Battery cell rounding mechanism

Abstract

The utility model discloses a battery cell rounding mechanism which comprises a mechanism back plate, a clamping assembly and a rounding assembly are installed on the mechanism back plate, the clamping assembly can clamp a battery cell into the rounding assembly, the rounding assembly comprises a rounding clamp and a rounding power module, the rounding clamp comprises a left rounding clamp and a right rounding clamp, and the left rounding clamp and the right rounding clamp are arranged on the mechanism back plate. The opposite sides of the left rounding clamp and the right rounding clamp are in a symmetrical semi-arc groove shape, the rounding power module can control the left rounding clamp and the right rounding clamp to be close to each other or away from each other, and when the left rounding clamp and the right rounding clamp are close to each other to form a circle, the left rounding clamp and the right rounding clamp are driven to rotate. The elliptic cylindrical battery cell between the left rounding clamp and the right rounding clamp gradually deforms to be cylindrical, and compared with the mode of rounding the two ends of the battery cell by clamping the two ends of the battery cell by adopting a clamping jaw mode in the prior art, the structure is simpler, and the rounding effect is better.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery production equipment, in particular to a battery cell rounding mechanism. Background Art

[0002] Lithium batteries have the advantages of high energy, long life, small size, light weight, strong adaptability to high and low temperatures, and green environmental protection. With excellent performance, they are widely used in high-demand and fast-growing fields such as new energy vehicles and portable consumer electronics, and are gradually being applied to other product fields, with broad market prospects. Cylindrical lithium batteries are a common type of lithium-ion battery with the advantages of high energy density and long life, and are the preferred power source for many portable electronic devices and power tools.

[0003] At present, in the production process of cylindrical lithium batteries, after the battery cell is wound, it is necessary to carry out the latter stage of shelling, that is, to put the negative electrode of the battery cell into the battery steel shell first. However, due to the change in tension and uneven material thickness during the winding process, the state of the battery cell actually rolled out by the winding machine is generally elliptical, rather than the round battery cell in the ideal state. The deformation of this battery cell has a great influence on the shelling of the battery cell, especially the deformation of the negative electrode of the battery cell and the middle part of the battery cell. The influence on the latter stage of shelling is more obvious. Therefore, between the winding of the battery cell and the latter stage of shelling, the battery cell generally needs to be rounded, that is, the battery cell deformed into an elliptical shape is reshaped into a round shape.

[0004] The cell rounding mechanism in the prior art mainly uses a clamping claw to clamp the two ends of the cell to round the two ends of the cell, which not only has a complex structure but also has a poor rounding effect and an unsatisfactory effect, and it is difficult to achieve the requirement of a roundness within 0.3 mm. Utility Model Content

[0005] The utility model provides a battery cell rounding mechanism with a simple structure and better rounding effect. The specific technical scheme is as follows:

[0006] A battery cell rounding mechanism comprises a mechanism back plate, on which a clamping assembly and a rounding assembly are mounted; the clamping assembly can clamp the battery cell into the rounding assembly; the rounding assembly comprises a rounding clamp and a rounding power module, the rounding clamp comprises a left rounding clamp and a right rounding clamp, and the opposite sides of the left rounding clamp and the right rounding clamp are symmetrical semicircular arc grooves; the rounding power module can control the left rounding clamp and the right rounding clamp to move closer to or farther away from each other.

[0007] Furthermore, a first sliding device and a second sliding device are provided on the back plate of the mechanism; a cam plate is connected to the first sliding device so that the cam plate can slide relative to the back plate of the mechanism, and a cam groove in the shape of an "eight" or an inverted "eight" is provided on the cam plate; a left slide plate and a right slide plate are connected to the second sliding device so that the left slide plate and the right slide plate can slide relative to the back plate of the mechanism, and the sliding direction is perpendicular to the sliding direction of the cam plate; the left slide plate and the right slide plate are respectively connected to the left full circle clamp and the right full circle clamp, and two cam followers which can move on both sides of the cam groove are symmetrically provided on the left slide plate and the right slide plate; the full circle power module can control the cam plate to slide on the first sliding device.

[0008] Furthermore, the first sliding device is at least one slide rail arranged along the height direction.

[0009] Furthermore, the second sliding device is at least one sliding rail perpendicular to the sliding direction of the first sliding device.

[0010] Furthermore, the cam follower is a cylinder whose diameter is adapted to the inner diameter of the cam groove and can move on the cam groove.

[0011] Furthermore, the full-circle power module is a full-circle cylinder.

[0012] Furthermore, the clamping assembly includes a battery cell clamp, a clamp cylinder and upper and lower cylinders. The clamp cylinder can control the tightness of the battery cell clamp, and the upper and lower cylinders can control the up and down movement of the battery cell clamp.

[0013] Furthermore, the battery cell chuck includes a left chuck and a right chuck, and the chuck cylinder can control the left chuck and the right chuck to move closer to or farther away from each other.

[0014] Furthermore, the inner sides of the left clamp and the right clamp are both arc-shaped.

[0015] Furthermore, the axis of the battery cell clamp coincides with the axis of the full-circle clamp.

[0016] The utility model installs a clamping component and a rounding component on the back plate of the mechanism, and the clamping component can clamp the battery cell into the rounding component. The rounding component includes a rounding clamp and a rounding power module. The rounding clamp includes a left rounding clamp and a right rounding clamp. The opposite sides of the left rounding clamp and the right rounding clamp are symmetrical semicircular arc grooves. The rounding power module can control the left rounding clamp and the right rounding clamp to approach or move away from each other. When the left rounding clamp and the right rounding clamp approach each other to form a circle, the elliptical cylindrical battery cell located between the left rounding clamp and the right rounding clamp gradually deforms and becomes a cylinder. Compared with the method of clamping the two ends of the battery cell by means of claws in the prior art to make the two ends of the battery cell round, the structure is more Simple, and the rounding effect is better; further, the clamping assembly includes a battery cell chuck, a chuck cylinder and an upper and lower cylinder, the chuck cylinder can control the tightness of the battery cell chuck, and the upper and lower cylinders can control the up and down movement of the battery cell chuck, the battery cell chuck includes a left chuck and a right chuck, the inner sides of the left chuck and the right chuck are both arc-shaped, and the axis of the battery cell chuck coincides with the axis of the rounding clamp, so that the battery cell chuck and the rounding clamp can work simultaneously, that is, while the battery cell chuck clamps the positive electrode of the battery cell, the rounding clamp rounds the negative end and the middle part of the battery cell, which can make the rounding effect better, especially the rounding effect of the negative electrode and the middle part of the battery cell is better, and it is easier to put into the battery steel shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the battery cell rounding mechanism provided by the utility model Figure 1 .

[0018] Figure 2 Schematic diagram of the battery cell rounding mechanism provided by the utility model Figure 2 .

[0019] Figure 3 This is a schematic diagram of the structural decomposition of the full circle component provided by the utility model.

[0020] Figure 4 The working state of the full circle component provided by the utility model is shown as follows Figure 1 .

[0021] Figure 5 The working state of the full circle component provided by the utility model is shown as follows Figure 2 .

[0022] Figure 6 This is a schematic diagram of the structure of the clamping assembly provided by the utility model.

[0023] Figure 7 The working state of the battery cell rounding mechanism provided by the utility model is shown as follows Figure 1 .

[0024] Figure 8The working state of the battery cell rounding mechanism provided by the utility model is shown as follows Figure 2 .

[0025] Fig. 9 The working state of the battery cell rounding mechanism provided by the utility model is shown as follows Figure 3 .

[0026] Fig.10 This is a schematic diagram of the double-station battery cell full circle mechanism provided by the utility model.

[0027] The figure numbers are as follows: 1 is the mechanism back plate, 11 is the first sliding device, 12 is the second sliding device, 2 is the clamping assembly, 21 is the battery cell chuck, 211 is the left chuck, 212 is the right chuck, 22 is the chuck cylinder, 23 is the upper and lower cylinders, 3 is the full circle assembly, 31 is the full circle clamp, 311 is the left full circle clamp, 312 is the right full circle clamp, 32 is the full circle power module, 321 is the full circle cylinder, 33 is the cam plate, 331 is the cam groove, 34 is the left slide plate, 35 is the right slide plate, 36 is the cam follower, 4 is the battery cell, and 5 is the mounting bracket. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. For the convenience of description, the directions or positional relationships indicated by the terms "front", "rear", "front", "reverse", "left", "right", "top", "bottom", "up", "down", "inside", "outside", "inside", etc. in the present invention are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention and the actual direction of the product or device during production, use, sales, etc. In addition, the terms "first", "second", "third", "fourth", "fifth", etc. 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. Furthermore, in the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "set", "connected", "fixed", "composed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] like Figure 1 , 2As shown, the utility model provides a battery cell rounding mechanism, comprising a mechanism back plate 1, a clamping assembly 2 and a rounding assembly 3; the clamping assembly 2 and the rounding assembly 3 are installed on the mechanism back plate 1; the clamping assembly 2 can clamp the battery cell 4 and transport it to the rounding assembly 3; the rounding assembly 3 comprises a rounding clamp 31 and a rounding power module 32, the rounding clamp 31 comprises a left rounding clamp 311 and a right rounding clamp 312, and the opposite sides of the left rounding clamp 311 and the right rounding clamp 312 are symmetrical semicircular arc grooves; the rounding power module 32 can control the left rounding clamp 311 and the right rounding clamp 312 to approach each other to form a circle, or to move away from each other so that the battery cell 4 can be transported to the middle of the left rounding clamp 311 and the right rounding clamp 312.

[0030] The battery cell rounding mechanism adopts the above structure, wherein the left rounding clamp 311 and the right rounding clamp 312 with semicircular arc grooves on opposite sides are symmetrical and close to each other to form a circle, so that the elliptical cylindrical battery cell located between the left rounding clamp 311 and the right rounding clamp 312 is gradually deformed and becomes cylindrical under the action of the left rounding clamp 311 and the right rounding clamp 312. Compared with the method of clamping the two ends of the battery cell by means of claws to round the two ends of the battery cell in the prior art, the structure is simpler and the rounding effect is better.

[0031] In some embodiments, Figure 3As shown, the mechanism back plate 1 is provided with a first sliding device 11 and a second sliding device 12. In this embodiment, the first sliding device 11 and the second sliding device 12 are both devices composed of a slide rail and a slider. The slider of the first sliding device 11 is connected with a cam plate 33, so that the cam plate 33 can slide relative to the mechanism back plate 1. The cam plate 33 is provided with a cam groove 331, and the cam groove 331 is in an "eight" or inverted "eight" shape (in this embodiment, the cam groove 331 is in an "eight" shape). The second sliding device 12 is provided with two sliders, and the two sliders are respectively connected with a left slider 331. 4 and the right slide plate 35, so that the left slide plate 34 and the right slide plate 35 can slide relative to the mechanism back plate 1, and the sliding direction is perpendicular to the sliding direction of the cam plate 33; the left slide plate 34 and the right slide plate 35 are respectively connected to the left full circle clamp 311 and the right full circle clamp 312, and two cam followers 36 that can move on both sides of the cam groove 331 (i.e., the left and right sides of the cam groove 331 in the shape of "eight" or inverted "eight") are symmetrically arranged on the left slide plate 34 and the right slide plate 35; the full circle power module 32 can control the cam plate 33 to slide on the first sliding device 11. In addition to the above-mentioned structure of a combination of a slide rail and a slider, the first sliding device 11 and the second sliding device 12 may also adopt other methods. For example, the first sliding device 11 may be a belt, and the cam plate 33 is arranged on the belt. The movement of the belt is controlled by the full-circle power module 32 to achieve the sliding of the cam plate 33 relative to the back plate 1 of the mechanism; for example, the second sliding device 12 may be a belt, and the belt is provided with two sliders that can slide on the belt, and the left slider 34 and the right slider 35 are respectively arranged on the two sliders, etc.

[0032] The cell rounding mechanism with the above structure is as follows: Figure 4 As shown, when the cam follower 36 is located outside the cam groove 331 (taking the "eight"-shaped cam groove 331 as an example, that is, when the cam follower 36 is located at the bottom of the cam groove 331), the distance between the left slide 34 and the right slide 35 is the largest, and the distance between the left full-circle clamp 311 and the right full-circle clamp 312 on the left slide 34 and the right slide 35 is also the largest; when the clamping assembly 2 transports the battery cell 4 to between the left full-circle clamp 311 and the right full-circle clamp 312, as shown in FIG. Figure 5As shown, the full circle power module 32 controls the cam plate 33 to slide on the first sliding device 11 (if it is an "eight"-shaped cam groove 331, it moves downward, and if it is an inverted "eight"-shaped cam groove 331, it moves upward), so that the cam follower 36 slides on the second sliding device 12 to a position located on the inner side of the cam groove 331 (taking the "eight"-shaped cam groove 331 as an example, that is, when the cam follower 36 is located at the top of the cam groove 331), the distance between the left slide plate 34 and the right slide plate 35 is the smallest, and the distance between the left full circle clamp 311 and the right full circle clamp 312 located on the left slide plate 34 and the right slide plate 35 is also the smallest. At this time, the left full circle clamp 311 and the right full circle clamp 312 contact each other to form a circle, which can make the battery cell 4 round. The structure is simple and the rounding effect is good.

[0033] In some embodiments, the first sliding device 11 is a slide rail arranged along the height direction, and the number of the slide rail is at least 1, and in this embodiment, 2, so that the sliding of the cam plate 33 on the first sliding device 11 is more stable and the effect is better.

[0034] In some embodiments, the second sliding device 12 is a slide rail perpendicular to the sliding direction of the first sliding device 11, and the number of the slide rails is at least 1, and in this embodiment, 2, so that the sliding of the left slide 34 and the right slide 35 on the second sliding device 12 is more stable and the effect is better.

[0035] In some embodiments, the cam follower 36 is a cylinder, and its diameter is adapted to the inner diameter of the cam groove 331 and can move on the cam groove 331. Using a cylindrical cam follower 36 can make its movement on the cam groove 331 smoother.

[0036] In some embodiments, the full-circle power module 32 is a full-circle cylinder 321. The full-circle cylinder 321 is used as the full-circle power module 32 to control the up and down sliding of the cam plate 33, which has low cost and good effect.

[0037] In some embodiments, Figure 6 As shown, the clamping assembly 2 includes a battery cell clamp 21, a clamp cylinder 22 and an upper and lower cylinder 23; the clamp cylinder 22 can control the tightness of the battery cell clamp 21, thereby realizing the loosening and clamping of the battery cell 4 by the battery cell clamp 21; the upper and lower cylinders 23 can control the up and down movement of the battery cell clamp 21.

[0038] Using the battery cell rounding mechanism with the above structure, when the upper and lower cylinders 23 control the battery cell clamp 21 (loose state) to move downward to the position of the battery cell 4, the battery cell clamp 21 is clamped to clamp the battery cell 4 therein, and then the upper and lower cylinders 23 control the battery cell clamp 21 to move upward to the rounding assembly 3 for rounding.

[0039] In some embodiments, the battery cell clamp 21 includes a left clamp 211 and a right clamp 212 , and the clamp cylinder 22 can control the left clamp 211 and the right clamp 212 to move closer to or farther from each other, thereby achieving the tightness of the battery cell clamp 21 and the loosening and clamping of the battery cell 4 .

[0040] In some embodiments, the inner sides of the left clamp 211 and the right clamp 212 are both arc-shaped. The battery cell clamp 21 with an arc-shaped inner side can better clamp the battery cell 4, which is not easy to fall off and cause secondary deformation of the battery cell 4.

[0041] In some embodiments, the axis of the battery cell clamp 21 coincides with the axis of the round clamp 31. At this time, the battery cell clamp 21 and the round clamp 31 can work simultaneously. Specifically, after the battery cell clamp 21 clamps the positive electrode of the battery cell 4, the battery cell 4 is transported to the round clamp 31. At this time, the battery cell clamp 21 does not need to be loosened, and the left round clamp 311 and the right round clamp 312 are close to each other to form a circle, and the negative end and the middle part of the battery cell 4 are rounded. In this way, the positive electrode of the battery cell 4 is clamped while the negative electrode and the middle part of the battery cell 4 are rounded, which can make the rounding effect better, especially the rounding effect of the negative electrode and the middle part of the battery cell 4 is better, and it is easier to put into the battery steel shell.

[0042] like Figure 7 , 8 9 is a schematic diagram of the working state of the battery cell rounding mechanism. Figure 7 As shown, the upper and lower cylinders 23 control the battery clamp 21 (loose state) to move downward to the position of the battery 4, and then the battery clamp 21 is clamped to clamp the battery 4 therein, and then the upper and lower cylinders 23 control the battery clamp 21 to move upward to the full circle component 3, as shown in FIG. Figure 8 Then, the full circle power module 32 controls the cam plate 33 to slide downward on the first sliding device 11, so that the cam follower 36 slides on the second sliding device 12 to a position located inside the cam groove 331 (taking the "eight"-shaped cam groove 331 as an example, that is, when the cam follower 36 is located at the top of the cam groove 331). Fig. 9As shown, at this time, the distance between the left skateboard 34 and the right skateboard 35 is the smallest, and the distance between the left full circle clamp 311 and the right full circle clamp 312 on the left skateboard 34 and the right skateboard 35 is also the smallest. At this time, the left full circle clamp 311 and the right full circle clamp 312 contact each other to form a circle, and the battery cell 4 can be rounded.

[0043] In some embodiments, Fig.10 As shown, multiple battery cell rounding mechanisms (two in this embodiment) can also be installed on the mounting bracket 5, so that multiple battery cells 4 can be rounded at the same time, which can further improve the rounding efficiency.

[0044] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cell rounding mechanism, characterized in that: The invention comprises a mechanism back plate (1), on which a clamping assembly (2) and a full-circle assembly (3) are mounted; the clamping assembly (2) can clamp a battery cell (4) into the full-circle assembly (3); the full-circle assembly (3) comprises a full-circle clamp (31) and a full-circle power module (32); the full-circle clamp (31) comprises a left full-circle clamp (311) and a right full-circle clamp (312); the opposite sides of the left full-circle clamp (311) and the right full-circle clamp (312) are symmetrical semicircular arc grooves; the full-circle power module (32) can control the left full-circle clamp (311) and the right full-circle clamp (312) to move closer to or farther from each other.

2. The cell rounding mechanism according to claim 1, characterized in that: The mechanism back plate (1) is provided with a first sliding device (11) and a second sliding device (12); the first sliding device (11) is connected with a cam plate (33) so that the cam plate (33) can slide relative to the mechanism back plate (1), and the cam plate (33) is provided with a cam groove (331) in the shape of an "eight" or an inverted "eight"; the second sliding device (12) is connected with a left sliding plate (34) and a right sliding plate (35) so that the left sliding plate (34) and the right sliding plate (35) can slide relative to each other. The mechanism back plate (1) slides, and the sliding direction is perpendicular to the sliding direction of the cam plate (33); the left slide plate (34) and the right slide plate (35) are respectively connected to the left full circle clamp (311) and the right full circle clamp (312), and two cam followers (36) are symmetrically arranged on the left slide plate (34) and the right slide plate (35) and can move on both sides of the cam groove (331) respectively; the full circle power module (32) can control the cam plate (33) to slide on the first sliding device (11).

3. The cell rounding mechanism according to claim 2, characterized in that: The first sliding device (11) is at least one sliding rail arranged along the height direction.

4. The cell rounding mechanism according to claim 2, characterized in that: The second sliding device (12) is at least one sliding rail perpendicular to the sliding direction of the first sliding device (11).

5. The cell rounding mechanism according to claim 2, characterized in that: The cam follower (36) is a cylinder whose diameter is adapted to the inner diameter of the cam groove (331) and can move on the cam groove (331).

6. The cell rounding mechanism according to claim 1, characterized in that: The full-circle power module (32) is a full-circle cylinder (321).

7. The cell rounding mechanism according to claim 1, characterized in that: The clamping assembly (2) comprises a battery cell clamp (21), a clamp cylinder (22) and an upper and lower cylinder (23); the clamp cylinder (22) can control the tightness of the battery cell clamp (21), and the upper and lower cylinders (23) can control the upper and lower movement of the battery cell clamp (21).

8. The cell rounding mechanism according to claim 7, characterized in that: The battery cell clamp (21) comprises a left clamp (211) and a right clamp (212), and the clamp cylinder (22) can control the left clamp (211) and the right clamp (212) to move closer to or farther from each other.

9. The cell rounding mechanism according to claim 8, characterized in that: The inner sides of the left clamp (211) and the right clamp (212) are both arc-shaped.

10. The cell rounding mechanism according to claim 9, characterized in that: The axis of the battery cell clamp (21) coincides with the axis of the full-circle clamp (31).

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