Battery cell winding device

Abstract

The present application provides a battery cell winding device, which includes a winding assembly for winding a winding material into a battery cell; the winding assembly includes a first winding needle assembly, a second winding needle assembly, and a rotating drive assembly; the first winding needle assembly and the second winding needle assembly both include a winding needle body, and the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly are used to cooperate with each other to clamp the winding material; the rotating drive assembly is transmission-connected to the first winding needle assembly and the second winding needle assembly, and is used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to rotate synchronously to wind the winding material.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing equipment, and in particular to a battery cell winding device. Background Art

[0002] At present, wound cells are widely used in batteries. Special cell winding equipment is required to produce wound cells. In some small and micro electronic devices, small and compact micro batteries are usually required. For example, the cylindrical batteries commonly used in Bluetooth headsets are usually only about 3 mm in diameter. However, the cell winding devices in existing cell winding equipment are usually complex in structure and have high manufacturing costs, making it difficult to manufacture wound cells that are small enough. Summary of the invention

[0003] The main technical problem solved by the present application is to provide a battery cell winding device with a simple and compact structure, which can manufacture a smaller wound battery cell.

[0004] To solve the above technical problems, a technical solution adopted in an embodiment of the present application is: a battery cell winding device, the battery cell winding device includes a winding assembly for winding a winding material into a battery cell; the winding assembly includes a first winding needle assembly, a second winding needle assembly, and a rotating drive assembly; the first winding needle assembly and the second winding needle assembly both include a winding needle body, and the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly are used to cooperate with each other to clamp the winding material; the rotating drive assembly is transmission-connected to the first winding needle assembly and the second winding needle assembly, and is used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to rotate synchronously to wind the winding material.

[0005] Wherein, the first needle winding assembly and the second needle winding assembly both include elastic parts, the elastic part of the first needle winding assembly is used to drive the needle winding body of the first needle winding assembly to move, and the elastic part of the second needle winding assembly is used to drive the needle winding body of the second needle winding assembly to move.

[0006] The winding assembly further comprises a first translation drive assembly and a second translation drive assembly, wherein the first translation drive assembly and the second translation drive assembly are respectively used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to move.

[0007] Among them, the elastic part of the first winding needle assembly and the elastic part of the second winding needle assembly are respectively used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to move to the position for clamping the winding material, and the first translation drive assembly and the second translation drive assembly are respectively used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to be pulled out from the wound battery cell.

[0008] In which, both the first needle winding assembly and the second needle winding assembly include a core shaft, and the needle winding body is installed on the core shaft; the elastic part of the first needle winding assembly and the first translation drive assembly are used to drive the core shaft and the needle winding body of the first needle winding assembly to move axially along the core shaft of the first needle winding assembly, and the elastic part of the second needle winding assembly and the second translation drive assembly are used to drive the core shaft and the needle winding body of the second needle winding assembly to move axially along the core shaft of the second needle winding assembly.

[0009] Among them, the first winding needle assembly and the second winding needle assembly both include a receiver arranged at the end of the core shaft, the receiver of the first winding needle assembly is used to allow the winding needle body of the second winding needle assembly to be inserted, and the receiver of the second winding needle assembly is used to allow the winding needle body of the first winding needle assembly to be inserted, so that the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly form a plug-in structure for clamping the winding material.

[0010] Among them, the rotary drive assembly includes a rotary drive motor, a transmission shaft and two main transmission wheels, the transmission shaft is transmission connected to the rotary drive motor, the two main transmission wheels are coaxially mounted on the transmission shaft and are transmission connected to the core shaft of the first needle winding assembly and the core shaft of the second needle winding assembly respectively; the rotary drive motor is used to drive the core shaft of the first needle winding assembly and the core shaft of the second needle winding assembly to rotate synchronously through the transmission shaft and the two main transmission wheels, thereby driving the winding needle body of the first needle winding assembly and the winding needle body of the second needle winding assembly to rotate synchronously.

[0011] The first translation driving assembly includes a slidable first slide seat and a first shifting block fixed on the first slide seat and used for driving the needle winding body of the first needle winding assembly to move.

[0012] Wherein, the second translation driving assembly includes a slidable third slide seat, and a second shifting block fixed on the third slide seat and used for driving the needle winding body of the second needle winding assembly to move.

[0013] Wherein, the second translation drive assembly also includes a slidable second slide, and the third slide is transmission-connected to the second slide; when the second slide transmits the transmission to the third slide, the movement directions of the second slide and the third slide are opposite.

[0014] Wherein, a limiting rod is provided on the second slide seat, and the limiting rod is aligned with the first slide seat to limit the distance between the first slide seat and the second slide seat.

[0015] Among them, it also includes a moving component which is transmission-connected with the winding component and is used to drive the winding component to move.

[0016] Among them, the moving component includes a mounting plate, a lifting power component and a lifting plate; the winding component is mounted on the lifting plate, the lifting plate is movably mounted on the mounting plate, and the lifting power component is mounted on the mounting plate and is used to drive the lifting plate to move.

[0017] Among them, the winding assembly also includes a base plate and a fixed seat, the base plate is installed on the lifting plate, the fixed seat is installed on the base plate and includes two fixed plates, the first winding needle assembly and the first translation drive assembly are arranged on one of the fixed plates, and the second winding needle assembly and the second translation drive assembly are arranged on the other fixed plate.

[0018] Wherein, the battery cell winding device also includes a limit assembly, which is installed on the bottom plate and is used to adjust the displacement stroke of the winding needle body of the second winding needle assembly.

[0019] Among them, the battery cell winding device also includes a balancing assembly, and the balancing assembly includes a balancing cylinder. The balancing cylinder is installed on the mounting plate, and the driving end of the balancing cylinder is connected to the lifting plate to balance the weight of the lifting plate and the winding assembly.

[0020] Compared with the prior art, the battery cell winding device provided by the above-mentioned preferred embodiment of the present application can achieve the following beneficial effects: (1) The same rotating drive component is used to drive the winding needle bodies of the first winding needle component and the second winding needle component to rotate synchronously based on the corresponding synchronous transmission method, which can effectively prevent the first winding needle component and the second winding needle component from being damaged and improve the quality of winding; (2) A balancing component is used to balance the gravity of the lifting plate and the winding component, so that the load of the moving component is reduced and the response speed is faster; (3) A variety of limiting components are provided, and the insertion and removal operations of the first winding needle component and the second winding needle component can be accurately limited, which effectively improves the processing quality of the battery cell and helps to extend the service life of the first winding needle component and the second winding needle component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a battery cell winding device provided in a preferred embodiment of the present application.

[0022] Figure 2 yes Figure 1 A schematic diagram of the specific structure of the winding assembly in the battery cell winding device is shown.

[0023] Figure 3 yes Figure 1 A schematic axial cross-sectional view of a first winding needle assembly in a battery cell winding device is shown. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0025] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] Figure 1It is a structural schematic diagram of a battery cell winding device 1 provided by a preferred embodiment of the present application, and the battery cell winding device 1 at least includes a winding assembly 10 and a moving assembly 20. The winding assembly 10 is transmission-connected to the moving assembly 20, and the moving assembly 20 is used to drive the winding assembly 10 to move back and forth, such as to perform lifting and lowering movements, so that the winding assembly 10 can switch between a predetermined winding position and a material unloading position; when the winding assembly 10 moves to the winding position, the winding assembly 10 can be used to wind winding materials such as positive and negative electrode sheet materials and diaphragm materials used to manufacture wound battery cells into battery cells; when the battery cell is wound, the winding assembly 10 can be moved to the unloading position to facilitate the removal of the battery cell from the winding assembly 10.

[0028] Please also read Figure 2 The winding assembly 10 may include a base plate 11 , a fixing seat 12 , a first winding needle assembly 13 , a second winding needle assembly 14 , a first translation driving assembly 15 , a second translation driving assembly 16 , and a rotation driving assembly 17 .

[0029] The bottom plate 11 may be in the form of a flat plate, and is preferably mounted on the lifting plate 24 (described below) of the moving assembly 20, and may drive the entire winding assembly 10 to reciprocate, such as lifting, under the drive of the moving assembly 20. The fixing seat 12 preferably includes a base plate 121 and two fixing plates 122, wherein the base plate 121 and the fixing plates 122 may both be in the form of flat plates, and the two fixing plates 122 are vertically connected to the base plate 121 on the same surface of the base plate 121, and the two fixing plates 122 are parallel to each other. The base plate 121 may be fixedly mounted on the bottom plate 11 in parallel with the bottom plate 11, so that the two fixing plates 122 are vertically connected to the bottom plate 11 in the same direction (for example, Figure 1 and Figure 2 shown as above) extension.

[0030] Please also read Figure 3 The first needle winding assembly 13 includes a needle winding housing assembly 131, a needle winding drive assembly 132, a needle winding pin assembly 133, and a needle winding auxiliary stop assembly 134. The needle winding housing assembly 131 preferably includes a connecting seat 131a, a mounting housing 131b, and an end cover 131c, wherein the connecting seat 131a is preferably substantially cylindrical, and one end (e.g. Figure 3 The right end is shown) and is used to connect with a fixing plate 122 (e.g. Figure 1 and Figure 2The fixing plate 122 (shown as being on the left side) is tightly abutted and connected together, so that the first needle winding assembly 13 is installed on the fixing plate 122; a transmission notch 131d is also provided on the side wall of the connecting seat 131a for allowing the driving belt of the rotating drive assembly 17 (to be introduced below) to enter the interior of the connecting seat 131a. The shape of the mounting shell 131b is preferably roughly cylindrical, and an annular connecting flange 131e is convexly provided on the periphery of one axial end thereof. The connecting flange 131e preferably has the same diameter as the connecting seat 131a, and can be tightly abutted and connected to the connecting seat 131a, so that the connecting seat 131a and the mounting shell 131b are connected together and the interiors are interconnected. In other embodiments, the connecting seat 131a and the mounting shell 131b can also be integrally formed. The end cover 131c is preferably installed at the other axial end of the mounting shell 131b (for example Figure 3 The left end is shown in the figure), and the mounting housing 131b is sealed. A cylindrical spring seat 131f is preferably convexly provided on the end surface of the end cover 131c facing the inside of the mounting housing 131b. Further preferably, a slide groove 131g extending along the axial direction thereof is provided on the side wall of the mounting housing 131b, and a detection notch 131h for detecting the position of the winding needle is also provided. The slide groove 131g and the detection notch 131h are preferably respectively provided on opposite sides of the side wall of the mounting housing 131b (for example, Figure 3 As shown, they are arranged on the lower side and the upper side respectively).

[0031] The winding needle drive assembly 132 includes an elastic member 132a, a core shaft 132b, an elastic member stopper 132c, a sleeve 132d, a linkage rod 132e, a secondary transmission wheel 132f and a locking block 132g. The elastic member 132a is preferably a cylindrical helical spring, which is accommodated in the mounting housing 131b and is coaxially arranged in the mounting housing 131b. One end of the elastic member 132a (for example Figure 3The core shaft 132b is roughly cylindrical in shape and is coaxially arranged with the connecting seat 131a and the mounting housing 131b. A part of the shaft section is accommodated in the mounting housing 131b, and another part of the shaft section is accommodated in the connecting seat 131a; and the core shaft 132b is arranged to be able to slide along its axial direction in the connecting seat 131a and the mounting housing 131b, so that a part of the shaft section accommodated in the connecting seat 131a can extend from the connecting seat 131a to the outside. An annular stop flange 132h may be convexly provided on the outer surface of the shaft section of the core shaft 132b located in the mounting housing 131b. The elastic member stopper 132c is roughly annular in shape and is sleeved on the shaft section of the core shaft 132b located in the mounting housing 131b. Figure 3 The elastic member 132a (shown as the right end) is sleeved onto the shaft section of the core shaft 132b in the mounting housing 131b, and the end of the elastic member 132a pushes the elastic member stopper 132c in the direction of the stop flange 132h, so that the elastic member stopper 132c and the stop flange 132h abut against each other. A portion of the elastic member stopper 132c and the stop flange 132h are both placed in the slide groove 131g and can slide back and forth in the slide groove 131g. A slot 132i extending parallel to the axial direction of the core shaft 132b is provided on the side surface of the shaft section of the core shaft 132b accommodated in the connecting seat 131a, and a receiving hole 132j ​​extending along the axial direction of the core shaft 132b is provided in the center of the end of the shaft section of the core shaft 132b accommodated in the connecting seat 131a. The sleeve 132d is preferably cylindrical and mounted on the connection seat 131a. It is fixed relative to the connection seat 131a in the axial direction, but can rotate relative to the connection seat 131a. Figure 3 The right cylinder section shown in FIG. 1 is arranged to extend from one end of the connection seat 131a abutting against the fixing plate 122 and pass through the corresponding fixing plate 122, and a portion of the shaft section of the core shaft 132b accommodated in the connection seat 131a is inserted into the sleeve 132d when extending to the outside, as shown in FIG. Figure 3As shown. The linkage rod 132e is roughly cylindrical, and is preferably arranged so that the axial direction of the linkage rod 132e is consistent with the radial direction of the core shaft 132b. One end of the linkage rod 132e is fixedly connected or embedded in the side wall of the sleeve 132d, and the other end is slidably embedded in the slot 132i, so that the rotation of the sleeve 132d can drive the core shaft 132b to rotate together, and the axial sliding of the core shaft 132b will not be hindered by the sleeve 132d. The auxiliary transmission wheel 132f is installed outside the sleeve 132d and aligned with the transmission notch 131d of the connecting seat 131a, and is used to cooperate with the driving belt to realize the rotation of the sleeve 132d driven by the driving belt. The locking block 132g is installed at the end of the sleeve 132d extending out of the connecting seat 131a to seal the end of the sleeve 132d; the locking block 132g is provided with a through hole (not numbered in the figure) for the receiver 133c (described below) of the winding needle insertion assembly 133 to pass through.

[0032] The winding needle insertion assembly 133 includes a winding needle body 133a, a latch 133b and a receiver 133c. The winding needle body 133a includes an insertion portion and a winding portion (not numbered in the figure), the insertion portion and the winding portion are preferably cylindrical in shape and coaxially connected together, and the diameter of the insertion portion is larger than the diameter of the winding portion. The insertion portion is inserted into the above-mentioned receiving hole 132j, and the latch 133b is arranged at the tail of the insertion portion, and the insertion portion is fixed in the receiving hole 132j, so that the rotation of the core shaft 132b can drive the winding needle body 133a to rotate synchronously. The receiver 133c is preferably fixed on the locking block 132g, and the shape is preferably roughly a hollow cone, the cone bottom portion of which is accommodated inside the sleeve 132d and the locking block 132g, and the cone tip portion passes through the above-mentioned through hole of the locking block 132g to the outside of the sleeve 132d and the locking block 132g. The winding portion of the winding needle body 133a is inserted into the conical tip of the receiver 133c and extends out from it to the outside. Preferably, the conical tip of the receiver 133c can accommodate two identical winding portions and be inserted therein at the same time.

[0033] The winding needle auxiliary limiting assembly 134 may include a bearing 134a, a locking nut 134b, a spacer 134c and a spacer 134d. The bearing 134a is installed inside the connecting seat 131a, and the sleeve 132d is rotatably installed in the connecting seat 131a through the bearing 134a. The locking nut 134b can be sleeved and fixed on one end of the sleeve 132d located inside the connecting seat 131a (for example, Figure 3The spacer 134c is sleeved on the outer surface of the sleeve 132d and is located between the bearing 134a and the locking nut 134b, and can be used to define the relative position of the locking nut 134b and the bearing 134a in the axial direction. The number of spacers 134d can be multiple, and they can be installed at multiple predetermined positions in the connecting seat 131a, such as the position on the inner wall of the connecting seat 131a opposite to the locking nut 134b, the position on the inner wall of the connecting seat 131a close to the auxiliary transmission wheel 132f, etc., to prevent harmful collision or friction between the various components.

[0034] Furthermore, the first needle winding assembly 13 may also include a needle insertion detection assembly 135 for real-time detection of the needle insertion state of the needle winding body 133a. Figure 2 The pin detection component 135 may include a sensor 135a and a sensor bracket 135b. The sensor bracket 135b may be installed on the connecting seat 131a or the mounting shell 131b (preferably installed on the mounting shell 131b in this embodiment). The sensor 135a is installed on the sensor bracket 135b and aligned with the detection notch 131h. The position of the core shaft 132b is detected by detecting the notch 131h (for example, the position of the core shaft 132b can be determined by detecting the position of the stop flange 132h on the core shaft 132b), and then the position of the winding needle body 133a installed on the core shaft 132b is determined, thereby detecting the pin state of the winding needle body 133a.

[0035] The structure of the second needle winding assembly 14 may be the same or substantially the same as that of the first needle winding assembly 13, so it will not be described again here. The second needle winding assembly 14 may be mounted on another fixing plate 122 (e.g. Figure 1 and Figure 2As shown, it is located on the fixed plate 122 on the right side, and the winding part of the winding needle body of the second winding needle assembly 14 (not numbered in the figure) is arranged relative to the winding part of the winding needle body 133a of the first winding needle assembly 13, and the specific arrangement of the relative arrangement enables the winding parts of the winding needle bodies of the first winding needle assembly 13 and the second winding needle assembly 14 to be inserted into the receivers of the second winding needle assembly 14 and the first winding needle assembly 13 respectively, that is, the winding needle insertion operation can be performed; and when the winding parts of the winding needle bodies of the first winding needle assembly 13 and the second winding needle assembly 14 are inserted into the receivers of the second winding needle assembly 14 and the first winding needle assembly 13 respectively, a slit for clamping the winding material can be formed between the two winding parts. When the first needle winding assembly 13 and the second needle winding assembly 14 are inserted into each other in the above manner, the elastic parts of the first needle winding assembly 13 and the second needle winding assembly 14 (such as the above-mentioned elastic parts 132a) can drive the corresponding needle winding bodies to move by the elastic force provided by themselves, and push the corresponding needle winding bodies toward the inside of the receiver of the second needle winding assembly 14 and the receiver of the first needle winding assembly 13 respectively.

[0036] The first translation drive assembly 15 can be installed on the fixed plate 122 where the first needle winding assembly 13 is located, and is used to drive the needle winding body 133a of the first needle winding assembly 13 to move axially. In this embodiment, the first translation drive assembly 15 includes a fixed rod 151, a first cylinder seat 152, a first cylinder 153, a first guide column 154, a first guide sleeve 155, a first slide seat 156, a first shift block 157 and a limit screw 158. These components are preferably arranged on the outer side of the fixed plate 122 for installing the first needle winding assembly 13 and the first translation drive assembly 15 (for example, Figure 1 and Figure 2As shown, it is the left side of the left fixed plate 122). The axial direction of the fixed rod 151 is preferably set to be parallel to the axial direction of the mounting housing 131b of the first needle winding assembly 13. One end of the fixed rod 151 is fixed to the corresponding fixed plate 122, and the other end is connected to the first cylinder seat 152. The first cylinder 153 is installed on the first cylinder seat 152. The first guide column 154 is preferably arranged between the fixed rod 151 and the first needle winding assembly 13. The axial direction of the first guide column 154 is also preferably set to be parallel to the axial direction of the fixed rod 151 and the mounting housing 131b of the first needle winding assembly 13; one end of the first guide column 154 is fixed to the corresponding fixed plate 122, and the other end is fixed to the first cylinder seat 152. The first guide sleeve 155 is slidably installed on the first guide column 154 and can slide along the axial direction of the first guide column 154. The first slide 156 is fixedly mounted on the first guide sleeve 155. The driving end of the first cylinder 153 is directly connected or transmission-connected to the first slide 156, so that the first cylinder 153 can drive the first slide 156 to slide back and forth along the axial direction of the first guide column 154. The first shift block 157 is fixedly mounted on the first slide 156, and extends into the mounting housing 131b through the slide slot 131g provided on the mounting housing 131b of the first needle winding assembly 13, and is inserted between the connecting flange 131e protruding on the mounting housing 131b and the stop flange 132h protruding on the core shaft 132b. In this way, when the driving end of the first cylinder 153 moves toward the outside of the fixed seat 12 (for example, at Figure 1 and Figure 2 When the first cylinder 153 moves toward the inner side of the fixed seat 12 (for example, when the first cylinder 153 moves toward the inner side of the fixed seat 12), the first slide seat 156 and the first shifting block 157 can push the stop flange 132h to move away from the fixed seat 12, and then the winding needle body 133a is pulled out from the aforementioned plug-in state through the core shaft 132b, and the stop flange 132h compresses the elastic member 132a. Figure 1 and Figure 2 When the first cylinder seat 152 moves to the right, the elastic member 132a is no longer compressed, and rebounds under its own elasticity to press against the elastic member stopper 132c, and then drives the winding needle body 133a to move to the inside of the fixed seat 12 through the elastic member stopper 132c, the stop flange 132h and the core shaft 132b, so as to be used for the next winding needle insertion operation. The limit screw 158 can be set on the first cylinder seat 152 to limit the distance that the first slide seat 156 moves to the outside of the fixed seat 12.

[0037] The second translation drive assembly 16 can be installed on the fixed plate 122 where the second needle winding assembly 14 is located, and is used to drive the needle winding body of the second needle winding assembly 14 to move axially. The second translation drive assembly 16 can include a second cylinder 161, a second guide column 162, a second guide sleeve 163, a second slide seat 164, a roller transmission assembly 165, a third guide column 166, a third guide sleeve 167, a third slide seat 168 and a second shift block 169. These components are preferably arranged on the outside of the fixed plate 122 for installing the second needle winding assembly 14 and the second translation drive assembly 16 (for example, Figure 1 and Figure 2 The second guide post 162 and the third guide post 166 are preferably arranged to be parallel to the axial direction of the mounting housing (not numbered in the figure) of the second needle winding assembly 14. One end of the second guide post 162 is fixed to the corresponding fixing plate 122, and the second guide sleeve 163 can be slidably sleeved on the second guide post 162 along the axial direction of the second guide post 162. The second slide seat 164 is fixedly mounted on the second guide sleeve 163. The moving direction of the driving end (not numbered in the figure) of the second cylinder 161 is aligned with the second slide seat 164. When the driving end of the second cylinder 161 moves toward the fixing seat 122 (for example, Figure 1 and Figure 2 When the second slide 164 is moved to the left in the middle (moving to the left in the middle), the second slide 164 can be pressed against, so that the second slide 164 and the second guide sleeve 163 slide toward the fixed seat 12 along the axial direction of the second guide column 162. A limiting cylinder 161a can also be provided at the driving end of the second cylinder 161. The limiting cylinder 161a is preferably axially movably mounted on the driving end of the second cylinder 161 by a threaded assembly method, and can be used to more accurately adjust the accuracy of driving the second slide 164 to slide. The third guide post 166 is arranged between the second guide post 162 and the second needle winding assembly 14. One end of the third guide post 166 is fixed to the corresponding fixed plate 122. The third guide sleeve 167 can be slidably sleeved on the third guide post 166 along the axial direction of the third guide post 166. The third slide seat 168 is fixedly mounted on the third guide sleeve 167. The second shift block 169 is fixedly mounted on the third slide seat 168 and is inserted into the second needle winding assembly 14 in a similar manner to the first shift block 157 of the first translation drive assembly 15 to drive the needle winding body of the second needle winding assembly 14 to the outside direction of the fixed seat 12 (for example, Figure 1 and Figure 2The second slide 164 is preferably moved from the aforementioned plug-in state. Further preferably, a limit rod 164a can be provided on the second slide 164. The limit rod 164a can pass through the fixed seat 12 and align with the first slide 156. It can be used to limit the distance between the first slide 156 and the second slide 164, and prevent the first slide 156 from sliding excessively toward the second slide 164 and causing damage to the first needle winding assembly 13. When the limit rod 164a abuts against the first slide 156, it can prevent the first slide 156 from moving, and can also be used to adjust the position of the first slide 156 and the first needle winding assembly 13. For example, when the second slide 164 moves, it can drive the limit rod 164a to move to a certain position; at this time, if the first slide 156 is moved toward the second slide 164, the first slide 156 will be stopped by the limit rod 164a after moving a certain distance, thereby achieving corresponding position adjustment.

[0038] The roller transmission assembly 165 includes a roller seat 165a, a roller transmission belt 165b, at least two belt fixing blocks 165c and at least two rollers (not shown in the figure). The roller seat 165a is preferably fixed to the ends of the second guide column 162 and the third guide column 166 away from the fixing base 12, and the roller is rotatably accommodated in the roller seat 165a. The roller transmission belt 165b is wound around the roller, and the two ends of the roller transmission belt 165b are respectively fixed to the second slide 164 and the third slide 168 through the belt fixing blocks 165c. In this way, the second slide 164 is connected to the third slide 168 through transmission, and the third slide 168 can be driven by the transmission of the roller transmission belt 165b. Specifically in this embodiment, when the second slide 164 is used to transmit the third slide 168, the sliding directions of the second slide 164 and the third slide 168 are preferably set to be opposite, so that when the second slide 164 slides away from the fixed seat 12, the third slide 168 can be driven by the roller drive belt 165b to slide toward the fixed seat 12, and vice versa.

[0039] The rotary drive assembly 17 preferably includes a rotary drive motor seat 171, a rotary drive motor 172, a driving wheel 173, a first driving belt 174, a transmission shaft 175, a driven wheel 176, two main transmission wheels 177 and two second driving belts 178. The rotary drive motor seat 171 is preferably mounted on the lifting plate 24 (to be described below) of the moving assembly 20, the rotary drive motor 172 is mounted on the rotary drive motor seat 171, the driving wheel 173 is arranged on the driving end of the rotary drive motor 172, the transmission shaft 175 is rotatably mounted on the fixed seat 12, and the driven wheel 176 and the two main transmission wheels 177 are coaxially sleeved on the transmission shaft 175 and fixed relative to the transmission shaft 175. The driving wheel 173 is connected to the driven wheel 176 through the first driving belt 174, and the two main transmission wheels 177 are connected to the auxiliary transmission wheel of the first needle winding assembly 13 and the auxiliary transmission wheel of the second needle winding assembly 14 through the two second driving belts 178. When the rotary drive motor 172 rotates, the driven wheel 176 and the transmission shaft 175 can be driven to rotate through the driving wheel 173 and the first driving belt 174, and further driven through the two main driving wheels 177 and the two second driving belts 178 to synchronously rotate the auxiliary driving wheels of the first needle winding assembly 13 and the auxiliary driving wheels of the second needle winding assembly 14, thereby driving the core shafts and the needle winding bodies of the first needle winding assembly 13 and the second needle winding assembly 14 to synchronously rotate. In this way, the two needle winding bodies of the first needle winding assembly 13 and the second needle winding assembly 14 can be driven to rotate synchronously through the same rotary drive assembly 17, thereby avoiding the phenomenon of asynchronous rotation of the two needle winding bodies.

[0040] The moving assembly 20 may include a mounting plate 21, a lifting power assembly 22, a lifting sliding assembly 23 and a lifting plate 24. The mounting plate 21 is preferably in the shape of a flat plate, which can be installed at a predetermined position and used to carry the entire battery winding device 1. The lifting power assembly 22 preferably includes a lifting motor seat 221, a lifting motor 222, a lifting coupling 223, a lifting screw 224, a lifting screw nut 225, a lifting screw support 226, and a lifting drive block 227. These components are preferably installed on the same surface of the mounting plate 21 (for example, Figure 1 The lifting slide assembly 23 and the lifting plate 24 are preferably mounted on the other side of the mounting plate 21 facing away from the lifting power assembly 22 (eg Figure 1The lifting motor seat 221 and the lifting screw support 226 can be fixedly mounted on the mounting plate 21, and the lifting coupling 223 can be arranged between the lifting motor seat 221 and the lifting screw support 226; the lifting motor 222 is mounted on the lifting motor seat 221, and the driving end of the lifting motor 222 (not shown in the figure) can pass through the lifting motor seat 221 to connect to the lifting coupling 223, and is connected to one end of the lifting screw 224 through the lifting coupling 223; the lifting screw 224 is rotatably inserted into the lifting screw support 226, and the lifting screw nut 225 is sleeved on the lifting screw 224 and fixedly connected to the lifting drive block 227; the mounting plate 21 can be provided with a lifting slot (not shown in the figure) along the predetermined lifting direction of the lifting drive block 227, and the lifting drive block 227 can pass through the mounting plate 21 through the lifting slot and be connected to the lifting plate 24. The lifting sliding assembly 23 may include a slide rail 231 and a slider 232. The slide rail 231 is fixedly mounted on the mounting plate 21, and the sliding direction defined by the slide rail 231 is consistent with the predetermined lifting direction of the lifting drive block 227. The slider 232 is slidably arranged on the slide rail 231, and the lifting plate 24 is connected to the slider 232. In this way, when the lifting motor 222 rotates, its driving end can drive the lifting screw 224 to rotate through the lifting coupling 223. According to the known working principle of the screw, the rotation of the lifting screw 224 can drive the lifting screw nut 225 to move along the axial direction of the lifting screw 224, that is, to rise or fall. The lifting and lowering movement of the lifting screw nut 225 can further drive the lifting drive block 227 to rise or fall along the lifting groove on the mounting plate 21, thereby driving the lifting plate 24 and the winding assembly 10 mounted on the lifting plate 24 to move up and down relative to the mounting plate 21, and moving the winding assembly 10 to the predetermined winding position and unloading position. The lifting and sliding assembly 23 can provide further support and guidance for the movement of the lifting plate 24 , which is beneficial to improving the reliability of the operation of the lifting plate 24 .

[0041] Furthermore, in order to further improve the displacement accuracy of the winding needle body of the second winding needle assembly 14 and make its insertion and extraction position more accurate, the battery cell winding device 1 may also include a limit assembly 30. The limit assembly 30 is preferably installed on the bottom plate 11, and may include a limit motor 31, a limit motor seat 32, a limit coupling 33, a limit screw support 34, a limit screw 35, a limit screw nut 36, a limit drive block 37, a limit block 38, and a guide rod 39. The limit motor seat 32 and the limit screw support 34 are both fixedly arranged on the bottom plate 11, and the number of the limit screw support 34 is preferably two, both of which are installed on the same side of the limit motor seat 32 and arranged in a row with the limit motor seat 32; the guide rod 39 is fixed between the two limit screw supports 34, and the limit coupling 33 can be arranged between the limit motor seat 32 and a limit screw support 34 that is closer to the limit motor seat 32. The limit motor 31 is installed on the limit motor seat 32, and the driving end of the limit motor 31 (not shown in the figure) can pass through the limit motor seat 32 to be connected to the limit coupling 33, and is connected to one end of the limit screw 35 through the limit coupling 33; the limit screw 35 is rotatably inserted into the two limit screw supports 34, the limit screw nut 36 is sleeved on the limit screw 35 and fixedly connected to the limit drive block 37, the limit drive block 37 is slidably mounted on the guide rod 39, the limit block 38 is fixedly mounted on the limit drive block 37, and at least a part of the limit block 38 is arranged on the sliding path of the second slide seat 164. When the limit motor 31 rotates, its driving end can drive the limit screw 35 to rotate through the limit coupling 33; according to the known working principle of the screw, the rotation of the limit screw 35 can drive the limit screw nut 36 to move along the axial direction of the limit screw 35, thereby driving the limit drive block 37 and the limit block 38 to move, so that the limit block 38 can stop the sliding of the second slide 164 within a predetermined range, limit the second slide 164, and thus adjust the displacement stroke of the needle winding body of the second needle winding assembly 14 to improve the displacement accuracy. The guide rod 39 can provide further support and guidance for the movement of the limit drive block 37, which is conducive to improving the reliability of the work of the limit assembly 30.

[0042] In this embodiment, since there are many components installed on the lifting plate 24, in order to make the load on the lifting plate 24 more balanced, the battery cell winding device 1 may further include a balancing assembly 40. The balancing assembly 40 may include a balancing cylinder seat 41, a balancing cylinder 42 and a connecting block 43. The balancing cylinder 42 is mounted on the mounting plate 21 through the balancing cylinder seat 41, and the driving end of the balancing cylinder 42 (not numbered in the figure) is connected to the lifting plate 24 through the connecting block 43. The driving end of the balancing cylinder 42 is always extended to balance the weight of the lifting plate 24 and the winding assembly 10 installed on the lifting plate 24. In this way, the load of the lifting motor 222 can be made smaller and the response speed can be faster.

[0043] When using the above-mentioned battery cell winding device 1 to make wound battery cells, the moving component 20 can be used to drive the winding component 10 to move to a predetermined winding position (if the winding component 10 is already in an appropriate winding position, the moving component 20 can also be used to drive it). At this time, the winding part of the first winding needle component 13 and the winding part of the second winding needle component 14 are respectively placed on both sides of the single-layer or multi-layer winding material (such as a diaphragm material) to be wound; the two winding needle bodies of the first winding needle component 13 and the second winding needle component 14 are driven to rotate synchronously by the rotating drive component 17, so that the two winding needle bodies are adjusted to an ideal working angle, for example, the planes on which the two winding needle bodies are relatively arranged are parallel to the winding material, so as to facilitate the subsequent insertion process. Then, the first translation drive assembly 15 and the second translation drive assembly 16 are used to drive the winding part of the first winding needle assembly 13 and the winding part of the second winding needle assembly 14 to be inserted into each other in accordance with the aforementioned driving method, that is, the winding part of the first winding needle assembly 13 and the winding part of the second winding needle assembly 14 are driven to be inserted into the receiver of the second winding needle assembly 14 and the receiver of the first winding needle assembly 13 respectively, so that the winding needle bodies of the first winding needle assembly 13 and the second winding needle assembly 14 cooperate with each other, and the winding part of the first winding needle assembly 13 and the winding part of the second winding needle assembly 14 are moved to appropriate positions for clamping the winding material, and the winding material to be wound is clamped between the winding part of the first winding needle assembly 13 and the winding part of the second winding needle assembly 14. When performing the above-mentioned insertion operation, it is preferred to first drive the winding part of the second needle winding assembly 14 to be inserted into the receiver of the first needle winding assembly 13, and then drive the winding part of the first needle winding assembly 13 to be inserted into the receiver of the second needle winding assembly 14, so that the first slide 156 can be limited by the limit rod to ensure that the first needle winding assembly 13 and the second needle winding assembly 14 maintain an appropriate distance. The limit assembly 30 can also be used to assist in positioning the second needle winding assembly 14. When the first needle winding assembly 13 and the second needle winding assembly 14 are inserted in the above-mentioned manner, the elastic members (such as the above-mentioned elastic members 132a) of the first needle winding assembly 13 and the second needle winding assembly 14 can drive the corresponding needle winding body to move by the elastic force provided by themselves, and push the corresponding needle winding body against the inside of the receiver of the second needle winding assembly 14 and the receiver of the first needle winding assembly 13 respectively.

[0044] After completing the above-mentioned insertion operation, the rotating drive component 17 is turned on, and the two winding needle bodies of the first winding needle component 13 and the second winding needle component 14 are driven to rotate synchronously according to the above-mentioned action principle, and the single-layer or multi-layer winding material clamped between the two winding parts is wound to form a wound battery cell. After completing the winding operation, the moving component 20 can be used to drive the winding component 10 to move to the predetermined unloading position, clamp the battery cell at the unloading position, and then the first translation driving component 15 and the second translation driving component 16 are driven according to the above-mentioned driving method to perform the needle pulling operation, that is, the winding part of the first winding needle component 13 and the winding part of the second winding needle component 14 are moved in a direction away from the fixed seat 12, and pulled out from the wound battery cell. When performing the needle pulling operation, it is preferred to first drive the first winding needle component 13 to pull the needle, and then drive the second winding needle component 14 to pull the needle; or the first winding needle component 13 and the second winding needle component 14 can also be driven to pull the needle at the same time.

[0045] Preferably, the winding part of the first winding needle assembly 13 and the winding part of the second winding needle assembly 14 can be manufactured into semi-cylindrical shapes that can cooperate with each other. When the two winding parts are inserted into each other, a combined winding needle with a basically cylindrical outer contour can be formed, which helps to improve the winding accuracy.

[0046] Preferably, both the first shift block 157 and the second shift block 169 may adopt cam followers.

[0047] Compared with the prior art, the battery cell winding device 1 provided by the above-mentioned preferred embodiment of the present application can achieve the following beneficial effects: (1) The same rotating drive component 17 is used to drive the winding needle bodies of the first winding needle component 13 and the second winding needle component 14 to rotate synchronously based on the corresponding synchronous transmission method, which can effectively prevent the first winding needle component 13 and the second winding needle component 14 from being damaged and improve the quality of winding; (2) The balancing component 40 is used to balance the gravity of the lifting plate 24 and the winding component 10, so that the load of the moving component 20 is reduced and the response speed is faster; (3) A variety of limiting components are provided, and the insertion and removal operations of the first winding needle component 13 and the second winding needle component 14 can be accurately limited, which effectively improves the processing quality of the battery cell and helps to extend the service life of the first winding needle component 13 and the second winding needle component 14.

[0048] The above are only preferred implementations of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery cell winding device, characterized in that: The battery core winding device comprises: a winding assembly for winding a winding material into a battery core; The winding assembly includes a first winding needle assembly, a second winding needle assembly, and a rotary drive assembly; the first winding needle assembly and the second winding needle assembly both include a winding needle body, the winding needle body includes an insertion portion and a winding portion, the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly are used to cooperate with each other to clamp the winding material; the rotary drive assembly is transmission-connected with the first winding needle assembly and the second winding needle assembly, and is used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to rotate synchronously to wind the winding material; Both the first winding needle assembly and the second winding needle assembly include a receiver arranged at the end of the core shaft, the receiver of the first winding needle assembly is used to allow the winding needle body of the second winding needle assembly to be inserted, and the receiver of the second winding needle assembly is used to allow the winding needle body of the first winding needle assembly to be inserted, so that the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly form a butt-insertion structure for clamping the winding material, and a slit for clamping the winding material is formed between the two winding parts.

2. The battery core winding device according to claim 1, characterized in that: The first needle winding assembly and the second needle winding assembly both include elastic members. The elastic member of the first needle winding assembly is used to drive the needle winding body of the first needle winding assembly to move, and the elastic member of the second needle winding assembly is used to drive the needle winding body of the second needle winding assembly to move.

3. The battery core winding device according to claim 2, characterized in that: The winding assembly further comprises a first translation driving assembly and a second translation driving assembly, wherein the first translation driving assembly and the second translation driving assembly are respectively used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to move.

4. The battery core winding device according to claim 3, characterized in that: The elastic part of the first winding needle assembly and the elastic part of the second winding needle assembly are respectively used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to move to a position for clamping the winding material, and the first translation drive assembly and the second translation drive assembly are respectively used to drive the winding needle body of the first winding needle assembly and the winding needle body of the second winding needle assembly to be pulled out from the wound battery cell.

5. The battery core winding device according to claim 3, characterized in that: Both the first needle winding assembly and the second needle winding assembly include a core shaft, and the needle winding body is mounted on the core shaft; the elastic member of the first needle winding assembly and the first translation drive assembly are used to drive the core shaft and the needle winding body of the first needle winding assembly to move axially along the core shaft of the first needle winding assembly, and the elastic member of the second needle winding assembly and the second translation drive assembly are used to drive the core shaft and the needle winding body of the second needle winding assembly to move axially along the core shaft of the second needle winding assembly.

6. The battery cell winding device according to claim 5, characterized in that: The rotary drive assembly includes a rotary drive motor, a transmission shaft and two main transmission wheels, the transmission shaft is transmission-connected to the rotary drive motor, the two main transmission wheels are coaxially mounted on the transmission shaft and are transmission-connected to the core shaft of the first needle winding assembly and the core shaft of the second needle winding assembly, respectively; the rotary drive motor is used to drive the core shaft of the first needle winding assembly and the core shaft of the second needle winding assembly to rotate synchronously through the transmission shaft and the two main transmission wheels, thereby driving the winding needle body of the first needle winding assembly and the winding needle body of the second needle winding assembly to rotate synchronously.

7. The battery core winding device according to claim 3, characterized in that: The first translation driving assembly includes a slidable first slide seat and a first shifting block fixed on the first slide seat and used for driving the needle winding body of the first needle winding assembly to move.

8. The battery cell winding device according to claim 7, characterized in that: The second translation driving assembly includes a slidable third slide seat and a second shifting block fixed on the third slide seat and used for driving the needle winding body of the second needle winding assembly to move.

9. The battery core winding device according to claim 8, characterized in that: The second translation drive assembly also includes a slidable second slide, and the third slide is transmission-connected to the second slide; when the second slide transmits the transmission to the third slide, the movement directions of the second slide and the third slide are opposite.

10. The battery core winding device according to claim 9, characterized in that: A limiting rod is provided on the second slide seat, and the limiting rod is aligned with the first slide seat to limit the distance between the first slide seat and the second slide seat.

11. The battery core winding device according to claim 1, characterized in that: It also includes a moving component which is transmission-connected with the winding component and is used to drive the winding component to move.

12. The battery core winding device according to claim 11, characterized in that: The moving assembly includes a mounting plate, a lifting power assembly and a lifting plate; the winding assembly is mounted on the lifting plate, the lifting plate is movably mounted on the mounting plate, and the lifting power assembly is mounted on the mounting plate and is used to drive the lifting plate to move.

13. The battery core winding device according to claim 12, characterized in that: The winding assembly also includes a first translation drive assembly, a second translation drive assembly, a base plate and a fixed seat, the base plate is mounted on the lifting plate, the fixed seat is mounted on the base plate and includes two fixed plates, the first winding needle assembly and the first translation drive assembly are arranged on one of the fixed plates, and the second winding needle assembly and the second translation drive assembly are arranged on the other fixed plate.

14. The battery core winding device according to claim 13, characterized in that: The battery cell winding device also includes a limit assembly, which is mounted on the bottom plate and is used to adjust the displacement stroke of the winding needle body of the second winding needle assembly.

15. The battery core winding device according to claim 12, characterized in that: The battery cell winding device also includes a balancing assembly, which includes a balancing cylinder. The balancing cylinder is installed on the mounting plate, and a driving end of the balancing cylinder is connected to the lifting plate to balance the weight of the lifting plate and the winding assembly.

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