Battery cell winding device

Abstract

The present invention relates to a battery cell winding device, comprising a winding mechanism, wherein the winding mechanism comprises: two sets of winding needle assemblies, each of the winding needle assemblies comprises a winding needle hanging plate, a winding needle main shaft rotatably mounted on the winding needle hanging plate, and a winding needle connected to the winding needle main shaft, wherein the two winding needles can cooperate with each other to form a winding shaft for winding a battery cell; and a driving assembly, wherein the driving assembly is respectively connected to the two winding needle main shafts, and the two winding needle main shafts can rotate synchronously under the drive of the driving assembly. The battery cell winding device of the present invention can be well applied to the production of large battery cells, ensuring that the battery cells have high winding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and in particular to a battery core winding device. Background Art

[0002] In the process of winding the battery cells, the traditional battery cell winding device usually adopts a single-axis single-sided driven winding needle to perform the battery cell winding action. This type of battery cell winding device is only suitable for the winding production of small battery cells. For large battery cells, when the diameter of the battery cell increases to a certain value, it is difficult to ensure that the battery cell maintains a uniform constant tension during the winding process, and it is easy to cause problems such as uneven winding flatness and poor stability of the battery cell, thereby affecting the winding quality of the battery cell. Summary of the invention

[0003] Based on this, it is necessary to provide a battery cell winding device that can be well applied to the production of large battery cells and ensure that the battery cells have high winding quality, as traditional battery cell winding devices are difficult to ensure that the battery cells maintain uniform constant tension during the winding process when producing large battery cells, and are prone to causing uneven winding flatness and poor stability of the battery cells.

[0004] A battery core winding device comprises a winding mechanism, wherein the winding mechanism comprises:

[0005] Two sets of winding needle assemblies, each of which includes a winding needle hanging plate, a winding needle main shaft rotatably mounted on the winding needle hanging plate, and a winding needle connected to the winding needle main shaft, and the two winding needles can cooperate with each other to form a winding shaft for winding a battery cell; and

[0006] A driving assembly is respectively connected to the two winding needle spindles, and the two winding needle spindles can rotate synchronously under the drive of the driving assembly.

[0007] When the above-mentioned battery cell winding device is working, the positive and negative electrode sheets and the diaphragm material of the battery cell are sandwiched between the two winding needles, and the two winding needle main shafts are driven to rotate synchronously through the driving component, thereby driving the two winding needles to rotate synchronously to perform the winding action, thereby realizing the winding of the battery cell. Compared with the traditional battery cell winding device that adopts a single-axis single-sided drive for winding, the winding mechanism of the battery cell winding device of the present invention can realize a set of driving components to realize the dual-drive winding work of the double-needle winding, so that the winding driving force of the battery cell can be evenly distributed on the double-sided winding needles. In this way, when winding the battery cell (especially for large-diameter battery cells), it can ensure that the battery cell maintains a uniform constant tension during the winding process, so that the battery cell has good winding flatness and stability, thereby effectively improving the winding quality of the battery cell, and can be well applied to the production of large battery cells.

[0008] In one of the embodiments, each of the winding needle assemblies also includes a winding needle sleeve mounted on the winding needle main shaft, the winding needle sleeve is rotatably connected to the winding needle hanging plate, the winding needle main shaft is drivingly connected to the winding needle sleeve, the driving assembly includes a rotating driving member, a linkage main shaft and two sets of synchronous transmission units, the rotating driving member is drivingly connected to the linkage main shaft, the synchronous transmission unit is arranged in a one-to-one correspondence with the winding needle sleeve, and the two ends of the linkage main shaft are respectively transmission-connected to the corresponding winding needle sleeves through the synchronous transmission units.

[0009] In one embodiment, the synchronous transmission unit includes a first synchronous wheel, a second synchronous wheel and a synchronous belt, the synchronous belt is wound around the first synchronous wheel and the second synchronous wheel, the first synchronous wheel is sleeved on the linkage main shaft, and the second synchronous wheel is sleeved on the winding needle shaft sleeve.

[0010] In one embodiment, each winding needle includes a connecting section and a winding section, the connecting section is connected to the winding needle main shaft, the winding section is radially recessed relative to the connecting section to form a groove, and a step is provided at the adjacent portion of the winding section and the connecting end.

[0011] In one embodiment, each of the winding needle assemblies also includes a first linear drive component, the winding needle spindle can be axially slidably inserted into the winding needle sleeve, the first linear drive component is drivingly connected to the winding needle spindle, and the first linear drive component can drive the winding needle spindle to slide axially to drive the winding needle to be pulled out of the battery cell.

[0012] In one embodiment, each of the winding needle assemblies also includes a first linear guide and a needle withdrawal connecting plate, the first linear guide is parallel to the winding needle main shaft, the needle withdrawal connecting plate is slidably connected to the first linear guide, the end of the winding needle main shaft away from the winding needle is rotatably connected to the needle withdrawal connecting plate, and the needle withdrawal connecting plate is drivingly connected to the first linear drive member.

[0013] In one embodiment, the battery cell winding device also includes an auxiliary coring mechanism, which includes a battery cell support assembly and a driving module driven and connected to the battery cell support assembly, wherein the driving module can drive the battery cell support assembly to move to an auxiliary coring station, and at the auxiliary coring station, the battery cell support assembly can hold the battery cell.

[0014] In one embodiment, the battery cell support assembly includes a support seat, a tail wheel rotatably connected to the support seat, and a lifting plate located at the bottom of the support seat, one side of the lifting plate is rotatably connected to the support seat, and the driving module includes a fixed frame, a lifting drive member and a material unloading push rod, the lifting drive member and the material unloading push rod are both installed on the fixed frame, the lifting drive member is drivably connected to the lifting plate, and the lifting drive member can drive the lifting plate to move downward to the unloading station, at which the unloading push rod pushes the support seat to an inclined state.

[0015] In one of the embodiments, a pressure sensor is provided on the battery cell support assembly, and an in-position sensor is provided on the winding needle hanging plate.

[0016] In one of the embodiments, the battery cell winding device also includes a material receiving mechanism, which is located on one side of the unloading station. The material receiving mechanism includes a mounting bracket, a battery cell receiving plate provided on the mounting bracket, and a battery cell baffle provided on one side of the battery cell receiving plate. The battery cell receiving plate is arranged on a side away from the battery cell baffle and close to the finishing wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a battery cell winding device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic structural diagram of a winding mechanism of a cell winding device;

[0019] Figure 3 for Figure 2 A partial structural diagram of the winding mechanism in FIG.

[0020] Figure 4 for Figure 1 A schematic structural diagram of an auxiliary coring mechanism of a battery cell winding device;

[0021] Figure 5 for Figure 1 A schematic structural diagram of a material receiving mechanism of a cell winding device;

[0022] Figure 6 It is a schematic diagram of the coordination between the auxiliary coring mechanism and the material receiving mechanism;

[0023] Figure 7 for Figure 1 Schematic diagram of the structure of the winding needle of the battery cell winding device.

[0024] 10. Frame, 11. Second linear guide, 12. Second linear drive, 13. Fixed plate, 14. Push plate, 15. Limit switch, 20. Winding mechanism, 21. Needle winding assembly, 211. Needle winding hanging plate, 2111. In-position sensor, 212. Needle winding spindle, 213. Needle winding, 2131. Connecting section, 2132. Winding section, 2133. Step, 214. Needle winding sleeve, 215. First linear drive, 216. First linear guide, 217. Needle withdrawal connecting plate, 218. Needle withdrawal connecting block, 219. Slider, 22. Drive Dynamic component, 221, rotating drive member, 222, linkage main shaft, 223, coupling, 224, synchronous transmission unit, 2241, first synchronous wheel, 2242, second synchronous wheel, 2243, synchronous belt, 30, auxiliary coring mechanism, 31, support seat, 32, tail wheel, 33, lifting plate, 34, rotating shaft, 35, fixing frame, 36, lifting drive member, 37, unloading ejector rod, 38, guide shaft, 39, pressure sensor, 40, material receiving mechanism, 41, mounting bracket, 42, battery cell receiving plate, 43, battery cell baffle, 100, battery cell. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal" and similar expressions used herein are for illustrative purposes only. The "first" and "second" described in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0027] Please combine Figures 1 to 3A battery cell winding device includes a frame 10 and a winding mechanism 20 disposed on the frame 10. The winding mechanism 20 includes a winding needle assembly 21 and a driving assembly 22. The winding needle assembly 21 includes two sets, and the two sets of winding needle assemblies 21 are relatively arranged on the frame 10. Each winding needle assembly 21 includes a winding needle hanging plate 211, a winding needle main shaft 212 rotatably mounted on the winding needle hanging plate 211, and a winding needle 213 connected to the winding needle main shaft 212. The two winding needles 213 can cooperate with each other to form a winding shaft for winding the battery cell 100. The driving assembly 22 is respectively connected to the two winding needle main shafts 212, and the two winding needle main shafts 212 can rotate synchronously under the drive of the driving assembly 22.

[0028] Specifically, the frame 10 is used to form a main support and installation structure, and the frame 10 can be made of aluminum profiles or stainless steel. Figure 2 As shown, two winding needle hanging plates 211 are arranged opposite to each other, two winding needles 213 are located between the two winding needle hanging plates 211, and the two winding needles 213 extend toward each other in the horizontal direction, and the two winding needles 213 can overlap each other in the vertical direction. The positive and negative electrodes and the diaphragm material of the battery cell 100 can be clamped by the cooperation of the two winding needles 213. The driving component 22 can simultaneously drive the two winding needle spindles 212 to rotate synchronously, and the winding needle spindles 212 can drive the winding needles 213 to rotate together. In this way, the winding action of the battery cell 100 can be realized by the synchronous rotation of the two winding needles 213. Among them, the shape of the winding needle 213 can be set according to the shape of the battery cell 100 to be produced, and a square winding needle 213 or a round winding needle 213 can be selected.

[0029] When the above-mentioned battery cell winding device is working, the positive and negative electrode plates and the diaphragm material of the battery cell 100 are clamped between the two winding needles 213, and the two winding needle spindles 212 are driven to rotate synchronously through the driving component 22, thereby driving the two winding needles 213 to rotate synchronously to perform the winding action, thereby realizing the winding of the battery cell 100. Compared with the traditional battery cell winding device that adopts single-axis single-sided drive for winding, the winding mechanism 20 of the battery cell winding device of the present invention can realize a set of driving components 22 to realize the dual-drive winding work of the double winding needles 213, so that the winding driving force of the battery cell 100 can be evenly distributed on the double-sided winding needles 213. In this way, when winding the battery cell 100 (especially for the battery cell 100 with a large diameter), it can be ensured that the battery cell 100 maintains a uniform constant tension during the winding process, so that the battery cell 100 has good winding flatness and stability, thereby effectively improving the winding quality of the battery cell 100, and can be well suitable for the production of large battery cells 100.

[0030] Please refer to Figure 2In one embodiment, each winding needle assembly 21 also includes a winding needle sleeve 214 sleeved on the winding needle main shaft 212, the winding needle sleeve 214 is rotatably connected to the winding needle hanging plate 211, the winding needle main shaft 212 is transmission-connected to the winding needle sleeve 214, the driving assembly 22 includes a rotating driving member 221, a linkage main shaft 222 and two sets of synchronous transmission units 224, the rotating driving member 221 is drivingly connected to the linkage main shaft 222, the synchronous transmission unit 224 is arranged in a one-to-one correspondence with the winding needle sleeve 214, and the two ends of the linkage main shaft 222 are respectively transmission-connected to the corresponding winding needle sleeve 214 through the synchronous transmission unit 224.

[0031] Specifically, one end of the winding needle sleeve 214 can be rotatably connected to one side of the winding needle hanging plate 211 through a bearing, the winding needle main shaft 212 is inserted in the winding needle sleeve 214, one end of the winding needle 213 is connected to the winding needle main shaft 212, and the other end extends to a side away from the winding needle sleeve 214, and the winding needle main shaft 212 and the winding needle sleeve 214 can be connected by key connection or tooth connection, so that the winding needle main shaft 212 and the winding needle 213 can rotate synchronously with the winding needle sleeve 214. Optionally, the linkage main shaft 222 is arranged in parallel with the winding needle 213, and the two ends of the linkage main shaft 222 are rotatably connected to the two winding needle hanging plates 211 through bearings, and the two winding needle hanging plates 211 play a certain supporting role on the linkage main shaft 222, which can effectively avoid radial runout of the linkage main shaft 222 during rotation, so as to ensure the rotation stability of the linkage main shaft 222.

[0032] The rotating driving member 221 is fixed to one of the winding needle hanging plates 211. The driving shaft of the rotating driving member 221 can be connected to the linkage main shaft 222 through the coupling 223. The two ends of the linkage main shaft 222 are connected to the corresponding winding needle sleeves 214 through the synchronous transmission unit 224. When the driving member is running, it can drive the linkage main shaft 222 to rotate, and then the two winding needle sleeves 214 can rotate synchronously under the drive of the synchronous transmission unit 224, so that the two-sided winding needles 213 can be driven at the same time. The rotating driving member 221 can be a rotating motor, a rotating cylinder or other driving mechanism that can output a torque. In this embodiment, the rotating driving member 221 is preferably a servo motor, and the servo motor can realize precise control of the rotation speed, further improving the winding accuracy. The synchronous transmission unit 224 includes but is not limited to synchronous belt pulley transmission, worm gear transmission, etc.

[0033] In a specific embodiment, the synchronous transmission unit 224 includes a first synchronous wheel 2241, a second synchronous wheel 2242 and a synchronous belt 2243. The synchronous belt 2243 is wound around the first synchronous wheel 2241 and the second synchronous wheel 2242. The first synchronous wheel 2241 is sleeved on the linkage main shaft 222, and the second synchronous wheel 2242 is sleeved on the winding needle shaft sleeve 214. The rotary drive member 221 drives the linkage main shaft 222 to rotate, thereby driving the first synchronous wheel 2241 to rotate. The first synchronous wheel 2241 can drive the second synchronous wheel 2242 to rotate via the synchronous belt 2243, and then drive the winding needle shaft sleeve 214 to rotate via the second synchronous wheel 2242. The transmission structure is simple and the transmission is reliable.

[0034] For further information, please refer to Figure 7 Each winding needle 213 includes a connecting section 2131 and a winding section 2132. The connecting section 2131 is connected to the winding needle main shaft 212. The winding section 2132 is radially recessed relative to the connecting section 2131 to form a groove. A step 2133 is provided at the adjacent portion between the winding section 2132 and the connecting end. Specifically, the winding needle 213 is generally in a stepped shaft structure, such as Figure 2 As shown, when the two winding needles 213 cooperate with each other, the winding section 2132 of one of the winding needles 213 can be accommodated in the groove of the other winding needle 213, and the end of each winding needle 213 can be overlapped on the step 2133 of the other winding needle 213. In this way, a certain gap is formed in the middle of the winding axis formed by the two winding needles 213 to facilitate the clamping of the positive and negative electrodes and the diaphragm material of the battery cell 100 in the feed, and to facilitate the needle withdrawal action after the battery cell 100 is wound.

[0035] In order to facilitate the removal of the needle and the core after the winding is completed, each winding needle assembly 21 further includes a first linear drive component 215, and the winding needle main shaft 212 can be axially slidably inserted into the winding needle sleeve 214. The first linear drive component 215 is drivingly connected to the winding needle main shaft 212. The first linear drive component 215 can drive the winding needle main shaft 212 to slide axially to drive the winding needle 213 to be removed from the battery cell 100. Specifically, a connection key may be provided on one of the winding needle sleeve 214 and the winding needle main shaft 212, and a key slot adapted to the connection key may be provided on the other, and the key slot extends along the axial direction of the winding needle main shaft 212. In this way, during the winding operation, the winding needle main shaft 212 may rotate synchronously with the winding needle sleeve 214. After the winding is completed, the winding needle main shaft 212 is driven by the first linear drive member 215 to drive the winding needle 213 to move in a direction away from the other winding needle 213, so that the winding needle 213 can be pulled out of the battery cell 100. The movement of the first linear drive member 215 can realize the automatic needle extraction action, which saves time and effort. The first linear drive member 215 includes but is not limited to a linear cylinder, a hydraulic cylinder or an electric push rod. For example, in this embodiment, the first linear drive member 215 is a square cylinder.

[0036] Furthermore, each winding needle assembly 21 further includes a first linear guide rail 216 and a needle withdrawal connecting plate 217. The first linear guide rail 216 is parallel to the winding needle main shaft 212. The needle withdrawal connecting plate 217 is slidably connected to the first linear guide rail 216. The end of the winding needle main shaft 212 away from the winding needle 213 is rotatably connected to the needle withdrawal connecting plate 217. The needle withdrawal connecting plate 217 is drivingly connected to the first linear driving member 215. The needle withdrawal connecting plate 217 is driven to move by the first linear driving member 215. The needle withdrawal connecting plate 217 can drive the winding needle main shaft 212 to move toward the side away from the winding needle hanging plate 211, thereby pulling the winding needle 213 out of the battery cell 100, and during the needle withdrawal process, the needle withdrawal connecting plate 217 can slide along the first linear guide rail 216. Through the sliding cooperation between the first linear guide rail 216 and the needle withdrawal connecting plate 217, the movement of the winding needle main shaft 212 can be well guided, and the movement of the winding needle main shaft 212 can be made more stable, so as to ensure the movement stability of the winding needle 213 during the needle withdrawal process, so as to prevent damage to the battery cell 100 and ensure the quality of the battery cell 100. Optionally, a needle withdrawal connecting block 218 is fixed on the needle withdrawal connecting plate 217, and the end of the winding needle main shaft 212 is rotatably connected to the needle withdrawal connecting block 218. Of course, the needle withdrawal connecting plate 217 and the needle withdrawal connecting block 218 can also be integrally formed. The needle withdrawal connecting plate 217 can be slidably connected to the first linear guide rail 216 through the slider 219, or the needle withdrawal connecting plate 217 can be integrally formed with the slider 219.

[0037] In addition, in order to facilitate the subsequent coring operation, the coring station of the battery core winding device can be arranged outside the frame 10. Figure 1 As shown, in order to enable the winding mechanism 20 to drive the battery cell 100 to move to the coring station, a second linear guide 11 and a second linear drive 12 are provided on the frame 10, and the winding mechanism 20 can be slidably mounted on the second linear guide 11, and the second linear drive 12 is drivingly connected to the winding mechanism 20, and the second linear drive 12 can drive the winding mechanism 20 to move to the coring station. When the winding mechanism 20 completes the winding, gluing and other actions of the battery cell 100, the driving assembly 22 stops driving, and the second linear drive 12 can drive the winding mechanism 20 to move along the second linear guide 11 until the battery cell 100 on the winding shaft is in the coring station. The second linear drive 12 includes but is not limited to a linear cylinder, an electric push rod, etc.

[0038] Specifically, Figure 1As shown, in one embodiment. The second linear guide 11 extends longitudinally, the second linear guide 11 is perpendicular to the first linear guide 216, the second linear drive 12 adopts a square cylinder, the second linear drive 12 is installed on the frame 10 through the fixing plate 13, the end of the piston rod of the second linear drive 12 is connected to one of the winding needle hanging plates 211 through the push plate 14, and a limit switch 15 is also provided on the frame 10. The push plate 14 and the winding needle hanging plate 211 are driven by the second linear drive 12, so that the winding mechanism 20 can move along the second linear guide 11 as a whole, and stop moving when touching the limit switch 15, so as to ensure that the battery cell 100 is just located at the coring station, so as to facilitate the subsequent needle extraction and coring operation.

[0039] In addition, after completing the winding of the battery cell 100, the traditional battery cell winding device usually adopts a direct needle extraction method to complete the needle extraction action of the battery cell 100. For large battery cells 100, due to their large radial diameter and large weight, during the needle extraction process, the friction between the surface of the winding needle and the contact surface of the battery cell 100 is large, and a large force is required to pull the winding needle out of the battery cell 100, making the needle extraction action very difficult. After the winding needle is extracted, the flatness of the surface of the battery cell 100 is difficult to guarantee, which seriously affects the quality of the battery cell 100.

[0040] To solve the problem of needle extraction difficulty, please combine Figure 1 and Figure 4 In one embodiment, the battery cell winding device further includes an auxiliary coring mechanism 30, which includes a battery cell support assembly and a driving module connected to the battery cell support assembly. The driving module can drive the battery cell support assembly to move to the auxiliary coring station, where the battery cell support assembly can hold the battery cell 100. When the winding is completed, the driving module drives the battery cell support assembly to move to the auxiliary coring station, where the battery cell support assembly is just located below the battery cell 100 and can hold the battery cell 100, so that the weight of the battery cell 100 is transferred to the battery cell support assembly, thereby eliminating the friction between the battery cell 100 and the winding needle 213 due to the weight of the battery cell 100 itself. In this way, only a small force is required to remove the winding needle 213 from the battery cell 100, which can effectively improve the needle extraction efficiency and ensure the quality of the battery cell 100 after extraction.

[0041] After the needle extraction action is completed, the battery cell 100 needs to be transferred to the unloading station for unloading. In order to facilitate the unloading of the battery cell 100, further, as Figure 4As shown, the battery cell support assembly includes a support seat 31, a tail wheel 32 rotatably connected to the support seat 31, and a lifting plate 33 located at the bottom of the support seat 31, one side of the lifting plate 33 is rotatably connected to the support seat 31, and the driving module includes a fixed frame 35, a lifting drive member 36 and a material unloading push rod 37, the lifting drive member 36 and the material unloading push rod 37 are both installed on the fixed frame 35, the lifting drive member 36 is drivingly connected to the lifting plate 33, the lifting drive member 36 can drive the lifting plate 33 to move downward to the unloading station, at the unloading station, the unloading push rod 37 pushes the support seat 31 to an inclined state.

[0042] Specifically, the tail wheel 32 can be a roller or a rolling wheel arranged on the top of the support seat 31. The lifting plate 33 and the support seat 31 can be rotatably connected through a rotating shaft 34, and the width of the support seat 31 is slightly larger than the width of the lifting plate 33. The unloading push rod 37 extends vertically, and the top end of the unloading push rod 37 is opposite to the part of the support seat 31 protruding from the lifting plate 33. When the winding is completed, the lifting drive 36 drives the lifting plate 33 and the support seat 31 to move upward to the auxiliary core-taking station. At this time, the support seat 31 and the lifting plate 33 are both in a horizontal state, and the battery cell 100 can be supported by the tailing wheel 32; then the needle withdrawal action is performed. When the winding needle 213 is completely pulled out of the battery cell 100, the lifting drive 36 drives the lifting plate 33 and the support seat 31 to move downward, and the battery cell 100 located on the tailing wheel 32 also moves downward until it moves to the unloading station. At this time, the top of the unloading push rod 37 can push the support seat 31 to an inclined state, so that the battery cell 100 can automatically roll from the tailing wheel 32 to the material receiving station, thereby completing the automatic unloading action of the battery cell 100. By setting the tail wheel 32 on the support seat 31, there is rolling friction between the tail wheel 32 and the battery cell 100, and the friction force is small, which facilitates the battery cell 100 to slide from the support seat 31 to the receiving station; and by setting the tail wheel 32, it can be avoided that the surface of the battery cell 100 is damaged due to excessive friction between the battery cell 100 and the support seat 31 during the unloading process, so as to further ensure the quality of the battery cell 100. Among them, the lifting drive member 36 includes but is not limited to a linear cylinder, an electric push rod, etc. For example, in this embodiment, the lifting drive member 36 is a circular cylinder. Optionally, two or more unloading push rods 37 are provided to ensure that the weight of large-sized battery cells 100 can be withstood.

[0043] Optionally, the driving module further includes a guide shaft 38 extending vertically, and the fixing frame 35 is provided with an axis hole slidably matched with the guide shaft 38, and the upper end of the guide shaft 38 is fixedly connected to the lifting plate 33. The guide shaft 38 can play a good guiding role in the lifting movement of the lifting plate 33, thereby ensuring the lifting stability of the battery cell 100.

[0044] Furthermore, a pressure sensor 39 is provided on the battery cell support assembly, and an in-position sensor 2111 is provided on the winding needle hanging plate 211. When the lifting drive 36 drives the closing wheel 32 to move upward to support the battery cell 100, the switches of the pressure sensor 39 and the in-position sensor 2111 are triggered, and the lifting drive 36 stops moving. The pressure sensor 39 and the in-position sensor 2111 can be used to detect in real time whether the closing wheel 32 supports the battery cell 100, so as to ensure the smooth progress of the entire coring and unloading action. Among them, the in-position sensor 2111 can be a laser sensor, a photoelectric sensor, etc.

[0045] Furthermore, please combine Figure 5 and Figure 6 The cell winding device also includes a receiving mechanism 40, which is located at one side of the unloading station. The receiving mechanism 40 includes a mounting bracket 41, a cell receiving plate 42 disposed on the mounting bracket 41, and a cell baffle 43 disposed on one side of the cell receiving plate 42. The cell receiving plate 42 is disposed close to the tail wheel 32 on the side away from the cell baffle 43. When the lifting drive member 36 drives the lifting plate 33 to move downward to the unloading station, the support seat 31 rotates to an inclined state under the pushing action of the unloading ejector rod 37, and the cell 100 on the tail wheel 32 can automatically slide down and be transferred to the cell receiving plate 42 of the receiving mechanism 40, and the cell baffle 43 can prevent the cell 100 from sliding off, so that the automatic receiving action of the cell 100 can be realized. Optionally, the material receiving mechanism 40 further includes a moving module drivingly connected to the mounting bracket 41 . When the material receiving is completed, the moving module can drive the mounting bracket 41 to move to a specified position, thereby realizing automatic transfer of the battery cell 100 .

[0046] Reference Figure 1In a preferred embodiment, the battery cell winding device includes a winding mechanism 20, an auxiliary coring mechanism 30 and a material receiving mechanism 40. The specific implementation methods of the winding mechanism 20, the auxiliary coring mechanism 30 and the material receiving mechanism 40 can refer to the above embodiments. The battery cell winding device can realize a set of driving components 22 through the winding mechanism 20 to realize the dual-drive winding work of the double winding needles 213, so that the winding driving force of the battery cell 100 can be evenly distributed on the double-sided winding needles 213. In this way, when winding the battery cell 100 (especially for the battery cell 100 with a large diameter), it can ensure that the battery cell 100 maintains a uniform constant tension during the winding process, so that the battery cell 100 has good winding flatness and stability to ensure the winding quality of the battery cell 100; after the winding is completed, during the needle withdrawal process, the auxiliary coring mechanism 30 and the material receiving mechanism 40 are used to ensure the winding quality of the battery cell 100. The cell support assembly of the core mechanism 30 can hold the cell 100, so that the weight of the cell 100 is transferred to the cell support assembly, thereby eliminating the friction between the cell 100 and the winding needle 213 due to the weight of the cell 100 itself. In this way, only a small force is needed to remove the winding needle 213 from the cell 100, which can effectively improve the needle extraction efficiency and ensure the quality of the cell 100. After the needle extraction is completed, the auxiliary core extraction mechanism 30 can also automatically transfer the cell 100 to the material receiving mechanism 40, and the cell 100 can be transferred through the material receiving mechanism 40. The above-mentioned cell winding device can realize a series of actions of automatic winding, needle extraction, coring, material unloading and material connection of the battery cell 100, and can realize high-quality and efficient automatic production of cells.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A battery cell winding device, characterized in that: The invention comprises a winding mechanism, wherein the winding mechanism comprises: Two sets of winding needle assemblies, each of which includes a winding needle hanging plate, a winding needle main shaft rotatably mounted on the winding needle hanging plate, and a winding needle connected to the winding needle main shaft, and the two winding needles can cooperate with each other to form a winding shaft for winding the battery core; each of the winding needle assemblies also includes a winding needle shaft sleeve sleeved on the winding needle main shaft, the winding needle shaft sleeve is rotatably connected to the winding needle hanging plate, and the winding needle main shaft is drivingly connected to the winding needle shaft sleeve; and A driving assembly, wherein the driving assembly is connected to the two winding needle spindles respectively, and the two winding needle spindles can rotate synchronously under the drive of the driving assembly; The battery cell winding device also includes an auxiliary coring mechanism, which includes a battery cell support assembly and a driving module connected to the battery cell support assembly. The driving module can drive the battery cell support assembly to move to an auxiliary coring station, where the battery cell support assembly can hold the battery cell.

2. The battery core winding device according to claim 1, characterized in that: The driving assembly includes a rotating driving member, a linkage spindle and two sets of synchronous transmission units. The rotating driving member is drivingly connected to the linkage spindle. The synchronous transmission unit is arranged in a one-to-one correspondence with the winding needle sleeve. The two ends of the linkage spindle are respectively connected to the corresponding winding needle sleeve through the synchronous transmission unit.

3. The battery core winding device according to claim 2, characterized in that: The synchronous transmission unit includes a first synchronous wheel, a second synchronous wheel and a synchronous belt. The synchronous belt is wound around the first synchronous wheel and the second synchronous wheel. The first synchronous wheel is sleeved on the linkage main shaft, and the second synchronous wheel is sleeved on the winding needle shaft sleeve.

4. The battery core winding device according to claim 1, characterized in that: Each of the winding needles comprises a connecting section and a winding section, wherein the connecting section is connected to the winding needle main shaft, the winding section is radially recessed relative to the connecting section, and a step is provided at the adjacent portion between the winding section and the connecting section.

5. The battery core winding device according to any one of claims 2 to 4, characterized in that: Each of the winding needle assemblies also includes a first linear drive component, and the winding needle spindle can be axially slidably inserted into the winding needle sleeve. The first linear drive component is drivingly connected to the winding needle spindle. The first linear drive component can drive the winding needle spindle to slide axially to drive the winding needle to be pulled out of the battery cell.

6. The battery cell winding device according to claim 5, characterized in that: Each of the needle winding assemblies also includes a first linear guide and a needle withdrawal connecting plate. The first linear guide is parallel to the needle winding main shaft. The needle withdrawal connecting plate is slidably connected to the first linear guide. The end of the needle winding main shaft away from the needle winding is rotatably connected to the needle withdrawal connecting plate. The needle withdrawal connecting plate is drivingly connected to the first linear drive member.

7. The battery cell winding device according to claim 1, characterized in that: The battery cell support assembly includes a support seat, a tail wheel rotatably connected to the support seat, and a lifting plate located at the bottom of the support seat, one side of the lifting plate is rotatably connected to the support seat, and the driving module includes a fixed frame, a lifting drive member and a material unloading ejector rod, the lifting drive member and the material unloading ejector rod are both installed on the fixed frame, the lifting drive member is drivingly connected to the lifting plate, and the lifting drive member can drive the lifting plate to move downward to the unloading station, at which the unloading ejector rod pushes the support seat to an inclined state.

8. The battery cell winding device according to claim 7, characterized in that: The battery cell support assembly is provided with a pressure sensor, and the winding needle hanging plate is provided with an in-position sensor.

9. The battery cell winding device according to claim 7, characterized in that: The battery cell winding device also includes a material receiving mechanism, which is located on one side of the unloading station. The material receiving mechanism includes a mounting bracket, a battery cell receiving plate arranged on the mounting bracket, and a battery cell baffle arranged on one side of the battery cell receiving plate. The battery cell receiving plate is arranged on a side away from the battery cell baffle and close to the finishing wheel.

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