Flattening, dust collecting, anti-blocking and shaping device for full-tab roll core of cylindrical battery

Abstract

The utility model discloses a cylindrical battery full-tab roll core kneading, dust collection, anti-blocking and shaping device which comprises a plurality of rotary positioning needles and dust removal kneading wheels, the dust removal kneading wheels rotate by taking the rotary positioning needles as centers, and each dust removal kneading wheel is provided with a guide shaping mechanism; the device further comprises a rubbing wheel fixing base, and the dust removal rubbing wheel is connected with the rubbing wheel fixing base. According to the utility model, the dedusting rubbing wheel applies pressure to the side wall and the end face of the roll core to realize full-contact limiting on the outer side of the roll core, then the end face of the roll core is rubbed through the rubbing head, and the roll core cannot be turned outwards due to limiting, so that short circuit of a battery cell caused by outward turning of the roll core is avoided, and the reliability of the battery cell is improved; meanwhile, the positioning needle prevents the current collector from collapsing into the center of the roll core in the kneading process, and the manufacturing requirements of subsequent procedures are met.

Description

Technical Field

[0001] This utility model relates to the field of power / energy storage lithium-ion battery processing technology, and in particular to a device for flattening, dust removal, anti-clogging, and shaping cylindrical battery all-pole cores. Background Technology

[0002] With the development of power battery technology, the energy density, power density, cycle life, thermal effect, internal resistance and fast charge and discharge capabilities of batteries have been improved. The all-tab structure is different from the traditional single or few tabs. The all-tab cell has small tabs evenly distributed on the positive and negative plates. These tabs are directly connected to the current collector, which greatly increases the internal conductive area of ​​the cell and helps to improve the power output capability of the battery.

[0003] Currently, in the kneading process:

[0004] 1. The flattening process mainly relies on the contact pressure between the flattening head and the current collector of the core for flattening. The outer tabs of the core are not completely limited and guided by the flattening head. During flattening, the tabs are squeezed by the rotation of the flattening head, and the outer tabs cannot be effectively limited. It is unavoidable that the outer tabs of the core will turn outward. After the core is flattened and installed into a battery cell, the outwardly turned tabs will contact the battery, causing a short circuit and creating a safety hazard.

[0005] 2: During the flattening process of the core center, the current collector may collapse and block the center hole, affecting subsequent processing.

[0006] 3: The core rolling process involves contact friction between two different materials, which can easily generate iron filings and dust during production. This can cause short circuits in the core, leading to a decrease in product yield and posing safety hazards.

[0007] In summary, the existing technology has technical problems in the flattening process, such as the outer edge of the core turning upside down, the center hole collapsing, and dust residue that can easily lead to short circuits in the core.

[0008] To address the aforementioned problems, this utility model is proposed. Utility Model Content

[0009] The purpose of this invention is to provide a device for flattening, dust removal, anti-clogging, and shaping the core of a cylindrical battery with all tabs.

[0010] The objective of this utility model can be achieved through the following technical solutions:

[0011] A device for flattening, dust removal, anti-clogging, and shaping cylindrical battery all-pole ear cores includes several rotating positioning pins and dust-removing flattening wheels. The multiple dust-removing flattening wheels rotate around the rotating positioning pins, and the dust-removing flattening wheels have their own guiding and shaping mechanisms.

[0012] Furthermore, it also includes a kneading wheel fixing base, wherein the dust-removing kneading wheel is connected to the kneading wheel fixing base.

[0013] Preferably, it also includes a turntable, which supports multiple kneading wheel fixing bases and rotating positioning pins, the multiple kneading wheel fixing bases being evenly arranged along the circumference of the turntable.

[0014] The rotating positioning pin is fixed coaxially with the turntable.

[0015] Furthermore, the dust-removing flattening wheel includes a flattening head, and the flattening head has dust suction holes around its perimeter.

[0016] Preferably, the flattened head has a built-in guiding and shaping system.

[0017] Furthermore, the dust-removing kneading wheel also includes a rotating shaft and an extrusion section. The head of the kneading head is conical. The kneading head is connected to the rotating shaft via the extrusion section. The rotating shaft is fixedly connected to the kneading wheel base. The rotating shaft, extrusion section, and kneading head are coaxially arranged. The rotating shaft drives the extrusion section and kneading head to rotate.

[0018] Preferably, it also includes a rotary positioning pin bearing, which is mounted on the turntable, and the rotary positioning pin is mounted on the rotary positioning pin bearing.

[0019] Furthermore, it also includes a flattening wheel fixed bearing, which is installed on the flattening wheel fixed base, and a dust removal flattening wheel is installed on the flattening wheel fixed bearing.

[0020] Furthermore, the dust-removing kneading wheel has an internal cavity structure, the dust suction holes of the kneading wheel are connected to the cavity structure, and the cavity structure is connected to a vacuum suction connector.

[0021] Preferably, the turntable is driven to rotate by a motor.

[0022] Beneficial technical effects:

[0023] The dust-removing and flattening rollers of this invention apply pressure to the side walls and end faces of the core, achieving full-contact limiting of the outer side of the core. Then, the flattening head flattens the end face of the core. Because the core is limited, it cannot be turned outward, thus avoiding short circuits caused by the core turning outward and improving the reliability of the core. At the same time, the positioning pins prevent the current collector from collapsing into the center of the core during the flattening process, ensuring the manufacturing requirements of subsequent processes. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2This is an exploded view of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure with a core in this utility model.

[0028] Figure 4 This is a schematic diagram of the default parts of this utility model.

[0029] Figure 5 This is a schematic diagram of the dust removal and smoothing wheel structure of this utility model.

[0030] In the diagram: 1. Turntable; 2. Dust-removing and flattening wheel; 3. Rotary positioning pin; 4. Core; 5. Dust suction hole of flattening wheel; 6. Guide and shaping mechanism; 7. Rotary positioning pin bearing; 8. Flattening wheel fixing bearing; 9. Flattening wheel fixing base; 10. Vacuum suction connector. Detailed Implementation

[0031] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0032] Reference Figures 1-5 As shown, a device for flattening, dust removal, anti-clogging, and shaping cylindrical battery all-pole ear cores includes a turntable 1, a flattening wheel fixing base 9, a rotating positioning pin 3, and a dust-removing flattening wheel 2. The dust-removing flattening wheel 2 has a built-in guiding and shaping mechanism 6. The turntable 1 carries multiple flattening wheel fixing bases 9 and rotating positioning pins 3.

[0033] Multiple kneading roller fixing bases 9 are evenly arranged along the circumference of turntable 1.

[0034] The rotating positioning pin 3 is fixed coaxially with the turntable 1, and multiple dust removal and flattening wheels 2 rotate around the rotating positioning pin 3.

[0035] Turntable 1 is driven to rotate by a motor. Since the rotating positioning pin 3 is installed inside the rotating positioning pin bearing 7, it remains stationary after contacting the cylindrical battery of the product, and the rotating positioning pin bearing 7 rotates with turntable 1. After the dust removal and leveling roller 2 contacts the cylindrical battery of the product, the rotation of turntable 1 will drive the leveling roller fixing base 9 to rotate, because the dust removal and leveling roller 2 is assembled on turntable 1 together with the rotating positioning pin bearing 7.

[0036] The dust removal and smoothing wheel 2 is connected to the smoothing wheel fixed base 9.

[0037] It also includes a kneading wheel fixing bearing 8, which is installed on the kneading wheel fixing base 9, and a dust removal kneading wheel 2 is installed on the kneading wheel fixing bearing 8.

[0038] The dust removal and flattening roller 2 includes a flattening head 23, and the flattening head 23 has a dust suction hole 5 around its perimeter.

[0039] The dust-removing kneading roller 2 is installed on the kneading roller fixed base 9. When the kneading roller fixed base 9 is rotating under motor drive, the dust-removing kneading roller 2 does not rotate because it is not in contact with the processed product.

[0040] The dust removal and smoothing roller 2 has a cavity structure inside, the dust suction hole 5 of the smoothing roller is connected to the cavity structure, and the cavity structure is connected to a vacuum suction connector 10.

[0041] The angle between the chamfers of the flattened head 11 is 12.5-15 degrees.

[0042] It also includes an active rotating motor, which drives the dust-removing and flattening wheel 2 to rotate. The dust-removing and flattening wheel 2 also includes a rotating shaft 21 and an extrusion part 22. The head of the processing part of the flattening head 23 is conical. The flattening head 23 is connected to the rotating shaft 21 through the extrusion part 22. The rotating shaft 21 is connected to the flattening wheel fixed base 9 through the flattening wheel fixed bearing 8. The rotating shaft 21, the extrusion part 22 and the flattening head 23 are coaxially arranged. The rotating shaft 21 drives the extrusion part 22 and the flattening head 23 to rotate.

[0043] It also includes a rotary positioning pin bearing 7, which is mounted on the turntable 1, and a rotary positioning pin 3 is mounted on the rotary positioning pin bearing 7.

[0044] The core 4 is pressed by the dust-removing and leveling roller 2 on the turntable 1 under the drive of the active rotating motor to make the current collector surface of the core 4 evenly adhere together. Before the dust-removing and leveling roller 2 adheres to the current collector of the core 4, the rotating positioning pin 3 is first introduced into the hole of the core 4. Because the rotating positioning pin 3 is installed inside the rotating positioning pin bearing 7, during the rotation of the turntable 1, the rotating positioning pin 3 is introduced into the center hole of the core 4 and keeps it stationary with the core 4. This protects the current collector outside the center hole from collapsing and blocking the center hole of the core 4, ensuring that the diaphragm and positive and negative electrode plates in the center hole of the core 4 are not damaged. The dust removal and smoothing roller 2 has a built-in dust suction hole 5. When the dust removal and smoothing roller 22 is working, the external negative pressure suction pipe 10 removes the dust from the surface of the core 4 collector under negative pressure, preventing the core 4 from short-circuiting due to dust. The dust removal and smoothing roller 2 has a built-in guide and shaping mechanism 6, which controls the outer edge of the core 4 collector during the process. This guide and shaping mechanism 6 constrains the head of the core 4 to expand outward, ensuring that it is inserted into the shell in subsequent processes.

[0045] This utility model includes a flattening head and an edge guiding constraint function. The flattening head has a built-in dust collection function during operation and an anti-clogging function for the core hole during flattening. The outer surface of the flattening head forms a flat surface that can contact the surface of the electrode tab. The guiding and shaping system for the edge guiding constraint function is located on the outer side of the flattening head and protrudes from the side opposite to the mounting body, forming a constraint surface that can contact the edge end of the electrode tab. During high-speed operation, dust is generated due to the contact friction between the flattening wheel and the core current collector substrate surface. The dust-collecting flattening wheel has a built-in dust collection hole to absorb and remove the dust, thus completing the flattening process. The head has a built-in positioning and rotating pin to prevent the core hole from clogging. During the core flattening process, the rotating positioning pin is inserted into the core hole to shape it. This prevents the current collector from filling the core hole due to external pressure during the flattening process when the flattening roller contacts the core current collector. This function aims to ensure the stability of subsequent processing steps. The tab flattening structure of this application can flatten the tab while guiding and constraining the edge of the tab, flattening dust adsorption and preventing the core hole from clogging. This limits the flattened tab to a safe range, reduces the possibility of production defects, and improves the feasibility of battery production.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for flattening, dust removal, anti-clogging, and shaping cylindrical battery all-pole tab winding cores, characterized in that, It includes several rotating positioning pins and dust-removing and smoothing wheels. The multiple dust-removing and smoothing wheels rotate around the rotating positioning pins, and the dust-removing and smoothing wheels have their own guiding and shaping mechanisms. It also includes a kneading wheel fixing base, wherein the dust-removing kneading wheel is connected to the kneading wheel fixing base; It also includes a turntable, which carries multiple kneading wheel fixing bases and rotating positioning pins. The multiple kneading wheel fixing bases are evenly arranged along the circumference of the turntable, and the rotating positioning pins are fixed coaxially with the turntable. The dust removal and flattening roller includes a flattening head, and the flattening head has dust suction holes around its perimeter.

2. The cylindrical battery all-pole tab winding flattening, dust extraction, anti-clogging, and shaping device according to claim 1, characterized in that, The flat head comes with a built-in guiding and shaping system.

3. The cylindrical battery all-pole tab winding flattening, dust extraction, anti-clogging, and shaping device according to claim 2, characterized in that, The dust-removing kneading wheel also includes a rotating shaft and an extrusion section. The head of the kneading head is conical. The kneading head is connected to the rotating shaft via the extrusion section. The rotating shaft is fixedly connected to the kneading wheel base. The rotating shaft, extrusion section, and kneading head are coaxially arranged. The rotating shaft drives the extrusion section and kneading head to rotate.

4. The cylindrical battery all-pole tab winding flattening, dust extraction, anti-clogging, and shaping device according to claim 3, characterized in that, It also includes a rotary positioning pin bearing, which is mounted on the turntable, and the rotary positioning pin is mounted on the rotary positioning pin bearing.

5. The cylindrical battery all-pole tab winding flattening, dust extraction, anti-clogging, and shaping device according to claim 1, characterized in that, It also includes a flattening wheel fixed bearing, which is installed on the flattening wheel fixed base, and a dust removal flattening wheel is installed on the flattening wheel fixed bearing.

6. The cylindrical battery all-pole tab winding flattening, dust extraction, anti-clogging, and shaping device according to claim 5, characterized in that, The dust-removing kneading wheel has an internal cavity structure, and the dust suction holes of the kneading wheel are connected to the cavity structure. The cavity structure is connected to a vacuum suction connector.

7. The cylindrical battery all-pole tab winding flattening, dust extraction, anti-clogging, and shaping device according to claim 1, characterized in that, The turntable is driven to rotate by a motor.

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