A battery core winding mechanism and a battery core winding method

Abstract

The present invention discloses a battery cell winding mechanism and a battery cell winding method, which relate to the technical field of battery cell production equipment, and include a winding needle guiding mechanism, wherein the winding needle guiding mechanism is provided with three groups and are respectively located at a winding station, a gluing station and a material unloading station; the winding needle guiding mechanism includes a winding head assembly, a winding head fixing assembly fixedly connected to the winding head assembly, a gasket unit arranged outside the winding head assembly, a gasket fixing assembly fixedly connected to the gasket unit and a driving assembly connected to the gasket unit; the winding head assembly includes a fixed plate, a first winding unit and a second winding unit arranged on the left and right sides of the fixed plate; the gasket units are provided with two groups, and the two groups of gasket units are respectively arranged on the upper and lower sides of the fixed plate; driven by the driving assembly and the gasket fixing assembly, the two groups of gasket units can move away from or approach the fixed plate at the same time; the present invention enables the battery cell to fully release the internal stress accumulated during the winding process.

Description

Technical Field

[0001] The present invention relates to the technical field related to battery cell production equipment, and in particular to a battery cell winding mechanism and a battery cell winding method. Background Art

[0002] The battery cell of a lithium battery is composed of a separator and positive and negative electrode sheets. Usually, the battery cell is wound into a battery cell using a winding needle of a winding device, and then subjected to subsequent processing. The winding needle is the core part of the winding process. For square batteries manufactured using the winding process, there are gaps at the corners of each layer, which prevents the inner and outer separators of the battery cell from shrinking in proportion, making the inner layer of the battery cell prone to S-shape and inner layer wrinkles, affecting the quality of the battery cell.

[0003] At present, the winding process is required for the processing of wound lithium batteries in the industry. This process has the advantages of high production efficiency and low cost. However, it also has an obvious disadvantage, that is, when winding, the winding strip must be wound by tension traction. This tension will directly cause a certain internal stress in the wound battery cell. Especially when the winding speed is fast, the accumulation effect of the internal stress will be more obvious. The stress will be slowly released during the heavy discharge cycle of the battery, causing the battery to deform and cause the cycle performance to deteriorate, and finally causing the battery's energy reserve to drop significantly or even cause the battery to be scrapped.

[0004] When the winding is completed and the strip partition is pulled out, a gap is formed at the position where the strip partition was originally set. The core strip body of the battery core will be deformed and quickly fill the gap. During the deformation process, the core strip body will release the internal stress accumulated in the winding process, so that the internal stress of the battery core is greatly reduced, and the internal structure stability of the battery core is also improved accordingly, thereby avoiding the degradation of battery performance or even scrapping due to internal deformation in the subsequent processing and use of the battery cell, effectively maintaining the stability of battery performance and improving the safety and service life of the TV.

[0005] However, the existing battery cell winding equipment directly and quickly pulls out the strip partition after completing the winding work, which causes damage to the innermost diaphragm or stage sheet of the battery cell. In addition, since the strip partition occupies a small space inside the battery cell, the deformation amplitude of the battery core is also small, and it is difficult to fully release the internal stress accumulated during the winding process. Summary of the invention

[0006] In order to solve the defects in the prior art, the present invention provides a battery core winding mechanism and a battery core winding method.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] The present invention provides a battery core winding mechanism, comprising a turntable mechanism, a reversing mechanism and a driving mechanism arranged on the turntable mechanism, and further comprising:

[0009] The winding needle guide mechanism is provided with three groups and is respectively located at the winding station, the gluing station and the unloading station;

[0010] The winding needle guide mechanism includes a winding head assembly, a winding head fixing assembly fixedly connected to the winding head assembly, a gasket unit arranged outside the winding head assembly, a gasket fixing assembly fixedly connected to the gasket unit, and a driving assembly connected to the gasket unit;

[0011] The winding head assembly includes a fixed plate, a first winding unit and a second winding unit arranged on the left and right sides of the fixed plate;

[0012] The gasket units are provided in two groups, and the two groups of gasket units are respectively arranged on the upper and lower sides of the fixing plate;

[0013] Driven by the driving assembly and the gasket fixing assembly, the two groups of gasket units can move away from or close to the fixing plate at the same time;

[0014] When the gasket unit moves toward the winding head assembly position, the two groups of gasket units will respectively drive the first winding unit and the second winding unit away from the fixed plate. When the gasket unit moves away from the winding head assembly position, the first winding unit and the second winding unit will approach the fixed plate.

[0015] As a preferred technical solution of the present invention, the gasket unit includes a winding portion, an inclined plate portion integrally formed with the winding portion, and a flat plate portion connected to the inclined plate portion.

[0016] As a preferred technical solution of the present invention, the first winding unit includes:

[0017] A winding plate connected to the fixed plate through a plurality of groups of plug rods;

[0018] A guide portion, formed integrally with the winding plate, the guide portion being disposed in contact with the inclined plate portion;

[0019] Buffer springs, the winding plate is connected to the fixed plate through a plurality of groups of the buffer springs;

[0020] The side edge of the fixing plate is provided with a plurality of groups of inserting holes at positions corresponding to the inserting rods.

[0021] As a preferred technical solution of the present invention, the winding head fixing assembly includes a fixing joint for fixing the fixing plate, a support tube sleeved inside the fixing joint, a connecting head fixedly arranged on the outside of the support tube, and a connecting ring arranged at the end of the support tube.

[0022] As a preferred technical solution of the present invention, the gasket fixing assembly includes:

[0023] A fixed block, slidably disposed inside the support tube;

[0024] A support plate is arranged at the center of the fixing block, and the upper and lower sides of the support plate are respectively connected to the two groups of gasket units through a plurality of connecting springs;

[0025] The slide rod is slidably arranged on the support tube and fixedly connected to the fixed block. A fixing ring is fixedly arranged on the outer side of the slide rod.

[0026] As a preferred technical solution of the present invention, the driving assembly includes:

[0027] A bidirectional threaded rod is rotatably arranged on the support plate, and two ends of the bidirectional threaded rod are respectively transmission-arranged with the two groups of gasket units;

[0028] A first gear, fixedly connected to an end of the bidirectional threaded rod;

[0029] The second gear is transmission-connected with the first gear and is transmission-connected with the first driving unit. The first driving unit is fixedly disposed on the supporting tube.

[0030] As a preferred technical solution of the present invention, a needle threading mechanism is provided at the winding station, and the needle threading mechanism includes a first winding moving component for driving the winding needle guide mechanism to move and a first gasket moving component for driving the gasket unit to move.

[0031] As a preferred technical solution of the present invention, the first winding and moving assembly comprises:

[0032] A second driving unit is arranged on the supporting base;

[0033] A transmission rod, arranged for transmission with the second driving unit;

[0034] A movable base, which is transmission-connected to the transmission rod and is disposed on the supporting base;

[0035] A clamping plate, fixedly disposed on the mobile base and clamped with the connector;

[0036] The first gasket moving assembly includes a fixing seat fixedly arranged on the moving base, a telescopic unit arranged on the fixing seat, and a guide block connected to the telescopic unit and arranged corresponding to the fixing ring.

[0037] As a preferred technical solution of the present invention, a needle withdrawal mechanism is provided at the glue laminating station, and the needle withdrawal mechanism includes a second winding moving assembly and a second gasket moving assembly which are independently provided.

[0038] The present invention also provides a winding method for a battery core winding mechanism, comprising the following steps:

[0039] S1: The needle threading mechanism works. When the first winding moving assembly works, it will synchronously drive the first gasket moving assembly, thereby driving the gasket unit and the winding needle guide mechanism to move toward the winding station at the same time. At this time, the first winding unit and the second winding unit will extend outward under the drive of the gasket unit;

[0040] S2: The first driving unit works and drives the bidirectional threaded rod to rotate, thereby adjusting the heights of the two sets of gasket units to a suitable position;

[0041] S3: The initial winding work is completed under the drive mechanism, and the station switching is completed under the drive of the turntable mechanism;

[0042] S4: After the gluing work is completed, first, the first driving unit works and drives the two sets of gasket units to approach the fixing plate. At this time, the inside of the battery cell will gradually shrink inward along the up and down direction;

[0043] S5: the second gasket moving assembly works and drives the gasket unit away from the first winding unit and the second winding unit. The first winding unit and the second winding unit are no longer guided and supported by the gasket unit and move closer to the fixed plate. At this time, the inside of the battery cell gradually shrinks inwards again along the left and right directions.

[0044] S6: The station switching is completed under the drive of the turntable mechanism, and the battery cell unwinding is completed.

[0045] The beneficial effects of the present invention are:

[0046] In the present invention, a winding needle guide mechanism is provided, including a winding head assembly, a gasket unit, a gasket fixing assembly and a driving assembly. Two groups of gasket units are provided to increase the space inside the battery core. Before the gasket unit is pulled out, the driving assembly can be used to drive the gasket unit to move up and down and then approach the fixing plate. When the gasket unit is no longer in close contact with the inner layer of the battery cell, the gasket unit is taken out. This arrangement can avoid damage to the diaphragm or stage sheet of the innermost layer of the battery cell due to rapid withdrawal of the gasket unit. In addition, when the gasket unit is pulled out, the first winding unit and the second winding unit will simultaneously approach the fixing plate, which can leave a gap between the left and right spaces inside the battery cell, further increasing the space for deformation of the battery cell, so that the battery cell can fully release the internal stress accumulated during the winding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0048] In the attached picture:

[0049] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0050] Figure 2 It is a structural schematic diagram of the winding needle guide mechanism.

[0051] Figure 3 It is a schematic diagram of the structure of the winding head assembly.

[0052] Figure 4 for Figure 3 A magnified schematic diagram of center A.

[0053] Figure 5 It is a schematic diagram of the local structure when the winding needle guide mechanism does not include a fixed joint.

[0054] Figure 6 A bottom view of the winding head assembly.

[0055] Figure 7 It is a schematic front view of the winding head assembly.

[0056] Figure 8 It is a schematic diagram of the structure of the gasket fixing component and the driving component.

[0057] Fig. 9 It is a schematic diagram of the partial structure of the winding head fixing assembly and the gasket fixing assembly.

[0058] Fig.10 Another structural schematic diagram of the winding head fixing assembly.

[0059] Fig.11It is a structural schematic diagram of the turntable mechanism, the reversing mechanism and the driving mechanism.

[0060] Fig.12 It is a structural schematic diagram of the needle threading mechanism and the needle withdrawal mechanism.

[0061] Fig.13 It is a structural schematic diagram of the needle threading mechanism.

[0062] Fig.14 It is a structural schematic diagram of the needle withdrawal mechanism.

[0063] Fig.15 This is a schematic diagram of the structure when a placement slot is provided on the fixed plate.

[0064] Fig.16 The present invention is a winding process flow chart of the battery cell winding mechanism.

[0065] In the figure: 1, turntable mechanism; 2, reversing mechanism; 3, driving mechanism; 4, winding needle guide mechanism; 41, winding head assembly; 411, fixing plate; 4111, plug hole; 4112, placement slot; 412, first winding unit; 4121, winding plate; 4122, plug rod; 4123, guide part; 4124, buffer spring; 413, second winding unit; 42, winding head fixing assembly; 421, fixing joint; 422, support tube; 423, connector; 424, connecting ring; 43, gasket unit; 431, winding part; 432, inclined plate part; 433, flat plate part; 44, gasket fixing assembly; 441, fixing block; 442, support plate; 4 43. Connecting spring; 444. Sliding rod; 445. Fixed ring; 45. Driving assembly; 451. Bidirectional threaded rod; 452. First gear; 453. Second gear; 454. First driving unit; 5. Needle threading mechanism; 51. First winding moving assembly; 511. Second driving unit; 512. Support base; 513. Transmission rod; 514. Moving base; 515. Snap-in plate; 52. First gasket moving assembly; 521. Fixed seat; 522. Telescopic unit; 523. Guide block; 6. Needle withdrawal mechanism; 61. Second winding moving assembly; 62. Second gasket moving assembly; 100. Winding station; 200. Gluing station; 300. Unloading station. DETAILED DESCRIPTION

[0066] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0067] Embodiment 1

[0068] like Figure 1-Figure 8As shown, a battery cell winding mechanism includes a turntable mechanism 1, a reversing mechanism 2 and a driving mechanism 3 arranged on the turntable mechanism 1, and also includes a winding needle guide mechanism 4, the winding needle guide mechanism 4 is provided with three groups and is respectively located at a winding station 100, a gluing station 200 and a blanking station 300; the winding needle guide mechanism 4 includes a winding head assembly 41, a winding head fixing assembly 42 fixedly connected to the winding head assembly 41, a gasket unit 43 arranged on the outside of the winding head assembly 41, and a gasket fixedly connected to the gasket unit 43. A fixing assembly 44 and a driving assembly 45 connected to the gasket unit 43; the winding head assembly 41 includes a fixing plate 411, a first winding unit 412 and a second winding unit 413 arranged on the left and right sides of the fixing plate 411; the gasket unit 43 is provided with two groups, and the two groups of gasket units 43 are respectively arranged on the upper and lower sides of the fixing plate 411; driven by the driving assembly 45 and the gasket fixing assembly 44, the two groups of gasket units 43 can be away from or close to the fixing plate 411 at the same time;

[0069] When the gasket unit 43 moves toward the position of the winding head assembly 41, the two groups of the gasket units 43 will respectively drive the first winding unit 412 and the second winding unit 413 away from the fixed plate 411. When the gasket unit 43 moves away from the position of the winding head assembly 41, the first winding unit 412 and the second winding unit 413 will approach the fixed plate 411.

[0070] Among them, the winding needle guide mechanism 4 in the present invention includes a winding head assembly 41, a gasket unit 43, a gasket fixing assembly 44 and a driving assembly 45. The two groups of gasket units 43 are arranged to increase the space inside the battery roll core. Before the gasket unit 43 is pulled out, the driving assembly 45 can be used to drive the gasket unit 43 to move up and down and then approach the fixed plate 411. When the gasket unit 43 is no longer in close contact with the inner layer of the battery cell, the gasket unit 43 is taken out. This arrangement can avoid damage to the innermost diaphragm or stage of the battery cell due to the rapid withdrawal of the gasket unit 43; in addition, when the gasket unit 43 is pulled out, the first winding unit 412 and the second winding unit 413 will simultaneously approach the fixed plate 411, which can leave a gap between the left and right spaces inside the battery cell, further increase the space for deformation of the battery cell, so that the battery cell can fully release the internal stress accumulated during the winding process.

[0071] Further, if Figure 3-Figure 8As shown, the gasket unit 43 includes a winding portion 431, an inclined plate portion 432 integrally formed with the winding portion 431, and a flat plate portion 433 connected to the inclined plate portion 432. The first winding unit 412 includes a winding plate 4121, an insertion rod 4122, a guide portion 4123 and a buffer spring 4124. The winding plate 4121 is connected to the fixed plate 411 through a plurality of groups of insertion rods 4122; the guide portion 4123 is integrally formed with the winding plate 4121, and the guide portion 4123 is abutted against the inclined plate portion 432; the winding plate 4121 is connected to the fixed plate 411 through a plurality of groups of the buffer springs 4124;

[0072] A plurality of groups of insertion holes 4111 are provided on the side of the fixing plate 411 at positions corresponding to the insertion rods 4122 . The first winding unit 412 and the second winding unit 413 have the same structure.

[0073] By setting the gasket unit 43 to cooperate with the first winding unit 412 and the second winding unit 413, when the gasket unit 43 moves in a direction close to or away from the first winding unit 412, the first winding unit 412 and the second winding unit 413 can be driven to move synchronously.

[0074] In this embodiment, Figure 3 , Figure 8 As a reference, the gasket unit 43 is arranged on the upper and lower sides of the fixed plate 411, the first winding unit 412 is arranged on the right side of the fixed plate 411, and the second winding unit 413 is arranged on the left side of the fixed plate 411, and the guide portion 4123 in the first winding unit 412 is arranged at the upper end of the fixed plate 411 and cooperates with the gasket unit 43 at the upper end of the fixed plate 411, and the guide portion 4123 in the second winding unit 413 is arranged at the lower end of the fixed plate 411 and cooperates with the gasket unit 43 at the lower end of the fixed plate 411;

[0075] Therefore, when the gasket unit 43 moves toward the winding head assembly 41, the gasket unit 43 at the upper end of the fixed plate 411 drives the first winding unit 412 away from the fixed plate 411, and the gasket unit 43 at the lower end of the fixed plate 411 drives the second winding unit 413 away from the fixed plate 411. At this time, the winding plate 4121 drives the buffer spring 4124 to stretch;

[0076] When the gasket unit 43 moves away from the winding head assembly 41 , the buffer spring 4124 is reset because the inclined portion on the gasket unit 43 is no longer in contact with the guide portion 4123 , and then the first winding unit 412 and the second winding unit 413 are respectively re-approached to the fixing plate 411 .

[0077] Further, if Figure 2-Figure 10As shown, the winding head fixing assembly 42 includes a fixing joint 421 for fixing the fixing plate 411, a support tube 422 sleeved inside the fixing joint 421, a connecting head 423 fixedly arranged on the outside of the support tube 422, and a connecting ring 424 arranged at the end of the support tube 422.

[0078] The winding head fixing assembly 42 is used to fix the winding head assembly 41 on the one hand, and on the other hand, it is used to cooperate with the driving mechanism 3 to drive the winding head assembly 41 to move. Therefore, the connecting ring 424 is connected to the driving structure, wherein the turntable mechanism 1, the reversing mechanism 2 and the driving mechanism 3 are all existing technologies, and their specific structures are not repeated here.

[0079] Further, if Figure 8-Figure 10 As shown, the gasket fixing assembly 44 includes a fixing block 441, a support plate 442, a connecting spring 443, a sliding rod 444 and a fixing ring 445. The fixing block 441 is slidably arranged inside the support tube 422; the support plate 442 is arranged at the center position of the fixing block 441, and the upper and lower sides of the support plate 442 are respectively connected to the two groups of the gasket units 43 through a plurality of connecting springs 443; the sliding rod 444 is slidably arranged on the support tube 422 and is fixedly connected to the fixing block 441, and a fixing ring 445 is fixedly arranged on the outer side of the sliding rod 444.

[0080] The gasket fixing assembly 44 is provided to cooperate with the gasket unit 43 so that the gasket unit 43 can be stably mounted on the gasket fixing assembly 44, and the gasket unit 43 can also move relative to the support plate 442, wherein the connecting spring 443 provided between the support plate 442 and the gasket unit 43 is mainly used to strengthen the connection effect between the gasket unit 43 and the support plate 442, and the provision of the connecting spring 443 will not affect the movement of the gasket unit 43 relative to the support plate 442;

[0081] The sliding rod 444 can be driven to move by driving the fixing ring 445 to move, thereby driving the fixing block 441 and the gasket unit 43 to move synchronously.

[0082] Further, if Figure 8 As shown, the driving assembly 45 includes a bidirectional threaded rod 451, a first gear 452, a second gear 453 and a first driving unit 454. The bidirectional threaded rod 451 is rotatably set on the support plate 442, and the two ends of the bidirectional threaded rod 451 are respectively transmission-set with the two groups of gasket units 43; the first gear 452 is fixedly connected to the end of the bidirectional threaded rod 451; the second gear 453 is transmission-set with the first gear 452 and is transmission-connected with the first driving unit 454, and the first driving unit 454 is fixedly set on the support tube 422.

[0083] Among them, by setting the driving assembly 45 to cooperate with the gasket unit 43, the two groups of gasket units 43 can be controlled to move in opposite directions. When working, the first driving unit 454 works and drives the second gear 453 to rotate. After the second gear 453 rotates, it drives the bidirectional threaded rod 451 to rotate through the first gear 452. After the bidirectional threaded rod 451 rotates, it drives the two groups of gasket units 43 to move in opposite directions. It should be noted that the first driving unit 454 and the second gear 453 are fixedly arranged on the support tube 422, and the remaining structure is connected to the gasket fixing assembly 44;

[0084] Furthermore, the two threaded portions on the bidirectional threaded rod 451 have opposite rotation directions.

[0085] It should be noted that the drive assembly 45 can also be set as a telescopic device (such as an electric push rod), but in order to make the two groups of gasket units 43 move in opposite directions, two groups of telescopic devices need to be set, and the two groups of telescopic devices are used in conjunction with the two groups of gasket units 43 respectively.

[0086] Embodiment 2

[0087] The components that are the same or corresponding to those in the first embodiment are marked with the same reference numerals as those in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0088] Further, if Figure 11-13 As shown, the winding station 100 is provided with a needle threading mechanism 5, and the needle threading mechanism 5 includes a first winding moving assembly 51 for driving the winding needle guide mechanism 4 to move and a first gasket moving assembly 52 for driving the gasket unit 43 to move;

[0089] The first winding moving assembly 51 includes a second driving unit 511, a supporting base 512, a transmission rod 513, a second driving unit 511, a moving base 514 and a clamping plate 515, wherein the second driving unit 511 is arranged on the supporting base 512; the transmission rod 513 is arranged for transmission with the second driving unit 511; the moving base 514 is transmission-connected with the transmission rod 513 and is arranged on the supporting base 512; the clamping plate 515 is fixedly arranged on the moving base 514 and clamped with the connecting head 423;

[0090] The first gasket moving assembly 52 includes a fixing seat 521 fixedly disposed on the moving base 514 , a telescopic unit 522 disposed on the fixing seat 521 , and a guide block 523 connected to the telescopic unit 522 and disposed corresponding to the fixing ring 445 .

[0091] Among them, by setting the needle threading mechanism 5 to include a first winding moving component 51 and a first gasket moving component 52, and the first winding moving component 51 will also synchronously drive the first gasket moving component 52 to move when working. In this way, there is no need to set a group of translation devices for the first gasket moving component 52, thereby saving the use of power source.

[0092] In detail, during operation, the clamping plate 515 will be clamped with the connecting head 423 in the winding head fixing assembly 42. At the same time, the telescopic unit 522 in the first gasket moving assembly 52 extends out and clamps the guide block 523 in the fixing ring 445. Then the second driving unit 511 works and drives the transmission rod 513 to rotate. After the transmission rod 513 rotates, it will drive the moving base 514 to translate on the supporting base 512, and then synchronously drive the first gasket moving assembly 52 to translate. At this time, the first winding moving assembly 51 will drive the winding needle guide mechanism 4 to translate, and the first gasket moving assembly 52 will drive the gasket unit 43 to translate.

[0093] Further, if Figure 11-Figure 15 As shown, a needle withdrawal mechanism 6 is provided at the gluing station 200, and the needle withdrawal mechanism 6 includes a second winding moving component 61 and a second gasket moving component 62 which are independently arranged. The second winding moving component 61 has the same structure as the first winding moving component 51, except that the first winding moving component 51 and the second winding moving component 61 will drive the winding needle guide mechanism 4 to move in the opposite direction when working, while the second gasket moving component 62 requires an additional translation mechanism to move it compared to the first gasket moving component 52. The second winding moving component 61 cannot synchronously drive the first gasket moving component 52 to move, and its purpose is to make the gasket unit 43 and the winding needle guide mechanism 4 move alternately.

[0094] Generally speaking, a group of gasket moving components is additionally fixedly arranged on the turntable mechanism 1. The structure of the gasket moving component is the same as that of the first gasket moving component 52. The difference is that the gasket moving component is fixed on the turntable mechanism 1 and cannot move with the first winding moving component 51. The purpose is to limit the gasket unit 43 through the gasket moving component when the gasket unit 43 is not needed during the winding of some battery cells, so that the gasket unit 43 cannot follow the winding needle guide mechanism 4 to move to the winding station 100 (which is the prior art);

[0095] Considering that the gasket unit 43 in the present invention can be lifted and lowered under the drive of the driving assembly 45, a placement groove 4112 for placing the winding portion 431 can also be opened at the position of the fixed plate 411 corresponding to the winding portion 431 in the gasket unit 43. In this way, when the gasket unit 43 is not needed, there is no need to set up an additional gasket moving assembly. It is only necessary to control the driving assembly 45 to work and move the gasket unit 43 to the inside of the placement groove 4112 (such as Fig.15 As shown, it is necessary to ensure that the upper surface of the gasket unit 43 inside the placement groove 4112 is lower than the upper surface of the fixing plate 411), which simplifies the structure of the winding mechanism.

[0096] Embodiment 3

[0097] The components identical or corresponding to those in the second embodiment are marked with the same reference numerals as those in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The third embodiment differs from the second embodiment in that:

[0098] like Fig.16 As shown, the present invention also provides a winding method for a battery core winding mechanism, comprising the following steps:

[0099] S1: The needle threading mechanism 5 works. When the first winding moving assembly 51 works, it will synchronously drive the first gasket moving assembly 52, thereby driving the gasket unit 43 and the winding needle guide mechanism 4 to move toward the winding station 100 at the same time. At this time, the first winding unit 412 and the second winding unit 413 will extend outwards driven by the gasket unit 43;

[0100] S2: The first driving unit 454 works and drives the bidirectional threaded rod 451 to rotate, thereby adjusting the heights of the two sets of gasket units 43 to a suitable position;

[0101] S3: The preliminary winding work is completed under the drive of the driving mechanism 3, and the station switching is completed under the drive of the turntable mechanism 1;

[0102] S4: After the gluing work is completed, first, the first driving unit 454 works and drives the two sets of gasket units 43 to approach the fixing plate 411. At this time, the inside of the battery cell gradually shrinks inward along the up and down direction;

[0103] S5: The second gasket moving assembly 62 works and drives the gasket unit 43 away from the first winding unit 412 and the second winding unit 413. The first winding unit 412 and the second winding unit 413 are no longer guided and supported by the gasket unit 43 and move closer to the fixed plate 411. At this time, the inside of the battery cell gradually shrinks inwards again along the left and right directions.

[0104] S6: The station switching is completed under the drive of the turntable mechanism 1, and the battery cell unwinding is completed.

[0105] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery cell winding mechanism, comprising a turntable mechanism (1), a reversing mechanism (2) arranged on the turntable mechanism (1), and a driving mechanism (3), characterized in that: Also includes: The winding needle guide mechanism (4) is provided with three groups and is respectively located at the winding station (100), the gluing station (200) and the unloading station (300); The winding needle guide mechanism (4) comprises a winding head assembly (41), a winding head fixing assembly (42) fixedly connected to the winding head assembly (41), a gasket unit (43) arranged outside the winding head assembly (41), a gasket fixing assembly (44) fixedly connected to the gasket unit (43), and a driving assembly (45) connected to the gasket unit (43); The winding head assembly (41) comprises a fixing plate (411), a first winding unit (412) and a second winding unit (413) arranged on the left and right sides of the fixing plate (411); Two groups of the gasket units (43) are provided, and the two groups of the gasket units (43) are respectively provided on the upper and lower sides of the fixing plate (411); Driven by the driving assembly (45) and the gasket fixing assembly (44), the two groups of gasket units (43) can move away from or approach the fixing plate (411) at the same time; When the gasket unit (43) moves toward the position of the winding head assembly (41), the two groups of gasket units (43) will respectively drive the first winding unit (412) and the second winding unit (413) away from the fixed plate (411); when the gasket unit (43) moves away from the position of the winding head assembly (41), the first winding unit (412) and the second winding unit (413) will approach the fixed plate (411); The gasket unit (43) comprises a winding portion (431), an inclined plate portion (432) integrally formed with the winding portion (431), and a flat plate portion (433) connected to the inclined plate portion (432); The first winding unit (412) comprises: A winding plate (4121) is connected to the fixing plate (411) via a plurality of groups of insertion rods (4122); A guide portion (4123) is integrally formed with the winding plate (4121), and the guide portion (4123) is disposed in abutment with the inclined plate portion (432); Buffer springs (4124), the winding plate (4121) being connected to the fixing plate (411) via a plurality of groups of the buffer springs (4124); A plurality of groups of insertion holes (4111) are provided on the side of the fixing plate (411) at positions corresponding to the insertion rods (4122).

2. A battery core winding mechanism according to claim 1, characterized in that: The winding head fixing assembly (42) comprises a fixing joint (421) for fixing the fixing plate (411), a support tube (422) sleeved inside the fixing joint (421), a connecting head (423) fixedly arranged outside the support tube (422), and a connecting ring (424) arranged at the end of the support tube (422).

3. A battery core winding mechanism according to claim 2, characterized in that: The gasket fixing assembly (44) comprises: A fixed block (441) slidably disposed inside the support tube (422); A support plate (442) is arranged at the center of the fixing block (441), and the upper and lower sides of the support plate (442) are respectively connected to the two groups of gasket units (43) via a plurality of connecting springs (443); A sliding rod (444) is slidably disposed on the support tube (422) and fixedly connected to the fixing block (441); a fixing ring (445) is fixedly disposed on the outer side of the sliding rod (444).

4. A battery core winding mechanism according to claim 3, characterized in that: The driving assembly (45) comprises: A bidirectional threaded rod (451) is rotatably disposed on the support plate (442), and two ends of the bidirectional threaded rod (451) are respectively transmission-disposed with the two groups of gasket units (43); A first gear (452) fixedly connected to an end of the bidirectional threaded rod (451); The second gear (453) is transmission-connected with the first gear (452) and is transmission-connected with the first drive unit (454); the first drive unit (454) is fixedly disposed on the support tube (422).

5. A battery core winding mechanism according to any one of claims 3-4, characterized in that: The winding station (100) is provided with a needle threading mechanism (5), the needle threading mechanism (5) comprising a first winding moving assembly (51) for driving the winding needle guide mechanism (4) to move, and a first gasket moving assembly (52) for driving the gasket unit (43) to move.

6. A battery core winding mechanism according to claim 5, characterized in that: The first winding and moving component (51) comprises: A second driving unit (511) is arranged on a supporting base (512); A transmission rod (513) arranged to be in transmission with the second driving unit (511); A movable base (514) is transmission-connected to the transmission rod (513) and is disposed on the supporting base (512); A clamping plate (515) fixedly disposed on the movable base (514) and clamped with the connector (423); The first gasket moving assembly (52) comprises a fixing seat (521) fixedly arranged on the moving base (514), a telescopic unit (522) arranged on the fixing seat (521), and a guide block (523) connected to the telescopic unit (522) and arranged corresponding to the fixing ring (445).

7. A battery core winding mechanism according to claim 6, characterized in that: The glue sticking station (200) is provided with a needle withdrawal mechanism (6), and the needle withdrawal mechanism (6) comprises a second winding moving assembly (61) and a second gasket moving assembly (62) which are independently provided.

8. A battery cell winding method, comprising a battery cell winding mechanism as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1: the needle threading mechanism (5) is in operation, and the first winding moving component (51) will synchronously drive the first gasket moving component (52) when in operation, thereby driving the gasket unit (43) and the winding needle guide mechanism (4) to move toward the winding station (100) at the same time. At this time, the first winding unit (412) and the second winding unit (413) will extend outwards driven by the gasket unit (43); S2: the first driving unit (454) works and drives the bidirectional threaded rod (451) to rotate, thereby adjusting the heights of the two sets of gasket units (43) to appropriate positions; S3: completing the preliminary winding work under the drive of the driving mechanism (3), and completing the workstation switching under the drive of the turntable mechanism (1); S4: After the gluing work is completed, first, the first driving unit (454) works and drives the two sets of gasket units (43) to approach the fixing plate (411), at which time, the inside of the battery cell gradually shrinks inwards along the up and down directions; S5: the second gasket moving assembly (62) works and drives the gasket unit (43) away from the first winding unit (412) and the second winding unit (413); the first winding unit (412) and the second winding unit (413) are no longer guided and supported by the gasket unit (43) and move closer to the fixed plate (411); at this time, the interior of the battery cell gradually contracts inwards again along the left-right direction; S6: The workstation switching is completed under the drive of the turntable mechanism (1), and the battery cell unwinding is completed.

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