Feeding deviation rectifying device and winding equipment

Abstract

The utility model is applicable to the technical field of lithium batteries, and provides a feeding deviation rectifying device and winding equipment, the feeding deviation rectifying device comprises a pole piece deviation rectifying assembly, the pole piece deviation rectifying assembly comprises a mounting base, a deviation rectifying sliding block and a deviation rectifying driving assembly, and a first pressing wheel, a second pressing wheel and a wheel driving assembly are arranged on the deviation rectifying sliding block. The axis of the first pressing wheel and the axis of the second pressing wheel are both parallel to the first direction, the common perpendicular line of the axis of the first pressing wheel and the axis of the second pressing wheel is parallel to the second direction, and the second direction is the direction perpendicular to the plate face of the pole piece at the deviation rectifying gap. The axes (namely the center lines) of the first pressing wheel and the second pressing wheel are aligned in the moving direction of the second pressing wheel, so that deviation of the first pressing wheel and the second pressing wheel during contact is avoided, and the phenomenon that the pole piece deforms and even fractures when the pole piece is clamped by the first pressing wheel and the second pressing wheel can be avoided; therefore, the winding precision of the battery cell is further improved, and the production quality of the battery cell is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery technical field especially relates to a material feeding deviation rectifying device and winding equipment. BACKGROUND

[0002] Lithium battery is a kind of battery with higher energy density and good environmental protection performance, with high energy, high reliability and good processing, therefore is widely used in various portable electronic equipment, electric vehicle, energy storage power station and other electric equipment.Capacitive lithium battery is mainly composed of battery core and outer package, wherein battery core is wound by positive and negative pole piece, diaphragm through winding equipment.Among them, in order to ensure the accuracy of pole piece winding, deviation rectifying device is usually arranged on winding equipment.But the existing deviation rectifying device mostly has the problem of easily leading to pole piece deformation, which seriously affects the production quality of battery core. SUMMARY

[0003] The utility model aims at providing a material feeding deviation rectifying device and winding equipment, to solve the technical problem of the existing winding equipment in use, which is prone to lead to pole piece deformation.

[0004] The utility model is realized as follows, first, a material feeding deviation rectifying device is provided, the material feeding deviation rectifying device includes pole piece deviation rectifying assembly, the pole piece deviation rectifying assembly includes mounting base, deviation rectifying sliding block and deviation rectifying drive assembly, the deviation rectifying sliding block is slidably arranged on the mounting base, the drive end of the deviation rectifying drive assembly is connected with the deviation rectifying sliding block, for driving the deviation rectifying sliding block reciprocating sliding along the first direction, the first direction is the width direction of the pole piece;

[0005] The deviation rectifying sliding block is provided with first pressure wheel, second pressure wheel and wheel drive assembly, the axis of the first pressure wheel and the axis of the second pressure wheel are parallel with the first direction, the deviation rectifying assembly has deviation gap for pole piece passing between the first pressure wheel and the second pressure wheel, the first pressure wheel and the second pressure wheel all have the freedom of rotating around the axis, the second pressure wheel also has the freedom of moving along the second direction, the second direction is the direction perpendicular to the plate surface of pole piece at the deviation gap, the common perpendicular line of the axis of the first pressure wheel and the axis of the second pressure wheel is parallel with the second direction, the wheel drive assembly is used to drive the second pressure wheel to move along the second direction, and when the second pressure wheel is close to the first pressure wheel, the pole piece is clamped between the second pressure wheel and the first pressure wheel.

[0006] In an optional embodiment, the deviation rectifying assembly further comprises a deviation rectifying support, which is located in front of the second pressing wheel along the direction of movement of the pole piece and can move with the second pressing wheel, and the deviation rectifying support further comprises an auxiliary support surface for supporting the pole piece, and the auxiliary support surface is parallel to the pole piece.

[0007] In an optional embodiment, the wheel driving assembly comprises a wheel driving unit and a wheel mounting seat, the main body of the wheel driving unit is fixed on the deviation rectifying slider, the wheel mounting seat is fixedly arranged on the driving end of the wheel driving unit, the second pressing wheel is rotatably arranged on the wheel mounting seat, and the deviation rectifying support is also fixedly arranged on the wheel mounting seat.

[0008] In an optional embodiment,

[0009] The deviation rectifying slider is provided with a first mounting shaft penetrating the first pressing wheel, and the first pressing wheel is provided with a one-way bearing between the first mounting shaft, the wheel mounting seat is provided with a second mounting shaft penetrating the second pressing wheel, and the second pressing wheel is provided with a one-way bearing between the second mounting shaft;

[0010] And / or, the surface hardness of the first pressing wheel is less than the surface hardness of the second pressing wheel.

[0011] In an optional embodiment, the deviation rectifying driving assembly comprises a driving base, a driving slider and a power assembly, the driving slider is slidably arranged on the driving base, and the driving slider is rigidly connected with the deviation rectifying slider, the power assembly comprises a rotating screw and a driving motor, the rotating screw is rotatably arranged on the driving base and threadedly connected with the driving slider, and the output end of the driving motor is connected with the rotating screw for driving the rotating screw to rotate.

[0012] In an optional embodiment, the number of the pole piece deviation rectifying assemblies is multiple, and the number of the pole piece deviation rectifying assemblies matches the number of the pole pieces constituting the battery cell.

[0013] In an optional embodiment, the material feeding deviation rectifying device further comprises a pushing piece structure, and the pushing piece structure is used for pushing the pole piece to a preset direction.

[0014] In an optional embodiment, the pushing piece structure comprises a pushing piece support, a blowing assembly and a pushing piece driving unit, the blowing assembly is used for emitting air flow to the pole piece to push the pole piece to a preset direction, the pushing piece driving unit is arranged between the pushing piece support and the blowing assembly, and the pushing piece driving unit is used for driving the blowing assembly to move away from or close to the pole piece.

[0015] In an alternative embodiment, the blowing assembly comprises a main block, an inner part of the main block is provided with a sealed cavity for communicating with an external air source, and a plurality of blowing holes are provided on the main block for communicating the sealed cavity with the outside of the main block.

[0016] In a second aspect, the application provides a winding device comprising the material inlet deviation rectifying device described in any of the above aspects.

[0017] The first aspect of the utility model has the following technical effects compared with the prior art: the deviation rectifying sliding block is arranged on the mounting base in a sliding manner, and the deviation rectifying sliding block is driven to reciprocate in the first direction by the deviation rectifying driving assembly. Meanwhile, the first pressing wheel and the second pressing wheel are arranged on the deviation rectifying sliding block, and the deviation rectifying gap for the passage of the pole piece is arranged between the first pressing wheel and the second pressing wheel. In operation, the pole piece can pass through the deviation rectifying gap, and then the second pressing wheel is driven to move in the second direction towards the first pressing wheel by the wheel driving assembly, and the pole piece is clamped between the second pressing wheel and the first pressing wheel when the second pressing wheel approaches the first pressing wheel, so that the pole piece can move together with the deviation rectifying sliding block, thereby realizing the deviation rectifying operation of the pole piece and ensuring the quality of the winding of the battery cell. Compared with the material inlet deviation rectifying device in the prior art, the first pressing wheel and the second pressing wheel are arranged in a way of oblique pushing and pressing, the axes of the first pressing wheel and the second pressing wheel are parallel to the first direction, and the common perpendicular line of the axes of the first pressing wheel and the second pressing wheel is parallel to the second direction, wherein the second direction is perpendicular to the surface of the pole piece at the deviation rectifying gap. The axes (i.e. the center lines) of the first pressing wheel and the second pressing wheel are arranged in alignment in the movement direction of the second pressing wheel, deviation between the first pressing wheel and the second pressing wheel when they contact is avoided, the pole piece is prevented from being deformed or broken when it is clamped by the first pressing wheel and the second pressing wheel, the precision of the winding of the battery cell is improved, the difficulty of subsequent processes such as plastic packaging is reduced, and the production yield and stability of the wound battery cell are improved.

[0018] It can be understood that the beneficial effects of the second aspect described above can be referred to the related description in the first aspect described above, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be briefly introduced the drawings needed to be used in the description of the utility model embodiment or the prior art. Obviously, the following described drawings are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0020] Figure 1 It is the structure diagram of the material inlet deviation rectifying device provided by the utility model embodiment;

[0021] Figure 2Is the structure schematic view of the pole piece deviation correction assembly adopted by the embodiment of the utility model;

[0022] Figure 3 Is Figure 2 The enlarged structure schematic view of A in the middle;

[0023] Figure 4 Is the structure schematic view of the wheel driving assembly adopted by the embodiment of the utility model;

[0024] Figure 5 Is the structure schematic view of the push piece structure adopted by the embodiment of the utility model.

[0025] Mark explanation:

[0026] 100, pole piece deviation correction assembly; 200, push piece structure; 300, pole piece;

[0027] 11, mounting base; 12, deviation correction sliding block; 13, deviation correction driving assembly; 131, driving base; 132, driving sliding block; 133, rotating screw rod; 134, driving motor; 135, connecting piece; 14, first compression wheel; 15, second compression wheel; 16, wheel driving assembly; 161, wheel mounting base; 162, wheel driving unit; 17, deviation correction supporting piece; 171, auxiliary supporting surface; 18, compression wheel driving unit; 19, one-way bearing;

[0028] 21, push piece support; 22, air blowing assembly; 221, main block; 222, sealing cavity; 223, air blowing hole; 23, push piece driving unit. DETAILED DESCRIPTION

[0029] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.

[0030] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the limitation of the utility model.

[0031] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0032] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples.

[0034] Please refer to Figures 1 to 4 In the embodiment of the present application, a first aspect provides a material feeding deviation correcting device, which comprises a pole piece deviation correcting assembly, the pole piece deviation correcting assembly comprises a mounting base 11, a deviation correcting sliding block 12 and a deviation correcting driving assembly 13, the deviation correcting sliding block 12 is slidingly arranged on the mounting base 11, the driving end of the deviation correcting driving assembly 13 is connected with the deviation correcting sliding block 12, and the deviation correcting driving assembly 13 is used for driving the deviation correcting sliding block 12 to reciprocally slide in a first direction, the first direction is the width direction of the pole piece. A first pressing wheel 14, a second pressing wheel 15 and a wheel driving assembly 16 are arranged on the deviation correcting sliding block 12, the axis of the first pressing wheel 14 and the axis of the second pressing wheel 15 are both parallel to the first direction, the first pressing wheel 14 and the second pressing wheel 15 have a deviation correcting gap for the pole piece to pass through between them, the first pressing wheel 14 and the second pressing wheel 15 both have the freedom of rotating around their own axes, and the second pressing wheel 15 also has the freedom of moving in a second direction, the second direction is perpendicular to the surface of the pole piece at the deviation correcting gap, the common perpendicular line of the axis of the first pressing wheel 14 and the axis of the second pressing wheel 15 is parallel to the second direction, and the wheel driving assembly 16 is used for driving the second pressing wheel 15 to move in the second direction, and clamping the pole piece between the second pressing wheel 15 and the first pressing wheel 14 when the second pressing wheel 15 is close to the first pressing wheel 14.

[0035] Specifically, the mounting base 11 refers to a component with a certain volume, and the mounting base 11 can be block-shaped, plate-shaped, or a combination of multiple shapes. The deviation correction sliding block 12 also refers to a component with a certain volume, and the deviation correction sliding block 12 can be block-shaped, plate-shaped, or a combination of multiple shapes. The deviation correction sliding block 12 can be slidably arranged on the mounting base 11 through a sliding block sliding rail structure, a roller sliding rail structure, or a V-shaped sliding rail, etc. The deviation correction driving assembly 13 refers to a component or assembly that can drive a body to move along a straight line. The deviation correction driving assembly 13 can be a gas cylinder, a hydraulic cylinder, or an electric push rod, etc. The deviation correction driving assembly 13 can also be a lead screw sliding block structure or a crank sliding block structure, etc., and is driven by a motor to realize the function of driving other components to move along a straight line.

[0036] The first pressure roller 14 and the second pressure roller 15 both refer to columnar components with a certain height, and the axis of the first pressure roller 14 and the axis of the second pressure roller 15 are both parallel to the first direction, so that the first pressure roller 14 and the second pressure roller 15 are also parallel to each other. The deviation correction gap refers to a gap structure with a certain width, and the deviation correction gap is located in the area between the first pressure roller 14 and the second pressure roller 15. The width of the deviation correction gap can range from zero to infinity. The wheel driving assembly 16 also refers to a component or assembly that can drive a body to move along a straight line. The wheel driving assembly 16 can be a gas cylinder, a hydraulic cylinder, or an electric push rod, etc. The first pressure roller 14 and the second pressure roller 15 both have the freedom to rotate around their own axes. After the first pressure roller 14 and the second pressure roller 15 clamp the pole piece, they can rotate with the movement of the pole piece.

[0037] The feeding deviation rectifying device provided by the embodiment of the utility model, the deviation rectifying slider 12 is slidably arranged on the mounting base 11, and the deviation rectifying slider 12 is driven to reciprocate along the first direction by the deviation rectifying driving assembly 13. Meanwhile, the first pressure roller 14 and the second pressure roller 15 are arranged on the deviation rectifying slider 12, the deviation rectifying gap for the passage of the pole piece is arranged between the first pressure roller 14 and the second pressure roller 15, the pole piece can pass through the deviation rectifying gap during work, then the second pressure roller 15 is driven to move along the second direction towards the first pressure roller 14 by the wheel driving assembly 16, and the pole piece is clamped between the second pressure roller 15 and the first pressure roller 14 when the second pressure roller 15 approaches the first pressure roller 14, so that the pole piece can move together with the deviation rectifying slider 12, and the deviation rectifying operation of the pole piece can be realized to ensure the quality of the cell winding. Compared with the feeding deviation rectifying device in the prior art, the first pressure roller 14 and the second pressure roller 15 are arranged in the inclined pushing and pressing mode, the axes of the first pressure roller 14 and the second pressure roller 15 are parallel to the first direction, the common perpendicular line of the axis of the first pressure roller 14 and the axis of the second pressure roller 15 is parallel to the second direction, the second direction is perpendicular to the surface of the pole piece at the deviation rectifying gap, the axes (i.e. the center lines) of the first pressure roller 14 and the second pressure roller 15 are arranged in alignment in the movement direction of the second pressure roller 15, deviation of the first pressure roller 14 and the second pressure roller 15 when contacting can be avoided, the pole piece can be prevented from being deformed or broken when the pole piece is clamped by the first pressure roller 14 and the second pressure roller 15, and therefore the precision and stability of the cell winding are improved.

[0038] In an optional embodiment, referring to Figures 1 to 3 The pressure roller driving unit 18 for driving the first pressure roller 14 to rotate is further arranged on the deviation rectifying slider 12, the driving end of the pressure roller driving unit 18 and the first pressure roller 14 are further provided with a transmission structure, the pressure roller driving unit 18 can be a motor or a hydraulic motor, and the transmission structure can be a belt transmission or a gear transmission. In the embodiment, the pressure roller driving unit 18 drives the first pressure roller 14 to rotate through the transmission structure during the movement of the pole piece, and the second pressure roller 15 is driven to rotate together with the first pressure roller 14 during the rotation of the first pressure roller 14, so that the rotation speed of the first pressure roller 14 and the second pressure roller 15 is kept the same as the transportation speed of the pole piece, and the deformation of the pole piece is avoided.

[0039] In an embodiment, referring to Figure 4The deviation rectifying assembly further comprises a deviation rectifying support 17 located in front of the second pressing wheel 15 along the direction of movement of the pole piece and movable with the second pressing wheel 15, and the deviation rectifying support 17 further has an auxiliary support surface 171 for supporting the pole piece, and the auxiliary support surface 171 is parallel to the pole piece. Specifically, the deviation rectifying support 17 refers to a component with a certain volume, which can be block-shaped, plate-shaped or a combination of multiple shapes. The auxiliary support surface 171 refers to a surface structure with a certain area, which is generally a planar structure. The front along the direction of movement of the pole piece refers to that the pole piece first passes through the second pressing wheel 15 and then passes through the deviation rectifying support 17 during movement. In this embodiment, the deviation rectifying support 17 is arranged in front of the second pressing wheel 15 along the direction of movement of the pole piece, and the auxiliary support surface 171 parallel to the plate surface of the pole piece is further arranged on the side of the deviation rectifying support 17 facing the pole piece. When the second pressing wheel 15 and the first pressing wheel 14 clamp the pole piece, the auxiliary support surface 171 also abuts against the plate surface of the pole piece. The auxiliary support surface 171 can support the pole piece to some extent to keep the pole piece flat and prevent the pole piece from deforming.

[0040] In one embodiment, referring to Figure 3 and Figure 4 The wheel driving assembly 16 comprises a wheel driving unit 162 and a wheel mounting seat 161. The main body of the wheel driving unit 162 is fixed to the deviation rectifying slider 12, the wheel mounting seat 161 is fixedly arranged on the driving end of the wheel driving unit 162, the second pressing wheel 15 is rotatably arranged on the wheel mounting seat 161, and the deviation rectifying support 17 is also fixedly arranged on the wheel mounting seat 161. Specifically, the wheel driving unit 162 refers to a component or assembly for driving a body to move along a straight line, which can be a pneumatic cylinder, a hydraulic cylinder or an electric push rod. The wheel mounting seat 161 refers to a support component with a certain volume, which can be block-shaped, plate-shaped or a combination of multiple shapes. In this embodiment, the main body of the wheel driving unit 162 is fixed to the deviation rectifying slider 12, the wheel mounting seat 161 is fixedly arranged on the driving end of the wheel driving unit 162, and the second pressing wheel 15 is rotatably arranged on the wheel mounting seat 161. The wheel driving unit 162 can drive the wheel mounting seat 161 to reciprocate along the second direction, so that the second pressing wheel 15 can reciprocate along the second direction with the wheel mounting seat 161 on the premise of self-rotation around its own axis. Meanwhile, the deviation rectifying support 17 is also fixedly arranged on the wheel mounting seat 161, so that the deviation rectifying support 17 can also move with the second pressing wheel 15. The wheel driving assembly 16 adopts the above structure, which can make its structure simpler and make the installation of the second pressing wheel 15 and the deviation rectifying support 17 more convenient.

[0041] In one optional embodiment, referring to Figure 4, the deviation correction support 17 can be in a split structure with the wheel mounting seat 161, and can be installed on the wheel mounting seat 161 by clamping, welding or fastener connection, so as to reduce the manufacturing and production cost of the wheel mounting seat 161 and the deviation correction support 17. The deviation correction support 17 can also be in an integral structure with the wheel mounting seat 161, and can be integrally formed by machining, casting or injection molding. Thus, the connection between the deviation correction support 17 and the wheel mounting seat 161 is more firm, and the safety in use is improved.

[0042] In one embodiment, referring to Figure 3 , the deviation correction slider 12 is provided with a first mounting shaft penetrating through the first compression wheel 14, and a one-way bearing 19 is arranged between the first compression wheel 14 and the first mounting shaft. The wheel mounting seat 161 is provided with a second mounting shaft penetrating through the second compression wheel 15, and a one-way bearing 19 is arranged between the second compression wheel 15 and the second mounting shaft. Specifically, the first mounting shaft and the second mounting shaft are both columnar structures with a certain length. In order to make the first compression wheel 14 or the second compression wheel 15 rotate more conveniently, the cross section of the first mounting shaft and the second mounting shaft is generally circular. The one-way bearing 19 is a bearing that can rotate freely in one direction and is locked in the other direction, and mainly has wedge block type, slope type and roller type working modes. By arranging the first mounting shaft on the deviation correction slider 12 and penetrating through the first compression wheel 14, the first compression wheel 14 can rotate around the first mounting shaft. By arranging the second mounting shaft on the wheel mounting seat 161 and penetrating through the second compression wheel 15, the second compression wheel 15 can rotate around the second mounting shaft. At the same time, the one-way bearing 19 is arranged between the first compression wheel 14 and the first mounting shaft and between the second compression wheel 15 and the second mounting shaft. Thus, the first compression wheel 14 and the second compression wheel 15 can rotate conveniently, and the reverse rotation of the first compression wheel 14 and the second compression wheel 15 is avoided, so that the phenomenon that the pole piece is retracted due to tension and inertia during the winding of the battery cell is avoided.

[0043] In one embodiment, referring to Figure 3 , the surface hardness of the first compression wheel 14 is less than the surface hardness of the second compression wheel 15. Specifically, by making the surface hardness of the first compression wheel 14 less than the surface hardness of the second compression wheel 15, the first compression wheel 14 can play a certain buffering role when the second compression wheel 15 contacts the first compression wheel 14, so that the deformation of the pole piece when being clamped is avoided.

[0044] In an optional embodiment, referring to Figure 3The first pressure roller 14 can be sleeved with an elastic sleeve outside, and the material of the elastic sleeve can be rubber, silica gel or plastic, etc. The first pressure roller 14 can also be made of rubber, silica gel or plastic, etc.

[0045] In one embodiment, referring to Figure 2 The deviation correction driving assembly 13 comprises a driving base 131, a driving slider 132 and a power assembly. The driving slider 132 is slidingly arranged on the driving base 131, and the driving slider 132 is rigidly connected with the deviation correction slider 12. The power assembly comprises a rotating screw 133 and a driving motor 134. The rotating screw 133 is rotatably arranged on the driving base 131 and is threadedly connected with the driving slider 132. The output end of the driving motor 134 is connected with the rotating screw 133, and the driving motor 134 is used to drive the rotating screw 133 to rotate. Specifically, the driving base 131 refers to a component with a certain volume. The driving base 131 can be block-shaped, plate-shaped or combined with various shapes. The driving slider 132 also refers to a component with a certain volume. The driving slider 132 can be block-shaped, plate-shaped or combined with various shapes. The driving slider 132 is rigidly connected with the deviation correction slider 12, which means that the relative positions of the two are always kept unchanged. The driving slider 132 and the deviation correction slider 12 can be connected by a rigid component. The power assembly refers to a component or assembly that can drive a body to move in a straight line. In this embodiment, the power assembly is composed of the rotating screw 133 and the driving motor 134. The driving slider 132 is slidingly arranged on the driving base 131, and the rotating screw 133 is threadedly connected with the driving slider 132. When the rotating screw 133 rotates under the action of the driving motor 134, the driving slider 132 is pushed to slide along the axis of the rotating screw 133. Since the driving slider 132 is rigidly connected with the deviation correction slider 12, the movement of the driving slider 132 can drive the deviation correction slider 12 to move. This makes it more convenient and fast to drive the deviation correction slider 12 to move, and also makes the overall structure of the deviation correction driving assembly 13 simpler and more convenient to control.

[0046] In one embodiment, referring to Figure 1 The number of the pole piece deviation correction assemblies is multiple, and the number of the pole piece deviation correction assemblies matches the number of the pole pieces constituting the battery cell. Specifically, the pole pieces are usually two (i.e. positive pole pieces and negative pole pieces) in the production process of the battery cell. Therefore, the number of the pole piece deviation correction assemblies is usually two, and the two pole piece deviation correction assemblies can be oppositely arranged. On the premise of ensuring the winding accuracy of the battery cell, the space occupied by the pole piece deviation correction assemblies can be reduced, so that the space layout of the entire device is more reasonable.

[0047] In one embodiment, referring to Figure 1The feeding material deviation rectifying device further comprises a push piece structure 200, and the push piece structure 200 is used for pushing the pole piece to a preset direction. Specifically, the push piece structure 200 refers to a component or assembly that can push the pole piece to a preset direction. When the number of the pole piece deviation rectifying assemblies 100 is multiple, the push piece structure 200 can be arranged at a position below one of the pole piece deviation rectifying assemblies 100. In this embodiment, after the pole piece is cut off after the production of one battery cell is completed, the push piece structure 200 is used to push the pole piece to a preset direction, for example, to the right side of the winding needle, so as to avoid the pole piece from falling due to gravity and affecting the normal production and winding of the next battery cell, and the automation degree of the use of the winding equipment is higher.

[0048] In one embodiment, referring to Figure 5 The push piece structure 200 comprises a push piece support 21, a blowing assembly 22 and a push piece driving unit 23. The blowing assembly 22 is used for emitting airflow to the pole piece to push the pole piece to a preset direction. The push piece driving unit 23 is arranged between the push piece support 21 and the blowing assembly 22, and is used for driving the blowing assembly 22 to move away from or close to the pole piece. Specifically, the push piece support 21 refers to a component with a certain volume. The push piece support 21 can be block-shaped, plate-shaped or a combination of multiple shapes. The blowing assembly 22 refers to a component or assembly that can emit high-speed airflow to other objects. The push piece driving unit 23 refers to a component or assembly that can drive an object to move along a straight line. The push piece driving unit 23 can be a pneumatic cylinder, a hydraulic cylinder or an electric push rod, etc. In this embodiment, by arranging the push piece driving unit 23 between the push piece support 21 and the blowing assembly 22, when the pole piece needs to be pushed, the push piece driving unit 23 is used to drive the blowing assembly 22 to move to a direction close to the pole piece, and then the blowing assembly 22 is used to emit airflow to the pole piece to push the pole piece to a preset direction. On the premise of pushing the pole piece, contact with the pole piece can be avoided, so that the pushing of the pole piece is safer and more reliable.

[0049] In one embodiment, referring to Figure 5 The blowing assembly 22 comprises a main block 221. The inside of the main block 221 is provided with a sealed cavity 222 for communicating with an external air source. The main block 221 is further provided with a plurality of blowing holes 223 for communicating the sealed cavity 222 with the outside of the main block 221. Specifically, the main block 221 refers to a block-shaped component with a certain volume. In this embodiment, by arranging the sealed cavity 222 for communicating with the external air source in the inside of the main block 221, and further arranging the plurality of blowing holes 223 on the main block 221 for communicating the sealed cavity 222 with the outside of the main block 221, a plurality of airflows can be blown out through the blowing holes 223, so that the pushing of the pole piece by the blowing assembly 22 is more stable.

[0050] In the second aspect, the winding equipment is provided, and comprises the material feeding rectifying device of any one of the above. It can be understood that the beneficial effects of the second aspect can be referred to the related description in the first aspect, and will not be described here.

[0051] The above is only a preferred embodiment of the present application, and only the technical principle of the present application is specifically described. These descriptions are only for explaining the principle of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanation herein, any modification, equivalent replacement and improvement within the spirit and principle of the present application, and other specific embodiments of the present application that can be conceived by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A material entry correction device, characterized by, The pole piece deviation correction assembly comprises a mounting base, a deviation correction sliding block and a deviation correction driving assembly, the deviation correction sliding block is slidingly arranged on the mounting base, and the driving end of the deviation correction driving assembly is connected with the deviation correction sliding block and used to drive the deviation correction sliding block to reciprocatingly slide in a first direction, and the first direction is the width direction of the pole piece. The deviation correction sliding block is provided with a first pressing wheel, a second pressing wheel and a wheel driving assembly, the axis of the first pressing wheel and the axis of the second pressing wheel are parallel to the first direction, the first pressing wheel and the second pressing wheel have a deviation correction gap for the pole piece to pass through therebetween, the first pressing wheel and the second pressing wheel both have the freedom of rotating around the axis thereof, the second pressing wheel also has the freedom of moving in a second direction, the second direction is perpendicular to the surface of the pole piece at the deviation correction gap, the common perpendicular of the axis of the first pressing wheel and the axis of the second pressing wheel is parallel to the second direction, and the wheel driving assembly is used to drive the second pressing wheel to move in the second direction and clamp the pole piece between the second pressing wheel and the first pressing wheel when the second pressing wheel approaches the first pressing wheel.

2. The infeed correction device of claim 1, wherein, The deviation correction assembly further comprises a deviation correction support, the deviation correction support is located in front of the second pressing wheel in the movement direction of the pole piece, and the deviation correction support can move together with the second pressing wheel, and the deviation correction support is further provided with an auxiliary support surface for supporting the pole piece, and the auxiliary support surface is parallel to the pole piece.

3. The infeed correction device of claim 2, wherein, The wheel driving assembly comprises a wheel driving unit and a wheel mounting seat, the main body of the wheel driving unit is fixedly arranged on the deviation correction sliding block, the wheel mounting seat is fixedly arranged on the driving end of the wheel driving unit, the second pressing wheel is rotationally arranged on the wheel mounting seat, and the deviation correction support is also fixedly arranged on the wheel mounting seat.

4. The material feeding deviation correction device according to claim 3, wherein the deviation correction sliding block is provided with a first mounting shaft penetrating through the first pressing wheel, the first pressing wheel and the first mounting shaft are provided with a one-way bearing therebetween, the wheel mounting seat is provided with a second mounting shaft penetrating through the second pressing wheel, and the second pressing wheel and the second mounting shaft are provided with a one-way bearing therebetween; and / or, the surface hardness of the first pressing wheel is less than the surface hardness of the second pressing wheel.

5. The infeed correction device of claim 1, wherein, The deviation correction driving assembly comprises a driving base, a driving sliding block and a power assembly, the driving sliding block is slidingly arranged on the driving base, and the driving sliding block is rigidly connected with the deviation correction sliding block, the power assembly comprises a rotating screw and a driving motor, the rotating screw is rotationally arranged on the driving base and threadedly connected with the driving sliding block, and the output end of the driving motor is connected with the rotating screw and used to drive the rotating screw to rotate.

6. The infeed correction device of claim 1, wherein, The number of the pole piece deviation correction assemblies is multiple, and the number of the pole piece deviation correction assemblies matches the number of the pole pieces constituting the battery cell.

7. The infeed correction device of any one of claims 1 to 6, wherein, The material feeding deviation correction device further comprises a pushing piece structure, and the pushing piece structure is used to push the pole piece in a preset direction.

8. The infeed correction device of claim 7, wherein, The push piece structure comprises a push piece support, a blowing assembly and a push piece driving unit, the blowing assembly is used to send airflow to the pole piece to push the pole piece in a preset direction, the push piece driving unit is arranged between the push piece support and the blowing assembly, and the push piece driving unit is used to drive the blowing assembly to move away from or close to the pole piece.

9. The infeed correction device of claim 8, wherein, The blowing assembly comprises a main block, an internal part of the main block is provided with a sealed cavity used to communicate with an external air source, and a plurality of blowing holes used to communicate the sealed cavity with the outside of the main block are further arranged on the main block.

10. A winding apparatus characterized by comprising: The feeding rectification device comprises the feeding rectification device as claimed in any one of claims 1 to 9.

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