Tab bending mechanism of lithium battery

Abstract

The utility model relates to the technical field of lithium battery processing, in particular to a tab bending mechanism of a lithium battery, which comprises a bottom driving seat provided with a top driving seat. The top driving seat is provided with a tab supporting seat, a tab positioning sheet and a bending roller are arranged above the tab supporting seat, the bending roller and the tab positioning sheet are longitudinally aligned with the tab supporting seat, and the long edge of the bending roller is longitudinally aligned with the long edge of the tab supporting seat; before bending, the bottom driving seat can longitudinally move, and then the top driving seat transversely moves to finely adjust the position, so that the tab supporting seat located on the top driving seat can accurately support and position the tab needing to be bent; then, the tab positioning sheet descends to be close to the tab supporting seat to press the tab, then, the bending roller descends, and the tab is bent downwards along the tab supporting seat; by means of the bending rollers, direct contact and damage to the surfaces of the tabs can be reduced in the bending process, and the qualified rate of products is increased.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery processing technology, and in particular to a lithium battery tab bending mechanism. Background Technology

[0002] Lithium-ion batteries, as a new type of rechargeable battery, have advantages such as high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and environmental friendliness. They have broad application prospects in portable electrical appliances, power tools, large-scale energy storage, and electric transportation power supplies.

[0003] Currently, the tab bending device includes an upper bending block and a lower bending block, with the lower bending block located directly below the upper bending block. The upper and lower bending blocks work together to bend the tab. In the prior art, the top surface of the lower bending block is inclined, and the tab is bent using this inclined surface during the tab bending process. However, if the inclination angle of the inclined surface is large, the bending angle of the tab changes significantly, which can easily lead to the tab being bent crooked. During the top sealing process, the crooked tab may misalign with the tab groove, potentially causing direct contact and conductivity between the tab and the aluminum-plastic film, resulting in poor top sealing of the battery cell and adhesive overflow from the tab.

[0004] Among them, utility model application CN202323318741.8 discloses a tab bending device, including a first bending mechanism and a second bending mechanism. The second bending mechanism is located below the first bending mechanism. The second bending mechanism can at least partially move closer to or away from the first bending mechanism along a first direction to press the tab against the lower end face of the first bending mechanism. The angle between the first direction and the horizontal direction is an acute angle. During the bending process of the tab, the second bending mechanism can bend the tab by oblique pushing to ensure that the tab is bent flat, effectively preventing the tab from being bent crooked and causing misalignment between the tab and the tab groove. This prevents the tab from directly contacting and conducting with the aluminum-plastic film during the top sealing process, thereby ensuring the sealing effect of the battery and preventing poor top sealing of the cell and glue overflow from the tab.

[0005] Existing bending equipment used in the lithium battery field often has some limitations. The cells are prone to positional deviations during the transfer process, which affects the subsequent bending accuracy. Furthermore, the electrode surface is easily scratched during the bending process, thereby reducing the overall product qualification rate. Summary of the Invention

[0006] The purpose of this invention is to provide a lithium battery tab bending mechanism to address the shortcomings of existing technologies.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] The electrode bending mechanism of a lithium battery includes a bottom drive seat that can move longitudinally, and a top drive seat that can move laterally. The top drive seat is provided with an electrode support seat for supporting the electrode. An electrode positioning piece and a bending roller for bending the electrode are provided above the electrode support seat. The bending roller and the electrode positioning piece move longitudinally separately. The electrode positioning piece is longitudinally aligned with the electrode support seat, and the long edge of the bending roller is longitudinally aligned with the long edge of the electrode support seat.

[0009] Furthermore, the top drive seat is also provided with a rotating support for mounting the tab support seat. The rotating support includes a rotating shaft, which is connected to the tab support seat.

[0010] Furthermore, the rotating support also includes a support positioning plate, with upright fixed seats installed at both ends of the support positioning plate. The rotating shaft is rotatably mounted on the fixed seats, and the electrode tab support is located between the two fixed seats. A support strip for installing the electrode tab support is provided between the two fixed seats.

[0011] Furthermore, the rotating support also includes a drive motor mounted on the top drive seat. The drive end of the drive motor is equipped with a drive wheel, which is arranged on the same side as one of the rotating shafts. The rotating shaft is equipped with a driven wheel that cooperates with the drive wheel. A synchronous belt is sleeved between the drive wheel and the driven wheel for transmission.

[0012] Furthermore: the top drive seat is provided with a first drive component that drives the electrode positioning plate to move longitudinally and a second drive component that drives the bending roller to move longitudinally.

[0013] Furthermore: the first driving component includes a first longitudinal guide rail arranged longitudinally on the top driving seat, a first movable plate slidingly on the first longitudinal guide rail, a first lifting cylinder arranged longitudinally on the top driving seat, the driving end of the first lifting cylinder being connected to the first movable plate, and a bending roller being longitudinally installed at the bottom of the first movable plate.

[0014] Furthermore: the first movable plate includes a first movable seat that is slidably mounted on the first longitudinal guide rail, the first movable seat is mounted with a pair of parallel and laterally arranged first transverse plates, the ends of the first transverse plates extend downward, and the electrode positioning piece is mounted between the two first transverse plates.

[0015] Furthermore: the second driving component includes a support frame fixed to the top drive seat, the support frame having a second longitudinal guide rail arranged longitudinally, a second movable plate slidably mounted on the second longitudinal guide rail, and a bending roller longitudinally mounted on the bottom of the second movable plate.

[0016] Furthermore: the support frame is equipped with a longitudinally arranged second lifting cylinder, the drive end of the second lifting cylinder is connected to the second movable plate, and the second movable plate is located inside the electrode positioning plate.

[0017] Furthermore: a bottom mounting base is provided at the bottom of the bottom drive seat, and a longitudinally arranged bottom lifting cylinder is installed on the bottom mounting base. The drive end of the bottom lifting cylinder is connected to the bottom drive seat. A transverse guide rail is arranged on the bottom drive seat, and the top drive seat is slidably installed on the transverse guide rail.

[0018] The beneficial effects of this utility model are as follows: Before bending, the bottom drive seat can move longitudinally to the corresponding position, and the top drive seat can then move laterally to fine-tune the position, so that the tab support seat located on the top drive seat can accurately support and position the tab to be bent; then the tab positioning piece descends and approaches the tab support seat to press the tab together, and then the bending roller descends, and the bending roller cooperates with the long edge of the tab support seat, and the tab bends downward along the tab support seat; by using the bending roller, direct contact and damage to the tab surface can be reduced during the bending process, thereby improving the product qualification rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the electrode bending mechanism.

[0020] Figure 2 This is a schematic diagram showing the connection between the bottom drive seat and the bottom mounting seat.

[0021] Figure 3 This is a schematic diagram of the top drive seat.

[0022] Figure 4 This is a schematic diagram of the top drive unit, which hides the first drive component.

[0023] The reference numerals in the figures include:

[0024] 1- Bottom drive mount,

[0025] 11-Bottom mounting base, 12-Bottom lifting cylinder, 13-Horizontal guide rail, 14-Bottom sliding seat,

[0026] 15-Horizontal lead screw drive component, 16-Bottom longitudinal guide rail, 17-Top drive seat,

[0027] 2-First driving component,

[0028] 21-First longitudinal guide rail, 22-First movable plate, 23-First lifting cylinder, 24-Electric tab positioning plate,

[0029] 25-First movable seat, 26-First horizontal plate,

[0030] 3-Second driving component,

[0031] 31-Support bracket, 32-Second longitudinal guide rail, 33-Second movable plate, 34-Bending roller,

[0032] 35-Second lifting cylinder,

[0033] 4-Electrical tab support base,

[0034] 40-Rotating support component, 41-Rotating shaft, 42-Support positioning plate, 43-Fixed seat, 44-Support strip,

[0035] 45-Drive motor, 46-Drive pulley, 47-Driven pulley, 48-Synchronous belt. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings.

[0037] like Figure 1-4 As shown, the lithium battery tab bending mechanism includes a bottom drive seat 1 that can move longitudinally, and a top drive seat 17 that can move laterally. The top drive seat 17 is provided with a tab support seat 4 for supporting the tab. A tab positioning piece 24 and a bending roller 34 for bending the tab are provided above the tab support seat 4. The bending roller 34 and the tab positioning piece 24 can move longitudinally on their own. The tab positioning piece 24 is longitudinally aligned with the tab support seat 4, and the long edge of the bending roller 34 is longitudinally aligned with the long edge of the tab support seat 4.

[0038] Before bending, the bottom drive seat 1 can move longitudinally to the corresponding position, and the top drive seat 17 can then move laterally to fine-tune its position, so that the tab support seat 4 located on the top drive seat 17 can accurately support and position the tab that needs to be bent; then the tab positioning piece 24 descends and approaches the tab support seat 4 to press the tab together, and then the bending roller 34 descends, and the bending roller 34 cooperates with the long edge of the tab support seat 4, and the tab bends downward along the tab support seat 4; by using the bending roller 34, direct contact and damage to the tab surface can be reduced during the bending process, thereby improving the product qualification rate.

[0039] Furthermore, the bottom drive seat 1 is provided with a bottom mounting seat 11, and a longitudinally arranged bottom lifting cylinder 12 is mounted on the bottom mounting seat 11. The driving end of the bottom lifting cylinder 12 is connected to the bottom drive seat 1. The bottom drive seat 1 is provided with a transverse guide rail 13. The top drive seat 17 is slidably mounted on the transverse guide rail 13. The bottom drive seat 1 is provided with a transverse lead screw drive component 15 parallel to the transverse guide rail 13. The driving end of the transverse lead screw drive component 15 is connected to the top drive seat 17. Under the drive of the transverse lead screw drive component 15, the top drive seat 17 moves laterally. The bottom lifting cylinder 12 can adjust the height of the bottom drive seat 1. In addition, the bottom mounting seat 11 is provided with a longitudinally arranged bottom longitudinal guide rail 16. A bottom sliding seat 14 is slidably mounted on the bottom longitudinal guide rail 16. The bottom drive seat 1 is provided with a bottom connecting seat connected to the bottom sliding seat 14 to ensure that the bottom drive seat 1 maintains the stability and accuracy of longitudinal movement during lifting and lowering.

[0040] The top drive seat 17 is provided with a first drive member 2 that drives the electrode positioning piece 24 to move longitudinally and a second drive member 3 that drives the bending roller 34 to move longitudinally.

[0041] The first driving component 2 includes a first longitudinal guide rail 21 arranged longitudinally on the top driving seat 17, a first movable plate 22 slidably mounted on the first longitudinal guide rail 21, a first lifting cylinder 23 arranged longitudinally on the top driving seat 17, the driving end of the first lifting cylinder 23 being connected to the first movable plate 22, and an electrode positioning piece 24 longitudinally mounted on the bottom of the first movable plate 22; under the drive of the first lifting cylinder 23, the first movable plate 22 moves longitudinally along the first longitudinal guide rail 21, and the electrode positioning piece 24 can move longitudinally closer to or further away from the electrode support seat 4.

[0042] Specifically, the first movable plate 22 includes a first movable seat 25 slidably mounted on the first longitudinal guide rail 21. The first movable seat 25 is equipped with a pair of parallel and laterally arranged first transverse plates 26. The ends of the first transverse plates 26 extend downward, and the electrode positioning piece 24 is installed between the two first transverse plates 26. The electrode positioning piece 24 is installed through the first transverse plates 26, leaving enough space for the second drive seat to move.

[0043] The second driving component 3 includes a support frame 31 fixed to the top driving seat 17. The support frame 31 has a second longitudinal guide rail 32 arranged longitudinally. The second longitudinal guide rail 32 is slidably mounted on the second movable plate 33. The bending roller 34 is longitudinally mounted on the bottom of the second movable plate 33. Under the drive of the second lifting cylinder 35, the second movable plate 33 moves longitudinally along the second longitudinal guide rail 32, and the bending roller 34 can move longitudinally closer to or away from the tab support seat 4.

[0044] Specifically, the support frame 31 is equipped with a longitudinally arranged second lifting cylinder 35. The driving end of the second lifting cylinder 35 is connected to the second movable plate 33, which is located inside the electrode positioning piece 24. Under the drive of the second lifting cylinder 35, the second movable plate 33 can move longitudinally, and the bending roller 34 located on the second movable plate 33 can move longitudinally closer to or further away from the electrode support seat 4.

[0045] Furthermore, the top drive seat 17 is also provided with a rotating support 40 for mounting the tab support seat 4. The rotating support 40 includes a rotating shaft 41, which is connected to the tab support seat 4. In this embodiment, after the tab positioned on the tab support seat 4 is bent once by the bending roller 34, the tab support seat 4 rotates 90 degrees under the drive of the rotating support 40, rotating 90 degrees around the bending line of the tab positioning piece 24 as the rotation center. During the rotation, the bending roller 34 rises synchronously. After rotating to the correct position, the tab positioning piece 24 rises and resets, and the tab support seat 4 rotates in the opposite direction to return to its original position, thus completing two 90-degree tab bends. Two bends can be achieved at the same workstation.

[0046] Specifically, the rotating support 40 also includes a support positioning plate 42, with upright fixed seats 43 installed at both ends of the support positioning plate 42. The rotating shaft 41 is rotatably installed on the fixed seats 43, and the electrode tab support 4 is located between the two fixed seats 43. A support strip 44 for installing the electrode tab support 4 is provided between the two fixed seats 43. The electrode tab support 4 is installed through the support strip 44, with both ends of the support strip 44 connected to the rotating shaft 41. The rotating shaft 41 rotates within the fixed seats 43, thereby achieving the bending of the electrode tab.

[0047] Furthermore, the rotating support 40 also includes a drive motor 45 mounted on the top drive seat 17. The drive end of the drive motor 45 is equipped with a drive wheel 46, which is arranged on the same side as one of the rotating shafts 41. The rotating shaft 41 is equipped with a driven wheel 47 that cooperates with the drive wheel 46. A synchronous belt 48 is sleeved between the drive wheel 46 and the driven wheel 47 for transmission. Under the drive of the drive motor 45, the drive wheel 46 and the driven wheel 47 cooperate with the synchronous belt 48 to achieve transmission, thereby driving the tab support 4 to rotate and achieving the bending of the tab.

[0048] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0049] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A tab folding mechanism of a lithium battery, comprising a bottom driving base capable of longitudinal movement, the bottom driving base being provided with a top driving base capable of lateral movement; characterized in that, The top driving base is provided with an ear support base for supporting the tab, an ear positioning sheet above the ear support base, and a bending roller for bending the tab, the ear positioning sheet and the bending roller being longitudinally moved separately, the ear positioning sheet being longitudinally aligned with the ear support base, and the long edge of the bending roller being longitudinally aligned with the long edge of the ear support base.

2. The tab folding mechanism of the lithium battery according to claim 1, characterized in that: The top driving base is further provided with a rotating support for mounting the ear support base, the rotating support comprising a rotating shaft connected with the ear support base.

3. The tab folding mechanism of the lithium battery according to claim 2, characterized in that: The rotating support further comprises a support positioning plate, the support positioning plate being provided with two erected fixing bases at two ends, the rotating shaft being rotatably mounted on the fixing bases, the ear support base being located between the two fixing bases, and a support strip for mounting the ear support base being arranged between the two fixing bases.

4. The tab folding mechanism of the lithium battery according to claim 3, characterized in that: The rotating support further comprises a driving motor mounted on the top driving base, a driving end of the driving motor being provided with a driving wheel arranged on the same side of one of the rotating shafts, the rotating shaft being provided with a driven wheel matched with the driving wheel, and a synchronous belt being transmissionally sleeved between the driving wheel and the driven wheel.

5. The tab folding mechanism of the lithium battery according to claim 1, characterized in that: The top driving base is provided with a first driving device for longitudinally moving the ear positioning sheet and a second driving device for longitudinally moving the bending roller.

6. The tab folding mechanism of the lithium battery according to claim 5, characterized in that: The first driving device comprises a first longitudinal guide rail longitudinally arranged on the top driving base, the first longitudinal guide rail being slidably provided with a first movable plate, the top driving base being longitudinally provided with a first lifting cylinder, a driving end of the first lifting cylinder being connected with the first movable plate, and the bending roller being longitudinally mounted on the bottom of the first movable plate.

7. The mechanism for bending the tab of a lithium battery according to claim 6, characterized in that: The first movable plate comprises a first movable base slidably mounted on the first longitudinal guide rail, the first movable base being provided with a pair of parallel and spaced first transverse plates transversely arranged, the first transverse plates being downwardly extended at the ends, and the ear positioning sheet being mounted between the two first transverse plates. 8.The tab folding mechanism of a lithium battery of claim 5, wherein: The second driving device comprises a support fixing frame fixed to the top driving base, the support fixing frame being longitudinally provided with a second longitudinal guide rail, the second longitudinal guide rail being slidably provided with a second movable plate, and the bending roller being longitudinally mounted on the bottom of the second movable plate.

9. The mechanism for bending the tab of a lithium battery according to claim 8, characterized in that: The support fixing frame is provided with a second lifting cylinder longitudinally arranged, a driving end of the second lifting cylinder being connected with the second movable plate, and the second movable plate being located inside the ear positioning sheet.

10. The tab folding mechanism of a lithium battery according to any one of claims 1 to 9, characterized in that: The bottom driving base is provided with a bottom mounting base at the bottom, the bottom mounting base being provided with a bottom lifting cylinder longitudinally arranged, a driving end of the bottom lifting cylinder being connected with the bottom driving base, the bottom driving base being transversely provided with a transverse guide rail, and the top driving base being slidably mounted on the transverse guide rail.

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