A battery cell unloading device and a battery cell winding system

Abstract

This utility model provides a battery cell unloading device and a battery cell winding system, relating to the field of battery processing and manufacturing technology. It addresses the technical problem in the prior art where insufficient separation between the outer winding needle surface and the inner wall of the battery cell leads to separator wrinkling or core pulling, thus affecting battery cell performance and quality. The battery cell unloading device includes a winding needle assembly and an unloading assembly. The winding needle assembly includes a winding needle body, multiple air chambers formed on the winding needle body, and multiple air holes communicating with the air chambers. One end of each air chamber is provided with a pressure control interface, which allows the air chamber to have both positive and negative pressure states. The unloading assembly includes multiple unloading clamping needles to drive the module. This utility model effectively solves the problem of separator wrinkling or core pulling caused by insufficient separation between the winding needle body and the inner wall of the battery cell by forming air chambers on the winding needle body, thereby ensuring the performance and quality of the battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery processing and manufacturing technology, and more specifically, to a battery cell unloading device and a battery cell winding system. Background Technology

[0002] Cell unloading refers to the process of safely removing the wound cell core from the winding needle of the winding machine, so as to deliver qualified cores for subsequent processes such as casing and packaging.

[0003] In the existing unloading process, the unloading clamping pin needs to support the inner wall of the battery cell, and then the outer surface of the outer coiling pin is separated from the inner wall of the battery cell by mechanically reducing the circumference of the outer coiling pin. However, when the outer surface of the outer coiling pin is not sufficiently separated from the inner wall of the battery cell, it is easy to cause the diaphragm to wrinkle or the core to be pulled out, thereby affecting the performance and quality of the battery cell. Utility Model Content

[0004] The purpose of this utility model is to provide a battery cell unloading device and a battery cell winding system to improve the technical problem in the prior art where insufficient separation between the outer winding needle surface and the inner wall of the battery cell leads to diaphragm wrinkling or core pulling, which in turn affects the performance and quality of the battery cell.

[0005] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a battery cell unloading device, suitable for unloading battery cells, comprising: A needle winding assembly includes a needle winding body, multiple air chambers formed on the needle winding body, and multiple air holes communicating with the air chambers; one end of each air chamber is provided with an air pressure control interface, which enables the air chamber to have a positive pressure state and a negative pressure state; when the air chamber is in a positive pressure state, a first gap is generated between the battery cell and the needle winding body; when the air chamber is in a negative pressure state, the battery cell is adsorbed onto the needle winding body; The unloading assembly includes multiple unloading pins and a drive module; the multiple unloading pins are used to clamp the battery cell through the first gap, and the drive module is used to drive the multiple unloading pins so that the battery cell is disengaged from the winding needle body.

[0006] In an optional embodiment, the needle coil body includes an inner needle coil and an outer needle coiled to the inner needle coil; The outer winding needle includes a first outer winding needle and a second outer winding needle symmetrically arranged around the inner winding needle and capable of moving relative to or away from each other, with a second gap formed between the first outer winding needle and the second outer winding needle.

[0007] In an optional embodiment, the air cavity is symmetrically opened along the axial direction of the first and / or second outer curling needles.

[0008] In an optional implementation, the number of air chambers is 2-12.

[0009] In an optional embodiment, the unloading clamp includes a connecting plate, an inner clamp connecting block, an outer clamp connecting block, and an inner clamp and an outer clamp respectively disposed on the inner clamp connecting block and the outer clamp connecting block; The inner clamping pin connecting block is fixedly connected to the connecting plate, and the outer clamping pin connecting block is movably connected to the connecting plate through a clamping drive component.

[0010] In an optional embodiment, the drive module includes a first drive component, a second drive component connected to the first drive component, and a plurality of third drive components connected to the second drive component; The plurality of the unloading clamps are correspondingly connected to the plurality of the third driving components; The first driving member, the second driving member, and the third driving member are respectively used to drive the unloading clamping pin to move in the first direction, the second direction, and the third direction.

[0011] In an optional embodiment, a flexible protective layer is provided on the side of the outer clamping needle close to the inner clamping needle.

[0012] In an optional embodiment, the clamping drive component is either a cylinder or a lead screw and slide rail mechanism.

[0013] In an optional embodiment, the first driving member, the second driving member, and the third driving member are any one of a linear motor, a lead screw and guide rail mechanism, and a synchronous belt drive mechanism.

[0014] Secondly, this utility model provides a battery cell winding system, including the battery cell unloading device described in any of the foregoing embodiments.

[0015] The beneficial effects of the battery cell unloading device and battery cell winding system provided in this embodiment of the utility model include: This utility model provides a battery cell unloading device and a battery cell winding system having the battery cell unloading device. The battery cell unloading device includes a winding needle assembly and an unloading assembly. The winding needle assembly includes a winding needle body, multiple air cavities formed on the winding needle body, and air holes communicating with the multiple air cavities. By setting an air pressure control interface at one end of the air cavity, the air cavity can have a positive pressure state and a negative pressure state. During the battery cell winding process, the air pressure control interface can make the air cavity a negative pressure state, thereby making the winding needle body generate an adsorption force on the battery cell. During the battery cell unloading process, the air pressure control interface can make the air cavity a positive pressure state, thereby forming a first gap between the inner wall of the battery cell and the winding needle body, thus avoiding the problem of insufficient peeling between the winding needle body and the battery cell, and facilitating the unloading assembly to unload the battery cell through the first gap. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the battery cell unloading device provided in this embodiment; Figure 2 This is a schematic diagram of the winding needle assembly in the battery cell unloading device provided in this embodiment; Figure 3 This is a schematic diagram of the unloading clamp needle in the battery cell unloading device provided in this embodiment.

[0018] Icon: 100 - Battery Cell; 200 - Needle coil assembly; 210 - Needle coil body; 211 - Inner needle coil; 212 - Outer needle coil; 2121 - First outer needle coil; 2122 - Second outer needle coil; 220 - Air chamber; 230 - Air hole; 300 - Unloading assembly; 310 - Unloading clamping pin; 311 - Connecting plate; 312 - Inner clamping pin connecting block; 313 - Outer clamping pin connecting block; 314 - Inner clamping pin; 315 - Outer clamping pin; 316 - Clamping drive component; 320 - Drive module; 321 - First drive component; 322 - Second drive component; 323 - Third drive component; A1 - First gap; A2 - Second gap. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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 embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] In the battery manufacturing industry, cell unloading refers to the process of removing the wound battery cells from the winding machine needles, supplying them with qualified cores for subsequent processes such as casing and packaging. Due to the frictional and electrostatic attraction between the battery cells and the winding machine needles, insufficient separation may occur during cell unloading. This can easily lead to separator wrinkling or core pulling, thus affecting the performance and quality of the battery cells.

[0026] The following describes in detail the overall structure, working principle, and technical effects of the battery cell unloading device and battery cell winding system provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0027] This utility model provides a battery cell unloading device and a battery cell 100 winding system having the battery cell unloading device. The battery cell unloading device is used to remove the wound battery cell 100 core from the winding needle of the winding machine to complete the unloading process of the battery cell 100 core.

[0028] Please see Figure 1 This embodiment provides a battery cell unloading device suitable for unloading battery cells 100, including a needle winding assembly 200 and an unloading assembly 300; wherein, the needle winding assembly 200 includes a needle winding body 210, the needle winding body 210 includes an inner needle winding 211 and an outer needle winding 212 connected to the inner needle winding 211. The unloading assembly 300 includes a plurality of unloading clamping needles 310 and a drive module 320.

[0029] Please see Figure 1 and Figure 2The outer winding needle 212 includes a first outer winding needle 2121 and a second outer winding needle 2122. The first outer winding needle 2121 and the second outer winding needle 2122 are symmetrically arranged on the inner winding needle 211, and the first outer winding needle 2121 and the second outer winding needle 2122 together form a cylindrical structure for winding the battery cell 100. A second gap A2 is formed between the first outer winding needle 2121 and the second outer winding needle 2122. On the one hand, the inner winding needle 211 can drive the first outer winding needle 2121 and the second outer winding needle 2122 to rotate in the circumferential direction. On the other hand, the first outer winding needle 2121 and the second outer winding needle 2122 can move relative to each other or move in opposite directions under the drive of the inner winding needle 211, so as to adapt to different core diameters or different working needs.

[0030] The relative motion here refers to the movement of the first outer curling needle 2121 and the second outer curling needle 2122 towards each other, at which time the second gap A2 gradually shrinks, that is, the process of the outer diameter of the outer curling needle 212 retracting; the opposite motion refers to the movement of the first outer curling needle 2121 and the second outer curling needle 2122 away from each other, at which time the second gap A2 gradually increases, that is, the process of the outer diameter of the outer curling needle 212 opening.

[0031] Meanwhile, the existence of the second gap A2 can provide a buffer for the unloading clamp needle 310, so that the unloading clamp needle 310 can extend into the second gap A2 to achieve the gripping of the battery cell 100.

[0032] To prevent insufficient separation of the battery cell 100 from the winding needle body 210 during unloading, in some embodiments, the winding needle assembly 200 further includes multiple air chambers 220 formed on the winding needle body 210 and multiple air holes 230 communicating with the air chambers 220; one end of the air chamber 220 is provided with an air pressure control interface, which is connected to an external positive and negative pressure control device, which enables the air chamber 220 to have a relative positive pressure state and a negative pressure state through the air pressure control interface.

[0033] The positive pressure state here specifically refers to the positive and negative pressure control device filling the air chamber 220 with gas through the air pressure control interface, so as to increase the gas pressure in the air chamber 220 and discharge the gas through multiple air holes 230, thereby creating a first gap A1 between the battery cell 100 and the winding needle body 210 under the action of airflow; the negative pressure state here refers to the positive and negative pressure control device extracting gas from the air chamber 220 through the air pressure control interface, so as to reduce the gas pressure in the air chamber 220, thereby causing the battery cell 100 to adhere to the surface of the winding needle body 210 under the action of external air pressure.

[0034] Furthermore, in actual operation, when the air chamber 220 is under positive pressure, a first gap A1 is generated between the battery cell 100 and the winding needle body 210, causing the battery cell 100 to completely separate from the surface of the winding needle body 210; when the air chamber 220 is under negative pressure, the battery cell 100 is adsorbed onto the surface of the winding needle body 210 under the action of external air pressure, thereby further fixing the battery cell 100 during the winding process.

[0035] In one specific embodiment, the number of air cavities 220 is four, and they are all symmetrically opened along the axial direction of the first outer curling needle 2121 and the second outer curling needle 2122.

[0036] It is understandable that, in order to improve the separation effect between the battery cell 100 and the coiled needle body 210 when the air chamber 220 is under positive pressure, or to improve the adsorption effect of the coiled needle body 210 on the battery cell 100 when the air chamber 220 is under negative pressure, the operator can adaptably increase or decrease the number of air chambers 220. For example, the number of air chambers 220 can be 2, 4, 6, 8, 10, 12, etc., and is not limited here.

[0037] In several other embodiments, the air cavity 220 can also be arranged circumferentially along the first outer winding needle 2121 and / or the second outer winding needle 2122 to achieve peeling / adsorption of the battery cell 100.

[0038] During the unloading process of the battery cell 100, when the positive and negative pressure control device discharges gas through multiple air holes 230 via the air pressure control interface, and a first gap A1 is generated between the battery cell 100 and the winding needle body 210 under the action of airflow, the unloading clamp needle 310 can clamp the battery cell 100 through the first gap A1, and the unloading clamp needle 310 is driven by the drive module 320 to disengage the battery cell 100 from the winding needle body 210.

[0039] In some embodiments, the number of unloading pins 310 is two. The two unloading pins 310 are usually symmetrically arranged and configured on the same plane corresponding to the second gap A2, so as to facilitate the clamping and unloading of the battery cell 100.

[0040] Please see Figure 3 Taking a single unloading clamp 310 as an example, in a specific embodiment, the unloading clamp 310 includes a connecting plate 311, an inner clamp connecting block 312, an outer clamp connecting block 313, and an inner clamp 314 and an outer clamp 315 respectively disposed on the inner clamp connecting block 312 and the outer clamp connecting block 313; wherein, the inner clamp connecting block 312 is fixedly connected to the connecting plate 311, and the outer clamp connecting block 313 is movably connected to the connecting plate 311 through a clamping drive member 316.

[0041] In actual operation, the inner clamping pin 314 is fixed, and the outer clamping pin 315 can move relative to the inner clamping pin 314 through the outer clamping pin connecting block 313 and the clamping drive member 316, so that when the battery cell 100 is between the inner clamping pin 314 and the outer clamping pin 315, the battery cell 100 can be clamped.

[0042] In order to prevent the unloading pin 310 from damaging the battery cell 100 when it clamps the battery cell 100, in this embodiment, the outer pin 315 is provided with a flexible protective layer (not shown in the figure) on the side near the inner pin 314.

[0043] After the unloading pin 310 completes the clamping action on the battery cell 100, it needs to be driven by the drive module 320 to disengage the battery cell 100 from the winding needle body 210.

[0044] For ease of understanding and description, in this embodiment, the direction perpendicular to the ground is taken as the first direction, the radial horizontal direction of the needle coil body 210 is taken as the second direction, and the direction relative to the axial direction of the needle coil body 210 is taken as the third direction.

[0045] In some embodiments, the drive module 320 includes a first drive member 321, a second drive member 322 connected to the first drive member 321, and a plurality of third drive members 323 connected to the second drive member 322; wherein the first drive member 321, the second drive member 322, and the third drive member 323 are respectively used to drive the unloading clamp needle 310 to move in a first direction, a second direction, and a third direction.

[0046] In actual operation, the first drive unit 321 is used to drive the unloading clamp needle 310 to move in a direction perpendicular to the ground to achieve height adjustment; the second drive unit 322 is used to drive the unloading clamp needle 310 to move in a horizontal direction so that multiple unloading clamp needles 310 can adapt to cores of different sizes; the third drive unit 323 is used to drive the unloading clamp needle 310 to complete the insertion and removal of needles.

[0047] In one specific embodiment, the clamping drive 316 is any one of a cylinder or a lead screw and slide rail mechanism; the first drive 321, the second drive 322, and the third drive 323 are any one of a linear motor, a lead screw and slide rail mechanism, and a synchronous belt drive mechanism.

[0048] The specific working process of the battery cell unloading device provided by this utility model mainly includes the transfer process of the battery cell 100 from the winding needle body 210 to the unloading clamp needle 310 and the unloading process in which the drive module 320 drives the unloading clamp needle 310 to disengage the battery cell 100 from the winding needle body 210.

[0049] The transfer process of battery cell 100 from winding needle body 210 to unloading clamp needle 310 is as follows: After the tail adhesive is applied, the battery cell 100 is hung on the coiling needle body 210. At this time, the first outer coiling needle 2121 and the second outer coiling needle 2122 are in a relatively open state to tautly hold the battery cell 100 with the tail adhesive applied. Then, the coiling needle body 210 is either in its original position or moved to the unloading station, so that the second gap A2 is in a horizontal position. At this time, the first driving member 321 and the second driving member 322 make the unloading clamping needle 310 align with the outer coiling needle 212, specifically, so that the two unloading clamping needles 310 are symmetrical about the outer coiling needle 212 and aligned vertically with the second gap A2. At this time, the positive and negative pressure control equipment controls the pressure through the pneumatic control interface. Gas is discharged through the vent 230, and under the action of the airflow, a first gap A1 is created between the battery cell 100 and the coiling needle body 210 to separate the battery cell 100 from the outer coiling needle 212. Under the action of the third driving member 323, the unloading clamping needle 310 extends into the battery cell 100, specifically so that the battery cell 100 is between the inner clamping needle 314 and the outer clamping needle 315. Then, the clamping driving member 316 drives the outer clamping needle 315 to move and complete the clamping action of the battery cell 100. Finally, the outer diameter of the outer coiling needle 212 is driven to retract, completing the transfer of the battery cell 100 from the coiling needle body 210 to the unloading clamping needle 310.

[0050] The unloading process, in which the drive module 320 drives the unloading clamp 310 to disengage the battery cell 100 from the winding needle body 210, is as follows: After the battery cell 100 is transferred from the winding needle body 210 to the unloading clamp needle 310, the unloading clamp needle 310 performs a needle-pulling action under the drive of the third driving member 323. The unloading clamp needle 310 carries the battery cell 100 away from the winding needle body 210 under the drive of the third driving member 323, thus completing the unloading.

[0051] The battery cell unloading device and the battery cell 100 winding system with the battery cell unloading device provided by this utility model can, on the one hand, make the air chamber 220 positive pressure through the air pressure control interface, thereby forming a first gap A1 between the inner wall of the battery cell 100 and the winding needle body 210, thus avoiding the problem of diaphragm wrinkling or core pulling caused by insufficient peeling between the surface of the outer winding needle 212 and the inner wall of the battery cell 100; on the other hand, it can make the air chamber 220 negative pressure through the air pressure control interface, so that the winding needle body 210 has an adsorption effect on the battery cell 100, thereby improving the fixing effect of the winding needle body 210 on the battery cell 100 and facilitating the winding of the battery cell 100.

[0052] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cell unloading device, characterized in that, Suitable for unloading battery cells (100), including: A needle winding assembly (200) includes a needle winding body (210), a plurality of air chambers (220) formed on the needle winding body (210), and a plurality of air holes (230) communicating with the air chambers (220); one end of the air chamber (220) is provided with an air pressure control interface, which enables the air chamber (220) to have a positive pressure state and a negative pressure state; when the air chamber (220) is in a positive pressure state, a first gap (A1) is generated between the battery cell (100) and the needle winding body (210); when the air chamber (220) is in a negative pressure state, the battery cell (100) is adsorbed onto the needle winding body (210); The unloading assembly (300) includes a plurality of unloading pins (310) and a drive module (320); the plurality of unloading pins (310) are used to clamp the battery cell (100) through the first gap (A1), and the drive module (320) is used to drive the plurality of unloading pins (310) so that the battery cell (100) is disengaged from the coiled needle body (210).

2. The cell unloading device according to claim 1, characterized in that, The coiled needle body (210) includes an inner coiled needle (211) and an outer coiled needle (212) connected to the inner coiled needle (211). The outer coil needle (212) includes a first outer coil needle (2121) and a second outer coil needle (2122) that are symmetrically arranged around the inner coil needle (211) and capable of moving relative to or away from each other, with a second gap (A2) formed between the first outer coil needle (2121) and the second outer coil needle (2122).

3. The cell unloading device according to claim 2, characterized in that, The air cavity (220) is symmetrically opened along the axial direction of the first outer coil needle (2121) and / or the second outer coil needle (2122).

4. The cell unloading device according to claim 3, characterized in that, The number of air cavities (220) is 2-12.

5. The cell unloading device according to claim 1, characterized in that, The unloading clamp (310) includes a connecting plate (311), an inner clamp connecting block (312), an outer clamp connecting block (313), and an inner clamp (314) and an outer clamp (315) respectively disposed on the inner clamp connecting block (312) and the outer clamp connecting block (313). The inner clamping pin connecting block (312) is fixedly connected to the connecting plate (311), and the outer clamping pin connecting block (313) is movably connected to the connecting plate (311) through the clamping drive (316).

6. The cell unloading device according to claim 5, characterized in that, The drive module (320) includes a first drive element (321), a second drive element (322) connected to the first drive element (321), and a plurality of third drive elements (323) connected to the second drive element (322). The plurality of the unloading clamps (310) are correspondingly connected to the plurality of the third drive members (323); The first driving member (321), the second driving member (322) and the third driving member (323) are respectively used to drive the unloading clamp needle (310) to move in the first direction, the second direction and the third direction.

7. The cell unloading device according to claim 5, characterized in that, The outer clamping needle (315) has a flexible protective layer on the side near the inner clamping needle (314).

8. The cell unloading device according to claim 5, characterized in that, The clamping drive component (316) can be any one of a cylinder or a lead screw slide mechanism.

9. The cell unloading device according to claim 6, characterized in that, The first driving member (321), the second driving member (322), and the third driving member (323) are any one of a linear motor, a lead screw and slide rail mechanism, and a synchronous belt drive mechanism.

10. A cell winding system, characterized in that, Includes the cell unloading device according to any one of claims 1-9.

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