Flattening head and battery cell flattening device

Abstract

The utility model provides a flattening head and a battery cell flattening device, the flattening head comprises a rotating disk, a flattening wheel and a rotation adjusting piece, and the rotating disk is provided with a plurality of inclined first disk surfaces; the plurality of rubbing wheels are arranged on the first disc surface in the circumferential direction of the rotating disc, the rubbing wheels and the first disc surface are arranged in a one-to-one correspondence manner, the axes of the rubbing wheels are parallel to the first disc surface, and the rubbing wheels are used for rubbing the end parts of the battery cells; the plurality of rotary adjusting pieces are arranged in one-to-one correspondence with the rubbing wheels, the rotary adjusting pieces are connected with the rubbing wheels, the rubbing wheels can rotate relative to the rotary adjusting pieces, and the rotary adjusting pieces can enable the rubbing wheels to move in the axis direction of the rubbing wheels. According to the utility model, the problem of low precision of the existing rubbing and flattening head is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a flattening head and a battery core flattening device. Background Art

[0002] Full-ear cylindrical batteries have strong current capacity, low heat generation, and low internal resistance, and are the key development direction of lithium batteries in the future. Flattening is a key process in the manufacturing process of full-ear cylindrical batteries. If the battery cell is not flattened, the end of the battery cell will appear fluffy, and there may be flanges and more burrs. In addition, the end of the battery cell will have a certain degree of divergence in concentricity relative to the battery body. Flattening is to flatten and compact the two ends of the battery cell by mechanical rolling, so that the end face of the battery cell forms a dense plane, ensuring that each layer of the pole piece is tightly combined into one to form a conductive current collector. The flatness of the two ends of the battery cell after flattening directly affects the performance of the finished battery.

[0003] In the prior art, a mechanical flattening head is usually used to mechanically flatten the end of the battery cell. However, the position of the flattening wheel of the existing mechanical flattening head cannot be adjusted, which affects the accuracy of the mechanical flattening head and thus affects the flattening accuracy of the battery cell end face. Utility Model Content

[0004] The utility model solves the problem that the existing flattening head has low precision.

[0005] In order to solve the above problems, the first aspect of the utility model provides a flattening head, comprising:

[0006] A rotating disk having a plurality of inclined first disk surfaces;

[0007] A plurality of flattening wheels are arranged on the first disk surface along the circumference of the rotating disk, the flattening wheels and the first disk surface are arranged in a one-to-one correspondence, the axes of the flattening wheels are parallel to the first disk surface, and the flattening wheels are used to flatten the ends of the battery cells;

[0008] A rotating adjusting member, wherein a plurality of the rotating adjusting members and the flattening wheel are arranged in one-to-one correspondence, the rotating adjusting member is connected to the flattening wheel, the flattening wheel can rotate relative to the rotating adjusting member, and the rotating adjusting member can make the flattening wheel move along its axial direction.

[0009] Furthermore, the rotary adjustment member includes a rotating sleeve and an adjusting tail ring, the smoothing wheel includes a first part and a second part arranged in sequence along the axial direction, the first part of the smoothing wheel is arranged inside the rotating sleeve, the smoothing wheel and the rotating sleeve are rotatably connected, the adjusting tail ring is rotatably connected to an end of the rotating sleeve away from the second part, and the adjusting tail ring can make the smoothing wheel move along its axial direction.

[0010] Furthermore, an end of the rotating sleeve facing away from the second part is provided with an internal thread, and an external thread matching with the internal thread is provided on the outside of the adjusting tail ring.

[0011] Furthermore, the rotary adjustment member also includes a bearing, which is arranged between the first part of the flattening wheel and the rotating sleeve, so that the flattening wheel and the rotating sleeve are rotatably connected, and the bearing abuts against the adjusting tail ring. When the adjusting tail ring rotates inside the rotating sleeve, the bearing drives the flattening wheel to move along the axial direction of the flattening wheel.

[0012] Furthermore, one end of the rotating sleeve away from the adjusting tail ring is arranged as an elastic plate.

[0013] Furthermore, it also includes a locking end ring, which is arranged at an end of the adjusting tail ring away from the second part, and the locking end ring is detachably connected to the adjusting tail ring, and the locking end ring is used to lock the adjusting tail ring.

[0014] Furthermore, the second part of the flattening wheel is provided with a flattening portion, the flattening portion is conical, the flattening portion has a second angle, and the side surface of the flattening portion is used to fit with the end of the battery cell and flatten the end of the battery cell;

[0015] The rotating disk further has a second disk surface arranged in a horizontal direction, a first angle is formed between the first disk surface and the second disk surface, and the second angle is twice the first angle.

[0016] Furthermore, it also includes a center needle, a first end of which is connected to the rotating disk, and a second end of which is used to penetrate into the center hole of the battery cell. The side wall of the center hole is provided with a plurality of grooves, and the grooves and the flattening wheels are arranged in a one-to-one correspondence, and the end of the flattening part extends into the groove.

[0017] Furthermore, the flattening parts of the plurality of flattening heads are all located at the same height of the flattening heads.

[0018] The second aspect of the utility model further provides a battery cell flattening device, comprising the flattening head described in the first aspect.

[0019] The flattening head and battery cell flattening device described in the utility model can flatten the ends of the vertically arranged battery cells by arranging flattening wheels on a rotating disk, and can flatten the ends of the vertically arranged battery cells by means of multiple flattening wheels during the rotation of the rotating disk, and can make the flattening wheels rotate relative to the rotating disk by means of a rotating adjusting member connected to the flattening wheels, so as to ensure the flattening effect on the ends of the battery cells; and the rotating adjusting member can make the flattening wheels move along the axial direction thereof, so as to adjust the height of each flattening wheel, thereby achieving height adjustment of the flattening wheels, so that each flattening wheel can be located at the same height, and each flattening wheel has good height consistency, which is beneficial to improving the flattening accuracy of the flattening head on the end faces of the battery cells, and ensures good consistency in the performance of each battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the flattening head provided in the embodiment of the utility model;

[0021] Figure 2 It is a schematic cross-sectional structure diagram of a flattening head provided in an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotating disk provided in the embodiment of the utility model;

[0023] Figure 4 It is a schematic cross-sectional structural diagram of a rotating disk provided in an embodiment of the utility model;

[0024] Figure 5 It is a front view structural schematic diagram of the rotating sleeve provided in the embodiment of the utility model;

[0025] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the AA plane;

[0026] Figure 7 It is a schematic diagram of the main structure of the kneading wheel in the embodiment of the utility model. DETAILED DESCRIPTION

[0027] The technical solution of the utility model is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the utility model, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying 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 the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, in the description of the utility model, the meaning of "at least one" is one or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the description of this specification, the term "as an optional implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one optional embodiment or optional example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] Combination Figures 1 to 4 As shown, the first aspect of this embodiment provides a flattening head, which includes a rotating disk 10, a flattening wheel 20 and a rotating adjustment member, wherein:

[0031] The rotating disk 10 has a second disk surface 12 and a third disk surface 13 which are parallel to each other, and a plurality of inclined first disk surfaces 11 are arranged between the second disk surface 12 and the third disk surface 13, and the plurality of first disk surfaces 11 are arranged along the circumference of the rotating disk 10, wherein the second disk surface 12 and the third disk surface 13 are arranged in the horizontal direction, and the first disk surface 11 is inclined relative to the second disk surface 12, that is, a first angle B1 is formed between the first disk surface 11 and the second disk surface 12. Specifically, a truncated cone can be selected as the base of the rotating disk 10, and the truncated cone has a second disk surface 12 and a third disk surface 13 which are parallel to each other, and the side surface of the truncated cone is processed to form a plurality of inclined surfaces extending between the second disk surface 12 and the third disk surface 13, that is, the first disk surface 11 is obtained.

[0032] The number of the flattening wheels 20 is the same as the number of the first disk surface 11, and a plurality of the flattening wheels 20 are arranged on the first disk surface 11 along the circumference of the rotating disk 10. The flattening wheels 20 and the first disk surface 11 are arranged one-to-one, and the axis of the flattening wheel 20 is parallel to the first disk surface 11. The flattening wheels 20 are used to flatten the ends of the battery cells. Thus, when flattening the vertically arranged battery cells, a plurality of the flattening wheels 20 flatten the ends of the same battery cell, the rotating disk 10 rotates around the central axis of the battery cell, and the rotating disk 10 drives the plurality of the flattening wheels 20 to rotate, so that the flattening of the ends of the battery cells is completed by the plurality of the flattening wheels 20, and the plurality of the flattening wheels 20 are arranged in the circumferential direction on the rotating disk 10, which can ensure the balance of force on the ends of the battery cells during the flattening process, which is conducive to improving the flattening quality.

[0033] The number of the rotating adjustment members is the same as the number of the flattening wheels 20, and the rotating adjustment members and the flattening wheels 20 are arranged in a one-to-one correspondence. The rotating adjustment members are connected to the flattening wheels 20, and the flattening wheels 20 can rotate relative to the rotating adjustment members, and the rotating adjustment members are fixedly arranged on the rotating disk 10, so that the flattening wheels 20 can rotate relative to the rotating disk 10 to ensure the flattening effect on the ends of the battery cells, and the rotating adjustment members can also move the flattening wheels 20 along their axial direction to adjust the spacing of the ends of each flattening wheel 20 relative to the second disk surface 12 in the vertical direction, that is, to adjust the height of each flattening wheel 20.

[0034] The existing kneading heads usually adopt an integrated structure, and the position adjustment of each kneading wheel is carried out simultaneously. The position error of any kneading wheel will affect the final kneading accuracy. The superposition of the position errors of multiple kneading wheels will cause the overall kneading accuracy of the kneading head to be low. In this embodiment, the position of each kneading wheel is adjusted separately by setting a rotating adjustment part, so that the position of each kneading wheel can maintain good consistency, which is beneficial to improving the overall kneading accuracy of the kneading head.

[0035] The flattening head provided in the present embodiment can flatten the ends of the vertically arranged battery cells by means of a plurality of flattening wheels, by arranging flattening wheels on a rotating disk, during the rotation of the rotating disk, and by arranging a rotating adjustment member connected to the flattening wheels, the rotating adjustment member can make the flattening wheels rotate relative to the rotating disk to ensure the flattening effect on the ends of the battery cells; and the rotating adjustment member can make the flattening wheels move along the axial direction thereof to adjust the height of each flattening wheel, thereby achieving height adjustment of the flattening wheels, thereby making each flattening wheel located at the same height, so that each flattening wheel has good height consistency, which is beneficial to improving the flattening accuracy of the flattening head on the end faces of the battery cells and ensuring good consistency in the performance of each battery cell.

[0036] As an optional implementation, combined with Figure 2 As shown, the rotary adjustment member includes a rotating sleeve 30, an adjusting tail ring 40 and a bearing 50, wherein the rotating sleeve 30 is detachably mounted on the first disk surface 11, for example: Figure 3 and Figure 5 As shown, the first positioning groove 32 is provided on the rotating sleeve 30, and the second positioning groove 14 is provided in the middle area of ​​the first disk surface 11. After the first positioning groove 32 and the second positioning groove 13 are aligned, the limiting pin passes through the first positioning groove 32 and the second positioning groove 14, and the rotating sleeve 30 is installed on the first disk surface 11 through the limiting pin. The flattening wheel 20 includes a first part and a second part sequentially arranged along its axial direction, the first part is arranged inside the rotating sleeve 30, and the second part extends to the outside of the rotating sleeve 30 and is used to flatten the end of the battery cell. The bearing 50 is arranged between the first part of the flattening wheel 20 and the rotating sleeve 30, that is, the inner ring of the bearing 50 is sleeved on the outside of the flattening wheel 20, and the outer ring of the bearing 50 is in contact with the inner wall of the rotating sleeve 30. The flattening wheel 20 and the rotating sleeve 30 are connected in rotation through the bearing 50, so that the flattening wheel 20 can rotate relative to the rotating sleeve 30, thereby realizing the flattening wheel 20 relative to the rotating disk 10. The adjusting tail ring 40 is rotatably connected to the end of the rotating sleeve 30 away from the second part. Figure 6 As shown, an internal thread 33 is provided at one end of the rotating sleeve 30 away from the second part, and an external thread is provided on the outside of the adjusting tail ring 40, and the internal thread 33 and the external thread cooperate to realize the rotational connection between the rotating sleeve 30 and the adjusting tail ring 40; one end of the bearing 50 abuts against the end of the rotating sleeve 30 away from the adjusting tail ring, and the other end of the bearing 50 extends to the area where the internal thread is provided on the rotating sleeve 30, and the bearing 50 abuts against the adjusting tail ring 40, so that when the adjusting tail ring 40 rotates inside the rotating sleeve 30, the adjusting tail ring 40 can drive the bearing 50 to move along the axial direction of the kneading wheel 20, so that the bearing 50 drives the kneading wheel 20 to move along its axial direction, thereby realizing that the height of the kneading wheel 20 is adjustable.

[0037] As an optional embodiment, the end of the rotating sleeve 30 away from the adjusting tail ring 40 is set as an elastic plate 31, so that the elastic plate 31 can be deformed when the bearing 50 is pressed toward the outside of the rotating sleeve 30, so that the bearing 50 can drive the kneading wheel 20 to move along its axial direction.

[0038] As an optional embodiment, the diameter of the first part of the smoothing wheel 20 is smaller than the diameter of the second part, thereby realizing the moving distance of the smoothing wheel 20 along the axial direction and achieving fine adjustment of the smoothing wheel 20 along the axial direction.

[0039] As an optional embodiment, a locking end ring 60 is further included, and the locking end ring 60 is arranged at one end of the adjusting tail ring 40 away from the second part, and the locking end ring 60 is used to lock the adjusting tail ring 40. The locking end ring 60 is detachably connected to the adjusting tail ring 40, so that when the adjusting tail ring 40 adjusts the height of the flattening wheel 20, the locking end ring 60 is removed from the adjusting tail ring 40. After the adjusting tail ring 40 adjusts the height of the flattening wheel 20, the locking end ring 60 is sleeved on the adjusting tail ring 40 to lock the adjusting tail ring 40 to prevent the position of the adjusting tail ring 40 from moving. As an optional embodiment, the locking end ring 60 and the adjusting tail ring 40 can be connected by threads.

[0040] As an optional embodiment, the flattening head further includes a center needle 70, a first end of which is connected to the rotating disk 10, and a second end of which is used to be inserted into the center hole of the battery cell. The center needle 70 is arranged along the rotation axis of the rotating disk 10, and a plurality of flattening wheels 20 are arranged around the center needle 70. Therefore, in the process of flattening the end of the battery cell, the second end of the center needle is inserted into the center hole of the battery cell, so that the center needle can play a positioning role, ensuring that each flattening wheel 20 rotates relative to the central axis of the battery cell, and ensuring the flattening quality of the end of the battery cell. The side wall of the center needle 70 is provided with a plurality of grooves, and the grooves and the flattening wheel 20 are arranged one by one, and the end of the flattening wheel 20 extends into the groove. Therefore, extending the end of the flattening wheel 20 into the groove can reduce the gap between the center needle 70 and the flattening wheel 20, ensure seamless connection between the side wall of the center needle 70 and the wheel surface of the flattening wheel 20, prevent the center hole of the battery cell from being blocked during the flattening process, and ensure that the end of the battery cell is flattened to form a flat and dense plane.

[0041] As an optional implementation, combined with Figure 7As shown, the second part of the flattening wheel 20 is provided with a flattening portion 21 and an extrusion portion 22. The extrusion portion 22 has an extrusion surface for fitting with the periphery of the battery cell. The flattening portion 21 is conical, and the large end of the flattening portion 21 is arranged on the extrusion surface. The small end of the flattening portion 21 extends into the groove. The side of the flattening portion 21 is used to fit with the end of the battery cell and flatten the end of the battery cell. Therefore, in the process of each flattening wheel 20 rotating along with the rotating disk 10, the extrusion surface of the corresponding extrusion portion 22 of each flattening wheel 20 is attached to the periphery of the end of the battery cell. At the same time, the side of the corresponding flattening portion 20 of each flattening wheel 20 contacts the end of the battery cell. Multiple flattening wheels 20 flatten the end of the battery cell simultaneously in the circumferential direction, which greatly improves the flattening efficiency and the flattening effect while ensuring the uniformity of the force on the end of the battery cell.

[0042] In this embodiment, the cone vertex angle of the flattened portion 21 is B2 (i.e., the second included angle), B1=1 / 2×B2, B2 is twice B1, that is, the cone vertex angle of the flattened portion 21 is equal to twice the included angle between the first disk surface 11 and the second disk surface 12. Thus, it is possible to ensure that the end of the battery cell has a better flattening effect, so that the end of the battery cell has better flatness, and the end of the battery cell is prevented from being sunken or convex.

[0043] In this embodiment, each flattening wheel 20 is provided with a rotating adjustment member, and each rotating adjustment member can independently adjust each flattening wheel 20 to move along its axial direction, thereby adjusting the height of the flattening wheel 20, and the difference of each flattening wheel 20 along the vertical direction does not exceed 0.02mm. Preferably, the flattening parts 21 of each flattening wheel 20 are located at the same height, that is, the spacing S between each flattening part 21 and the second disk surface 12 is equal. For example, in this embodiment, three flattening wheels 20 can be arranged along the circumference of the rotating disk 10, and the heights of the ends of the three flattening wheels 20 are S1, S2 and S3, that is, the spacings between each flattening part 21 and the second disk surface 12 are S1, S2 and S3, respectively, and the difference between S1, S2 and S3 does not exceed 0.02mm. Preferably, S1, S2 and S3 are equal. In this way, each flattening wheel 20 can have a good height consistency, which is beneficial to further improve the flattening accuracy of the flattening head on the end surface of the battery cell, ensure that the end of the battery cell has a good flatness, and ensure the consistency of the performance of each battery cell.

[0044] In this embodiment, combined with Figure 6As shown, the difference in spacing between the axis of each kneading wheel 20 and the first disk surface 11 does not exceed 0.005 mm. Preferably, the spacing h between the axis of each kneading wheel 20 and the first disk surface 11 is equal. For example, in this embodiment, three kneading wheels 20 can be arranged along the circumference of the rotating disk 10, and the spacings between the axes of these three kneading wheels 20 and the first disk surface 11 are h1, h2 and h3 respectively, and the difference between h1, h2 and h3 does not exceed 0.005 mm. Preferably, h1, h2 and h3 are equal. Therefore, in this embodiment, each rotating sleeve 30 can be precisely machined so that the difference in spacing between the axis of each kneading wheel 20 and the first disk surface 11 does not exceed 0.005 mm, which is conducive to further improving the kneading accuracy of the kneading head.

[0045] The second aspect of this embodiment provides a battery cell flattening device, which includes the flattening head shown in the first aspect. The battery cell flattening device flattens the ends of the battery cells, which is beneficial to improving the flattening accuracy of the battery cell flattening device and the flattening accuracy of the end faces of the battery cells, thereby ensuring that the performance of each battery cell has good consistency.

[0046] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A flat head. It is characterized in that include: A rotating disk having a plurality of inclined first disk surfaces; A plurality of flattening wheels are arranged on the first disk surface along the circumference of the rotating disk, the flattening wheels and the first disk surface are arranged in a one-to-one correspondence, the axes of the flattening wheels are parallel to the first disk surface, and the flattening wheels are used to flatten the ends of the battery cells; A rotating adjusting member, wherein a plurality of the rotating adjusting members and the flattening wheel are arranged in one-to-one correspondence, the rotating adjusting member is connected to the flattening wheel, the flattening wheel can rotate relative to the rotating adjusting member, and the rotating adjusting member can make the flattening wheel move along its axial direction.

2. The kneading head according to claim 1, It is characterized in that The rotary adjustment member includes a rotating sleeve and an adjusting tail ring, the flattening wheel includes a first portion and a second portion sequentially arranged along an axial direction, the first portion of the flattening wheel is arranged inside the rotating sleeve, the flattening wheel and the rotating sleeve are rotatably connected, the adjusting tail ring is rotatably connected to an end of the rotating sleeve away from the second portion, and the adjusting tail ring can enable the flattening wheel to move along its axial direction.

3. The kneading head according to claim 2, It is characterized in that An end of the rotating sleeve facing away from the second part is provided with an internal thread, and an external thread matching with the internal thread is provided on the outside of the adjusting tail ring.

4. The kneading head according to claim 2, It is characterized in that The rotary adjustment member also includes a bearing, which is arranged between the first part of the flattening wheel and the rotating sleeve, so that the flattening wheel and the rotating sleeve are rotatably connected, and the bearing is in abutment with the adjusting tail ring. When the adjusting tail ring rotates inside the rotating sleeve, the bearing drives the flattening wheel to move along the axial direction of the flattening wheel.

5. The kneading head according to claim 2, It is characterized in that One end of the rotating sleeve away from the adjusting tail ring is arranged as an elastic plate.

6. The kneading head according to claim 2, It is characterized in that It also includes a locking end ring, which is arranged at an end of the adjusting tail ring away from the second part, and the locking end ring is detachably connected to the adjusting tail ring, and the locking end ring is used to lock the adjusting tail ring.

7. The kneading head according to claim 2, It is characterized in that The second part of the flattening wheel is provided with a flattening portion, the flattening portion is conical, the flattening portion has a second angle, and the side surface of the flattening portion is used to fit with the end of the battery cell and flatten the end of the battery cell; The rotating disk further has a second disk surface arranged in a horizontal direction, a first angle is formed between the first disk surface and the second disk surface, and the second angle is twice the first angle.

8. The kneading head according to claim 7, It is characterized in that It also includes a center needle, a first end of which is connected to the rotating disk, and a second end of which is used to penetrate into the center hole of the battery cell. The side wall of the center hole is provided with a plurality of grooves, and the grooves and the flattening wheels are arranged in a one-to-one correspondence, and the end of the flattening part extends into the groove.

9. The kneading head according to claim 7, It is characterized in that The kneading parts of the plurality of kneading heads are all located at the same height of the kneading heads.

10. A battery cell flattening device, It is characterized in that The invention comprises the flattening head as claimed in any one of claims 1 to 9.

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