A tab smoothing mechanism and battery core processing system

Abstract

The present invention relates to the technical field of battery manufacturing, and provides a tab smoothing mechanism and a cell processing system, wherein the tab smoothing mechanism has a fixing member, which is arranged on one side of the end of the winding core with the tab, and the fixing member has a guide surface facing the end of the winding core, and the distance between the guide surface and the end of the winding core with the tab gradually decreases from the feed end to the discharge end, so that the tab moves relative to the fixing member as the winding core is wound, and when passing through the guide surface, the tab is squeezed by the guide surface toward the end of the winding core, and the tab squeezed by the guide surface can bend toward the end face of the winding core, which can effectively avoid the tab folding, wrinkling, disorder and other undesirable phenomena during the winding process, thereby improving the winding quality of the winding core. The cell processing system having the tab smoothing mechanism also has the above advantages.

Description

Technical Field

[0001] The invention relates to the field of battery manufacturing, and in particular to a tab smoothing mechanism and a battery core processing system. Background Art

[0002] With the rapid development of lithium batteries, higher requirements are placed on battery production efficiency and product quality. In the battery manufacturing process, the winding process of the battery cell is one of the important processes. In the related technology, it is very easy for the battery cell to have undesirable phenomena such as folding, wrinkling, and disorder of the pole ears when winding, or the pole ears of each layer interfere with each other during winding, thereby causing damage to the pole ears and affecting the battery production efficiency and product quality. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a tab smoothing mechanism, which can smooth the tab when the battery cell is wound.

[0004] The present invention also provides a battery core processing system having the above-mentioned tab smoothing mechanism.

[0005] According to the first aspect of the present invention, the tab smoothing mechanism is used to smooth the tab at the end of the winding core wound on the winding needle, and the tab smoothing mechanism includes:

[0006] A bracket, provided with a mounting portion;

[0007] A first guide mechanism is connected to the mounting portion, the first guide mechanism includes a fixing member, the fixing member is arranged on one side of the winding needle corresponding to the end of the winding core with the pole ear, along the moving path of the pole ear, the fixing member has a feed end and a discharge end, the fixing member has a guide surface on the side facing the pole ear, the distance between the guide surface and the end of the winding core gradually decreases from the feed end to the discharge end, and the guide surface is used to smooth the end of the pole ear toward the winding core.

[0008] The tab smoothing mechanism of the embodiment of the present invention has at least the following beneficial effects: the guide surface is used to smooth the end surface of the tab facing the pole sheet material strip during winding. A channel for the tab to pass through is formed between the guide surface and the end of the winding core with the tab. The tab can move relative to the fixed part as the winding core is wound, so that it can enter the channel from the feed end and move out of the channel from the discharge end. In this process, since the distance between the guide surface and the end of the winding core with the tab gradually decreases from the feed end to the discharge end, the tab moving in the channel is squeezed by the guide surface toward the end of the winding core until it moves out from the discharge end. The tab squeezed by the guide surface can bend toward the end surface of the winding core, which can effectively avoid the tab folding, wrinkling, disorder and other undesirable phenomena during the winding process, thereby improving the winding quality of the winding core.

[0009] According to some embodiments of the present invention, the feed end and the discharge end are respectively located on two sides of the winding needle.

[0010] According to some embodiments of the present invention, the fixing member is in a fan-shaped structure with the axis of the winding needle as the central axis, a slot for inserting the winding needle is provided on the inner side of the fixing member, and the outer radius of the fixing member is not less than the maximum radius of the winding core required for winding.

[0011] According to some embodiments of the present invention, along the moving path of the tab, the thickness of the fixing member gradually increases from the feeding end to the discharging end.

[0012] According to some embodiments of the present invention, the first guiding mechanism further includes a connecting member connected to the mounting portion and a side of the fixing member facing away from the pole ear.

[0013] According to some embodiments of the present invention, the tab smoothing mechanism further includes a second guiding mechanism, wherein the second guiding mechanism includes:

[0014] A movable part, corresponding to the end of the winding core, is arranged on one side of the winding needle, and the movable part includes a connecting part and a guiding part, the connecting part is connected to the mounting part, and the guiding part is located on one side of the feeding end, and can be shielded between the pole ear of the winding core and the pole ear of the pole sheet strip at the junction of the winding core and the pole sheet strip to be wound;

[0015] The driving assembly is used for driving the movable member to move relative to the fixed member until the guide portion is located at the joint.

[0016] According to some embodiments of the present invention, the guide portion has a guide edge, the guide edge is parallel to the pole piece strip, one end of the guide edge is located at the joint, and the guide edge is used to support the pole ear on the side of the pole piece strip facing the winding needle.

[0017] According to some embodiments of the present invention, a side of the guide portion facing the end portion of the winding core has a shielding surface, and the shielding surface is located between the pole lug of the winding core and the pole lug of the pole sheet strip.

[0018] According to some embodiments of the present invention, the driving assembly includes a driving element and a connecting plate, the connecting plate is connected to the mounting portion, the connecting plate is provided with a guide groove, the connecting portion is connected to a guide column, the guide column is passed through the guide groove and can move along the guide groove, the driving element is used to drive the connecting portion to move, and the guide groove is used to limit the moving path of the guide column.

[0019] According to some embodiments of the present invention, the guide groove has a first end and a second end, and the distance between the first end and the winding needle is smaller than the distance between the second end and the winding needle.

[0020] According to some embodiments of the present invention, the guide groove is arc-shaped, and a concave arc side of the guide groove faces away from the winding needle.

[0021] According to some embodiments of the present invention, the driving assembly also includes a gear and a rack, the rack is fixedly connected to the movable part, the gear is connected to the driving element, the gear is meshed with the rack, and the driving element is used to drive the gear to rotate so that the rack drives the movable part to move.

[0022] According to a second aspect of the present invention, a battery core processing system includes:

[0023] frame;

[0024] A winding mechanism, connected to the frame, comprising a winding drive assembly and a winding needle, wherein the winding needle is used to wind the winding core, and the winding drive assembly is used to drive the winding needle to rotate; and

[0025] In the tab smoothing mechanism of the first aspect of the embodiment, the bracket is connected to the frame, and the tab smoothing mechanism is used to smooth the tab at the end of the winding core on the winding needle.

[0026] The battery cell processing system of the embodiment of the present invention has at least the following beneficial effects: the winding mechanism can wind the pole sheet strip to form a winding core, and the pole ear smoothing mechanism can smooth the pole ears of the winding core while the winding needle drives the winding core to rotate, thereby realizing synchronous winding and smoothing, and can effectively avoid damage to the pole ears during the winding process, thereby helping to improve the processing efficiency and quality of the battery cells.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 A schematic diagram of a tab smoothing mechanism according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A front view of

[0031] Figure 3 for Figure 2 A-direction schematic diagram;

[0032] Figure 4 for Figure 3 A local enlarged schematic diagram of point B in FIG.

[0033] Figure 5 is a schematic structural diagram of a fixing member in one embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the structure of a movable part in an embodiment of the present invention;

[0035] Figure 7 Schematic diagram showing that the joint between the pole piece strip and the winding core changes position as the thickness of the winding core increases.

[0036] Reference numerals:

[0037] Rolling needle 110, bracket 120;

[0038] A first guide mechanism 130, a fixing member 131, a feed end 132, a discharge end 133, and a guide surface 134;

[0039] The second guide mechanism 140, the movable member 141, the connecting portion 142, the guiding portion 143, the guiding edge 144, the shielding surface 145, the driving assembly 146, the gear 1461, the rack 1462, the connecting plate 147, the guiding groove 148, and the guiding column 149;

[0040] Joint 150, joint position variation curve 151;

[0041] Winding core 1, pole piece strip 2, pole ear 3. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0046] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] Figure 1 Schematic diagram of a tab smoothing mechanism according to an embodiment of the present invention, Figure 2 for Figure 1 The front view of Figure 3 for Figure 2 A-direction schematic diagram, Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in FIG. Figures 1 to 4 The first embodiment of the present invention provides a tab smoothing mechanism for smoothing the tab 3 at the end of the winding core 1 wound on the winding needle 110. The tab smoothing mechanism includes a bracket 120 and a first guide mechanism 130. The bracket 120 is provided with a mounting portion, and the first guide mechanism 130 is connected to the mounting portion. The first guide mechanism 130 includes a fixing member 131, and the fixing member 131 is provided on one side of the winding needle 110 corresponding to the end of the winding core 1 with the tab 3. Along the moving path of the tab 3, the fixing member 131 has a feed end 132 and a discharge end 133, and the fixing member 131 has a guide surface 134 on the side facing the tab 3, thereby, a channel for the tab 3 to pass through is formed between the guide surface 134 and the end of the winding core 1 with the tab 3, and the tab 3 can move relative to the fixing member 131 as the winding of the winding core 1 is performed, so that the tab 3 can enter the channel from the feed end 132 and move out of the channel from the discharge end 133.

[0048] Reference Figure 4In this embodiment, the distance between the guide surface 134 and the end of the winding core 1 gradually decreases from the feed end 132 to the discharge end 133. Therefore, the guide surface 134 can gradually squeeze the pole ear 3 toward the end of the winding core 1 while the pole ear 3 moves in the channel until the pole ear 3 moves out from the discharge end 133. The pole ear 3 squeezed by the guide surface 134 can be bent toward the end surface of the winding core 1. Therefore, the guide surface 134 can smooth the pole ear 3 toward the end of the winding core 1 during winding, which can avoid the undesirable phenomena such as folding, wrinkling, and disorder of the pole ear 3 during winding, effectively avoid damage to the pole ear 3, and thus help improve the winding quality of the winding core 1. In addition, the pole ear smoothing mechanism can smooth the pole ear 3 of the winding core 1 while the pole piece is being wound. Therefore, when the winding of the winding core 1 is completed, the pole ear 3 at the end of the winding core 1 is also smoothed, thereby eliminating the subsequent smoothing process.

[0049] In addition, in order to improve the production efficiency of the battery cell, the commonly used method is to increase the winding speed of the winding machine, that is, to increase the rotation speed of the winding needle. However, as the winding speed increases, the tabs wound on the winding needle are very likely to be turned outward, disordered, or interfere with the tabs to be wound due to centrifugal force, thereby affecting the quality of the battery cell. The tab smoothing mechanism of the embodiment of the present application can smooth the tabs 3 wound on the winding needle 110, and its smoothing effect can effectively avoid the above-mentioned problems caused by the centrifugal force of the tabs 3 during the winding process. Therefore, the rotation speed of the winding needle 110 can be further increased to a certain extent, thereby helping to improve the winding efficiency and quality.

[0050] Reference Figure 1 and Figure 2In the above embodiment, the guide surface 134 of the fixing member 131 can cover a part of the moving path of the pole tab 3, so that the pole tab 3 wound on the winding needle 110 can be gradually smoothed when passing the guide surface 134. It should be noted that the size of the fixing member 131 from the feed end 132 to the discharge end 133 can be reasonably configured based on the rotation speed of the winding needle 110, the degree of downward pressure of the pole tab 3, and the thickness of the winding core 1 to be wound, so as to ensure that the pole tab 3 can be gradually pressed down toward the end of the winding core 1 and smoothed in an appropriate movement distance, and avoid a large degree of compression of the pole tab 3 in an overly short movement distance. If the dimension of the fixing member 131 from the feed end 132 to the discharge end 133 is too short, the portion of the guide surface 134 covering the moving path of the pole lug 3 is too short, and the distance the pole lug 3 passes through the guide surface 134 during winding is too short. As a result, the degree of squeezing of the pole lug 3 per unit distance (i.e., the distance the pole lug 3 is squeezed toward the end of the winding core 1) is too large, and it is difficult to ensure the smoothing effect, and the pole lug 3 is easily damaged. In the tab smoothing mechanism of the present embodiment, the feed end 132 and the discharge end 133 of the fixing member 131 are respectively located on both sides of the winding needle 110, so that the channel between the guide surface 134 and the end of the winding core 1 extends to both sides of the circumference of the winding needle 110, ensuring that the channel has an appropriate length. Therefore, the tab 3 wound on the winding needle 110 enters the channel from the feed end 132 on one side of the winding needle 110, and is gradually squeezed toward the end of the winding core 1 by the guide surface 134 in the channel as the winding needle 110 rotates, and then moves out of the channel from the discharge end 133 on the other side of the winding needle 110, which can ensure the smoothing effect of the tab 3.

[0051] Figure 5 FIG. 1 is a schematic diagram of the structure of a fixing member in an embodiment of the present invention, referring to FIG. Figure 5 In the above embodiment, the fixing member 131 is in a fan-shaped structure with the axis of the winding needle 110 as the central axis, which can adapt to the movement path of the pole ear 3 wound on the winding needle 110. A slot for inserting the winding needle 110 is provided on the inner side of the fixing member 131 to avoid interference. The outer radius of the fixing member 131 is not less than the maximum radius of the winding core 1 to be wound, so that the pole ear 3 from the inner side to the outer side of the winding core 1 can be smoothed during the entire winding process of the winding core 1.

[0052] Reference Figure 2 and Figure 5In some embodiments of the tab smoothing mechanism, along the moving path of the tab 3, the thickness of the fixing member 131 gradually increases from the feed end 132 to the discharge end 133, wherein the fixing member 131 can be connected to the mounting portion of the bracket 120 through the side away from the guide surface 134, or connected to the mounting portion through a connecting member, that is, the first guide mechanism 130 can also include a connecting member, the connecting member is connected to the mounting portion and the side of the fixing member 131 away from the tab 3, therefore, the connection position of the connecting member can be reasonably set according to the position of the winding needle 110 and the thickness of the winding core 1 to be wound, so as to ensure that the guiding surface 134 of the fixing member 131 corresponds to the end of the winding core 1. The fixing member 131 can adopt a design similar to that of the Archimedean spiral to facilitate the processing of the fixing member 131. After assembly, due to the change in thickness, the side of the fixing member 131 facing the core 1 gradually approaches the end of the core 1 from the feed end 132 to the discharge end 133, that is, the distance between the surface of the fixing member 131 facing the core 1 and the end of the core 1 decreases from the feed end 132 along the movement path of the pole lug 3 to the discharge end 133, thereby forming the above-mentioned guide surface 134, and a channel with a size gradually decreasing along the extending direction of the pole lug 3 is formed between the guide surface 134 and the end of the core 1, so that the end surface of the pole lug 3 facing the core 1 can be gradually pressed down to achieve the smoothing of the pole lug 3.

[0053] Reference Figure 1 and Figure 2In some embodiments, the tab smoothing mechanism further includes a second guide mechanism 140, which includes a movable member 141 and a drive assembly 146. The movable member 141 is arranged on one side of the winding needle 110 corresponding to the end of the winding core 1. The movable member 141 includes a connecting portion 142 and a guiding portion 143. The connecting portion 142 is connected to the mounting portion. The guiding portion 143 is located on one side of the feeding end 132. The guiding portion 143 can be connected between the winding core 1 wound on the winding needle 110 and the winding core 1 to be wound on the winding needle 110. The joint 150 of the rolled-in pole piece strip 2 is shielded between the pole lug 3 rolled on the winding needle 110 and the pole lug 3 on the pole piece strip 2 to be rolled, which can effectively avoid the mutual interference between the pole lug 3 of the winding core 1 rolled on the winding needle 110 and the pole lug 3 to be rolled. The driving component 146 is used to drive the movable part 141 to move relative to the fixed part 131, so that the guide part 143 remains located at the joint 150 of the winding core 1 rolled on the winding needle 110 and the pole piece strip 2 to be rolled. As the thickness of the winding core 1 gradually becomes thicker, the driving component 146 drives the movable part 141 to move relative to the fixed part 131 so that the guide part 143 remains shielded between the pole lug 3 rolled on the winding core 1 and the pole lug 3 to be rolled. As the winding core 1 is wound layer by layer, the shielding of the guide part 143 can ensure that the pole lug 3 on the winding core 1 and the pole lug 3 to be rolled do not interfere with each other during winding. During winding, each layer of the pole lugs 3 on the core 1 enters the channel between the guide surface 134 and the end of the core 1 from the feed end 132 of the fixing member 131. When the core 1 is wound until the pole lugs 3 are moved out from the discharge end 133 of the fixing member 131, the pole lugs 3 of the same layer on the core 1 are squeezed toward the end of the core 1 by the guide surface 134, so that each pole lug 3 and the end of the core 1 are at the same set angle, that is, the pole lugs 3 are bent at the same angle toward the winding needle 110, so that the pole lugs 3 of different layers do not interfere with each other, thereby avoiding collision between the pole lugs 3 of different layers, resulting in defects such as disorder and folding of the pole lugs 3, thereby ensuring orderly stratification of the pole lugs 3.

[0054] Figure 6 FIG. 1 is a schematic diagram of the structure of the movable member 141 in one embodiment of the present invention, referring to FIG. Figure 2 and Figure 6 In some embodiments, the guide portion 143 of the movable member 141 has a guide edge 144, which is parallel to the pole sheet strip 2 to be wound, and one end of the guide edge 144 is located at the joint 150. The guide edge 144 is used to support the pole ear 3 on the side of the pole ear 3 of the pole sheet strip 2 facing the winding needle 110. The guide edge 144 parallel to the pole sheet strip 2 can simultaneously support multiple pole ears 3 on the pole sheet strip 2, thereby separating the pole ears 3 on the pole sheet strip 2 from the pole ears 3 that have been wound on the winding needle 110, avoiding mutual collision and damage of the two parts of the pole ears 3 during the winding process.

[0055] Reference Figure 2 and Figure 6In some embodiments, the guide portion 143 has a shielding surface 145 on one side of the end portion of the winding core 1, and the shielding surface 145 is located between the pole lug 3 of the winding core 1 and the pole lug 3 of the pole sheet strip 2 to be wound, and can shield the pole lug 3 on the winding core 1 to avoid interference. The shielding surface 145 can be an inclined surface or an arc surface, and gradually moves away from the end portion of the winding core 1 toward the direction of the outer pole lug 3, which can effectively avoid the pole lug 3 on the winding core 1 and avoid collision.

[0056] Figure 7 This is a schematic diagram showing how the joint between the pole piece strip and the winding core changes position as the thickness of the winding core increases. Figure 7 During the winding process of the winding needle 110, there is a joint 150 between the outer layer of the winding core 1 wound on the winding needle 110 and the pole piece strip 2 to be wound, that is, the position where the pole piece strip 2 is wound into the winding core 1. As the winding continues, the thickness of the winding core 1 gradually increases, and the position of the joint 150 also changes continuously. Under the premise that the conveying path of the pole piece strip 2 remains unchanged, the joint 150 where the pole piece strip 2 is wound into the winding core 1 changes from the inner layer of the winding core 1 to the outer side along a set curved path. For the convenience of explanation, Figure 7 The diagram shows the joint 150 where the pole piece strip 2 is wound into the winding core 1 when the thickness of the winding core 1 is different, and a position variation curve 151 of the joint 150 is obtained by connecting each joint 150 with a curve.

[0057] Reference Figure 1 , Figure 2 and Figure 7 In the pole ear smoothing mechanism of the embodiment of the present application, the driving component 146 may include a driving element and a connecting plate 147, the connecting plate 147 is connected to the mounting portion, the connecting plate 147 is provided with a guide groove 148, the connecting portion 142 of the movable member 141 is connected with a guide column 149, the guide column 149 is penetrated in the guide groove 148 and can move along the guide groove 148, the driving element is used to drive the connecting portion 142 to move, the guide groove 148 is used to limit the moving path of the guide column 149, and as driven by the driving element, the guide column 149 moves along the guide groove 148, which can drive the movable member 141 to move relative to the winding needle 110 according to the set path, and the guide portion 143 is maintained at the junction 150 between the winding core 1 and the pole sheet strip 2 to be wound, shielding between the pole ear 3 of the winding core 1 and the pole ear 3 on the pole sheet strip 2. Among them, the guide groove 148 has a first end and a second end, and the distance between the first end and the winding needle 110 is smaller than the distance between the second end and the winding needle 110. Therefore, the movement of the guide column 149 along the guide groove 148 can change the distance between the guide part 143 and the winding needle 110, that is, change the distance between the guide part 143 and the winding core 1 wound on the winding needle 110, so as to move the guide part 143 to the above-mentioned joint 150 accordingly as the winding core 1 becomes thicker.

[0058] Reference Figure 1 and Figure 2In some embodiments, the guide groove 148 on the connecting plate 147 may be arc-shaped, and the concave arc side of the guide groove 148 faces away from the winding needle 110, so that when the guide column 149 moves along the guide groove 148, the guide portion 143 can be moved accordingly along the arc path, so that it can move accordingly with the position change of the above-mentioned joint 150. The curvature of the guide groove 148 can be set to be consistent with the curvature of the curve connected to the above-mentioned joint 150. At this time, it is only necessary to drive the movable member 141 to move along the guide groove 148 to ensure that one end of the guide portion 143 moves with the position change of the joint point. In addition, since the speed of winding the pole piece strip 2 is constant, the rate of change of the inclination angle of the pole piece strip 2 is also constant, and the guide edge 144 of the guide portion 143 can remain parallel to the pole piece strip 2 to be wound and can support the pole ear 3 of the pole piece strip 2.

[0059] A conventional linear motion mechanism can be used to drive the movable member 141 to move relative to the connecting plate 147 along the guide groove 148. For example, the conventional linear motion mechanism includes a synchronous belt mechanism, a gear rack mechanism, a screw module mechanism or a cylinder mechanism, etc. The driving assembly 146 of this embodiment includes a driving element, a gear 1461 and a rack 1462. The rack 1462 is fixedly connected to the movable member 141, and the gear 1461 is connected to the driving element. The gear 1461 meshes with the rack 1462 to form a gear rack mechanism. The driving element is used to drive the gear 1461 to rotate, so that the rack 1462 drives the movable member 141 to move. The mechanism is simple, reliable and easy to implement.

[0060] As can be seen from the above, the tab smoothing mechanism of the embodiment of the present application can smooth the tab 3 of the winding core 1 wound on the winding needle 110 during winding to avoid damage to the tab 3, and in some embodiments, it can also separate the tab 3 of the pole sheet strip 2 to be wound from the tab 3 of the winding core 1 to avoid interference, thereby facilitating the orderly stratification of the tab 3 on the winding core 1. Therefore, when applied to the processing of battery cells, it helps to improve the efficiency and quality of winding the core 1, reduce the risk of damage to the tab 3 during the winding process, and thus save materials and reduce waste to a certain extent.

[0061] The second aspect of the present invention provides a battery core processing system (not shown, part of the structure can refer to Figures 1 to 7), including a frame, a winding mechanism and a tab smoothing mechanism, wherein the winding mechanism is connected to the frame, and the winding mechanism can adopt a winding machine commonly used for winding cores in the production of battery cells, and the winding mechanism includes a winding drive assembly and a winding needle 110. The winding needle 110 is used to wind the pole sheet strip 2 to form a core 1, and the winding drive assembly is used to drive the winding needle 110 to rotate. The tab smoothing mechanism adopts the tab smoothing mechanism of the first embodiment described above, the bracket 120 of the tab smoothing mechanism is connected to the frame 600, and the fixing member 131 is arranged on one side of the winding needle 110 corresponding to the end of the core 1 with the tab 3. As can be seen from the above, the tab smoothing mechanism can be used to smooth the tab 3 at the end of the core 1 on the winding needle 110, and the tab 3 of the core 1 can be smoothed while the winding needle 110 drives the core 1 to rotate, thereby realizing synchronous winding and smoothing, which can effectively avoid damage to the tab 3 during the winding process, thereby helping to improve the processing efficiency and quality of the battery cell. After winding is completed, the subsequent smoothing process can be omitted. In some embodiments, the tab smoothing device can also separate the tabs 3 of the pole sheet strip 2 to be wound from the tabs 3 of the winding core 1 to avoid interference, thereby facilitating the orderly stratification of the tabs 3 on the winding core 1.

[0062] The battery cell processing system can also be provided with a controller and a sensor (not shown in the figure). The controller is communicatively connected with the winding needle 110 drive assembly 146 and the sensor. The sensor is used to detect the thickness of the core 1 on the winding needle 110, and generates an induction signal when the core 1 reaches the set thickness. The controller receives the induction signal and instructs the winding needle 110 to stop winding. At this time, the pole piece strip 2 can be cut to facilitate the discharge of the core 1.

[0063] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A tab smoothing mechanism, characterized in that: Used to smooth the tabs of the winding core wound on the winding needle, the tab smoothing mechanism includes: A bracket, provided with a mounting portion; A first guide mechanism is connected to the mounting portion, the first guide mechanism includes a fixing member, the fixing member is arranged on one side of the winding needle corresponding to the axial end of the winding core with the pole ear, and along the moving path of the pole ear, the fixing member has a feed end and a discharge end, and the fixing member has a guide surface on the side facing the pole ear, and the distance between the guide surface and the axial end of the winding core gradually decreases from the feed end to the discharge end, forming a channel with a gradually smaller size along the extending direction of the pole ear, and the guide surface is used to gradually press down and smooth the end surface of the pole ear toward the winding core, so that the pole ear bends toward the end surface of the winding core.

2. The tab smoothing mechanism according to claim 1, characterized in that: The feeding end and the discharging end are respectively located on two sides of the winding needle.

3. The tab smoothing mechanism according to claim 2, characterized in that: The fixing member is in a fan-shaped structure with the axis of the winding needle as the central axis. A slot for inserting the winding needle is provided on the inner side of the fixing member. The outer radius of the fixing member is not less than the maximum radius of the winding core required for winding.

4. The tab smoothing mechanism according to claim 2, characterized in that: Along the moving path of the tab, the thickness of the fixing member gradually increases from the feeding end to the discharging end.

5. The tab smoothing mechanism according to claim 1, characterized in that: The first guiding mechanism further includes a connecting member, which is connected to the mounting portion and a side of the fixing member away from the pole ear.

6. The tab smoothing mechanism according to any one of claims 1 to 5, characterized in that: Also included is a second guiding mechanism, wherein the second guiding mechanism comprises: A movable part, corresponding to the end of the winding core, is arranged on one side of the winding needle, and the movable part includes a connecting part and a guiding part, the connecting part is connected to the mounting part, and the guiding part is located on one side of the feeding end, and can be shielded between the pole ear of the winding core and the pole ear of the pole sheet strip at the junction of the winding core and the pole sheet strip to be wound; The driving assembly is used for driving the movable member to move relative to the fixed member until the guide portion is located at the joint.

7. The tab smoothing mechanism according to claim 6, characterized in that: The guide portion has a guide edge, the guide edge is parallel to the pole piece strip, one end of the guide edge is located at the joint, and the guide edge is used to support the pole ear of the pole piece strip on a side facing the winding needle.

8. The tab smoothing mechanism according to claim 6, characterized in that: The guide portion has a shielding surface on one side facing the end of the winding core, and the shielding surface is located between the pole lug of the winding core and the pole lug of the pole sheet strip.

9. The tab smoothing mechanism according to claim 6, characterized in that: The driving assembly includes a driving element and a connecting plate, wherein the connecting plate is connected to the mounting portion, the connecting plate is provided with a guide groove, the connecting portion is connected with a guide column, the guide column is passed through the guide groove and can move along the guide groove, the driving element is used to drive the connecting portion to move, and the guide groove is used to limit the moving path of the guide column.

10. The tab smoothing mechanism according to claim 9, characterized in that: The guide groove has a first end and a second end, and the distance between the first end and the winding needle is smaller than the distance between the second end and the winding needle.

11. The tab smoothing mechanism according to claim 10, characterized in that: The guide groove is arc-shaped, and the concave arc side of the guide groove faces away from the winding needle.

12. The tab smoothing mechanism according to claim 9, characterized in that: The driving assembly also includes a gear and a rack, the rack is fixedly connected to the movable part, the gear is connected to the driving element, the gear is meshed with the rack, and the driving element is used to drive the gear to rotate so that the rack drives the movable part to move.

13. A battery core processing system, characterized in that: include: frame; A winding mechanism, connected to the frame, comprising a winding needle drive assembly and a winding needle, wherein the winding needle is used to wind the winding core, and the winding needle drive assembly is used to drive the winding needle to rotate; as well as, The tab smoothing mechanism according to any one of claims 1 to 12, wherein the bracket is connected to the frame, and the tab smoothing mechanism is used to smooth the tab at the end of the winding core on the winding needle.

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