Feeding device and battery production equipment

Abstract

The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a feeding device and battery production equipment. The driving mechanism and the punching mechanism are sequentially arranged on one side of the unwinding mechanism, the driving mechanism is used for conveying the end of the foil to the position below the punching mechanism, and the punching mechanism is used for forming a notch in the surface of the foil; the tension swing rod mechanism is arranged between the unwinding mechanism and the driving mechanism and used for adjusting the tension of the foil so that the foil can be broken at the notch. According to the utility model, the feeding structure is optimized, so that the problem of automatically completing batch feeding can be solved, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a feeding device and a battery production equipment. Background Art

[0002] As a new type of secondary battery, lithium-ion batteries have the advantages of large energy density and power density, high working voltage, light weight, small size, long cycle life, good safety, environmental friendliness, etc., and have broad application prospects in portable electrical appliances, electric tools, large-scale energy storage, electric vehicle power sources, etc.

[0003] Among them, the composite current collector includes a conductive layer and a polymer layer. After the composite current collector is directly welded to the tab, the tab is likely to fall off. Therefore, the scheme of using the welding structure of the tab, the composite current collector, and the metal current collector helps to improve the welding effect and safety, and it is necessary to pad the metal current collector at the bottom of the composite current collector.

[0004] In the process of implementing the present utility model, the inventor found that there are at least the following problems in the prior art: the existing device cannot automatically complete the batch feeding of the metal current collector, which is not conducive to batch padding the metal current collector at the bottom of the composite current collector and welding, resulting in low production efficiency. Summary of the Utility Model

[0005] One of the purposes of the present utility model is: aiming at the deficiencies of the prior art, a feeding device is provided, which can solve the problem of automatically completing batch feeding by optimizing the feeding structure, and helps to improve production efficiency.

[0006] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A feeding device includes an unwinding mechanism for unwinding a foil; a driving mechanism and a punching mechanism are sequentially arranged on one side of the unwinding mechanism. The driving mechanism is used to convey the end of the foil to the lower part of the punching mechanism, and the punching mechanism is used to form a notch on the surface of the foil; a tension swing rod mechanism is arranged between the unwinding mechanism and the driving mechanism to adjust the tension of the foil so that the foil breaks at the notch.

[0008] Preferably, a guiding groove is arranged below the punching mechanism, and the guiding groove is arranged along the length direction of the foil.

[0009] Preferably, the end of the unwinding mechanism is connected with a motor or a damper, so that the unwinding mechanism moves with the driving mechanism for feeding and unwinding.

[0010] Preferably, a sensor is provided between the driving mechanism and the punching mechanism. The sensor is used to detect the fracture position of the foil material, and the sensor is an optical fiber sensor or a color mark sensor.

[0011] Preferably, a lifting unit is connected to the end of the tension swing rod mechanism. The lifting unit is used to drive the tension swing rod mechanism to move up and down.

[0012] Preferably, the driving mechanism includes a driving roller and a passing roller arranged in parallel. A gap for the foil material to pass through is formed between the driving roller and the passing roller. The driving roller is used to convey the end of the foil material to the lower part of the punching mechanism.

[0013] Preferably, the feeding device further includes a machine table. A fixing plate is arranged on the machine table. The unwinding mechanism, the driving mechanism and the punching mechanism are respectively and spacedly installed on the side part of the fixing plate.

[0014] Preferably, the feeding device further includes a screw rod slide rail. A slider is arranged on the top of the screw rod slide rail. The top of the slider is fixedly connected to the machine table.

[0015] Preferably, the notch is arranged along the width direction of the foil material, and the notch is dot-shaped, linear, dot-linear or serrated.

[0016] The second object of the present invention is to provide a battery production device, including a welding device for welding the foil material to the bottom of the composite current collector, and the cut of the foil material padded at the bottom is a non-flush structure; the feeding device as described above is used to batch-feed the foil material to the bottom of the composite current collector.

[0017] Driven by the driving mechanism, the end of the foil material is conveyed to the lower part of the punching mechanism. A notch is punched on the surface of the foil material by the punching mechanism. Then the driving mechanism continues to rotate forward, and the foil material is sent to the welding place. After welding is completed, the tension swing rod mechanism controls the tension of the foil material and applies a pulling force to the foil material, so that the foil material breaks at the notch. After the foil material breaks, the driving mechanism rotates reversely to collect the material. Finally, the driving mechanism drives the feeding, and then the punching mechanism and the tension swing rod mechanism repeat the actions cyclically to complete the batch feeding of the foil material. By adding the punching mechanism and the tension swing rod mechanism, the present invention solves the problem of batch feeding of the foil material, and further realizes batch-padding the foil material at the bottom of the composite current collector and welding, which helps to improve the production efficiency of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of the exemplary embodiments of the present invention will be described below with reference to the drawings.

[0019] Figure 1 It is a schematic structural diagram of Embodiment 1 in the present invention.

[0020] Figure 2 This is a schematic structural diagram of the second implementation mode in the present utility model.

[0021] Figure 3 This is a schematic diagram of the feeding process of the present utility model.

[0022] Figure 4 This is a schematic diagram of various notch types on the foil material of the present utility model.

[0023] Among them, the reference numerals are explained as follows:

[0024] 1 - Unwinding mechanism;

[0025] 2 - Driving mechanism; 21 - Driving roller; 22 - Deflection roller;

[0026] 3 - Punching mechanism;

[0027] 4 - Tension swing rod mechanism;

[0028] 5 - Guide groove;

[0029] 6 - Sensor;

[0030] 7 - Machine platform;

[0031] 8 - Lead screw slide rail;

[0032] 9 - Notch; 91 - Notch position;

[0033] 10 - Composite current collector; 101 - Foil material; 102 - Tab;

[0034] X - Length direction;

[0035] Y - Width direction. Specific implementation mode

[0036] As certain terms are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different nouns to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but use the difference in functions of components as the criterion for distinction. As mentioned throughout the specification and claims, "comprising" is an open - ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range, and those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0037] In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In a utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] The present utility model will be further described in detail below in conjunction with the accompanying drawings, but it is not a limitation to the present utility model.

[0040] Embodiment 1

[0041] The existing device cannot automatically complete the batch feeding of the metal current collector, which is not conducive to batch placing the metal current collector at the bottom of the composite current collector and welding, resulting in low production efficiency.

[0042] The feeding device of the present utility model includes an unwinding mechanism 1 for unwinding the foil 101; a driving mechanism 2 and a punching mechanism 3, which are sequentially arranged on one side of the unwinding mechanism 1. The driving mechanism 2 is used to convey the end of the foil 101 to the lower part of the punching mechanism 3, and the punching mechanism 3 is used to form a notch 9 on the surface of the foil 101; a tension pendulum mechanism 4 is arranged between the unwinding mechanism 1 and the driving mechanism 2, which is used to adjust the tension of the foil 101 so that the foil 101 breaks at the notch 91. In the present utility model, by the forward rotation of the driving mechanism 2, the end of the foil 101 is conveyed to the lower part of the punching mechanism 3, and the punching mechanism 3 punches a notch 9 on the surface of the foil 101. Then, the driving mechanism 2 continues to rotate forward. After the foil 101 is sent to a preset position for positioning, the tension pendulum mechanism 4 controls the tension of the foil 101 by moving up and down, applies a pulling force to the foil 101, so that the foil 101 breaks at the notch 91. After the foil 101 breaks, the driving mechanism 2 reversely winds up the material. Finally, the driving mechanism 2 rotates forward to feed the material, and then the punching mechanism 3 and the tension pendulum mechanism 4 repeat the actions cyclically to complete the batch feeding of the foil, that is, by adding the punching mechanism 3 and the tension pendulum mechanism 4, the problem of batch feeding of the foil 101 is solved, and further, the foil 101 can be batch placed at the bottom of the composite current collector 10 and welded, which helps to improve the production efficiency of the battery.

[0043] It should be noted that: the foil material 101 is a conductive metal foil material, such as copper foil, aluminum foil, nickel foil, etc. The thickness of the foil material 101 is 4 - 20um, the width of the foil material 101 is 5 - 40mm, and the initial state of the foil material 101 is a coiled incoming material. The diameter of the coiled foil is less than 400mm. At this time, the coiled foil cannot be directly placed at the bottom of the composite current collector 10 for welding. The uncoiling mechanism 1 can fix the coiled foil and unwind it along with the movement of the driving mechanism 2. The tension swing rod mechanism 4 applies a tensile force ≤ 10N to the foil material 101, but the present invention is not limited thereto and can be adjusted according to actual production requirements. The tension swing rod mechanism 4 includes a tension swing rod and a tension detector. The tension swing rod adopts a conveying roller structure and cooperates with the lifting unit to realize the up and down movement of the tension swing rod, so as to adjust the tension of the foil material 101 and maintain stable unwinding. The tension detector is used to measure the tension value of the coil material during the tension control of the foil material 101, and the tension is detected by a differential transformer. The punching mechanism 3 can punch the foil material 101 to form a notch 9, and the notch 9 is broken after being subjected to a preset tensile force. The punching mechanism 3 includes a telescopic robotic arm and a punching knife arranged at the end of the telescopic robotic arm. The shape and arrangement of the punching knife are the same as those of the notch 9. Among them, the forward rotation direction of the driving mechanism 2 is the same as the feeding direction of the foil material 101; the reverse rotation direction of the driving mechanism 2 is the same as the rewinding direction of the foil material 101.

[0044] In addition, the feeding device of the present invention can be applied to metal current collectors and can also be applied to the composite current collector 10. In some embodiments, the width of the feeding foil can be adjusted according to requirements; it can also be applied to the structure with the tab in the middle.

[0045] In the feeding device according to the present invention, a guiding groove 5 is provided below the punching mechanism 3, and the guiding groove 5 is arranged along the length direction X of the foil material 101. Specifically, the guiding groove 5 restricts the position of the foil material 101 to prevent the foil material 101 from deviating during the feeding process. The guiding groove 5 extends along the length direction X of the foil material 101. The cross-sectional shape of the guiding groove 5 includes, but is not limited to, a concave shape, a U shape, and can also be other shapes as long as it can restrict the position of the foil material 101.

[0046] In the feeding device according to the present invention, the end of the uncoiling mechanism 1 is connected with a motor or a damper, so that the uncoiling mechanism 1 moves along with the driving mechanism 2 for feeding and unwinding. Specifically, the uncoiling mechanism 1 can be controlled by the motor to rotate forward or reverse to realize unwinding or rewinding, or the uncoiling mechanism 1 and the driving mechanism 2 can be controlled to rotate synchronously or asynchronously, which is not limited here.

[0047] In the feeding device according to the present utility model, a sensor 6 is provided between the driving mechanism 2 and the punching mechanism 3. The sensor 6 is used to detect the fracture position of the foil 101, and the sensor 6 is an optical fiber sensor or a color mark sensor. Specifically, the sensor 6 can be linked with the servo motor of the driving mechanism 2 to detect the fracture position of the foil 101 after it is pulled off. When the foil 101 is retracted, it monitors whether the foil 101 is retracted, and can also monitor the length of the foil 101 during feeding, which helps to improve the length consistency of each foil 101.

[0048] In the feeding device according to the present utility model, a lifting unit is connected to the end of the tension swing rod mechanism 4. The lifting unit is used to drive the tension swing rod mechanism 4 to move up and down. Specifically, the lifting unit includes, but is not limited to, a lift and a telescopic arm, and can also be other lifting units, which are not limited here, as long as it can drive the tension swing rod mechanism 4 to move along a preset direction and achieve the adjustment of the tension of the foil 101.

[0049] In the feeding device according to the present utility model, the notch 9 is arranged along the width direction Y of the foil 101. The notch 9 includes, but is not limited to, dot-shaped, linear, dot-linear, serrated, etc., and can also be other regular or irregular shapes, or other arrangements, which are not limited here. Refer to Figure 4 As shown, there are various types of notches 9. Generally, one of them is selected for application, and different types are within the scope of protection here.

[0050] The working principle of the present utility model is:

[0051] According to the set length, the present utility model rotates the driving mechanism 2 forward to convey the end of the foil 101 to the lower part of the punching mechanism 3. The punching mechanism 3 punches a notch 9 on the surface of the foil 101. Then the driving mechanism 2 continues to rotate forward to convey the foil 101 to the welding place. After welding is completed, the tension swing rod mechanism 4 controls the tension of the foil 101 by moving up and down, applying a pulling force to the foil 101, so that the foil 101 breaks at the notch 91. After the foil 101 breaks, the driving mechanism 2 rotates in reverse to collect the material. Finally, according to the set length, the driving mechanism 2 rotates forward to feed the material, and then the punching mechanism 3 and the tension swing rod mechanism 4 repeat the actions cyclically to complete the batch feeding of the foil, solve the problem of batch feeding of the foil 101, and further realize batch padding of the foil 101 at the bottom of the composite current collector 10 and welding, which helps to improve the production efficiency of the battery.

[0052] Embodiment 2

[0053] Different from the first embodiment: The feeding device of this embodiment further includes a machine table 7. A fixing plate is provided on the machine table 7. The unwinding mechanism 1, the driving mechanism 2, and the punching mechanism 3 are respectively and spacedly installed on the side of the fixing plate. The feeding device further includes a lead screw slide rail 8. A slider is provided at the top of the lead screw slide rail 8, and the top of the slider is fixedly connected to the machine table 7. The tension swing rod mechanism 4 of this embodiment functions to control the tension, and the machine table 7 cooperates with the lead screw slide rail 8. The machine table 7 moves relative to the lead screw slide rail 8, which can also cause the foil 101 to break at the notch 91, realizing the breaking of the foil 101. Specifically, the fixing plate is vertically installed on the machine table 7, and the side of the fixing plate has an installation plane. The unwinding mechanism 1, the driving mechanism 2, and the punching mechanism 3 on the machine table 7 can be regarded as a whole. The machine table 7 moves with the slider of the lead screw slide rail 8, that is, the foil 101 after being punched by the punching mechanism 3 can also move with the lead screw slide rail 8. Among them, a lead screw and a motor are provided in the lead screw slide rail 8. The bottom of the slider is threadedly connected to the lead screw. When the motor drives the lead screw to rotate, the rotational motion of the lead screw can be converted into the linear motion of the slider. When the unwinding mechanism 1, the driving mechanism 2, and the punching mechanism 3 on the machine table 7 slide backward as a whole, a pulling force is applied to the foil 101 after being punched to form a notch 9, and the foil 101 can also be broken at the notch 91.

[0054] Other structures are the same as those in the first embodiment and will not be elaborated here.

[0055] The third embodiment

[0056] Different from the first embodiment: The driving mechanism 2 of this embodiment includes a driving roller 21 and a guide roller 22 arranged in parallel. A gap for the foil 101 to pass through is formed between the driving roller 21 and the guide roller 22. The driving roller 21 is used to convey the end of the foil 101 to the lower part of the punching mechanism 3. Specifically, the driving roller 21 can be driven to rotate by a servo motor, thereby driving the foil 101 to feed in a preset direction. The driving roller 21, through the cooperation with the guide roller 22, can convey the end of the foil 101 to the lower part of the punching mechanism 3, and the punching mechanism 3 punches the foil 101.

[0057] Other structures are the same as those in the first embodiment and will not be elaborated here.

[0058] Battery production equipment

[0059] The present utility model includes the feeding devices of the first to third embodiments.

[0060] Battery production equipment, including a welding device for welding the foil 101 to the bottom of the composite current collector 10, and the cut of the foil pad at the bottom is a non-flush structure; the feeding device as described above for batch-feeding the foil 101 to the bottom of the composite current collector 10.

[0061] Specifically, the welding device is positioned at a preset position, and the driving mechanism 2 feeds the foil 101 to the bottom of the composite current collector 10. The welding device welds the composite current collector 10 and the foil 101. After the welding device finishes welding, the tension swing rod mechanism 4 or the lead screw slide rail 8 moves to break the foil 101 at the notch 91. The driving mechanism 2 reversely rotates to collect the material. Finally, the driving mechanism 2 rotates forward to feed the material. Then, the punching mechanism 3 and the tension swing rod mechanism 4 cycle and repeat the actions to complete the batch feeding of the foil, that is, by adding the punching mechanism 3 and the tension swing rod mechanism 4, the problem of batch feeding of the foil 101 is solved, and further, the foil 101 is batch-padded at the bottom of the composite current collector 10 and welded, which helps to improve the production efficiency of the battery. Among them, the welding device can be arranged at the bottom of the composite current collector 10, which can be understood as being below the foil 101. The welding head of the welding device is directly opposite to the welding position of the composite current collector 10 and the foil 101. At this time, a part of the foil 101 is outside the composite current collector 10, which is convenient for connecting with the tab 102 at the top of the composite current collector 10 to realize the conduction of both sides in the thickness direction of the composite current collector 10. In addition, for the foil padded at the bottom, after being punched into a notch 9, the cut of the pulled and broken part is a non-flat structure.

[0062] According to the disclosure and teaching of the above specification, those skilled in the art of the present invention can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the above specific embodiments. Any obvious improvements, substitutions or variations made by those skilled in the art on the basis of the present invention fall within the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A feeding device, characterized in that: include: An unwinding mechanism (1) for unwinding the foil; A driving mechanism (2) and a punching mechanism (3) are sequentially arranged on one side of the unwinding mechanism (1), the driving mechanism (2) being used to transport the end of the foil material to the bottom of the punching mechanism (3), and the punching mechanism (3) being used to form a notch (9) on the surface of the foil material; A tension swing lever mechanism (4) is arranged between the unwinding mechanism (1) and the driving mechanism (2) and is used to adjust the tension of the foil material so that the foil material breaks at the notch (9).

2. A feeding device according to claim 1, characterized in that: A guide groove (5) is provided below the punching mechanism (3), and the guide groove (5) is provided along the length direction of the foil material.

3. A feeding device according to claim 2, characterized in that: The end of the unwinding mechanism (1) is connected to a motor or a damper, so that the unwinding mechanism (1) moves with the driving mechanism (2) to feed and unwind.

4. A feeding device according to claim 3, characterized in that: A sensor (6) is provided between the driving mechanism (2) and the punching mechanism (3), and the sensor (6) is used to detect the breaking position of the foil material. The sensor (6) is an optical fiber sensor or a color mark sensor.

5. A feeding device according to any one of claims 1 to 4, characterized in that: The end of the tension swing arm mechanism (4) is connected to a lifting unit, and the lifting unit is used to drive the tension swing arm mechanism (4) to move up and down.

6. A feeding device according to any one of claims 1 to 4, characterized in that: The driving mechanism (2) comprises a driving roller (21) and a passing roller (22) arranged in parallel, wherein a gap is formed between the driving roller (21) and the passing roller (22) for the foil to pass through, and the driving roller (21) is used to transport the end of the foil to the bottom of the punching mechanism (3).

7. A feeding device according to any one of claims 1 to 4, characterized in that: The feeding device also includes a machine platform (7), on which a fixed plate is provided, and the unwinding mechanism (1), the driving mechanism (2) and the punching mechanism (3) are respectively installed at intervals on the side of the fixed plate.

8. A feeding device according to claim 7, characterized in that: The feeding device also includes a screw guide rail (8), a slider is provided on the top of the screw guide rail (8), and the top of the slider is fixedly connected to the machine platform (7).

9. A feeding device according to any one of claims 1 to 4, characterized in that: The notch (9) is arranged along the width direction of the foil material, and the notch (9) is in a dot shape, a line shape, a dot-line shape, or a sawtooth shape.

10. A battery production device, characterized in that: include: A welding device is used to weld the foil to the bottom of the composite current collector (10), and the cutout of the foil padding at the bottom is a non-flush structure; The feeding device according to any one of claims 1 to 9 is used to feed foil materials in batches to the bottom of the composite current collector (10).

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