Pole piece supporting device

Abstract

The utility model relates to a pole piece supporting device. The pole piece supporting device comprises a supporting main body; the brush structure is arranged on the supporting main body; the top of the brush structure is provided with a supporting surface, and the brush structure supports the bottom of the pole piece through the supporting surface; wherein the supporting surface is an arc-shaped surface. According to the scheme provided by the invention, the pole piece can be supported and dedusted before being wound, the brush structure is used for dedusting the bottom of the pole piece and reducing foreign matters or other particles generated by friction, and the foreign matters or other particles at the bottom of the pole piece are brushed off; therefore, foreign matters or other particles carried by the pole piece before the pole piece enters the winding process are further reduced, the foreign matter problem in the cell production process is effectively improved, and the safety performance of a battery product is improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a pole piece supporting device. Background Art

[0002] During the manufacturing process of lithium-ion batteries, small foreign matter or other particles, such as metal particles, are easily generated. The above-mentioned foreign matter or other particles may come from the wear of the pole piece material, the slight shedding of equipment components, or the intervention of other external pollutants. In order to reduce the impact of foreign matter or other substances on the battery production process, brushing powder and magnetic rod demagnetization are generally used to reduce the foreign matter or other substances carried on the pole piece.

[0003] In related technologies, dust removal is generally performed when the electrode is cut. However, in the subsequent electrode processing process, especially after the cut electrode comes into friction contact with the roller during transportation, there may still be a risk of carrying foreign matter or other particles. After the electrode carrying foreign matter or other particles is directly wound to form a battery cell and applied to the battery, there is a risk of internal short circuit in the battery. In severe cases, it may cause the battery to overheat, catch fire or even explode, affecting the safety performance of the battery. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a pole piece support device that can provide support and dust removal for the pole piece before winding, effectively reducing foreign matter or other particles carried by the pole piece, thereby effectively improving the foreign matter problem of the battery cell during the production process and improving the safety performance of the battery product.

[0005] A first aspect of the present application provides a pole piece supporting device, comprising:

[0006] a supporting body; and

[0007] A brush structure is provided on the support body; the top of the brush structure has a support surface, and the brush structure provides support to the bottom of the pole piece through the support surface; wherein the support surface is an arc-shaped surface.

[0008] In some embodiments, the brush structure includes: multiple groups of brush bundles, and the multiple groups of brush bundles are arranged and distributed on the same surface of the support body.

[0009] In some embodiments, the brush bundle is made of anti-static plastic material.

[0010] In some embodiments, the support body includes: a mounting portion and a supporting portion;

[0011] The mounting portion is connected to the supporting portion; the cross section of the supporting portion is arc-shaped, and a plurality of groups of the brush bundles are arranged on the supporting portion.

[0012] In some embodiments, the multiple groups of brush bundles have the same length, so that the tops of the multiple groups of brush bundles form an arc-shaped supporting surface corresponding to the supporting portion.

[0013] In some embodiments, the support body further comprises: a dust suction structure provided on the support body;

[0014] The dust suction structure and the brush structure are located on the same surface of the supporting body; the dust suction structure is used to remove dust through negative pressure.

[0015] In some embodiments, the dust suction structure includes: a plurality of groups of negative pressure dust removal holes provided on the supporting body.

[0016] In some embodiments, a plurality of groups of the negative pressure dust removal holes are arranged and distributed on the same surface of the support body and the brush structure.

[0017] In some embodiments, the multiple groups of brush bundles and the multiple groups of negative pressure dust removal holes are alternately distributed.

[0018] In some embodiments, the dust suction structure further includes: a plurality of connecting holes corresponding to the plurality of groups of the negative pressure dust removal holes, and the negative pressure dust removal holes in the same group are all connected to the same connecting hole.

[0019] The technical solution provided by this application may have the following beneficial effects:

[0020] The technical solution of the present application can provide support to the cut electrode through the support surface formed on the top of the brush structure before the electrode enters the winding process, and use the elasticity of the brush material itself to provide buffering for the transportation support of the electrode, effectively preventing the hard force from causing damage to the electrode and reducing the particles caused by the hard force, and use the brush structure to remove dust from the bottom of the electrode and reduce foreign matter or other particles generated by friction, and brush off foreign matter or other particles at the bottom of the electrode, thereby further reducing foreign matter or other particles carried by the electrode before entering the winding process, thereby effectively improving the foreign matter problem in the battery cell production process; in addition, the support surface of the brush structure in the electrode support device of the present application is an arc-shaped surface, which can fit more closely to the bottom of the cut electrode, thereby improving the support effect and dust removal effect of the electrode support device of the present application on the electrode.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0023] Figure 1 Schematic diagram of the structure of the pole piece support device shown in the embodiment of the present application;

[0024] Figure 2 This is another structural schematic diagram of the pole piece support device shown in an embodiment of the present application.

[0025] Drawing numerals: 100, supporting body; 110, mounting portion; 120, supporting portion; 200, brush structure; 210, supporting surface; 220, brush bundle; 300, dust suction structure; 310, negative pressure dust removal hole; 320, connecting hole. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0027] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0028] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] In the related art, dust removal is generally performed when the electrode is cut. However, in the subsequent electrode processing process, especially after the cut electrode comes into friction with the roller during transportation, new foreign matter or other particles will still be generated, resulting in the risk of the cut electrode still carrying foreign matter or other particles. After the electrode carrying foreign matter or other particles is directly wound to form a battery cell and applied to the battery, there is a risk of causing an internal short circuit in the battery. In severe cases, it may cause the battery to overheat, catch fire or even explode, affecting the safety performance of the battery.

[0031] In response to the above problems, an embodiment of the present application provides a pole piece support device that can provide support and dust removal for the pole piece before winding, effectively reducing the particles carried by the pole piece, and thereby effectively improving the particle problem of the pole piece during the production process. After the pole piece is applied to the battery, it can reduce the short circuit risk of the battery product and improve the safety performance of the battery product.

[0032] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] Figure 1 Schematic diagram of the structure of the pole piece support device shown in the embodiment of the present application; Figure 2 This is another structural schematic diagram of the pole piece support device shown in an embodiment of the present application.

[0034] See also Figure 1 and Figure 2 The electrode support device of the present application is mainly used to support and remove dust from the electrode before winding, thereby reducing the foreign matter or other particles carried by the electrode during the process of cutting and transporting the electrode to the winding station due to contact between the electrode and the roller during transportation or other factors. It should be understood that the electrode support device of the present application can also be used in other processing steps besides pre-winding according to actual application requirements, and this is not limited here.

[0035] The electrode support device of the present application includes: a support body 100 and a brush structure 200. The brush structure 200 is arranged on the support body 100. The brush structure 200 can be arranged on the same surface of the support body 100, such as the side of the support body 100 facing upward when the electrode support device is in use. The brush structure 200 has a support surface 210 on the top, and the brush structure 200 provides support to the bottom of the electrode through the support surface 210. It can be understood that the electrode support device provides support to the electrode through the support surface 210 of the brush structure 200 during application, that is, the electrode does not contact the support body 100 with high hardness, but the electrode contacts the brush structure 200 with low hardness. When the electrode passes through the electrode support device of the present application and contacts the support surface 210 of the brush structure 200, the brush structure can brush off the particles at the bottom of the electrode, thereby reducing the particles carried by the electrode before entering the winding process.

[0036] Furthermore, the support surface 210 is an arc-shaped surface. It is understood that the support surface 210 may partially or entirely exhibit a certain curvature. The electrode sheet needs to be cut before entering the winding process, and the cut electrode sheet generally exhibits a certain curvature. The curved support surface 210 in the electrode sheet support device of the present application allows the brush structure 200 to more closely fit the bottom of the cut electrode sheet, further enhancing the support and dust removal effects on the electrode sheet.

[0037] In the related art, before the electrode enters the winding process, it is supported by a plane with higher hardness. When the electrode is transported to the plane, due to the difference in height, when the electrode falls directly onto the plane with higher hardness without buffering, the impact force will directly act on the electrode material. At this time, the hard contact may not only cause minor damage to the electrode itself, but may also generate additional particles, such as particles formed by detached objects from the surface of the electrode or wear products of the supporting plane.

[0038] The pole piece support device of the present application provides support to the cut pole piece through the support surface formed on the top of the brush structure before the pole piece enters the winding process, and uses the elasticity of the brush material itself to provide buffering for the transportation support of the pole piece, effectively preventing the hard force from causing damage to the pole piece and reducing the particles caused by the hard force. The brush structure is used to remove dust from the bottom of the pole piece and reduce foreign matter or other particles generated by friction, and the foreign matter or other particles at the bottom of the pole piece are brushed off, thereby further reducing the foreign matter or other particles carried by the pole piece before entering the winding process; in addition, the support surface of the brush structure in the pole piece support device of the present application is an arc-shaped surface, which can fit more closely to the bottom of the cut pole piece, thereby improving the support effect and dust removal effect of the pole piece support device of the present application on the pole piece.

[0039] In some embodiments, the brush structure 200 includes multiple groups of brush bundles 220. That is, the brush structure 200 can be composed of multiple groups of brush bundles 220. Among them, the multiple groups of brush bundles 220 are arranged and distributed on the same surface of the support body 100. It can be understood that by arranging the multiple groups of brush bundles 220 in an arranged manner on the surface facing upward of the support body 100. Through the above structure, the design cost can be reduced while ensuring the support effect of the brush structure 200 on the electrode. Furthermore, the multiple groups of brush bundles 220 can be arranged on the support body 100 in an equidistant manner, so that enough space is reserved between each group of brush bundles 220 to facilitate the falling of foreign matter or other particles at the bottom of the electrode.

[0040] In some embodiments, the brush bundle 220 is made of antistatic plastic. It is known that the brush bundle 220 can be composed of multiple individual bristles. For example, the bristle density of the brush bundle can be 40 to 45 bristles / mm. 2 , and the diameter of each bristle can be 0.07mm. The bristles that make up the brush bundle 220 can all be made of plastic material with anti-static properties. For example, the bristles that make up the brush bundle 220 can be made of nylon 66, that is, the brush bundle 220 is made of nylon 66. In this way, the brush bundle 220 can effectively reduce the generation of static electricity during long-term contact with the bottom of the electrode, thereby reducing the impact of static electricity on the dust removal effect of the electrode. At the same time, it can be known that the plastic material can effectively ensure the buffering effect provided by the brush structure 200 on the electrode, further reducing the probability of hard contact between the electrode and the brush structure 200, and thus reducing the generation of particles when the electrode support device of the present application provides support to the electrode. Furthermore, the bristle hardness of the brush bundle 220 can be 108HK~118HK, where HK is "Knoop Hardness". When the bristle hardness of the brush bundle 220 adopts the above-mentioned Knoop hardness range, it can effectively ensure the balance between the support effect and the buffering effect of the brush bundle 220.

[0041] In some embodiments, the support body 100 includes a mounting portion 110 and a support portion 120. The mounting portion 110 is used for mounting and fixing the electrode support device of the present application. The mounting portion 110 may be provided with a mounting hole, and the electrode support device may be mounted and fixed to a preset position through the mounting hole. The mounting portion 110 is connected to the support portion 120. The cross-section of the support portion 120 is arc-shaped, and a plurality of groups of brush bundles 220 are provided on the support portion 120. It can be understood that the support portion 120 presents an arc-shaped structure as a whole. For example, the support portion 120 presents an arc-shaped structure with a single side in the shape of a water drop as a whole. In other words, the surface of the support portion 120 may present an arc surface with a gradually decreasing curvature. The plurality of groups of brush bundles 220 are provided on the surface of the support portion 120, so that the plurality of groups of brush bundles 220 may present an arc distribution following the change in the curvature of the support portion 120. In some specific embodiments, the multiple groups of brush bundles 220 have the same length. It can be understood that when the multiple groups of brush bundles 220 are distributed on the support portion 120 in an arranged manner, as the curvature of the support portion 120 changes, the tops of the multiple groups of brush bundles 220 with the same length change with the curvature of the support portion 120, so that the tops of the multiple groups of brush bundles 220 form an arc-shaped support surface corresponding to the support portion 120.

[0042] In some embodiments, the support body 100 also includes a dust suction structure 300 provided on the support body 100. The dust suction structure 300 and the brush structure 200 are located on the same surface of the support body 100, and the dust suction structure 300 is used to remove dust through negative pressure. The dust suction structure 300 enables the electrode support device of the present application to have a negative pressure dust suction function, so that the brush structure 200 can remove foreign matter or other particles and dust brushed off from the electrode bottom plate, and use the dust suction structure 300 to remove dust by using negative pressure, thereby effectively preventing the brushed foreign matter or other particles and dust from re-adhering to the electrode currently passing through the electrode support device or the next electrode, preventing the above-mentioned foreign matter or other particles and dust from causing secondary pollution to the electrode, thereby improving the production quality of the product. In some specific embodiments, the dust suction structure 300 includes a plurality of groups of negative pressure dust removal holes 310 provided on the support body 100. It is understandable that the dust collection structure 300 can be composed of multiple groups of negative pressure dust removal holes 310, wherein the multiple groups of negative pressure dust removal holes 310 can be fully distributed in the area on the electrode support device of the present application that supports the electrode, so as to meet the dust collection requirements of the electrode support device of the present application. In some other specific embodiments, the multiple groups of negative pressure dust removal holes 310 are arranged and distributed on the same surface of the support body 100. It is understandable that the multiple groups of negative pressure dust removal holes 310 are arranged and distributed on the same surface of the support body 100 and the brush structure 200, so that the negative pressure dust removal holes 310 are more evenly distributed in the area corresponding to the brush structure 200, which can further ensure the dust collection effect of the dust collection structure 300.

[0043] In some embodiments, multiple groups of brush bundles 220 are alternately distributed with multiple groups of negative pressure dust removal holes 310. It is understood that a group of negative pressure dust removal holes 310 is provided between any two groups of brush bundles 220. Through the above structure, it can be effectively ensured that the particles and dust brushed off from the bottom of the electrode by the brush structure 200 can be effectively removed by the dust suction structure 300, further improving the dust removal effect of the electrode support device of the present application on the electrode. Furthermore, the wind speed of each negative pressure dust removal hole 310 can be greater than 6m / s, for example, the wind speed of each negative pressure dust removal hole 310 is 8m / s.

[0044] In some further embodiments, the dust suction structure 300 further includes a plurality of connecting holes 320 corresponding to the plurality of groups of negative pressure dust removal holes 310, wherein the same group of negative pressure dust removal holes 310 are all connected to the same connecting hole 320. The plurality of connecting holes 320 can be arranged on the same side of the support body 100. It can be understood that the groups of negative pressure dust removal holes 310 are not connected to each other, and each group of negative pressure dust removal holes 310 is connected to the external negative pressure source through an independent connecting hole 320. In this way, according to the actual application of dust suction requirements, the corresponding connecting holes 320 can be connected to activate the corresponding group of negative pressure dust removal holes 310, so that the pole piece support device of the present application can meet different dust suction requirements. Furthermore, the connecting hole 320 can be connected to the external negative pressure source in a threaded connection. Still further, the plurality of groups of negative pressure dust removal holes 310

[0045] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description are not necessarily required for this application. In addition, it is understood that the steps in the method of the embodiment of the present application can be adjusted in sequence, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0046] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A pole piece supporting device, characterized in that: include: Supporting body; as well as a brush structure, the brush structure being arranged on the supporting body; The top of the brush structure has a support surface, and the brush structure provides support to the bottom of the pole piece through the support surface; wherein the support surface is an arc-shaped surface.

2. The device according to claim 1, characterized in that The brush structure includes: multiple groups of brush bundles, and the multiple groups of brush bundles are arranged and distributed on the same surface of the supporting body.

3. The device according to claim 2, characterized in that The brush bundle is made of anti-static plastic material.

4. The device according to claim 2, characterized in that The supporting body includes: a mounting portion and a supporting portion; The mounting portion is connected to the supporting portion; the cross section of the supporting portion is arc-shaped, and a plurality of groups of the brush bundles are arranged on the supporting portion.

5. The device according to claim 4, characterized in that The multiple groups of brush bundles have the same length, so that the tops of the multiple groups of brush bundles form an arc-shaped supporting surface corresponding to the supporting portion.

6. The device according to any one of claims 2 to 5, characterized in that The support body further includes: a dust suction structure provided on the support body; The dust suction structure and the brush structure are located on the same surface of the supporting body; the dust suction structure is used to remove dust through negative pressure.

7. The device according to claim 6, characterized in that The dust collection structure includes: a plurality of groups of negative pressure dust removal holes arranged on the supporting body.

8. The device according to claim 7, characterized in that A plurality of groups of negative pressure dust removal holes are arranged and distributed on the same surface of the support body and the brush structure.

9. The device according to claim 7, characterized in that The multiple groups of brush bundles and the multiple groups of negative pressure dust removal holes are distributed alternately.

10. The device according to claim 7, characterized in that The dust suction structure further includes: a plurality of communication holes corresponding to the plurality of groups of negative pressure dust removal holes, and the negative pressure dust removal holes in the same group are all connected to the same communication hole.

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