Dust removal device and laser cutting equipment

Abstract

The application discloses a dust removal device, comprising: a first dust removal part, the first dust removal part is provided with a first negative pressure cavity, and a first slit is formed through the first dust removal part to allow laser to pass through, the first negative pressure cavity is used for generating negative pressure and removing dust splashed by laser cutting through the first slit; a second dust removal part is arranged below the first dust removal part, a first spacing is formed between the second dust removal part and the first dust removal part to allow a pole piece to pass through, and the second dust removal part is used for removing dust falling on the back of the pole piece. The dust removal device provided by the application reduces the influence of negative pressure airflow on the pole piece, improves the effectiveness of dust removal, and improves the yield. The application further discloses a laser cutting device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing, in particular to a dust removal device and a laser cutting equipment. BACKGROUND

[0002] In the battery industry, with the gradual maturity of laser cutting technology, the laser can cut the required tab from the tab area. The traditional dust removal method is too simple, which is easy to cause the tab to vibrate, change the focal length of the laser cutting, and then make the heat affected zone of the tab larger, even burn the tab and cause the tab to be scrapped. SUMMARY

[0003] In order to overcome at least one of the defects of the prior art described above, the present application provides a dust removal device, which reduces the influence of negative pressure airflow on tab vibration, improves the effectiveness of dust removal, and improves the yield.

[0004] The technical scheme adopted by the present application to solve the problem is:

[0005] A dust removal device, comprising:

[0006] A first dust removal member, the first dust removal member has a first negative pressure cavity, and a first slit is formed through the first dust removal member for the laser to pass through, the first negative pressure cavity is used to generate negative pressure and remove the dust splashed by the laser cutting through the first slit;

[0007] A second dust removal member is located below the first dust removal member, and a first spacing exists between the second dust removal member and the first dust removal member for the tab to pass through, the second dust removal member is used to remove the dust falling on the back of the tab.

[0008] The dust removal device provided by the present application uses the first dust removal member to mainly control the dust splashed by the laser cutting in the relatively sealed first negative pressure cavity and removes the dust by negative pressure, and uses the second dust removal member to mainly remove the dust generated by the laser cutting and falling on the back (i.e. the lower surface) of the tab. The effect of the negative pressure airflow of the first dust removal member on the tab is limited to the first slit, and the rest of the tab is not affected by the airflow, so that the force of the negative pressure airflow of the first dust removal member on the upper surface of the tab is small. At the same time, the width of the first spacing can be controlled to make the tab pass through, so that the influence of the negative pressure airflow on the tab vibration can be reduced, the yield can be improved, and the negative pressure airflow can be more concentrated by using the first slit and the first spacing. The dust removal effect can also be better.

[0009] Further, the second dust removal member has a second negative pressure cavity, and a second slit is further arranged on the side of the second dust removal member facing the first dust removal member, the second slit is communicated with the second negative pressure cavity, and the second slit is located in a position corresponding to the first slit, and the second negative pressure cavity is used to generate negative pressure and suck the dust falling on the back surface of the pole piece through the second slit. In this way, the width of the second slit is controlled and corresponds to the position of the first slit, and the dust generated by laser cutting on the lower surface of the pole piece is just sucked into the second slit, so that the force of the negative pressure airflow of the second dust removal member acting on the lower surface of the pole piece is also small, so as to further reduce the influence of the negative pressure airflow on the pole piece.

[0010] Further, the second slit is located in the same vertical plane as the first slit.

[0011] Further, the second slit is located in the same vertical plane as the first slit.

[0012] Further, the second dust removal member further has a second negative pressure interface communicated with the second negative pressure cavity, and the second negative pressure interface is located on the side of the second dust removal member away from the first dust removal member.

[0013] Further, the first dust removal member has a first negative pressure interface communicated with the first negative pressure cavity, and the first negative pressure cavity further has a flow guide assembly, the flow guide assembly is capable of inputting airflow with a preset angle into the first negative pressure cavity, so as to guide the dust to the first negative pressure interface. In this way, the flow guide assembly can generate airflow with a specific angle, which can guide the dust splashed by laser cutting, further prevent the dust from spreading, and improve the dust removal efficiency.

[0014] Further, the first dust removal member includes at least two first wind covers arranged oppositely, each first wind cover is spaced apart to form the first slit, and the wind groove of the first wind cover encloses the first negative pressure cavity, and each first wind cover is provided with the first negative pressure interface and the flow guide assembly.

[0015] Further, the flow guide assembly includes a gas guide member and a gas input pipe for inputting positive pressure airflow, the gas guide member and the gas input pipe are communicated, the gas guide member is attached to the bottom wall of the first negative pressure cavity and adjacent to the first slit, and the gas guide member is provided with an inclined gas outlet communicated with the gas guide member and the first negative pressure cavity.

[0016] Further, the gas outlet is in the shape of a long slit, and the extension direction of the gas outlet corresponds to the extension direction of the first slit.

[0017] Further, the gas outlet includes a plurality of gas holes arranged in sequence, and the arrangement direction of the plurality of gas holes corresponds to the extension direction of the first slit.

[0018] Further, the third dust removal member is further included, and the third dust removal member is located at the same side of the first dust removal member and the second dust removal member, and the third dust removal member is provided with a third negative pressure cavity, and the third negative pressure cavity is used for sucking and removing the waste materials and dust generated by laser cutting.

[0019] Therefore, by the combination of the above-mentioned solutions, on the basis of dust removal by the first dust removal member and the second dust removal member, the dust removal effect of the third dust removal member mainly removes the waste materials and dust generated by laser cutting (for example, mainly for the tab side) to perform all-round precise dust removal, and the effectiveness of dust removal is further improved.

[0020] Further, the third negative pressure cavity is open towards the first dust removal member, and a second spacing exists between the third dust removal member and the first dust removal member for the laser to pass through.

[0021] Further, the third dust removal member is further provided with a support plate for supporting the pole piece, a cutting groove corresponding to the shape of the tab, and a third negative pressure interface for connecting the third negative pressure cavity, the support plate is located in the third negative pressure cavity, the cutting groove penetrates the top wall of the third negative pressure cavity and the support plate, and the two opposite side walls of the third negative pressure cavity are further provided with an avoiding groove for the pole piece to pass through, and the avoiding groove is located above the support plate. Therefore, the support plate can play a supporting role when the tab side is cut by laser, and prevent the tab to be cut from being bent, and the cutting groove can make the waste materials and dust generated by cutting fall into the third negative pressure cavity and be sucked away.

[0022] Further, the support plate divides the third negative pressure cavity into two sub-cavities arranged in an up-down manner, and the two sub-cavities are connected at one end towards the third negative pressure interface.

[0023] Further, the third dust removal member is provided with at least two, and the third dust removal member is oppositely arranged at the two opposite sides of the first dust removal member and the second dust removal member.

[0024] Based on the same concept, the application further discloses a laser cutting device, and the laser cutting device is applied with the dust removal device.

[0025] Further, the laser cutting device further includes a rack, a laser head, a driving roller and two negative pressure belts, the dust removal device, the laser head, the driving roller and the two negative pressure belts are arranged on the rack, the driving roller is located above at least one of the negative pressure belts for driving the pole piece to move on the negative pressure belt, and the dust removal device is located between the two negative pressure belts.

[0026] In summary, the dust removal device and the laser cutting device provided by the application have the following technical effects:

[0027] 1) good dust removal effect, high yield: the first dust removal part and the second dust removal part adopt negative pressure mode for targeted dust removal, and the first dust removal part and the second dust removal part have high relative sealing property, the force of the negative pressure airflow acting on the upper and lower surfaces of the pole piece is small, which can better reduce the shaking influence of the negative pressure airflow on the pole piece, improve the effectiveness of dust removal, improve the dust removal effect, improve the yield, and further improve the dust removal effect in combination with the dust removal effect of the third dust removal part;

[0028] 2) can guide dust removal: the flow guide assembly can generate airflow of a specific angle direction, the airflow can guide the dust sputtered by laser cutting, and the airflow is close to the laser cutting position of the pole piece, the guiding effect is good, which can further prevent dust diffusion and improve the dust removal efficiency;

[0029] 3) high processing quality of the tab side: the support plate can support the tab side during laser cutting to prevent the tab to be cut from being bent, and the cutting groove can make the waste and dust generated during cutting fall into the third negative pressure cavity and be sucked away, ensuring the processing quality of the tab side. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 it is a structure schematic view of the laser cutting equipment of the embodiment of the present application;

[0031] Figure 2 it is a structure schematic view of the laser cutting equipment of the embodiment of the present application after deleting the rack, the driving roller and the negative pressure belt;

[0032] Figure 3 it is a structure schematic view of the dust removal device of the embodiment of the present application;

[0033] Figure 4 it is an explosion schematic view of the dust removal device of the embodiment of the present application;

[0034] Figure 5 it is a structure schematic view of the connection of the first dust removal part and the flow guide assembly of the embodiment of the present application;

[0035] Figure 6 it is a structure schematic view of the flow guide assembly of the embodiment of the present application;

[0036] Figure 7 it is a structure schematic view of the third dust removal part of the embodiment of the present application;

[0037] Figure 8 it is a structure schematic view of the second dust removal part of the embodiment of the present application;

[0038] Figure 9 it is a cross-sectional view schematic view of the cooperation of the first dust removal part, the second dust removal part and the flow guide assembly of the embodiment of the present application.

[0039] In the drawings, the reference signs have the following meanings:

[0040] 1, dust removal device; 11, first dust removal part; 111, first negative pressure cavity; 112, first negative pressure interface; 113, first wind cover; 114, wind groove; 12, second dust removal part; 121, second negative pressure cavity; 122, second slit; 123, second negative pressure interface; 13, third dust removal part; 131, third negative pressure cavity; 132, support plate; 133, cutting groove; 134, third negative pressure interface; 135, avoiding groove; 14, drainage assembly; 141, air guide part; 1411, air outlet; 142, air conveying pipe; 15, first slit; 16, first interval; 17, second interval; 2, rack; 3, laser head; 4, driving roller; 5, negative pressure belt; 6, pole piece; 61, tab side. DETAILED DESCRIPTION

[0041] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0042] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0044] The present application discloses a kind of dust removal device 1, which is applied to laser cutting equipment, can carry out all-dimensional accurate dust removal to dust in the process of laser cutting pole piece 6, reduce the influence of dust to pole piece 6, improve the cutting quality of pole piece 6.

[0045] Referring to Figure 1 And Figure 2 Specifically, the laser cutting equipment includes dust removal device 1, rack 2, laser head 3, driving roller 4 and two negative pressure belts 5, dust removal device 1, laser head 3, driving roller 4 and two negative pressure belts 5 are all arranged on rack 2, driving roller 4 is located above at least one of negative pressure belt 5 to drive pole piece 6 to move on negative pressure belt 5, and dust removal device 1 is located between two negative pressure belts 5.

[0046] The laser head 3 can generate laser to cut the pole piece 6, and the laser head 3 and the pole piece 6 can be relatively displaced in at least one direction, so that the laser can be moved to the cutting position and perform the cutting operation.

[0047] Of course, the laser cutting path of the present application is not limited to a straight line, but can also be a curve or other set route. In the present embodiment, preferably, the laser head 3 can move linearly along the front-rear direction as shown in the figure, and in other embodiments, the laser head 3 can be externally connected to a three-axis or multi-axis movement structure, such as a robot, etc., for adjusting the position of the laser head 3, so that the laser head 3 is located at the appropriate cutting position and cutting height. Figure 1

[0048] The two negative pressure belts 5 have a spacing therebetween to accommodate the installation of the dust removal device 1 and to avoid laser, and can adsorb and support the pole piece 6. Preferably, the negative pressure belt 5 is a belt with a plurality of adsorption holes, by forming an air cavity inside the negative pressure belt 5 and connecting an external air extractor, so that when the pole piece 6 is placed on the negative pressure belt 5, the pole piece 6 is adsorbed and fixed on the negative pressure belt 5 by the formed air pressure difference.

[0049] The driving roller 4 serves as a power source to drive the pole piece 6 to move on the negative pressure belt 5, which can be used for conveying the pole piece 6, and also can be used for fine adjustment of the cutting position of the pole piece 6. Preferably, the driving roller 4 drives the pole piece 6 to move in a rolling friction manner.

[0050] Referring to Figures 2 to 4 , the dust removal device 1 includes a first dust removal member 11, a second dust removal member 12 and a third dust removal member 13, the second dust removal member 12 is located below the first dust removal member 11, and the third dust removal member 13 is located on the same side of the first dust removal member 11 and the second dust removal member 12; when applied to the laser cutting equipment, the first dust removal member 11 is located above the pole piece 6, the second dust removal member 12 is located below the pole piece 6, and the upper surface of the second dust removal member 12 can be supported on the pole piece 6, thereby supporting the pole piece 6 at the cutting position of the pole piece 6, and the arrangement direction of the third dust removal member 13 and the first dust removal member 11 or the arrangement direction of the third dust removal member 13 and the second dust removal member 12 is perpendicular to the moving direction of the pole piece 6, so that the third dust removal member 13 can correspond to the lug side 61 of the pole piece 6 to collect the generated waste and dust when the lug side 61 is cut.

[0051] It should be noted that the waste and dust collected by the third dust removal member 13 is not limited to the lug side 61, but can also be used to collect the waste and dust generated when the pole piece 6 is cut at other edges, that is, the third dust removal member 13 does not necessarily have to correspond to the lug side 61. Of course, it is better that the third dust removal member 13 corresponds to the lug side 61.

[0052] Referring to Figure 3 , Figure 4 ​、 Figure 7 and Figure 8 In the embodiment, importantly, the first dust removal member 11 has a first negative pressure cavity 111, and a first slit 15 is formed through the first dust removal member 11 for the laser to pass through, the first negative pressure cavity 111 is used to generate negative pressure and remove the dust splashed by the laser cutting through the first slit 15; the second dust removal member 12 has a first spacing 16 with the first dust removal member 11 for the pole piece 6 to pass through, and the second dust removal member 12 is used to remove the dust falling on the back surface (i.e. the lower surface) of the pole piece 6.

[0053] The second dust removal member 12 has a second negative pressure cavity 121, and a second slit 122 is further provided on the side of the second dust removal member 12 facing the first dust removal member 11 for the second negative pressure cavity 121 to communicate, specifically, the second slit 122 is located on the upper surface of the second dust removal member 12 for supporting the pole piece 6, the second slit 122 corresponds in position to the first slit 15, and the second negative pressure cavity 121 is used to generate negative pressure and remove the dust falling on the back surface of the pole piece 6 through the second slit 122.

[0054] The third dust removal member 13 is provided with a third negative pressure cavity 131 for removing the waste and dust generated by the laser cutting.

[0055] Through the above scheme, the first dust removal member 11 is mainly used to control the dust splashed by the laser cutting in the relatively sealed first negative pressure cavity 111 and remove the dust by negative pressure, the second dust removal member 12 is mainly used to remove the dust generated by the laser cutting on the lower surface of the pole piece 6, and the third dust removal member 13 is mainly used to remove the waste and dust cut by the laser (for example, mainly for the tab side 61), so as to perform all-round precise dust removal and improve the effectiveness of dust removal. On the other hand, the negative pressure airflow of the two first dust removal members 11 only acts on the first slit 15 of the pole piece 6, and the rest of the pole piece 6 is not affected by the airflow, so that the force of the negative pressure airflow of the two first dust removal members 11 acting on the upper surface of the pole piece 6 is small. At the same time, the width of the first spacing 16 can be controlled to allow only the pole piece 6 to pass through, and the width of the second slit 122 can be controlled to correspond in position to the first slit 15, so that the dust generated by the laser cutting on the lower surface of the pole piece 6 is just sucked into the second slit 122, and the force of the negative pressure airflow of the second dust removal member 12 acting on the lower surface of the pole piece 6 is also small. In this way, the influence of the negative pressure airflow on the pole piece 6 can be comprehensively and better reduced, and the yield can be improved. The use of various spacings and the second slit 122 can also make the negative pressure airflow more concentrated, and the dust removal effect can be better.

[0056] In addition, the traditional negative pressure dust removal structure is optimized to make the dust generation area relatively closed, which can reduce the diffusion of dust on one hand, and the relatively closed space is more conducive to dust removal on the other hand.

[0057] Of course, in some preferred embodiments, the dust removal can be performed only by the first dust removal member 11 and the second dust removal member 12.

[0058] Referring to Figure 5 and Figure 9 The first slit 15 on the first dust removal member 11 can be controlled to a smaller extent so as to enable the laser to pass through. Preferably, the first dust removal member 11 comprises two oppositely arranged first wind covers 113, which are single-side opening dust cover structures. The length direction of the first dust removal member 11 is perpendicular to the moving direction of the pole piece 6, and the two oppositely arranged first wind covers 113 are arranged along the moving direction of the pole piece 6 (it can also be understood that the width direction of the first wind cover 113 is parallel to the moving direction of the pole piece 6). Each first wind cover 113 is spaced apart to form the aforementioned first slit 15 (it can be understood that along the arrangement direction of the first wind cover 113, the two first wind covers 113 are spaced apart, thereby forming the aforementioned first slit 15 between them). The first wind cover 113 is provided with four first negative pressure interfaces 112 and a side opening air groove 114. Specifically, the air groove 114 is open toward one side of the width direction of the first wind cover 113, and two first negative pressure interfaces 112 are connected to the other side of the width direction of the first wind cover 113. Two first negative pressure interfaces 112 are connected to the top wall of the first wind cover 113, and the four first negative pressure interfaces 112 can all guide the air groove 114. After the two first wind covers 113 are oppositely arranged close to each other, the two air grooves 114 are enclosed to form the aforementioned first negative pressure cavity 111.

[0059] In use, the first negative pressure interface 112 can be connected to an external air extractor to form at least two negative pressure air flows in the two air grooves 114 constituting the first negative pressure cavity 111, respectively. The negative pressure air flows flow from the first slit 15 to the first negative pressure interfaces 112 of different first wind covers 113, respectively.

[0060] It should be noted that the size of the first wind cover 113 and the number and position of the first negative pressure interface 112 are not specifically limited, and can be designed according to the size requirements of the cut pole piece 6.

[0061] It is also to be noted that the number of the first wind covers 113 can also be three, four, five, etc. to form the first negative pressure cavity 111 by the wind slots 114, and the first wind covers 113 can be spaced to form the first slit 15 for the laser to pass through. As possible other examples: for example, the first wind covers 113 are three, the first one is longer, the second and the third are shorter, the second and the third are arranged on the same side of the longer one, the second and the third can be seamlessly connected (the wind slots 114 can be directly connected or isolated), and the second and the third are both spaced from the first one to form the first slit 15 for the laser to pass through; for example, the first wind covers 113 are four, arranged in pairs, the first wind covers 113 in the same group can be seamlessly connected, and the first wind covers 113 in different groups are spaced to form the first slit 15 for the laser to pass through.

[0062] In other preferred embodiments, the first dust removal member 11 can also be a one-piece structure, and the first negative pressure interface 112 for connecting the first negative pressure cavity 111 can be provided thereon. Of course, the number of the first negative pressure interface 112 is not limited, and it can meet the design requirements.

[0063] Referring to Figure 8 and Figure 9 , the trajectory of the first slit 15 should be adapted to the laser cutting path, and the path of the second slit 122 should also be adapted to the trajectory of the first slit 15 and the laser cutting path. Of course, there can be some deviations in length, such as the length of the second slit 122 can be shorter than the length of the first slit 15.

[0064] In this embodiment, the preferred laser head 3 can move linearly in the front-back direction as shown in Figure 1 , and further preferably, the second slit 122 and the first slit 15 are located in the same vertical plane.

[0065] In the embodiment, the length direction of the second dust removal member 12 is also perpendicular to the moving direction of the pole piece 6, specifically, the length of the second dust removal member 12 corresponds to the length of the first dust removal member 11, and the width of the second dust removal member 12 corresponds to the width of the first dust removal member 11; the second dust removal member 12 is also provided with two second negative pressure interfaces 123 for guiding the second negative pressure cavity 121, the two second negative pressure interfaces 123 are arranged along the length direction of the second dust removal member 12, wherein the second slit 122 is located on the side of the second dust removal member 12 facing the first dust removal member 11, and the second negative pressure interface 123 is located on the side of the second dust removal member 12 away from the first dust removal member 11. In this way, a basically sealed negative pressure space with only the second slit 122 open is formed.

[0066] Also need to be explained, the size of the second dust removal member 12, the number and position of the second negative pressure interface 123 are not specifically limited in the present application, and can be designed according to the size requirements of the cut pole piece 6.

[0067] In use, the second negative pressure interface 123 can also be connected to an external air extractor to form a negative pressure airflow in the second negative pressure cavity 121, which flows from the second slit 122 to the second negative pressure interface 123.

[0068] Through the combination of the above-mentioned solutions, the negative pressure airflow acting on the upper and lower surfaces of the pole piece 6 can be relatively more concentrated, ensuring good dust removal effect, thereby solving the problems of pole piece 6 shaking caused by too large dust removal opening and poor dust removal effect caused by dispersed negative pressure airflow.

[0069] Referring to Figure 9 , preferably, the second slit 122 is in the shape of an inverted trapezoid, so that the dust on the lower surface of the pole piece 6 can pass through the second slit 122 more easily.

[0070] In combination with Figure 5 , Figure 6 and Figure 9 , in the embodiment, preferably, the first negative pressure cavity 111 is also provided with a flow guide assembly 14, which can input a gas flow with a preset angle into the first negative pressure cavity 111, so as to guide the dust to the first negative pressure interface 112. It can be understood that the gas flow can guide the dust to the first negative pressure interface 112 on the top wall, or to the first negative pressure interface 112 on the side wall, which is not limited in the present application. In this way, the flow guide assembly 14 can generate a gas flow with a specific angle direction, which can guide the dust sputtered by laser cutting, further preventing the dust from spreading and improving the dust removal efficiency.

[0071] In combination with the first air scoop 113 described above, it is further preferred that each first air scoop 113 is provided with a flow guide assembly 14, at this time, the flow guide assembly 14 is located in the air chute 114.

[0072] Specifically, the air guiding assembly 14 comprises an air guide piece 141 and an air supply pipe 142 for inputting the positive pressure airflow, the air guide piece 141 and the air supply pipe 142 are in communication, the air guide piece 141 is attached to the bottom wall of the air chute 114 and adjacent to the first slit 15, and the air guide piece 141 is provided with an inclined air outlet 1411 (preferably, the air outlet 1411 can be inclined towards the first negative pressure interface 112 located on the side wall), the air outlet 1411 communicates the air guide piece 141 with the air chute 114, and it can also be understood that the air guide piece 141 is attached to the bottom wall of the first negative pressure cavity 111, and the air outlet 1411 communicates the air guide piece 141 with the first negative pressure cavity 111. Wherein, the air supply pipe 142 can be connected to external air supply equipment such as a blower, the positive pressure airflow generated by the blower is sequentially input into the first negative pressure cavity 111 through the air supply pipe 142, the air guide piece 141 and the air outlet 1411, and a specific angle airflow is formed according to the air outlet angle of the air outlet 1411. Since the air guide piece 141 is adjacent to the first slit 15, the airflow input by the air outlet 1411 is close to the laser cutting part of the pole piece 6, and the positive pressure airflow combines with the negative pressure airflow in the first negative pressure cavity 111 to better guide the dust sputtered by laser cutting.

[0073] Wherein, as some preferred examples, the specific form of the air outlet 1411 can be as follows:

[0074] (1) The air outlet 1411 is in the form of a long slit, and the extension direction of the air outlet 1411 corresponds to the extension direction of the first slit 15.

[0075] (2) The air outlet 1411 comprises a plurality of air holes arranged in sequence, and the arrangement direction of the plurality of air holes corresponds to the extension direction of the first slit 15. Wherein, the shape of the air hole can be cylindrical, rectangular, triangular, etc., and the present scheme does not limit the shape of the air hole.

[0076] Referring to Figure 3 and Figure 7 In the present embodiment, in the third dust removal piece 13, the third negative pressure cavity 131 on it is open towards the first dust removal piece 11, and there is a second distance 17 between the third dust removal piece 13 and the first dust removal piece 11 for the laser to pass through. Of course, the third negative pressure cavity 131 can also be open towards the second dust removal piece 12 at the same time, that is, the opening end of the third negative pressure cavity 131 covers one side of the third dust removal piece 13.

[0077] The third negative pressure cavity 131 with an open end is adopted, and the second spacing 17 is arranged, so as to facilitate the passage of the pole piece 6 through the third dust removal element 13, and the running path of the laser can also be transferred from the first slit 15 to the second spacing 17 and then moved to the third dust removal element 13 to cut the tab side 61 located in the third dust removal element 13. At the same time, since the cutting track of the tab side 61 is short, the amount of dust produced is limited, so that the third negative pressure cavity 131 can not be basically sealed. Of course, in some other embodiments, the third negative pressure cavity 131 can be basically sealed, for example, the length direction of one side of the first dust removal element 11 and the length direction of one side of the second dust removal element 12 are basically close to the opening end of the third negative pressure cavity 131, and only the second spacing 17 is reserved for the laser to pass through.

[0078] In order to realize the dust removal effect of the third dust removal element 13, the third dust removal element 13 can further be provided with a support plate 132, a cutting groove 133, a third negative pressure interface 134 and an avoidance groove 135. The support plate 132 is located in the third negative pressure cavity 131 to support the pole piece 6. The cutting groove 133 corresponds to the shape of the tab and can be provided with a plurality of cutting grooves 133. The cutting groove 133 penetrates the top wall of the third negative pressure cavity 131 and the support plate 132. The third negative pressure interface 134 is in communication with the third negative pressure cavity 131. The avoidance groove 135 penetrates the two opposite side walls of the third negative pressure cavity 131 to allow the pole piece 6 to pass through (in particular, the tab side 61 to pass through). The avoidance groove 135 is located above the support plate 132.

[0079] In this way, the laser is transferred from the second spacing 17 and moved to the cutting groove 133. The laser can move along the track of the cutting groove 133, so as to cut the tab with a corresponding shape. When the tab side 61 is cut, the waste and dust generated can fall into the third negative pressure cavity 131 through the cutting groove 133 on the support plate 132. The third negative pressure interface 134 can also be connected to an external air extractor to form a negative pressure airflow in the third negative pressure cavity 131, so as to suck away the waste and dust.

[0080] It can be known that, in order to avoid the laser from moving out of position during transition, the top wall of the third negative pressure cavity 131 can also be provided with a notch corresponding to the first slit 15. The length of the notch can be controlled within a relatively short range to meet the displacement gap of the laser during transition.

[0081] Through the combination of the above-mentioned solutions, the support plate 132 can play a supporting role when the laser cuts the tab side 61, preventing the tab to be cut from being bent. The waste and dust generated by cutting can fall into the third negative pressure cavity 131 through the cutting groove 133 and be sucked away, ensuring the dust removal effect.

[0082] Referring to Figure 7Preferably, the third negative pressure interface 134 is arranged in parallel with the support plate 132, so that in the third dust removal member 13, an airflow is generated from the opening end of the third negative pressure cavity 131 to the third negative pressure interface 134 through the upper and lower surfaces of the support plate 132, which is substantially parallel to the surface of the tab 6. The orderly removal of dust can be achieved by the directional movement of the parallel airflow. On the other hand, the parallel airflow does not interfere with the cutting process, ensuring the processing quality of the tab side 61.

[0083] More preferably, the support plate 132 divides the third negative pressure cavity 131 into two sub-cavities arranged in an up-down manner (not labeled in the figure), and the two sub-cavities are communicated at one end towards the third negative pressure interface 134. In this way, the upper and lower surfaces of the tab 6 are dusted by using the same third negative pressure interface 134, which simplifies the overall structure of the third dust removal member 13.

[0084] Of course, according to the different tabs 6 to be cut, in other embodiments, two third dust removal members 13 can be provided opposite to the two opposite sides of the first and second dust removal members 11 and 12, i.e., the arrangement direction of the two third dust removal members 13 is perpendicular to the moving direction of the tab 6, and the two third dust removal members 13 correspond to the two edges of the tab 6, respectively.

[0085] Of course, when there are multiple laser cutting paths, the number of first slits 15, the number of second slits 122, and the number of cutting grooves 133 on the third dust removal member 13 need to be increased correspondingly, or the number of third dust removal members 13 on the same side needs to be increased, to meet the design use.

[0086] In summary, the dust removal device and the laser cutting equipment provided by the present application have the following technical effects:

[0087] 1) Good dust removal effect and high yield: the first and second dust removal members 11 and 12 are both used in a negative pressure manner for targeted dust removal, and the first and second dust removal members 11 and 12 have high sealing performance, and the force of the negative pressure airflow acting on the upper and lower surfaces of the tab 6 is small, which can better reduce the shaking effect of the negative pressure airflow on the tab 6, improve the effectiveness of dust removal, improve the dust removal effect, and improve the yield. In combination with the dust removal effect of the third dust removal member 13, the dust removal effect can be further improved.

[0088] 2) Guided dust removal: the flow guide assembly 14 can generate airflow at a specific angle, which can guide the dust generated by laser cutting, and the airflow is close to the laser cutting position of the tab 6, so the guiding effect is good, which can further prevent dust from spreading and improve the dust removal efficiency.

[0089] 3) The processing quality of the tab side 61 is high: the support plate 132 can play a supporting role when laser cutting the tab side 61, preventing the tab to be cut from being bent, and the cutting groove 133 can make the waste and dust produced in the cutting fall into the third negative pressure cavity 131 and be sucked away, ensuring the processing quality of the tab side 61.

[0090] The technical means disclosed in the present application scheme is not limited to the technical means disclosed in the above-mentioned embodiments, but also includes the technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be considered as the protection scope of the present application.

Claims

1. A dust removal device characterized by comprising: The utility model relates to a laser cutting dust removal device for battery tab, which comprises: a first dust removal part (11) having a first negative pressure cavity (111) for generating negative pressure and sucking dust scattered by laser cutting through a first slit (15) on the first dust removal part (11); a second dust removal part (12) located below the first dust removal part (11) and having a first spacing (16) with the first dust removal part (11) for the passage of the battery tab (6), the second dust removal part (12) being used for sucking the dust falling on the back of the battery tab (6); a third dust removal part (13) located on the same side of the first dust removal part (11) and the second dust removal part (12), the third dust removal part (13) being provided with a third negative pressure cavity (131) for sucking the waste and dust generated by laser cutting; the third dust removal part (13) is further provided with a support plate (132) for supporting the battery tab (6) and a cutting groove (133) corresponding to the shape of the lug, the cutting groove (133) penetrating the top wall of the third negative pressure cavity (131) and the support plate (132), and the two opposite side walls of the third negative pressure cavity (131) are further provided with an avoiding groove (135) for the passage of the battery tab (6).

2. The dust extraction device of claim 1, wherein the second dust removal part (12) has a second negative pressure cavity (121), and the side of the second dust removal part (12) facing the first dust removal part (11) is further provided with a second slit (122) leading to the second negative pressure cavity (121), the second slit (122) corresponding in position to the first slit (15), and the second negative pressure cavity (121) being used for generating negative pressure and sucking the dust falling on the back of the battery tab (6) through the second slit (122).

3. The dust extraction device of claim 2, wherein the second slit (122) and the first slit (15) are located on the same vertical plane.

4. The dust extraction device of claim 2, wherein the second slit (122) has an inverted trapezoidal cross section.

5. The dust extraction device of claim 2, wherein the second dust removal part (12) is further provided with a second negative pressure interface (123) leading to the second negative pressure cavity (121), the second negative pressure interface (123) being located on the side of the second dust removal part (12) away from the first dust removal part (11).

6. The dust extraction device of claim 1, wherein the first dust removal part (11) is provided with a first negative pressure interface (112) leading to the first negative pressure cavity (111), and the first negative pressure cavity (111) is further provided with a flow guide assembly (14) capable of inputting airflow of a preset angle into the first negative pressure cavity (111) for guiding the dust to the first negative pressure interface (112).

7. The dust extraction device of claim 6, wherein The first dust removal member (11) comprises at least two oppositely arranged first wind covers (113), each of the first wind covers (113) is spaced apart to form the first slit (15), and a wind groove (114) of the first wind cover (113) encloses to form the first negative pressure cavity (111), each of the first wind covers (113) is provided with the first negative pressure interface (112) and the drainage assembly (14).

8. The dust extraction device of claim 6, wherein, The drainage assembly (14) comprises a gas guide member (141) and a gas supply pipe (142) for inputting positive pressure gas flow, the gas guide member (141) and the gas supply pipe (142) are in communication, the gas guide member (141) is attached to the bottom wall of the first negative pressure cavity (111) and adjacent to the first slit (15), and the gas guide member (141) is provided with an inclined gas outlet (1411), and the gas outlet (1411) communicates the gas guide member (141) with the first negative pressure cavity (111).

9. The dust extraction device of claim 8, wherein, The gas outlet (1411) is in the shape of a long strip, and the extension direction of the gas outlet (1411) corresponds to the extension direction of the first slit (15).

10. The dust extraction device of claim 8, wherein The gas outlet (1411) comprises a plurality of gas holes arranged in sequence, and the arrangement direction of the plurality of gas holes corresponds to the extension direction of the first slit (15).

11. The dust extraction device of any one of claims 1 to 10, wherein, The third negative pressure cavity (131) is open to the first dust removal member (11), and a second spacing (17) exists between the third dust removal member (13) and the first dust removal member (11) for the laser to pass through.

12. The dust extraction device of claim 11, wherein, The third dust removal member (13) is further provided with a third negative pressure interface (134) communicating the third negative pressure cavity (131), the support plate (132) is located in the third negative pressure cavity (131), and the avoiding groove (135) is located above the support plate (132).

13. The dust extraction device of claim 12, wherein, The support plate (132) divides the third negative pressure cavity (131) into two sub-cavities arranged in an up-down manner, and the two sub-cavities are in communication at one end facing the third negative pressure interface (134).

14. The dust extraction device of any one of claims 1 to 10, wherein, The third dust removal member (13) is provided with at least two, and the third dust removal member (13) is oppositely arranged at two opposite sides of the first dust removal member (11) and the second dust removal member (12).

15. A laser cutting apparatus, characterized by, The dust removal device as claimed in any one of claims 1 to 14 is applied.

16. The laser cutting apparatus of claim 15, wherein, Further comprising a rack (2), a laser head (3), a driving roller (4) and two negative pressure belts (5), the dust removal device, the laser head (3), the driving roller (4) and the two negative pressure belts (5) are arranged on the rack (2), the driving roller (4) is located above at least one of the negative pressure belts (5) for driving the pole piece (6) to move on the negative pressure belt (5), and the dust removal device is located between the two negative pressure belts (5).

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