Tab bending supporting mechanism and tab bending device

Abstract

The utility model relates to the technical field of lithium battery processing, in particular to a tab bending supporting mechanism and a tab bending device. The tab bending structure comprises a plurality of supporting assemblies, and the supporting assemblies are arranged on one sides of the tabs of the battery cell in a one-to-one correspondence mode so as to support the tabs of the battery cell in a one-to-one correspondence mode. Each supporting assembly comprises a supporting block and driving equipment, the supporting blocks can support the non-bent parts of the tabs under the driving of the driving equipment, and the supporting blocks can also retract in the direction away from the tabs under the driving of the driving equipment so as to remove the supporting of the tabs. Therefore, when the positive pole lug of the battery cell is bent, only the support for the positive pole lug is removed, the support for the other pole lugs is retained, and the other pole lugs are still in a fixed state, so that the positive pole lug is effectively prevented from generating twisting force when being bent, and the quality abnormity caused by cracking of the TCO assembly is avoided.

Description

Technical Field

[0001] The present application relates to the field of lithium battery processing technology, and in particular to a tab bending support mechanism and a tab bending device. Background Art

[0002] The 180° bending of the tab is an important step in the processing of lithium batteries. The tab bending device is usually equipped with a support mechanism to simultaneously position multiple tabs of the battery cell. However, when bending two tabs 180°, the support mechanism needs to be withdrawn, causing multiple tabs to lose support at the same time. This causes the positive tab to generate a torsional force when bending. The components surrounding the pad of the positive tab include the TCO component (THERMAL-CUTOFF, temperature fuse). The torsional force generated during the bending of the positive tab will cause the TCO component to be pulled and cracked, resulting in functional problems. Utility Model Content

[0003] The purpose of the utility model is to provide a tab bending support mechanism and a tab bending device, so as to avoid, to a certain extent, the cracking of TCO due to the tab bending.

[0004] The utility model provides a tab bending support mechanism, comprising a plurality of support assemblies, wherein the plurality of support assemblies are arranged at intervals, and the plurality of support assemblies correspond one to one to the plurality of tabs of the battery cell;

[0005] Each of the support assemblies includes a support block and a driving device, wherein the support block is used to support the non-bending portion of the corresponding tab, and the driving device is used to drive the support block to move closer to or away from the corresponding tab.

[0006] Furthermore, the support block is an insulating material support block; or, the outer surface of the support block is plated with an insulating material layer.

[0007] Furthermore, the support block is mounted on the driving end of the driving device through an insulating material piece.

[0008] Furthermore, a fixing block is provided at the driving end of the driving device for mounting the supporting block.

[0009] Furthermore, the driving device is fixedly installed along the first direction through the base, so that the support block moves along the first direction under the drive of the driving device;

[0010] The first direction is perpendicular to the non-bending portion of the tab; or, a predetermined first inclination angle is formed between the first direction and the non-bending portion of the tab.

[0011] Furthermore, the first inclination angle is 45° to 80°.

[0012] Furthermore, the tab includes a bent portion and a non-bent portion along its own extension direction, the support block is located on one side of the non-bent portion of the tab, and the support block is formed with a support portion bent toward the bent portion at one end toward the tab, the support portion is used to support the non-bent portion of the tab, and there is a predetermined second inclination angle between the extension direction of the support portion and the extension direction of the non-bent portion of the tab.

[0013] Furthermore, the second inclination angle is 40° to 60°.

[0014] Furthermore, the driving device is a slide cylinder.

[0015] The utility model also provides a tab bending device, comprising any one of the tab bending support mechanisms described above.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The tab bending structure provided by the present invention includes multiple supporting components, the battery cell includes multiple tabs to be bent, the multiple tabs are arranged at intervals, and the multiple supporting components are arranged on one side of the multiple tabs in a one-to-one correspondence, so as to support the multiple tabs of the battery cell in a one-to-one correspondence through the multiple supporting components. Each support assembly includes a support block and a driving device, and the support block is installed at the driving end of the driving device so as to drive the support block to reciprocate through the driving device; for any corresponding set of support assemblies and pole ears, the support block can be extended toward the pole ear under the drive of the driving device, so as to achieve support for the non-bending part of the pole ear through the support block and the non-bending part of the pole ear. It should be noted that in the pole ear bending device, each pole ear is also provided with a pressure block on the side away from the support assembly, and the pressure block can be pressed on the pole ear to cooperate with the support block to achieve clamping and fixing of the non-bending part of the pole ear; at the same time, the support block can also retract in the direction away from the pole ear under the drive of the driving device to remove the support for the pole ear, so that the bent part of the pole ear can be bent 180° relative to the non-bending part of the pole ear toward the side of the pole ear where the support assembly is provided.

[0018] Therefore, by setting up multiple support components to independently support multiple tabs of the battery cell, when the positive tab of the battery cell is bent, only the support for the positive tab can be removed, and the support for the remaining tabs can be retained, so that the remaining tabs remain in a fixed state, thereby effectively avoiding the torsional force generated when the positive tab is bent, and avoiding cracking of the TCO component and resulting in quality abnormalities.

[0019] The utility model also provides a tab bending device, which includes the tab bending support mechanism, so the tab bending device also has the beneficial effects of the tab bending support mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of the tab bending support mechanism provided by an embodiment of the present invention from a first viewing angle (including two support assemblies);

[0022] Figure 2 A schematic structural diagram of the tab bending support mechanism provided by an embodiment of the present utility model at a second viewing angle;

[0023] Figure 3 This is an enlarged schematic diagram of the support block provided in an embodiment of the present utility model.

[0024] Reference numerals:

[0025] 1-driving device, 2-support block, 21-support portion, 3-insulating material piece, 4-fixing block, 5-base, 6-non-bending portion, a-first direction, b-second direction. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Refer to the following Figures 1 to 3 The tab bending support mechanism and the tab bending device according to some embodiments of the present application are described.

[0032] This application provides a tab bending support mechanism, such as Figure 1 As shown, the tab bending structure includes multiple supporting components, the battery cell includes multiple tabs to be bent, the multiple tabs are arranged at intervals, and the multiple supporting components are arranged on one side of the multiple tabs in a one-to-one correspondence, so as to support the multiple tabs of the battery cell in a one-to-one correspondence through the multiple supporting components.

[0033] Each support assembly includes a support block 2 and a driving device 1, and the support block 2 is installed at the driving end of the driving device 1 to drive the support block 2 to reciprocate through the driving device 1; for any corresponding group of support assemblies and pole ears, the support block 2 can be extended toward the pole ear under the drive of the driving device 1, so as to achieve support for the non-bending part of the pole ear through the support block 2 and the non-bending part 6 of the pole ear. It should be noted that in the pole ear bending device, each pole ear is also provided with a pressure block on the side away from the support assembly, and the pressure block can be pressed on the pole ear to cooperate with the support block 2 to achieve clamping and fixing of the non-bending part 6 of the pole ear; at the same time, the support block 2 can also retract in the direction away from the pole ear under the drive of the driving device 1 to remove the support for the pole ear, so that the bent part of the pole ear can be bent 180° relative to the non-bending part 6 of the pole ear toward the side of the pole ear where the support assembly is provided.

[0034] Therefore, by setting up multiple support components to independently support multiple tabs of the battery cell, when the positive tab of the battery cell is bent, only the support for the positive tab can be removed, and the support for the remaining tabs can be retained, so that the remaining tabs remain in a fixed state, thereby effectively avoiding the torsional force generated when the positive tab is bent, and avoiding cracking of the TCO component and resulting in quality abnormalities.

[0035] In this embodiment, when the battery cell includes two tabs, namely a positive tab and a negative tab, the two tabs are arranged side by side and spaced apart, as shown in FIG. Figure 1 As shown, there are also two support assemblies, which are also arranged side by side and spaced apart. One support assembly is used to provide support for the positive electrode tab, and the other support assembly is used to provide support for the negative electrode tab.

[0036] In one embodiment of the present application, preferably, Figure 1 As shown, for any support assembly, the support assembly also includes a fixed block 4, one end of the fixed block 4 is installed on the driving end of the driving device 1, and the other end of the support block 2 is used to install the support block 2, thereby realizing the installation of the support block 2 on the driving end of the driving device 1, and through the fixed block 4, the support block 2 can have a suitable installation orientation and installation angle on the driving end of the driving device 1.

[0037] In this embodiment, preferably, Figure 1 As shown, the support block 2 is installed on the fixed block 4 of the driving end of the driving device 1 through the insulating material member 3, so that when the two adjacent support components provide support for the positive pole tabs and negative pole tabs of the battery cell one by one, it can avoid the positive and negative pole tabs from being turned on due to the contact between the fixed blocks 4 of the two support components, thereby avoiding a short circuit.

[0038] More preferably, the insulating material piece 3 is made of PEEK (polyetheretherketone), ceramic or PPS (polyphenylene sulfide) or the like.

[0039] In this embodiment, preferably, the support block 2 is an insulating material support block 2 made of an insulating material, such as the support block 2 is made of PEEK (polyetheretherketone), ceramic or PPS (polyphenylene sulfide), etc.; or an insulating material layer is plated on the outer surface of the support block 2, such as a Teflon insulation layer is plated on the outer surface of the support block 2 to insulate the support block 2; so that when the two adjacent support components provide support for the positive and negative pole ears of the battery cell one by one, it can avoid the positive and negative pole ears from being turned on due to the contact between the support blocks 2 of the two support components, thereby avoiding a short circuit.

[0040] In one embodiment of the present application, preferably, the driving device 1 is a slide cylinder, which can accurately control the extension and retraction of the support block 2.

[0041] In one embodiment of the present application, preferably, Figure 1 As shown, the driving device 1 is fixedly mounted on the machine plate of the tab bending device along the first direction a through the base 5, so that the driving device 1 can drive the support block 2 to reciprocate along the first direction a.

[0042] In this embodiment, the first direction a is perpendicular to the non-bending portion 6 of the tab; for example, when the battery cell is placed horizontally, the non-bending portion 6 of the tab is also placed horizontally, and the support assembly supporting the tab is located below the tab. At this time, the first direction a is a vertical direction, and the driving device 1 can drive the support block 2 to rise in the vertical direction to support the tab. The driving device 1 can also drive the support block 2 to descend in the vertical direction to remove the support for the tab.

[0043] Or, as Figure 2 As shown, there is a predetermined first inclination angle A between the first direction a and the length direction (second direction b) of the non-bending portion 6 of the tab; for example, for the non-bending portion of the tab whose length direction extends along the horizontal direction, the support block 2 can be driven by the driving device 1 to extend or retract toward the tab in an oblique manner, thereby avoiding other components in the tab bending device.

[0044] Further preferably, when there is a predetermined first inclination angle between the first direction a and the length direction of the non-bending portion 6 of the tab, the first inclination angle A is 45° to 80°, so as to achieve reasonable utilization of the space of the tab bending device.

[0045] In one embodiment of the present application, preferably, Figure 3 As shown, the tab includes a bent portion and a non-bent portion 6 along its own extension direction, the support block 2 is located below one side of the non-bent portion 6 of the tab, and the support block 2 is bent toward the bent portion of the tab at one end toward the tab to form a support portion 21, and a support surface is formed on the support portion 21 toward one end of the tab to support the non-bent portion 6 of the tab through the support surface, and there is a predetermined second inclination angle B between the extension direction of the support portion 21 and the extension direction of the non-bent portion 6 of the tab.

[0046] By providing the support block 2 with the support portion 21, when the tab is bent, the tab can be bent once with support, and the support portion 21 of the support block 2 forms a buffer for the primary bending; and then the tab can be bent a second time without support, so as to bend the tab 180°.

[0047] Preferably, the second inclination angle B between the extension direction of the support portion 21 and the extension direction of the non-bending portion 6 of the tab is 40° to 60°, so that the tab can be bent once, and the bending angle is 120° to 140°.

[0048] Specifically, the tab bending process is described by taking a battery cell with two tabs (i.e., a positive tab and a negative tab) as an example.

[0049] First, the two tabs of the battery cell are supported one by one by two support blocks 2, and the two pressing blocks in the tab bending device are pressed down to press on the two tabs one by one to fix the two tabs; at this time, the two tabs are bent 90° under the action of the pressing blocks.

[0050] Then, while both tabs are supported, the two tabs are bent once using the bending blocks of the tab bending device, so that both tabs are bent by 120°.

[0051] Then, the support state of the negative electrode tab is maintained, the support of the positive electrode tab is removed, and the positive electrode tab is bent a second time, so that the bent portion of the positive electrode tab is bent 180° relative to the non-bent portion 6.

[0052] Finally, the support of the negative electrode tab is removed, and the negative electrode tab is bent a second time, so that the bent portion of the negative electrode tab is bent 180° relative to the non-bent portion 6 .

[0053] Therefore, through the tab bending support mechanism of the present application, the negative tab of the battery cell can always remain in a supported state when the positive tab is bent, thereby avoiding the torsional force generated when the positive tab is bent, which may cause the TCO component to crack.

[0054] The present application also provides a tab bending device, comprising the tab bending support mechanism of any of the above embodiments.

[0055] In this embodiment, the tab bending device includes a tab bending support mechanism, so the tab bending device has all the beneficial effects of the tab bending support mechanism, which will not be described in detail here.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tab bending support mechanism, characterized in that: The battery comprises a plurality of support assemblies, wherein the plurality of support assemblies are arranged at intervals and correspond one to one with the plurality of tabs of the battery cell; Each of the support assemblies includes a support block and a driving device, wherein the support block is used to support the non-bending portion of the corresponding tab, and the driving device is used to drive the support block to move closer to or away from the corresponding tab.

2. The tab bending support mechanism according to claim 1, characterized in that: The support block is an insulating material support block; or, the outer surface of the support block is plated with an insulating material layer.

3. The tab bending support mechanism according to claim 1, characterized in that: The support block is mounted on the driving end of the driving device through an insulating material piece.

4. The tab bending support mechanism according to claim 1, characterized in that: The driving end of the driving device is provided with a fixing block for mounting the supporting block.

5. The tab bending support mechanism according to claim 1, characterized in that: The driving device is fixedly installed along the first direction through the base, so that the support block moves along the first direction under the drive of the driving device; The first direction is perpendicular to the non-bending portion of the tab; or, a predetermined first inclination angle is formed between the first direction and the non-bending portion of the tab.

6. The tab bending support mechanism according to claim 5, characterized in that: The first inclination angle is 45° to 80°.

7. The tab bending support mechanism according to claim 1, characterized in that: The tab includes a bent portion and a non-bent portion along its own extension direction, the support block is located on one side of the non-bent portion of the tab, and a support portion bent toward the bent portion is formed at one end of the support block toward the tab, the support portion is used to support the non-bent portion of the tab, and there is a predetermined second inclination angle between the extension direction of the support portion and the extension direction of the non-bent portion of the tab.

8. The tab bending support mechanism according to claim 7, characterized in that: The second inclination angle is 40° to 60°.

9. The tab bending support mechanism according to claim 1, characterized in that: The driving device is a slide cylinder.

10. A tab bending device, characterized in that: The invention comprises the tab bending support mechanism according to any one of claims 1 to 9.

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