Film covering mechanism

Abstract

The utility model discloses a film covering mechanism, and belongs to the technical field of battery manufacturing. The film laminating mechanism comprises a mounting seat, a film laminating mechanism and a film laminating mechanism, wherein a sliding seat and a driving mechanism are arranged on the mounting seat; the transmission rollers are arranged on the sliding seat in pairs, a gap used for transmitting a diaphragm in the first direction is formed between each pair of transmission rollers, the diaphragm is guided to the lamination table after penetrating through the gaps and is stacked with a pole piece, and the driving mechanism drives the sliding seat and the transmission rollers to move in the second direction; the second direction is the length direction of the transmission roller. When the transmission roller transmits the diaphragm along the first direction and guides the diaphragm to the lamination table, the driving mechanism drives the sliding seat so as to drive the transmission roller to move along the length direction of the transmission roller, so that when the transmission position of the diaphragm deviates (for example, the diaphragm inclines and deviates towards one side edge), deviation correction and return can be realized.

Description

Technical Field

[0001] The implementation method of the utility model relates to the field of battery manufacturing technology, in particular, to the field of lithium-ion battery cell manufacturing technology. Specifically, the application relates to a coating mechanism. Background Art

[0002] The battery cell of a lithium battery is formed by stacking multiple layers of electrode sheets and separators between adjacent electrode sheets. The conventional battery cell forming process is to alternately stack positive electrode sheets, separators, negative electrode sheets, separators, positive electrode sheets... to form a battery cell.

[0003] The diaphragm needs to be guided and transferred to the stacking platform by the laminating mechanism to complete the laying of the diaphragm, and the action of the stacking platform is coordinated to make the laid diaphragm and the battery pole piece form a stack. The discharge end of the laminating mechanism is generally provided with a transmission roller to limit the discharge direction of the diaphragm. In the process of the laminating mechanism guiding the transmission of the diaphragm, the diaphragm may slide along the length direction of the transmission roller, resulting in problems such as the diaphragm being skewed. After the skewed diaphragm is laid on the stacking platform, the outer wall of the stacked battery cell will be uneven, affecting the quality of the battery cell. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a laminating mechanism to ensure that the position of the diaphragm can be corrected and returned to the correct position during the laminating operation, thereby preventing the diaphragm from being tilted and affecting the lamination.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0006] The example of the present application provides a coating mechanism, including: a mounting seat, on which a sliding seat and a driving mechanism are arranged; and a plurality of transmission rollers, which are arranged in pairs on the sliding seat, and a gap is formed between each pair of transmission rollers for transmitting the diaphragm along a first direction, and after the diaphragm passes through the gap, it is guided to a stacking table and stacked with a pole piece, and the driving mechanism drives the sliding seat and the plurality of transmission rollers to move along a second direction to correct the transmission path of the diaphragm, and the second direction is the length direction of the transmission roller.

[0007] The laminating mechanism provided in the example of the present application, when the transmission roller transmits the diaphragm along the first direction and guides the diaphragm to the laminating table, the driving mechanism drives the sliding seat to drive the transmission roller to move along the length direction of the transmission roller, thereby being able to correct the deviation when the transmission position of the diaphragm deviates (for example, the diaphragm slides toward one side and tilts and deviates).

[0008] In some examples of laminating mechanisms, the sliding seat includes a guide rail and a roller frame, wherein: the guide rail is arranged on the mounting seat and extends along the second direction; the roller frame is slidably mounted on the guide rail, and the roller frame is driven by a driving mechanism to achieve sliding on the guide rail, and the transmission rollers are arranged in pairs on the roller frame.

[0009] The sliding seat is constructed by combining the guide rail and the roller frame, which is easy to assemble and maintain, and a plurality of transmission rollers can be conveniently arranged on the roller frame.

[0010] In some examples of the laminating mechanism, the laminating mechanism further includes a light curtain sensor, which is disposed on a sliding seat. The side edge of the diaphragm passes through a sensing area of ​​the light curtain sensor, and the light curtain sensor is used to detect the position of the side edge of the diaphragm.

[0011] A light curtain sensor is provided to detect whether the diaphragm position is deviated, so as to facilitate timely correction of the diaphragm position.

[0012] In some examples of laminating mechanisms, there are two pairs of transmission rollers, which are spaced apart from each other. The diaphragm is transmitted through the gaps between the upper and lower pairs of transmission rollers, and the light curtain sensor is located between the two pairs of transmission rollers.

[0013] The diaphragm is transported by two pairs of transport rollers, and the transport direction of the diaphragm is relatively stable. Moreover, by detecting whether the diaphragm position is skewed between the two pairs of transport rollers, the accuracy is higher.

[0014] In some examples of laminating mechanisms, there are two light curtain sensors, which are spaced apart laterally and respectively used to detect the positions of two side edges of the diaphragm, and the spacing between the two light curtain sensors is smaller than the width of the diaphragm.

[0015] Two light curtain sensors are arranged to detect the positions of the two sides of the diaphragm, so as to more accurately judge whether the diaphragm transmission is skewed.

[0016] In some examples of coating mechanisms, the driving mechanism includes a driving motor and a lead screw, one end of which is rotatably disposed on a mounting seat, and the other end of the lead screw can be driven to rotate by the driving motor, and a threaded ball screw sleeve is provided on the lead screw, and the ball screw sleeve is connected to the sliding seat.

[0017] The extension direction and stepping distance of the lead screw are stable, and the ball screw sleeve is driven to move back and forth by driving the lead screw to rotate, thereby realizing the movement of the sliding seat.

[0018] In some examples of the laminating mechanism, the laminating mechanism further comprises a film cutting assembly for cutting the diaphragm, and the film cutting assembly is disposed on the mounting seat and located at one side of the sliding seat.

[0019] The film cutting assembly is arranged on the mounting seat and adjacent to one side of the sliding seat, which improves the utilization rate and integration of the structural components. Compared with the additional independent setting, it saves the redundant setting and space occupation of similar components (such as the mounting seat and the related mechanisms driving the mounting seat to move).

[0020] In some examples of film coating mechanisms, the film cutting assembly includes a film cutting lifting mechanism, a cutting bracket and a cutting element, wherein: the film cutting lifting mechanism is arranged on a mounting seat, the cutting bracket is connected to the film cutting lifting mechanism, and the cutting bracket can be driven by the film cutting lifting mechanism to adjust the distance from the diaphragm, the cutting element is arranged at the bottom of the cutting bracket, and the cutting element is used to perform cutting of the diaphragm.

[0021] The film cutting lifting mechanism drives the cutting bracket to adjust the distance between the cutting element and the diaphragm, so as to facilitate the cutting operation.

[0022] In some examples of the film laminating mechanism, the film cutting lifting mechanism includes a telescopic cylinder, a piston rod of the telescopic cylinder is connected to the cutting bracket, and drives the cutting bracket to reciprocate along the first direction.

[0023] The telescopic cylinder has a simple structure, stable operation, and is easy to install and maintain.

[0024] In some examples of the laminating mechanism, the cutting element includes a hot cutting wire; or the cutting element includes a blade and a heating resistance wire disposed on the blade.

[0025] The hot cutting wire and the blade with heating resistance wire can be heated to the melting point of the diaphragm, so that the diaphragm is melted, the cutting efficiency is high and the incision is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the operating state of a laminating mechanism provided in an embodiment of the present application;

[0027] Figures 2 to 4 A schematic diagram of the structure of a laminating mechanism provided in an embodiment of the present application at different viewing angles;

[0028] In the figure:

[0029] 100, laminating mechanism; 200, diaphragm;

[0030] 110, mounting seat; 120, sliding seat; 130, driving mechanism; 140, transmission roller; 150, light curtain sensor; 160, film cutting assembly;

[0031] 121. Guide rail; 122. Roller frame;

[0032] 131. driving motor; 132. lead screw; 133. ball screw sleeve;

[0033] 141, a first transport roller; 142, a second transport roller; 143, a third transport roller; 144, a fourth transport roller;

[0034] 161. Film cutting lifting mechanism; 162. Cutting bracket; 163. Cutting element; 164. Lifting rail. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0036] Reference Figures 1 to 4 As shown, an embodiment of the present application provides a coating mechanism 100, including a mounting seat 110, a sliding seat 120, a driving mechanism 130 and a plurality of transmission rollers 140, wherein: the sliding seat 120 and the driving mechanism 130 are arranged on the mounting seat 110, and the plurality of transmission rollers 140 are arranged in pairs on the sliding seat 120, and the two pairs of transmission rollers 140 are arranged opposite to each other, and a gap is formed between the two pairs of transmission rollers 140, and the gap is used to transmit the diaphragm 200 along the first direction, and the diaphragm 200 is guided to the stacking table (not shown in the figure) after passing through the gap and is stacked with the pole piece, and the driving mechanism 130 drives the sliding seat 120 to move with the plurality of transmission rollers 140 along the second direction to correct the transmission path of the diaphragm 200, and the second direction is the length direction of the transmission roller 140.

[0037] In the coating mechanism 100 of the present application as exemplified above, when the transmission roller 140 transmits the diaphragm 200 along the first direction and guides the diaphragm 200 to the stacking platform, the driving mechanism 130 drives the sliding seat 120 to drive the transmission roller 140 to move along the length direction of the transmission roller 140. Therefore, when the transmission position of the diaphragm 200 deviates (for example, the diaphragm 200 slides along the length direction of the transmission roller 140 and deviates to one side of the diaphragm 200), it can be corrected and returned to the correct position, thereby avoiding the problem of uneven layers of the outer wall of the battery cell caused by the skewed diaphragm being laid on the stacking platform.

[0038] In some embodiments, the aforementioned sliding seat 120 includes a guide rail 121 and a roller frame 122, wherein: the guide rail 121 is arranged on the mounting seat 110, and the guide rail 121 extends along the second direction on the mounting seat 110, the roller frame 122 is slidably installed on the guide rail 121, and the roller frame 122 is driven by the driving mechanism 130 to achieve sliding on the guide rail 121, the roller frame 122 can be set to a more three-dimensional and stable structural form according to the working space conditions, the transmission rollers 140 are arranged in pairs on the roller frame 122 to obtain stable support, and the sliding seat 120 is constructed in a manner that the guide rail 121 and the roller frame 122 are easy to assemble and maintain, and it is convenient to arrange the transmission rollers 140 in pairs on the roller frame 122, and it is also convenient to arrange multiple pairs of transmission rollers 140.

[0039] In some embodiments, in order to timely determine whether the position of the diaphragm 200 is deviated and correct it in time, the laminating mechanism 100 further includes a light curtain sensor 150, which is disposed on the sliding seat 120. The side of the diaphragm 200 passes through the sensing area of ​​the light curtain sensor 150. The light curtain sensor 150 is used to detect the position of the side of the diaphragm 200. By setting the light curtain sensor 150 to detect whether the position of the diaphragm 200 is deviated, correction can be implemented in time. The light curtain sensor 150 detects the side of the diaphragm 200, compares the deviation between the detection value and the set value to determine whether deflection occurs, and can also be connected to a controller, which converts the deviation between the detection value and the set value into a proportional signal and drives the driven mechanism 130 to achieve correction.

[0040] In some embodiments, the laminating mechanism 100 includes two pairs of conveying rollers 140. The two pairs of conveying rollers 140 are used to convey the diaphragm 200. The conveying direction of the diaphragm 200 is relatively stable. Figures 1 to 4 The figure shows the specific arrangement of two pairs of transmission rollers 140: the first pair of transmission rollers 140 includes a first transmission roller 141 and a second transmission roller 142, the second pair of transmission rollers 140 includes a third transmission roller 143 and a fourth transmission roller 144, the first pair of transmission rollers 140 and the second pair of transmission rollers 140 are arranged at intervals in the vertical direction, the first transmission roller 141 and the second transmission roller 142 are flush in the vertical direction, the third transmission roller 143 and the fourth transmission roller 144 are flush in the vertical direction, and the diaphragm 200 is sequentially transmitted through the gap between the first transmission roller 141 and the second transmission roller 142, and the gap between the third transmission roller 143 and the fourth transmission roller 144. The light curtain sensor 150 is installed on the roller frame 122 and is located between the two pairs of transmission rollers 140 in the vertical direction. Relatively speaking, the detection of whether the position of the diaphragm 200 is skewed between the two pairs of transmission rollers 140 has higher accuracy and can reflect the result of the driving mechanism 130 driving the sliding seat 120 to correct the deviation. It can be understood that, in a specific implementation, the number of pairs of the transmission rollers 140 is not limited thereto, and three or four pairs may also be used.

[0041] In some embodiments of the laminating mechanism 100, in combination with Figure 4 As shown, a light curtain sensor 150 is respectively arranged near the two side edges of the diaphragm 200, that is, the two light curtain sensors 150 are arranged laterally at intervals, and the distance between the two light curtain sensors 150 is smaller than the width of the diaphragm 200, so that the positions of the two side edges of the diaphragm 200 are detected. The manner in which the two light curtain sensors 150 respectively detect the two side edges of the diaphragm 200 is helpful to more accurately determine whether the transmission of the diaphragm 200 is skewed.

[0042] In one embodiment, considering the fineness of the correction operation, in a specific implementation, the driving mechanism 130 can use a driving motor 131, a lead screw 132 and a ball screw sleeve 133 matched with the thread on the lead screw 132 (it can be understood that related components can also be included to better complete the assembly and action coordination), the lead screw 132 has a stable extension direction, and when driven, the ball screw sleeve 133 on the lead screw 132 can be stepped along the extension direction, wherein one end of the lead screw 132 is rotatably arranged on the mounting plate. On the mounting seat 110, the other end of the lead screw 132 can be driven to rotate by the driving motor 131, and the ball screw sleeve 133 is connected to the sliding seat 120, so that when the ball screw sleeve 133 is driven to move back and forth by rotating the lead screw 132, the movement of the sliding seat 120 can be realized. Specifically, the reciprocating movement of the ball screw sleeve 133 can drive the roller frame 122 to move on the guide rail 121, thereby driving the transmission roller 140 to move along the length direction of the transmission roller 140, thereby realizing the correction of the diaphragm transmission position.

[0043] In some other embodiments, the coating mechanism 100 also includes a film cutting assembly 160 for cutting the diaphragm 200. The film cutting assembly 160 can be arranged on the mounting seat 110 and located on one side of the sliding seat 120, so as to improve the utilization rate and integration of structural components. In particular, compared with the additional independent arrangement of the film cutting assembly 160, the method of this example saves the redundant arrangement and space occupancy of similar components (such as the mounting seat 110 and the related mechanism for driving the mounting seat 110 to move).

[0044] In some examples of the film coating mechanism 100, the film cutting assembly 160 includes a film cutting lifting mechanism 161, a cutting bracket 162 and a cutting element 163, wherein: the film cutting lifting mechanism 161 is arranged on the mounting seat 110, the cutting bracket 162 is connected to the film cutting lifting mechanism 161, and the cutting bracket 162 can be driven by the film cutting lifting mechanism 161, the cutting element 163 is arranged at the bottom of the cutting bracket 162, the cutting element 163 is used to perform the cutting of the diaphragm 200, and the distance between the cutting element 163 and the diaphragm 200 is adjusted as the cutting bracket 162 is driven, so as to achieve the cutting operation of the diaphragm. Exemplarily, a lifting rail 164 is provided on the mounting seat 110, the lifting rail 164 is located on one side of the sliding seat 120 and extends in the vertical direction, the cutting bracket 162 is slidably mounted on the lifting rail 164, and is driven by the film cutting lifting mechanism 161 to slide on the lifting rail 164 to achieve lifting. As another example, the film cutting lifting mechanism 161 includes a telescopic cylinder, the piston rod of which is connected to the cutting bracket 162, and drives the cutting bracket 162 to reciprocate along the first direction. The telescopic cylinder has a simple structure, stable operation, and is easy to install and maintain. As another example, the film cutting lifting mechanism 161 may include a motor and a vertical lead screw, the two ends of the vertical lead screw are rotatably arranged on the mounting seat 110, and the vertical lead screw extends along the vertical direction, the cutting bracket 162 is threadedly matched with the vertical lead screw, and the motor drives the vertical lead screw to rotate, thereby driving the cutting bracket to reciprocate on the vertical lead screw to achieve vertical lifting, thereby adjusting the distance between the cutting element 163 and the diaphragm 200. It can be understood that the specific implementation structure of the film cutting lifting mechanism 161 is limited to the above, as long as the height lifting and lowering adjustment of the cutting bracket 162 in the vertical direction can be achieved.

[0045] In some examples of the coating mechanism 100, the cutting element 163 includes a hot cutting wire; or, the cutting element 163 includes a blade and a heating resistor wire arranged on the blade. The hot cutting wire and the blade with the heating resistor wire can be heated to the melting point temperature of the diaphragm 200, so that the diaphragm 200 melts, the cutting efficiency is high, and the incision is better.

[0046] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0047] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.

[0048] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present application and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present application.

[0049] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0050] Although multiple embodiments of the present application have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided only by way of example. Those skilled in the art can think of many changes, modifications and alternatives without departing from the thought and spirit of the present application. It should be understood that in the process of practicing the present application, various alternatives to the embodiments of the present application described herein can be adopted. The attached claims are intended to limit the scope of protection of the present application, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A laminating mechanism, characterized in that: The laminating mechanism comprises: A mounting seat, wherein a sliding seat and a driving mechanism are arranged on the mounting seat; A plurality of transmission rollers are arranged in pairs on a sliding seat, a gap is formed between each pair of the transmission rollers for transmitting the diaphragm along a first direction, and the diaphragm is guided to the stacking table and stacked with the pole piece after passing through the gap, and the driving mechanism drives the sliding seat and the plurality of transmission rollers to move along a second direction to correct the transmission path of the diaphragm, and the second direction is the length direction of the transmission rollers.

2. The laminating mechanism according to claim 1, characterized in that: The sliding seat comprises: A guide rail, disposed on the mounting seat and extending along the second direction; The roller frame is slidably mounted on the guide rail and driven by the driving mechanism to slide on the guide rail. The transmission rollers are arranged in pairs on the roller frame.

3. The laminating mechanism according to claim 2, characterized in that: The coating mechanism further comprises a light curtain sensor, which is arranged on the mounting seat. The side edge of the diaphragm passes through the sensing area of ​​the light curtain sensor, and the light curtain sensor is used to detect the position of the side edge of the diaphragm.

4. The laminating mechanism according to claim 3, characterized in that: There are two pairs of transmission rollers, which are spaced apart from each other. The diaphragm is transmitted through the gaps between the upper and lower pairs of transmission rollers respectively, and the light curtain sensor is located between the two pairs of transmission rollers.

5. The laminating mechanism according to claim 4, characterized in that: There are two light curtain sensors, which are arranged at intervals in the transverse direction and are respectively used to detect the positions of the two side edges of the diaphragm. The interval between the two light curtain sensors is smaller than the width of the diaphragm.

6. The laminating mechanism according to claim 1, characterized in that: The driving mechanism comprises: Drive motor; A lead screw has one end rotatably arranged on the mounting seat, and the other end can be driven to rotate by the driving motor, and a ball screw sleeve with thread matching is provided on the lead screw, and the ball screw sleeve is connected to the sliding seat.

7. The laminating mechanism according to any one of claims 1 to 6, characterized in that: The film-coating mechanism further comprises a film-cutting assembly for cutting the diaphragm, wherein the film-cutting assembly is arranged on the mounting seat and is located on one side of the sliding seat.

8. The laminating mechanism according to claim 7, characterized in that: The film cutting assembly comprises: A film cutting lifting mechanism is arranged on the mounting seat; A cutting bracket connected to the film cutting lifting mechanism and driven by the film cutting lifting mechanism to adjust the distance between the cutting bracket and the diaphragm; A cutting element is disposed at the bottom of the cutting support and is used to perform cutting of the diaphragm.

9. The laminating mechanism according to claim 8, characterized in that: The film cutting lifting mechanism comprises a telescopic cylinder, a piston rod of which is connected to the cutting bracket and drives the cutting bracket to reciprocate along a first direction.

10. The laminating mechanism according to claim 8, characterized in that: The cutting element includes a hot cutting wire; or the cutting element includes a blade and a heating resistance wire arranged on the blade.

Images