A pole piece die cutting device

Abstract

The application discloses a kind of pole piece die cutting device, by the abutting pressure piece in abutting pressure position abutting pressure pole piece strip one opposite surface, while suction mechanism suction pole piece strip other opposite surface, two opposite surfaces of pole piece strip are acted on by force, ensure that pole piece strip middle part and edge are stationary or stable, avoid pole piece strip edge to shake under the action of pulse laser when cutting problem;The orthographic projection of abutting pressure piece on bearing table coincides with suction area, or, the orthographic projection of abutting pressure piece on bearing table is located in suction area, so that abutting pressure piece covers the opposite surface of pole piece with tab and external environment contact, prevent a large amount of smoke dust, waste gas particle from being attached to pole piece with tab during laser cutting process, to avoid pole piece with tab to be contaminated.Dust removal mechanism can remove the contaminant on cutting path, to reduce the contaminant or impurity around pole piece strip, reduce the pollution to pole piece strip, pole piece die cutting device and surrounding environment.

Description

Technical Field

[0001] This utility model generally relates to the field of battery technology, and in particular to an electrode die-cutting device. Background Technology

[0002] The electrode sheets required for battery manufacturing are cut using laser cutting, and the tabs on the electrode sheets are obtained through laser cutting.

[0003] Laser cutting typically generates a large amount of smoke and exhaust gas, which contaminates the surface of the electrode material and affects the quality of the cut electrode. At the same time, the edge of the electrode material vibrates continuously under the action of pulsed laser during cutting, affecting the cutting quality. Utility Model Content

[0004] This utility model provides an electrode die-cutting device, including: a support platform, a pressing member, and a laser-cut part.

[0005] The support platform is provided with an adsorption area, which is equipped with an adsorption mechanism for adsorbing the electrode strip onto the support surface of the adsorption area. A pressing member is used to press against the electrode strip when the adsorption mechanism adsorbs the electrode strip onto the support surface. The orthographic projection of the pressing member on the support platform coincides with or is located within the adsorption area. A laser die-cutting member is used to cut the electrode strip along the outer contour of the pressing member to obtain corresponding electrode sheets.

[0006] As an alternative, the pressing member is a heat-conducting pressing member used to absorb part of the heat from the edge of the electrode with tabs during the cutting process.

[0007] As an implementation method, the pressing member is provided with a temperature sensor, which is used to obtain the real-time temperature of the pressing member. The temperature sensor is arranged near the edge of the pressing member, and multiple temperature sensors are arranged circumferentially along the pressing member.

[0008] As an implementation method, a plurality of adsorption holes are formed on the adsorption region, and the adsorption holes adsorb the electrode strip through a vacuum pumping component. The adsorption holes and the vacuum pumping component together form the adsorption mechanism.

[0009] As one possible implementation, the electrode with tabs includes a main body and a tab located on one side of the main body.

[0010] The electrode die-cutting device also includes a dust removal mechanism, which is located above the support platform and has a dust suction port at least along a portion of the main body.

[0011] As one possible implementation, the dust removal mechanism includes a circumferentially enclosed body, the orthographic projection of which surrounds the electrode with tabs on the support platform, and the dust suction port is opened on the lower side of the circumferentially enclosed body; a plurality of the dust suction ports are arranged circumferentially along the circumferentially enclosed body, and the dust suction ports are positioned toward the edge of the electrode with tabs.

[0012] As an alternative implementation, a pressure member positioning mechanism is also included, which is movable and has a positioning station and an avoidance station, wherein the pressure member positioning mechanism cooperates with the pressure member positioning at the positioning station.

[0013] As an implementation method, the pressing member positioning mechanism is provided on at least one side of the electrode strip transport direction.

[0014] As an implementation, the pressing member positioning mechanism includes a linear actuator, the driving part of which is connected to a positioning member, the shape of which matches the shape of an electrode with tabs, and the positioning member having a positioning slot adapted to the corner of the pressing member.

[0015] As an alternative implementation, a first robotic arm and a second robotic arm are also included, wherein the first robotic arm causes the pressing member to switch between the pressing position and the yielding position, and the second robotic arm places the electrode with tabs in the storage position.

[0016] In the above-described solution, this application uses a pressing member in a pressing position to press against one opposite surface of the electrode strip, while an adsorption mechanism adsorbs the other opposite surface of the electrode strip. The two opposite surfaces of the electrode strip are subjected to force, ensuring that the center and edges of the electrode strip are stationary or stable, avoiding the problem of the electrode strip edges vibrating under the pulsed laser during cutting. The orthographic projection of the pressing member on the support platform coincides with the adsorption area, or the orthographic projection of the pressing member on the support platform is located within the adsorption area. This way, the pressing member covers the opposite surface of the electrode strip with tabs that is in contact with the external environment, preventing a large amount of smoke and exhaust particles generated during laser cutting from adhering to the electrode strip with tabs, thereby avoiding contamination of the electrode strip with tabs. The dust removal mechanism can remove contaminants along the cutting path, thereby reducing contaminants or impurities around the electrode strip, reducing pollution to the electrode strip, the electrode die-cutting device, and the surrounding environment, and preventing contaminants or impurities from affecting the cutting accuracy of the electrode die-cutting device. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a front view schematic diagram of the electrode die-cutting device provided in an embodiment of the present utility model;

[0019] Figure 2 This is an isometric schematic diagram of the electrode die-cutting device provided in an embodiment of the present invention;

[0020] Figure 3 This is a partial top view of the electrode die-cutting device provided in an embodiment of the present utility model;

[0021] Figure 4 A top view of the support platform of the electrode die-cutting device provided in this embodiment of the utility model. Figure 1 ;

[0022] Figure 5 A top view of the support platform of the electrode die-cutting device provided in this embodiment of the utility model. Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the dust removal mechanism provided in an embodiment of the present utility model;

[0024] Laser die-cut part 10, support platform 20, adsorption area 21, adsorption hole 211, pressing part 30, temperature sensor 40;

[0025] Pressing component positioning mechanism 50, linear actuator 51, positioning component 52;

[0026] Dust removal mechanism 60, circumferentially enclosed body 61, support base 62, filter 63;

[0027] Second robotic arm 71, first robotic arm 72, unwinding mechanism 81, and winding mechanism 82. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] The electrode strip includes a current collector and an active material layer. The current collector has a coated area with the active material layer and an uncoated area along the width of the electrode strip. Tabs are cut into the uncoated current collector to enable charging and discharging of the electrode assembly. The current collector can be a metal foil, such as copper foil or aluminum foil.

[0031] The manufacturing process of electrode sheets includes a die-cutting step, which involves using a die-cutting device to cut tabs into the uncoated area of ​​the electrode sheet. When cutting the uncoated area of ​​the electrode strip, the die-cutting device typically uses cutting parts, including laser cutting parts and blade cutting parts. When using laser cutting parts to cut the electrode strip, a large amount of smoke and exhaust gas is usually generated during the laser cutting process, causing contamination of the electrode material surface and affecting the quality of the cut electrode sheet. Simultaneously, the edges of the electrode strip vibrate continuously under the action of the pulsed laser during cutting, affecting the cutting quality.

[0032] Based on this, this application proposes an electrode die-cutting device. The electrode die-cutting device adopts a clamping method for electrode strips, which avoids the edge of the electrode strip from constantly shaking under the action of pulsed laser. The two oppositely arranged surfaces of the electrode strips are in contact with two pressure members respectively. The pressure members cover the opposite surfaces of the electrode strips, which can prevent a large amount of smoke and exhaust gas particles generated during laser cutting from adhering to the electrode with tabs, thus avoiding contamination of the electrode with tabs.

[0033] Among them, such as Figures 1-6 As shown, the electrode die-cutting apparatus includes: a support platform 20, a pressing member 30, and a laser die-cutting member 10. The support platform 20 has an adsorption area 21, which is equipped with an adsorption mechanism for adsorbing the electrode strip onto the support surface of the adsorption area 21. The pressing member 30 presses against the electrode strip when the adsorption mechanism adsorbs the electrode strip onto the support surface. The orthographic projection of the pressing member 30 on the support platform 20 coincides with, or is located within, the adsorption area 21. The laser die-cutting member 10 cuts the electrode strip along the outer contour of the pressing member 30 to obtain the corresponding electrode.

[0034] In detail, such as Figure 1 and Figure 2 As shown, an unwinding mechanism 81 is provided on the left side of the support platform 20, and a winding mechanism 82 is provided on the right side of the support platform 20. The unwinding mechanism 81 includes an unwinding roller on which electrode strip is wound, and the unwinding roller rotates to output the electrode strip; the winding mechanism 82 includes a winding roller for winding the remaining portion of the electrode strip, which is the material remaining after cutting the electrode with tabs. The unwinding roller and the winding roller work together to allow the electrode strip to pass through the support platform 20 from left to right, which helps the laser die-cut part 10 to be cut continuously.

[0035] A first robotic arm 72 and a second robotic arm 71 are provided on the support platform 20. The first robotic arm 72 and the second robotic arm 71 are located on both sides or one side of the electrode strip transport path. Figure 2 As shown, the first robotic arm 72 is located on one side of the electrode strip transport path, and the second robotic arm 71 is located on the other side of the electrode strip transport path. The second robotic arm 71 and the first robotic arm 72 are arranged one in front of the other.

[0036] The first robotic arm 72 switches the pressing member 30 between a pressing position and a yielding position. The first robotic arm 72 includes a first robotic hand that adsorbs or clamps the pressing member 30. The second robotic arm 71 places the electrode with tabs in a storage position. The second robotic arm 71 includes a second robotic hand that adsorbs the electrode with tabs.

[0037] like Figures 3-5 As shown, an adsorption area 21 is provided on the support platform 20, and the shape of the adsorption area 21 matches the shape of the electrode sheet with tabs. Several adsorption holes 211 are formed in the adsorption area 21, arranged in a rectangular or circular array. The electrode sheet with tabs includes a main body and a tab portion located on one side of the main body. The adsorption area 21 includes a first part and a second part, the first part corresponding to the main body and the tab portion corresponding to the second part. Several adsorption holes 211 are provided in the first part and the second part. The adsorption holes 211 adsorb the electrode sheet to be cut through a vacuum assembly, and the adsorption holes 211 and the vacuum assembly form an adsorption mechanism. This configuration allows the adsorption force to be evenly distributed throughout the adsorption area 21, maximizing the adsorption of the electrode sheet material and helping to suppress edge vibration of the electrode sheet material under pulsed laser action during cutting.

[0038] In addition, the adsorption mechanism may also include a filter through which air carrying impurities or contaminants is filtered out, and the impurities or contaminants can be collected, which helps to avoid secondary pollution from the impurities or contaminants.

[0039] refer to Figure 1 and Figure 2 As shown, the pressing member 30 has a pressing position and a clearance position. When the pressing member 30 is in the pressing position, it presses against the upper surface of the electrode strip, while the adsorption mechanism adsorbs the lower surface of the electrode strip. The laser die-cutting part 10 cuts the electrode strip along the outer contour of the pressing member 30 to obtain an electrode with tabs. The upper and lower surfaces of the electrode strip are subjected to force to avoid the problem of the electrode strip edge shaking under the action of pulsed laser during cutting. At the current moment, the orthogonal projection of the pressing member 30 on the support platform 20 coincides with the adsorption area 21, so that the pressing member 30 completely covers the electrode with tabs, avoiding a large amount of smoke and exhaust gas particles generated during laser cutting from adhering to the electrode with tabs. When the pressing member 30 is in the clearance position, it is set away from the adsorption area 21 to avoid affecting the cutting of the laser die-cutting part 10.

[0040] It should be noted that when the pressing member 30 is in the pressing position, the orthogonal projection of the pressing member 30 on the support platform 20 can be located within the adsorption area 21.

[0041] In summary, this application uses a pressing member in a pressing position to press one opposite surface of the electrode strip, while the adsorption mechanism adsorbs the other opposite surface of the electrode strip. The two opposite surfaces of the electrode strip are subjected to force, ensuring that the middle and edges of the electrode strip are stationary or stable, thus avoiding the problem of the electrode strip edges shaking under the action of pulsed laser during cutting. The orthographic projection of the pressing member 30 on the support table coincides with the adsorption area, or the orthographic projection of the pressing member 30 on the support table 20 is located within the adsorption area 21. In this way, the pressing member covers the opposite surface of the electrode strip with tabs that is in contact with the external environment, preventing a large amount of smoke and exhaust gas particles generated during laser cutting from adhering to the electrode strip with tabs, thereby avoiding contamination of the electrode strip with tabs.

[0042] Among them, the pressing component 30 is a heat-conducting pressing component 30, which absorbs part of the heat from the edge of the electrode sheet with tabs during the cutting process.

[0043] It should be noted that during the laser die-cutting process of the part 10, the heat accumulated during continuous cutting causes the local temperature of the electrode with tabs to become excessively high, which affects the active material layer on the electrode. Therefore, the heat-conducting pressing component 30 absorbs some of the heat from the edge of the electrode with tabs during the cutting process to reduce the temperature of the electrode with tabs and prevent it from becoming too hot.

[0044] The thermally conductive pressure component 30 includes, but is not limited to, copper pressure component 30, copper alloy pressure component 30, aluminum pressure component 30, and aluminum alloy pressure component 30. Pure copper and pure aluminum have high thermal conductivity and can instantly absorb and dissipate heat to the external environment.

[0045] Among them, such as Figure 3 As shown, a temperature sensor 40 is provided on the pressing member 30, which is used to obtain the real-time temperature of the pressing member 30. The control system of the electrode die-cutting device controls the cutting speed of the laser die-cutting part 10 per unit time according to the real-time temperature of the pressing member 30.

[0046] The temperature sensor 40 is positioned near the edge of the pressing member 30. The edge of the pressing member 30 is positioned near the laser focusing area, and the temperature at the edge of the pressing member 30 is higher than the temperature in the middle of the pressing member 30. The temperature sensor 40, positioned at the edge of the pressing member 30, can effectively reflect the highest temperature of the pressing member 30.

[0047] Multiple temperature sensors 40 are arranged circumferentially along the pressing member 30. For example... Figure 3As shown, the shape of the pressing member 30 matches the shape of the electrode with tabs. Two temperature sensors 40 are spaced apart on the front edge, rear edge, left edge, and front edge of the pressing member 30. Each temperature sensor 40 can monitor different edge areas of the pressing member 30, further effectively reflecting the highest temperature of the pressing member 30 and preventing the electrode with tabs from overheating. Notably, the temperature sensors 40 are not located in the area corresponding to the tabs of the pressing member 30.

[0048] The electrode sheet with tabs includes a main body and a tab portion located on one side of the main body. The electrode sheet die-cutting device also includes a dust removal mechanism 60, which is located above the support platform 20, and the dust removal mechanism 60 has a dust suction port at least along a portion of the main body.

[0049] like Figures 3-6 As shown, the dust removal mechanism 60 includes a circumferentially enclosed body 61 and a support base 62. The shape of the circumferentially enclosed body 61 matches the shape of the electrode tab with electrode plates. The support base 62 positions the circumferentially enclosed body 61 above the support platform 20. The distance between the circumferentially enclosed body 61 and the adsorption area 21 is d1, where 3mm ≤ d1 ≤ 10mm.

[0050] The orthographic projection of the circumferentially enclosed body 61 on the support platform 20 surrounds the adsorption area 21. A number of suction ports 611 are provided on the circumferentially enclosed body 61, arranged circumferentially along the body. The suction ports 611 are positioned facing the gap outside the adsorption area 21. This gap is used for the laser to pass through the laser-cut part 10.

[0051] The dust removal mechanism 60 can remove contaminants on the cutting path, thereby reducing contaminants or impurities around the electrode strip, reducing pollution to the electrode strip, electrode die-cutting device and the surrounding environment, and preventing contaminants or impurities from affecting the cutting accuracy of the electrode die-cutting device.

[0052] In addition, it should be noted that the dust removal mechanism 60 also includes a filter 63. The dust removal mechanism 60 uses a fan in conjunction with the dust suction port 611 to suck up the pollutants on the cutting path. The pollutants are filtered by the filter 63 to remove impurities, and the filtered impurities can be collected to avoid secondary pollution.

[0053] The electrode die-cutting device also includes a pressing component positioning mechanism 50. The pressing component positioning mechanism 50 is movable and has a positioning station and a clearance station. In the positioning station, the pressing component positioning mechanism 50 is positioned and cooperates with the pressing component 30 so that when the pressing component 30 is in the pressing position, the orthogonal projection of the pressing component 30 on the support table 20 coincides with the adsorption area 21.

[0054] like Figures 3-4 As shown, two pressure member positioning mechanisms 50 are located on one side of the electrode strip transport path and are arranged at intervals in the left-right direction; two pressure member positioning mechanisms 50 are located on the other side of the electrode strip transport path and are arranged at intervals in the left-right direction.

[0055] The pressing member positioning mechanism 50 includes a linear driver 51, the driving part of which reciprocates in the front-to-back direction, and the driving part of the linear driver 51 is connected to the positioning member 52. When the linear driver 51 moves the positioning member 52 closer to the pressing member 30 until it presses against the pressing member 30, the pressing member positioning mechanism 50 is in the positioning position at this moment; when the linear driver 51 moves the positioning member 52 away from the pressing member 30, the pressing member positioning mechanism 50 is in the avoidance position at this moment.

[0056] Since the shape of the pressing member 30 matches the shape of the electrode with the tab, the positioning member 52 has a positioning slot that matches the corner of the pressing member 30. The positioning slot includes a vertical positioning surface and a horizontal positioning surface. The vertical positioning surface is used to restrict the degree of freedom of the pressing member 30 in the left and right directions, and the horizontal positioning surface is used to restrict the degree of freedom of the pressing member 30 in the front and back directions.

[0057] Four linear actuators 51 fine-tune the position of the pressing member 30 placed by the first robotic arm 72, positioning the pressing member 30 in the left-right and front-back directions, thereby ensuring that when the pressing member 30 is in the pressing position, the orthogonal projection of the pressing member 30 on the support platform 20 coincides with the adsorption area 21.

[0058] It should be noted that in some embodiments, the pressing member positioning mechanism 50 can be located on one side of the electrode strip transport path, such as... Figure 5 As shown, the two pressure member positioning mechanisms 50 are located on one side of the electrode strip transmission path and are arranged at intervals in the left and right directions.

[0059] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or switching positional relationships are based on the orientation or switching positional relationships shown in the accompanying drawings. These are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "frame" and "layout" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "frame" or "layout" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0060] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An electrode die-cutting device, characterized in that, include: The support platform (20) is provided with an adsorption area (21), and the adsorption area (21) is provided with an adsorption mechanism, which is used to adsorb the electrode strip onto the support surface of the adsorption area (21); The pressing member (30) is used to press against the electrode strip when the adsorption mechanism adsorbs the electrode strip on the support surface. The orthographic projection of the pressing member (30) on the support platform (20) coincides with the adsorption area (21), or is located in the adsorption area (21). Laser die-cutting part (10) is used to cut the electrode strip along the outer contour of the pressing part (30) to obtain the corresponding electrode sheet.

2. The pole piece die cutting apparatus of claim 1, wherein, The pressing component (30) is a heat-conducting pressing component used to absorb part of the heat from the edge of the electrode with tabs during the cutting process.

3. The pole piece die cutting apparatus of claim 2, wherein, The pressing member (30) is provided with a temperature sensor (40), which is used to obtain the real-time temperature of the pressing member (30). The temperature sensor (40) is set close to the edge of the pressing member (30), and multiple temperature sensors (40) are arranged around the circumference of the pressing member (30).

4. The pole piece die cutting apparatus of claim 1, wherein, A plurality of adsorption holes (211) are provided on the adsorption area (21). The adsorption holes (211) adsorb the electrode strip through the vacuum pumping component. The adsorption holes (211) and the vacuum pumping component constitute the adsorption mechanism.

5. The pole piece die cutting apparatus of claim 1, wherein, The electrode plate with tabs includes a main body and a tab portion located on one side of the main body. The electrode die-cutting device also includes a dust removal mechanism (60), which is located above the support platform (20). The dust removal mechanism (60) has a dust suction port (611) at least along a portion of the main body.

6. The pole piece die cutting apparatus of claim 5, wherein, The dust removal mechanism (60) includes a circumferentially enclosed body (61), the orthographic projection of which surrounds the electrode with tabs on the support platform (20), and the dust suction port (611) is opened on the lower side of the circumferentially enclosed body (61). A plurality of the dust suction ports (611) are arranged circumferentially along the circumference of the circumferentially enclosed body (61), and the dust suction ports (611) are arranged toward the edge of the electrode with tabs.

7. The pole piece die cutting apparatus of any of claims 1-6, wherein, It also includes a pressure member positioning mechanism (50), which is movable and has a positioning station and a clearance station, wherein the pressure member positioning mechanism (50) is positioned and cooperates with the pressure member (30) at the positioning station.

8. The pole piece die cutting apparatus of claim 7, wherein, The pressing member positioning mechanism (50) is provided on at least one side of the electrode strip transmission direction.

9. The electrode die-cutting apparatus according to claim 8, characterized in that, The pressing member positioning mechanism (50) includes a linear driver (51), the driving part of which is connected to a positioning member (52). The shape of the pressing member (30) matches the shape of the electrode with tabs, and the positioning member (52) has a positioning slot that is adapted to the corner of the pressing member (30).

10. The electrode die-cutting apparatus according to any one of claims 1-6, characterized in that, It also includes a first robotic arm (72) and a second robotic arm (71), the first robotic arm (72) causing the pressing member (30) to switch between the pressing position and the avoidance position, and the second robotic arm (71) placing the electrode with tabs in the storage position.

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