Discharging device and lamination equipment

Abstract

The present invention relates to the field of battery technology, and proposes a discharging device and stacking equipment. The discharging device includes: a discharging mechanism, wherein the discharging mechanism includes a first wheel body and a second wheel body arranged with parallel axes, and a discharging port is formed between the first wheel body and the second wheel body; the second wheel body adsorbs the diaphragms between adjacent battery cells in the material strip discharged from the discharging port. The discharging device provided in the present application has an adsorption function by providing the second wheel body, and can reversely pull the diaphragms between adjacent battery cells when the material strip passes through the discharging port, thereby improving the flatness of the diaphragms between adjacent battery cells in the stacking structure.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a discharging device and a lamination device. Background Art

[0002] The cell structure is a key technical feature of a battery. It consists of several stacked cells separated by separators. Before the cells are stacked to form the cell structure, a strip of material containing multiple cells and separators must be transported through a dispensing device and then stacked on a receiving table. However, the dispensing method of existing dispensing devices makes it difficult to ensure the smoothness of the separators between adjacent cells in the cell structure.

[0003] Therefore, there is an urgent need to provide a discharging device that can improve the flatness of the cell unit separator in the cell structure. Summary of the Invention

[0004] The present application provides a discharging device and a lamination device to improve the flatness of a cell unit separator in a cell structure.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] According to the first aspect of the present application, a discharging device is provided, comprising: a discharging mechanism, the discharging mechanism comprising a first wheel body and a second wheel body with parallel axis lines, a discharging port being formed between the first wheel body and the second wheel body; the second wheel body adsorbs the diaphragm between adjacent battery cell units in the material strip discharged from the discharging port.

[0007] The discharging device provided in the present application has an adsorption function by setting a second wheel body, which can pull the diaphragm between adjacent battery cells in the opposite direction when the material belt passes through the discharging port, so as to improve the flatness of the diaphragm between adjacent battery cells in the stacking structure.

[0008] In one embodiment of the present application, the discharging device provided in the present application also includes a guide limiting mechanism, the guide limiting mechanism having a guide limiting channel for limiting the position of the diaphragm after the second wheel body adsorbs, the guide limiting channel is arranged on the side of the second wheel body away from the first wheel body, and at least part of the guide limiting channel is located on the feed side of the discharging port; the guide limiting channel is provided with an inlet, and the inlet is located on the discharge side of the discharging port.

[0009] In one embodiment of the present application, the guide and limiting mechanism includes a first baffle and a second baffle arranged opposite to each other, the first baffle is located on the side of the second baffle away from the second wheel body, the first baffle and the second baffle cooperate to form the guide and limiting channel, the first baffle forms a first limiting surface toward the side of the second baffle, and the second baffle forms a second limiting surface toward the side of the first baffle.

[0010] In one embodiment of the present application, along the direction from the feed side of the discharging port to the discharge side, at least a portion of the first baffle exceeds a first plane, and the first plane is a vertical plane passing through the axis of the second wheel body.

[0011] In one embodiment of the present application, one end of the first baffle extending beyond the first plane has a curved surface.

[0012] In one embodiment of the present application, along the direction from the feed side of the discharge port to the discharge side, the second baffle does not exceed the first plane; the edge of the second limiting surface facing the side of the second wheel body is not higher than the second plane, and the second plane is a horizontal plane passing through the axis of the second wheel body.

[0013] In one embodiment of the present application, an edge of the second limiting surface facing the second wheel body is located between the second plane and the first limiting surface.

[0014] In one embodiment of the present application, the guide and limit mechanism further includes a third baffle, one end of the third baffle is connected to the first baffle, and the other end of the third baffle is connected to the second baffle to close the opening on one side of the guide and limit channel.

[0015] In one embodiment of the present application, the discharging device provided in the present application also includes a blowing mechanism, which is located on the discharge side of the discharging port and is arranged on the side of the material belt away from the second wheel body, so as to change the movement path of the separator between adjacent battery cell units.

[0016] According to a second aspect of the present application, a lamination device is provided, comprising any one of the discharging devices provided by the above technical solutions.

[0017] The discharging device in the stacking equipment provided in the present application has an adsorption function by setting a second wheel body, which can pull the diaphragm between adjacent battery cell units in the opposite direction when the material belt passes through the discharging port, so as to improve the flatness of the diaphragm between adjacent battery cell units in the stacking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For a better understanding of the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0019] Figure 1 A schematic diagram of the structure of the material strip provided in an embodiment of the present application;

[0020] Figure 2 A schematic structural diagram of a discharging device provided in an embodiment of the present application;

[0021] Figure 3 for Figure 2 Schematic diagram of the diaphragm after movement;

[0022] Figure 4 This is another structural schematic diagram of the discharging device provided in an embodiment of the present application.

[0023] The following are the descriptions of the reference numerals:

[0024] 01-battery cell unit; 011-middle diaphragm; 012-first pole piece; 013-second pole piece; 02-diaphragm; 1-first wheel body; 2-second wheel body; 3-first baffle; 4-second baffle; 5-third baffle; 6-blowing mechanism. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In order to more clearly understand the structure of the discharging device provided in the embodiment of the present application, the material strip structure and the battery cell structure are now described. The material strip contains multiple Figure 1 The illustrated battery cell units 01 are spaced apart from each other along the extension direction of the material strip and connected by a separator 02. It should be understood that each battery cell unit 01 includes a central separator 011 and a first electrode piece 012 and a second electrode piece 013 disposed on either side of the central separator 011, wherein the first electrode piece 012 and the second electrode piece 013 have opposite polarity. When the first electrode piece 012 is a positive electrode piece, the second electrode piece 013 is a negative electrode piece. Conversely, when the first electrode piece 012 is a negative electrode piece, the second electrode piece 013 is a positive electrode piece. It is worth noting that the central separator 011 in the battery cell unit 01 and the separator 02 between adjacent battery cell units 01 are a continuous structure. After the material strip is discharged by the discharging device, several battery cell units 01 are stacked to form a battery cell structure.

[0027] In a first aspect, an embodiment of the present application provides a discharging device. Figure 2 This is a schematic diagram of the structure of the discharging device provided in the embodiment of this application. Please refer to Figure 2The structure shown in the figure shows a discharging device comprising a discharging mechanism. The discharging mechanism comprises a first wheel 1 and a second wheel 2, whose axes are arranged parallel to each other. A discharging opening is formed between the first wheel 1 and the second wheel 2. It should be understood that the first wheel 1 and the second wheel 2 rotate in opposite directions. Furthermore, it is worth noting that the surfaces of the first wheel 1 and the second wheel 2 can be in close contact before the material strip enters between them. After the material strip enters between the first wheel 1 and the second wheel 2, a discharging opening is formed between the first wheel 1 and the second wheel 2.

[0028] Please refer to Figure 2 In the structure shown, the second wheel 2 absorbs the separator 02 between adjacent battery cells 01 in the material strip discharged from the discharge port. It is worth noting that the second wheel 2 can achieve the absorption effect through electrostatic or vacuum functions. Exemplarily, the second wheel 2 is an electrostatic absorption wheel or a vacuum absorption wheel.

[0029] For the sake of convenience, the second wheel body 2 is exemplarily arranged below the first wheel body 1, and the first wheel body 1 and the second wheel body 2 are arranged in a vertical direction, and the material discharging direction of the material discharging port is obliquely downward direction c. It should be understood that the material discharging direction of the material discharging port is not limited to Figure 2 The direction c shown in the figure can, of course, be set to the direction of discharging upward or in any direction according to the needs. The details will not be repeated here. In addition, the position of the second wheel body 2 is not limited to below the material belt. The second wheel body 2 can also be set above the material belt according to the needs. As for the arrangement direction of the first wheel body 1 and the second wheel body 2, it is not limited to Figure 1 The vertical arrangement shown in the figure can adjust the setting positions of the first wheel body 1 and the second wheel body 2 according to needs.

[0030] like Figure 2 As shown, the first wheel body 1 is the driving wheel and the second wheel body 2 is the driven wheel. Of course, the driving properties of the first wheel body 1 and the second wheel body 2 are not limited to the above examples and can be set according to needs, which will not be repeated here. It is worth noting that Figure 2 Among them, M1 is a vertical plane passing through the axis of the second wheel body 2, that is, the first plane, and M2 is a horizontal plane passing through the axis of the second wheel body 2, that is, the second plane.

[0031] For the convenience of description, Figure 2 The discharging direction shown in FIG is used for exemplary description.

[0032] Please continue to refer to Figure 2 In the structure shown, after the previous battery cell 01 is ejected from the ejection port, the diaphragm 02 between the previous battery cell 01 and the next battery cell 01 that has not been ejected from the ejection port will be adsorbed by the second wheel body 2. While the second wheel body 2 adsorbs the diaphragm 02, the second wheel body 2 applies a reverse force to the diaphragm 02, causing the diaphragm 02 to move in the opposite direction. At this time, the diaphragm 02 is Figure 2The status shown changes to Figure 3 Status shown.

[0033] When the battery cell unit 01 is discharged from the discharge port, a force is applied in the direction c, causing the battery cell unit 01 to move in the direction c after moving out of the discharge port. The direction c can be decomposed into a horizontal rightward direction c1. If the second wheel body 2 does not have an adsorption function, the diaphragm 02 will move away from the second wheel body 2 along the direction c1 along with the previous battery cell unit 01. Since the second wheel body 2 in the discharge device provided in the embodiment of the present application has an adsorption function, when the second wheel body 2 rotates in the direction of the arrow b, a force in the opposite direction of c1 will be applied to the diaphragm 02, causing the diaphragm 02 to move in the opposite direction of c1. Of course, the power applied by the second wheel body 2 to the diaphragm 02 can be decomposed into a power in the opposite direction of c1, and is not limited to applying power only in the opposite direction of direction c1.

[0034] Specifically, the previous battery cell unit 01 moves along the direction of c1, and at this time, the diaphragm 02 connected to it is pulled, so that the end of the diaphragm 02 close to the previous battery cell unit 01 moves along the direction c1, and the diaphragm 02 close to the second wheel body 2 is adsorbed by the second wheel body 2 and moves in the opposite direction of c1. For example, the diaphragm 02 can be Figure 2 The status changes to Figure 3 Middle state; after the rear battery cell unit 01 is discharged from the discharge port, the diaphragm 02 connected to the front end of the rear battery cell unit 01 moves along the direction c with the rear battery cell unit 01. At this time, the end of the diaphragm 02 connected to the rear battery cell unit 01 is pulled and flattened along the direction c1; when the rear battery cell unit 01 is stacked on the front battery cell unit 01, the diaphragm 02 is laid between the two adjacent battery cell units 01 to play a barrier role.

[0035] It should be noted that the discharging device provided in the embodiment of the present application has an adsorption function by setting a second wheel body 2, which can reversely pull the diaphragm 02 between adjacent battery cell units 01 when the material belt passes through the discharging port, so as to improve the flatness of the diaphragm 02 between adjacent battery cell units 01 in the stacking structure.

[0036] In one embodiment of the present application, the discharging device provided in the embodiment of the present application further includes a guide limiting mechanism, and the guide limiting mechanism has a guide limiting channel P for limiting the position of the diaphragm 02 after the second wheel body 2 adsorbs. The guide limiting channel P is provided on the side of the second wheel body 2 away from the first wheel body 1, and the guide limiting channel P is provided with an inlet, which is located on the discharge side of the discharging port. It should be understood that one side of the discharging port is the feed side, so that the material belt enters the discharging port, and the other side of the discharging port is the discharge side, so that the material belt can be stacked after being discharged. For example, the material belt is stacked on the receiving table A. It is worth noting that since the discharging direction of the discharging port is arbitrarily possible in the circumferential direction of the second wheel body 2, the guide limiting mechanism can be set at any position along the discharging direction and the circumferential direction of the second wheel body 2. Figure 2 This is only an illustrative description and is not intended to be limiting.

[0037] It should be noted that after the diaphragm 02 enters the guide limiting channel P, the guide limiting channel P can limit the active area of ​​the diaphragm 02 and guide it to prevent the diaphragm 02 from rotating with the second wheel body 2 and entering the discharge port from the feed side again, or the diaphragm 02 falls down due to gravity and cannot be adsorbed by the second wheel body 2 and moves in the opposite direction of direction c1, thereby improving the success rate of flattening the diaphragm 02, reducing the probability of shutdown for maintenance, and improving production efficiency.

[0038] It is worth noting that the extension direction of the guide limit channel P is not limited to Figure 2 The direction shown in the figure can be used to set the extension direction of the guide limit channel P according to needs, and will not be repeated here.

[0039] In one embodiment, for example, please refer to Figure 2 In the illustrated structure, the guide and limit mechanism includes a first baffle 3 and a second baffle 4 arranged opposite each other. The first baffle 3 is located on the side of the second baffle 4 away from the second wheel body 2. The first baffle 3 and the second baffle 4 cooperate to form a guide and limit passage P. Specifically, the first baffle 3 forms a first limit surface on the side facing the second baffle 4, and the second baffle 4 forms a second limit surface on the side facing the first baffle 3.

[0040] It should be noted that the first limiting surface is used to limit the maximum vertical downward movement distance of the diaphragm 02, preventing the diaphragm 02 from falling continuously due to gravity and being unable to move in the opposite direction with the second wheel body 2. The second limiting surface is used to limit the maximum vertical upward movement distance of the diaphragm 02, which can prevent the diaphragm 02 from rotating with the second wheel body 2 and reentering the discharge port from the feed side. At the same time, the first limiting surface and the second limiting surface cooperate to form a guide channel. Obviously, the cooperation between the first limiting surface and the second limiting surface can improve the success rate of flattening the diaphragm 02, reduce the probability of downtime for maintenance, and improve production efficiency.

[0041] It is worth noting that after the previous battery cell unit 01 is discharged from the discharge port, the diaphragm 02 may first fall and contact the first baffle 3. The first limiting surface of the first baffle 3 is limited, so that the diaphragm 02 enters the guide limiting channel P from the inlet. After part of the diaphragm 02 is stacked in the guide limiting channel P, part of the upper diaphragm 02 (the diaphragm 02 close to the second wheel body 2) is adsorbed by the second wheel body 2 and moves in the opposite direction of c1 to achieve the reverse pulling of the diaphragm 02 by the second wheel body 2, thereby achieving the flattening effect of the diaphragm 02 between adjacent battery cell units 01 in the stacking structure.

[0042] In one embodiment, along the feed side of the discharge port, at least a portion of the first baffle 3 extends beyond the first plane M1. It should be noted that by providing at least a portion of the first baffle 3 extending beyond the first plane M1, the diaphragm 02 can be guaranteed to contact the first baffle 3 during its descent, thereby increasing the success rate of the diaphragm 02 entering the guide and limiting passage P.

[0043] In one embodiment, to prevent the diaphragm 02 from being cut by the edge of the first baffle 3 when it contacts it, resulting in the diaphragm 02 being unable to effectively isolate adjacent battery cells 01 in the subsequent battery cell structure, the end of the first baffle 3 that extends beyond the first plane M1 can be provided with a curved surface to improve the smoothness of the end of the first baffle 3 that receives the diaphragm 02. Of course, the end of the second baffle 4 that faces the second wheel body 2 can also have a curved surface, which will not be further described here.

[0044] Since the second limiting surface is used to limit the maximum moving distance of the diaphragm 02 in the vertical direction and upward, in order to better prevent the diaphragm 02 from entering the discharge port again with the second wheel body 2, it can be set in one embodiment that the second baffle 4 does not exceed the first plane M1 along the feed side of the discharge port pointing to the discharge side.

[0045] It should be noted that the first baffle 3 and the second baffle 4 are not limited to Figure 2 In the horizontal arrangement shown in FIG, the first baffle 3 and / or the second baffle 4 may have an angle with the horizontal plane. For example, the second baffle 4 may be as follows: Figure 4 When the second limiting surface is inclined, it is necessary to ensure that the edge of the second limiting surface facing the second wheel body 2 is not higher than the second plane M2; when the second limiting surface is a horizontal plane, it is necessary to ensure that the entire second limiting surface is not higher than the second plane M2.

[0046] Taking the horizontal arrangement of the second baffles 4 as an example, in one possible embodiment, the second limiting surface coincides with the second plane M2, i.e., the plane in which the second limiting surface is located passes through the axis of the second wheel body 2. In another possible embodiment, the edge of the second limiting surface facing the second wheel body 2 is located between the second plane M2 and the first limiting surface.

[0047] It is worth noting that, along the vertical direction, a distance h can be set between the edge of the second limiting surface facing the second wheel body 2 and the lowest point of the second wheel body 2, where 0 ≤ h < 2 mm. It should be understood that the smaller the value of h, the closer the second limiting surface is to the lowest point of the second wheel body 2. For example, h can be 0 mm, 0.5 mm, 1 mm, 1.5 mm, etc.

[0048] A horizontal gap L can also be provided between the edge of the second limiting surface facing the second wheel body 2 and the second wheel body 2, with the range of L being 0mm < L < 0.5mm. When the value of L is too small, if there is foreign matter such as glue on the surface of the second wheel body 2, the second baffle 4 may interfere with the surface of the second wheel body 2, affecting the normal rotation of the second wheel body 2. When the value of L is too large, the second baffle 4 may not be able to effectively block the diaphragm 02, and the diaphragm 02 may pass through the gap between the second baffle 4 and the surface of the second wheel body 2. For example, L can be 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.45mm.

[0049] It should be noted that the h value affects the separation point between the diaphragm 02 and the second wheel body 2, thereby affecting the flattening effect of the diaphragm 02 in the subsequent stacking structure. Therefore, the values ​​of h and L can be selected according to needs. For example, the range of L is set to 0.1mm≤L≤0.4mm, and the range of h is set to 0.5≤h<1.5mm. It should be understood that when the values ​​of h and L are selected within the above ranges, the flattening effect of the diaphragm 02 in the stacking structure can be improved.

[0050] It is worth noting that when the first baffle 3 is Figure 2 The horizontal arrangement shown, and the second baffle 4 is as shown Figure 2 When shown in the horizontal setting, along the vertical direction, the distance between the first limiting surface of the first baffle 3 and the second limiting surface of the second baffle 4 is D. The D value can be set according to demand to change the size of the guide limiting channel P along the vertical direction, thereby limiting the activity space of the diaphragm 02.

[0051] In one embodiment of the present application, the guide limit mechanism also includes a third baffle 5, one end of the third baffle 5 is connected to the first baffle 3, and the other end of the third baffle 5 is connected to the second baffle 4 to close the opening on one side of the guide limit channel P to prevent the diaphragm 02 from moving out from the opening on this side.

[0052] In one embodiment of the present application, the discharging device provided in the embodiment of the present application also includes a blowing mechanism 6, which is located on the discharge side of the discharging port and is arranged on the side of the material belt away from the second wheel body 2, so as to change the movement path of the spacer membrane 02 between adjacent battery cell units 01.

[0053] It should be noted that the discharging device provided in the embodiment of the present application changes the moving path of the diaphragm 02 through the blowing mechanism 6, so that the diaphragm 02 can be better adsorbed by the second wheel body 2, thereby improving the success rate of the second wheel body 2 adsorbing the diaphragm 02, thereby improving the success rate of flattening the diaphragm 02 and reducing the probability of shutdown for maintenance, thereby improving production efficiency.

[0054] Exemplarily, the blowing mechanism 6 may include one or more blowing nozzles. In one embodiment, the blowing mechanism 6 includes multiple nozzles, and the multiple nozzles are spaced apart and parallel to the axis of the second wheel body 2. It should be understood that in one possible embodiment, the multiple nozzles can be selectively opened and closed so that the blowing mechanism 6 selectively blows the diaphragm 02. Alternatively, the blowing mechanism 6 can be kept open, and the blowing volume can be controlled so that the blowing mechanism 6 continuously blows the diaphragm 02.

[0055] It is worth noting that the closer the blowing mechanism 6 is to the diaphragm 02, the greater the force exerted by the blowing mechanism 6 on the diaphragm 02 under the same air output conditions. Conversely, under the same force conditions, the air output of the blowing mechanism 6 can be reduced.

[0056] In a second aspect, an embodiment of the present application provides a lamination device, comprising any one of the discharging devices provided by the above technical solutions.

[0057] It should be noted that the discharging device in the stacking equipment provided in the embodiment of the present application has an adsorption function by setting a second wheel body 2, which can reversely pull the diaphragm 02 between adjacent battery cell units 01 when the material belt passes through the discharging port, so as to improve the flatness of the diaphragm 02 between adjacent battery cell units 01 in the stacking structure.

[0058] Of course, the lamination arrangement may also include Figure 2 The material receiving platform A and other structures shown are not described in detail here.

[0059] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A discharging device, characterized in that: include: The discharging mechanism includes a first wheel body and a second wheel body with parallel axis lines, and a discharging port is formed between the first wheel body and the second wheel body; the second wheel body absorbs and reversely pulls the diaphragm between adjacent battery cell units in the material strip discharged from the discharging port.

2. The discharging device according to claim 1, characterized in that: It also includes a guide and limiting mechanism, which has a guide and limiting channel for limiting the position of the diaphragm after the second wheel body adsorbs it, and the guide and limiting channel is arranged on the side of the second wheel body away from the first wheel body, and at least part of the guide and limiting channel is located on the feed side of the discharging port; the guide and limiting channel is provided with an inlet, and the inlet is located on the discharge side of the discharging port.

3. The discharging device according to claim 2, characterized in that: The guide and limiting mechanism includes a first baffle and a second baffle arranged opposite to each other, the first baffle is located on the side of the second baffle away from the second wheel body, the first baffle and the second baffle cooperate to form the guide and limiting channel, the first baffle forms a first limiting surface toward the side of the second baffle, and the second baffle forms a second limiting surface toward the side of the first baffle.

4. The discharging device according to claim 3, characterized in that: Along the direction from the feeding side of the discharging port to the discharging side, at least a portion of the first baffle exceeds a first plane, and the first plane is a vertical plane passing through the axis of the second wheel body.

5. The discharging device according to claim 4, characterized in that: One end of the first baffle extending beyond the first plane has a curved surface.

6. The discharging device according to claim 4, characterized in that: Along the feeding side of the discharging port pointing to the discharging side, the second baffle does not exceed the first plane; the edge of the second limiting surface facing the side of the second wheel body is not higher than the second plane, and the second plane is a horizontal plane passing through the axis of the second wheel body.

7. The discharging device according to claim 6, characterized in that: An edge of the second limiting surface facing the second wheel body is located between the second plane and the first limiting surface.

8. The discharging device according to claim 3, characterized in that: The guide and limiting mechanism further includes a third baffle, one end of which is connected to the first baffle, and the other end of which is connected to the second baffle, so as to close an opening on one side of the guide and limiting channel.

9. The discharging device according to any one of claims 1 to 8, characterized in that: It also includes a blowing mechanism, which is located on the discharge side of the discharge port and is arranged on the side of the material belt away from the second wheel body, for changing the movement path of the spacer membranes of adjacent battery cell units.

10. A lamination device, characterized in that: It comprises the discharging device according to any one of claims 1 to 9.

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