Pole piece cutting device and battery cell winding machine

Abstract

The utility model provides a pole piece cutting device and a battery cell winding machine, the pole piece cutting device comprises a mounting rack, a cutter seat, a first cutter, a pressing plate and a second cutter, the mounting rack is provided with a first guide column; the cutter seat is mounted on the first guide column in a sliding manner; the first cutter is arranged on the cutter holder; the pressing plate is connected with the cutter holder, the pressing plate is perpendicular to the first cutter, and the first cutter is arranged at one end, in the first direction, of the pressing plate; the second cutter is arranged on the mounting frame, a cutting edge of the second cutter and a cutting edge of the first cutter are oppositely arranged, the second cutter and the pressing plate are oppositely arranged, a groove is formed in the surface of the side, opposite to the pressing plate, of the second cutter, and the pressing plate and the first cutter can move towards or away from the second cutter along with the cutter base. The utility model solves the problem that the head of the existing pole piece is easy to roll up or tilt after being cut off, so that the head of the pole piece is easy to break.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a pole piece cutting device and a battery core winding machine. Background Art

[0002] The wound battery cell is wound by a battery cell winding machine. The battery cell winding machine usually separates the positive electrode sheet, negative electrode sheet and diaphragm into a coiled strip, and then stacks them on the winding needle in a certain order to form a battery cell. After the winding of one battery cell is completed, the electrode sheet needs to be cut before entering the winding of the next battery cell. However, the head of the electrode sheet is usually set as a single-sided coating area and an empty foil area. After the electrode sheet is cut, the head of the electrode sheet is easy to roll up or warp, and it is not easy to be fed into the winding needle for winding, so that the head of the electrode sheet is easy to bend, affecting the production efficiency and production quality of the battery cell. Utility Model Content

[0003] The utility model aims to solve the problem that the head of the existing pole piece is easy to roll up or tilt up after being cut off, so that the head of the pole piece is easy to bend.

[0004] In order to solve the above problems, the first aspect of the present invention provides a pole piece cutting device, comprising:

[0005] A mounting frame, wherein a first guide column is provided on the mounting frame;

[0006] A cutter seat, the cutter seat being slidably mounted on the first guide post;

[0007] a first cutter, wherein the first cutter is disposed on the cutter seat;

[0008] A pressing plate, the pressing plate is connected to the cutter seat, the pressing plate and the first cutter are arranged vertically, and the first cutter is arranged at one end of the pressing plate along the first direction;

[0009] The second cutter is arranged on the mounting frame, the blade of the second cutter is arranged facing the blade of the first cutter, the second cutter and the pressure plate are arranged opposite to each other, and a groove is arranged on the surface of the second cutter opposite to the pressure plate, and the pressure plate and the first cutter can both move toward or away from the second cutter along with the cutter seat.

[0010] Furthermore, the second cutter is provided with a plurality of grooves arranged along the first direction, each of the grooves extends along a third direction, and the third direction is perpendicular to the first direction.

[0011] Furthermore, the distance between any two adjacent grooves along the first direction is the same.

[0012] Furthermore, a surface of the pressing plate opposite to the second cutting knife is coated with a plastic layer.

[0013] Furthermore, a first guide surface is provided at one end of the pressure plate facing away from the first cutter, and a second guide surface is provided at one end of the second cutter. The first guide surface and the second guide surface are arranged opposite to each other along a second direction, and the distance between the first guide surface and the second guide surface gradually increases from the end close to the first cutter to the end facing away from the first cutter.

[0014] Furthermore, a second guide column is also provided on the mounting frame, the second guide column is arranged parallel to the first guide column, and the second guide column passes through the cutter seat and is connected to the pressing plate.

[0015] Furthermore, at least one elastic member is provided between the cutter seat and the pressing plate, one end of the elastic member is connected to the pressing plate, and the other end of the elastic member is connected to the cutter seat.

[0016] Furthermore, it also includes a driving member, which is arranged on the mounting frame and is used to drive the cutter seat to move toward or away from the second cutter along the first guide column.

[0017] Furthermore, the distance that the pressing plate moves to the second cutter is smaller than the distance that the blade of the first cutter moves to the blade of the second cutter.

[0018] A second aspect of the utility model provides a battery core winding machine, comprising the pole piece cutting device as described in the first aspect.

[0019] The pole piece cutting device and battery cell winding machine described in the utility model, the pressing plate and the first cutter are both arranged on the cutter seat, and the pressing plate and the first cutter are arranged vertically, and the cutter seat can drive the pressing plate and the first cutter to move toward or away from the second cutter, so that when the blade of the first cutter cooperates with the blade of the second cutter to cut the pole piece, the side surface of the pressing plate and the second cutter with the groove is cooperated, and the groove on the second cutter is pressed out on the surface of the pole piece to prevent the edge of the pole piece from rolling up after cutting, which is beneficial to improving the deformation resistance of the head of the pole piece, and the edge of the pole piece has the mark, which makes it easier for the pole piece to be fed into the winding needle for winding, and can reduce the probability of the pole piece head causing the corner problem, which is beneficial to improving the winding efficiency and winding quality of the battery cell; in addition, in the utility model, directly setting the groove on the second cutter can realize cutting the pole piece while pressing out the mark on the surface of the pole piece, which can reduce redundant actions, which is beneficial to improving the cutting efficiency of the pole piece, and directly setting the groove on the second cutter is beneficial to reducing the spatial volume of the pole piece cutting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional structural schematic diagram of a pole piece cutting device provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of a three-dimensional structure of a pole piece cutting device provided in an embodiment of the utility model;

[0022] Figure 3 Another schematic diagram of the three-dimensional structure of the pole piece cutting device provided in the embodiment of the utility model;

[0023] Figure 4 It is a partial structural schematic diagram of a pole piece cutting device provided in an embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of a pole piece cutting device provided in an embodiment of the utility model for cutting pole pieces. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the utility model, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, in the description of the utility model, the meaning of "at least one" is one or more, unless otherwise clearly and specifically defined.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the description of this specification, the term "as an optional implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one optional embodiment or optional example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] In this embodiment, the first direction is the x-axis direction in the figure, the second direction is the y-axis direction in the figure, and the third direction is the z-axis direction in the figure, wherein the first direction is also the conveying direction of the electrode piece.

[0029] Combination Figures 1 to 3 As shown, the first aspect of this embodiment provides a pole piece cutting device, which includes a mounting frame 10, a cutting knife seat 20, a first cutting knife 30, a pressing plate 40 and a second cutting knife 50, wherein:

[0030] The mounting frame 10 is a frame structure, which has a space for accommodating the cutter seat 20, the first cutter 30, the pressing plate 40 and the second cutter 50. The mounting frame 10 is provided with a first guide column 11, and the number of the first guide columns 11 is two. The first guide columns 11 are installed between the two opposite ends of the mounting frame 10 along the second direction;

[0031] The two ends of the cutter seat 20 along the third direction are slidably connected to the two first guide posts 11, respectively, so that the cutter seat 20 can slide along the first guide posts 11; the first cutter 30 is fixedly arranged on the cutter seat 20, so that the first cutter 30 can slide along the first guide posts 11 with the cutter seat 20, so that the first cutter 20 moves toward or away from the second cutter 50;

[0032] The pressing plate 40 is connected to the cutter seat 20, the pressing plate 40 and the first cutter 30 are vertically arranged, and the first cutter 30 is arranged at one end of the pressing plate 40 along the first direction, so that the pressing plate 40 and the first cutter 30 are in an "L" shape;

[0033] The second cutter 50 is arranged on the mounting frame 10, and the second cutter 50 is arranged opposite to the pressing plate 40 and the first cutter 30, and the blade of the second cutter 50 is arranged opposite to the blade of the first cutter 30, and a groove 51 is arranged on the surface of the second cutter 50 opposite to the pressing plate 40; when the cutter seat 20 slides along the first guide column 11, the first cutter 30 and the pressing plate 40 slide along the first guide column 11 with the cutter seat 20, so that the first cutter 30 and the pressing plate 40 are facing or facing away from each other. Move away from the second cutter 50. When the first cutter 30 and the pressure plate 40 are directed toward the second cutter 50, the blade of the first cutter 30 and the blade of the second cutter 50 cooperate to cut the pole piece 100. At the same time, the pressure plate 40 and the second cutter 50 cooperate with each other on one side surface of the groove 51. The groove 51 on the second cutter 50 presses an impression on the surface of the pole piece 100 to prevent the edge of the pole piece 100 from curling up after cutting, which is beneficial to improving the deformation resistance of the head of the pole piece 100.

[0034] The electrode cutting device provided in the present embodiment has a pressure plate and a first cutter both arranged on a cutter seat, and the pressure plate and the first cutter are arranged vertically, and the cutter seat can drive the pressure plate and the first cutter to move toward or away from the second cutter, so that while the blade of the first cutter cooperates with the blade of the second cutter to cut the electrode, the pressure plate and the second cutter cooperate with one side surface of the groove set by the second cutter, and an impression is pressed on the surface of the electrode through the groove on the second cutter to prevent the edge of the electrode from curling up after cutting, which is beneficial to improving the deformation resistance of the head of the electrode, and the edge of the electrode has an impression, which makes it easier for the electrode to be fed into the winding needle for winding, and can reduce the probability of the head of the electrode to have a folded corner problem, which is beneficial to improving the winding efficiency and winding quality of the battery cell; in addition, in the present embodiment, directly setting the groove on the second cutter can realize cutting the electrode and pressing the surface of the electrode at the same time, which can reduce redundant actions, which is beneficial to improving the cutting efficiency of the electrode, and directly setting the groove on the second cutter is beneficial to reducing the spatial volume of the electrode cutting device.

[0035] As an optional embodiment, the first guide column 11 can adopt a screw rod, the cutter seat 20 can be connected to the connecting block, and the connecting block can slide along the screw rod, so that the cutter seat 20 is slidably connected to the screw rod.

[0036] As an optional embodiment, a second guide column 12 is also provided on the mounting frame 10. The number of the second guide columns 12 is two. The second guide column 12 is arranged parallel to the first guide column 12, and one end of the second guide column 12 passes through the cutter seat 20 and is connected to the pressure plate 40. The other end of the second guide column 12 extends to the outside of the mounting frame 10, thereby enabling the pressure plate 40 to be connected to the cutter seat 20, so that the cutter seat 20 drives the pressure plate 40 to slide along the first guide column 11, so that the pressure plate 40 moves toward or away from the second cutter 50.

[0037] Combination Figure 4 and Figure 5 As shown, the second cutter 50 is provided with a plurality of grooves 51 arranged along the first direction, and each groove 51 extends along the third direction. Preferably, along the third direction, each groove 51 extends from one end of the second cutter 50 to the other end of the second cutter 50. In this way, each edge of the pole piece 100 after cutting can have an imprint, and it is prevented that one edge of the two adjacent edges of the pole piece 100 has an imprint and the other edge has no imprint, so that the corner of the pole piece 100 after cutting is rolled up or tilted. In this embodiment, the specific shape of the groove 51 is not further limited, and those skilled in the art can set it according to actual conditions. For example, the groove 51 can be a rectangular groove or an arc groove.

[0038] Based on the above embodiment, the spacing between any two adjacent grooves 51 along the first direction is the same, thereby ensuring that the imprints on the edge of the pole piece 100 are evenly distributed and preventing the edge of the pole piece 100 from warping due to uneven distribution of the imprints on the edge of the pole piece 100.

[0039] On the basis of the above-mentioned embodiment, the surface of the side of the pressing plate 40 opposite to the second cutter 50 is coated with a plastic layer 41, and the plastic layer 41 has a certain deformation ability. Therefore, the groove 51 on the second cutter 50 cooperates with the plastic layer 41 on the surface of the pressing plate 40 with the deformation ability, which can ensure that the imprint on the surface of the pole piece 100 has a good effect. In addition, the plastic layer 41 coated on the surface of the pressing plate 40 can effectively prevent the pole piece 100 from being over-extruded during the pressing process of the pole piece 100, avoid damage to the pole piece 100, and ensure the quality of the wound battery cell.

[0040] Combination Figure 4 and Figure 5As shown, a first guide surface 42 is provided at one end of the pressure plate 40 away from the first cutter 30, and a second guide surface 52 is provided at one end of the second cutter 50. The first guide surface 42 and the second guide surface 52 are arranged opposite to each other along the second direction, and the distance between the first guide surface 42 and the second guide surface 52 gradually increases from the end close to the first cutter 30 to the end away from the first cutter 30. Specifically, the pressing plate 40 includes a stamping area and a first guide area sequentially arranged along the first direction, the second cutter 50 includes a groove area and a second guide area sequentially arranged along the first direction, the stamping area and the groove area are arranged oppositely, and the stamping area and the groove area cooperate to press the pole piece 100 and press an impression on the surface of the pole piece 100, and the blade of the second cutter 50 is arranged on the side of the groove area away from one end of the second guide area; the first guide area and the second guide area are arranged oppositely, the first guide surface 42 is arranged in the first guide area, and the second guide surface 52 is arranged in the second guide area, the first guide surface 42 is inclined along the first direction, and the second guide surface 52 is inclined along the first direction, and the spacing between the first guide surface 42 and the second guide surface 52 is greater than the spacing between the stamping area and the groove area, so that a flaring structure is formed between the first guide surface 42 and the second guide surface 52. As a result, it is convenient for the pole piece 100 to be accurately inserted between the pressing plate 40 and the second cutter 50, and it can prevent the pressing plate 40 and the second cutter 50 from wearing the pole piece 100.

[0041] Combination Figure 1 As shown, at least one elastic member 60 is provided between the cutter seat 20 and the pressing plate 40, one end of the elastic member 60 is connected to the pressing plate 40, and the other end of the elastic member 60 is connected to the cutter seat 20, so that the elastic member 60 can apply elastic force to the pressing plate 40, and the second cutter 50 can press the pole piece 100 under the action of the elastic force, and the elastic member 60 can cooperate with the plastic layer 41, so that the imprint on the surface of the pole piece 100 has a better effect; in addition, the setting of the elastic member 60 can ensure that the blade of the first cutter 30 and the blade of the second cutter 50 can cut the pole piece 100 more smoothly. As an optional embodiment, the elastic member 60 can be a spring.

[0042] In this embodiment, at least two elastic members 60 are arranged between the cutter seat 20 and the pressing plate 40, and the two elastic members 60 are arranged along the third direction, thereby ensuring that the elastic force exerted by the elastic members 60 on the pressing plate 40 is more uniform, making the imprint distribution on the surface of the pole piece 100 more uniform, and making it possible to form a stable cutting surface between the blade of the first cutter 30 and the blade of the second cutter 50, avoiding the problem of uneven incision. By way of example, Figure 1 Four elastic members 60 are arranged between the middle cutter seat 20 and the pressing plate 40 .

[0043] In this embodiment, the pole piece cutting device further includes a driving member 70, which is disposed on the mounting frame 10, and is used to drive the cutter seat 20 to move toward the second cutter 50 along the first guide column 11, or to move away from the second cutter 50. As an optional embodiment, the driving member 70 is a cylinder, and the rod of the cylinder is connected to the cutter seat 20.

[0044] In this embodiment, the pressure between the pressing plate 40 and the second cutter 50 is equal to the driving force provided by the driving member 70, thereby ensuring that when the pressing plate 40 and the second cutter 50 press the pole piece 100, the imprint on the surface of the pole piece 100 has a better effect. In addition, the sum of the spacing between the pressing plate 40 and the second cutter 50 and the retreat distance of the pressing plate 40 is less than the distance that the driving member 70 drives the cutter seat 20 to move, that is, the distance from the pressing plate 40 to the second cutter 50 is less than the distance from the blade of the first cutter 30 to the blade of the second cutter 50, thereby achieving the cutting of the pole piece 100 while the pressing plate 40 and the second cutter press out an imprint on the surface of the pole piece 100.

[0045] The cutting process of the pole piece cutting device is described below:

[0046] When the pole piece cutting device is in a non-cutting state, the pole piece 100 enters between the pressing plate 40 and the second cutter 50 and between the first cutter 30 and the second cutter 50 from between the first guide surface 42 and the second guide surface 52. At this time, the blades of the pressing plate 40 and the first cutter 30 are in a flush state.

[0047] When the pole piece 100 needs to be cut, the driving member 70 drives the cutting knife seat 20 to move along the first guide column 11 toward the second cutting knife 50, so that the first cutting knife 30 on the cutting knife seat 20 moves toward the second cutting knife 50 to cut the pole piece. In the process of the cutting knife seat 20 moving toward the second cutting knife 50, the pressing plate 40 moves toward the second cutting knife 50 under the elastic force of the elastic member 60. Since the distance from the pressing plate 40 to the second cutting knife 50 is less than the distance from the blade of the first cutting knife 30 to the blade of the second cutting knife 50, the pressing plate 40 moves toward the second cutting knife 50. 0 will first move to the second cutter 50 under the elastic force of the elastic member 60, and the pressing plate 40 and the second cutter 50 will clamp the pole piece, and then the driving member 70 will continue to drive the cutter seat 20 to move toward the second cutter 50 until the blade of the first cutter 30 cooperates with the blade of the second cutter 50 to cut the pole piece, and in the process of the cutter seat 20 continuing to move toward the second cutter 50, the elastic member 60 applies pressure to the pressing plate 40, so that the pressing plate 40 and the second cutter 50 press the pole piece 100 and press a mark on the surface of the pole piece 100;

[0048] After the pole piece 100 is cut, the driving member 70 drives the cutter seat 20 to move along the first guide column 11 away from the second cutter 50, and the first cutter 30 and the pressure plate 40 both move away from the second cutter 50 until the first cutter 30 and the pressure plate 40 are reset to provide space for the pole piece 100 to pass through.

[0049] The second aspect of the present embodiment provides a battery cell winding machine, comprising the pole piece cutting device as described in the first aspect. The battery cell winding machine includes a pole piece cutting device, which can press out an impression on the surface of the pole piece to prevent the edge of the pole piece 100 from rolling up after cutting, which is beneficial to improving the deformation resistance of the head of the pole piece 100, and the edge of the pole piece 100 has an impression, which makes it easier to feed the pole piece 100 into the winding needle for winding, and can reduce the probability of the pole piece head having a folded corner problem, which is beneficial to improving the battery cell winding efficiency and winding quality.

[0050] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A pole piece cutting device, characterized in that: include: A mounting frame, wherein a first guide column is provided on the mounting frame; A cutter seat, the cutter seat being slidably mounted on the first guide post; a first cutter, wherein the first cutter is disposed on the cutter seat; A pressing plate, the pressing plate is connected to the cutter seat, the pressing plate and the first cutter are arranged vertically, and the first cutter is arranged at one end of the pressing plate along the first direction; The second cutter is arranged on the mounting frame, the blade of the second cutter is arranged facing the blade of the first cutter, the second cutter and the pressure plate are arranged opposite to each other, and a groove is arranged on the surface of the second cutter opposite to the pressure plate, and the pressure plate and the first cutter can both move toward or away from the second cutter along with the cutter seat.

2. The pole piece cutting device according to claim 1, characterized in that: The second cutter is provided with a plurality of grooves arranged along a first direction, each of the grooves extends along a third direction, and the third direction is perpendicular to the first direction.

3. The pole piece cutting device according to claim 2, characterized in that: The distance between any two adjacent grooves along the first direction is the same.

4. The pole piece cutting device according to claim 1, characterized in that: A surface of the pressing plate opposite to the second cutting knife is coated with a plastic layer.

5. The pole piece cutting device according to claim 1, characterized in that: A first guide surface is provided at one end of the pressure plate away from the first cutter, and a second guide surface is provided at one end of the second cutter. The first guide surface and the second guide surface are arranged opposite to each other along a second direction, and the distance between the first guide surface and the second guide surface gradually increases from the end close to the first cutter to the end away from the first cutter.

6. The pole piece cutting device according to claim 1, characterized in that: The mounting frame is also provided with a second guide column, the second guide column is arranged in parallel with the first guide column, and the second guide column passes through the cutter seat and is connected with the pressing plate.

7. The pole piece cutting device according to claim 1, characterized in that: At least one elastic member is arranged between the cutter seat and the pressing plate, one end of the elastic member is connected to the pressing plate, and the other end of the elastic member is connected to the cutter seat.

8. The pole piece cutting device according to claim 1, characterized in that: It also includes a driving member, which is arranged on the mounting frame and is used to drive the cutter seat to move toward or away from the second cutter along the first guide column.

9. The pole piece cutting device according to claim 1, characterized in that: The distance that the pressing plate moves to the second cutter is shorter than the distance that the blade of the first cutter moves to the blade of the second cutter.

10. A battery core winding machine, characterized in that: It comprises a pole piece cutting device as described in any one of claims 1 to 9.

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