CN216094577U - Pole piece coating system and pole piece thinning device - Google Patents
Pole piece coating system and pole piece thinning device Download PDFInfo
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- CN216094577U CN216094577U CN202122547769.3U CN202122547769U CN216094577U CN 216094577 U CN216094577 U CN 216094577U CN 202122547769 U CN202122547769 U CN 202122547769U CN 216094577 U CN216094577 U CN 216094577U
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Abstract
The utility model relates to a pole piece coating system and a pole piece thinning device. A pole piece skiving apparatus comprising: a laser for emitting laser light; the moving mechanism is connected with the laser; and a driving mechanism connected with the moving mechanism; under the driving of the driving mechanism, the moving mechanism is controlled to drive the laser to move in a coating area of the pole piece until the laser thins the edge of the coating area. A pole piece coating system comprises the pole piece thinning device. According to the pole piece coating system and the pole piece thinning device, the moving mechanism can drive the laser to move, so that the position of the laser is changed, and the laser is more accurately aligned to the thinning position; the thinning width of the edge can be adjusted by adjusting the size of the laser spot, and the thinning depth of the edge can be adjusted by adjusting the laser power. The edge of the coating area is thinned by laser to improve the edge bulging phenomenon, and the thinning size of the edge of the coating area is accurately controlled.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a pole piece coating system and a pole piece thinning device.
Background
In the preparation process of the pole piece, the slurry is coated on the base material to form a wet coating area with uniform thickness, and then the wet coating area is dried by a drying box, so that the positive and negative electrode materials in the coating area can be adhered on the base material after the drying is completed. In the baking process of the slurry coated to the base material, the solid content at the edge of the coating area is faster than the solid content at the middle part of the coating area due to the fact that the edge of the coating area is thinner and the drying speed is fast, so that the surface tension of the slurry at the edge of the coating area is larger than that of the middle part of the coating area, the slurry flows to the edge of the coating area, and the edge bulging phenomenon of the pole piece after the pole piece is dried out of the oven can occur.
In order to solve the edge bulging phenomenon, the edge of a coating area is thinned mainly through a gasket in a die head and control equipment parameters during extrusion coating. However, due to poor control precision, slurry fluctuation of a thinning area on the pole piece is large, so that the width and the depth of the thinning area cannot meet requirements, and the edge bulging problem cannot be effectively solved finally.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a pole piece coating system and a pole piece thinning device for solving the problem of poor control precision of the thinning of the pole piece coating area.
A pole piece skiving device, the pole piece skiving device comprising:
a laser for emitting laser light;
the moving mechanism is connected with the laser; and
the driving mechanism is connected with the moving mechanism;
wherein, under the driving of the driving mechanism, the moving mechanism is controlled to drive the laser to move in the coating area of the pole piece until the edge of the coating area is thinned by the laser.
According to the pole piece thinning device, the moving mechanism can drive the laser to move, so that the position of the laser is changed, and the laser is more accurately aligned to the thinning position; the thinning width of the edge can be adjusted by adjusting the size of the laser spot, and the thinning depth of the edge can be adjusted by adjusting the laser power. The edge of the coating area is thinned by laser to improve the edge bulging phenomenon, and the thinning size of the edge of the coating area is accurately controlled.
In one embodiment, the device further comprises a deviation-correcting sensor and a controller which are electrically connected with each other, the deviation-correcting sensor is used for detecting the real-time position of the edge in the film coating area and generating a corresponding position signal, and the controller is used for receiving the position signal and controlling the driving mechanism and the transmission mechanism, so that the laser is controlled to move along with the edge in the film coating area, and the laser is enabled to act on the edge in the film coating area all the time. Through this setting, the inductor of rectifying can real-time detection treat the position of skiving, and the controller can be according to the operation of received position signal control actuating mechanism, and drive mechanism drives the laser instrument and removes to treating the position of skiving under actuating mechanism's the driving, and the position accuracy of skiving is higher.
In one embodiment, the coating area has a first edge and a second edge, the first edge and the second edge are located on different sides of the coating area, and the first edge and the second edge are respectively provided with at least one deviation-correcting sensor. Through this setting, the inductor of rectifying can pinpoint the position at two edges, and the edge of being convenient for laser accuracy along the coating area is cut thin.
In one embodiment, the moving mechanism can drive the laser to move in a translation manner in the coating area under the driving of the driving mechanism. Through the setting, the position of the laser can be flexibly adjusted, so that the laser can be better aligned to the thinning position, and the requirements of different thinning widths at the edge of the coating area are met.
In one embodiment, the moving mechanism drives the laser to move in a translational manner along the length direction and/or the width direction of the coating area. Through the setting, the position of the laser can be flexibly adjusted in the length direction and/or the width direction of the coating area, so that the laser can be better aligned to the thinning position, and different thinning width requirements of the edge of the coating area are met.
In one embodiment, the moving mechanism includes a first moving assembly connected to the driving mechanism, the laser is mounted on the first moving assembly, the driving mechanism drives the first moving assembly to move, and the first moving assembly drives the laser to move in a translational manner along the width direction of the coating region. With this arrangement, the position of the laser can be flexibly adjusted in the width direction of the coating region.
In one embodiment, the first moving assembly includes a screw rod, a screw nut and a fixing seat, the laser is mounted on the fixing seat, the screw rod is fixedly connected with the fixing seat, the screw nut is connected with a driving mechanism, the driving mechanism drives the screw nut to rotate, and the screw nut drives the screw rod and the laser to move in a translational manner along the width direction of the coating area. Through the setting, the position adjustment step of the laser is simple and convenient, and the operation of a user is convenient.
In one embodiment, the moving mechanism further comprises a second moving assembly, the second moving assembly is connected with the first moving assembly, and the second moving assembly drives the first moving assembly to move up and down. In the embodiment, the laser can move in a film coating area in a translation mode and can also move in a film coating area in a lifting mode, and the position of the laser is adjusted more flexibly and conveniently.
In one embodiment, the laser is a high frequency short pulse or continuous laser. Through the arrangement, the laser has larger output power, and is beneficial to improving the laser thinning efficiency.
A pole piece coating system comprises the pole piece thinning device.
The pole piece coating system is provided with the pole piece thinning device, so that the edge bulging phenomenon can be improved, and meanwhile, the thinning size of the edge of the coating area can be accurately controlled.
Drawings
FIG. 1 is a schematic diagram of a pole piece thinning apparatus in one embodiment;
fig. 2 is a partially enlarged view of a pole piece thinning apparatus a shown in fig. 1.
Reference numerals:
10. pole pieces; 11. coating a film area; 12. an edge; 12a, a first edge; 12b, a second edge; 100. a laser; 100a, a first laser; 100b, a second laser; 101. laser; 200. a moving mechanism; 210. a screw rod; 220. a fixed seat; 300. a deviation rectifying inductor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
At present, a lithium ion battery, as an environment-friendly battery, has the advantages of high energy density, high operating voltage, high safety performance, long service life and the like, and is widely applied to electronic equipment such as mobile phones, digital cameras and the like and electric automobiles. With the increasing demand of green energy environmental protection, energy storage and utilization, and the like, lithium ion batteries become a bottleneck for solving the development of new energy.
The lithium ion battery comprises a shell, an electric core and electrolyte, wherein the electrolyte is filled in the shell, and the electric core is accommodated in the shell loaded with the electrolyte. The battery core comprises a positive plate, an isolating membrane and a negative plate which are stacked, the positive plate and the negative plate are generally prepared, then the positive plate, the isolating membrane and the negative plate are wound and assembled into the battery core, and then the subsequent processing procedures such as hot cold pressing, formation, shaping, capacity testing and the like are carried out to form a lithium ion battery finished product.
The pole piece 10 comprises a substrate and an active material layer, wherein the substrate is generally copper foil or aluminum foil, and a slurry containing the active material is required to be coated on the surface of the pole piece 10 and form a coating area 11. The coating process of the slurry is an important process in the manufacturing process of the lithium ion battery, and the performance of the battery is directly influenced by the quality of the control capability of the coating parameters.
In the slurry coating step, the slurry is often applied to a substrate by transfer coating or extrusion coating to form an active material layer. The transfer coating film width is controllable, but the transfer coating film width has the adverse effects of low coating speed, unstable coating surface density and the like. Extrusion coating can satisfy most coating demands, uses comparatively extensively, but has the coating parameter and adjusts complicacy, the high problem of control accuracy. Among them, the edge bulging problem is liable to occur in both transfer coating and extrusion coating processes.
Taking transfer coating as an example, the slurry is transfer coated on the substrate by a steel roller to form a wet coating area 11 with uniform thickness, and then the wet coating area is dried by a drying oven, so that the positive and negative electrode materials in the coating area 11 can be adhered on the substrate after the drying is completed. In the baking process of the slurry coated on the base material, because the edge 12 in the coating area 11 is thin and is dried quickly, the solid content of the edge 12 in the coating area 11 rises faster than the solid content of the middle part of the coating area 11, the surface tension of the slurry at the edge 12 of the coating area 11 is greater than the surface tension of the middle part of the coating area 11, the slurry flows to the edge 12 of the coating area 11, and the edge bulging phenomenon occurs on the pole piece 10 after the pole piece is dried in the oven.
Currently, to solve the edge bulging problem, the edge 12 of the coating region 11 is skived during extrusion coating mainly by means of shims in the die and controlling the parameters of the equipment. However, the control precision is poor, and the slurry fluctuation of the skived area on the pole piece 10 is large, so that the width and the depth of the skived area cannot meet the requirements. For example, when the width of the thinned region is too large, the area of the thinned region in the coating region 11 is too large, the coating amount of the slurry in the large region of the coating region 11 is less than that in the non-thinned region, and thus the battery capacity of the lithium ion battery is reduced, and the use safety is reduced; when the width of the skived area is too narrow, the problem of drum edge cannot be effectively solved.
When the edge bulging problem is serious, the pole piece 10 is broken, and the manufacturing process and the performance of the lithium battery are affected. The edge bulging problem can also affect the rolling process of the pole piece 10, because the thickness of the edge 12 of the film coating area 11 is a few microns or more than ten microns larger than the middle part of the film coating area 11, when the pressure of a rolling roller acts on the pole piece 10, the area with the large thickness of the edge 12 bears larger rolling force, so that the rolling compaction transverse density of the pole piece 10 is inconsistent, and the warping degree of the rolled pole piece 10 is larger to form a snake-shaped pole piece 10; meanwhile, in the subsequent technical processes of slitting or die cutting, winding and the like of the pole piece 10, the tension distribution of the pole piece 10 is unbalanced, the winding and unwinding alignment degree of the pole piece 10 cannot be guaranteed, the machining size of the pole piece 10 can be influenced, and defective products are easy to occur. Uneven thickness and compaction density of the pole piece 10 caused by the edge bulging phenomenon also affect the battery performance, and uneven current distribution may occur in the charging and discharging process, so that polarization is more easily formed. Therefore, how to effectively improve the edge bulging phenomenon of the pole piece 10 and effectively control the edge bulging thinning precision is a problem which is urgently needed to be solved at present.
Based on the above consideration, in order to effectively improve the bulging edge of the pole piece 10 and effectively control the bulging edge thinning precision, the inventor designs a pole piece 10 thinning device through intensive research.
Referring to fig. 1, an exemplary thinning apparatus for pole piece 10 includes a laser 100, a moving mechanism 200, and a driving mechanism (not shown). The laser 100 is used for emitting laser 101, the moving mechanism 200 is connected with the laser 100, and the driving mechanism is connected with the moving mechanism 200.
Referring to fig. 2 in combination, under the driving of the driving mechanism, the moving mechanism 200 can drive the laser 100 to move in the coating area 11 of the pole piece 10 until the laser 101 thins the edge 12 in the coating area 11.
Through the arrangement, the moving mechanism 200 can drive the laser 100 to move so as to change the position of the laser 100, so that the laser 101 is more accurately aligned with the thinning position; the skiving width of the edge 12 can be adjusted by adjusting the spot size of the laser 101, and the skiving depth of the edge 12 can be adjusted by adjusting the power of the laser 101. The laser 101 is used to thin the edge 12 of the coating region 11 to improve the edge curl phenomenon while more accurately controlling the thinning dimension of the edge 12 of the coating region 11.
The inventors have noticed that the edge 12 of the coating film region 11 is not straight and linear in the longitudinal direction due to the surface tension during slurry coating, and the edge 12 of the coating film region 11 is curved in a straight line or in a curved line in the longitudinal direction. If the accuracy of the thinning position of the edge 12 is to be ensured, the laser 101 cannot move straight in the longitudinal direction when thinning, so it is necessary to accurately position the edge 12 in the coating region 11 and then control the laser 101 to accurately thin along the edge 12 in the coating region 11.
In order to ensure the accuracy of the thinning position, the inventor has conducted extensive studies, and as shown in the embodiment shown in fig. 1, a deviation-rectifying sensor 300 and a controller (not shown) are further disposed in the pole piece 10 thinning apparatus, and the deviation-rectifying sensor 300 and the controller are electrically connected to each other.
In this embodiment, the controller is electrically connected to the driving mechanism. The deviation-correcting sensor 300 is used for detecting the real-time position of the edge 12 in the film-coating region 11 and generating a corresponding position signal, and the controller is used for receiving the position signal and controlling the driving mechanism and the transmission mechanism, and controlling the laser 100 to move along with the edge 12 in the film-coating region 11, so that the laser beam always acts on the edge 12 of the film-coating region 11.
Through the setting, the real-time position of the edge 12 in the film coating area 11 is sensed through the deviation-correcting sensor 300, the analog quantity signal of the deviation-correcting sensor 300 is transmitted to the controller, and the controller controls the laser 100 to move along with the edge 12 in the film coating area 11 through the driving mechanism and the transmission mechanism, so that the laser beam always acts on the edge 12 of the film coating area 11. When the edge 12 in the coating region 11 is a straight line, a curve or a curve in the length direction, the position of the laser 100 can be adjusted in time, so that the trend of the laser beam is the same as that of the edge 12, thereby improving the precision of the thinning position.
In the present embodiment, the deviation correcting sensor 300 is a position sensor. In other embodiments, the deviation sensor 300 may be a sensor integrating position and humidity, and can detect humidity in addition to detecting position. For example, when it is detected that the coating region 11 has liquid or humidity not reaching the standard, the user may be reminded to process the coating until the humidity reaches the standard and then thin the coating to ensure the safety of operation.
As shown in fig. 1, the coating area 11 has a first edge 12a and a second edge 12b, the first edge 12a and the second edge 12b are located on different sides of the coating area 11, and the first edge 12a and the second edge 12b are respectively provided with at least one deviation-correcting sensor 300.
Through the arrangement, the deviation-rectifying sensor 300 can accurately position the positions of the two edges 12, so that the laser 101 can be conveniently and accurately thinned along the edges 12 of the coating area 11.
For example, the first deskew sensor 300 can detect the location of the first edge 12a to be skived, and the second deskew sensor 300 can detect the location of the second edge 12b to be skived. When the first edge 12a is thinned, the controller can receive a position signal sent by the first deviation-rectifying sensor 300 and control the driving mechanism to operate, the driving mechanism drives the laser 100 to move to a position where the first edge 12a is to be thinned under the driving of the driving mechanism, and then the laser 101 is used for thinning the first edge 12 a. When the second edge 12b is thinned, the controller can receive a position signal sent by the second deviation-correcting sensor 300 and control the driving mechanism to operate, the driving mechanism drives the laser 100 to move to a position where the second edge 12b is to be thinned under the driving of the driving mechanism, and then the laser 101 is used for thinning the second edge 12 b.
In the embodiment shown in fig. 1, at least one laser 100 and a moving mechanism 200 are respectively disposed on different sides of the coating area 11, and the deviation-correcting sensors 300 located on the same side correspond to the laser 100 and the moving mechanism 200 located on the same side.
For example, as shown in fig. 1, a first laser 100a is disposed on a side of the first edge 12a, and the first laser 100 corresponds to the first deviation-rectifying sensor 300. A second laser 100b is disposed on a side of the second edge 12b, and the second laser 100 corresponds to the second deviation-rectifying sensor 300.
When the first edge 12a is thinned, the controller can receive a position signal sent by the first deviation-rectifying sensor 300 and control the driving mechanism to operate, the transmission mechanism drives the first laser 100 to move to a position where the first edge 12a is to be thinned under the driving of the driving mechanism, and then the laser 101 is used for thinning the first edge 12 a. When the second edge 12b is thinned, the controller can receive a position signal sent by the second deviation-correcting sensor 300 and control the driving mechanism to operate, the transmission mechanism drives the second laser 100 to move to a position where the second edge 12b is to be thinned under the driving of the driving mechanism, and then the laser 101 is used for thinning the second edge 12 b.
In other embodiments not shown in the drawings, only one laser 100 and one moving mechanism 200 may be provided, and the laser 100 is driven by the moving mechanism 200 to move to the position where the first edge 12a is to be thinned or the position where the second edge 12b is to be thinned, respectively.
As shown in fig. 1, the moving mechanism 200 can drive the laser 100 to move in a translational manner in the coating area 11 under the driving of the driving mechanism.
Specifically, the moving mechanism 200 drives the laser 100 to move in a translational manner along the length direction and/or the width direction of the coating region 11. Here, the longitudinal direction is the X direction shown in fig. 1, the width direction is the Y direction shown in fig. 1, and the depth direction is the Z direction shown in fig. 1.
In a specific embodiment, the driving mechanism is a motor or a cylinder.
In one embodiment, the movement mechanism 200 includes a first movement assembly.
In this embodiment, the first moving assembly is connected to a driving mechanism, the laser 100 is installed on the first moving assembly, the driving mechanism drives the first moving assembly to move, and the first moving assembly drives the laser 100 to move in a translational manner along the width direction of the coating area 11. Through the arrangement, the position of the laser 100 can be flexibly adjusted in the width direction of the coating area 11, so that the laser 101 can be better aligned with the thinning position, and different thinning width requirements of the edge 12 of the coating area 11 are met.
Specifically, in one embodiment, as shown in fig. 1, the first moving assembly includes a screw 210, a screw nut (not shown), and a fixing base 220. The laser 100 is mounted on the fixing base 220, the screw 210 is fixedly connected with the fixing base 220 and arranged along the width direction of the coating area 11, and the screw nut is connected with the driving mechanism.
In this embodiment, the driving mechanism drives the screw nut to rotate, and the screw nut drives the screw 210 and the laser 100 to move in a translational manner along the width direction of the coating area 11. With this arrangement, the position adjustment step of the laser 100 is simple and convenient for the user to operate.
In another embodiment, not shown in fig. 1, the first moving assembly comprises a gear and a rack engaged with each other, the rack is fixedly connected to the laser 100 and extends along the width direction of the coating area 11, and the gear is connected to the driving mechanism.
In this embodiment, the driving mechanism drives the gear to rotate, the gear engages with the transmission rack to move in a translational manner along the width direction of the coating area 11, and the rack drives the laser 100 to move in a synchronous translational manner along the width direction of the coating area 11.
In another embodiment not shown in fig. 1, the first moving assembly includes a slide rail and a slide rail, the slide rail extends along the width direction of the coating area 11, and the slide rail is slidably disposed on the slide rail and fixedly connected to the laser 100.
In this embodiment, the driving mechanism drives the slider to move in a translational manner along the width direction of the coating region 11, and the slider drives the laser 100 to move in a synchronous translational manner along the width direction of the coating region 11.
In the above embodiment, the laser 100 is moved in translation only in the width direction of the coating film region 11. In other embodiments, laser 100 may be moved along the length of coated film segment 11 in addition to being moved in translation along the width of coated film segment 11. Alternatively, laser 100 is translated only along the width of coating zone 11 and pole piece 10 is moved along the length of coating zone 11.
In another embodiment not shown in fig. 1, the moving mechanism 200 further includes a second moving component, the second moving component is connected to the first moving component, and the second moving component drives the first moving component to move up and down.
In this embodiment, the laser 100 can move up and down in the coating area 11 in addition to moving in translation in the coating area 11, and the position adjustment of the laser 100 is more flexible and convenient.
It should be noted that the lifting motion means lifting in the vertical direction (i.e., the Z direction shown in fig. 1).
Particularly in one embodiment, the second moving assembly comprises a screw rod and a screw nut. The laser 100 is connected to a lead screw nut, the lead screw being arranged in a vertical direction, the lead screw nut being connected to a drive mechanism. In this embodiment, the feed screw nut is driven to rotate, and the feed screw nut drives the feed screw and the laser to move up and down.
In another embodiment, not shown in fig. 1, the second moving assembly comprises a gear and a rack engaged with each other, the rack is fixedly connected to the laser 100 and extends in the vertical direction, and the gear is connected with the driving mechanism. In this embodiment, the gear is driven to rotate, the gear engages with the transmission rack to move up and down, and the rack drives the laser 100 to move up and down.
In another embodiment not shown in fig. 1, the second moving assembly includes a slide rail and a slide rail, the slide rail extends along a vertical direction, and the slide rail is slidably disposed on the slide rail and fixedly connected to the laser 100. In this embodiment, the slider is driven to move up and down, and the slider drives the laser 100 to move up and down.
In a specific embodiment, the laser 100 is a high frequency short pulse or continuous laser 100. With this arrangement, the laser 100 has a large output power, which is advantageous for improving the thinning efficiency of the laser 101.
It can be understood that, as shown in fig. 2 and 1, the depth of the edge 12 of the coating film region 11 is h1, the depth of the thinning by the laser 100 is h2, and the depth of the thinned coating film region 11 is h1 to h 2. The skiving width W1 of the edge 12 can be adjusted by adjusting the spot size of the laser 101, and the skiving depth h2 of the edge 12 can be adjusted by adjusting the power of the laser 101.
Referring to fig. 1, an embodiment of a coating system for a pole piece 10 includes a pole piece 10 thinning apparatus and a coating apparatus.
In a specific embodiment, the slurry is applied to the pole piece 10 by a coating device to form a coating region 11, and the edge 12 of the coating region 11 is thinned by a thinning device of the pole piece 10. Accurate control of thinning precision of the film coating area 11 in real time is achieved, yield of the pole piece 10 is improved, labor cost and waste of raw materials are saved, and large-scale production is easy to popularize.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A pole piece skiving device, comprising:
a laser for emitting laser light;
the moving mechanism is connected with the laser; and
the driving mechanism is connected with the moving mechanism;
under the driving of the driving mechanism, the moving mechanism is controlled to drive the laser to move in a coating area of the pole piece until the laser thins the edge of the coating area.
2. The pole piece thinning apparatus of claim 1, further comprising a deviation sensor and a controller electrically connected to each other, wherein the deviation sensor is configured to detect a real-time position of the edge in the coating region and generate a corresponding position signal, and the controller is configured to receive the position signal and control the driving mechanism and the transmission mechanism, so as to control the laser to move along with the edge in the coating region, so that the laser always acts on the edge in the coating region.
3. The pole piece thinning apparatus of claim 2, wherein the coating region has a first edge and a second edge, the first edge and the second edge are located on different sides of the coating region, and the first edge and the second edge are respectively provided with at least one of the skew-correcting sensors.
4. The pole piece thinning apparatus according to claim 1, wherein the moving mechanism is driven by the driving mechanism to drive the laser to move in a translation manner in the coating region.
5. The pole piece thinning apparatus of claim 4, wherein the moving mechanism drives the laser to move in translation along the length direction and/or the width direction of the coating region.
6. The pole piece thinning apparatus as claimed in claim 5, wherein the moving mechanism comprises a first moving assembly connected to the driving mechanism, the laser is mounted on the first moving assembly, the driving mechanism drives the first moving assembly to move, and the first moving assembly drives the laser to move in a translational manner along the width direction of the coating region.
7. The pole piece thinning apparatus according to claim 6, wherein the first moving assembly comprises a screw rod, a screw nut and a fixing seat, the laser is mounted on the fixing seat, the screw rod is fixedly connected with the fixing seat, the screw nut is connected with the driving mechanism, the driving mechanism drives the screw nut to rotate, and the screw nut drives the screw rod and the laser to move in a translational manner along a width direction of the coating region.
8. The pole piece thinning apparatus of claim 6, wherein the moving mechanism further comprises a second moving assembly, the second moving assembly is connected to the first moving assembly, and the second moving assembly drives the first moving assembly to move up and down.
9. The pole piece thinning apparatus of claim 6, wherein the laser is a high frequency short pulse or continuous laser.
10. A pole piece coating system comprising a pole piece thinning apparatus according to any of claims 1 to 9.
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| CN117984598A (en) * | 2024-04-03 | 2024-05-07 | 耀能新能源(赣州)有限公司 | Overvoltage-preventing lithium battery pole piece rolling device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117984598A (en) * | 2024-04-03 | 2024-05-07 | 耀能新能源(赣州)有限公司 | Overvoltage-preventing lithium battery pole piece rolling device and method |
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