Pole piece cutting equipment and battery production line

Abstract

The utility model discloses pole piece cutting equipment and a battery production line, and relates to the technical field of battery manufacturing. The pole piece cutting equipment comprises a slitting device, a conveying device and a removing device, the slitting device is used for slitting a strip-shaped pole piece into at least two pole piece sub-strips, and the conveying device is used for conveying the strip-shaped pole piece and the pole piece sub-strips; the conveying device is configured to enable the pole piece strips to be circuitously arranged in the tape conveying direction so as to be projected in the gravity direction to form a projection overlapping area; the removing device is used for removing burrs of the pole piece strips passing through the preset position; projection is carried out in the gravity direction, and projection of the preset position is located outside the projection overlapping area. The conveying device enables the pole pieces to be arranged in a roundabout mode to form a projection overlapping area, and the space utilization rate of the pole piece cutting equipment can be improved. The projection is carried out in the gravity direction, and the projection of the preset position where the burrs are removed is located outside the projection overlapping area, so that the burrs can be removed, the removed burrs can be prevented from falling onto the pole piece strips, and the burrs can be reduced.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an electrode cutting device and a battery production line. Background Technology

[0002] In the manufacturing process of batteries such as lithium-ion and sodium-ion batteries, burrs on the electrodes can affect the production quality of the batteries and may also have a significant impact on their safety and performance. Burrs typically refer to tiny metal or material fragments that occur during the processing of the positive and negative electrode materials due to factors such as machining and material properties.

[0003] On the one hand, as the energy density requirements of lithium batteries increase, the specific capacity and powder density requirements of materials are also higher, which leads to a more obvious particle distribution design of large and small particles in cathode materials. The particle size of large cathode materials has increased, but the increase in particle size may cause it to become burrs.

[0004] On the other hand, with the increasing requirements for fast charging, the electrode thickness of the cathode and anode is usually designed to be thinner; the dual effects of electrode thinning and increased coupling particle size result in larger burrs, which are more likely to extend out of the coating area, increasing the risk of burr overlap.

[0005] Among these, burrs may increase the risk of internal short circuits in batteries such as lithium batteries, lead to battery capacity decay and increased self-discharge rate, and affect the performance consistency of individual batteries. Utility Model Content

[0006] The main purpose of this application is to propose an electrode cutting equipment and a battery production line, which aims to reduce the burrs on the electrode sheets.

[0007] To achieve the above objectives, the electrode cutting equipment proposed in this application includes a slitting device, a conveying device, and a removal device. The slitting device is used to slit the strip electrode into at least two electrode strips. The conveying device is used to convey the strip electrode and the electrode strips. The conveying device is configured such that the electrode strips are arranged in a meandering manner in the conveying direction to form a projection overlap area along the direction of gravity. The removal device is used to remove burrs from the electrode strips conveyed by the conveying device through a preset position. The projection is made along the direction of gravity, and the projection at the preset position is located outside the projection overlap area.

[0008] The electrode cutting equipment provided in this application, when in use, uses a slitting device to cut the strip electrode into at least two electrode strips, thereby improving overall production efficiency; the conveying device arranges the electrode strips in a meandering manner along the conveyor belt direction to form a projection overlap area, which helps to improve the space utilization of the electrode cutting equipment. Projection along the direction of gravity ensures that the projection of the preset position for burr removal is outside the projection overlap area, thus both removing burrs from the electrode strips passing through the preset position and preventing the removed burrs from falling onto the electrode strips, thereby reducing burrs.

[0009] In some implementations, the electrode cutting equipment further includes a first detection device for detecting burrs on the electrode strips; the first detection device is electrically connected to the controllable end of a removal device, which removes burrs based on the burr detection signal from the first detection device.

[0010] At this time, the electrode cutting equipment can provide more information about the burrs through the first detection device, so that the removal device can remove the burrs more accurately based on the burr detection signal of the first detection device.

[0011] In some implementations, at least a portion of the removal device is located on one side of the projection overlap area along the stripping direction of the electrode sheet, and at least a portion of the first detection device is located on the other side of the projection overlap area.

[0012] At this time, since the electrode strips are arranged in a roundabout way in the projection overlap area, the time for the electrode strips to pass through the projection overlap area is relatively long. Along the walking direction of the electrode strips, the removal device and the first detection device are located on both sides of the projection overlap area, which helps to increase the response time of the removal device to the burr detection signal of the first detection device and helps to avoid the burr being missed due to the removal device not responding in time.

[0013] In some implementations, the removal device includes an energy transmitter for sending energy to the burrs on the electrode slits to melt the burrs.

[0014] At this point, the energy transmitter melts the burrs on the electrode slitting by sending energy to them, which helps to remove the burrs through localized action and thus helps to avoid accidentally damaging other parts of the electrode slitting due to large-area processing.

[0015] In some implementations, the electrode cutting device also includes a partition between two adjacent electrode strips in the direction of gravity; projected along the direction of gravity, the partition covers the lower electrode strip in the width direction of the electrode strip.

[0016] At this point, the separator covers the lower electrode slits in the width direction of the electrode slits, thereby preventing the removed burrs from falling from the top onto the lower electrode slits. This helps to prevent the falling burrs from causing edge damage to the membrane area of ​​the lower electrode slits and also helps to prevent the falling burrs from adhering to the lower electrode slits.

[0017] In some implementations, the electrode cutting device includes a first guide rod that extends along the width direction of the electrode stripping; a removal device is mounted on the first guide rod and is movably connected to the first guide rod along its extension direction.

[0018] At this time, the first guide rod extends along the width direction of the electrode slitting, and the removal device moves and connects with the first guide rod along the extension direction of the first guide rod, so that the removal device can change its position along the width direction of the electrode slitting, and thus the removal device can be applied to electrode slitting of different width specifications.

[0019] In some implementations, the electrode cutting equipment also includes a cleaning device for removing burrs that have detached from the electrode strips.

[0020] At this point, the cleaning device removes the burrs that have detached from the electrode slitting process, thereby improving the cleanliness of the electrode slitting process and reducing the adverse effects of foreign matter on the quality of the electrode slitting process.

[0021] In some implementations, the electrode cutting device includes a second guide rod that extends along the width direction of the electrode stripping; a cleaning device is mounted on the second guide rod and is movably connected to the second guide rod along its extension direction.

[0022] At this time, the second guide rod extends along the width direction of the electrode slitting, and the cleaning device moves and connects with the second guide rod along the extension direction of the second guide rod, so that the cleaning device can change position along the width direction of the electrode slitting, and thus the cleaning device can be applied to electrode slitting of different width specifications.

[0023] In some implementations, the electrode cutting equipment also includes a second detection device for detecting burrs on the electrode slitting process; the second detection device is located downstream of the removal device along the belt travel direction of the electrode slitting process.

[0024] At this time, the second detection device is located downstream of the removal device along the stripping direction of the electrode sheet, so as to detect the burr removal effect of the removal device, which is conducive to detecting the burrs that have not been removed and to timely processing.

[0025] In some implementations, the electrode cutting equipment also includes a position recording device, which is used to record the detection position of the detection part of the electrode slitting by the first detection device. The position recording device is electrically connected to the controllable end of the removal device. When the first detection device detects burrs, the removal device is used to remove burrs when the detection part moves to the preset position based on the belt speed of the electrode slitting and the distance information between the detection position and the preset position.

[0026] At this time, when the first detection device detects a burr, the removal device removes the burr when the detection part moves to the preset position based on the conveyor speed of the electrode slitting and the distance information between the detection position and the preset position. This helps to improve the positional accuracy of burr removal and facilitates the coordinated conveying of electrode slitting and burr removal.

[0027] In some implementations, the electrode cutting equipment includes a drive motor for conveying the electrode by a drive conveying device, and a position recording device includes a position encoder disposed on the drive motor; when the first detection device detects the detection part of the electrode slitting, the position encoder records the position of the detection part to form a detection position.

[0028] At this point, position detection is performed by a position encoder located on the drive motor, which helps to efficiently provide position information for burr detection and reduces the overall cost of burr removal in electrode cutting equipment through the position encoder.

[0029] This application also provides a battery production line, which includes the above-mentioned electrode cutting equipment.

[0030] The battery production line provided in this application, when in use, utilizes a slitting device to cut strip-shaped electrode sheets into at least two electrode strips, thereby improving overall production efficiency. The conveying device arranges the electrode strips in a meandering manner along the conveyor belt direction to form a projection overlap area, which improves the space utilization of the electrode cutting equipment. Projection along the direction of gravity ensures that the projection of the preset position for burr removal is outside the projection overlap area. This allows for burr removal of the electrode strips passing through the preset position while preventing the removed burrs from falling onto the electrode strips, thus reducing burrs. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of an electrical device corresponding to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of a battery device corresponding to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of a battery cell corresponding to an embodiment of this application;

[0035] Figure 4 A schematic diagram of an embodiment of the electrode cutting equipment provided in this application;

[0036] Figure 5 This is a schematic diagram of the structure of the first detection device in one embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the structure of the removal device and the cleaning device in one embodiment of this application;

[0038] Figure 7 This is a schematic diagram illustrating the use of the removal device in one embodiment of this application;

[0039] Figure 8 This is a schematic diagram illustrating the use of the cleaning device in one embodiment of this application.

[0040] Explanation of icon numbers:

[0041] 10. Electrical equipment; 11. Electrical controllers; 12. Motors;

[0042] 20. Battery assembly; 21. Battery housing; 22. Individual battery cell assembly;

[0043] 221. Battery cell; 222. Casing; 223. Top cover; 224. Adapter plate;

[0044] 225. Bare battery cell; 226. Electrode tab; 227. Electrode terminal;

[0045] 30. Strip electrode; 31. Electrode slitting; 32. Burr; 33. Molten beads;

[0046] 40. Electrode cutting equipment; 41. Slitting device; 42. Conveying device; 43. Removal device;

[0047] 44. First detection device; 45. Partition plate; 46. Cleaning device;

[0048] 47. First guide rod; 48. Second guide rod.

[0049] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0050] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0051] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0052] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them; when the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0053] In the manufacturing process of batteries such as lithium-ion and sodium-ion batteries, burrs on the electrodes can affect the production quality of the batteries and may also have a significant impact on their safety and performance. Burrs typically refer to tiny metal or material fragments that occur during the processing of the positive and negative electrode materials due to factors such as machining and material properties.

[0054] On the one hand, as the energy density requirements of lithium batteries increase, the specific capacity and powder density requirements of materials are also higher, which leads to a more obvious particle distribution design of large and small particles in cathode materials. The particle size of large cathode materials has increased, but the increase in particle size may cause it to become burrs.

[0055] On the other hand, with the increasing requirements for fast charging, the electrode thickness of the cathode and anode is usually designed to be thinner; the dual effects of electrode thinning and increased coupling particle size result in larger burrs, which are more likely to extend out of the coating area, increasing the risk of burr overlap.

[0056] Among these, burrs may increase the risk of internal short circuits in batteries such as lithium batteries, lead to battery capacity decay and increased self-discharge rate, and affect the performance consistency of individual batteries.

[0057] Based on the above considerations, in order to reduce burrs on the electrode sheets, this application proposes an electrode sheet cutting equipment and a battery production line. When in use, the aforementioned electrode sheet cutting equipment and battery production line can not only remove burrs from the electrode sheets passing through preset positions during slitting, but also help prevent the removed burrs from falling onto the electrode sheet slitting surface.

[0058] The electrode cutting equipment and battery production line proposed in this application will be explained and described in detail below with specific implementation methods.

[0059] The aforementioned electrode cutting equipment and battery production line can be used for the production of electrode sheets, as well as the production of electrical equipment and battery devices. It is understood that the electrical equipment can include, but is not limited to, mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, with spacecraft including airplanes, rockets, space shuttles, and spacecraft.

[0060] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment. Unless there are obvious contradictions, the following embodiments can also be applied to electrical equipment other than vehicles.

[0061] Reference Figure 1 The electrical equipment 10 includes an electrical controller 11, a motor 12, and a battery device 20. The battery device 20 can be used to power the vehicle, for example, the battery device 20 can be used as the vehicle's operating power source; the electrical controller 11 is used to control the battery device 20 to power the motor 12, for example, to power the vehicle's starting, navigation, and driving.

[0062] It is understandable that the battery device 20 can not only serve as the operating power source for the vehicle, an electrical device 10, but also as the driving power source for the vehicle, thereby completely or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0063] Reference Figure 2 The battery device 20 includes a battery housing 21 and a battery cell assembly 22, which is housed within the battery housing 21. In some embodiments, the battery cell assembly 22 may be housed within the battery housing 21 by being fixed to it.

[0064] The battery device 20 mentioned in the embodiments of this application may include at least one battery cell assembly 22, which is used to provide voltage and capacity. The battery cell assembly 22 may include at least one battery cell 221, and multiple battery cells 221 may be connected in series, parallel or mixed connection through a busbar, wherein mixed connection can be understood to include series and parallel connection.

[0065] The battery cell assembly 22 can be a battery module, which is formed by arranging and fixing multiple battery cells 221 to form an independent module; for example, a battery module can be formed by bundling multiple battery cells 221 together with cable ties. Of course, the battery cell assembly 22 may also include only one battery cell 221, and this embodiment does not limit this.

[0066] In some embodiments, the battery housing 21 may include a first housing and a second housing. The first housing and the second housing are fastened together, thereby forming a closed space inside the battery housing 21 to accommodate the aforementioned battery cells 221 or battery cell assemblies 22; wherein, "closed" here means covered or closed, and the closed position may be sealed or not sealed. It is understood that the first housing and the second housing may each have an opening, thereby forming the aforementioned closed space by fastening together through their respective openings; of course, it is also possible that only one of the first housing and the second housing has an opening, and this embodiment is not limited to this. The battery housing 21 may include a top cover, a frame, and a bottom plate, the top cover and the bottom plate being connected to the frame respectively, thereby forming a closed space inside the battery housing 21 to accommodate the aforementioned battery cells 221 or battery cell assemblies 22; the aforementioned first housing may be a top cover (or a bottom plate), and the second housing may be a combination of a frame and a bottom plate (or a frame and a top cover) with an opening.

[0067] In some embodiments, the battery device may be a battery pack, which may include a battery housing 21 and at least one battery cell assembly 22, the battery cell assembly 22 being housed within the battery housing 21. In some embodiments, the battery housing 21 may be part of the chassis structure of the vehicle, the electrical device 10; for example, the top cover of the battery housing 21 may be at least part of the vehicle's floor, or the frame of the battery housing 21 may be at least part of the vehicle's crossbeams and longitudinal beams.

[0068] In some embodiments, the battery device 20 may also refer to an energy storage device, which may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple individual battery cells 221, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device. The energy storage device may include a battery enclosure 21, with a door on at least one side. The energy storage device may take the form of an energy storage container, an energy storage cabinet, etc.

[0069] Reference Figure 3 The aforementioned battery cell 221 includes a positive electrode terminal 227 (also called a terminal post), a negative electrode terminal 227, a bare cell 225, and an electrolyte, etc. The battery cell 221 can be charged and discharged through an electrochemical reaction. The battery cell 221 can be configured as a prismatic battery, a cylindrical battery, a pouch battery, or a strip battery, etc. Further, the battery cell 221 may include a casing 222, a top cover 223, an adapter plate 224, and a bare cell 225; wherein the bare cell 225 can be formed from electrode sheets through subsequent winding, stacking, and other processes. The bare cell 225 is housed within the casing 222 and has two tabs 226 corresponding to the positive and negative electrodes, respectively; the adapter plate 224 connects different bare cells 225 through the tabs 226, and the adapter plate 224 is also connected to the electrode terminals 227 provided on the top cover 223.

[0070] In the battery cell assembly 22, the electrode terminals 227 can be connected in series, parallel or mixed form to the individual battery cells 221 by connecting to the external busbars.

[0071] Reference Figure 4 ,in Figure 4 A schematic diagram of the electrode cutting device 40 in one embodiment is shown; furthermore, Figure 4 The X-axis direction in the following figures can be understood as the front-back direction. Figure 4 The Z-axis direction in the following figures can be understood as the up-down direction; the electrode cutting device 40 includes a slitting device 41, a conveying device 42, and a removing device 43. The slitting device 41 is used to slit the strip electrode 30 into at least two electrode strips 31, for example... Figure 4 The strip electrode 30 is cut into two upper and lower electrode strips 31; the conveying device 42 is used to convey the strip electrode 30 and the electrode strips 31, for example along... Figure 4It is transported in the direction of the thick solid arrow in [the figure]; the conveying device 42 is configured such that the pole piece strip 31 is arranged in a meandering manner in the tape running direction to form a projection overlapping area A in the projection along the gravity direction; the deburring device 43 is used to deburr the pole piece strip 31 conveyed by the conveying device 42 through a preset position X3; when projected along the gravity direction, the projection X3 of the preset position is located outside the projection overlapping area A.

[0072] Among them, the strip-shaped pole piece 30 corresponding to the pole piece cutting device 40 can be understood as a three-layer composite structure including a current collector and two-sided coatings (active material coatings) after processes such as slurry coating, drying, and rolling; in some embodiments, an insulating coating can also be provided at the outer position of the active material coating on the same surface of the current collector. Among them, as the positive strip-shaped pole piece 30, usually an aluminum foil or a composite foil containing an aluminum layer is used as the current collector, and active materials such as lithium iron phosphate, lithium nickel cobalt manganate, or lithium nickel cobalt aluminate are coated on the current collector; as the negative strip-shaped pole piece 30, usually a copper foil or a composite foil containing a copper layer is used as the current collector, and active materials such as graphite or a structure similar to graphite are coated on the current collector. In addition, the pole piece strip 31 formed by the pole piece cutting device 40 can be formed into the above-mentioned bare battery cell through subsequent processes such as winding and stacking; further, for a wound battery, the pole piece strip 31 can be further slit and segmented according to the designed width and then wound; for a stacked battery, the pole piece strip 31 is correspondingly cut into pieces and then stacked.

[0073] The conveying device 42 can be understood as a device capable of conveying the strip-shaped pole piece 30 and the pole piece strip 31 obtained by slitting; the conveying device 42 can include a plurality of roller members, and the axial direction of each roller member can be perpendicular to Figure 4 the XZ plane in [the figure]. It can be understood that the pole piece cutting device 40 can also include a frame, and each roller member of the conveying device 42 can be rotatably connected to the frame respectively. Among them, by setting the arrangement of the pole piece strip 31 around each roller member, the pole piece strip 31 can be arranged in a meandering manner in the tape running direction, for example, making the pole piece strip Figure 4 substantially in a figure-eight shape within the projection overlapping area A in [the figure]. Among them, the projection overlapping area A can be understood as the area where the pole piece strip 31 forms a projection overlap in the gravity direction, and the gravity direction can refer to the downward direction of the Z axis in the figure. At this time Figure 4 can be understood as the front view of the pole piece cutting device 40; referring to Figure 4 , the left edge position of the projection overlapping area A is X1, and the right edge position of the projection overlapping area A is X2. It can be understood that Figure 4In the example, the two electrode strips 31 can each form a projection overlap area A. That is, the conveying device 42 is configured to arrange the electrode strips 31 in a detour in the conveying direction to form a projection overlap area by projection along the gravity direction. This can be understood as the conveying device 42 contacting and conveying the electrode strips 31 through its own components, and making the conveyed electrode strips 31 have a detour shape in the idle state. This detour shape satisfies the condition that the projection of the electrode strips 31 along the gravity direction can form an overlap area.

[0074] In some embodiments, the electrode cutting equipment 40 may further include an unwinding device and a rewinding device. The unwinding device is used to output the strip electrode 30 to the conveying device 42, and the rewinding device is used to rewind the electrode slits 31. The unwinding device, slitting device 41, projected overlap area A, removal device 43, and rewinding device may be arranged sequentially along the belt travel direction of the strip electrode 30, thereby realizing the conveying of the strip electrode 30 and the electrode slits 31. It is understood that the electrode cutting equipment 40 may also exclude the unwinding and rewinding devices, which may be separately equipped according to the equipment conditions at the production site.

[0075] The slitting device 41 can be understood as a device capable of slitting the strip electrode 30 into electrode strips 31. The slitting device 41 may include a slitting head, a laser cutter, etc. The slitting device 41 can slit the strip electrode 30 into two electrode strips 31 (one out of two), three electrode strips 31 (one out of three), four electrode strips 31 (one out of four), etc. This embodiment does not limit the number of strips.

[0076] Furthermore, the preset position X3 for burr removal by the burr removal device 43 can be fixed relative to the electrode cutting device 40. When a specific part (with burrs) of the electrode slitting 31 passes through the preset position X3, the burr removal device 43 removes the burrs. In cases where the conveyor speed is relatively slow, the burrs can be removed manually by the operator using the burr removal device 43. Alternatively, the conveying of the electrode slitting 31 can be paused to remove the burrs upon detection. Furthermore, other existing methods can also be used to remove burrs, and this embodiment does not limit this approach.

[0077] Since the electrode strip 31 is formed by cutting the strip electrode 30 by the slitting device 41, and the removal device 43 is used to remove burrs from the electrode strip 31 that is conveyed by the conveying device 42 through the preset position X3, the burr removal process of the removal device 43 can be understood as being performed after the slitting process of the slitting device 41 and in the path of the conveying device 42 conveying the electrode strip 31, corresponding to the same absolute position of the electrode strip 31.

[0078] The removal device 43 can be understood as a device capable of removing burrs, including but not limited to cutting tools, grinding tools, etc. Furthermore, the slitting device 41 is used to slit the strip electrode 30 into at least two electrode strips 31, and the removal device 43 is used to remove burrs from the electrode strips 31. This can be understood as the removal device 43 being located downstream of the slitting device 41 in the conveying direction. On the other hand, in the conveying direction, the removal device 43 can be located downstream of the projection overlap area A; of course, the removal device 43 can also be located upstream of the projection overlap area A, and this embodiment does not limit this.

[0079] Based on the above analysis, it can be seen that when the electrode cutting equipment 40 in this embodiment is in use, the slitting device 41 cuts the strip electrode 30 into at least two electrode strips 31, thereby improving the overall production efficiency. For example, it facilitates synchronous coating of the coating equipment and synchronous drying of the oven. The conveying device 42 arranges the electrode strips 31 in a meandering manner in the conveyor direction to form a projected overlap area A, which helps to improve the space utilization of the electrode cutting equipment 40. Figure 4 The electrode cutting device 40 in the middle reduces the space occupied in the X-axis direction. Projecting along the direction of gravity, the projection of the preset position X3 for burr removal is located outside the projection overlap area A. This not only removes burrs from the electrode strips 31 that have passed through the preset position X3, but also helps to prevent the removed burrs from falling onto the electrode strips 31. For example, it helps to prevent the burrs removed at the preset position X3 from falling onto the electrode strips 31 in the projection overlap area A, thus preventing the fallen burrs from becoming new burrs on the electrode strips 31, thereby reducing burrs.

[0080] Understandably, the form of the burrs that fall off varies depending on the form of the removal device 43; for example, the burrs that fall off can be barbed (e.g., removed directly by cutting), particulate (e.g., removed by grinding), or beaded (e.g., formed by laser melting), etc.

[0081] In some implementations, refer to Figure 4 and Figure 5 , Figure 5 A schematic diagram of the structure of the first detection device 44 in this embodiment is shown, wherein Figure 5 The Y-axis direction in the subsequent accompanying diagrams can be understood as the left-right direction; furthermore, in Figure 4 , Figure 5In the accompanying drawings, the length direction of the strip electrode 30 and the length direction of the electrode strips 31 are respectively set along the arrow directions in the figures; the width direction of the strip electrode 30 and the width direction of the electrode strips 31 are respectively set along the Y-axis direction in the figures; the thickness direction of the strip electrode 30 and the thickness direction of the electrode strips 31 are respectively parallel to the XZ plane in the figures; wherein, the electrode cutting equipment 40 further includes a first detection device 44, which is used to detect burrs 32 on the electrode strips 31 (see schematic diagram of burrs 32). Figure 7 The first detection device 44 is electrically connected to the controllable terminal of the removal device 43, and the removal device 43 is used to remove burrs according to the burr detection signal of the first detection device 44.

[0082] The first detection device 44 can be understood as a device capable of detecting burrs 32. For example, the first detection device 44 may include a first vision camera, and it may also include a first light source. The first vision camera can be configured as an area scan camera, where the sensor arranges pixels in a matrix, and the sensor directly outputs a frame image after row exposure or frame exposure. Alternatively, the first vision camera can be configured as a line scan camera, where the sensor typically has only one (or two to three) rows of pixels, and the line scan camera operates similarly to a scanner, cyclically exposing the rows of pixels. Furthermore, in terms of the image sensor, the first vision camera can be configured as a CCD camera (Charge Coupled Device), a CMOS camera (Complementary Metal Oxide Semiconductor), etc.

[0083] When the first detection device 44 includes a first vision camera, it may also include a corresponding image recognition device to identify burrs in the image using existing image recognition technology. It is understood that the burr detection signal of the first detection device 44 may include information about the presence or absence of burrs, their location, and the size of the burrs themselves.

[0084] On the other hand, for the controllable end of the removal device 43, for example, the removal action of the removal device 43 can be driven by a drive device (e.g., a motor, a hydraulic cylinder, a laser excitation mechanism, etc.); in addition, the first detection device 44 can be electrically connected to the drive device to generate a drive signal based on the burr detection signal mentioned above.

[0085] In some embodiments, the electrode cutting device 40 may further include a device controller. The signal input terminal of the device controller may be electrically connected to the first detection device 44, and the signal output terminal of the device controller may be electrically connected to the controllable terminal of the removal device 43. The device controller may store a preset corresponding program, thereby ensuring that the input burr detection signal corresponds to the drive signal of the removal device 43. Furthermore, the image recognition device may be located within the device controller. It is understood that the device controller may include a host computer and a slave device. The host computer can be understood as a computer system with strong computing and data processing capabilities, including but not limited to personal computers, industrial computers, or servers. The slave device is typically configured as a device or controller directly connected to hardware such as sensors and actuators in the control system. The hardware of the slave device typically includes microcontrollers, PLCs (Programmable Logic Controllers), embedded control boards, etc.

[0086] Of course, if the electrode cutting equipment 40 does not include the aforementioned device controller, a corresponding signal conversion circuit, such as a signal amplification circuit or a judgment circuit, can be set between the controllable end of the first detection device 44 and the removal device 43 to realize the conversion between the burr detection signal and the drive signal of the removal device 43.

[0087] In this embodiment, the electrode cutting device 40 can provide more information about the burrs through the first detection device 44, such as the presence or absence of the burrs, their location, and their size. As a result, the removal device 43 can remove the burrs more accurately based on the burr detection signal from the first detection device 44. For example, it can perform the removal process more accurately based on the presence or absence of the burrs, remove them more accurately in terms of orientation based on the location information of the burrs, and provide removal power more accurately based on the size information of the burrs.

[0088] In some implementations, refer to Figure 4 Along the stripping direction of the electrode slits 31, for example, along the direction of the thick solid arrow in the figure, at least a portion of the removal device 43 is located on one side of the projection overlap area A, for example, on the right side in the figure; wherein, the removal device 43 may be located in Figure 4The X3 position is entirely outside the projection overlap area A; of course, a portion of the removal device 43 may also be located outside the projection overlap area A, and this embodiment does not limit this. Furthermore, at least a portion of the first detection device 44 is located on the other side of the projection overlap area A, for example, on the left side in the figure; wherein, the first detection device 44 may perform burr detection at position X1 in the figure; furthermore, the first detection device 44 may be partially or entirely located outside the projection overlap area A, and this embodiment does not limit this.

[0089] Of course, at least a portion of the removal device 43 can be located on the left side of the projection overlap area A, and at least a portion of the first detection device 44 can be located on the right side of the projection overlap area A. This embodiment does not limit this.

[0090] It is understandable that the first detection device 44 detects burrs 32 on the electrode slitting 31 (see...). Figure 7 The burr detection signal is generated, and the burr removal device 43 removes burrs based on this signal. Therefore, it can be understood that the first detection device 44 is located upstream of the removal device 43 in the belt conveying direction. Upstream can be understood as the area closer to the unwinding device on the belt conveying path of the electrode slitting 31, and downstream can be understood as the area closer to the winding device on the belt conveying path of the electrode slitting 31. Unlike upstream and downstream, one side of the projection overlap area A is relative to the projection area. Since the electrode slitting 31 is arranged in a circuitous manner in the projection overlap area A, the removal device 43 and the first detection device 44 are located on opposite sides of the projection overlap area A, and the upstream / downstream relationship between the removal device 43 and the first detection device 44 is not restricted.

[0091] For example, refer to Figure 4 When the removal device 43 is located to the right of the projection overlap area A and at least a portion of the first detection device 44 is located to the right of the projection overlap area A, the first detection device 44 is upstream of the removal device 43 in the conveying direction relative to the uppermost portion of the electrode strip 31 in the figure. Furthermore, when the removal device 43 is located to the left of the projection overlap area A and at least a portion of the first detection device 44 is located to the right of the projection overlap area A, referring to... Figure 4 The second layer of the intermediate electrode sheet slitting 31 is located upstream of the removal device 43 in the belt carrying direction by the first detection device 44.

[0092] In this embodiment, since the electrode strips 31 are arranged in a roundabout manner in the projection overlap area A, for example, in a roughly U-shaped or roundabout manner, the electrode strips 31 take a relatively long time to pass through the projection overlap area A. Along the carrying direction of the electrode strips 31, the removal device 43 and the first detection device 44 are located on both sides of the projection overlap area A, which helps to increase the response time of the removal device 43 to the burr detection signal of the first detection device 44, and helps to avoid the removal device 43 not responding in time, resulting in the omission of burr removal.

[0093] In some embodiments, the electrode cutting device 40 further includes a position recording device for recording the detection position of the first detection device 44 on the detection part of the electrode slitting 31. The position recording device is electrically connected to the controllable end of the removal device 43. When the first detection device 44 detects a burr 32, the removal device 43 is used to remove the burr when the detection part moves to the preset position based on the conveyor speed of the electrode slitting 31 and the distance information between the detection position and the preset position.

[0094] The detection area of ​​the electrode slit 31 can be understood as a specific part of the electrode slit 31, such as a specific segment. The detection position of the first detection device 44 at the detection area of ​​the electrode slit 31 can be understood as the position of the specific detection area relative to the electrode slit 31 recorded by the position recording device when the first detection device 44 performs burr detection on the detection area. In addition, the distance information between the detection position and the preset position X3 may include, for example, the total length of the electrode slit 31 between the detection position X1 and the preset position X3 of the first detection device 44. The total length of the electrode can be understood as the total distance traveled by a specific position (e.g., a specific segment) on the electrode slit 31 from the detection position X1 to the preset position X3. Due to the circuitous arrangement of the electrode slit 31, the total length of the electrode is greater than the straight-line distance between the detection position X1 and the preset position X3. Therefore, when the conveyor speed of the electrode strip 31 and the aforementioned distance information are known (e.g., they can be preset), it is possible to know when a specific part (e.g., a specific section) on the electrode strip 31 moves to the preset position X3, thereby enabling the removal device 43 to perform burr removal at the corresponding time.

[0095] For example, the electrode cutting equipment 40 may include a drive motor for driving the conveying device 42 for conveying; correspondingly, the position recording device may include a position encoder disposed on the drive motor. When the first detection device 44 detects the detection area of ​​the electrode slitting 31, the position encoder records the position of the detection area to form the aforementioned detection position, thereby facilitating efficient provision of position information for burr detection and reducing the overall cost of burr removal by the electrode cutting equipment 40 through the position encoder.

[0096] As can be seen from the above description, when the first detection device 44 detects a burr, the removal device 43 removes the burr when the detection part moves to the preset position X3 based on the conveyor speed of the electrode slitting 31 and the distance information between the detection position X1 and the preset position X3. This helps to improve the positional accuracy of burr removal and facilitates the coordinated conveying of the electrode slitting 31 and burr removal.

[0097] When the slitting device 41 slits the strip electrode 30 into electrode strips 31, the position recording device can record the position information of the burrs on the slitting edge of the electrode strip 31, wherein the slitting edge is parallel to the belt travel direction of the electrode strip 31.

[0098] In some implementations, refer to Figure 6 and Figure 7 The removal device 43 includes an energy transmitter for sending energy to the burrs 32 on the electrode slit 31 to melt the burrs 32; wherein Figure 6 This diagram illustrates the structure of the removal device 43 and the cleaning device 46 (details to follow) included in the electrode cutting device 40 of this embodiment. Figure 7 This illustration shows a schematic diagram of the removal device 43 in this embodiment; in some embodiments, refer to Figure 7 and Figure 8 The energy transmitting component is used to melt the burr 32 to form a molten bead 33.

[0099] The energy transmitter can be understood as a device that melts the burr 32 by sending energy to it, thereby increasing the energy of the burr 32. The burr removal method corresponding to the energy transmitter is different from mechanical cutting and mechanical grinding. For example, the energy transmitter may include at least one of a laser generator, an arc generator, and a magnetic induction generator, thereby sending laser energy, arc energy, or magnetic energy to the burr 32 (the metallic burr 32 heats up through the principle of magnetic induction), thereby melting the burr 32 to form a molten bead 33.

[0100] also, Figure 6 The size of the burrs in 32 Figure 7 The size of the molten bead 33 is for illustrative purposes only, to clearly understand the location of the burr 32, the location of the molten bead 33, and the operation of the removal device 43, and does not represent the actual size of the burr 32 and the molten bead 33.

[0101] In this embodiment, the energy transmitting element of the removal device 43 melts the burrs 32 on the electrode slit 31 by sending energy to them, thereby facilitating the removal of the burrs 32 through localized action and thus helping to avoid accidental damage to other parts of the electrode slit 31 due to large-area processing of the electrode slit 31.

[0102] Taking aluminum foil as an example of the current collector used in the electrode slitting 31, for micron-level burrs such as aluminum foil wire drawing on the edge of the electrode slitting 31, the energy transmitting component of the removal device 43 can melt the burrs 32 to make the edge of the electrode slitting 31 relatively flat after the burrs are removed.

[0103] In some implementations, refer to Figure 7 The electrode cutting device 40 includes a first guide rod 47, which extends along the width direction of the electrode slits 31, for example, along the Y-axis direction shown in the figure; it can be understood that the length direction of the first guide rod 47 is along the width direction of the electrode slits 31. A removal device 43 is mounted on the first guide rod 47, including direct mounting and indirect mounting through other components. The removal device 43 is movably connected to the first guide rod 47 along its extension direction.

[0104] The first guide rod 47 can be understood as a rod that guides the movement of the removal device 43 (moving along the width direction of the electrode strips 31). The cross-sectional shape of the first guide rod 47 includes, but is not limited to, a circle, an ellipse, a rectangle, or a rounded rectangle. The first guide rod 47 can be configured as a guide rail, etc. Furthermore, the removal device 43 can be installed with the first guide rod 47 through sliding connection, insertion, snap-fit, or other methods.

[0105] In this embodiment, the first guide rod 47 extends along the width direction of the electrode slit 31, and the removal device 43 is movably connected to the first guide rod 47 along the extension direction of the first guide rod 47, so that the removal device 43 can change its position along the width direction of the electrode slit 31, and thus the removal device 43 can be applied to electrode slits 31 of different width specifications.

[0106] In some implementations, refer to Figure 6 , Figure 7 and Figure 8 The electrode cutting device 40 also includes a cleaning device 46, wherein Figure 8 A schematic diagram of the cleaning device 46 in this embodiment is shown. The cleaning device 46 is used to remove burrs 32 that have detached from the electrode strip 31, such as removing burrs 32 in the form of the aforementioned molten beads 33. The cleaning device 46 includes at least one of an air knife, a brush, and a negative pressure suction element, thereby removing the detached burrs 32 by means of air pressure blowing, brushing, negative pressure suction, etc.

[0107] In this embodiment, the cleaning device 46 removes the burrs 32 that have detached from the electrode slitting 31, thereby improving the cleanliness of the electrode slitting 31 and reducing the adverse effects of foreign matter on the quality of the electrode slitting 31.

[0108] In some implementations, refer to Figure 6 and Figure 8 The electrode cutting device 40 includes a second guide rod 48, which extends along the width direction of the electrode slitting 31, for example, along the Y-axis direction in the figure; it can be understood that the length direction of the second guide rod 48 is along the width direction of the electrode slitting 31. A cleaning device 46 is mounted on the second guide rod 48, including direct mounting and indirect mounting through other components. The cleaning device 46 is movably connected to the second guide rod 48 along its extension direction.

[0109] The second guide rod 48 can be understood as a rod that guides the movement of the cleaning device 46 (moving along the width direction of the electrode strips 31). The cross-sectional shape of the second guide rod 48 includes, but is not limited to, a circle, an ellipse, a rectangle, or a rounded rectangle. The second guide rod 48 can be configured as a guide rail, etc. Furthermore, the cleaning device 46 can be installed with the second guide rod 48 through sliding connection, insertion, snap-fit, or other methods.

[0110] In this embodiment, the second guide rod 48 extends along the width direction of the electrode slit 31, and the cleaning device 46 is movably connected to the second guide rod 48 along the extension direction of the second guide rod 48, so that the cleaning device 46 can change its position along the width direction of the electrode slit 31, and thus the cleaning device 46 can be applied to electrode slits 31 of different width specifications.

[0111] In some implementations, refer to Figure 4 The electrode cutting device 40 also includes a partition 45, which is provided between two adjacent electrode strips 31 in the direction of gravity. This can be understood as the partition 45 being provided between two adjacent electrode strips 31, one above the other. When projected along the direction of gravity, for example, along the vertical direction shown in the figure, the partition 45 covers the lower electrode strip 31 in the width direction of the electrode strip 31. In some embodiments, for two adjacent electrode strips 31 in the direction of gravity, when projected along the direction of gravity, the projection of the removal device 43 corresponding to the upper electrode strip 31 at least partially falls within the projection of the partition 45, thereby preventing burrs detached at the removal device 43 from falling onto the lower electrode strip 31. In some embodiments, refer to... Figure 4 The partition 45 extends from the slitting device 41 through the projection overlap area A of the upper and lower electrode strips 31 and their respective removal devices 43, thereby blocking the falling burrs at more locations.

[0112] In this embodiment, the partition 45 covers the lower electrode strip 31 in the width direction of the electrode strip 31, thereby preventing the removed burrs from falling from the top onto the lower electrode strip 31. This helps to prevent the falling burrs from causing edge damage to the membrane area of ​​the lower electrode strip 31, and also helps to prevent the falling burrs from adhering to the lower electrode strip 31, that is, it helps to prevent the formation of new burrs on the lower electrode strip 31 after the burrs fall off.

[0113] In some embodiments, the electrode cutting device 40 may further include a second detection device for detecting burrs 32 on the electrode slitting 31; the second detection device is located downstream of the removal device 43 along the belt-carrying direction of the electrode slitting 31.

[0114] The second detection device can be understood as a device capable of detecting burrs 32. For example, the second detection device may include a second vision camera, and it may also include a second light source. The second vision camera can be configured as the aforementioned area scan camera or line scan camera. Alternatively, from the perspective of the image sensor, the second vision camera can be configured as the aforementioned CCD camera, CMOS camera, etc.

[0115] In this embodiment, the second detection device is located downstream of the removal device 43 along the belt-carrying direction of the electrode slitting 31, thereby enabling the detection of the burr removal effect of the removal device 43, which is beneficial for detecting burrs that have not been removed and for timely processing.

[0116] Among them, with Figure 4 For example, in the electrode cutting equipment 40 described above, the two electrode strips 31 obtained after being cut by the slitting device 41 are carried in two separate parts, upper and lower. The upper and lower electrode strips 31 can be exactly the same in width. The electrode strips 31 first pass through the first detection device 44, which detects both sides of the electrode strips 31 (e.g., by taking pictures with the first camera of the first detection device 44) to confirm the burr position. The detection can be determined according to the set specifications. After that, the burr position is transmitted to the subsequent removal device 43 (e.g., a hot melt burr removal device). The removal device 43 heats the burr quickly and accurately using laser, electric arc, magnetic induction, etc., to melt the burr. The subsequent cleaning device 46 (dust removal air knife, brush, or negative pressure dust collection) can remove the melted burr. After that, the burr removal is re-inspected by the second detection device before winding. If the burr re-inspection is qualified, the winding device completes the cutting process.

[0117] Reference Figures 4 to 8In one embodiment, the electrode cutting device 40 includes a slitting device 41, a conveying device 42, and a removal device 43. The slitting device 41 is used to slit the strip electrode 30 into at least two electrode strips 31. The conveying device 42 is used to convey the strip electrode 30 and the electrode strips 31. The conveying device 42 is configured such that the electrode strips 31 are arranged in a meandering manner in the conveying direction to form a projection overlap area along the direction of gravity. The removal device 43 is used to remove burrs 32 from the electrode strips 31 that have passed through a preset position. The projection is made along the direction of gravity, and the projection at the preset position is located outside the projection overlap area. The electrode cutting device 40 also includes a first detection device 44, which is used to detect burrs 32 on the electrode strips 31. The first detection device 44 is electrically connected to the controllable end of the removal device 43, and the removal device 43 is used to remove burrs 32 according to the burr detection signal of the first detection device 44. Along the travel direction of the electrode slits 31, at least a portion of the removal device 43 is located on one side of the projection overlap area, and at least a portion of the first detection device 44 is located on the other side of the projection overlap area. The removal device 43 includes an energy transmitter for sending energy to the burrs 32 on the electrode slits 31 to melt the burrs 32. The energy transmitter is used to melt the burrs 32 to form molten beads 33, and the energy transmitter includes at least one of a laser generator, an arc generator, and a magnetic induction generator. The electrode cutting device 40 also includes a partition 45, which is provided between two adjacent electrode slits 31 in the gravity direction; when projected along the gravity direction, the partition 45 covers the lower electrode slits 31 in the width direction of the electrode slits 31. The electrode cutting equipment 40 includes a first guide rod 47 extending along the width direction of the electrode slits 31; a removal device 43 is mounted on the first guide rod 47 and movably connected to the first guide rod 47 along its extension direction. The electrode cutting equipment 40 also includes a cleaning device 46 for removing burrs 32 detached from the electrode slits 31; the cleaning device includes at least one of an air knife, a brush, and a negative pressure suction device. The electrode cutting equipment 40 includes a second guide rod 48 extending along the width direction of the electrode slits 31; the cleaning device 46 is mounted on the second guide rod 48 and movably connected to the second guide rod 48 along its extension direction. The electrode cutting equipment 40 also includes a second detection device for detecting burrs 32 on the electrode slits 31; the second detection device is located downstream of the removal device 43 along the conveying direction of the electrode slits 31.The electrode cutting equipment 40 also includes a position recording device, which records the detection position of the detection part of the electrode slitting 31 by the first detection device 44. The position recording device is electrically connected to the controllable end of the removal device 43. When the first detection device 44 detects a burr 32, the removal device 43 removes the burr 32 when the detection part moves to the preset position based on the conveying speed of the electrode slitting 31 and the distance information between the detection position and the preset position. The electrode cutting equipment 40 includes a drive motor for conveying by the drive conveying device 42, and the position recording device includes a position encoder disposed on the drive motor. When the first detection device 44 detects the detection part of the electrode slitting 31, the position encoder records the position of the detection part to form the detection position. The electrode cutting equipment 40 also includes an unwinding device and a winding device. The unwinding device is used to output the strip electrode 30 to the conveying device 42, and the winding device is used to wind up the electrode strip 31. The unwinding device, the slitting device 41, the removal device 43 and the winding device are arranged in sequence along the belt direction of the strip electrode 30.

[0118] It is understandable that since the battery production line adopts all the technical solutions of all embodiments of the above-mentioned electrode cutting equipment, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be elaborated here.

[0119] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An electrode cutting device, characterized in that, The electrode cutting equipment includes: The slitting device is used to slit the strip electrode sheet into at least two electrode strips; A conveying device is used to convey the strip electrode sheet and the electrode sheet slits; the conveying device is configured such that the electrode sheet slits are arranged in a circuitous manner in the belt-carrying direction to form a projection overlap area along the gravity direction. Deburring device, the deburring device being used to slit the electrode sheet that has been conveyed by the conveying device through a preset position to remove burrs; Projection is made along the direction of gravity, and the projection at the preset position is located outside the projection overlap area.

2. The electrode cutting equipment as described in claim 1, characterized in that, The electrode cutting equipment further includes a first detection device for detecting burrs on the electrode strips; the first detection device is electrically connected to the controllable end of the removal device, and the removal device is used to remove burrs according to the burr detection signal of the first detection device.

3. The electrode cutting equipment as described in claim 2, characterized in that, Along the stripping direction of the electrode sheet, at least a portion of the removal device is located on one side of the projection overlap area, and at least a portion of the first detection device is located on the other side of the projection overlap area.

4. The electrode cutting equipment as described in any one of claims 1 to 3, characterized in that, The removal device includes an energy transmitter for sending energy to the burrs on the electrode slits to melt the burrs.

5. The electrode cutting equipment as described in any one of claims 1 to 3, characterized in that, The electrode cutting equipment also includes a partition, which is provided between two adjacent electrode strips in the direction of gravity; Projected along the direction of gravity, the partition covers the lower electrode strips in the width direction of the electrode strips.

6. The electrode cutting equipment as described in any one of claims 1 to 3, characterized in that, The electrode cutting device includes a first guide rod that extends along the width direction of the electrode strips; the removal device is mounted on the first guide rod and is movably connected to the first guide rod along its extension direction.

7. The electrode cutting equipment according to any one of claims 1 to 3, characterized in that, The electrode cutting equipment also includes a cleaning device for removing burrs that have detached from the electrode strips.

8. The electrode cutting equipment as described in claim 7, characterized in that, The electrode cutting device includes a second guide rod that extends along the width direction of the electrode strips; the cleaning device is mounted on the second guide rod and is movably connected to the second guide rod along its extension direction.

9. The electrode cutting equipment as described in any one of claims 1 to 3, characterized in that, The electrode cutting equipment further includes a second detection device for detecting burrs on the electrode slits; the second detection device is located downstream of the removal device along the belt travel direction of the electrode slits.

10. The electrode cutting equipment as described in claim 2 or 3, characterized in that, The electrode cutting equipment further includes a position recording device, which is used to record the detection position of the detection part of the electrode slitting by the first detection device, and the position recording device is electrically connected to the controllable end of the removal device. If the first detection device detects a burr, the removal device is used to remove the burr when the detection part moves to the preset position, based on the belt speed of the electrode slitting and the distance information between the detection position and the preset position.

11. The electrode cutting equipment as described in claim 10, characterized in that, The electrode cutting equipment includes a drive motor that drives the conveying device to convey the electrode, and the position recording device includes a position encoder disposed on the drive motor. When the first detection device detects the detection area of ​​the electrode strip, the position encoder records the position of the detection area to form the detection position.

12. A battery production line, characterized in that, The battery production line includes the electrode cutting equipment as described in any one of claims 1 to 11.

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