Wrinkle removing roller and wrinkle removing device for removing wrinkles of battery pole piece, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a wrinkle removing roller and a wrinkle removing device for removing wrinkles of a battery pole piece, a battery and electric equipment. The wrinkle removing roller comprises a roller body, the first matching part and the second matching part are arranged on the surface of the roller body, and the acting force of the first matching part on the battery pole piece when the roller body rotates is opposite to the acting force of the second matching part on the battery pole piece when the roller body rotates. By the adoption of the wrinkle removing roller, wrinkles of the pole piece can be efficiently eliminated, meanwhile, belt breakage of the pole piece is avoided, the product yield is ensured, the production cost is greatly reduced, and reliability is high.

Description

Technical Field

[0001] The present application generally relates to the field of battery technology, and specifically relates to a wrinkle removal roller and wrinkle removal device, a battery, and an electrical device for removing wrinkles from a battery electrode. Background Art

[0002] With the continuous development of battery technology and the continuous improvement of product process requirements, the compaction density of the corresponding batches of products is getting larger and larger. At this time, the wrinkling phenomenon of battery electrodes is becoming more and more serious, which also increases the frequency of equipment belt breakage and the length of downtime for belt connection and maintenance, reducing the equipment utilization rate.

[0003] At present, the relevant technology alleviates wrinkling by increasing the tension of the pole piece, but the increase in tension will increase the frequency of pole piece breakage, affecting manufacturing efficiency, while wasting material resources and increasing production costs. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the related art, it is desired to provide a wrinkle removal roller and wrinkle removal device, battery, and electrical equipment for wrinkle removal of battery pole pieces, which can effectively eliminate the wrinkle phenomenon of pole pieces, ensure product yield, and reduce production costs.

[0005] In a first aspect, the present application provides a wrinkle removal roller for removing wrinkles from a battery electrode sheet, the wrinkle removal roller comprising:

[0006] Roller body;

[0007] A first matching portion and a second matching portion are arranged on the surface of the roller body, and the force exerted by the first matching portion on the battery pole piece when the roller body rotates is opposite to the force exerted by the second matching portion on the battery pole piece when the roller body rotates.

[0008] Optionally, in some embodiments of the present application, the first mating portion and the second mating portion both include a spiral groove engraved on the surface of the roller body, and the spiral directions of the spiral grooves in the two mating portions are opposite.

[0009] Optionally, in some embodiments of the present application, the spiral groove includes any one of a circular groove and a square groove.

[0010] Optionally, in some embodiments of the present application, along a direction parallel to the axis of the roller body, a horizontal inclination angle θ of the spiral groove satisfies 0<θ≤60°;

[0011] And / or, the depth H of the spiral groove satisfies 0<H≤30mm;

[0012] And / or, the center distance L1 of adjacent grooves in each of the spiral grooves satisfies 0<L1≤100mm, and the counter-rotation center distance L2 between the spiral grooves satisfies 0<L2≤50mm.

[0013] Optionally, in some embodiments of the present application, both the first mating portion and the second mating portion include a spiral protrusion adhered to the surface of the roller body, and the spiral directions of the spiral protrusions in the two mating portions are opposite.

[0014] Optionally, in some embodiments of the present application, the first matching portion and the second matching portion are symmetrically distributed along the axis of the roller body.

[0015] In a second aspect, the present application provides a wrinkle removal device, comprising a support frame, at least one pressure roller arranged between the support frames, and a wrinkle removal roller described in any one of the first aspects cooperating with the pressure roller.

[0016] Optionally, in some embodiments of the present application, sliding mechanisms capable of adjusting the vertical height h between the axis of the pressure roller and the axis of the wrinkle removal roller are respectively provided at both ends of the pressure roller.

[0017] Optionally, in some embodiments of the present application, the vertical height h satisfies 0≤h≤80mm.

[0018] Optionally, in some embodiments of the present application, the wrinkle removal device also includes an edge detector arranged at the belt feed end and a correction mechanism arranged at the bottom of the support frame, the edge detector can locate the center position of the battery electrode, and when the deviation value corresponding to the center position reaches a preset threshold, drive the correction mechanism to perform compensatory movement.

[0019] Optionally, in some embodiments of the present application, the correction mechanism includes a base plate, a slide rail arranged on the base plate, and a motor module. The motor module is connected to the bottom of the support frame and can drive the support frame to slide along the slide rail under the drive of the edge detector.

[0020] In a third aspect, the present application provides a battery, wherein the electrode of the battery is wrinkle-removed by the wrinkle-removing device described in any one of the second aspects.

[0021] In a fourth aspect, the present application provides an electrical device, wherein the electrical device comprises the battery described in the third aspect.

[0022] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0023] The embodiments of the present application provide a wrinkle removal roller and wrinkle removal device, battery, and electrical equipment for wrinkle removal of battery pole pieces. The wrinkle removal roller is provided with a first mating portion and a second mating portion on the surface of the roller body. When the roller body rotates, the force exerted by the first mating portion on the battery pole piece is opposite to the force exerted by the second mating portion on the battery pole piece, that is, it is equivalent to applying a low-intensity outward stretching force on the left and right sides of the large surface direction of the battery pole piece, thereby effectively eliminating wrinkles on the pole piece and avoiding pole piece breakage, thereby ensuring product yield, greatly reducing production costs, and having strong reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 A schematic diagram of the structure of a wrinkle removal roller provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the shape of a spiral groove provided in an embodiment of the present application, wherein Figure 2 (a) shows the schematic diagram of the circular groove. Figure 2 (b) shows the schematic diagram of the square groove;

[0027] Figure 3 An example of a wrinkle removal roller provided in an embodiment of the present application;

[0028] Figure 4 An example of another wrinkle removal roller provided in an embodiment of the present application;

[0029] Figure 5 Another example of a wrinkle removal roller provided in an embodiment of the present application;

[0030] Figure 6 Another example of a wrinkle removal roller provided in an embodiment of the present application;

[0031] Figure 7 A schematic diagram of the structure of a wrinkle removal device provided in an embodiment of the present application;

[0032] Figure 8 A schematic diagram of a belt threading device for a wrinkle removal device provided in an embodiment of the present application;

[0033] Fig. 9 A schematic diagram of a belt threading device for another wrinkle removal device provided in an embodiment of the present application;

[0034] Fig.10 A schematic diagram of a belt threading device for another wrinkle removal device provided in an embodiment of the present application;

[0035] Fig.11A schematic diagram of the structure of a pressure roller provided in an embodiment of the present application;

[0036] Fig.12 A schematic diagram of the positional relationship between the axis of a pressing roller and the axis of a wrinkle removal roller provided in an embodiment of the present application;

[0037] Fig.13 A schematic diagram of the structure of an edge detector provided in an embodiment of the present application;

[0038] Fig.14 A schematic diagram of the structure of a correction mechanism provided in an embodiment of the present application;

[0039] Fig.15 A structural block diagram of an electrical device provided in an embodiment of the present application.

[0040] Reference numerals:

[0041] 1-wrinkle removal roller, 11-roller body, 12-first matching part, 13-second matching part, 121, 131-spiral grooves, 2-wrinkle removal device, 21-support frame, 22-pressure roller, 23-edge detector, 24-correction mechanism, 241-bottom plate, 242-slide rail, 243-motor module, 3-battery, 4-electrical equipment. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0043] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described can be implemented in an order other than those illustrated or described herein.

[0044] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0045] For ease of understanding and explanation, the following Figures 1 to 15 The wrinkle removal roller and wrinkle removal device, battery, and electrical equipment for wrinkle removal of battery pole pieces provided in the embodiments of the present application are described in detail.

[0046] Please refer to Figure 1 , which is a schematic diagram of the structure of a wrinkle removal roller provided in an embodiment of the present application. The wrinkle removal roller 1 includes a roller body 11 and a first matching portion 12 and a second matching portion 13 arranged on the surface of the roller body 11, wherein the force exerted by the first matching portion 12 on the battery pole piece when the roller body 11 rotates is opposite to the force exerted by the second matching portion 13 on the battery pole piece when the roller body 11 rotates. For example, the force can be a lateral force. The advantage of such a setting is that it is equivalent to applying a low-intensity force that stretches outward on the left and right sides of the large surface direction of the battery pole piece, respectively, thereby being able to effectively eliminate wrinkles on the pole piece, while avoiding pole piece breakage, ensuring product yield and reducing production costs. Optionally, in the embodiment of the present application, the first matching portion 12 and the second matching portion 13 are symmetrically distributed along the axis l of the roller body 11. The advantage of such a setting is that the force on the battery pole piece is more uniform and the wrinkle removal effect is better.

[0047] For example, the specific structures of the first matching portion 12 and the second matching portion 13 in the embodiment of the present application may include but are not limited to the following two types, namely ① the first matching portion 12 and the second matching portion 13 both include a spiral groove ( Figure 1 ② The first matching part 12 and the second matching part 13 both include a spiral protrusion (not shown in the figure) pasted on the surface of the roller body 11, and the spiral directions of the spiral protrusions in the two matching parts are opposite, that is, the first matching part 12 includes a spiral groove 121, and the second matching part 13 includes a spiral groove 131. The advantage of this arrangement is that the carved spiral groove is stable and reliable in structure during use, will not slip, and is more precise; ② The first matching part 12 and the second matching part 13 both include a spiral protrusion (not shown in the figure) pasted on the surface of the roller body 11, and the spiral directions of the spiral protrusions in the two matching parts are opposite, that is, the working principle of structure ② is the same as that of structure ①, the difference is that structure ① is manufactured by engraving technology, and structure ② is manufactured by pasting technology. For example, the surface of the roller body 11 is smooth, and the spiral protrusion can be a rubber strip obliquely pasted on the surface of the roller body 11, and the two rubber strips are in a V shape. The advantage of this arrangement is that the manufacturing process is simple and the production cost can be reduced. It can be understood that the first matching part 12 and the second matching part 13 can also include a spiral groove pasted on the surface of the roller body 11, and the spiral protrusion and the spiral groove are located on the same layer.

[0048] Further, taking the example that both the first matching portion 12 and the second matching portion 13 include spiral grooves engraved on the surface of the roller body 11, the spiral grooves 121 and 131 may include circular grooves ( Figure 2 (a)) and square grooves ( Figure 2 (b)). For example Figure 3As shown, the spiral groove 121 of the first matching portion 12 and the spiral groove 131 of the second matching portion 13 are symmetrically distributed along the center O of the axis l of the roller body 11, and the spiral groove 121 and the spiral groove 131 are connected at the center O, wherein the spiral groove 121 and the spiral groove 131 are both circular grooves. Figure 4 As shown, the spiral groove 121 of the first matching portion 12 and the spiral groove 131 of the second matching portion 13 are symmetrically distributed along the center O of the axis l of the roller body 11, but the spiral groove 121 and the spiral groove 131 are disconnected at the center O, wherein the spiral groove 121 and the spiral groove 131 are both circular grooves. Figure 3 and Figure 4 It can be seen Figure 4 The density of spiral grooves is less than Figure 3 The density of the spiral grooves in Figure 5 As shown, the spiral groove 121 of the first matching portion 12 and the spiral groove 131 of the second matching portion 13 are symmetrically distributed along the center O of the axis l of the roller body 11. The spiral groove 121 and the spiral groove 131 are also circular grooves. The density of the spiral grooves in the figure is less than Figure 4 The density of spiral grooves in Figure 6 As shown, the spiral groove 121 of the first matching portion 12 and the spiral groove 131 of the second matching portion 13 are symmetrically distributed along the center O of the axis l of the roller body 11, but the spiral groove 121 and the spiral groove 131 are both square grooves. It should be noted that the shapes of the spiral grooves 121 and 131 can be any other shape besides circular and square, and this embodiment of the application is not limited to this.

[0049] Furthermore, the specific parameters of the spiral grooves 121 and 131 can be designed according to the actual thickness, width, friction coefficient and compaction density of the pole piece. Figure 1 Taking the wrinkle removal roller 1 shown as an example, the specific parameters of the spiral grooves 121 and 131 include but are not limited to at least one of the following: for example, along the direction parallel to the axis l of the roller body 11, the horizontal inclination angle θ of the spiral grooves 121 and 131 satisfies 0<θ≤60°, preferably 30°≤θ≤60°; for another example, the depth H of the spiral grooves 121 and 131 satisfies 0<H≤30mm; for another example, the center distance L1 of adjacent grooves in each of the spiral grooves 121 and 131 satisfies 0<L1≤100mm, and the anti-rotation center distance L2 between the spiral grooves 121 and 131 satisfies 0<L2≤50mm, which has a wide range of applications.

[0050] The wrinkle-removing roller for removing wrinkles from battery pole pieces provided in an embodiment of the present application has a first mating portion and a second mating portion arranged on the surface of the roller body. When the roller body rotates, the force exerted by the first mating portion on the battery pole piece is opposite to the force exerted by the second mating portion on the battery pole piece, that is, it is equivalent to applying a low-intensity outward stretching force on the left and right sides of the large surface direction of the battery pole piece, thereby effectively eliminating wrinkles on the pole piece and avoiding pole piece breakage, thereby ensuring product yield, greatly reducing production costs, and having high reliability.

[0051] As another aspect, the present application provides a wrinkle removal device. Figure 7 As shown, it is a schematic diagram of the structure of a wrinkle removal device provided in an embodiment of the present application. The wrinkle removal device 2 may include a support frame 21, at least one pressing roller 22 arranged between the support frames 21, and a Figures 1 to 6 Corresponding to the wrinkle removal roller 1 of the embodiment. In actual use, the wrinkle removal roller 1 can be installed at a position such as a roll-out pressing part or a winding part, and can also be threaded as needed, for example Figure 8 The wrinkle removal roller 1 shown is fully opened. Fig. 9 The wrinkle removal rollers 1 shown are only opened in two pairs and Fig.10 The wrinkle removal rollers 1 shown are only opened in one pair. Furthermore, the wrinkle removal rollers 1 are in contact with the coated area or non-coated area of ​​the battery pole piece (the contact pressure is adjustable), and by setting a rotation speed different from that of the roller press or coater, such as a speed ratio of 1.01, 1.03 or 1.1, etc., the battery pole piece will be subjected to a pulling force extending from the middle to the left and right sides under the combined effect of the speed difference and the spiral groove, thereby eliminating the wrinkles on the pole piece. Compared with the tension on the pole piece under the same working conditions and the same equipment, the wrinkle removal device 2 of the embodiment of the present application only requires 60% of the original equipment, effectively avoiding the pole piece breakage.

[0052] It should be noted that, when the wrinkle removal device 2 adopts multiple pairs of wrinkle removal rollers 1, the shapes of the spiral grooves of each wrinkle removal roller 1 can be the same or different. For example, the shapes of the spiral grooves of these wrinkle removal rollers 1 are all circular; or, the density of the spiral grooves of each wrinkle removal roller 1 can be the same or different; or, the rotation speed of each wrinkle removal roller 1 can be the same or different, thereby meeting diverse usage requirements.

[0053] Alternatively, if Fig.11 As shown, it is a schematic diagram of the structure of a pressure roller provided in an embodiment of the present application. The two ends of the pressure roller 22 are respectively provided with sliding mechanisms 221 that can adjust the vertical height h between the axis of the pressure roller and the axis of the wrinkle removal roller. The vertical height refers to the distance between the horizontal line where the axis of the pressure roller is located and the horizontal line where the axis of the wrinkle removal roller is located (such as Fig.12As shown), for example, the vertical height h satisfies 0≤h≤80mm. The advantage of such a setting is that the vertical height h corresponding to the pressing roller 22 can be adjusted according to the different wrinkling degrees of the battery electrode sheets, thereby achieving a good wrinkle removal and flattening effect with greater flexibility.

[0054] Alternatively, if Fig.13 and Fig.14 As shown, the wrinkle removal device 2 may also include an edge detector 23 disposed at the belt feed end and a correction mechanism 24 disposed at the bottom of the support frame, wherein the edge detector 23 can locate the center position of the battery electrode, and when the deviation value corresponding to the center position reaches a preset threshold, the correction mechanism 24 is driven to perform a compensatory movement, so that the center of the wrinkle removal roller 1 is always in the same straight line with the center of the battery electrode, ensuring that the forces on the left and right sides of the battery electrode are consistent when stretching, and no unilateral deviation occurs. For example, the edge detector 23 may include but is not limited to edge sensors and ultrasonic sensors, etc., which determine the center position of the battery electrode by detecting the edge distance of the battery electrode. Furthermore, the edge detector 23 may be disposed on both sides of the belt feed end (such as Figure 7 The guide mechanism 24 may include, but is not limited to, a bottom plate 241, a slide rail 242 disposed on the bottom plate 241, and a motor module 243, the motor module 243 being connected to the bottom of the support frame and being driven by the edge detector 23 to drive the support frame 21 to slide along the slide rail 242.

[0055] It should be noted that, for the description of the same contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

[0056] The wrinkle removal device provided in the embodiment of the present application has a wrinkle removal roller in which a first mating portion and a second mating portion are arranged on the surface of the roller body. When the roller body rotates, the force exerted by the first mating portion on the battery pole piece is opposite to the force exerted by the second mating portion on the battery pole piece, that is, it is equivalent to applying a low-intensity outward stretching force on the left and right sides of the large surface direction of the battery pole piece respectively, thereby being able to effectively eliminate wrinkles on the pole piece and avoid pole piece breakage, thereby ensuring product yield, greatly reducing production costs, and having strong reliability.

[0057] As another aspect, the present application provides a battery. The battery 3 has a pole piece through Figures 7 to 14 The wrinkle removing device 2 according to the embodiment removes wrinkles.

[0058] It should be noted that, for the description of the same contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

[0059] The battery provided in the embodiment of the present application has its pole piece dewrinkled by a dewrinkling device, and the dewrinkling roller in the dewrinkling device is provided with a first mating portion and a second mating portion on the surface of the roller body. When the roller body rotates, the force exerted by the first mating portion on the battery pole piece is opposite to the force exerted by the second mating portion on the battery pole piece, that is, it is equivalent to applying a low-intensity outward stretching force on the left and right sides of the large surface direction of the battery pole piece, thereby effectively eliminating wrinkles on the pole piece and avoiding pole piece breakage, thereby ensuring product yield, greatly reducing production costs, and having high reliability.

[0060] As another aspect, an embodiment of the present application provides an electrical device. Fig.15 As shown, it is a structural block diagram of an electric device provided in an embodiment of the present application, and the electric device 4 may include at least one battery 3. For example, the electric device 4 includes but is not limited to a battery electric vehicle (BEV) and a hybrid electric vehicle (HEV).

[0061] It should be noted that, for the description of the same contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

[0062] The embodiment of the present application provides an electrical device, in which the battery pole pieces of the electrical device are dewrinkled using a dewrinkling device, and the dewrinkling roller in the dewrinkling device is provided with a first mating portion and a second mating portion on the surface of the roller body. When the roller body rotates, the force exerted by the first mating portion on the battery pole piece is opposite to the force exerted by the second mating portion on the battery pole piece, that is, it is equivalent to applying a low-intensity outward stretching force on the left and right sides of the large surface direction of the battery pole piece, respectively, thereby being able to effectively eliminate wrinkles on the pole piece and avoid pole piece breakage, thereby ensuring product yield, greatly reducing production costs, and having strong reliability.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A wrinkle removal roller for removing wrinkles from battery pole pieces, characterized in that: The wrinkle removal roller (1) comprises: Roller body (11); A first matching portion (12) and a second matching portion (13) are arranged on the surface of the roller body (11), wherein the force exerted by the first matching portion (12) on the battery pole piece when the roller body (11) rotates is opposite to the force exerted by the second matching portion (13) on the battery pole piece when the roller body (11) rotates.

2. The wrinkle removal roller according to claim 1, characterized in that: The first matching portion (12) and the second matching portion (13) both comprise a spiral groove engraved on the surface of the roller body (11), and the spiral directions of the spiral grooves (121, 131) in the two matching portions are opposite.

3. The wrinkle removal roller according to claim 2, characterized in that: The spiral grooves (121, 131) include any one of a circular groove and a square groove.

4. The wrinkle removal roller according to claim 2, characterized in that: Along a direction parallel to the axis (l) of the roller body (11), a horizontal inclination angle θ of the spiral grooves (121, 131) satisfies 0<θ≤60°; And / or, the depth H of the spiral groove (121, 131) satisfies 0<H≤30mm; And / or, the center distance L1 of adjacent grooves in each of the spiral grooves (121, 131) satisfies 0<L1≤100mm, and the counter-rotation center distance L2 between the spiral grooves (121, 131) satisfies 0<L2≤50mm.

5. The wrinkle removal roller according to claim 1, characterized in that: The first matching portion (12) and the second matching portion (13) both comprise a spiral protrusion adhered to the surface of the roller body (11), and the spiral directions of the spiral protrusions in the two matching portions are opposite.

6. The wrinkle removal roller according to any one of claims 1 to 5, characterized in that: The first matching portion (12) and the second matching portion (13) are symmetrically distributed along the axis (1) of the roller body (11).

7. A wrinkle removal device, characterized in that: The wrinkle removal device (2) comprises a support frame (21), at least one pressing roller (22) arranged between the support frames (21), and a wrinkle removal roller (1) according to any one of claims 1 to 6 that cooperates with the pressing roller (22).

8. The wrinkle removal device according to claim 7, characterized in that: Both ends of the pressing roller (22) are respectively provided with sliding mechanisms (221) capable of adjusting the vertical height h between the axis of the pressing roller and the axis of the wrinkle removal roller.

9. The wrinkle removal device according to claim 8, characterized in that: The vertical height h satisfies 0≤h≤80mm.

10. The wrinkle removal device according to any one of claims 7 to 9, characterized in that: The wrinkle removal device (2) further comprises an edge detector (23) arranged at the belt feed end and a deviation correction mechanism (24) arranged at the bottom of the support frame, wherein the edge detector (23) can locate the center position of the battery electrode sheet and drive the deviation correction mechanism (24) to perform compensatory movement when the deviation value corresponding to the center position reaches a preset threshold value.

11. The wrinkle removal device according to claim 10, characterized in that: The deviation correction mechanism (24) comprises a bottom plate (241), a slide rail (242) arranged on the bottom plate (241), and a motor module (243); the motor module (243) is connected to the bottom of the support frame and can drive the support frame (21) to slide along the slide rail (242) under the drive of the edge detector (23).

12. A battery, characterized in that: The pole piece of the battery (3) is dewrinkled by the dewrinkling device (2) according to any one of claims 7 to 11.

13. An electrical equipment, characterized in that: The electrical device (4) comprises the battery (3) according to claim 12.

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