Tab cutting device

Abstract

The utility model belongs to the technical field of batteries, and discloses a tab cutting device. The tab cutting device comprises a base, a bearing assembly and a cutting mechanism, the bearing assembly comprises a jig and a bearing plate, the bearing plate is used for bearing a battery cell body, the jig is arranged on the bearing plate, and the jig is used for limiting the battery cell body; the cutting mechanism comprises a driving part, an upper cutter group and a lower cutter group, and the lower cutter group is arranged on the bearing plate, located at one end, in the first direction, of the bearing assembly and used for bearing the tabs; the upper cutter set is connected to the output end of the driving part, and the driving part can drive the upper cutter set to move in the direction close to the lower cutter set so as to cut the tabs. According to the tab cutting device, the tab can be prevented from colliding with the lower cutter before being cut, so that the tab is prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a tab cutting device. Background Technology

[0002] Battery cells are one of the essential raw materials for the production of power banks. The tabs on the battery cells are used to connect the battery cells to external electrical sources. During the production process, the tabs need to be welded to other parts. Therefore, in order to ensure that the quality of the produced power banks meets the requirements and reduce the defect rate, the length of the tabs needs to meet the preset requirements. However, the length of the tabs on the raw battery cells cannot be completely consistent with the preset requirements. Therefore, the tabs need to be cut to the preset length before welding them to other parts.

[0003] In existing technology, when cutting electrode tabs, a fixture is generally used. The battery cell body is placed into the battery cell fixture. To facilitate placement by the operator, the battery cell fixture slides with the base. After the battery cell is placed, the battery cell fixture is pushed to the designated position to cut the electrode tab. Because the electrode tab is relatively soft and slightly curved downwards, and the degree of curvature of each electrode tab is different, the free end of the electrode tab is easy to collide with the lower cutter during the pushing process, or the electrode tab needs to be lifted by hand to ensure that the electrode tab is placed on the lower cutter, or it may cause damage to the electrode tab, or increase the operator's operation steps.

[0004] Therefore, there is an urgent need to design a tab cutting device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a tab cutting device that can prevent the tab from colliding with the lower cutting blade before being cut, thereby avoiding damage to the tab.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The tab cutting device includes:

[0008] Base;

[0009] The support assembly slides in a first direction with the base. The support assembly includes a fixture and a support plate. The support plate is used to support the battery cell body. The fixture is disposed on the support plate and is used to limit the battery cell body.

[0010] The cutting mechanism includes a drive unit, an upper cutting blade assembly, and a lower cutting blade assembly. The lower cutting blade assembly is disposed on the support plate and located at one end of the support assembly in a first direction for supporting the electrode tab. The upper cutting blade assembly is connected to the output end of the drive unit, and the drive unit can drive the upper cutting blade assembly to move toward the lower cutting blade assembly to cut the electrode tab.

[0011] As an optional solution, the aforementioned lower cutting blade group includes two lower cutting blades, which are arranged at intervals along a second direction, and each of the lower cutting blades is arranged along the second direction; the aforementioned upper cutting blade group includes upper cutting blades that correspond one-to-one with the lower cutting blades, and the aforementioned driving member is configured to drive the upper cutting blades to move along a third direction, wherein the aforementioned first direction, the aforementioned second direction, and the aforementioned third direction are perpendicular to each other.

[0012] As an optional solution, a first limiting member is also included, which is mounted on the base and configured to restrict the support assembly from moving toward the cutting mechanism in the first direction, so that the lower cutter can cut the tab with the corresponding upper cutter.

[0013] As an alternative, the position of the lower cutter relative to the support plate is adjustable in the first direction.

[0014] As an optional solution, the above-mentioned fixture includes:

[0015] Two second limiting members are spaced apart along a second direction, the distance between the two second limiting members being adapted to the width of the battery cell body, and the second direction being perpendicular to the first direction.

[0016] As an alternative, the distance between the two second limiting members is adjustable in the second direction.

[0017] As an alternative, at least one of the aforementioned second limiting members has an elongated hole, and the locking member passes through the elongated hole and connects to the aforementioned bearing plate.

[0018] As an optional solution, the aforementioned carrier plate includes:

[0019] The support portion slides in conjunction with the base, and the battery cell body is mounted on the support portion.

[0020] A limiting portion protrudes from the supporting portion and extends along the second direction. The limiting portion is used to limit the battery cell body in the first direction. The tab can be placed above the limiting portion.

[0021] As an alternative, in the second direction described above, the blade of the upper cutter is inclined from one end to the other.

[0022] As an alternative, the aforementioned tab cutting device also includes a waste collection component, which is mounted on the base and located below the two aforementioned upper cutting blade assemblies.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model provides a tab cutting device. Before placing the battery cell, the support plate, fixture, and lower cutting blade group are simultaneously slid to a position far from the upper cutting blade group. The battery cell is placed on the support assembly from top to bottom. The battery cell body is supported by the support plate and housed in the fixture. Since the two tabs are placed from top to bottom, they are directly placed on the lower cutting blade group. Then, the support assembly is slid towards the cutting mechanism so that the cutting surfaces of the upper and lower cutting blade groups are almost in the same plane. At this time, the driving member drives the two upper cutting blade groups to descend so that each upper cutting blade group and the lower cutting blade group cut the two tabs together. It can be understood that by making the fixture and the lower cutting blade group movable at the same time, this tab cutting device avoids the relative movement between the battery cell and the lower cutting blade group when moving laterally, thereby avoiding the battery cell colliding with the lower cutting blade group and causing damage to the tabs when moving in the first direction. Attached Figure Description

[0025] To more clearly and understandably illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the battery cell structure provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the tab cutting device provided in this embodiment of the utility model;

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the cutting mechanism provided in an embodiment of the present invention.

[0030] In the picture:

[0031] 10. Base;

[0032] 20. Supporting component; 21. Fixture; 211. Second limiting component; 2111. Elongated hole; 21111. Limiting hole; 21112. Through hole;

[0033] 22. Bearing plate; 221. Supporting part; 222. Limiting part;

[0034] 23. Sliding platform;

[0035] 30. Cutting mechanism; 31. Upper cutter assembly; 311. Upper cutter; 32. Connector; 33. Lower cutter assembly; 331. Lower cutter;

[0036] 40. First limiting component; 50. Waste collection component; 200. Battery cell; 210. Battery cell body; 220. Electrode tab. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] like Figure 1As shown, the battery cell 200 includes a battery cell body 210 and two tabs 220 connected to the same side of the battery cell body 210. The two tabs 220 are arranged at intervals. Before being connected to the battery cell body 210, the length of each tab 220 is different, resulting in different lengths of the tabs 220 after being connected to the battery cell body 210. As a part that connects the battery cell 200 to the outside world, the length of the tab 220 needs to meet specific dimensions to facilitate subsequent welding with other components. Therefore, it is necessary to design a tab cutting device to cut the tabs 220 to a suitable size.

[0042] In the existing cutting process, a fixture is generally used to place the battery cell body into the fixture. To facilitate placement by the operator, the fixture slides with the base. After the battery cell is placed, the fixture is pushed to the designated position to cut the tabs. Because the tabs are relatively soft and slightly curved downwards, the degree of curvature of each tab is different. During the pushing process, the free end of the tab is easy to collide with the lower cutter, or the tab needs to be lifted by hand to ensure that the tab is placed on the lower cutter. However, the operator may still damage the tabs by ignoring this step.

[0043] This embodiment provides a tab cutting device that can prevent the tab 220 from colliding with the lower cutter 22 before being cut, thereby preventing damage to the tab 220. Figure 2 As shown, the electrode cutting device includes a base 10, a support assembly 20, and a cutting mechanism 30. The support assembly 20 includes a fixture 21 and a support plate 22. The support plate 22 is used to support the battery cell body 210. The fixture 21 is disposed on the support plate 22 and is used to limit the battery cell body 210. The cutting mechanism 30 includes a drive member, an upper cutting blade group 31, and a lower cutting blade group 33. The lower cutting blade group 33 is disposed on the support plate 22 and is located at one end of the support assembly 20 in the first direction (X direction in the figure) to support the electrode 220. The upper cutting blade group 31 is connected to the output end of the drive member. The drive member can drive the upper cutting blade group 31 to move in a direction close to the lower cutting blade group 33 (Z direction in the figure, Z direction is perpendicular to X direction) to cut the electrode 220.

[0044] Before placing the battery cell 200, the aforementioned tab cutting device simultaneously slides the support plate 22, fixture 21, and lower cutter group 33 to a position far from the upper cutter group 31. The battery cell 200 is placed on the support assembly 20 from top to bottom. The battery cell body 210 is supported by the support plate 22 and housed in the fixture 21. Since the two tabs 220 are placed from top to bottom, they are directly placed on the lower cutter group 33. Then, the support assembly 20 is slid towards the cutting mechanism 30 so that the upper cutter group 31... The blade surfaces of the upper and lower cutting blade groups 31 are almost in the same plane. At this time, the driving member drives the two upper cutting blade groups 31 to descend so that each upper cutting blade group 31 and the lower cutting blade group 33 jointly cut the two tabs 220. It can be understood that by setting the jig 21 and the lower cutting blade group 33 to be movable at the same time, the relative movement between the battery cell 200 and the lower cutting blade group 33 during the lateral movement is avoided, thereby avoiding the battery cell 200 from colliding with the lower cutting blade group 33 and causing damage to the tabs 220 when moving in the first direction.

[0045] Optionally, such as Figure 2 As shown, the lower cutter group 33 includes two lower cutters 331, which are spaced apart along a second direction (the Y direction in the figure, which is perpendicular to both the X and Z directions). Each lower cutter 331 is positioned along the second direction. The upper cutter group 31 includes upper cutters 311 corresponding to the lower cutters 331. A drive unit is configured to drive the upper cutters 311 to move along a third direction. By spaced apart, the two lower cutters 331 are insulated from each other, preventing short circuits caused by electrical conduction between the positive and negative terminals 220 of the battery cell 200. Both the upper cutter 311 and the lower cutter 331 are made of metal.

[0046] In this embodiment, as Figure 2 As shown, the support assembly 20 also includes a sliding platform 23, which slides in conjunction with the base 10, and the support plate 22 is mounted on the sliding platform 23. Under this premise, the sliding platform 23 can be made of insulating material, such as wood or plastic, while the fixture 21 and the lower cutter 331 are spaced apart to ensure insulation between the two lower cutters 331. There are various ways to achieve sliding between the sliding platform 23 and the base 10. In this embodiment, the base 10 has a groove, and the sliding platform 23 has a downward protrusion; the groove and the protrusion slide in conjunction. In other embodiments, a slide rail and a slider can also be provided between the base 10 and the sliding platform 23 for sliding engagement; these will not be elaborated upon here.

[0047] In other embodiments, the lower cutter 331 may be directly connected to the fixture 21, which is not limited here. In this case, at least the part where the fixture 21 contacts the lower cutter 331 is made of insulating material.

[0048] Optionally, the driving element can be any driving element in the prior art that can output linear motion, such as a cylinder or a linear motor, and is not limited here.

[0049] Optionally, such as Figure 2 As shown, the tab cutting device also includes a first limiting member 40, which is mounted on the base 10. The first limiting member 40 is configured to restrict the support assembly 20 from moving toward the cutting mechanism 30 in the second direction, so that the lower cutter 331 can cut the tab 220 with the corresponding upper cutter 311. With the above configuration, the first limiting member 40 can precisely limit the stopping position of the support assembly 20 when it moves in the first direction. When the support assembly 20 abuts against the first limiting member 40, the lower cutter 331 is located directly below the upper cutter 311. At this time, the upper cutter 311 descends, cuts into the lower cutter 331, and smoothly cuts the tab 220.

[0050] Optionally, the sliding platform 23 can abut against the first limiting member 40 to prevent the lower cutter 331 or the fixture 21 from being impacted and causing a change in position or damage. In other embodiments, the first limiting member 40 can also abut against one end of the support plate 22, which is not limited here.

[0051] Optionally, such as Figure 2 As shown, the fixture 21 includes two second limiting members 211, which are spaced apart in a second direction, and the distance between the two second limiting members 211 is adapted to the width of the battery cell body 210. This configuration allows for limiting the two sides of the battery cell body 210.

[0052] Optionally, such as Figure 2 As shown, the support plate 22 includes a supporting portion 221 and a limiting portion 222. The supporting portion 221 is slidably engaged with the base 10 via a sliding platform 23 and is used to support the battery cell body 210. The limiting portion 222 protrudes from the supporting portion 221 and extends along a second direction. The limiting portion 222 is used to limit the battery cell body 210 in a first direction, and the tab 220 can be placed above the limiting portion 222. Through the above configuration, the limiting portion 222 limits one end of the battery cell 200 in the first direction, that is, the end of the battery cell body 210 connected to the tab 220. When the battery cell body 210 is placed on the supporting portion 221, one end of the battery cell body 210 is limited by the limiting portion 222, and the extended part of the tab 220 naturally overlaps the top of the limiting portion 222, ensuring the consistency of the length of the battery cell 200 each time it is cut.

[0053] Optionally, such as Figure 2 As shown, the distance between the two second limiting members 211 is adjustable. This configuration allows the fixture 21 to accommodate battery cells 200 of different widths.

[0054] Optionally, such as Figure 2and Figure 3 As shown, at least one second limiting member 211 has an elongated hole 2111, and a locking member passes through the elongated hole 2111 and connects to the support plate 22. Specifically, the locking member is a bolt. With the above arrangement, the bolt passes through the elongated hole 2111 and is threadedly connected to the support plate 22. When tightened, the second limiting member 211 is fixed to the support plate 22; when loosened, the position of the corresponding second limiting member 211 in the second direction can be adjusted, thereby adjusting the distance between the two second limiting members 211.

[0055] Optionally, such as Figure 3 As shown, the elongated hole 2111 is a stepped hole. Specifically, the elongated hole 2111 includes a limiting hole 21111 and a through hole 21112 that are connected from top to bottom. The bottom wall of the limiting hole 21111 has the through hole 21112. The head of the bolt abuts against the bottom wall of the limiting hole 21111 and is accommodated in the limiting hole 21111. The shank of the bolt passes through the through hole 21112 and is threadedly connected to the bearing plate 22. With the above arrangement, the locking member can be accommodated in the second limiting member 211, preventing the locking member from protruding and scratching the battery cell body 210.

[0056] Optionally, both second limiting members 211 have elongated holes 2111. That is, the positions of the two second limiting members 211 relative to the carrier plate 22 are adjustable, which can ensure that the position of the battery cell 200 is relatively centered on the carrier plate 22.

[0057] Optionally, each second limiting member 211 has two elongated holes 2111 spaced apart in the first direction, which can ensure the balance of force on each second limiting member 211.

[0058] Optionally, such as Figure 2 As shown, in the first direction, the position of the limiting part 222 relative to the supporting part 221 is adjustable. With this configuration, when the battery cell 200 needs to be cut into tabs 220 of different lengths, only the relative position of the limiting part 222 on the supporting part 221 needs to be adjusted. For example, when a longer tab 220 needs to be cut, the limiting part 222 is adjusted relative to the sliding platform 23... Figure 1 The position can be adjusted in the X-direction; the positions of the first limiting member 40 and the lower cutter 331 do not need to be changed. Specifically, the method for adjusting the relative position of the limiting part 222 to the supporting part 221 can refer to the method for adjusting the position of the second limiting member 211 and the bearing plate 22 described above, and will not be repeated here.

[0059] Optionally, such as Figure 2 and Figure 4As shown, in the second direction, the blade of the upper cutter 311 is inclined from one end to the other. With the above arrangement, when the upper cutter 311 and the lower cutter 331 cut the tab 220, the upper cutter 311 gradually enters the tab 220 from the edge of the tab 220, avoiding the upper cutter 311 and the surface of the tab 220 from contacting each other at the same time, which would easily form burrs.

[0060] Optionally, such as Figure 2 As shown, a connector 32 is installed on the output end of the drive unit, and both upper cutters 311 are connected to the connector 32.

[0061] Optionally, such as Figure 2 As shown, the tab cutting device also includes a waste collection component 50, which is installed on the base 10 and located below the upper cutter group 31, i.e., the two upper cutters 311. With the above arrangement, the waste collection component 50 can collect the cut-off portion of the tabs 220, ensuring the cleanliness of the environment around the tab cutting device.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tab cutting device, characterized in that, include: Base (10); The support assembly (20) slides in a first direction with the base (10). The support assembly (20) includes a jig (21) and a support plate (22). The support plate (22) is used to support the battery cell body (210). The jig (21) is disposed on the support plate (22) and is used to limit the battery cell body (210). The cutting mechanism (30) includes a drive member, an upper cutting blade assembly (31), and a lower cutting blade assembly (33). The lower cutting blade assembly (33) is disposed on the support plate (22) and located at one end of the support assembly (20) in a first direction for supporting the tab (220). The upper cutting blade assembly (31) is connected to the output end of the drive member. The drive member can drive the upper cutting blade assembly (31) to move toward the lower cutting blade assembly (33) to cut the tab (220).

2. The tab cutting device according to claim 1, characterized in that, The lower cutter group (33) includes two lower cutters (331), which are arranged at intervals along a second direction, and each lower cutter (331) is arranged along the second direction; the upper cutter group (31) includes upper cutters (311) that correspond one-to-one with the lower cutters (331), and the driving member is configured to drive the upper cutters (311) to move along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The tab cutting device according to claim 2, characterized in that, It also includes a first limiting member (40) mounted on the base (10), the first limiting member (40) being configured to restrict the support assembly (20) from moving toward the cutting mechanism (30) in the first direction so that the lower cutter (331) can cut the tab (220) with the corresponding upper cutter (311).

4. The tab cutting device according to claim 3, characterized in that, In the first direction, the position of the lower cutter (331) relative to the support plate (22) is adjustable.

5. The tab cutting device according to any one of claims 1-4, characterized in that, The fixture (21) includes: Two second limiting members (211) are spaced apart along a second direction. The distance between the two second limiting members (211) is adapted to the width of the battery cell body (210). The second direction is perpendicular to the first direction.

6. The tab cutting device according to claim 5, characterized in that, In the second direction, the spacing between the two second limiting members (211) is adjustable.

7. The tab cutting device according to claim 6, characterized in that, At least one of the second limiting members (211) has an elongated hole (2111) and a locking member passes through the elongated hole (2111) and is connected to the bearing plate (22).

8. The tab cutting device according to claim 5, characterized in that, The support plate (22) includes: The support part (221) is slidably engaged with the base (10), and the battery cell body (210) is disposed on the support part (221); A limiting part (222) protrudes from the supporting part (221) and extends along the second direction. The limiting part (222) is used to limit the battery cell body (210) in the first direction. The tab (220) can be placed above the limiting part (222).

9. The tab cutting device according to any one of claims 2-4, characterized in that, In the second direction, the blade of the upper cutter (311) is inclined from one end to the other.

10. The tab cutting device according to any one of claims 1-4, characterized in that, The tab cutting device also includes a waste collection component (50), which is mounted on the base (10) and located below the upper cutter assembly (31).

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