Forming device, lamination equipment and battery production line

Abstract

The forming device comprises a plurality of connecting pieces, a plurality of forming partition plates and a variable pitch structure. The adjacent forming partition plates are connected through the connecting pieces, and sheet materials are inserted between the adjacent forming partition plates. The variable-pitch structure is used for enabling the forming partition plate to move in the first direction so that the spacing distance between the adjacent sheet materials can be reduced, the connecting piece is used for limiting the sheet materials in the second direction, and the first direction is perpendicular to the second direction. When the forming device with the structure is used for laminating, the laminating efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a forming device, lamination equipment and a battery production line. Background Art

[0002] In the field of battery manufacturing, stacking is one of the important process steps. The stacking method in the existing technology requires the positive electrode sheets, diaphragms and negative electrode sheets to be stacked layer by layer in sequence. In order to ensure the stacking yield, the stacking process requires the relative positions of the positive electrode sheets, diaphragms and negative electrode sheets to be accurate. Therefore, the electrode positions need to be corrected when stacking layer by layer. Therefore, the stacking efficiency is low and cannot meet the current battery manufacturing efficiency requirements. Summary of the Invention

[0003] The purpose of this application is to provide a lamination method to solve the technical problem of low lamination efficiency in the prior art.

[0004] To achieve the purpose of this application, this application provides the following technical solutions:

[0005] In the first aspect, the present application provides a forming device, which includes multiple connecting plates, multiple forming partitions and a variable distance structure; the connecting plates connect adjacent forming partitions, and are used to insert sheet materials between adjacent forming partitions; the variable distance structure is used to move the forming partitions in a first direction to reduce the spacing distance between adjacent sheet materials, and the connecting plates are used to limit the sheet materials in a second direction, and the first direction and the second direction are perpendicular to each other.

[0006] In the forming device provided by the present application, by inserting sheets between the forming baffles and reducing the spacing between the forming baffles through a variable distance structure to reduce the spacing between the sheets, the sheets are compressed. Compared with the prior art method of laying sheets layer by layer, the inserting and laminating method in the present application can compress and laminate multiple sheets at the same time, effectively improving the efficiency of lamination. In addition, since the sheets are inserted into the forming device, and the connecting piece can limit the position of the sheets in the second direction when the forming baffles move in the first direction, the forming device uses the weight of the sheets themselves combined with the limiting effect of the connecting piece to act as a position reference when accommodating the sheets inserted therein. That is, the forming device corrects the deviation of the sheets in at least one direction, thus omitting the correction action in at least one direction, thereby effectively saving the lamination time and further improving the lamination efficiency.

[0007] In one possible embodiment, the forming device is suitable for stacking a first sheet material and a second sheet material, the difference between the width of the first sheet material and the width of the second sheet material is a, the connecting piece includes a first connecting piece and a second connecting piece arranged in sequence between the forming partitions, the first connecting piece is used to support the first sheet material, and the second connecting piece is used to support the second sheet material; when the variable distance structure is in an expanded state, multiple first connecting pieces are in the same plane in the second direction and multiple second connecting pieces are in the same plane in the second direction, the spacing distance between the first connecting piece and the second connecting piece in the second direction is h and a>h>0.

[0008] In the forming device provided in the present application, by designing the spacing distance between the first connecting piece and the second connecting piece in the second direction, the supported first sheet material and the second sheet material can be staggered accordingly in the second direction according to the stacking requirements. That is, when the first connecting piece and the second connecting piece support and insert the two sheets in the forming device, the two sheets are corrected in the second direction at the same time so that they can meet the subsequent pressing requirements, thereby improving the stacking efficiency.

[0009] In one possible implementation, 2 / 3a>h>1 / 3a.

[0010] In one possible implementation, h=1 / 2a.

[0011] In the forming device provided in the present application, by designing the relationship between the spacing distance h between the first connecting piece and the second connecting piece in the second direction and the difference a between the width of the first sheet and the width of the second sheet, the edge misalignment size between the two sheets inserted in the forming device can meet the subsequent direct compression of the sheet stacking requirements.

[0012] In one possible implementation, the connecting piece is made of a flexible material, and deforms downward in the direction of gravity when supporting the first sheet and the second sheet; and as the forming partition moves in the first direction, the deformation of the connecting piece in the direction of gravity changes.

[0013] In the forming device provided in the present application, the connecting piece is made of a flexible material, which can play a buffering role, and the deformation of the connecting piece in the direction of gravity changes with the movement of the forming partition, so that the connecting piece arranged between the forming partitions does not affect the forming device to press the sheet material.

[0014] In a possible implementation, the connecting piece is made of a rigid material, and when the formed partition moves in the first direction, the first connecting piece and the second connecting piece are both in the original plane in the second direction.

[0015] In the forming device provided in the present application, the material of the connecting piece is a rigid material, and when the forming partition moves in the first direction, the first connecting piece and the second connecting piece do not change in the second direction, so that the position of the supported sheet material in the second direction can always be kept relatively constant, thereby playing a role in correcting the edge of the sheet material in the second direction.

[0016] In one possible embodiment, the variable pitch structure includes a first side plate and a second side plate, multiple connecting plates and multiple forming partitions are arranged between the first side plate and the second side plate, and the first side plate and the second side plate move relative to each other in a first direction to drive the forming partition to move relative to each other in the first direction.

[0017] In one possible implementation, the distance between any two adjacent forming partitions is a forming distance C, and the first side plate moves toward the second side plate to reduce the forming distance C, or the first side plate moves away from the second side plate to increase the forming distance C.

[0018] In a possible implementation, the variable distance structure further includes a guide member, which limits the movement of the shaped partition along the first direction.

[0019] In the forming device provided in the present application, a guide member is provided to ensure that the forming partition moves only along the first direction, that is, the sheet material inserted in the forming device is limited to move only along the first direction, thereby realizing the pressing function of the forming device on the sheet material.

[0020] In a possible implementation, the guide member includes a guide rod arranged along the first direction, and the guide rod is connected to each forming baffle to limit the forming baffle to move along the guide rod in the first direction.

[0021] In one possible implementation, at least two layers of guide rods are provided in the second direction.

[0022] In a possible implementation, at least two groups of guide rods are provided in the third direction, and the third direction is perpendicular to both the first direction and the second direction.

[0023] In one possible implementation, at least three groups of guide rods are provided in the third direction, the two groups of guide rods at both ends are symmetrically arranged, and the number of guide rods in the middle group is greater than the number of guide rods in any group of guide rods at both ends.

[0024] In a second aspect, the present invention provides a lamination device, which includes the forming device provided in the first aspect.

[0025] In a third aspect, the present invention provides a battery production line, which includes the forming device provided in the first aspect and / or the lamination equipment provided in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a schematic structural diagram of a first sheet and a second sheet in some embodiments;

[0028] Figure 2 is a schematic structural diagram of the first sheet and the second sheet in other embodiments;

[0029] Figure 3 This is the lamination method process of the embodiment of the present application Figure 1 ;

[0030] Figure 4 This is the lamination method process of the embodiment of the present application Figure 2 ;

[0031] Figure 5 is a schematic diagram of the working mode of the transfer tray in some embodiments;

[0032] Figure 6-8 is a schematic diagram of the working mode of the tray device in some embodiments;

[0033] Figure 9-11 is a schematic diagram of the coordination between the material loading tray and the forming device in some embodiments;

[0034] Figure 12-13 is a schematic diagram of the working mode of the forming device in some embodiments;

[0035] Figure 14-15 It is a schematic diagram of the coordination between the forming device and the blanking device in some embodiments.

[0036] Description of reference numerals:

[0037] 1- lamination equipment; 100- first sheet; 200- second sheet; 300- initially formed pole core;

[0038] 11-forming device; 12-feeding tray device; 13-feeding device;

[0039] 111-connecting piece; 112-forming partition; 113-variable pitch structure; 121-loading tray; 122-transfer tray;

[0040] 1111 - first connecting piece; 1112 - second connecting piece; 1131 - first side plate; 1132 - second side plate; 1133 - guide rod; 1221 - transfer bottom plate; 1222 - transfer partition; 1223 - transfer trough;

[0041] 1211-supporting part; 1212-displacement part; 1213-connecting part; 12221-first transfer partition; 12222-second transfer partition; 12231-first transfer trough; 12232-second transfer trough;

[0042] 12111-loading bottom plate; 12112-loading partition plate; 12113-loading trough;

[0043] 121121-first loading partition; 121122-second loading partition; 121131-first loading trough; 121132-second loading trough. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0045] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0046] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "axial", "circumferential", "left", "inner" and "outer" is based on the orientation or positional relationship described in the accompanying drawings, and is only for the convenience of describing the present invention 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 present invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0051] To facilitate understanding of the solution, a brief description of the first sheet 100 and the second sheet 200 is given here. Figure 1-2 The first sheet material and the second sheet material refer to sheet materials such as pole sheet material and diaphragm material required in the lamination process.

[0052] Preferably, since the intercalation stacking method has certain requirements for the rigidity of the sheet materials, at least one of the first sheet and the second sheet is a composite electrode sheet with a separator, so as to realize the multi-layer structure of "separator-negative electrode-separator-positive electrode-separator" required for the stacking process after the first sheet and the second sheet are pressed together. For example, if one of the first sheet and the second sheet is a composite negative electrode sheet with separators on both opposite sides, the other is a positive electrode sheet; if one of the first sheet and the second sheet is a composite positive electrode sheet with separators on both opposite sides, the other is a negative electrode sheet; if one of the first sheet and the second sheet is a composite negative electrode sheet with a separator on one side, the other is a composite positive electrode sheet with a separator on the same side. However, this does not limit the first sheet and the second sheet to not being separators, as long as the separator can meet the rigidity requirements of the intercalation stacking method. For ease of description, the following embodiments are described by taking as an example an example that one of the first sheet and the second sheet is a composite negative electrode sheet with separators composited on both opposite sides, and the other is a positive electrode sheet.

[0053] In addition, the shape of the sheet is not limited and can be any desired shape such as a rectangle, square, circle, trapezoid or parallelogram. In the embodiments of the present application, for ease of description, the sheet is taken as an example for description, but the shape of the sheet is not limited to being only a rectangle.

[0054] This application embodiment provides a lamination method, please combine Figure 3-15 , the lamination method comprises the following steps:

[0055] Step S1: a plurality of first sheets 100 and a plurality of second sheets 200 are sequentially inserted into a forming device 11 at intervals along the X direction, with sheet gaps existing between adjacent first sheets 100 and second sheets 200. The X direction is a horizontal direction.

[0056] In step S2 , the forming device 11 is activated to reduce the sheet gap along the X direction; when the sheet gap is reduced to a first preset range, the first sheet 100 and the second sheet 200 are separated from the forming device 11 to form a pre-formed pole core 300 .

[0057] In the lamination method provided in the embodiment of the present application, the first sheet 100 and the second sheet 200 with a gap between the sheets are inserted into the forming device 11 in sequence and at intervals, and the forming device 11 is operated to reduce the gap between the sheets in the horizontal direction, that is, the multiple first sheets 100 and the multiple second sheets 200 inserted therein are compressed. When the gap between the sheets is reduced to within a first preset range, the forming device 11 is separated from the sheets to obtain the compressed initial formed pole core 300.

[0058] In addition, since the first sheet 100 and the second sheet 200 are inserted into the forming device 11, the forming device 11 can serve as a position reference, that is, the forming device 11 corrects the deviation of the first sheet 100 and the second sheet 200 in at least one direction, thus saving the correction action in at least one direction. Compared with the prior art, which requires a correction for each sheet to be stacked, the present application effectively improves the stacking efficiency. In addition, in the stacking method of the present application, the operation of the forming device 11 can simultaneously compress multiple first sheets 100 and multiple second sheets 200, thereby further improving the stacking efficiency and saving stacking time.

[0059] In the above step S1 , the first sheet material 100 and the second sheet material 200 are inserted into the forming device 11 in sequence and at intervals along the horizontal direction, that is, the first sheet material 100 and the second sheet material 200 are arranged in layers in sequence along the thickness direction of the sheet material.

[0060] Optionally, the forming device 11 supports the first sheet 100 and the second sheet 200 in the direction of gravity, or the forming device 11 pulls and suspends the first sheet 100 and the second sheet 200 in the direction of gravity. As long as the forming device 11 can limit the first sheet 100 and the second sheet 200 inserted therein in the direction of gravity, it will be sufficient.

[0061] In some preferred embodiments, the first connecting piece 1111 of the forming device 11 supports the first sheet material 100 in the Y direction, and the second connecting piece 1112 of the forming device 11 supports the second sheet material 200 in the Y direction. Furthermore, before the first sheet material 100 and the second sheet material 200 are placed in the forming device 11, the distance between the first connecting piece 1111 and the second connecting piece 1112 in the Y direction is h, and h>0. It should be noted that the Y direction is the direction of gravity and the width direction of the first sheet material 100 and the second sheet material 200.

[0062] In the stacking method provided in the embodiment of the present application, the first connecting piece 1111 supports the first sheet material 100 and the second connecting piece 1112 supports the second sheet material 200. Before the forming device 11 supports the first sheet material 100 and the second sheet material 200, the first connecting piece 1111 and the second connecting piece 1112 are spaced apart in the direction of gravity, that is, the first connecting piece 1111 and the second connecting piece 1112 are on different preset horizontal planes. When supporting the first sheet material 100 and the second sheet material 200, the bottom end of the first sheet material 100 and the bottom end of the second sheet material 200 are also on different preset horizontal planes. Therefore, by utilizing the gravity of the first sheet material 100 and the second sheet material 200 themselves and combining the horizontal positions of the first connecting piece 1111 and the second connecting piece 1112, the width direction correction function can be achieved while supporting the two sheets, without the need to separately set up a step of correcting the deviation each time a layer of pole piece is stacked, thereby effectively improving the stacking efficiency.

[0063] It should be noted that the sizes of the first sheet 100 and the second sheet 200 can be consistent or inconsistent, as long as the lamination requirements are met. In some embodiments of the present application, in order to ensure that the lithium of the positive electrode sheet can be effectively embedded in the negative electrode sheet, thereby reducing the risk of lithium ion crystallization, it is necessary to design the size of the negative electrode sheet to be larger than the size of the positive electrode sheet. Therefore, during the lamination process, it is necessary to ensure that each edge of the negative electrode sheet is outside the corresponding edge of the positive electrode sheet, and in a preferred embodiment, the distance between each edge of the negative electrode sheet and the corresponding edge of the positive electrode sheet should be roughly equal. For ease of explanation, the difference between the width of the first sheet 100 and the width of the second sheet 200 is defined as a.

[0064] In some optional implementations, before step S1, the following steps S01-S02 are further included:

[0065] Step S01: The first sheet 100 is inserted into the transfer tray 122;

[0066] Step S02 , the first sheet materials 100 are transferred to the loading tray 121 , and the interval between any two adjacent first sheets 100 is c and c>0;

[0067] Step S03: The first sheet material 100 and the second sheet material 200 are sequentially inserted and spaced apart on the loading tray 121 along the X direction. The loading tray 121 supports the bottom ends of the first sheet material 100 and the second sheet material 200. The bottom ends of the first sheet material 100 and the second sheet material 200 are flush with each other in the Y direction.

[0068] In step S04 , the first sheet 100 and the second sheet 200 on the loading tray 121 are transferred to the forming device 11 ; the bottom ends of the first sheet 100 and the second sheet 200 disposed on the forming device 11 are spaced apart by a distance b in the Y direction, and a>b>0.

[0069] In some optional implementations, it is set that 2 / 3a>b>1 / 3a.

[0070] Furthermore, in some preferred embodiments, b=1 / 2a.

[0071] Therefore, by designing the parameter relationship between a and b, the first sheet 100 and the second sheet 200 can maintain a suitable positional relationship when the stack is compressed, thereby ensuring the embedding effect of lithium ions and reducing the risk of lithium ion crystallization, thereby improving the yield of the stack and the safety of the prepared battery.

[0072] In some optional embodiments, the second sheet material 200 and the first sheet material 100 are sequentially inserted on the loading tray 121 at intervals, and the interval distance between any adjacent first sheet material 100 and second sheet material 200 is d and 2 / 3c>d>1 / 3c.

[0073] Furthermore, in some preferred embodiments, d=1 / 2c.

[0074] In some optional implementations, step S2 specifically includes the following steps:

[0075] Step S21: the blanking device 13 clamps and fixes the pre-compressed pole core to further reduce the gap between the sheets within the first preset range;

[0076] In step S22 , the forming device 11 is relatively separated from the pre-compressed pole core to form a pre-formed pole core 300 .

[0077] When the sheet gap is reduced to within the first preset range, the relative position between the first sheet 100 and the second sheet 200 is relatively stable when the forming device 11 is separated from the pre-compressed pole core, that is, the first sheet 100 and the second sheet 200 do not move relative to each other in the direction of gravity, then the forming device 11 can be separated from the pre-compressed pole core.

[0078] In some optional embodiments, the blanking device 13 clamps one end of the pre-compressed pole core in the Z direction, and the forming device 11 supports the other end of the pre-compressed pole core in the Z direction; the Z direction is the length direction of the first sheet 100 and the second sheet 200.

[0079] It can be understood that when the unloading device 13 clamps one end of the fixed pre-compressed pole core in the length direction, and the unloading device 13 further compresses the pre-compressed pole core when clamping the pre-compressed pole core, due to the lever principle, the pre-compressed pole core will be in a slightly open state or tendency at the other end in the length direction, thereby reducing the resistance when the forming device 11 and the pre-compressed pole core are relatively separated.

[0080] The embodiment of the present application also provides a lamination device 1, which includes a forming device 11, and the forming device 11 includes a plurality of connecting plates 111 and a plurality of forming baffles 112. The connecting plates 111 connect adjacent forming baffles 112; the forming baffles 112 can move in a first direction to drive the connecting plates 111 to deform in a second direction. It should be noted that since the lamination device 1 itself can be set in any direction, the first direction, the second direction, and the third direction can be perpendicular to each other. It should be further noted that in the lamination device 1 provided in this embodiment, when the first direction is consistent with the aforementioned X direction, the second direction is consistent with the Y direction and the third direction is consistent with the Z direction.

[0081] In some optional embodiments, the lamination device 1 is used to laminate a first sheet material 100 and a second sheet material 200, and the difference between the width of the first sheet material 100 and the width of the second sheet material 200 is a. The connecting piece 111 includes a first connecting piece 1111 and a second connecting piece 1112 which are sequentially spaced between the forming partitions 112. The first connecting piece 1111 is used to support the first sheet material 100, and the second connecting piece 1112 is used to support the second sheet material 200; the spacing distance between the first connecting piece 1111 and the second connecting piece 1112 in the second direction is h and a>h>0.

[0082] In some optional embodiments, the lamination device 1 further includes a tray device 12 , and the tray device 12 includes a transfer tray 122 and a loading tray 121 .

[0083] In some specific embodiments, the loading tray 121 includes a loading base plate 12111 and a plurality of loading partitions 12112, one end of the loading partition 12112 is connected to one side of the loading base plate 12111 to form a comb-like structure; the loading partition 12112 includes a first loading partition 121121 and a second loading partition 121122 arranged in sequence, and a loading trough 12113 for accommodating the first sheet material 100 and / or the second sheet material 200 is formed between adjacent first loading partitions 121121 and second loading partitions 121122, and the bottom of the loading trough 12113 is located in the same plane in the second direction.

[0084] In some optional embodiments, the distance between any two adjacent forming partitions 112 is a forming distance C, and the size of the forming distance C is negatively correlated with the deformation amount generated by the connecting piece 111 in the second direction. When the forming distance C is reduced to a second preset range, the protruding vertex of the first connecting piece 1111 and the protruding vertex of the second connecting piece 1112 are separated by a distance B in the second direction, and a>B>0.

[0085] In some optional implementations, 2 / 3a>B>1 / 3a.

[0086] In some preferred embodiments, B=1 / 2a.

[0087] In some optional embodiments, when the forming partition 112 is in the extended state, the forming device 11 matches the width of the loading tray 121 in the first direction.

[0088] In some optional embodiments, when the forming partition 112 is in an extended state, the width of any loading groove 12113 is consistent with the forming distance C.

[0089] In some optional embodiments, the forming device 11 moves relative to the loading tray 121 in the second direction and passes through the loading tray 121 to transfer the first sheet material 100 and the second sheet material 200 on the loading tray 121 to the forming device 11 .

[0090] In some optional embodiments, the loading tray 121 includes an offset portion 1212 and a supporting portion 1211 . The supporting portion 1211 is used to support the first sheet material 100 and the second sheet material 200 . The offset portion 1212 is a gap for allowing the forming device 11 to pass through the loading tray 121 .

[0091] In some optional embodiments, the loading tray 121 includes at least two supporting portions 1211 , and the offset portion 1212 includes a gap disposed between adjacent supporting portions 1211 .

[0092] In some optional implementations, the number of the supporting portions 1211 is at least four, and the number of the offset portions 1212 is at least three.

[0093] In some optional implementations, the loading tray 121 further includes a connecting portion 1213 , and each supporting portion 1211 is connected to the connecting portion 1213 .

[0094] In some specific embodiments, the transfer tray 122 includes a transfer base plate 1221 and a plurality of transfer partitions 1222 , and one end of the transfer partition 1222 is connected to one side of the transfer base plate 1221 to form a comb-tooth structure.

[0095] Furthermore, the transfer partition 1222 includes a first transfer partition 12221 and a second transfer partition 12222 which are inserted in sequence at intervals, and a transfer trough 1223 for accommodating the first sheet material 100 or the second sheet material 200 is formed between adjacent first transfer partitions 12221 and second transfer partitions 12222. The first transfer partition 12221 and the second transfer partition 12222 can move relative to each other to change the width of the transfer trough 1223.

[0096] In some optional embodiments, the forming spacer 112 moves in a first direction to reduce the gap between the supported first and second sheets 100, 200. When the gap is reduced to within a first preset range, the first and second sheets 100, 200 form a pre-compressed pole core. The lamination apparatus 1 also includes a blanking device 13, which is used to clamp and secure the pre-compressed pole core to further reduce the gap within the first preset range. The forming device 11 is relatively separated from the pre-compressed pole core to form the pre-formed pole core 300.

[0097] In some optional embodiments, the blanking device 13 is disposed on one side of the forming device 11 in the third direction.

[0098] In order to further understand the technical solution of the embodiment of the present application, the forming device 11 in the lamination equipment 1 is described in detail below.

[0099] The forming device 11 provided in the embodiments of the present application includes a plurality of connecting pieces 111, a plurality of forming baffles 112, and a variable pitch structure 113. The connecting pieces 111 connect adjacent forming baffles 112, and sheets are inserted between adjacent forming baffles 112. The variable pitch structure 113 is used to move the forming baffles 112 in a first direction to reduce the spacing between adjacent sheets. The connecting pieces 111 are used to limit the sheets in a second direction, with the first and second directions being perpendicular to each other.

[0100] In the forming device 11 provided in the embodiment of the present application, the sheets are inserted between the forming baffles 112, and the spacing distance between the forming baffles 112 is reduced by the variable distance structure 113 to reduce the spacing between the sheets, thereby achieving compression of the sheets. Compared with the prior art of laying sheets layer by layer, the method of inserting the sheets in the present application can compress and stack multiple sheets at the same time, effectively improving the efficiency of stacking.

[0101] In addition, since the sheet material is inserted into the forming device 11, and the connecting piece 111 can limit the position of the sheet material in the second direction when the forming partition 112 moves in the first direction, the forming device 11 uses the gravity of the sheet material itself combined with the limiting effect of the connecting piece 111 to act as a position reference when accommodating the sheet material inserted therein, that is, the forming device 11 plays a role of correcting the sheet material in at least one direction, thus omitting the correcting action in at least one direction, thereby effectively saving the stacking time and further improving the stacking efficiency.

[0102] In some optional embodiments, the forming device 11 is suitable for stacking a first sheet material 100 and a second sheet material 200, the difference between the width of the first sheet material 100 and the width of the second sheet material 200 is a, the connecting piece 111 includes a first connecting piece 1111 and a second connecting piece 1112 which are sequentially spaced between the forming partitions 112, the first connecting piece 1111 is used to support the first sheet material 100, and the second connecting piece 1112 is used to support the second sheet material 200; when the variable distance structure 113 is in the expanded state, multiple first connecting pieces 1111 are in the same plane in the second direction and multiple second connecting pieces 1112 are in the same plane in the second direction, the spacing distance between the first connecting piece 1111 and the second connecting piece 1112 in the second direction is h and a>h>0.

[0103] In the forming device 11 provided in the embodiment of the present application, by designing the spacing distance between the first connecting piece 1111 and the second connecting piece 1112 in the second direction, the supported first sheet material 100 and the second sheet material 200 can be staggered accordingly in the second direction according to the stacking requirements. That is, when the first connecting piece 1111 and the second connecting piece 1112 support and insert the two sheets in the forming device 11, the two sheets are corrected in the second direction at the same time so that they can meet the subsequent pressing requirements, thereby improving the stacking efficiency.

[0104] In some optional implementations, 2 / 3a>h>1 / 3a.

[0105] In some preferred embodiments, h=1 / 2a.

[0106] In the forming device 11 provided in the embodiment of the present application, by designing the relationship between the spacing distance h between the first connecting piece 1111 and the second connecting piece 1112 in the second direction and the difference a between the width of the first sheet 100 and the width of the second sheet 200, the edge misalignment size between the two sheets inserted in the forming device 11 can meet the subsequent stacking requirements of directly pressing the sheets.

[0107] In some optional embodiments, the connecting piece 111 is made of a flexible material, and the connecting piece 111 deforms downward in the direction of gravity when supporting the first sheet 100 and the second sheet 200; and as the forming partition 112 moves in the first direction, the deformation amount of the connecting piece 111 in the direction of gravity changes.

[0108] In the forming device 11 provided in some embodiments of the present application, the connecting piece 111 is made of a flexible material, which can play a buffering role, and the deformation of the connecting piece 111 in the direction of gravity changes with the movement of the forming partition 112, so that the connecting piece 111 arranged between the forming partitions 112 does not affect the forming device 11 to press the sheet material.

[0109] In some other optional embodiments, the material of the connecting piece 111 may be a rigid material, and when the forming partition 112 moves in the first direction, the first connecting piece 1111 and the second connecting piece 1112 are both in the original plane in the second direction.

[0110] In the forming device 11 provided in other embodiments of the present application, the material of the connecting piece 111 is a flexible material, and when the forming partition 112 moves in the first direction, the first connecting piece 1111 and the second connecting piece 1112 do not change in the second direction, so that the position of the supported sheet material in the second direction can always be kept relatively constant, thereby playing a role in correcting the edge of the sheet material in the second direction.

[0111] In some optional embodiments, the variable pitch structure 113 includes a first side plate 1131 and a second side plate 1132. The plurality of connecting pieces 111 and the plurality of formed baffles 112 are disposed between the first side plate 1131 and the second side plate 1132. The first side plate 1131 and the second side plate 1132 move relative to each other in a first direction to drive the formed baffles 112 to move relative to each other in the first direction. The first side plate 1131 and the second side plate 1132 are harder than the formed baffles 112 to facilitate application of a pushing or pulling force to the formed baffles 112.

[0112] In some optional embodiments, the distance between any two adjacent forming partitions 112 is the forming distance C, and the first side plate 1131 moves toward the second side plate 1132 to reduce the forming distance C, or the first side plate 1131 moves away from the second side plate 1132 to increase the forming distance C.

[0113] In some optional embodiments, the variable distance structure 113 further includes a guide member, which limits the movement of the forming partition 112 along the first direction.

[0114] In the forming device 11 provided in the embodiment of the present application, a guide member is provided to ensure that the forming partition 112 moves only along the first direction, that is, the sheet material inserted in the forming device 11 is limited to move only along the first direction, thereby realizing the pressing function of the forming device 11 on the sheet material.

[0115] In some optional embodiments, the guide member includes a guide rod 1133 arranged along the first direction, and the guide rod 1133 is connected to each forming baffle 112 to limit the forming baffle 112 to move along the guide rod 1133 in the first direction.

[0116] In some optional implementations, at least two layers of guide rods 1133 are provided in the second direction.

[0117] In some optional implementations, at least two groups of guide rods 1133 are provided in the third direction, and the third direction is perpendicular to both the first direction and the second direction.

[0118] In some specific embodiments, at least three groups of guide rods 1133 are provided in the third direction, the two groups of guide rods 1133 at both ends are symmetrically arranged, and the number of guide rods 1133 in the middle group is greater than the number of any group of guide rods 1133 at both ends.

[0119] In order to further understand the technical solution of the embodiment of the present application, the tray device 12 in the lamination equipment 1 is described in detail below.

[0120] The tray assembly 12 includes a loading tray 121, which includes a loading base 12111 and a plurality of loading partitions 12112. One end of each loading partition 12112 is connected to a surface of the loading base 12111 to form a comb-like structure. The loading partitions 12112 include a first loading partition 121121 and a second loading partition 121122 spaced apart in a first direction. A loading trough 12113 is formed between adjacent first loading partitions 121121 and second loading partitions 121122.

[0121] In the material tray device 12 provided in the embodiment of the present application, by connecting one end of the material loading partition 12112 to a side of the material loading base 12111 to form a comb-like structure, a material loading trough 12113 is formed between the first material loading partition 121121 and the second material loading partition 121122, which are arranged in sequence. The sheet materials required for the lamination process can be directly inserted into the material loading trough 12113, so that multiple sheets inserted into the material loading trough 12113 can be transported simultaneously by the material loading tray 121, thereby effectively improving the transportation efficiency of the sheets and thus improving the efficiency of lamination. In addition, the method of directly inserting the sheets into the material loading trough 12113 for transportation has initially stacked the sheets layer by layer, making it more convenient for the subsequent lamination and pressing step, thereby also saving the overall lamination time.

[0122] In some optional embodiments, the width of the loading trough 12113 is adjustable, allowing the loading tray 121 to clamp the sheet material inserted therein. For example, the loading base 12111 may include a first loading base and a second loading base, with one end of the first loading partition 121121 fixedly connected to a surface of the first loading base, and one end of the second loading partition 121122 fixedly connected to a surface of the second loading base. The first loading base and the second loading base are movable relative to each other in a first direction, thereby driving the first loading partition 121121 and the second loading partition to move relative to each other in the first direction, thereby adjusting the width of the loading trough 12113 to clamp or release the sheet material.

[0123] In some optional embodiments, the loading tray 121 includes a plurality of loading troughs 12113 , and the bottoms of the plurality of loading troughs 12113 are located in the same plane in a second direction, and the second direction is perpendicular to the first direction.

[0124] In some optional embodiments, the widths of any two adjacent loading slots 12113 are the same.

[0125] In some optional embodiments, the loading tray 121 includes a dislocation portion 1212 and a supporting portion 1211 , the supporting portion 1211 is used to support the material, and the dislocation portion 1212 includes a notch for transferring the material.

[0126] In some optional embodiments, the loading tray 121 includes at least two supporting portions 1211 , and the offset portion 1212 includes a gap disposed between adjacent supporting portions 1211 .

[0127] In some optional implementations, the number of the supporting portions 1211 is at least four, and the number of the offset portions 1212 is at least three.

[0128] In some optional embodiments, the supporting portion 1211 includes a first supporting portion 1211, a second supporting portion 1211, a third supporting portion 1211 and a fourth supporting portion 1211 arranged in sequence in the third direction, the gap between the first supporting portion 1211 and the second supporting portion 1211 is the first offset portion 1212, the gap between the second supporting portion 1211 and the third supporting portion 1211 is the second offset portion 1212, and the gap between the third supporting portion 1211 and the fourth supporting portion 1211 is the third offset portion 1212; the width of the second offset portion 1212 is greater than the width of the first offset portion 1212, and the width of the first offset portion 1212 is consistent with the width of the third offset portion 1212.

[0129] In some optional embodiments, the tray assembly 12 further includes a transfer tray 122, which includes a transfer base plate 1221 and a plurality of transfer partitions 1222. One end of each transfer partition 1222 is connected to a surface of the transfer base plate 1221 to form a comb-like structure. The transfer partitions 1222 include a first transfer partition 12221 and a second transfer partition 12222, which are sequentially spaced apart. A transfer trough 1223 for accommodating material is formed between adjacent first and second transfer partitions 12221, 12222. The first and second transfer partitions 12221, 12222 are movable relative to each other to adjust the width of the transfer trough 1223.

[0130] In some optional embodiments, the transfer bottom plate 1221 includes a first transfer bottom plate and a second transfer bottom plate, the first transfer bottom plate is fixedly connected to the first transfer partition 12221, and the second transfer bottom plate is fixedly connected to the second transfer partition 12222. The first transfer bottom plate and the second transfer bottom plate can move relative to each other in the first direction, driving the first transfer partition 12221 and the second transfer partition 12222 to move relative to each other in the first direction to change the width of the transfer trough 1223.

[0131] In some optional embodiments, the transfer trough 1223 includes a first transfer trough 12231 for accommodating the first sheet material 100 and a second transfer trough 12232 for accommodating the second sheet material 200, and the first transfer trough 12231 and the second transfer trough 12232 are arranged in sequence; the transfer material tray 122 is used to transfer the first sheet material 100 or the second sheet material 200.

[0132] In some optional embodiments, the loading trough 12113 includes a first loading trough 121131 for supporting the first sheet material 100 and a second loading trough 121132 for supporting the second sheet material 200, and the first loading trough 121131 and the second loading trough 121132 are arranged in sequence; the distance between any adjacent first transfer troughs 12231 is consistent with the distance between any adjacent first loading troughs 121131, and the distance between any adjacent second transfer troughs 12232 is consistent with the distance between any adjacent second loading troughs 121132. It should be noted that the distance between adjacent first transfer troughs 12231 is the distance between the center lines of adjacent first transfer troughs 12231, and the distance between adjacent first loading troughs 121131 is the distance between the center lines of adjacent first loading troughs 121131.

[0133] In some optional embodiments, the number of loading troughs 12113 is greater than or equal to the number of transfer troughs 1223.

[0134] In some optional embodiments, the transfer tray 122 can be flipped in the direction of gravity so that the notch of the transfer trough 1223 is upward or downward; when the notch of the transfer trough 1223 is upward, the transfer tray 122 is used to support and clamp the first sheet material 100 or the second sheet material 200; when the notch of the transfer trough 1223 is downward and corresponds to the notch of the loading trough 12113, the transfer tray 122 is used to release the first sheet material 100 or the second sheet material 200 so that the first sheet material 100 or the second sheet material 200 is transferred to the corresponding first loading trough 121131 or the second loading trough 121132.

[0135] In some preferred embodiments, the loading tray 121 and the transfer tray 122 have the same structure and function. When the first sheet material 100 is inserted into the transfer tray 122, a matching number of second sheets 200 can be inserted into the loading tray 121 at the same time, and then the first sheet material 100 in the transfer tray 122 is transferred to the loading tray 121, thereby realizing that the first sheet material 100 and the second sheet material 200 are inserted into the loading tray 121 in sequence.

[0136] In summary, in the stacking device 1 provided in the embodiment of the present application, after the first sheet material 100 is inserted into the transfer tray 122, the width of the transfer trough 1223 is changed so that the transfer tray 122 clamps the first sheet material 100; then the transfer tray 122 is flipped so that the notch of the transfer trough 1223 is downward, and the transfer tray 122 and the loading tray 121 are vertically opposite each other, so that the first transfer trough 12231 clamping the first sheet material 100 corresponds to the first loading trough 121131 of the loading tray 121; then the width of the transfer trough 1223 is increased, and the transfer tray 122 releases the first sheet material 100, so that the first sheet material 100 is transferred to the loading tray 121. Before the first sheet material 100 is transferred to the loading tray 121, the step of inserting the second sheet material 200 in the loading tray 121 has been completed, so at this time, the first sheet material 100 and the second sheet material 200 are both inserted in the loading tray 121 in sequence and at intervals. After the first sheet 100 is transferred to the loading tray 121 , the transfer tray 122 can begin to prepare to receive subsequent sheets.

[0137] Since the offset portion 1212 is provided between the supporting portion 1211 of the loading tray 121, the forming device 11 in the expanded state is first opposite to the offset portion 1212 below the loading tray 121, so that the first connecting piece 1111 corresponds to the first loading groove 121131 and the second connecting piece 1112 corresponds to the second loading groove 121132. Then, the forming device 11 moves upward from the bottom relative to the loading tray 121 until the forming device 11 passes through the loading tray 121 via the offset portion 1212, so that the first sheet material 100 and the second sheet material 200 are transferred to the forming device 11. At this time, due to the offset design of the first connecting piece 1111 and the second connecting piece 1112 in the direction of gravity, the position correction of the two sheets in the direction of gravity is achieved while the two sheets are transferred to the forming device 11, thereby greatly improving the overall stacking efficiency. After the two sheets are transferred to the forming device 11 , the loading tray 121 can begin to prepare to receive subsequent sheets.

[0138] After determining that the two sheets in the forming device 11 meet the lamination requirements, the forming partition 112 moves relative to each other to reduce the gap between the sheets, thereby preliminarily compressing the two sheets to form a pre-compressed pole core. The unloading device 13 then clamps the end of the pre-compressed pole core that extends out of the forming device 11 in the length direction. While clamping the pre-compressed pole core, the unloading device 13 further compresses the pre-compressed pole core in the first direction. The forming device 11 then separates from the pre-compressed pole core to form a pre-formed pole core 300. After completely separating from the pre-compressed pole core, the forming device 11 is again transformed into an expanded state, thereby preparing to receive subsequent sheets.

[0139] An embodiment of the present application further provides a battery production line, which stacks cells using the stacking method provided in the above embodiment, and / or the battery production line includes the stacking device 1 provided in the second aspect.

[0140] Since the battery production line provided in the embodiment of the present application has the same effect as the lamination device 1 provided in the above embodiment, it will not be described in detail.

[0141] In the description of this specification, the reference terms "embodiment", "specific embodiment", "example" or "specific example" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0142] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A forming device, characterized in that: The forming device includes a plurality of connecting pieces, a plurality of forming partitions and a variable pitch structure; The connecting piece connects the adjacent forming partitions, and the adjacent forming partitions are used to insert sheet materials; The variable distance structure is used to move the forming partition in a first direction to reduce the spacing distance between adjacent sheets, and the connecting piece is used to limit the sheet in a second direction; the first direction and the second direction are perpendicular to each other.

2. The forming device according to claim 1, wherein the forming device is suitable for laminating a first sheet material and a second sheet material, wherein the difference between the width of the first sheet material and the width of the second sheet material is a, and wherein: The connecting piece includes a first connecting piece and a second connecting piece sequentially arranged between the forming partitions, the first connecting piece is used to support the first sheet material, and the second connecting piece is used to support the second sheet material; When the variable distance structure is in the expanded state, multiple first connecting pieces are in the same plane in the second direction and multiple second connecting pieces are in the same plane in the second direction, and the spacing distance between the first connecting pieces and the second connecting pieces in the second direction is h and a>h>0.

3. The forming device according to claim 1, characterized in that 2 / 3a>h>1 / 3a.

4. The forming device according to claim 1, characterized in that h=1 / 2a.

5. The forming device according to claim 1, characterized in that The connecting piece is made of a flexible material and deforms downward in the direction of gravity when supporting the first sheet and the second sheet. As the forming partition moves in the first direction, the deformation amount of the connecting piece in the direction of gravity changes.

6. The forming device according to claim 2, characterized in that The connecting piece is made of a rigid material. When the shaped partition moves in the first direction, the first connecting piece and the second connecting piece are both in the original plane in the second direction.

7. The forming device according to claim 1, characterized in that The variable pitch structure includes a first side plate and a second side plate, and the plurality of connecting plates and the plurality of forming partitions are arranged between the first side plate and the second side plate. The first side plate and the second side plate move relative to each other in the first direction to drive the forming partitions to move relative to each other in the first direction.

8. The forming device according to claim 7, characterized in that The distance between any two adjacent forming partitions is a forming distance C. The first side plate moves toward the second side plate to reduce the forming distance C, or the first side plate moves away from the second side plate to increase the forming distance C.

9. The forming device according to claim 7, characterized in that The variable distance structure further includes a guide member, which limits the movement of the shaped partition along a first direction.

10. The forming device according to claim 9, characterized in that The guide member includes a guide rod arranged along a first direction, and the guide rod is connected to each of the forming baffles to limit the forming baffles to move along the guide rod in the first direction.

11. The forming device according to claim 10, characterized in that At least two layers of the guide rods are arranged in the second direction.

12. The forming device according to claim 10, characterized in that At least two groups of guide rods are arranged in a third direction, and the third direction is perpendicular to both the first direction and the second direction.

13. The forming device according to claim 12, characterized in that At least three groups of guide rods are arranged in the third direction, the two groups of guide rods at both ends are symmetrically arranged, and the number of guide rods in the middle group is greater than the number of guide rods in any group of guide rods at both ends.

14. A lamination device, characterized in that: The lamination equipment includes the forming device according to any one of claims 1-13.

15. A battery production line, characterized in that: The battery production line includes the forming device according to any one of claims 1 to 13, and / or the battery production line includes the stacking equipment according to claim 14.

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