Battery cell tab bender

Abstract

The utility model belongs to lithium battery production equipment technical field discloses a kind of cell tab bender, including the support of the root of the tab of the cell of the support of the side edge of the feeding bottom support one side edge fixedly established top is supported in the bottom end;Up and down movable pressure block is located in the support directly above;Up and down movable bending block closely the outer end surface of pressure block;Groove is equipped in the outer end surface of the feeding bottom support;The groove is located in the directly below of the support;Punching block that can be horizontally telescopic is located outside the bending block, and its one end is set as sharp part;When the punching block is stretched out, the sharp part passes through the passage window and extends into the groove.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery production technology and relates to a cell tab bending machine. Background Technology

[0002] With the rapid development of the lithium-ion battery industry, the requirements for the automation level, stability, and consistency of lithium battery production equipment are becoming increasingly stringent in order to fully guarantee the safety, stability, and other performance aspects of lithium-ion batteries. However, due to equipment limitations, the problem of cell consistency has not yet been resolved.

[0003] During the assembly of pouch batteries, it is crucial to ensure sufficient contact between the series and parallel cell tabs. Due to the thickness of the battery itself, the tabs need to be bent and shaped to guarantee a tight connection during battery assembly. Currently, there is no convenient and quick tab bending mechanism for shaping the cell tabs. Relying on manual bending during assembly severely impacts production efficiency and cannot guarantee product consistency. In particular, there is a lack of effective bending devices for the Z-shaped tabs of pouch batteries. The Z-shaped tab is illustrated in patent CN202434617U, entitled "A Z-shaped Coated Aluminum Tab". Utility Model Content

[0004] To overcome the shortcomings in the prior art, this utility model provides a cell tab bending machine. The purpose is to address the problems of poor consistency, easy cracking, easy warping, and easy detachment of the tabs caused by manual bending of the Z-shaped tabs of soft-pack batteries. A special bending device is designed to change the shape of the tabs, effectively improve the product qualification rate and production efficiency, and ensure production stability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a battery cell tab bending machine, comprising a feeding base for flattening the battery cell; a support portion fixed to one edge of the feeding base supporting the lower end of the root of the battery cell tab; a vertically movable clamping block located directly above the support portion; a vertically movable bending block closely abutting the outer end face of the clamping block; a groove provided on the outer end face of the feeding base; the groove located directly below the support portion, its width being greater than the width of the tab; a left-right through channel window provided at the lower part of the bending block; a horizontally retractable stamping block located outside the bending block, one end of which is provided as a sharp part; when the stamping block extends, the sharp part passes through the channel window and extends into the groove; a gap is provided between the lower surface of the sharp part and the bottom surface of the groove; the gap is not less than the thickness of the tab.

[0006] As a further optimization, a clamping mechanism is also included above the support; the clamping mechanism includes a bracket assembly, a clamping cylinder is fixedly connected to the bracket assembly, and the lower end of its telescopic rod is fixedly connected to the clamping block for driving the clamping block to move up and down.

[0007] As a further optimization, a bending mechanism is also included; the bending mechanism includes a right-angle bending cylinder fixed to the support assembly, and the lower end of the telescopic rod of the right-angle bending cylinder is connected to the bending block for driving the bending block to move up and down.

[0008] As a further optimization, a forming mechanism is also included, which includes a horizontally fixed Z-shaped bending cylinder; the end of the telescopic rod of the Z-shaped bending cylinder is fixed to the stamping block, and is used to drive the stamping block to extend and retract horizontally.

[0009] As a further optimization, a control mechanism is also included; the control mechanism is electrically connected to the clamping cylinder, the right-angle bending cylinder and the Z-shaped bending cylinder, and is used to control the extension and retraction of the telescopic rods of the three cylinders.

[0010] As a further optimization, the clamping mechanism, the bending mechanism, and the forming mechanism are all equipped with magnetic proximity switches. All of the magnetic proximity switches are connected to the control mechanism circuit and are used to send a positioning signal to the control mechanism when the clamping block, the bending block, and the stamping block move to the predetermined position.

[0011] As a further optimization, the control mechanism is equipped with a program control unit, which is used to sequentially control the extension rods of the clamping cylinder, the right-angle bending cylinder and the Z-type bending cylinder to extend according to the position signal issued by the magnetic proximity switch, and sequentially control the extension rods of the Z-type bending cylinder, the right-angle bending cylinder and the clamping cylinder to retract and reset.

[0012] Compared with the prior art, the beneficial effects of this utility model are: this utility model can bend and form Z-shaped tabs of battery cells, which is simple to operate, improves work efficiency, is reliable in operation, and has high forming quality. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the planar structure of an embodiment of the present utility model;

[0015] Figure 3 This is a partial cross-sectional structural diagram of the tab bending process in an embodiment of this utility model.

[0016] The correspondence between the technical features in the figure and the reference numerals is as follows: 1. Feeding base; 102. Groove; 103. Support part; 2. Pressing mechanism; 3. Bending mechanism; 4. Forming mechanism; 5. Control mechanism; 6. Pressing cylinder; 7. Pressing block; 8. Pressing magnetic proximity switch; 9. Right angle bending cylinder; 10. Bending block; 10. Channel window; 11. Bending magnetic proximity switch; 12. Z-type bending cylinder; 13. Forming magnetic proximity switch; 14. Stamping block; 15. Air switch; 16. Intermediate relay; 17. PLC controller; 18. Solenoid valve; 19. Control button; 20. Battery cell; 21. Electrode. Detailed Implementation

[0017] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model, and are not intended to limit the protection scope of this utility model.

[0018] Example: Please refer to Figure 1-3 This utility model provides the following technical solution: a battery cell tab bending machine, comprising a feeding base 1, a pressing mechanism 2, a bending mechanism 3, a forming mechanism 4, and a control mechanism 5.

[0019] This invention features a mechanical structure with electrical control, resulting in a simple overall structure that is easy to use and operates stably and reliably. The feeding tray uses an aluminum alloy base plate, with bakelite blocks fixed to the upper surface as limit strips to secure the product, ensuring that the battery cell 20 and its tabs 21 do not shift during bending, thus protecting the battery cell 20 and improving the product qualification rate.

[0020] The present invention designs a clamping mechanism 2 consisting of a clamping cylinder 6, a clamping block 7, and a clamping magnetic proximity switch 8; a bending mechanism 3 consisting of a right-angle bending cylinder 9, a bending magnetic proximity switch 11, and a bending block 10; and a forming mechanism 4 consisting of a Z-shaped bending cylinder 12, a forming magnetic proximity switch 13, and a stamping block 14. The clamping cylinder 6, right-angle bending cylinder 9, and Z-shaped bending cylinder 12 are all pneumatic square telescopic cylinders with a telescopic stroke of 35mm and a thrust of 500N under 0.5Mpa air pressure. Two magnetic proximity switches are fixed to the sides of the cylinders at both ends of the cylinder stroke, serving as the cylinder's original position signal and cylinder's position signal, respectively. The clamping block 7, bending block 10, and stamping block 14 are all made of 304 stainless steel.

[0021] The control mechanism 5 of this invention includes a distribution box, an air switch 15, a PLC controller 17, solenoid valves 18, intermediate relays 16, control buttons 19, and a set of PLC programs. The distribution box is 200mm long, 150mm wide, and 300mm high, and is made of galvanized sheet metal. The air switch 15 is a 2P10A circuit switch. The PLC is a Mitsubishi FX1s-14 with 8 input contacts and 6 output contacts to meet the requirements of magnetic switch signal input and cylinder signal output. There are 3 solenoid valves 18, which are three-position five-way solenoid valves to control the extension and retraction of the clamping cylinder 6, the right-angle bending cylinder 9, and the Z-shaped bending cylinder 12, respectively. The intermediate relay 16 serves as a signal transfer between the PLC output and the input of the cylinder solenoid valves 18. The control buttons 19 include a start button and a stop button to control the start and stop of the equipment, respectively. The PLC program is imported into the PLC controller 17. When the start button is clicked, the equipment runs automatically according to the PLC program logic.

[0022] This invention designs a cell tab bending machine, specifically a shaping and assembly equipment for the tabs 21 of a pouch cell 20. This equipment solves the critical process problem of Z-shaped bending of the positive and negative tabs 21 during the assembly of the pouch cell 20 due to its special structure, thereby changing its shape to complete the assembly. This improves product qualification rate and production efficiency, and has significant practical production implications.

[0023] Based on this, a battery cell tab bending machine of the present invention includes at least a loading base 1 for laying the battery cell 20 flat; a support portion 103 fixed to one side edge of the loading base 1 supports the lower end of the root of the tab 21 of the battery cell 20; a vertically movable clamping block 7 is located directly above the support portion 103; a vertically movable bending block 10 is in close contact with the outer end face of the clamping block 7; a groove 102 is provided on the outer end face of the loading base 1; the groove 102 is located directly below the support portion 103, and its width is... The width of the tab 21 is greater than the width of the groove 102, so that the groove 102 can accommodate the entire tab 21. The lower part of the bending block 10 is provided with a channel window 101 that runs horizontally through the left and right sides. A horizontally retractable stamping block 14 is located outside the bending block 10, and one end of it is provided as a sharp part. When the stamping block 14 is extended, the sharp part passes through the channel window 101 and extends into the groove 102. A gap is provided between the lower surface of the sharp part and the bottom surface of the groove 102. The gap is not less than the thickness of the tab 21. This gap is to accommodate the bent tab 21.

[0024] In operation, the battery cell 20 to be processed is placed in the preset battery cell 20 placement position on the loading base 1. Then, the equipment starts running, and the clamping block 7 presses down and cooperates with the support part 103 to clamp and fix the base of the electrode 21. Then, the bending block 10 presses down to punch the electrode 21 into a right angle shape. Next, the stamping block 14 extends and cooperates with the groove 102 to punch the right angle electrode 21 into a Z shape. Finally, the stamping block 14, bending block 10 and clamping block 7 retract in sequence, successfully resetting, and the product is removed from the loading base 1, completing the processing.

[0025] An exemplary manner in which the pressing block 7 moves up and down is that the pressing mechanism 2 is disposed above the support part 103 and includes a bracket assembly, the pressing cylinder 6 is fixedly connected to the bracket assembly, and the lower end of its telescopic rod is fixedly connected to the pressing block, which is used to drive the pressing block 7 to move up and down.

[0026] An exemplary manner in which the bending block 10 moves up and down is that the bending mechanism 3 includes a right-angle bending cylinder 9 fixed to the bracket assembly, and the lower end of the telescopic rod of the right-angle bending cylinder 9 is connected to the bending block 10 to drive the bending block 10 to move up and down.

[0027] An exemplary manner in which the bending block 10 moves up and down is that the forming mechanism 4 includes a horizontally fixed Z-shaped bending cylinder 12; the end of the telescopic rod of the Z-shaped bending cylinder 12 is fixed to the stamping block 14, which is used to drive the stamping block 14 to extend and retract horizontally.

[0028] Preferably, the control mechanism 5 is electrically connected to the clamping cylinder 6, the right-angle bending cylinder 9, and the Z-shaped bending cylinder 12, and is used to control the extension and retraction of the telescopic rods of the three cylinders. The control mechanism 5 has a control button 19 to automatically control the three cylinders.

[0029] Preferably, to detect the extension and retraction of the three cylinders, the clamping mechanism 2, the bending mechanism 3, and the forming mechanism 4 are all equipped with magnetic proximity switches. All the magnetic proximity switches are electrically connected to the control mechanism 5 and are used to send a positioning signal to the control mechanism 5 when the clamping block 7, the bending block 10, and the stamping block 14 move to the predetermined position.

[0030] To simplify operation and increase automation, the operation of the three cylinders is controlled by a program. The control mechanism 5 is equipped with a program control unit, which is used to sequentially control the extension rods of the clamping cylinder 6, the right-angle bending cylinder 9, and the Z-shaped bending cylinder 12 to extend according to the positioning signal issued by the magnetic proximity switch, and sequentially control the extension rods of the Z-shaped bending cylinder 12, the right-angle bending cylinder 9, and the clamping cylinder 6 to retract and reset.

[0031] Based on the aforementioned control mechanism 5, a more preferred specific operating method is as follows: Turn on the air switch 15 to power on the equipment; place the battery cell 20 product to be processed into the loading tray 1; click the start / stop control button 19 to start the equipment; the PLC controller 17 outputs an action signal for the clamping cylinder 6, which is transmitted to the intermediate relay 16; the normally open contact of the intermediate relay 16 closes, controlling the solenoid valve 18 to open; the clamping cylinder 6 actuates; the clamping block 7 presses down to clamp the product; the clamping magnetic proximity switch 8 senses that the clamping cylinder 6 has extended to its full position; the PLC controller 17 outputs an action signal for the right-angle bending cylinder 9, which is transmitted to the intermediate relay 16. Electrical appliance 16, intermediate relay 16, normally open contact closes to control solenoid valve 18 to open, right-angle bending cylinder 9 actuates, bending block 10 presses down, stamping product tab 21 into a right-angle shape; PLC controller 17 outputs Z-type bending cylinder 12 actuation signal to intermediate relay 16, intermediate relay 16 normally open contact closes to control solenoid valve 18 to open, Z-type bending cylinder 12 actuates, stamping block 14 extends, stamping product right-angle tab 21 into a Z shape; Z-type bending cylinder 12, right-angle bending cylinder 9, and pressing cylinder 6 successfully reset; product is removed from loading base 1, processing completed.

[0032] The advantage of this embodiment is that it can bend and form the Z-shaped tabs 21 of the battery cell 20, which is simple to operate, improves work efficiency, is reliable, and has high forming quality.

[0033] The parts of this utility model not described in detail are prior art; for those skilled in the art, the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A battery cell tab bending machine, comprising a feeding base (1) for laying the battery cell (20) flat; characterized in that: The support part (103) fixed on one side edge of the feeding base (1) is supported at the lower end of the root of the electrode (21) of the battery cell (20); the pressing block (7) that can move up and down is located directly above the support part (103); the bending block (10) that can move up and down is close to the outer end face of the pressing block (7); A groove (102) is provided on the outer end face of the feeding base (1); the groove (102) is located directly below the support part (103), and its width is greater than the width of the electrode (21); the lower part of the bending block (10) is provided with a channel window (101) that runs through the left and right; a horizontally retractable stamping block (14) is located outside the bending block (10), and one end of it is provided as a sharp part; when the stamping block (14) extends out, the sharp part passes through the channel window (101) and extends into the groove (102); there is a gap between the lower surface of the sharp part and the bottom surface of the groove (102); the gap is not less than the thickness of the electrode (21).

2. The battery cell tab bending machine according to claim 1, characterized in that: It also includes a pressing mechanism (2) disposed above the support (103); the pressing mechanism (2) includes a bracket assembly, a pressing cylinder (6) is fixedly connected to the bracket assembly, and the lower end of its telescopic rod is fixedly connected to the pressing block (7) for driving the pressing block (7) to move up and down.

3. The battery cell tab bending machine according to claim 2, characterized in that: It also includes a bending mechanism (3); the bending mechanism (3) includes a right-angle bending cylinder (9) fixed to the bracket assembly, the lower end of the telescopic rod of the right-angle bending cylinder (9) is connected to the bending block (10) for driving the bending block (10) to move up and down.

4. The battery cell tab bending machine according to claim 3, characterized in that: It also includes a forming mechanism (4), which includes a horizontally fixed Z-shaped bending cylinder (12); the end of the telescopic rod of the Z-shaped bending cylinder (12) is fixed to the stamping block (14) for driving the stamping block (14) to extend and retract horizontally.

5. The battery cell tab bending machine according to claim 4, characterized in that: It also includes a control mechanism (5); the control mechanism (5) is electrically connected to the pressing cylinder (6), the right-angle bending cylinder (9) and the Z-shaped bending cylinder (12), and is used to control the extension and retraction of the telescopic rods of the three cylinders.

6. The battery cell tab bending machine according to claim 5, characterized in that: The pressing mechanism (2), the bending mechanism (3) and the forming mechanism (4) are all equipped with magnetic proximity switches. All the magnetic proximity switches are connected to the control mechanism (5) in a circuit. They are used to send a positioning signal to the control mechanism (5) after the pressing block (7), the bending block (10) and the stamping block (14) move to the predetermined position.

7. The battery cell tab bending machine according to claim 6, characterized in that: The control mechanism (5) is equipped with a program control unit, which is used to sequentially control the extension rods of the clamping cylinder (6), the right-angle bending cylinder (9) and the Z-type bending cylinder (12) to extend according to the position signal sent by the magnetic proximity switch, and sequentially control the extension rods of the Z-type bending cylinder (12), the right-angle bending cylinder (9) and the clamping cylinder (6) to retract and reset.

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