Tab flattening mechanism and battery cell winding equipment

Abstract

The utility model relates to the technical field of battery cell processing equipment, in particular to a tab flattening mechanism and battery cell winding equipment. A tab flattening mechanism comprises a first flattening assembly, a second flattening assembly and a third flattening assembly, the first flattening assembly is used for being arranged on a movement path of a first tab on a first pole piece, and the first flattening assembly can flatten the first tab before the first tab is wound around a winding needle; the second flattening assembly is used for being arranged on a movement path of a second pole lug on a second pole piece, and the second flattening assembly can flatten the second pole lug before the second pole lug is wound on the winding needle; wherein the first tab is one of an anode tab and a cathode tab, and the second tab is the other one of the anode tab and the cathode tab. According to the tab flattening mechanism provided by the invention, the condition that any one of the anode tab and the cathode tab is turned inwards or outwards can be avoided, so that the quality of a battery cell formed by winding is better.

Description

Technical Field

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

[0002] The battery cell winding equipment is a device used for winding and preparing battery cells. Specifically, the battery cell winding equipment usually includes a winding needle, and when the winding needle rotates, the anode electrode sheet, the cathode electrode sheet and the separator are wound up in a certain order to prepare the battery cell.

[0003] However, since an anode ear is usually provided on the anode electrode sheet and a cathode ear is usually provided on the cathode electrode sheet, when the anode electrode sheet and the cathode electrode sheet are wound up by a winding needle, the anode ear provided on the anode electrode sheet will turn inward toward the peripheral wall close to the winding needle or turn outward toward the peripheral wall away from the winding needle. Similarly, the cathode ear provided on the cathode electrode sheet will turn inward toward the peripheral wall close to the winding needle or turn outward toward the peripheral wall away from the winding needle. When the anode ear and the cathode ear turn inward or outward, the quality of the wound battery cell is seriously affected. Utility Model Content

[0004] The present application discloses a tab smoothing mechanism and a battery cell winding device, which can prevent the anode tab and the cathode tab from turning inward or outward, thereby improving the quality of the battery cell formed by winding.

[0005] In order to achieve the above objectives, in a first aspect, the present application discloses a tab smoothing mechanism, comprising:

[0006] A first smoothing component, the first smoothing component is used to be arranged on the movement path of the first pole ear on the first pole piece, and the first smoothing component can smooth the first pole ear before the first pole ear is wound on the winding needle;

[0007] A second smoothing component, the second smoothing component is used to be arranged on the movement path of the second pole ear on the second pole piece, and the second smoothing component can smooth the second pole ear before the second pole ear is wound on the winding needle;

[0008] The first electrode tab is one of an anode electrode tab and a cathode electrode tab, and the second electrode tab is the other of the anode electrode tab and the cathode electrode tab.

[0009] Optionally, the first smoothing component comprises:

[0010] The first smoothing plate is used to be arranged at the winding position of the first pole tab and can contact with a side of the peripheral wall of the first pole tab away from the winding needle to smooth the first pole tab.

[0011] Optionally, the first caressing plate comprises:

[0012] The first guide segment;

[0013] A first smoothing section, the first guide section and the first smoothing section are arranged in sequence along the winding direction of the first pole ear and are connected to each other, the first smoothing section is used to contact a side of the peripheral wall of the first pole ear away from the winding needle to smooth the first pole ear, the first guide section is inclined along a first direction gradually away from the winding needle, and the first direction is opposite to the winding direction of the first pole ear.

[0014] Optionally, the second smoothing component comprises:

[0015] The second smoothing plate is used to be arranged at the winding position of the second pole tab and can contact with a side of the peripheral wall of the second pole tab away from the winding needle to smooth the second pole tab.

[0016] Optionally, the second smoothing component further includes:

[0017] A third smoothing plate is located between the second smoothing plate and the first smoothing assembly. The third smoothing plate and the first smoothing assembly are used together to smooth the first pole tab before the first pole tab is wound on a winding needle.

[0018] Optionally, the third caressing plate is arranged on the second caressing plate.

[0019] Optionally, the second smoothing plate is swingably connected to the first smoothing component to adjust an angle between the second smoothing plate and the first smoothing component.

[0020] Optionally, the tab smoothing mechanism further comprises:

[0021] Mobile drive mechanism;

[0022] A moving component, wherein the moving component is arranged on the moving driving mechanism, the first smoothing component and the second smoothing component are both arranged on the moving component, and the moving driving mechanism is used to drive the moving component to move, so as to synchronously drive the first smoothing component and the second smoothing component to move to the movement path of the first pole ear and the movement path of the second pole ear respectively.

[0023] Optionally, the tab smoothing mechanism further comprises:

[0024] The film-joining component is arranged on the moving component, and the moving drive mechanism is also used to drive the moving component to move towards the direction close to the winding needle.

[0025] Optionally, the tab smoothing mechanism further comprises:

[0026] A swinging member, the swinging member is swingably disposed on the moving assembly, and the first smoothing assembly and the second smoothing assembly are both disposed on the swinging member;

[0027] A swinging driving member, wherein the swinging driving member is arranged on the moving component and connected to the swinging member, and the swinging driving member is used to drive the swinging member to swing relative to the moving component to drive the first smoothing component and the second smoothing component to swing away from or close to the winding needle.

[0028] In a second aspect, the present application discloses a battery cell winding device, which includes the tab smoothing mechanism described in any one of the first aspects above.

[0029] Compared with the prior art, the beneficial effects of this application are:

[0030] In the present application, by setting up a first smoothing component and a second smoothing component, and making the first smoothing component set on the movement path of the first pole ear on the first pole piece and the second smoothing component set on the movement path of the second pole ear on the second pole piece, the first pole ear and the second pole ear can be smoothed at the same time, thereby preventing either the first pole ear or the second pole ear from turning inward or outward.

[0031] On this basis, no matter the first pole ear is the anode pole ear or the cathode pole ear, and no matter the second pole ear is the anode pole ear or the cathode pole ear, both the anode pole ear and the cathode pole ear can be smoothed under the action of the first smoothing component and the second smoothing component, thereby avoiding the situation where either the anode pole ear or the cathode pole ear is turned inward or outward, so that the quality of the wound battery cell is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the structure of a battery cell provided in an embodiment of the present application;

[0034] Figure 2 yes Figure 1 A bottom view of the battery cell in FIG.

[0035] Figure 3 It is a structural schematic diagram of a tab smoothing mechanism provided in an embodiment of the present application;

[0036] Figure 4 yes Figure 3 A schematic diagram of the structure of the tab smoothing mechanism in another perspective;

[0037] Figure 5 It is a structural schematic diagram of a battery cell winding device provided in an embodiment of the present application;

[0038] Figure 6 It is a structural schematic diagram of another tab smoothing mechanism provided in an embodiment of the present application.

[0039] Description of main reference numerals

[0040] 1-first smoothing component; 10-guide gap; 11-first smoothing plate; 111-first guide section; 112-first smoothing section;

[0041] 2-second smoothing assembly; 21-second smoothing plate; 22-third smoothing plate;

[0042] 3-mobile drive mechanism;

[0043] 4-moving assembly; 41-moving plate; 42-first connecting plate; 43-second connecting plate; 44-third connecting plate;

[0044] 5-Membrane parts;

[0045] 6-swinging piece;

[0046] 7-swing drive member;

[0047] 100-Pole ear smoothing mechanism; 200-Battery cell winding equipment;

[0048] A-first pole piece; B-second pole piece; C-winding needle; D1-anode pole piece; D11-anode tab; D2-cathode pole piece; D21-cathode tab; F1-first direction; G-diaphragm. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0051] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0052] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0054] Before explaining the technical solution of the present application, the technical background of the present application is first explained.

[0055] The battery cell winding device 200 is a device for winding and preparing battery cells. Specifically, the battery cell winding device 200 generally includes a winding needle C, and the winding needle C winds up the anode electrode sheet D1, the cathode electrode sheet D2 and the separator G in a certain order when rotating to prepare the battery cell.

[0056] However, see Figure 1 and Figure 2 Since the anode electrode sheet D1 is usually provided with an anode electrode tab D11 and the cathode electrode sheet D2 is usually provided with a cathode electrode tab D21, when the anode electrode sheet D1 and the cathode electrode sheet D2 are wound up by a winding needle, the anode electrode tab D11 provided on the anode electrode sheet D1 will turn inward toward the peripheral wall close to the winding needle or turn outward toward the peripheral wall away from the winding needle ( Figure 2Similarly, the cathode tab D21 disposed on the cathode electrode sheet D2 may turn inward toward the peripheral wall close to the winding needle or turn outward toward the peripheral wall away from the winding needle ( Figure 2 When the anode tab D11 and the cathode tab D21 are turned inside out or outside out, the quality of the wound battery cell is seriously affected. Therefore, a tab smoothing mechanism 100 is urgently needed to solve the above problem.

[0057] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0058] This embodiment provides a tab smoothing mechanism 100, which can solve the problem of the anode tab D11 and the cathode tab D21 turning inward or outward. Figure 3 , Figure 4 and Figure 5 The tab smoothing mechanism 100 comprises: a first smoothing component 1 and a second smoothing component 2, wherein the first smoothing component 1 is used for setting a first tab (not shown in the figure) on a first pole piece A. Figure 5 In the motion path of the first pole ear (in the perspective view, the first pole ear coincides with the first pole piece A), the first smoothing component 1 can smooth the plane where the first pole ear is located to be coplanar with the plane where the first pole piece A is located before the first pole ear is wound on the winding needle C, and the second smoothing component 2 is used for the second pole ear (not shown in the figure, in the second pole piece B) arranged on the second pole piece Figure 5 From the perspective of the movement path where the second pole ear coincides with the second pole piece B), the second smoothing component 2 can smooth the plane where the second pole ear is located to be coplanar with the plane where the second pole piece B is located before the second pole ear is wound on the winding needle C.

[0059] The first electrode tab is one of the anode electrode tab D11 and the cathode electrode tab D21, and the second electrode tab is the other of the anode electrode tab D11 and the cathode electrode tab D21.

[0060] In the present embodiment, as the first pole piece A is gradually wound around the winding needle C, the first pole piece A will also drive the first pole ear arranged on the first pole piece A to be gradually wound around the winding needle C. Since the first smoothing component 1 is arranged on the movement path of the first pole ear on the first pole piece A, before the first pole ear is gradually wound around the winding needle C, the first smoothing component 1 can smooth the plane where the first pole ear is located to be coplanar with the plane where the first pole piece A is located, that is, the first smoothing component 1 can smooth the first pole ear. In this way, the first pole ear can be prevented from turning inward toward the peripheral wall close to the winding needle C or turning outward toward the peripheral wall away from the winding needle C.

[0061] Similarly, as the second pole piece B is gradually wound around the winding needle C, the second pole piece B will also drive the second pole ear arranged on the second pole piece B to be gradually wound around the winding needle C. Since the second smoothing component 2 is arranged on the movement path of the second pole ear on the second pole piece B, before the second pole ear is gradually wound around the winding needle C, the second smoothing component 2 can smooth the plane where the second pole ear is located to be coplanar with the plane where the second pole piece B is located, that is, the second smoothing component 2 can smooth the second pole ear. In this way, it can avoid the second pole ear from turning inward toward the direction close to the winding needle C or turning outward toward the direction away from the winding needle C.

[0062] It can be seen that this embodiment arranges the first smoothing component 1 and the second smoothing component 2, and makes the first smoothing component 1 arranged on the movement path of the first pole ear on the first pole piece A, and the second smoothing component 2 arranged on the movement path of the second pole ear on the second pole piece B, so that the first pole ear and the second pole ear can be smoothed at the same time, thereby avoiding the situation where either the first pole ear or the second pole ear is turned inward or outward.

[0063] On this basis, no matter the first pole lug is the anode pole lug D11 or the cathode pole lug D21, and no matter the second pole lug is the anode pole lug D11 or the cathode pole lug D21, both the anode pole lug D11 and the cathode pole lug D21 can be smoothed under the action of the first smoothing component 1 and the second smoothing component 2, thereby avoiding the situation where either the anode pole lug D11 or the cathode pole lug D21 is turned inward or outward, thereby improving the quality of the wound battery cell.

[0064] It should be noted that the plane where the above-mentioned first pole ear is located and the plane where the first pole piece A is located can be understood in a broad sense to be coplanar. Specifically, when the plane where the first pole ear is located is roughly coplanar with the plane where the first pole piece A is located, it can also be approximately understood that the plane where the first pole ear is located is coplanar with the plane where the first pole piece A is located. This embodiment does not make a narrow limitation on this.

[0065] In some embodiments, see Figure 3 and Figure 5 The first smoothing assembly 1 includes: a first smoothing plate 11, which is used to be arranged at the winding position of the first pole ear and is located on the side of the peripheral wall of the first pole piece A away from the winding needle C ( Figure 5 The first smoothing plate 11 is used to contact the side of the peripheral wall of the first pole ear away from the winding needle C to smooth the plane where the first pole ear is located to be coplanar with the plane where the first pole piece A is located. The winding point of the first pole ear refers to the position of the first pole ear when the first pole ear starts to be wound on the winding needle C.

[0066] Since the first smoothing plate 11 is arranged at the winding entry of the first pole ear and is located on the side of the peripheral wall of the first pole piece A away from the winding needle C, when the first pole ear gradually moves to the winding entry of the first pole ear and starts to be wound on the winding needle C, the first smoothing plate 11 can contact the side of the peripheral wall of the first pole ear away from the winding needle C. In this way, the first smoothing plate 11 can guide the first pole ear and smooth the first pole ear, thereby preventing the first pole ear from turning outward in the direction away from the peripheral wall of the winding needle C.

[0067] The inward turning of the first pole lug can be prevented by the peripheral wall of the winding needle C. Specifically, when the first pole lug is inward turning toward the peripheral wall of the winding needle C, the peripheral wall of the winding needle C can block the first pole lug, so the peripheral wall of the winding needle C can prevent the inward turning of the first pole lug.

[0068] Since the first smoothing plate 11 guides the first electrode tab by contact, the first electrode tab can be smoothed in a simple manner. Therefore, the structure of the first smoothing component 1 can be simplified and the cost of the first smoothing component 1 can be reduced.

[0069] In some embodiments, see Figure 3 and Figure 5 The first smoothing plate 11 includes: a first guiding section 111 and a first smoothing section 112, wherein the first guiding section 111 and the first smoothing section 112 are sequentially arranged along the winding direction of the first pole ear (with the first pole ear Figure 3 The first smoothing section 112 is used to contact the side of the peripheral wall of the first pole ear away from the winding needle C to smooth the plane where the first pole ear is located to be coplanar with the plane where the first pole piece A is located. The first guiding section 111 is inclined along the first direction F1 toward the direction gradually away from the winding needle C ( Figure 5 The first guide section 111 gradually tilts to the left), and the first direction F1 is opposite to the winding direction of the first pole tab.

[0070] Since the first guide segment 111 is inclined along the first direction F1 toward a direction gradually away from the winding needle C, the distance between the first guide segment 111 and the first pole ear can be gradually increased along the first direction F1. Figure 3 The upper end of the first guide segment 111 is the farthest from the first pole lug, so that the first guide segment 111 can have a guiding function while avoiding the collision between the free end of the first guide segment 111 and the first pole lug.

[0071] In some embodiments, see Figure 3 and Figure 5The second smoothing assembly 2 includes: a second smoothing plate 21, which is used to be arranged at the winding position of the second pole ear and is located on the side of the peripheral wall of the second pole piece B away from the winding needle C ( Figure 5 The second smoothing plate 21 is used to contact the side of the peripheral wall of the second pole ear away from the winding needle C to smooth the plane where the second pole ear is located to be coplanar with the plane where the second pole piece B is located. The winding point of the second pole ear refers to the position of the second pole ear when the second pole ear starts to be wound on the winding needle C.

[0072] Since the second smoothing plate 21 is arranged at the winding entry of the second pole ear and is located on the side of the peripheral wall of the second pole piece B away from the winding needle C, when the first pole ear gradually moves to the winding entry of the second pole ear and starts to be wound on the winding needle C, the second smoothing plate 21 can contact the side of the peripheral wall of the second pole ear away from the winding needle C. In this way, the second smoothing plate 21 can guide the second pole ear and smooth the second pole ear, thereby preventing the second pole ear from turning outward in the direction away from the peripheral wall of the winding needle C.

[0073] Since the second smoothing plate 21 guides the second electrode tab by contact, the second electrode tab can be smoothed in a simple manner. Therefore, the structure of the second smoothing component 2 can be simplified and the cost of the second smoothing component 2 can be reduced.

[0074] The structure of the second caressing plate 21 may be the same as or similar to that of the first caressing plate 11 . For details, reference may be made to the description of the first caressing plate 11 in the above embodiment, which will not be described in detail in this embodiment.

[0075] In some embodiments, see Figure 3 and Figure 5 The second smoothing component 2 also includes: a third smoothing plate 22, which is arranged on the second smoothing plate 21 and located between the second smoothing plate 21 and the first smoothing component 1, and the third smoothing plate 22 and the first smoothing component 1 are used together to smooth the plane where the first pole ear is located to be coplanar with the plane where the first pole piece A is located before the first pole ear is wound on the winding needle C.

[0076] Since the third smoothing plate 22 is arranged on the second smoothing plate 21 and is located between the second smoothing plate 21 and the first smoothing component 1, the third smoothing plate 22 and the first smoothing component 1 can jointly smooth the plane where the first pole ear is located to be coplanar with the plane where the first pole piece A is located before the first pole ear is wound on the winding needle C. That is, in addition to the first smoothing component 1 being able to smooth the first pole ear, the second smoothing plate 21 can also play the role of smoothing the first pole ear, so the first pole ear can be better smoothed.

[0077] When the third smoothing plate 22 and the first smoothing assembly 1 work together to smooth the first pole ear, specifically, see Figure 3 and Figure 5 A guide gap 10 is formed between the third smoothing plate 22 and the first smoothing component 1, and the guide gap 10 is used for the first pole ear to pass through in front of the winding needle C when it is wound. In this way, the third smoothing plate 22 and the first smoothing component 1 can contact the first pole ear from both sides of the first pole ear when the first pole ear passes through the guide gap 10, thereby preventing the first pole ear from turning outward and inward at the same time, thereby better smoothing the first pole ear.

[0078] It should be noted that the third smoothing plate 22 is disposed on the second smoothing plate 21, which is only one possible arrangement of the third smoothing plate 22. In other possible arrangements, the third smoothing plate 22 may also be disposed on the first smoothing component 1, etc., which is not limited in this embodiment.

[0079] In some embodiments, see Figure 3 and Figure 5 The second smoothing plate 21 is swingably connected to the first smoothing component 1 to adjust the angle between the second smoothing plate 21 and the first smoothing component 1.

[0080] By adjusting the angle between the second smoothing plate 21 and the first smoothing assembly 1, when the winding direction of the first pole ear and the winding direction of the second pole ear change, the angle between the second smoothing plate 21 and the first smoothing assembly 1 can be adaptively adjusted, so that the second smoothing plate 21 and the first smoothing assembly 1 can respectively smooth the first pole ear and the second pole ear, thereby making the pole ear smoothing mechanism more flexible and adaptable.

[0081] Among them, the second smoothing plate 21 can be swingably connected to the first smoothing component 1 through a waist-shaped hole, and can also be swingably connected to the first smoothing component 1 through other methods. It only needs to achieve the purpose of adjusting the angle between the second smoothing plate 21 and the first smoothing component 1. This embodiment does not limit the specific implementation method.

[0082] In some embodiments, see Figure 5 and Figure 6 The tab smoothing mechanism 100 also includes: a mobile driving mechanism 3 and a mobile component 4, wherein the mobile component 4 is arranged on the mobile driving mechanism 3, the first smoothing component 1 and the second smoothing component 2 are both arranged on the mobile component 4, and the mobile driving mechanism 3 is used to drive the mobile component 4 to move, so as to synchronously drive the first smoothing component 1 and the second smoothing component 2 to move to the movement path of the first tab and the movement path of the second tab respectively.

[0083] Since the first smoothing component 1 and the second smoothing component 2 are both arranged on the moving component 4, when the mobile driving mechanism 3 drives the moving component 4 to move, it can synchronously drive the first smoothing component 1 and the second smoothing component 2 to move to the movement path of the first pole ear and the movement path of the second pole ear respectively, and thus can play the role of smoothing the first pole ear and the second pole ear at the same time. The first smoothing component 1 and the second smoothing component 2 can share a mobile driving mechanism 3, thereby reducing the cost of the pole ear smoothing mechanism and reducing the volume of the pole ear smoothing mechanism.

[0084] Among them, there are many implementation methods of the above-mentioned mobile drive mechanism 3. In one possible implementation method, the mobile drive mechanism 3 may include a motor and a screw module. The rotating shaft of the motor is connected to the screw of the screw module, and the slider of the screw module is connected to the mobile component 4. In this way, when the rotating shaft of the motor starts to rotate and drives the slider to slide, the purpose of driving the mobile component 4 to move can be achieved.

[0085] Of course, the mobile driving mechanism 3 can also be implemented in other possible ways, as long as it can achieve the purpose of driving the mobile component 4 to move. This embodiment does not limit the specific implementation method.

[0086] See also Figure 6 The above-mentioned moving component 4 may include a moving plate 41, a first connecting plate 42, a second connecting plate 43 and a third connecting plate 44. The moving plate 41, the first connecting plate 42, the second connecting plate 43 and the third connecting plate 44 are sequentially connected to form a U-shaped structure. The moving plate 41 is arranged on the moving driving mechanism 3, and the first smoothing component 1 and the second smoothing component 2 are both arranged on the third connecting plate 44. In this way, the first smoothing component 1 and the second smoothing component 2 can be far away from the moving driving mechanism 3, thereby avoiding or reducing the possibility of the first smoothing component 1 and the second smoothing component 2 interfering with the moving driving mechanism 3 respectively.

[0087] Of course, the structure of the moving component 4 may also be other possible structures, and this embodiment does not limit the structure of the moving component 4.

[0088] In some embodiments, see Figure 6 The tab smoothing mechanism also includes: a film-joining member 5, which is arranged on the moving component 4. The moving driving mechanism 3 is also used to drive the moving component 4 to move toward the direction close to the winding needle C, and drive the film-joining member 5 to move to contact the diaphragm G to make the diaphragm G joint.

[0089] Since the film-joining component 5 is arranged on the moving component 4, when the mobile driving mechanism 3 drives the moving component 4 to move, the film-joining component 5 can also be driven to move synchronously. With this arrangement, the film-joining component 5, the first smoothing component 1 and the second smoothing component 2 can share the mobile driving mechanism 3, thereby further reducing the cost of the tab smoothing mechanism and reducing the volume of the tab smoothing mechanism.

[0090] Among them, the above-mentioned film-joining member 5 can be a roller-shaped structure. For example, the film-joining member 5 can be a film-joining roller. Of course, the film-joining member 5 can also be other possible structures as long as it can play the role of film joining. This embodiment does not limit the shape of the film-joining member 5.

[0091] In some embodiments, see Figure 6 The tab smoothing mechanism 100 also includes: a swinging member 6 and a swinging driving member 7, wherein the swinging member 6 is swingably disposed on the moving component 4, the first smoothing component 1 and the second smoothing component 2 are both disposed on the swinging member 6, the swinging driving member 7 is disposed on the moving component 4 and connected to the swinging member 6, and the swinging driving member 7 is used to drive the swinging member 6 to swing relative to the moving component 4, so as to drive the first smoothing component 1 and the second smoothing component 2 to swing in a direction away from or close to the winding needle C.

[0092] Since the swinging member 6 is swingably arranged on the moving component 4, and the swinging driving member 7 is arranged on the moving component 4 and connected to the swinging member 6, when it is necessary to combine the films through the film combining member 5, the swinging driving member 7 can drive the swinging member 6 to drive the first smoothing component 1 and the second smoothing component 2 to swing in the direction away from the winding needle C. In this way, the possibility of the first smoothing component 1 and the second smoothing component 2 interfering with the winding needle C respectively when combining the films through the film combining member 5 can be avoided or reduced.

[0093] After the film is completed by the film combining component 5, the swing driving component 7 can drive the swinging component 6 to drive the first smoothing component 1 and the second smoothing component 2 to swing towards the direction close to the winding needle C, so as to facilitate the smoothing of the first pole ear and the second pole ear by the first smoothing component 1 and the second smoothing component 2 respectively.

[0094] The swing driving member 7 may be a pneumatic cylinder or an electric cylinder, etc., and this embodiment does not limit the swing driving member 7.

[0095] The swing member 6 may be swingably disposed on the moving assembly 4 via a rotating shaft, or may be swingably disposed on the moving assembly 4 via other methods, which is not limited in this embodiment.

[0096] See also Figure 5 This embodiment also provides a battery cell winding device 200 , and the battery cell winding device 200 includes a tab smoothing mechanism 100 .

[0097] Among them, the structure of the tab smoothing mechanism 100 can be the same as the structure of any tab smoothing mechanism 100 in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments, and this embodiment will not be repeated here.

[0098] In this embodiment, since the tab smoothing mechanism 100 can smooth both the anode tab D11 and the cathode tab D21, based on this, when the battery cell winding device 200 includes the tab smoothing mechanism 100, the quality of the wound battery cell can be improved.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tab smoothing mechanism, characterized in that: include: A first smoothing component (1), the first smoothing component (1) being used to be arranged on a movement path of a first pole lug on a first pole piece (A), the first smoothing component (1) being capable of smoothing the first pole lug before the first pole lug is wound on a winding needle (C); A second smoothing component (2), the second smoothing component (2) being used for being arranged on a movement path of a second pole lug on a second pole piece (B), the second smoothing component (2) being capable of smoothing the second pole lug before the second pole lug is wound on the winding needle (C); The first electrode tab is one of an anode electrode tab (D11) and a cathode electrode tab (D21), and the second electrode tab is the other of the anode electrode tab (D11) and the cathode electrode tab (D21).

2. The tab smoothing mechanism according to claim 1, characterized in that: The first smoothing component (1) comprises: A first smoothing plate (11) is used to be arranged at the winding position of the first pole lug and can contact a side of the peripheral wall of the first pole lug away from the winding needle (C) to smooth the first pole lug.

3. The tab smoothing mechanism according to claim 2, characterized in that: The first caressing plate (11) comprises: A first guide section (111); A first smoothing section (112), the first guiding section (111) and the first smoothing section (112) are sequentially arranged along the winding direction of the first pole lug and connected to each other, the first smoothing section (112) is used to contact a side of the peripheral wall of the first pole lug away from the winding needle (C) to smooth the first pole lug, the first guiding section (111) is inclined along a first direction (F1) in a direction gradually away from the winding needle (C), and the first direction (F1) is opposite to the winding direction of the first pole lug.

4. The tab smoothing mechanism according to claim 1, characterized in that: The second smoothing component (2) comprises: A second smoothing plate (21), the second smoothing plate (21) is used to be arranged at the winding position of the second pole lug, and can contact a side of the peripheral wall of the second pole lug away from the winding needle (C) to smooth the second pole lug.

5. The tab smoothing mechanism according to claim 4, characterized in that: The second smoothing component (2) also includes: A third smoothing plate (22), the third smoothing plate (22) is located between the second smoothing plate (21) and the first smoothing assembly (1), the third smoothing plate (22) and the first smoothing assembly (1) are used together to smooth the first pole ear before the first pole ear is wound on the winding needle (C).

6. The tab smoothing mechanism according to claim 5, characterized in that: The third caressing plate (22) is arranged on the second caressing plate (21).

7. The tab smoothing mechanism according to claim 4, characterized in that: The second smoothing plate (21) is swingably connected to the first smoothing component (1) so as to adjust the angle between the second smoothing plate (21) and the first smoothing component (1).

8. The tab smoothing mechanism according to any one of claims 1 to 7, characterized in that: The tab smoothing mechanism also includes: Mobile drive mechanism (3); A moving component (4), wherein the moving component (4) is arranged on the moving drive mechanism (3), the first smoothing component (1) and the second smoothing component (2) are both arranged on the moving component (4), and the moving drive mechanism (3) is used to drive the moving component (4) to move, so as to synchronously drive the first smoothing component (1) and the second smoothing component (2) to move to the movement path of the first pole ear and the movement path of the second pole ear respectively.

9. The tab smoothing mechanism according to claim 8, characterized in that: The tab smoothing mechanism also includes: A film-joining member (5), wherein the film-joining member (5) is arranged on the moving component (4), and the moving drive mechanism (3) is also used to drive the moving component (4) to move in a direction close to the winding needle (C).

10. The tab smoothing mechanism according to claim 9, characterized in that: The tab smoothing mechanism also includes: A swinging member (6), the swinging member (6) being swingably disposed on the moving assembly (4), the first smoothing assembly (1) and the second smoothing assembly (2) both being disposed on the swinging member (6); A swinging driving member (7), wherein the swinging driving member (7) is arranged on the moving component (4) and connected to the swinging member (6), and the swinging driving member (7) is used to drive the swinging member (6) to swing relative to the moving component (4), so as to drive the first smoothing component (1) and the second smoothing component (2) to swing in a direction away from or close to the winding needle (C).

11. A battery cell winding device (200), characterized in that: The battery cell winding device comprises the tab smoothing mechanism (100) according to any one of claims 1 to 10.

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