A Z-shaped bending machine for soft package battery tab

Abstract

The application discloses a Z-shaped bending machine for soft package battery cell tabs, comprising a plurality of bending devices, each of which comprises a bending support, a base, a lifting driving unit, an upper bending mechanism, a lower bending mechanism and a pressing structure, the upper bending mechanism comprises an upper bending driving cylinder, an upper bending cutter and a pre-pressing block, the pressing structure comprises a pressing finger and a pressing connecting assembly, and the lower bending mechanism comprises a lower bending driving cylinder and a lower bending cutter; when the tab is bent, the root of the tab is pressed by the pre-pressing block driven by the upper bending driving cylinder, the lower bending cutter is driven by the lower bending lifting driving cylinder to ascend and push the tab upwards from below to tightly adhere to the lower surface of the upper bending cutter and the inner side surface of the pre-pressing block to realize the bending of the tab. Therefore, the application can realize the automatic bending of the battery cell tabs, the bending forces are the same, the bending degrees of the tabs of different battery cells are consistent, and the consistency and the yield are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical devices, in particular to a Z-shaped bending machine for soft-pack battery cell tabs. BACKGROUND

[0002] In the contemporary pursuit of clean and environmentally friendly energy development, new energy vehicles are widely used in people's lives. The battery cell of a vehicle is the heart of an electric vehicle. Multiple battery cells are assembled into a battery cell assembly, and multiple battery cell assemblies form an entire battery cell module. The battery cell module can be generally regarded as a rectangular cuboid.

[0003] In the production process of the above-mentioned battery cell module (or lithium battery), the tabs of a single battery cell usually need to be bent. At present, most of the tab bending operations are performed manually. However, due to the difference in manual force, the degree of tab bending is inconsistent, affecting consistency and accuracy. In addition, due to the different control abilities of each worker, the tabs are easily broken, thereby increasing the rate of defective products. SUMMARY

[0004] The technical problem solved by the present application is to provide a Z-shaped bending machine for soft-pack battery cell tabs. The structure is ingenious. The present application can automatically bend the tabs of the battery cell. The bending force is the same, so the bending degree of the tabs of different battery cells is consistent. Therefore, the consistency and the rate of good products are guaranteed.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a Z-shaped bending machine for soft-pack battery cell tabs. The bending machine comprises a plurality of bending devices. Each bending device comprises a bending support, a base, a lifting driving unit, and an upper bending mechanism, a lower bending mechanism, and a pressing structure arranged on the base. The base is installed on the surface of the bending support and is driven to lift the base by the lifting driving unit.

[0006] The upper bending mechanism comprises an upper bending driving cylinder, an upper bending knife, and a pre-pressing block. The pre-pressing block is installed on the lower side of the front end of the upper bending knife, and the height of the pre-pressing block on the upper bending knife can be adjusted. The lower end of the push rod of the upper bending driving cylinder is fixedly installed on the upper part of the upper bending knife.

[0007] The pressing structure comprises a pressing finger and a pressing connection assembly. The upper end of the pressing finger is fixed to the pressing connection assembly. The pressing finger is fixed to the base through the pressing connection assembly. The lower end of the pressing finger passes through the longitudinal through hole in the interior of the upper bending knife and can be extended out.

[0008] The lower bending mechanism comprises a lower bending driving cylinder and a lower bending knife. The lower bending knife is installed on the upper end of the push rod of the lower bending driving cylinder.

[0009] When the tab is bent, the root of the tab is pressed by the pre-pressing block driven by the upper bending driving cylinder, the lower bending knife is driven to rise by the lower bending lifting driving cylinder, and the tab is pushed upward from below to tightly adhere to the lower surface of the upper bending knife and the inner side surface of the pre-pressing block to realize the bending of the tab.

[0010] Further, the upper bending mechanism further comprises a connecting plate, a first bolt and a second bolt, the surface of the pre-pressing block is provided with a plurality of longitudinally extending waist-shaped holes, the upper bending knife is provided with a locking hole, the different positions of the waist-shaped holes are aligned with the locking hole to be locked by the first bolt to realize the fixation of the pre-pressing block and the adjustment of the installation height; the connecting plate is fixedly installed on the surface of the upper bending knife, and the pre-pressing plate is fixed on the connecting plate from the longitudinal direction by the second bolt passing through the longitudinal hole positions of the connecting plate and the pre-pressing block.

[0011] Further, the lower end surface of the pre-pressing block and the side close to the upper bending knife form a material pressing step, the height of the material pressing step is 0.08-0.12mm, and the width is 0.4-0.8mm.

[0012] Further, the lower end of the base is fixedly installed with a supporting block, the supporting block is located directly below the pre-pressing block.

[0013] The upper end surface of the supporting block and the side close to the lower bending knife form a supporting step, the height of the supporting step is 0.4-0.6mm, and the width is 1.0-1.4mm.

[0014] Further, the material pressing connecting assembly comprises a horizontal plate and two side plates, the middle of the horizontal plate has a U-shaped groove for the push rod of the upper bending driving cylinder to pass through, the two material pressing fingers are respectively located on both sides of the push rod of the upper bending driving cylinder and are fixed at the upper end of the horizontal plate, the two ends of the horizontal plate are respectively fixed on the side plates, and the two side plates are respectively fixed on both sides of the base.

[0015] Further, the upper part of the surface of the lower bending knife forms a step groove, the depth of the step groove is 0.25-0.30mm and the height is 8-12mm.

[0016] Further, the bending device further comprises a bending translation driving mechanism for driving the translation of the bending support, the bending translation driving mechanism is a servo motor driving screw nut transmission mechanism, and the nut is fixed at the bottom of the bending support.

[0017] Further, the bending machine further comprises a rack, a plurality of positioning mechanisms arranged on the rack and a plurality of visual detection mechanisms arranged on the rack, the number of the positioning mechanisms, the visual detection mechanisms and the bending devices is the same; the positioning mechanism comprises a pneumatic clamp jaw, a clamp jaw seat and a positioning lifting driving air cylinder capable of driving the clamp jaw seat to lift, the pneumatic clamp jaw is installed on the clamp jaw seat, the clamp jaw seat is installed on the lower end of the positioning lifting driving air cylinder, and the electric core is clamped and positioned from both sides through the pneumatic clamp jaw;

[0018] The visual detection mechanism is a visual detection camera, and a light source required by the visual detection mechanism is installed on the support block.

[0019] The beneficial effects of the present application are:

[0020] The bending machine comprises a plurality of bending devices, each bending device comprises a bending support, a base, a lifting driving unit, an upper bending mechanism, a lower bending mechanism and a pressing structure, the upper bending mechanism comprises an upper bending driving air cylinder, an upper bending knife and a pre-pressing block, the pressing structure comprises a pressing finger and a pressing connecting assembly, and the lower bending mechanism comprises a lower bending driving air cylinder and a lower bending knife; when the tab is bent, the root of the tab is pressed by the pre-pressing block driven by the upper bending driving air cylinder, the lower bending knife is driven by the lower bending lifting driving air cylinder to ascend and push the tab upwards from below to tightly adhere to the lower surface of the upper bending knife and the inner side surface of the pre-pressing block, so that the automatic bending of the tab of the electric core is realized, the bending force is the same, the bending degree of the tabs of different electric cores is uniform, and therefore the consistency and the yield rate are guaranteed.

[0021] Furthermore, the pressing structure is specially arranged because waste chips are generated in the bending process of the tab, the knife is easily stuck, the tab may be lifted when the upper bending knife is lifted after the tab is bent, the electric core is pulled, and the electric core is scrapped, so the pressing structure is specially arranged, the upper bending knife is lifted when the pressing finger presses the tab, and the above problems can be well solved, and the yield rate of the bending process of the electric core is guaranteed.

[0022] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and the content of the specification can be implemented, the following preferred embodiments of the present application are described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structure schematic view of the bending device of the present application;

[0024] Figure 2 is a structure schematic view of the bending device of the present application;

[0025] Figure 3is a structure schematic view of the bending device of the present application (bending translation driving mechanism is not shown);

[0026] Figure 4 is a right view of the bending device of the present application (bending translation driving mechanism is not shown);

[0027] Figure 5 is a partial enlarged view of A part of the present application Figure 4 ;

[0028] Figure 6 is a structure schematic view of the bending device of the present application (bending translation driving mechanism and battery cell are not shown);

[0029] Figure 7 is an exploded structure schematic view of the bending device of the present application;

[0030] Figure 8 is a right view of the lower bending knife of the present application;

[0031] Figure 9 is a mechanism schematic view of the bending machine of the present application;

[0032] Figure 10 is a structure schematic view of the rack of the present application;

[0033] The parts in the drawings are marked as follows:

[0034] bending device 1, bending support 11, base 12, lifting driving unit 13, upper bending mechanism 14, upper bending driving cylinder 141, upper bending knife 142, pre-pressing block 143, waist-shaped hole 1431, pressing material step 1432, connecting plate 144, second bolt 145, lower bending mechanism 15, lower bending driving cylinder 151, lower bending knife 152, step groove 1521, pressing material structure 16, pressing material finger 161, cross plate 162, side plate 163, supporting block 17, supporting step 171, bending translation driving mechanism 18;

[0035] rack 2;

[0036] positioning mechanism 3, pneumatic clamping jaw 31, clamping jaw seat 32, positioning lifting driving cylinder 33;

[0037] visual detection mechanism 4, light source 41;

[0038] battery cell 10, tab 101. DETAILED DESCRIPTION

[0039] The advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented in other different ways, i.e., different modifications and changes can be made without departing from the scope disclosed by the present application.

[0040] The position descriptions such as up, down, left and right in the present embodiment are based on the orientation in the drawings and have no special meaning and are not used to limit the protection scope of the present application.

[0041] Embodiment: A Z-type bending machine for soft package battery tab, as shown in the figure, the bending machine comprises a plurality of bending devices 1, each bending device 1 comprises a bending support 11, a base 12, a lifting driving unit 13 and an upper bending mechanism 14, a lower bending mechanism 15 and a pressing structure 16 (as shown in the figure) provided on the base, the base is installed on the surface of the bending support and the base is driven to lift by the lifting driving unit; Figures 1 to 10 Figure 7

[0042] As shown in the figure, the upper bending mechanism 14 comprises an upper bending driving cylinder 141, an upper bending knife 142 and a pre-pressing block 143, the pre-pressing block is installed on the lower side of the front end of the upper bending knife and the height of the pre-pressing block on the upper bending knife can be adjusted; the lower end of the push rod of the upper bending driving cylinder is fixedly installed on the upper part of the upper bending knife; Figures 3 to 7

[0043] As shown in the figure, the pressing structure 16 comprises a pressing finger 161 and a pressing connecting assembly, the upper end of the pressing finger is fixed to the pressing connecting assembly, the pressing finger is fixed to the base through the pressing connecting assembly, and the lower end of the pressing finger passes through the longitudinal through hole inside the upper bending knife and can be stretched out; Figures 3 to 7

[0044] As shown in the figure, the lower bending mechanism 15 comprises a lower bending driving cylinder 151 and a lower bending knife 152, the lower bending knife is installed on the upper end of the push rod of the lower bending driving cylinder; Figures 3 to 7

[0045] When the tab is bent, the pre-pressing block is driven by the upper bending driving cylinder to press the root of the tab, the lower bending knife is driven by the lower bending lifting driving cylinder to rise from below and push the tab upwards to tightly adhere to the lower surface of the upper bending knife and the inner side surface of the pre-pressing block to realize the bending of the tab.

[0046] In the present embodiment, as shown in the figure, Figures 3 to 7 ​​​​​As shown, the upper bending mechanism 14 further comprises a connecting plate 144, a first bolt (not shown) and a second bolt 145, the surface of the pre-pressing block is provided with a plurality of longitudinally extending waist-shaped holes 1431, the upper bending knife is provided with a locking hole (not shown), the different positions of the waist-shaped holes are aligned with the locking hole and locked (locked from the transverse direction) by the first bolt to fix the pre-pressing block and adjust the installation height; the connecting plate is fixedly installed on the surface of the upper bending knife, and the pre-pressing plate is fixed on the connecting plate from the longitudinal direction by the second bolt passing through the longitudinal hole positions of the connecting plate and the pre-pressing block. The height of the pre-pressing block can be adjusted to adapt to the bending requirements of the tabs of different thicknesses or the tabs of different heights after bending.

[0047] In the embodiment, the lifting driving unit is a lifting driving cylinder, the end of the push rod of the lifting driving cylinder is fixed on the upper end of the base, and a linear guide rail structure is arranged between the bending support and the base to ensure the stability and smoothness of the base during the up-and-down movement of the base along the bending support.

[0048] In the embodiment, the material pressing structure is specially arranged because waste will be generated during the bending of the tab, which is easy to jam the knife, that is, the tab may be lifted up when the upper bending knife is lifted up after the tab is bent, which may pull the battery cell and cause the battery cell to be scrapped, so the special material pressing structure is arranged, and the upper bending knife is lifted up when the tab is pressed by the material pressing structure, which can well solve the above problems.

[0049] In the embodiment, as shown in Figure 5 The lower end surface of the pre-pressing block and the side close to the upper bending knife form a material pressing step 1432, the height of the material pressing step is 0.08-0.12 mm, and the width is 0.4-0.8 mm.

[0050] In the embodiment, as shown in Figure 3 and Figure 7 The lower end of the base is fixedly installed with a supporting block 17, and the supporting block is located directly below the pre-pressing block.

[0051] As shown in Figure 5 The upper end surface of the supporting block and the side close to the lower bending knife form a supporting step 171, the height of the supporting step is 0.4-0.6 mm, and the width is 1.0-1.4 mm.

[0052] The design of the material pressing step of the pre-pressing block facilitates the pressing force of the pre-pressing block to act on the root of the tab, and the design of the supporting step of the supporting block considers the avoidance of the glue coating at the connection between the battery cell body and the tab, so that the supporting block has sufficient supporting force. The size design of the material pressing step of the pre-pressing block and the supporting step of the supporting block is reasonable, which ensures the best supporting effect and pressing effect.

[0053] In the embodiment, as shown in Figures 3 to 7As shown, the material pressing connecting assembly includes a cross plate 162 and two side plates 163, the middle of the cross plate has a U-shaped groove for facilitating the push rod of the upper bending driving cylinder to pass through, two material pressing fingers are respectively located on both sides of the push rod of the upper bending driving cylinder and are fixed at the upper end of the cross plate, the two ends of the cross plate are respectively fixed on the side plates, and the two side plates are respectively fixed on the two sides of the base. The above structure design of the material pressing connecting assembly is to realize that the material pressing fingers can press the tabs and do not interfere with the upper bending mechanism, and the material pressing fingers can remain stationary to play a role in pressing the material when the pre-pressing block and the upper bending knife move up and down.

[0054] In this embodiment, as shown in Figure 5 and Figure 8 As shown, the upper part of the surface of the lower bending knife forms a step groove 1521, the depth of the step groove is 0.25-0.30 mm and the height is 8-12 mm. As shown in Figure 5 The height of the step groove is greater than or equal to the height of the tab after bending, and the main purpose of the step groove here is to correspond to the thickness of the tab when the lower bending knife is pushed upward, so as to avoid the tab being pushed upward too hard and the bending part of the tab being not smooth enough.

[0055] In this embodiment, as shown in Figure 2 The bending device further includes a bending translation driving mechanism 18 for driving the translation of the bending support, the bending translation driving mechanism is a servo motor driving screw nut transmission mechanism, and the nut is fixed at the bottom of the bending support. This driving mechanism is a prior art, and thus will not be described in detail.

[0056] In this embodiment, as shown in Figure 9 and Figure 10 As shown, the bending machine further includes a rack 2, a plurality of positioning mechanisms 3 arranged on the rack and a plurality of visual detection mechanisms 4 arranged on the rack, the number of the positioning mechanisms, the visual detection mechanisms and the bending devices is the same; the positioning mechanism 3 includes a pneumatic clamp jaw 31, a clamp jaw seat 32 and a positioning lifting driving cylinder 33 capable of driving the lifting of the clamp jaw seat, the pneumatic clamp jaw is installed on the clamp jaw seat, the clamp jaw seat is installed at the lower end of the positioning lifting driving cylinder, and the electric core 10 is positioned by the pneumatic clamp jaw clamped from both sides;

[0057] The visual detection mechanism is a visual detection camera, and the light source 41 required by the visual detection mechanism is installed on the support block. Figure 9 In this embodiment, four groups of bending devices are provided, each group of bending devices includes two bending devices, and the two groups of bending devices simultaneously bend the tabs at the two ends of the electric core. Figure 9 The bending machine can simultaneously bend the tabs at the two ends of four electric cores.

[0058] Working principle and working process of the present application:

[0059] The positioning driving mechanism drives the positioning lifting driving cylinder to drive the clamping jaw seat to a position, the positioning lifting driving cylinder drives the pneumatic clamping jaw to clamp the battery cell from both sides, the visual detection mechanism takes a photo of the battery cell to determine the position of the battery cell, and transmits the data to the control system of the bending machine, synchronously determines the compensation value, interacts with the PLC, and transmits the compensation value to the servo motor of the bending translation driving mechanism to drive the bending support to move, at this time, the support steps of the support block support the tab of the battery cell, and then the bending device bends the tab of the battery cell, and the state of the bent tab 101 is as shown in Figure 5 .

[0060] The specific process of bending is as follows:

[0061] The lifting driving unit drives the base and all structures mounted on the base to descend to a position, then the upper bending driving cylinder drives the upper bending knife and the pre-pressing block to a position, the pre-pressing block presses the root of the tab (the tab is horizontal before being bent, and the root of the tab refers to the connection between the tab and the battery cell body), the inner side of the pre-pressing block and the lower surface of the upper bending knife are located at a position and have a shape corresponding to the upper surface of the tab after being bent, at this time, the lower surface of the pressing finger and the lower surface of the upper bending knife are flush or slightly higher than the lower surface of the upper bending knife, so that the lower surface of the pressing finger does not interfere with the tab when the upper bending knife is lifted, and the lower surface of the upper bending knife can block or press the tab to prevent the tab from being lifted by the upper bending knife; then, the lower bending lifting driving cylinder drives the lower bending knife to ascend and push the tab upward to be close to the lower surface of the upper bending knife and the inner side of the pre-pressing block, at this time, the tab is bent into the required shape (as shown in Figure 5 ), at this time, the pressing finger presses the tab, then the upper bending driving cylinder drives the upper bending knife and the pre-pressing block to lift, the lower bending driving cylinder drives the lower bending knife to descend, and then the battery cell can be taken out;

[0062] The state shown in Figure 5 is that after the tab is bent, the pre-pressing block and the upper bending knife are lifted upward, the lower bending knife is withdrawn downward, and then a state of waiting for taking out the material.

[0063] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or direct or indirect application in other related technical fields based on the content of the specification and drawings of the present application is also included in the patent protection scope of the present application.

Claims

1. A soft pack battery cell tab Z-bender, characterized in that: The bending machine comprises a plurality of bending devices (1), each of which comprises a bending support (11), a base (12), a lifting driving unit (13), an upper bending mechanism (14), a lower bending mechanism (15) and a pressing structure (16) arranged on the base, the base is installed on the surface of the bending support and is driven to lift the base by the lifting driving unit; The upper bending mechanism (14) comprises an upper bending driving cylinder (141), an upper bending knife (142) and a pre-pressing block (143), the pre-pressing block is installed on the lower side of the front end of the upper bending knife and the height of the pre-pressing block on the upper bending knife can be adjusted, and the lower end of the push rod of the upper bending driving cylinder is fixedly installed on the upper part of the upper bending knife; The pressing structure (16) comprises a pressing finger (161) and a pressing connecting assembly, the upper end of the pressing finger is fixed to the pressing connecting assembly, the pressing finger is fixed to the base through the pressing connecting assembly, and the lower end of the pressing finger penetrates through the longitudinal through hole in the upper bending knife and can be extended out; The lower bending mechanism (15) comprises a lower bending driving cylinder (151) and a lower bending knife (152), and the lower bending knife is installed on the upper end of the push rod of the lower bending driving cylinder; When the tab is bent, the pre-pressing block is driven by the upper bending driving cylinder to press the root of the tab, the lower bending knife is driven by the lower bending lifting driving cylinder to ascend and push the tab upward from below to tightly adhere to the lower surface of the upper bending knife and the inner side surface of the pre-pressing block, so that the tab is bent.

2. The soft pack cell tab Z-bender machine of claim 1, wherein: The upper bending mechanism (14) further comprises a connecting plate (144), a first bolt and a second bolt (145), the surface of the pre-pressing block is provided with a plurality of longitudinally extending waist-shaped holes (1431), the upper bending knife is provided with a locking hole, the different positions of the waist-shaped holes are aligned with the locking hole and locked by the first bolt, so as to realize the fixation of the pre-pressing block and the adjustment of the installation height, and the connecting plate is fixedly installed on the surface of the upper bending knife, and the second bolt penetrates through the longitudinal holes of the connecting plate and the pre-pressing block to fix the pre-pressing plate on the connecting plate in the longitudinal direction.

3. The soft pack cell tab Z-bender machine of claim 1, wherein: The lower end surface of the pre-pressing block and the side close to the upper bending knife form a pressing step (1432), the height of the pressing step is 0.08-0.12 mm, and the width is 0.4-0.8 mm.

4. The Z-bender machine for soft-pack battery tab according to claim 1 or 3, characterized in that: The lower end of the base is fixedly installed with a supporting block (17), and the supporting block is located directly below the pre-pressing block; The upper end surface of the supporting block and the side close to the lower bending knife form a supporting step (171), the height of the supporting step is 0.4-0.6 mm, and the width is 1.0-1.4 mm.

5. The soft pack cell tab Z-bender machine of claim 1, wherein: The pressing connecting assembly comprises a horizontal plate (162) and two side plates (163), the middle of the horizontal plate has a U-shaped groove for the push rod of the upper bending driving cylinder to penetrate through, the two pressing fingers are respectively located on the two sides of the push rod of the upper bending driving cylinder and the upper ends are fixed to the horizontal plate, the two ends of the horizontal plate are respectively fixed to the side plates, and the two side plates are respectively fixed to the two sides of the base.

6. The soft pack cell tab Z-bender machine of claim 1, wherein: The upper part of the surface of the lower bending knife forms a step groove (1521), the depth of the step groove is 0.25-0.30mm and the height is 8-12mm.

7. The Z-bender machine for soft-pack battery tab according to claim 1, wherein: The bending device further comprises a bending translation driving mechanism (18) for driving the bending support to translate, the bending translation driving mechanism is a servo motor driving screw nut transmission mechanism, and the nut is fixed at the bottom of the bending support.

8. The soft pack cell tab Z-bender machine of claim 4, wherein: The bending machine further comprises a rack (2), a plurality of positioning mechanisms (3) arranged on the rack and a plurality of visual detection mechanisms (4) arranged on the rack, the number of the positioning mechanisms, the visual detection mechanisms and the bending device is the same; the positioning mechanism (3) comprises a pneumatic clamping jaw (31), a clamping jaw seat (32) and a positioning lifting driving air cylinder (33) capable of driving the clamping jaw seat to lift, the pneumatic clamping jaw is installed on the clamping jaw seat, the clamping jaw seat is installed on the lower end of the positioning lifting driving air cylinder, and the battery cell (10) is positioned by the pneumatic clamping jaw from both sides; The visual detection mechanism is a visual detection camera, and a light source (41) required by the visual detection mechanism is installed on the supporting block.

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