Electrode film guide roller

Abstract

The utility model discloses an electrode film guide roller which comprises a hollow roller body and solid shaft heads, at least one layer of carbon fiber cloth is wound on the outer circumferential face of the roller body, the two ends of the roller body are connected with the shaft heads, the roller body and the shaft heads are made of aluminum alloy materials, and a plurality of reinforcing ribs are arranged on the inner circumferential face of the roller body in the axial direction in a full-length mode. Grooves in one-to-one correspondence with the reinforcing ribs are axially formed in the outer circumferential face of the shaft head, and the shaft head and the roller body are fixedly connected in an embedded mode through the roller body reinforcing ribs and the shaft head grooves. The self-weight of the guide roller can be effectively reduced, the rotation flexibility of the guide roller is improved, the friction between an electrode film and the guide roller can be greatly reduced, and the surface performance of the electrode film is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode film forming equipment, in particular to an electrode film guide roller. Background Art

[0002] Dry electrode technology is one of the most advanced lithium-ion battery manufacturing technologies. When processing electrode membranes, the calender based on dry molding only needs to feed the evenly mixed electrode powder raw materials directly between the rollers of the roller press, and the raw materials can be rolled into electrode membranes through multi-stage rolling of the rollers. The frame of the roller press is generally provided with two relatively rotating rollers and at least one guide roller. After the electrode membrane is formed by the two rollers, it is led out through the guide roller. The existing electrode membrane guide roller generally adopts a steel rod coated with rubber structure. The rubber coating is easy to age, which reduces the service life of the guide roller. The friction coefficient between the rubber coating and the electrode membrane is large, which is easy to damage the surface performance of the electrode membrane. In addition, the overall weight of the existing guide roller is heavy, the moment of inertia is large, and the follow-up performance is poor. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an electrode film guide roller.

[0004] The technical solution adopted by the utility model is:

[0005] An electrode membrane guide roller comprises a hollow roller body and a solid shaft head, the outer circumferential surface of the roller body is wound with at least one layer of carbon fiber cloth, the two ends of the roller body are connected to the shaft head, the roller body and the shaft head are both made of aluminum alloy material, a plurality of reinforcing ribs are axially arranged on the inner circumferential surface of the roller body, the outer circumferential surface of the shaft head is axially arranged with grooves corresponding to the reinforcing ribs, and the shaft head and the roller body are fixedly connected by the roller body reinforcing ribs and the shaft head grooves.

[0006] Furthermore, the shaft head is stepped, including a roller body connecting part, a transition part and a bearing mounting part which are arranged in order from large to small diameters. A groove for connecting the roller body is provided on the roller body connecting part, and an annular groove for installing a bearing retaining ring is provided at one end of the bearing mounting part away from the transition part, and the bearing is installed between the annular groove and the transition part.

[0007] Furthermore, a chamfer is provided at the end of the bearing mounting portion.

[0008] Furthermore, the plurality of reinforcing ribs are evenly distributed along the circumference of the roller body.

[0009] Furthermore, the cross-sections of the plurality of reinforcing ribs are arc-shaped, triangular or trapezoidal.

[0010] Furthermore, the carbon fiber cloth has a gram weight of 300 g / m 2 , wrap 5-10 layers.

[0011] Beneficial effects of the utility model:

[0012] 1. The present application adopts an aluminum alloy roller body and axle head, which can effectively reduce the deadweight of the guide roller and improve its rotation flexibility.

[0013] 2. By wrapping the outer surface of the aluminum alloy roller with carbon fiber cloth, on the one hand, the strength and anti-bending deformation ability of the aluminum alloy guide roller can be increased, and the service life of the guide roller can be improved; on the other hand, since the friction coefficient of the carbon fiber material is only one twentieth of that of steel, the friction between the electrode film and the guide roller can be greatly reduced, protecting the surface performance of the electrode film. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the electrode membrane guide roller of this application.

[0015] Figure 2 This is the shaft head structure diagram of this application.

[0016] Figure 3 for Figure 2 Side view of. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and a preferred implementation manner.

[0018] Example 1

[0019] See also Figure 1-Figure 3 The present embodiment discloses an electrode membrane guide roller, comprising a hollow roller body 10 and two solid shaft heads 20. The outer circumferential surface of the roller body 10 is wrapped with at least one layer of carbon fiber cloth 30. Both ends of the roller body are connected to the shaft heads 20. The roller body 10 and the shaft heads 20 are both made of aluminum alloy.

[0020] The inner circumference of the roller body 10 is provided with 20 reinforcing ribs in the axial direction, and the cross section of the reinforcing ribs is semicircular, and the reinforcing ribs are formed by radially protruding outward from the inner circumference of the roller body. In a specific embodiment, the roller body can be made of an aluminum alloy pipe of a certain thickness, and the reinforcing ribs are machined on the inner surface of the aluminum alloy pipe by milling.

[0021] After the roller body 10 is processed, a carbon fiber cloth 30 is wound around the outer circumference of the roller body 10. The carbon fiber cloth preferably has a gram weight of 300 g / m 2 , winding 5-10 layers. Too many winding layers increase the manufacturing cost. The winding method of the carbon fiber cloth is an existing technology, for example, wet winding can be used.

[0022] The shaft head 20 can be made of aluminum alloy rod, and the shaft head is stepped, including a roller body connecting part 21, a transition part 22 and a bearing mounting part arranged in order from large to small diameters. The outer circumferential surface of the roller body connecting part 21 is axially provided with 20 grooves 211 adapted to the reinforcing ribs. An annular groove 24 for installing a bearing retaining ring is provided at one end of the bearing mounting part away from the transition part. The part 23 between the annular groove 24 and the transition part 22 is used to install the bearing. A chamfer 25 is provided at the end of the bearing mounting part to facilitate the installation of the bearing.

[0023] The machined shaft head 20 is inserted into the two ends of the roller body 10 through its roller body connection part 21 to form a guide roller. During installation, the outer circumference of the shaft head 20 is interference fit with the inner circumference of the roller body 10, the reinforcing rib is inserted into the groove 21, and the end face of the roller body connection part 21 is flush with the end face of the roller body 10. The cooperation of the reinforcing rib and the groove 21 can limit the relative rotation of the shaft head and the roller body, and further strengthen the connection performance between the roller body and the shaft head.

[0024] Example 2

[0025] The only difference between this embodiment and Embodiment 1 is that the cross section of the reinforcing rib is trapezoidal, and the groove of the roller body connecting portion 21 is adapted to the trapezoidal reinforcing rib.

[0026] Example 3

[0027] The only difference between this embodiment and Embodiment 1 is that the cross section of the reinforcing rib is triangular, and the groove of the roller body connecting portion 21 is adapted to the trapezoidal reinforcing rib.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. An electrode film guide roller, characterized in that: It includes a hollow roller body and a solid shaft head. The outer circumference of the roller body is wrapped with at least one layer of carbon fiber cloth. Both ends of the roller body are connected to the shaft head. The roller body and the shaft head are made of aluminum alloy. The inner circumference of the roller body is axially provided with a plurality of reinforcing ribs. The outer circumference of the shaft head is axially provided with grooves corresponding to the reinforcing ribs. The shaft head and the roller body are fixedly connected by the roller body reinforcing ribs and the shaft head grooves.

2. An electrode film guide roller according to claim 1, characterized in that: The shaft head is stepped, and includes a roller body connecting part, a transition part and a bearing mounting part which are arranged in order from large to small diameters. A groove for connecting the roller body is provided on the roller body connecting part. An annular groove for mounting a bearing retaining ring is provided at one end of the bearing mounting part away from the transition part, and the bearing is installed between the annular groove and the transition part.

3. An electrode film guide roller according to claim 2, characterized in that: The end of the bearing mounting portion is provided with a chamfer.

4. The electrode film guide roller according to claim 1, characterized in that: The plurality of reinforcing ribs are evenly distributed along the circumference of the roller body.

5. The electrode film guide roller according to claim 1, characterized in that: The cross sections of the plurality of reinforcing ribs are arc-shaped, triangular or trapezoidal.

6. The electrode film guide roller according to claim 1, characterized in that: The carbon fiber cloth has a gram weight of 300 g / m 2 , wrap 5-10 layers.

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