pole piece, the cutter mechanism prepares to move to when the cutting position, the tab welding reference line with the distance between the baseline sensors is Z, then the cutter mechanism moves towards the calculation formula of the displacement Y2 of the tab movement is: y2= E- (a + B) -Z, the distances A, B, E, Z and Y2 both being distances in the direction of travel of the pole piece.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111906370B (en) * | 2019-05-10 | 2021-12-14 | 无锡先导智能装备股份有限公司 | Fly-cutting mechanism and fly-cutting method |
| CN110329832B (en) * | 2019-06-28 | 2021-06-08 | 广东利元亨智能装备股份有限公司 | Speed reduction cutting control method and control device |
| CN116532719A (en) * | 2022-01-26 | 2023-08-04 | 宁德时代新能源科技股份有限公司 | Pole piece cutting method and control system |
| CN114603633B (en) * | 2022-03-14 | 2024-03-26 | 北京深点视觉科技有限公司 | Die cutting control method and device, electronic equipment and storage medium |
| CN114905337B (en) * | 2022-04-29 | 2023-08-22 | 广东利元亨智能装备股份有限公司 | Pole piece cutting control method, device, controller and storage medium |
| CN115781380B (en) * | 2022-10-09 | 2023-10-20 | 宁德时代新能源科技股份有限公司 | Dust removal control method and device, winding system, controller and storage medium |
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