Cutting device and pole piece winding apparatus

Abstract

The application discloses a cutting device and a pole piece winding equipment. The cutting device comprises a cutting mechanism, the cutting mechanism comprises a cutting knife assembly, and the cutting knife assembly is used for cutting a pole piece; a dust removal mechanism comprises a negative pressure assembly and a dust suction box connected with each other, and the dust suction box is connected to the cutting mechanism. The cutting device has a first direction, the dust suction box is provided with a first channel extending in the first direction, the dust suction box is provided with a dust suction port at a position corresponding to the cutting knife assembly, the dust suction port comprises a first hole and a second hole arranged in the first direction, the first hole and the second hole are communicated with the first channel, in a second direction, the maximum width of the first hole is greater than that of the second hole, and the second direction intersects with the first direction. The negative pressure assembly is communicated with one end of the first channel close to the second hole, and the negative pressure assembly is used for providing suction force to the dust suction port through the first channel to suck and remove dust around the cutting knife assembly. In this way, the dust removal uniformity of the dust removal mechanism can be improved.

Description

Technical Field

[0001] This application belongs to the field of battery manufacturing technology, specifically relating to a cutting device and an electrode winding device. Background Technology

[0002] With the gradual maturation of new energy technologies, lithium batteries, with their characteristics of light weight, large energy storage, high power, no pollution, long life, low self-discharge coefficient, and wide temperature range, have been widely used in various fields. In the lithium battery production process, the winding process is a key step in battery formation. The winding machine cuts the battery electrode sheets (including positive and negative electrode sheets) according to the cell process requirements and winds them together with the separator to form the cell.

[0003] In related technologies, a cutting device is installed in the winding machine to cut the electrode sheet, and a dust removal mechanism is installed to remove dust that falls from the cut edge of the electrode sheet. However, the cut edges of the electrode sheet are usually distributed in a long strip shape. When using the dust removal mechanism in related technologies, there is a problem of uneven dust removal effect at different cut edges of the corresponding electrode sheet. Summary of the Invention

[0004] This application aims to provide a cutting device and an electrode winding equipment, which at least solves one of the problems of uneven dust removal effect at different cutting positions of the corresponding electrode when using the dust removal mechanism in the related technology.

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

[0006] In a first aspect, embodiments of this application provide a cutting device, comprising:

[0007] A cutting mechanism, comprising a cutting blade assembly for cutting electrode sheets; and a dust removal mechanism, comprising a negative pressure assembly and a dust collection box connected to each other, the dust collection box being connected to the cutting mechanism.

[0008] The cutting device has intersecting first and second directions, the dust collection box is provided with a first channel extending along the first direction, and the dust collection box is provided with a dust collection port at a position corresponding to the cutting blade assembly;

[0009] The suction port includes a first hole and a second hole arranged along the first direction, both of which are connected to the first channel; along the second direction, the maximum width of the first hole is greater than the maximum width of the second hole; the negative pressure component is connected to the end of the first channel near the second hole along the first direction, and the negative pressure component is used to provide suction to the suction port through the first channel to remove dust around the cutting blade component.

[0010] Optionally, along the first direction, the second hole is disposed on both sides of the first hole, and the first channel has a first end and a second end disposed opposite to each other along the first direction;

[0011] The negative pressure component is directly connected to the first end and the second end;

[0012] Alternatively, the dust collection box may also be provided with a second channel, which is spaced apart from the first channel. One end of the second channel is connected to the second end, and the other end of both the first end and the second channel are connected to the negative pressure component.

[0013] Optionally, the dust collection box is further provided with a third channel, which is spaced apart from both the second channel and the first channel;

[0014] One end of the third channel is provided with an air guide, the third channel is connected to the first channel through the air guide, and the air guide corresponds to the first hole. The other end of the third channel is connected to the negative pressure component.

[0015] Optionally, the cross-sectional area of ​​the first hole perpendicular to the first direction is S1, and the cross-sectional area of ​​the second hole perpendicular to the first direction is S2, satisfying: S1 > S2.

[0016] Optionally, the cross-sectional area S1 of the first hole perpendicular to the first direction and the cross-sectional area S2 of the second hole perpendicular to the first direction also satisfy: 1.5≤S1 / S2≤2.0.

[0017] Optionally, from the first hole to the second hole, at least a portion of the suction port decreases in cross-sectional area perpendicular to the first direction.

[0018] Optionally, the cutting mechanism further includes a base and a drive mechanism, and the cutting blade assembly includes a first cutting blade and a second cutting blade;

[0019] The first cutter is fixedly connected to the base, the second cutter is movably connected to the base, the drive mechanism is disposed on the base and connected to the second cutter, and is used to drive the second cutter to move closer to or away from the first cutter in order to cut the electrode sheet located between the first cutter and the second cutter; the dust collection box is disposed close to the first cutter and / or the second cutter.

[0020] Optionally, the dust collection box includes a first dust collection box and a second dust collection box;

[0021] The first dust collection box is connected to the first cutter, and the suction port of the first dust collection box faces the cutting part of the first cutter, for removing dust around the first cutter; the second dust collection box is connected to the second cutter, and the suction port of the second dust collection box faces the cutting part of the second cutter, for removing dust around the second cutter.

[0022] Optionally, the cutting mechanism further includes: a connecting block and a guide rod;

[0023] The base has a guide hole, one end of the guide rod is movably connected to the guide hole, and the other end of the guide rod is connected to the connecting block. The second cutter is connected to the connecting block. The driving mechanism is connected to the connecting block and is used to drive the connecting block to move relative to the base, and to drive the second cutter to move closer to or away from the first cutter through the connecting block.

[0024] Optionally, the cutting mechanism further includes: a limiting member, which is disposed on both sides of the second cutting blade along the first direction, for limiting the second cutting blade.

[0025] Secondly, embodiments of this application provide an electrode winding apparatus, including the cutting device described in any of the above claims.

[0026] In the embodiments of this application, a dust removal mechanism is provided in the cutting mechanism near the cutting blade assembly. This dust removal mechanism includes a dust collection box and a negative pressure component. The negative pressure component provides suction to the dust collection box. A first channel extending in a first direction is provided inside the dust collection box. A dust collection port is provided at a position corresponding to the cutting blade assembly. The dust collection port includes a first hole and a second hole arranged in the first direction, both communicating with the first channel. The maximum width of the first hole is set to be greater than the maximum width of the second hole. The negative pressure component is connected to the side of the first channel near the second hole. Furthermore, by using the negative pressure component to provide suction within the first channel, and by setting the maximum width of the first hole to be greater than the maximum width of the second hole, the suction distribution at the corresponding positions of the first and second holes can be more uniform, thereby evenly removing dust around the cutting blade assembly and improving the dust removal effect.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of a cutting device according to an embodiment of this application;

[0030] Figure 2 This is one of the exploded views of the cutting apparatus according to an embodiment of this application;

[0031] Figure 3 This is a second exploded view of the cutting device according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the cutting device according to an embodiment of this application from another perspective;

[0033] Figure 5 This is a schematic diagram of the cutting device in an uncut state according to an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the cutting device in the cutting state according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of a dust removal mechanism according to an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of a dust collection box according to an embodiment of this application;

[0037] Figure 9 This is a cross-sectional view of a dust collection box along a first direction according to an embodiment of this application;

[0038] Figure 10 This is a cross-sectional view of another dust collection box according to an embodiment of this application along a first direction;

[0039] Figure 11 This is a cross-sectional view of another dust collection box according to an embodiment of this application, perpendicular to the first direction;

[0040] Figure 12 This is a schematic diagram of another dust removal mechanism according to an embodiment of this application;

[0041] Figure 13 This is a schematic diagram of another type of vacuum cleaner according to an embodiment of this application;

[0042] Figure 14 This is a cross-sectional view of another type of vacuum cleaner according to an embodiment of this application.

[0043] Figure label:

[0044] 100: Cutting mechanism; 110: Cutting blade assembly; 111: First cutting blade; 112: Second cutting blade; 120: Base; 130: Drive mechanism; 140: Connecting assembly; 141: Connecting block; 142: Guide rod; 150: Limiting component; 200: Dust removal mechanism; 210: Conduit; 220: Dust collection box; 220a: First dust collection box; 220b: Second dust collection box; 221: Dust collection port; 221a: First hole; 221b: Second hole; 222: First channel; 222a: First end; 222b: Second end; 223: Second channel; 224: Third channel; 224a: Air vent; 300: Electrode; X: First direction; Y: Second direction. Detailed Implementation

[0045] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0046] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] The cutting device and electrode winding equipment provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0050] like Figures 1 to 5 As shown, a cutting device according to some embodiments of this application includes: a cutting mechanism 100, which includes a cutting blade assembly 110 for cutting electrode sheets 300; a dust removal mechanism 200, including a negative pressure assembly (not shown) and a dust collection box 220 connected to each other, the dust collection box 220 being connected to the cutting mechanism 100; the cutting device has intersecting first direction X and second direction Y, the dust collection box 220 having a first channel 222 extending along the first direction X, and the dust collection box 220 having a suction port 221 at a position corresponding to the cutting blade assembly 110; as shown Figure 9 As shown, the suction port 221 includes a first hole 221a and a second hole 221b arranged along the first direction X. Both the first hole 221a and the second hole 221b are connected to the first channel 222. Along the second direction Y, the maximum width of the first hole 221a is greater than the maximum width of the second hole 221b. The negative pressure component is connected to the end of the first channel 222 near the second hole 221b along the first direction X. The negative pressure component is used to provide suction to the suction port 221 through the first channel 222 to remove dust around the cutter assembly 110.

[0051] In the embodiments of this application, a dust removal mechanism 200 is provided in the cutting mechanism 100 near the cutting blade assembly 110. The dust removal mechanism 200 includes a dust collection box 220 and a negative pressure assembly. The negative pressure assembly can provide suction to the dust collection box 220. A first channel 222 extending along the first direction X is provided in the dust collection box 220. The dust collection box 220 is provided with a dust suction port 221 at a position corresponding to the cutting blade assembly 110. The dust suction port 221 includes a first hole 221a and a second hole 221b arranged along the first direction X. Both the first hole 221a and the second hole 221b are connected to the first channel 222, and the negative pressure assembly is connected to the side of the first channel 222 near the second hole 221b. In this way, when the negative pressure component provides suction to the first hole 221a and the second hole 221b simultaneously through the first channel 222, the maximum width of the first hole 221a along the second direction Y is greater than the maximum width of the second hole 221b, which makes the flow distribution of the negative pressure airflow at the first hole 221a and the second hole 221b more uniform, thereby improving the uniformity of the dust collection effect at each position of the dust collection port 221.

[0052] Specifically, the cutting mechanism 100 includes a cutting blade assembly 110, which can cut the electrode sheet 300 to a preset size, and the dust removal mechanism 200 can remove the dust generated during the cutting process.

[0053] The dust removal mechanism 200 includes a dust collection box 220 and a negative pressure component. The dust collection box 220 is connected to the cutting mechanism 100, and a dust collection port 221 is provided on the dust collection box 220 at a position corresponding to the cutting blade assembly 110. The dust collection port 221 can face the cutting part of the cutting blade assembly 110. The cutting part of the cutting blade assembly 110 extends along the first direction X, and the dust collection port 221 is adapted to the cutting part of the cutting blade assembly 110.

[0054] Furthermore, the suction port 221 includes a first hole 221a and a second hole 221b arranged along the first direction X. Along the second direction Y, the maximum width of the first hole 221a is greater than the maximum width of the second hole 221b. A first channel 222 extending along the first direction X is provided in the dust collection box 220. Both the first hole 221a and the second hole 221b are connected to the first channel 222. A connection port is provided at one end of the first channel 222 near the second hole 221b. The negative pressure component is connected to the connection port of the first channel 222 through the conduit 210.

[0055] Wherein, the second direction Y intersects with the first direction X; preferably, the second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the air outlet direction of the dust suction port 221.

[0056] In specific applications, the negative pressure component can be used to provide negative pressure adsorption force to the first channel 222. Under the action of negative pressure adsorption force, a negative pressure airflow will be formed in the first channel 222. The negative pressure airflow flows through the first hole 221a and the second hole 221b respectively, so as to adsorb the dust around the cutting blade component 110 into the first channel 222.

[0057] Understandably, when the electrode sheet 300 is cut using the cutting assembly 110, the cutting positions of the electrode sheet 300 are elongated. To remove dust around the cutting positions of the electrode sheet 300, an elongated suction port 221 is provided on the dust collection box 220 in the dust collection mechanism 200 to match the cutting positions of the electrode sheet 300. In related technologies, the suction port 221 on the dust collection box 220 has a basically consistent size along its extension direction. When a negative pressure assembly is connected to the dust collection box 220, the negative pressure assembly provides negative pressure suction from one end of the suction port 221, thereby forming a negative pressure airflow within the suction port 221 to remove dust around the cutting positions.

[0058] However, in the related technology, the dust collection box 220 has a uniformly structured elongated opening for the suction port 221. When suction is applied from one end of the suction port 221, according to fluid dynamics principles, the flow distribution of negative pressure airflow at different locations within the suction port 221 is uneven along its extension direction. The flow rate is highest near the negative pressure component and lowest further away. This results in uneven distribution of adsorption force within the suction port 221, with weaker adsorption force further away from the negative pressure component, leading to poorer dust collection and a higher risk of missed dust.

[0059] The cutting device in this application, by setting the suction port 221 to include a first hole 221a and a second hole 221b distributed along the first direction X, and along the second direction Y, the maximum width of the first hole 221a is greater than the maximum width of the second hole 221b. In this way, when the negative pressure component provides suction from the end of the first channel 222 near the second hole 221b, it can reduce the flow loss of the negative pressure airflow when flowing through the first hole 221a, which helps to increase the flow of the negative pressure airflow at the second hole 221b, making the adsorption force distribution at various positions in the entire suction port 221 more uniform, thereby improving the dust removal effect of the dust removal mechanism 200.

[0060] For example, the maximum width of the first hole 221a in this application can be the diameter of the first hole 221a along the second direction Y, and the maximum width of the second hole 221b can be the diameter of the second hole 221b along the second direction Y. It should be noted that in the embodiments of this application, both the first hole 221a and the second hole 221b are straight holes, and the depths of the first hole 221a and the second hole 221b are the same. In some embodiments, the first hole 221a and the second hole 221b can also be tapered holes. In this case, the maximum width of the first hole 221a refers to the maximum width of the end of the first hole 221a facing the first channel 222, and the maximum width of the second hole 221b refers to the maximum width of the end of the second hole 221b facing the first channel 222. At the same time, the maximum width of the end of the first hole 221a away from the first channel 222 must also be greater than the maximum width of the end of the second hole 221b away from the first channel 222.

[0061] In some embodiments, the negative pressure component may include a vacuum cleaner, a vacuum compressor, a vacuum generator, or other devices capable of generating negative pressure adsorption. Of course, other negative pressure adsorption devices may also be selected. Those skilled in the art can select according to actual needs, and this application does not limit this.

[0062] In some embodiments, such as Figure 9 As shown, the first hole 221a and the second hole 221b are directly connected along the first direction X to form an elongated opening, which is the suction port 221, so that the suction port 221 can cover the cutting part of the cutter assembly 110 to improve the suction effect.

[0063] In some embodiments, the number of first holes 221a and second holes 221b can be multiple. Multiple first holes 221a and multiple second holes 221b are arranged at intervals along the first direction X to form a dust suction port 221. Multiple first holes 221a and multiple second holes 221b are connected through a first channel 222. Along the first direction X, multiple first holes 221a are relatively close to the negative pressure component, and multiple second holes 221b are relatively far away from the negative pressure component.

[0064] In some embodiments, one end of the first channel 222 along the first direction X is connected to the negative pressure component. The first hole 221a is located close to the negative pressure component, and the second hole 221b is located away from the negative pressure component. By setting the maximum width of the first hole 221a along the second direction Y to be greater than the maximum width of the second hole 221b along the second direction Y, when the negative pressure component provides negative pressure adsorption force, the adsorption force distribution at the corresponding positions of the first hole 221a and the second hole 221b can be made more uniform, thereby improving the adsorption effect of the entire dust suction port 221.

[0065] Optionally, such as Figure 10As shown, along the first direction X, the second hole 221b is disposed on both sides of the first hole 221a, and the first channel 222 has a first end 222a and a second end 222b disposed opposite to each other along the first direction X.

[0066] In some embodiments, the first channel 222 extends through both ends of the dust collection box 220 along the first direction X, and the negative pressure component is directly connected to the first end 222a and the second end 222b to provide negative pressure from both ends of the dust collection box 220 simultaneously, thereby improving the uniformity of adsorption.

[0067] In some other embodiments, the dust collection box 220 is also provided with a second channel 223, which is spaced apart from the first channel 222. One end of the second channel 223 is connected to the second end 222b, and the other end of the second channel 223 and the first end 222a are both connected to the negative pressure component. The other end of the second channel 223 and the first end 222a can be located on the same side or opposite side of the dust collection box 220 to adapt to the corresponding needs and make the installation more flexible.

[0068] In the embodiments of this application, the first channel 222 is connected to the negative pressure component at both ends along the first direction X, so that the negative pressure component can simultaneously provide suction to both ends of the first channel 222. Furthermore, second holes 221b are provided on both sides of the first hole 221a along the first direction X, meaning the suction port 221 has a structure that is larger in the middle and smaller at both ends. Thus, through the cooperation of the first channel 222 and the suction port 221, the uniformity of the adsorption force distribution at various positions along the first direction X of the suction port 221 can be further improved, thereby enhancing the dust removal effect of the dust removal mechanism 200.

[0069] Optionally, such as Figure 14 As shown, the dust collection box 220 is also provided with a third channel 224, which is spaced apart from the first channel 222 and the second channel 223. One end of the third channel 224 is provided with an air guide 224a, which is connected to the first channel 222 through the air guide 224a. The air guide 224a corresponds to the first hole 221a. The other end of the third channel 224 is connected to the negative pressure component.

[0070] In the embodiments of this application, a third channel 224 is provided inside the dust collection box 220, connecting the third channel 224 to the first channel 222, and the air guide 224a of the third channel 224 is oriented towards the first hole 221a. This allows both ends and the middle portion of the first channel 222 to be connected to the negative pressure component. In this way, the negative pressure component can simultaneously provide negative pressure adsorption force to different positions of the dust collection port 221, resulting in a more uniform distribution of adsorption force at each position of the dust collection port 221, thereby improving the dust removal effect of the dust removal mechanism 200.

[0071] Furthermore, the third channel 224 can be located between the first channel 222 and the second channel 223, or on one side of the first channel 222. The specific location is not limited, as long as the above effect can be achieved.

[0072] Optionally, such as Figure 9 and Figure 10 As shown, the cross-sectional area of ​​the first hole 221a along the first direction X is S1, and the cross-sectional area of ​​the second hole 221b along the first direction X is S2, satisfying: S1>S2.

[0073] In the embodiments of this application, by setting the cross-sectional area S1 of the first hole 221a perpendicular to the first direction X to be larger than the cross-sectional area S2 of the second hole 221b perpendicular to the first direction X, the structural size of the suction port 221 near the negative pressure component is larger than the structural size away from the negative pressure component. Thus, when the negative pressure component provides suction to the suction port 221, the flow distribution of the negative pressure airflow at various locations within the suction port 221 is more uniform, improving the uniformity of the adsorption force distribution at various locations within the suction port 221, and contributing to improved dust removal efficiency.

[0074] Optionally, such as Figure 9 and Figure 10 As shown, the cross-sectional area S1 of the first hole 221a along the first direction X and the cross-sectional area S2 of the second hole 221b along the first direction X also satisfy: 1.5≤S1 / S2≤2.0.

[0075] In the embodiments of this application, by setting the ratio of the cross-sectional area S1 of the first hole 221a along the first direction X to the cross-sectional area S2 of the second hole 221b along the first direction X, the structural size of the first hole 221a along the second direction Y is ensured to be larger than that of the second hole 221b along the second direction Y, thereby improving the uniformity of the adsorption force distribution at different positions within the suction port 221. Simultaneously, it avoids excessive differences between the structural sizes of the first hole 221a and the second hole 221b, which could affect the overall adsorption effect of the suction port 221.

[0076] It is understandable that when the negative pressure component provides adsorption force into the first channel 222, a negative pressure airflow is generated within the first channel 222. This negative pressure airflow, flowing through the suction port 221, can achieve dust removal around the cutting blade component 110. To improve the uniformity of the adsorption force distribution between the first hole 221a and the second hole 221b, the cross-sectional area S1 of the first hole 221a is set to be larger than the cross-sectional area S2 of the second hole 221b. However, if the difference between S1 and S2 is too large, it will also affect the flow rate of the negative pressure airflow at the second hole 221b, thus reducing the dust removal effect at the second hole 221b. Therefore, in this application, by setting the ratio of S1 / S2 within a reasonable range, the uniformity of the adsorption force at the first hole 221a and the second hole 221b is improved, while ensuring the dust removal effect at both holes 221a and 221b.

[0077] In some embodiments, the ratio S1 / S2 of the cross-sectional area S1 of the first hole 221a to the cross-sectional area S2 of the second hole 221b can be set to any value such as 1.5, 1.6, 1.7, 1.8, 1.9, 2.0 or any range between any two values.

[0078] It should be noted that the suction port 221 is located on the side wall of the first channel 222. The thickness of the side wall of the first channel 222 is usually uniform. That is, along the air outlet direction of the suction port 221, the depth of the first hole 221a is the same as the depth of the second hole 221b.

[0079] For example, both the first hole 221a and the second hole 221b are straight holes, and both have the same depth, H. Figure 9 and Figure 10 As shown, along the second direction Y, the length of the first hole 221a is L1, and the length of the second hole 221b is L2. Then, the ratio S1 / S2 of the cross-sectional area S1 of the first hole 221a to the cross-sectional area S2 of the second hole 221b is:

[0080] S1 / S2=(L1*H) / (L2*H)= L1 / L2 (1)

[0081] Based on the above formula (1), it can be seen that in specific applications, the ratio of S1 / S2 can be calculated by measuring the length L1 of the first hole 221a and the length L2 of the second hole 221b.

[0082] It is understood that when the cross-sectional shape of the suction port 221 along the direction perpendicular to the first direction X is other than the shape of the structure, the ratio S1 / S2 of the cross-sectional area S1 of the first hole 221a to the cross-sectional area S2 of the second hole 221b can be measured and calculated with reference to the aforementioned method, and those skilled in the art can make adaptive adjustments according to the actual structure.

[0083] In some embodiments, the dust removal effect of the dust removal mechanism 200 in the cutting device is compared and tested under different ratios of S1 / S2. The specific test contents are as follows:

[0084] The tested dust removal mechanism 200 includes, for example: Figure 10 The dust collection box 220 shown utilizes a negative pressure component to simultaneously provide negative pressure suction to the first channel 222 and the second channel 223, maintaining the airflow velocity in both channels 222 and 223 at approximately 20 m / s. Figure 10 As shown, a test point is selected at the outlet of the second hole 221b on the left and designated as test point 1, a test point is selected at the outlet of the first hole 221a and designated as test point 2, and a test point is selected at the outlet of the second hole 221b on the right and designated as test point 3. The wind speed at test points 1, 2 and 3 is tested respectively.

[0085] Specifically, according to the above formula (1), when the depths of the first hole 221a and the second hole 221b are the same, the ratio of S1 / S2 is equal to the ratio of L1 / L2. Therefore, in the specific testing process, the length L2 of the second hole 221b can be set to a fixed value, for example, L2 can be set to 1.5mm, and the length L1 of the first hole 221a can be set according to the preset ratio of S1 / S2, so that different structures of suction ports 221 can be obtained. The wind speed of suction ports 221 with different structures at 3 test points is tested respectively, and the test results are shown in Table 1:

[0086] Table 1

[0087]

[0088] Based on the test results in Table 1, it can be seen that in the cutting device of this application, by setting the ratio S1 / S2 between the cross-sectional area S1 of the first hole 221a and the cross-sectional area S2 of the second hole 221b within the range of [1.5, 2.0], the wind speed difference between the first hole 221a and the second hole 221b at the outlet is small, thus making the dust removal effect of the suction port 221 relatively uniform at different positions. However, when S1 / S2 is less than 1.5 or greater than 2.0, the wind speed difference between the first hole 221a and the second hole 221b at the outlet is large, and the dust removal effect of the suction port 221 at different positions is uneven. Therefore, by setting a reasonable range for S1 / S2, this application can improve the uniformity of dust suction at different positions of the suction port 221 and improve the dust removal effect.

[0089] Furthermore, as can be seen from Table 1, by simultaneously providing negative pressure from both ends of the first channel 222 along the first direction X, the wind speed at the air outlet of the first hole 221a on the left is close to the wind speed at the air outlet of the first hole 221a on the right. In other words, by simultaneously providing negative pressure from both ends of the suction port 221, it helps to improve the uniformity of the adsorption force at different positions of the suction port 221, thereby improving the dust removal effect of the dust removal mechanism 200.

[0090] Optionally, at least a portion of the suction port 221 decreases in cross-sectional area perpendicular to the first direction X from the first hole 221a to the second hole 221b.

[0091] In the embodiments of this application, by setting the cross-sectional area of ​​the suction port 221 to decrease from the first hole 221a to the second hole 221b, that is, the suction port 221 has a structure with a gradually changing size along the first direction X, when the negative pressure component provides negative pressure suction from the end of the first channel 222 near the second hole 221b, the adsorption force at each position in the first direction X of the suction port 221 is relatively evenly distributed, thereby helping to improve the overall dust removal effect of the dust removal mechanism 200.

[0092] In some embodiments, the cross-sectional shape of the suction port 221 along the direction perpendicular to the first direction can be circular, elliptical, spindle-shaped, rhomboid, etc. Of course, the suction port 221 can also be configured with other shapes and structures, which are not limited in this embodiment.

[0093] Optionally, such as Figures 1 to 3 As shown, the cutting mechanism 100 further includes a base 120 and a drive mechanism 130. The cutting blade assembly 110 includes a first cutting blade 111 and a second cutting blade 112. The first cutting blade 111 is fixedly connected to the base 120, and the second cutting blade 112 is movably connected to the base 120. The drive mechanism 130 is disposed on the base 120 and connected to the second cutting blade 112, and is used to drive the second cutting blade 112 to move closer to or away from the first cutting blade 111 in order to cut the electrode sheet 300 located between the first cutting blade 111 and the second cutting blade 112. The dust collection box 220 is disposed close to the first cutting blade 111 and / or the second cutting blade 112.

[0094] In the embodiments of this application, the cutting mechanism 100 is provided with a first cutting blade 111 and a second cutting blade 112. The second cutting blade 112 is driven to move closer to or away from the first cutting blade 111 by a driving mechanism 130. When the first cutting blade 111 and the second cutting blade 112 approach each other, the shearing force between the first cutting blade 111 and the second cutting blade 112 can be used to cut the electrode sheet 300. A dust collection box 220 is provided near the first cutting blade 111 and / or the second cutting blade 112 to remove dust generated during the cutting process of the electrode sheet 300, achieving a dust removal effect during the cutting process.

[0095] Specifically, the first cutter 111 is fixedly connected to the base 120, and the second cutter 112 is movably connected to the base 120, allowing the second cutter 112 to move relative to the first cutter 111. In use, the electrode 300 is placed between the first cutter 111 and the second cutter 112, and the second cutter 112 is driven closer to the first cutter 111 by the drive mechanism 130 to cut the electrode 300.

[0096] A dust collection box 220 can be set separately near the first cutter 111 or near the second cutter 112. The dust collection port 221 in the dust collection box 220 is set opposite to the cutting part of the first cutter 111 or the second cutter 112. During the cutting process, dust will be generated at the cut position of the electrode 300. The negative pressure airflow at the dust collection port 221 can bring the dust into the dust collection box 220.

[0097] Of course, dust collection boxes 220 can also be set near the first cutter 111 and near the second cutter 112, so that when the electrode sheet 300 is cut by the first cutter 111 and the second cutter 112, dust can be removed from both sides of the electrode sheet 300 at the same time, thereby improving the dust removal effect during the cutting process of the electrode sheet 300.

[0098] The dust suction port 221 in the dust collection box 220 can extend in the same direction as the first cutter 111 and / or the second cutter 112, and the dust suction port 221 can cover the cutting part of the first cutter 111 and / or the cutting part of the second cutter 112.

[0099] In some embodiments, the drive mechanism 130 may be selected from motor drive mechanism, cylinder drive mechanism, hydraulic drive mechanism, etc., and those skilled in the art can select according to actual needs. This application does not impose any restrictions here.

[0100] Optionally, such as Figure 2 The dust collection box 220 includes a first dust collection box 220a and a second dust collection box 220b. The first dust collection box 220a is connected to the first cutter 111, and the suction port 221 of the first dust collection box 220a faces the cutting part of the first cutter 111 for suctioning dust around the first cutter 111. The second dust collection box 220b is connected to the second cutter 112, and the suction port 221 of the second dust collection box 220b faces the cutting part of the second cutter 112 for suctioning dust around the second cutter 112.

[0101] In the embodiments of this application, by setting a first dust collection box 220a near the first cutter 111 and a second dust collection box 220b near the second cutter 112, dust can be removed from both sides of the electrode 300 simultaneously when the first cutter 111 and the second cutter 112 cut the electrode 300, which helps to improve the dust removal effect.

[0102] The first dust collection box 220a and the second dust collection box 220b can both include the dust collection box 220 structure in any of the above embodiments. The specific structure of the first dust collection box 220a and the second dust collection box 220b can be found in the foregoing content. The embodiments of this application are not limited here.

[0103] It should be noted that the structures of the first dust collection box 220a and the second dust collection box 220b can be the same or different. Those skilled in the art can make the settings according to actual needs, and this application does not impose any restrictions on this.

[0104] Optionally, such as Figure 2 and Figure 3 As shown, the cutting mechanism 100 further includes: a connecting block 141 and a guide rod 142; a guide hole (not shown in the figure) is provided in the base 120, one end of the guide rod 142 is movably connected in the guide hole, and the other end of the guide rod 142 is connected to the connecting block 141, and the second cutter 112 is connected to the connecting block 141; the driving mechanism 130 is connected to the connecting block 141 and is used to drive the connecting block 141 to move relative to the base 120, and to drive the second cutter 112 to move closer to or away from the first cutter 111 through the connecting block 141.

[0105] In the embodiments of this application, a guide hole is provided in the base 120, and the connecting block 141 is movably connected to the guide hole via a guide rod 142. The second cutter 112 is connected to the connecting block 141. The driving mechanism 130 can drive the connecting block 141 to move relative to the base 120, thereby causing the second cutter 112 to move closer to or away from the first cutter 111 for cutting the electrode sheet 300. Through the cooperation between the guide rod 142 and the guide hole, the movement of the second cutter 112 can be guided, which can improve the cooperation accuracy between the second cutter 112 and the first cutter 111 and improve the cutting effect.

[0106] In some embodiments, the base 120 may be provided with multiple guide holes, and the number of guide rods 142 may be set to multiple. Each guide rod 142 is movably connected to each guide hole. The connecting block 141 is connected to the multiple guide rods 142. Thus, through the cooperation of the multiple guide rods 142 and the multiple guide holes, the movement of the second cutter 112 can be guided, and the stability during the movement can be improved.

[0107] Optionally, such as Figure 4 As shown, the cutting mechanism 100 also includes a limiting member 150, which is disposed on both sides of the second cutting blade 112 along the first direction X, and is used to limit the second cutting blade 112.

[0108] In the embodiments of this application, limiting members 150 are respectively provided on both sides of the second cutter 112 so that when the second cutter 112 moves, the limiting members 150 can limit the movement of the second cutter 112, prevent the second cutter 112 from deviating, thereby improving the matching accuracy between the second cutter 112 and the first cutter 111 and improving the cutting effect.

[0109] Specifically, the limiting member 150 can be connected to the base 120, and the two ends of the second cutter 112 along the first direction X are respectively slidably connected to the corresponding limiting member 150. The second cutter 112 can slide relative to the limiting member 150, and the limiting member 150 can clamp and limit the second cutter 112 from both sides.

[0110] The limiting member 150 may have a groove on the side near the second cutter 112. The two ends of the second cutter 112 are respectively embedded in the corresponding grooves. The second cutter 112 can slide along the grooves, and thus the limiting member 150 plays a limiting role in the sliding trajectory of the second cutter 112.

[0111] Optionally, embodiments of this application also provide an electrode winding device, which includes the cutting device described in the above embodiments.

[0112] In the embodiments of this application, a dust removal mechanism 200 is provided in the cutting mechanism 100 near the cutting blade assembly 110. The dust removal mechanism 200 includes a dust collection box 220 and a negative pressure assembly. The negative pressure assembly can provide suction to the dust collection box 220. A first channel 222 extending along the first direction X is provided in the dust collection box 220. The dust collection box 220 is provided with a dust suction port 221 at a position corresponding to the cutting blade assembly 110. The dust suction port 221 includes a first hole 221a and a second hole 221b arranged along the first direction X. Both the first hole 221a and the second hole 221b are connected to the first channel 222. The negative pressure assembly is connected to the side of the first channel 222 near the second hole 221b. In this way, when the negative pressure component provides suction to the first hole 221a and the second hole 221b simultaneously through the first channel 222, the maximum width of the first hole 221a along the second direction Y is greater than the maximum width of the second hole 221b, which makes the flow distribution of the negative pressure airflow at the first hole 221a and the second hole 221b more uniform, thereby improving the uniformity of the dust collection effect at each position of the dust collection port 221.

[0113] It should be noted that the cutting device in the electrode winding equipment may include the cutting device in any of the above embodiments. The specific structure of the cutting device can be found in the foregoing content, and will not be repeated here in the embodiments of this application.

[0114] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0115] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cutting apparatus characterized by comprising: The application relates to a cutting device, comprising: a cutting mechanism (100) comprising a cutter assembly (110); a dust removal mechanism (200) comprising a negative pressure assembly and a dust suction box (220) connected to the cutting mechanism (100); the cutting device has intersecting first and second directions (X and Y), the dust suction box (220) is provided with a first channel (222) extending along the first direction (X), and the dust suction box (220) is provided with a dust suction port (221) at a position corresponding to the cutter assembly (110); the dust suction port (221) comprises first and second holes (221a and 221b) arranged along the first direction (X), the first and second holes (221a and 221b) are both in communication with the first channel (222), in the second direction (Y), the maximum width of the first hole (221a) is greater than that of the second hole (221b), the negative pressure assembly is in communication with the first channel (222) at an end of the first channel (222) close to the second hole (221b) along the first direction (X), and the negative pressure assembly is used for providing suction to the dust suction port (221) through the first channel (222) to remove dust around the cutter assembly (110); along the first direction (X), the second hole (221b) is arranged on the two sides of the first hole (221a), and the first channel (222) has first and second ends (222a and 222b) arranged oppositely along the first direction (X); along the direction from the first hole (221a) to the second hole (221b), at least part of the dust suction port (221) has a cross-sectional area decreasing perpendicularly to the first direction (X); the negative pressure assembly is directly connected to the first and second ends (222a and 222b); the dust suction box (220) is further provided with a second channel (223), the second channel (223) is arranged in a spaced manner with the first channel (222), one end of the second channel (223) is in communication with the second end (222b), and the first end (222a) and the other end of the second channel (223) are both in communication with the negative pressure assembly; the dust suction box (220) is further provided with a third channel (224), the third channel (224) is arranged in a spaced manner with the second channel (223) and the first channel (222); one end of the third channel (224) is provided with an air guide port (224a), the third channel (224) is in communication with the first channel (222) through the air guide port (224a), the air guide port (224a) corresponds to the first hole (221a), and the other end of the third channel (224) is in communication with the negative pressure assembly.

2. The cutting apparatus of claim 1, wherein the cross-sectional area of the first hole (221a) perpendicularly to the first direction (X) is S1, the cross-sectional area of the second hole (221b) perpendicularly to the first direction (X) is S2, and S1>S2 is met.

3. The cutting apparatus of claim 2, wherein, The cross-sectional area S1 of the first hole (221a) along a direction perpendicular to the first direction (X) and the cross-sectional area S2 of the second hole (221b) along a direction perpendicular to the first direction (X) also satisfy 1.5 ≤ S1 / S2 ≤ 2.

0.

4. The cutting apparatus of claim 1, wherein The cutting mechanism (100) further comprises a base (120) and a driving mechanism (130), and the cutting knife assembly (110) comprises a first cutting knife (111) and a second cutting knife (112); The first cutting knife (111) is fixedly connected to the base (120), the second cutting knife (112) is movably connected to the base (120), the driving mechanism (130) is arranged on the base (120) and connected to the second cutting knife (112), and is used for driving the second cutting knife (112) to move close to or away from the first cutting knife (111); and the dust collection box (220) is arranged close to the first cutting knife (111) and / or the second cutting knife (112).

5. The cutting apparatus of claim 4, wherein, The dust collection box (220) comprises a first dust collection box (220a) and a second dust collection box (220b). The first dust collection box (220a) is connected to the first cutting knife (111), a dust suction port (221) of the first dust collection box (220a) faces a cutting part of the first cutting knife (111), and is used for sucking dust around the first cutting knife (111); and the second dust collection box (220b) is connected to the second cutting knife (112), a dust suction port (221) of the second dust collection box (220b) faces a cutting part of the second cutting knife (112), and is used for sucking dust around the second cutting knife (112).

6. The cutting apparatus of claim 4, wherein, The cutting mechanism (100) further comprises a connecting block (141) and a guide rod (142). A guide hole is arranged in the base (120), one end of the guide rod (142) is movably connected to the guide hole, the other end of the guide rod (142) is connected to the connecting block (141), and the second cutting knife (112) is connected to the connecting block (141); the driving mechanism (130) is connected to the connecting block (141), and is used for driving the connecting block (141) to move relative to the base (120), and driving the second cutting knife (112) to move close to or away from the first cutting knife (111) through the connecting block (141).

7. The cutting apparatus of claim 4, wherein, The cutting mechanism (100) further comprises a limiting piece (150), which is arranged on both sides of the second cutting knife (112) along the first direction (X), and is used for limiting the second cutting knife (112).

8. An electrode sheet winding apparatus characterized by comprising: The cutting device comprises: The cutting device according to any one of claims 1-7.

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