A device for cutting electrode plates for energy storage devices based on multi-channel lasers

Abstract

This application provides an electrode cutting device for energy storage devices based on multi-channel lasers. It includes: a first laser cutter, a second laser cutter, a third laser cutter, a first transmission component, and a second transmission component; the first, second, and third laser cutters are spaced apart, with the first transmission component located between the first and second laser cutters, and the second transmission component located between the second and third laser cutters; the first laser cutter is used to cut a mother electrode sheet along a first direction to cut the mother electrode sheet into at least two electrode transition sheets; the first transmission component is used to transmit the electrode transition sheets to the second laser cutter; the second laser cutter is used to cut the electrode transition sheets along a second direction to cut the electrode transition sheets into at least two electrode target sheets, and the second transmission component is used to transmit the electrode target sheets to the third laser cutter; the third laser cutter is used to cut the electrode target sheets to create electrode tabs.

Description

Technical Field

[0001] This application relates to the field of electrode cutting technology, specifically to an electrode cutting device for energy storage devices based on multi-channel lasers. Background Technology

[0002] Lithium-ion batteries, sodium-ion batteries, and supercapacitors are energy storage devices with excellent performance characteristics such as high specific energy, high specific power, long cycle life, and wide operating conditions. They are widely used in portable electronic devices, electric vehicles, electric bicycles, power station energy storage, smart grids, aerospace, and military defense. The manufacturing of energy storage devices generally includes processes such as electrode manufacturing, liquid injection and encapsulation, and formation before shipment. Among these, electrode manufacturing is the core key that restricts the performance of energy storage devices, and it has a significant impact on battery manufacturing yield, efficiency, consistency, and overall performance.

[0003] In related technologies, die cutting is usually used when cutting electrode sheets. However, the controllability of the size, shape and precision of the electrode sheets is poor, and the die needs to be polished and replaced regularly, which affects continuous production. Summary of the Invention

[0004] This application provides an electrode cutting device for energy storage devices based on multi-channel lasers, which solves the problems in related technologies such as poor controllability of electrode size, shape and precision, and the need for regular grinding and die replacement, which affects continuous production.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides an energy storage device electrode cutting device based on multi-channel laser, the energy storage device electrode cutting device based on multi-channel laser includes: a first laser cutting part, a second laser cutting part, a third laser cutting part, a first transmission part, and a second transmission part;

[0007] The first laser cutting component, the second laser cutting component, and the third laser cutting component are arranged at intervals, the first transmission component is located between the first laser cutting component and the second laser cutting component, and the second transmission component is located between the second laser cutting component and the third laser cutting component;

[0008] The first laser cutter is used to cut the mother electrode sheet along a first direction to cut the mother electrode sheet into at least two electrode transition sheets; the first transmission member is used to transmit the electrode transition sheets to the second laser cutter; the second laser cutter is used to cut the electrode transition sheets along a second direction to cut the electrode transition sheets into at least two electrode target sheets; the second transmission member is used to transmit the electrode target sheets to the third laser cutter; the third laser cutter is used to cut the electrode target sheets to cut out tabs, forming electrode sheets;

[0009] The first direction is different from the second direction.

[0010] Optionally, the electrode cutting device for energy storage devices based on multi-channel lasers further includes a film stacking device and an electrode forming device.

[0011] The electrode forming device includes a forming stage, which is used to place the electrode sheet;

[0012] The film stacking device includes a diaphragm unwinding structure, a reciprocating baffle, and a diaphragm mounting clamp. The baffle has a gap in the middle. The diaphragm unwinding structure is wound with a diaphragm and is used to release the diaphragm at a target speed so that the diaphragm passes through the gap and is transferred to the forming table. The diaphragm mounting clamp is used to initially fix the diaphragm when it first contacts the electrode sheet.

[0013] The diaphragm and the electrode sheet together form the target electrode.

[0014] Optionally, the energy storage device electrode cutting device based on multi-channel laser also includes a fourth laser cutting component;

[0015] The fourth laser cutting component is used to cut the diaphragm after the diaphragm and the electrode sheet have formed a target electrode.

[0016] Optionally, the electrode cutting device for energy storage devices based on multi-channel lasers further includes a third transmission component;

[0017] The third transporter is used to transport the electrode sheet to the forming stage.

[0018] Optionally, the third transmission element includes a vacuum adsorption stage;

[0019] During the process of transferring the electrode sheet to the forming stage by the vacuum adsorption stage, the vacuum adsorption stage adsorbs the electrode sheet and moves the electrode sheet to the forming stage, and the vacuum adsorption stage places the electrode sheet.

[0020] Optionally, the electrode cutting device for energy storage devices based on multi-channel lasers further includes a fourth transmission element;

[0021] The fourth transmission element is used to transmit the mother electrode sheet to the position of the first laser cutting element, so that the first laser cutting element cuts the mother electrode sheet.

[0022] Optionally, the fourth transmission element includes opposing calendering rollers with a gap between them for the mother electrode sheet to pass through.

[0023] The calendering roller is provided with a heating element and a pressure control element; the heating element is used to heat the calendering roller so that the mother electrode sheet is calendered when the calendering roller transports the mother electrode sheet; the pressure control element is used to adjust the thickness of the mother electrode sheet by adjusting the width of the gap.

[0024] Optionally, the number of the first laser cutting component, the second laser cutting component, the third laser cutting component, the first transmission component, and the second transmission component are all two.

[0025] The two first laser cutting components, the two second laser cutting components, the two third laser cutting components, the two first transmission components, and the two second transmission components are all located on opposite sides of the electrode forming device.

[0026] Optionally, the electrode cutting device for energy storage devices based on multi-channel lasers further includes a CCD detection element;

[0027] The CCD detection device is located between the first laser cutting component and the second laser cutting component, and the CCD detection device is used to detect the cutting quality of the first laser cutting component cutting the mother electrode sheet.

[0028] Optionally, the electrode cutting device for energy storage devices based on multi-channel lasers further includes a guide;

[0029] The guide element cooperates with the second transmission element, and fixes the electrode target sheet during the transmission of the electrode target sheet by the second transmission element, so that the third laser cutter cuts the electrode target sheet.

[0030] In this embodiment, since the first, second, and third laser cutting components are spaced apart, and the first transmission component is located between the first and second laser cutting components, and the second transmission component is located between the second and third laser cutting components, after the first laser cutting component cuts the mother electrode sheet along the first direction and cuts it into at least two electrode transition pieces, the first transmission component can transmit the at least two electrode transition pieces to the second laser cutting component. The second laser cutting component can then cut the electrode transition pieces along the second direction, cutting each electrode transition piece into at least two electrode target pieces. The second transmission component can then transmit multiple electrode target pieces to the third laser cutting component, which can then cut the electrode target pieces, creating tabs on the electrode target pieces to form the electrode sheet. In other words, in this embodiment, by setting the first, second, and third laser cutting components, the mother electrode sheet can be cut multiple times to ultimately form the electrode sheet. During the cutting process, the size, shape, and precision of the mother electrode sheet can be well controlled, and periodic grinding of the cutting die is avoided. Attached Figure Description

[0031] Figure 1 This diagram illustrates an electrode cutting device for an energy storage device based on multi-channel laser, as provided in an embodiment of this application.

[0032] Figure 2 This is a schematic diagram illustrating the cutting of an electrode tab using a third laser cutting component according to an embodiment of this application;

[0033] Figure 3 This is a schematic diagram showing a scanning mother electrode sheet of a first laser-cut part provided in an embodiment of this application;

[0034] Figure 4 This diagram illustrates the principle of a diaphragm unwinding structure for releasing the diaphragm, as provided in an embodiment of this application.

[0035] Figure 5 This diagram illustrates a third transmission element transmission electrode sheet provided in an embodiment of this application.

[0036] Figure 6 This diagram illustrates a diaphragm and electrode sheet stacked according to an embodiment of this application.

[0037] Figure 7 This is a schematic diagram of an electrode forming apparatus provided in an embodiment of this application;

[0038] Figure 8 This diagram illustrates a first laser cutting component cutting a mother electrode sheet according to an embodiment of this application.

[0039] Figure label:

[0040] 10: First laser-cut component; 20: Second laser-cut component; 30: Third laser-cut component; 40: First transmission component; 50: Second transmission component; 60: Film stacking device; 61: Diaphragm unwinding structure; 62: Baffle; 63: Diaphragm mounting clamp; 70: Electrode forming device; 71: Forming table; 72: Fixing gripper; 80: Fourth laser-cut component; 90: Third transmission component; 100: Fourth transmission component; 110: Guide component; 120: Fifth transmission component; 611: Diaphragm; 001: Mother electrode sheet; 002: Electrode transition sheet; 003: Electrode target sheet; 004: Electrode sheet. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0043] Reference Figure 1 The diagram shows a schematic of an energy storage device electrode cutting device based on multi-channel laser provided in an embodiment of this application; refer to Figure 2 This diagram illustrates a third laser cutting component cutting an electrode tab according to an embodiment of this application; see reference. Figure 3 This diagram illustrates a scanning master electrode sheet for a first laser-cut component according to an embodiment of this application; see reference to... Figure 4 This diagram illustrates the principle of a diaphragm unwinding structure for releasing the diaphragm according to an embodiment of this application; refer to... Figure 5 The diagram shows a schematic of a third transmission element transmission electrode sheet provided in an embodiment of this application; refer to Figure 6 This diagram illustrates a stacked diaphragm and electrode sheet according to an embodiment of this application; see reference. Figure 7 The diagram shows a schematic of an electrode forming apparatus provided in an embodiment of this application; see reference to Figure 8 This illustration shows a schematic diagram of a first laser cutting component cutting a mother electrode sheet according to an embodiment of this application. Figures 1 to 8As shown, the electrode cutting device for energy storage devices based on multi-channel lasers includes: a first laser cutting component 10, a second laser cutting component 20, a third laser cutting component 30, a first transmission component 40, and a second transmission component 50.

[0044] A first laser cutting element 10, a second laser cutting element 20, and a third laser cutting element 30 are arranged at intervals. A first transmission element 40 is located between the first laser cutting element 10 and the second laser cutting element 20, and a second transmission element 50 is located between the second laser cutting element 20 and the third laser cutting element 30. The first laser cutting element 10 is used to cut the mother electrode sheet 001 along a first direction to cut the mother electrode sheet 001 into at least two electrode transition sheets 002. The first transmission element 40 is used to transmit the electrode transition sheets 002 to the second laser cutting element 20. The second laser cutting element 20 is used to cut the electrode transition sheets 002 along a second direction to cut the electrode transition sheets 002 into at least two electrode target sheets 003. The second transmission element 50 is used to transmit the electrode target sheets 003 to the third laser cutting element 30. The third laser cutting element 30 is used to cut the electrode target sheets 003 so that the electrode target sheets 003 are cut with tabs to form electrode sheets 004. The first direction is different from the second direction.

[0045] In this embodiment, since the first laser cutter 10, the second laser cutter 20, and the third laser cutter 30 are spaced apart, the first transmission member 40 is located between the first laser cutter 10 and the second laser cutter 20, and the second transmission member 50 is located between the second laser cutter 20 and the third laser cutter 30, after the first laser cutter 10 cuts the mother electrode sheet 001 along the first direction and cuts the mother electrode sheet 001 into at least two electrode transition sheets 002, the first transmission member 40 can transmit at least two electrode transition sheets 002 to the second laser cutter 20. The second laser cutter 20 can then cut the electrode transition sheets 002 along the second direction, cutting each electrode transition sheet 002 into at least two electrode target sheets 003. After that, the second transmission member 50 can transmit multiple electrode target sheets 003 to the third laser cutter 30, and the third laser cutter can then cut the electrode target sheets 003, cutting tabs on the electrode target sheets 003 to form electrode sheets 004. That is, in this embodiment of the application, by setting the first laser cutting part 10, the second laser cutting part 20 and the third laser cutting part 30, the mother electrode sheet 001 can be cut multiple times to finally form the electrode sheet 004. During the cutting process, the size, shape and precision of the mother electrode sheet 001 can be well controlled, and the need to regularly grind the cutting die is avoided.

[0046] Additionally, in the embodiments of this application, such as Figure 3As shown, multiple cuts are performed by the first laser cutting part 10, the second laser cutting part 20 and the third laser cutting part 30. The cuts of the mother electrode sheet 001 are smooth and flat, with fewer defects such as molten beads and burrs. In addition, there is less spatter during the cutting process, and the cut quality is high.

[0047] It should be noted that in the embodiments of this application, the first laser cutting element 10, the second laser cutting element 20, and the third laser cutting element 30 can all be femtosecond laser cutters. Of course, the first laser cutting element 10, the second laser cutting element 20, and the third laser cutting element 30 can also be other types of laser cutters. In this regard, the embodiments of this application do not limit them.

[0048] In addition, in this embodiment, the mother electrode sheet 001 includes a sheet-like current collector with an active material layer disposed thereon. When the first laser cutting member 10 cuts the mother electrode sheet 001, the first laser cutting member 10 cuts the mother electrode sheet 001 multiple times along a first direction. During the first cut, the first laser cutting member 10 cuts the active material layer, that is, cuts the active material layer, exposing the current collector at the cut formed by the first cut. Subsequently, the first laser cutting member 10 cuts the exposed current collector, so that the mother electrode sheet 001 can be completely cut. The current collector includes aluminum foil or copper foil.

[0049] In addition, in this embodiment of the application, when the first laser cutting component 10 cuts the mother electrode sheet 001, it can cut the mother electrode sheet 001 into at least two electrode transition sheets 002 along the first direction, that is, it can cut at different positions on the mother electrode sheet 001. During the cutting process, at each position of the mother electrode sheet 001, the first laser cutting component 10 cuts the mother electrode sheet 001 multiple times, that is, first cuts the active material layer, and then cuts the current collector.

[0050] For example, such as Figure 1 As shown, when the first laser cutting component 10 cuts the mother electrode sheet 001, it can cut the mother electrode sheet 001 according to the line shown in the y direction in the figure.

[0051] In addition, in the embodiments of this application, when the second laser cutter 20 cuts the electrode transition piece 002, the second laser cutter 20 also first cuts the active material layer on the current collector, and then cuts the current collector.

[0052] Furthermore, in this embodiment, the first direction and the second direction can be perpendicular. In this case, the first direction can be the same as the extension direction of one side of the mother electrode sheet 001, for example, as shown in the example. Figure 1 As shown, the mother electrode sheet 001 is cut along the y-direction. Then, after cutting the electrode transition sheet 002 along the second direction, the resulting electrode target sheet 003 has a relatively regular shape. For example, as... Figure 1As shown, the electrode transition piece 002 is cut along the x-direction to form a square electrode target piece 003.

[0053] In addition, in this embodiment, the first transmission member 40 can be opposing first rollers with a gap between them. After the first laser cutting member 10 cuts the mother electrode sheet 001, the opposing first rollers can acquire the cut mother electrode sheet 001, thus acquiring the electrode transition sheet 002, which can then move within the gap. When the opposing first rollers rotate, they provide a pulling force to the electrode transition sheet 002, causing it to move within the gap. A pressure device can be provided in the first rollers to provide pressure, ensuring that the electrode transition sheet 002 has a certain tension during transmission.

[0054] In addition, in this embodiment, the second transmission member 50 can be opposing second rollers with a gap between them. After the second laser cutting member 20 cuts the electrode transition piece 002, the opposing second rollers can acquire the cut electrode transition piece 002, thus acquiring the electrode target piece 003. The electrode target piece 003 can then move within the gap. When the opposing second rollers rotate, they effectively provide a pulling force to the electrode target piece 003, thereby causing the electrode target piece 003 to move within the gap between the opposing second rollers. The second transmission member 50 may include multiple sets of opposing second rollers, with each set of opposing second rollers consisting of two rollers. At this time, the set of second rollers closest to the second laser cutting member 20 can acquire the electrode target sheet 003, and then the other sets of second rollers can transmit the electrode target sheet 003. Alternatively, the other set of second rollers adjacent to the set of second rollers closest to the second laser cutting member 20 can fix the electrode target sheet 003, so that the third laser cutting member 30 can cut the electrode target sheet 003, that is, cut out the tabs on the electrode target sheet 003 to form the electrode sheet 004.

[0055] For example, such as Figure 1As shown, the second transmission member 50 includes two sets of opposing second rollers. One set of second rollers is close to the second laser cutting member 20, and the other set is away from the second laser cutting member 20. The set of second rollers close to the second laser cutting member 20 can acquire the electrode transition piece 002 after the first laser cutting member 10 cuts it, while the set of second rollers away from the second laser cutting member 20 can fix the electrode transition piece 002. The third laser cutting member 30 can then cut the electrode target piece 003, that is, cut the tabs on the electrode target piece 003 to form the electrode piece 004. It should be noted that the set of second rollers away from the second laser cutting member 20 can rotate at a relatively slow speed, so that the electrode transition piece 002 moves relatively slowly, which is equivalent to fixing the electrode transition piece 002, allowing the third laser cutting member 30 to cut the electrode transition piece 002.

[0056] Additionally, in some embodiments, such as Figure 1 As shown, the electrode cutting device for energy storage devices based on multi-channel lasers may further include a guide 110. The guide 110 cooperates with the second transmission member 50, and fixes the electrode target sheet 003 during the transmission of the electrode target sheet 003 by the second transmission member 50, so that the third laser cutter 30 cuts the electrode target sheet 003.

[0057] When the guide 110 cooperates with the second transmission member 50, that is, during the process of the second transmission member 50 transmitting the electrode target piece 003, part of the electrode target piece 003 will be embedded in the guide 110 and move along the guide 110. Thus, the guide 110 can fix the electrode target piece 003. And the electrode target piece 003 moves at a relatively low speed, so the third laser cutting member 30 can cut the tabs on the electrode target piece 003.

[0058] For example, such as Figure 2 As shown, the third laser cutter 30 can cut along the line shown in the figure to cut tabs on the electrode target sheet 003.

[0059] Additionally, in some embodiments, such as Figure 1 and Figure 7As shown, the electrode cutting device for energy storage devices based on multi-channel lasers may further include a film stacking device 60 and an electrode forming device 70. The electrode forming device 70 includes a forming stage 71 for placing the electrode sheet 004. The film stacking device 60 includes a diaphragm unwinding structure 61, a reciprocating baffle 62, and a diaphragm mounting clamp 63. The baffle 62 has a gap in the middle. The diaphragm unwinding structure 61 is wound with a diaphragm 611. The diaphragm unwinding structure 61 is used to release the diaphragm 611 at a target speed so that the diaphragm 611 passes through the gap and is transferred to the forming stage 71. The diaphragm mounting clamp 63 is used to initially fix the diaphragm 611 when it first contacts the electrode sheet 004. The diaphragm 611 and the electrode sheet 004 form the target electrode.

[0060] Since the reciprocating baffle 62 has a gap in the middle, after the diaphragm 611 is released by the unwinding device, the diaphragm 611 can pass through the gap, so that the diaphragm 611 will come into contact with the electrode sheet 004 on the forming table 71. Then the diaphragm 611 can be fixed on the forming table 71 by the diaphragm mounting clip 63, so that the diaphragm 611 and the electrode sheet 004 form the target electrode.

[0061] The reciprocating motion of the baffle 62 allows the diaphragm 611 to move back and forth on the forming table 71, for example, as... Figure 6 As shown, the diaphragm 611 can form an S-shape on the forming stage 71 due to the reciprocating movement of the baffle 62, thereby being stacked with the electrode sheet 004.

[0062] Additionally, in the embodiments of this application, such as Figure 7 As shown, two sets of fixing claws 72 can be provided on opposite sides of the forming stage 71. The two sets of fixing claws 72 on each side can move alternately for stacking the electrode sheets 004. After one set of fixing claws 72 on one side completes its gripping action, the other set of fixing claws 72 can open, completing an alternating gripping action to grip and fix the electrode sheets 004. When one set of fixing claws 72 opens, the other set of fixing claws 72 is in a gripping state, thus the two sets of fixing claws 72 move alternately to grip and fix the electrode sheets 004. The fixing claws 72 can be covered with a protective film, such as polyoxymethylene, to prevent damage to the electrode sheets 004 when the fixing claws 72 come into contact with them.

[0063] It should be noted that the diaphragm unwinding structure 61 may include a motor and a winding roller. The diaphragm 611 can be wound on the winding roller, which is connected to the motor. The motor drives the winding roller to rotate, thereby releasing the diaphragm 611. The motor speed can be controlled so that it drives the winding roller to rotate at a target speed, thus allowing the winding roller to release the diaphragm 611 at the target speed.

[0064] In addition, in this embodiment, after the diaphragm 611 passes through the baffle 62 with a gap, the diaphragm 611 forms an angle with the forming stage 71, which facilitates the placement of the electrode sheet 004 on the forming stage 71 and facilitates the assembly of the diaphragm 611 and the electrode sheet 004.

[0065] Additionally, in some embodiments, such as Figure 1 As shown, the electrode cutting device for energy storage devices based on multi-channel lasers may further include a fourth laser cutter 80. The fourth laser cutter 80 is used to cut the diaphragm 611 after the diaphragm 611 and the electrode sheet 004 have formed a target electrode.

[0066] When the electrode cutting device for energy storage devices based on multi-channel lasers includes a fourth laser cutter 80, after the diaphragm 611 and the electrode sheet 004 are aligned and stacked, the fourth laser cutter 80 can cut the diaphragm 611. The diaphragm mounting clamp 63 then holds the diaphragm 611 on one side of the forming stage 71. Under the action of the fixing claw 72 on the forming stage 71, the initial fixing of the diaphragm 611 is completed. In other words, by providing the fourth laser cutter 80, it is easier to initially fix the diaphragm 611 on the forming stage 71, thereby facilitating the formation of the target electrode by the diaphragm 611 and the electrode sheet 004.

[0067] It should be noted that the type of the fourth laser cutting component 80 can be the same as that of the first laser cutting component 10, that is, the fourth laser cutting component 80 can also be a femtosecond laser cutter.

[0068] Additionally, in some embodiments, such as Figure 1 As shown, the electrode cutting device for energy storage devices based on multi-channel lasers may further include a third transport member 90. The third transport member 90 is used to transport the electrode sheet 004 onto the forming stage 71.

[0069] When the electrode cutting device for a multi-channel laser-based energy storage device includes a third transmission member 90, after the third laser cutter 30 cuts out the electrode sheet 004, the third transmission member 90 can transport the electrode sheet 004 to the forming stage 71, thereby facilitating the forming stage 71 to form the electrode sheet 004 and the diaphragm 611 to form the target electrode. In other words, by providing the third transmission member 90, the formation of the target electrode can be facilitated.

[0070] Additionally, in some embodiments, the third transfer member 90 may include a vacuum adsorption stage. During the process of transferring the electrode sheet 004 to the forming stage 71 via the vacuum adsorption stage, the vacuum adsorption stage adsorbs the electrode sheet 004 and moves the electrode sheet 004 to the forming stage 71, and the vacuum adsorption stage places the electrode sheet 004.

[0071] When the third transmission component 90 includes a vacuum adsorption stage, the vacuum adsorption stage can generate an adsorption force when the electrode sheet 004 needs to be transferred, thus adsorbing the electrode sheet 004. When the vacuum adsorption stage transfers the electrode sheet 004 to the forming stage 71, it can stop generating the adsorption force, thereby separating the electrode sheet 004 from the vacuum adsorption stage. That is, by setting the third transmission component 90 as a vacuum adsorption stage, the electrode sheet 004 can be transferred to the forming stage 71 more accurately.

[0072] It should be noted that the vacuum adsorption stage has an adsorption surface with multiple through holes. The vacuum adsorption stage is equipped with a vacuum pumping device. When the vacuum adsorption stage needs to transfer the electrode sheet 004, the vacuum pumping device operates and is in a vacuuming state, thereby generating an adsorption force that can adsorb the electrode sheet 004. When the vacuum adsorption stage transfers the electrode sheet 004 to the forming stage 71, the vacuum pumping device is either in a blowing state or a closed state. When in a blowing state, the electrode sheet 004 can separate from the vacuum adsorption stage through the airflow; when in a closed state, the electrode sheet 004 can also separate from the vacuum adsorption stage by its own gravity.

[0073] In addition, in this embodiment, when the third transmission member 90 includes a vacuum adsorption stage, the electrode cutting device for energy storage devices based on multi-channel lasers may further include a fifth transmission member 120. The fifth transmission member 120 includes opposing third rollers with a gap between them, allowing the opposing third rollers to transmit the electrode sheet 004 to the vacuum adsorption stage. A heating element may be provided in the third roller to heat it, thereby improving the rolling effect of the electrode sheet 004 during transmission. Furthermore, a pressure element may be provided in the third roller to transmit pressure, adjusting the gap between the opposing third rollers and allowing the thickness of the electrode sheet 004 to be adjusted during transmission.

[0074] Furthermore, in this embodiment, the forming stage 71 can reciprocate along two opposing directions. When the diaphragm 611 moves to the position of the forming stage 71, the movement of the forming stage 71 can adjust the angle between the diaphragm 611 and the forming stage 71. This allows the vacuum adsorption stage to place the adsorbed electrode sheet 004 onto the diaphragm 611. When the forming stage 71 moves to another position, the vacuum adsorption stage transfers another electrode sheet 004 onto the diaphragm 611. Additionally, when the forming stage 71 reciprocates along two opposing directions, it can cooperate with the vacuum adsorption stage, allowing the vacuum adsorption stage to place the electrode sheet 004 onto the forming stage 71 at a set frequency.

[0075] Additionally, in some embodiments, such as Figure 1 As shown, the electrode cutting device for energy storage devices based on multi-channel lasers may further include a fourth transmission member 100. The fourth transmission member 100 is used to transmit the mother electrode 001 to the position of the first laser cutter 10, so that the first laser cutter 10 cuts the mother electrode 001.

[0076] When the electrode cutting device for energy storage devices based on multi-channel lasers includes a fourth transmission member 100, the mother electrode sheet 001 can be transmitted to the position of the first laser cutting member 10 via the fourth transmission member 100. The first laser cutting member 10 can then cut the mother electrode sheet 001, facilitating subsequent actions by the first transmission member 40 and the second laser cutting member 20, thereby facilitating the formation of the target electrode. In other words, by providing the fourth transmission member 100, the mother electrode sheet 001 can be easily transmitted and formed.

[0077] In some embodiments, the fourth transmission member 100 may include opposing calendering rollers with a gap between them for the mother electrode sheet 001 to pass through. The calendering rollers are provided with a heating element and a pressure control element; the heating element heats the calendering rollers so that the mother electrode sheet 001 is calendered during transmission; the pressure control element adjusts the thickness of the mother electrode sheet 001 by adjusting the width of the gap.

[0078] When the fifth transfer element 120 includes opposing calendering rollers with a gap between them, the opposing calendering rollers can transfer the master electrode sheet 001 to the vacuum adsorption stage. A heating element can be provided in the calendering rollers to heat them, thereby improving the calendering effect on the master electrode sheet 001 during transfer. Additionally, a pressure element can be provided in the calendering rollers to transmit pressure, adjusting the gap between them. This allows the thickness of the master electrode sheet 001 to be adjusted during transfer, thus improving the quality of the target electrode.

[0079] It should be noted that the fourth transmission element 100 can also be other devices with transmission functions, such as a robotic arm. The specific type of the fourth transmission element 100 is not limited in this embodiment.

[0080] In some embodiments, the number of the first laser cutting element 10, the second laser cutting element 20, the third laser cutting element 30, the first transmission element 40, and the second transmission element 50 can all be two. The two first laser cutting elements 10, the two second laser cutting elements 20, the two third laser cutting elements 30, the two first transmission elements 40, and the two second transmission elements 50 are all located on opposite sides of the electrode forming device 70.

[0081] In practical use, a battery cell typically includes a positive electrode sheet 004 and a negative electrode sheet 004, which are stacked together and separated by a membrane 611. To accelerate the forming of the electrode sheet 004, in this embodiment, two first laser cutting elements 10, two second laser cutting elements 20, two third laser cutting elements 30, two first transmission elements 40, and two second transmission elements 50 are all located on opposite sides of the electrode forming device 70. This allows the first laser cutting element 10 to cut the positive electrode mother electrode sheet 001 on one side of the electrode forming device 70, which is then transmitted via the first transmission element 40 until the positive electrode target sheet 003 cut by the third laser cutting element 30 on that side is formed into the positive electrode sheet 004. Similarly, on the other side of the electrode forming device 70, the negative electrode mother electrode sheet 001 is cut by the first laser element, and then transported by the first transmission element 40 until the third laser element on this side cuts the negative electrode target sheet 003 to form the negative electrode sheet 004. Then, the positive electrode sheet 004 and the negative electrode sheet 004 can be placed on the electrode forming stage 71, and the positive electrode sheet 004 and the negative electrode sheet 004 are stacked, with a diaphragm 611 between the positive electrode sheet 004 and the negative electrode sheet 004. That is, by setting the number of the first laser cutting element 10, the second laser cutting element 20, the third laser cutting element 30, the first transmission element 40 and the second transmission element 50 to two, and the two first laser cutting elements 10, the two second laser cutting elements 20, the two third laser cutting elements 30, the two first transmission elements 40 and the two second transmission elements 50 are all located on opposite sides of the electrode forming device 70, it is convenient to form the battery cell on the electrode forming stage 71.

[0082] It should be noted that on the electrode forming stage 71, the separator 611 can be fixed first, then the positive electrode plate 004 can be placed, then the separator 611 can be placed again, then the negative electrode plate 004 can be placed, and then the positive electrode plate 004, separator 611 and negative electrode plate 004 can be placed in sequence until the set number of layers is reached, and then the battery cell can be formed.

[0083] In addition, in some embodiments, the energy storage device electrode cutting apparatus based on multi-channel lasers may also include a CCD detection element (not shown in the figure). The CCD detection element is located between the first laser cutter 10 and the second laser cutter 20, and is used to detect the cutting quality of the first laser cutter 10 cutting the mother electrode sheet 001.

[0084] When the CCD detector is located between the first laser cutter 10 and the second laser cutter 20, after the first laser cutter 10 cuts the mother electrode sheet 001, forming the electrode transition sheet 002, the CCD detector can acquire an image of the electrode transition sheet 002. Based on this image, the CCD detector can determine the cutting quality of the mother electrode sheet 001 by the first laser cutter 10. If the cutting quality of the mother electrode sheet 001 meets the set cutting requirements, the cut mother electrode sheet 001 can be acquired by the first transmission member 40, which can then transmit the cut mother electrode sheet 001, i.e., transmit the electrode transition sheet 002. If the cutting quality of the mother electrode sheet 001 does not meet the set cutting requirements, the first transmission member 40 will not acquire the cut mother electrode sheet 001, i.e., the first transmission member 40 will not transmit the electrode transition sheet 002.

[0085] It should be noted that the electrode cutting device for energy storage devices based on multi-channel lasers may include a controller, a CCD detection device, and a first transmission device 40, all of which can be electrically connected to the controller. After the CCD detection acquires an image of the first laser cutting device 10 cutting the mother electrode 001, the controller can acquire the image and determine the cutting quality based on the image. Based on the cutting quality, the controller determines whether the first transmission device 40 should transmit the cut mother electrode 001, that is, whether the first transmission device 40 should transmit the electrode transition piece 002.

[0086] It should also be noted that when the electrode cutting device for energy storage devices based on multi-pass lasers includes a controller, the first laser cutting element 10, the second laser cutting element 20, the third laser cutting element 30, the fourth laser cutting element 80, the first transmission element 40, the second transmission element 50, the third transmission element 90, and the fourth transmission element 100 can all be electrically connected to the controller, thereby allowing the controller to control these devices and achieve the purpose of automatically cutting the electrode sheet 004. Additionally, the electrode forming stage 71 and the diaphragm 611 stacking device can also be electrically connected to the controller.

[0087] In addition, in this embodiment, the electrode cutting device for energy storage devices based on multi-channel lasers may further include a transport component, which cooperates with the forming stage 71 and is used to transport the target electrode formed on the forming stage 71. That is, after the target electrode is formed on the forming stage 71, the transport component can transport the target electrode.

[0088] In this embodiment, since the first laser cutter 10, the second laser cutter 20, and the third laser cutter 30 are spaced apart, the first transmission member 40 is located between the first laser cutter 10 and the second laser cutter 20, and the second transmission member 50 is located between the second laser cutter 20 and the third laser cutter 30, after the first laser cutter 10 cuts the mother electrode sheet 001 along the first direction and cuts the mother electrode sheet 001 into at least two electrode transition sheets 002, the first transmission member 40 can transmit at least two electrode transition sheets 002 to the second laser cutter 20. The second laser cutter 20 can then cut the electrode transition sheets 002 along the second direction, cutting each electrode transition sheet 002 into at least two electrode target sheets 003. After that, the second transmission member 50 can transmit multiple electrode target sheets 003 to the third laser cutter 30, and the third laser cutter can then cut the electrode target sheets 003, cutting tabs on the electrode target sheets 003 to form electrode sheets 004. That is, in this embodiment of the application, by setting the first laser cutting part 10, the second laser cutting part 20 and the third laser cutting part 30, the mother electrode sheet 001 can be cut multiple times to finally form the electrode sheet 004. During the cutting process, the size, shape and precision of the mother electrode sheet 001 can be well controlled, and the need to regularly grind the cutting die is avoided.

[0089] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0090] Although optional embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the optional embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0091] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0092] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the principles and implementation methods of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A multi-pass laser based energy storage device electrode tab cutting apparatus, characterized by, The multi-pass laser-based energy storage device pole piece cutting device comprises a first laser cutting piece, a second laser cutting piece, a third laser cutting piece, a first transmission piece, and a second transmission piece; The first laser cutting piece, the second laser cutting piece, and the third laser cutting piece are arranged at intervals, the first transmission piece is located between the first laser cutting piece and the second laser cutting piece, and the second transmission piece is located between the second laser cutting piece and the third laser cutting piece; The first laser cutting piece is used to cut a mother electrode piece in a first direction to cut the mother electrode piece into at least two electrode transition pieces; the first transmission piece is used to transmit the electrode transition pieces to the second laser cutting piece; the second laser cutting piece is used to cut the electrode transition pieces in a second direction to cut the electrode transition pieces into at least two electrode target pieces; the second transmission piece is used to transmit the electrode target pieces to the third laser cutting piece; and the third laser cutting piece is used to cut the electrode target pieces to cut the electrode target pieces into electrode pieces with tabs. The first direction is different from the second direction; The multi-pass laser-based energy storage device pole piece cutting device further comprises a film stacking device and an electrode forming device; The electrode forming device comprises a forming table for placing the electrode pieces; The film stacking device comprises a diaphragm unwinding structure, a reciprocating baffle, and a diaphragm mounting clamp, the baffle has a gap in the middle, the diaphragm unwinding structure is wound with a diaphragm, and the diaphragm unwinding structure is used to release the diaphragm at a target speed to make the diaphragm pass through the gap and be transmitted to the forming table; and the diaphragm mounting clamp is used to fix the diaphragm for the first time when the diaphragm first contacts the electrode piece; The diaphragm and the electrode piece form a target electrode; The multi-pass laser-based energy storage device pole piece cutting device further comprises a guide piece; The guide piece cooperates with the second transmission piece, and fixes the electrode target pieces during the transmission of the electrode target pieces by the second transmission piece, so that the third laser cutting piece cuts the electrode target pieces.

2. The multi-pass laser based energy storage device electrode tab cutting apparatus of claim 1, wherein, The multi-pass laser-based energy storage device pole piece cutting device further comprises a fourth laser cutting piece; The fourth laser cutting piece is used to cut the diaphragm after the diaphragm and the electrode piece form a target electrode.

3. The multi-pass laser based energy storage device electrode tab cutting apparatus of claim 1, wherein, The multi-pass laser-based energy storage device pole piece cutting device further comprises a third transmission piece; The third transmission piece is used to transport the electrode pieces to the forming table.

4. The multi-pass laser-based energy storage device electrode tab cutting apparatus of claim 3, wherein, The third transmission piece comprises a vacuum adsorption table; During the transmission of the electrode pieces from the vacuum adsorption table to the forming table, the vacuum adsorption table adsorbs the electrode pieces and moves the electrode pieces to the forming table, and the vacuum adsorption table places the electrode pieces.

5. The multi-pass laser-based energy storage device electrode tab cutting apparatus of claim 1, wherein, The multi-pass laser-based energy storage device pole piece cutting device further comprises a fourth transmission piece; The fourth transmission piece is used to transmit the mother electrode piece to the position of the first laser cutting piece, so that the first laser cutting piece cuts the mother electrode piece.

6. The multi-pass laser-based energy storage device electrode tab cutting apparatus of claim 5, wherein, The fourth conveying member comprises opposite calender rollers with a gap therebetween for passing the mother electrode sheet; The calender rollers are provided with heating members and pressure control members; the heating members are used to heat the calender rollers so that the mother electrode sheet is calendered when the calender rollers convey the mother electrode sheet; the pressure control members are used to adjust the thickness of the mother electrode sheet by adjusting the width of the gap.

7. The multi-pass laser-based energy storage device electrode tab cutting apparatus of claim 1, wherein, The number of the first laser cutting members, the second laser cutting members, the third laser cutting members, the first conveying members and the second conveying members is two. The two first laser cutting members, the two second laser cutting members, the two third laser cutting members, the two first conveying members and the two second conveying members are located on opposite sides of the electrode forming device.

8. The multi-pass laser-based energy storage device electrode tab cutting apparatus of any of claims 1-7, wherein, The multi-pass laser-based electrode sheet cutting device for energy storage devices further comprises a CCD detection member; The CCD detection member is located between the first laser cutting member and the second laser cutting member, and is used to detect the cutting quality of the first laser cutting member cutting the mother electrode sheet.

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