A stacking system and a battery cell stacking method

Abstract

The embodiments of the present invention provide a stacking system and a battery cell stacking method, which relate to the field of battery technology. The stacking system includes a conveying assembly, a blowing member, a cutting member and a lifting assembly, which are arranged in sequence; the conveying assembly is used to transport the composite sheet and convey the composite sheet to the blowing member; the blowing member is used to blow the electrode sheet against the lifting assembly, so that multiple electrode sheets are stacked on the lifting assembly to form a battery cell; the cutting member is used to cut off the battery cell and the connecting diaphragm when the electrode sheet forms a battery cell on the lifting assembly. In the embodiment of the present invention, stacking the battery cells by blowing can avoid the direct contact between the blowing member and the composite sheet during the stacking process, which affects the effect of battery cell stacking. At the same time, stacking the battery cells by blowing improves the efficiency and stability of battery cell stacking.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a stacking system and a battery cell stacking method. Background Art

[0002] The lamination process of the traditional lamination machine is to use a robot to stack the single-piece composite sheets one by one, which is inefficient. The closest implementation scheme to the present invention is a swing lamination method. The swing action process: the incoming pole piece enters the swing roller assembly, and the swing roller drives the pole piece assembly to swing to the left and right at a certain angle. After reaching the set position, the flattening assembly flattens the pole piece, and this cycle continues. When the predetermined number of pole pieces are stacked, the cutter cuts off the pole piece and cuts off the material.

[0003] The disadvantage of the prior art is that the oscillating roller assembly itself has a relatively large mass and a high oscillation frequency, which causes vibrations that affect the stacking effect. Summary of the invention

[0004] The purpose of the present invention is to provide a stacking system and a cell stacking method. The blowing method can avoid direct contact between the blowing component and the composite sheet during the stacking process, which affects the cell stacking effect. At the same time, the blowing method can improve the efficiency and stability of the cell stacking.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, an embodiment of the present invention provides a lamination system for stacking composite sheets to form a battery core, wherein the composite sheet includes a connecting diaphragm and a plurality of pole sheets, and the plurality of pole sheets are arranged on the connecting diaphragm at intervals, and the lamination system includes: a conveying component, a blowing component, a cutting component, and a lifting component, wherein the conveying component, the cutting component, the blowing component, and the lifting component are arranged in sequence;

[0007] The conveying assembly is used to convey the composite sheet and convey the composite sheet to the blowing member;

[0008] The blowing member is used to blow the pole piece against the lifting assembly, so that a plurality of pole pieces are stacked on the lifting assembly to form the battery core;

[0009] The cutting piece is used to cut off the battery core and the connecting diaphragm when the pole piece forms the battery core on the lifting assembly.

[0010] In an optional embodiment of the present invention, the lifting assembly includes a driving member, a transmission member and a mounting member, and the driving member is transmission-connected to the mounting member through the transmission member;

[0011] The driving member is used for driving the mounting member to move in a direction away from the blowing member through the transmission member when one of the pole pieces is stacked on the mounting member.

[0012] In an optional embodiment of the present invention, the transmission member includes a first sliding part and a second sliding part, the first sliding part is fixed on the external structure, the second sliding part connects the driving member and the mounting member, and the first sliding part and the second sliding part are slidably matched.

[0013] In an optional embodiment of the present invention, the mounting member includes a receiving portion and a stop portion which are arranged at an angle to each other, the stop portion is arranged at one end of the receiving portion away from the blowing member, and the receiving portion is used to receive the pole piece.

[0014] In an optional embodiment of the present invention, the transmission component includes a first transmission part and a second transmission part, the first transmission part and the second transmission part are arranged at an interval, and the composite sheet is arranged between the first transmission part and the second transmission part.

[0015] In an optional embodiment of the present invention, the first transmission part is a belt transmission structure or a steel belt transmission structure; the second transmission part is a belt transmission structure or a steel belt transmission structure.

[0016] In an optional embodiment of the present invention, the blowing member is a universal wind knife, and the wind nozzle of the universal wind knife is arranged toward the composite sheet.

[0017] In a second aspect, an embodiment of the present invention provides a battery cell stacking method for stacking composite sheets to form a battery cell, wherein the composite sheet includes a connecting diaphragm and a plurality of pole sheets, and the plurality of pole sheets are arranged on the connecting diaphragm at intervals. The battery cell stacking method includes:

[0018] Blowing the pole pieces so that a plurality of the pole pieces are stacked to form the battery core;

[0019] When the pole piece forms the battery core, the battery core and the connecting diaphragm are cut off.

[0020] In an optional embodiment of the present invention, the step of blowing the pole piece to stack a plurality of the pole pieces to form the battery core includes:

[0021] Blowing is performed near the connection between two adjacent pole pieces so that a plurality of pole pieces are stacked to form the battery core.

[0022] In an optional embodiment of the present invention, the battery cell stacking method further includes:

[0023] When one of the pole pieces is stacked onto the battery core, the battery core is controlled to move downward.

[0024] The beneficial effects of the embodiments of the present invention are as follows: the stacking system includes a conveying assembly, a blowing member, a cutting member and a lifting assembly, which are arranged in sequence; the conveying assembly is used to transport the composite sheet and convey the composite sheet to the blowing member; the blowing member is used to blow the electrode sheet against the lifting assembly, so that multiple electrode sheets are stacked on the lifting assembly to form a battery cell; the cutting member is used to cut off the battery cell and the connecting diaphragm when the electrode sheet forms a battery cell on the lifting assembly.

[0025] In an embodiment of the present invention, the conveying component sequentially conveys the composite sheets and transfers the composite sheets to the blowing member. The blowing member stacks the electrode sheets on the lifting component by blowing, so that multiple electrode sheets are stacked on the lifting component to form a battery cell. When multiple electrode sheets form a battery cell, the cutting member cuts off the battery cell and the connecting diaphragm, and removes the battery cell from the lifting component. In an embodiment of the present invention, stacking the battery cells by blowing can avoid direct contact between the blowing member and the composite sheets during the stacking process, which affects the effect of battery cell stacking. At the same time, stacking the battery cells by blowing improves the efficiency and stability of battery cell stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the structure of stacked cells in a lamination system provided in the first embodiment of the present invention;

[0028] Figure 2 This is a flow chart of a battery cell stacking method provided for the second embodiment of the present invention.

[0029] Icons: 100- stacking system; 110- lifting assembly; 112- mounting part; 114- receiving part; 116- stopping part; 120- conveying assembly; 122- first transmission part; 124- second transmission part; 130- blowing part; 140- cutting part; 200- composite sheet; 210- connecting diaphragm; 220- pole piece. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0034] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0035] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0036] First embodiment

[0037] See also Figure 1 The present embodiment provides a lamination system 100, which is mainly used to stack composite sheets 200 to form a battery cell. The lamination system 100 provided in the present embodiment uses a blowing method to stack the battery cells, which can avoid the blowing component directly contacting the composite sheet 200 during the stacking process, thereby affecting the battery cell stacking effect. At the same time, the blowing method to stack the battery cells improves the efficiency and stability of the battery cell stacking.

[0038] The composite sheet 200 includes a connecting diaphragm 210 and a plurality of pole pieces 220, and the plurality of pole pieces 220 are spaced apart on the connecting diaphragm 210. The pole pieces 220 include a positive pole piece and a negative pole piece, and the positive pole piece and the negative pole piece are respectively attached to both sides of the connecting diaphragm 210. The connecting diaphragm 210 includes a first diaphragm and a second diaphragm, and the positive pole piece, the first diaphragm, the negative pole piece and the second diaphragm are attached in sequence.

[0039] In this embodiment, the stacking system 100 includes: a conveying component 120, a blowing component 130, a cutting component 140 and a lifting component 110, and the conveying component 120, the cutting component 140, the blowing component 130 and the lifting component 110 are arranged in sequence; the conveying component 120 is used to transport the composite sheet 200 and convey the composite sheet 200 to the blowing component 130; the blowing component 130 is used to blow the electrode sheet 220 against the lifting component 110, so that multiple electrode sheets 220 are stacked on the lifting component 110 to form a battery cell; the cutting component 140 is used to cut off the battery cell and the connecting diaphragm 210 when the electrode sheet 220 forms a battery cell on the lifting component 110.

[0040] In this embodiment, the conveying component 120 conveys the composite sheet 200 in sequence and transfers the composite sheet 200 to the blowing component 130. The blowing component 130 stacks the electrode sheets 220 on the lifting component 110 by blowing, so that multiple electrode sheets 220 are stacked on the lifting component 110 to form a battery cell. When multiple electrode sheets 220 form a battery cell, the cutting component 140 cuts off the battery cell and the connecting diaphragm 210, and removes the battery cell from the lifting component 110.

[0041] In this embodiment, stacking the cells by blowing against each other can avoid direct contact between the blowing against components and the composite sheet 200 during the stacking process, thereby affecting the stacking effect of the cells. At the same time, stacking the cells by blowing against each other improves the stacking efficiency and stability of the cells.

[0042] In this embodiment, the blowing member 130 acts on the connection between two adjacent pole pieces 220 , that is, the blowing member 130 blows the connecting diaphragm 210 between the two adjacent pole pieces 220 to fold the connecting diaphragm 210 , thereby stacking one of the two adjacent pole pieces 220 on top of the other.

[0043] In this embodiment, the lifting assembly 110 includes a driving member, a transmission member and a mounting member 112, and the driving member is connected to the mounting member 112 through the transmission member; the driving member is used to drive the mounting member 112 to move away from the blowing member 130 through the transmission member when a pole piece 220 is stacked on the mounting member 112.

[0044] In this embodiment, the pole piece 220 is attached to the connecting diaphragm 210, and the pole piece 220 and the connecting diaphragm 210 have a certain thickness. When the pole piece 220 is stacked on the lifting component 110, the height on the lifting component 110 will become higher and higher. The lifting component 110 drives the multiple pole pieces 220 stacked thereon to move away from the blowing member 130, so that the blowing member 130 can always act on the connecting diaphragm 210 at the connection between two adjacent pole pieces 220.

[0045] That is to say, when a pole piece 220 is stacked on the mounting member 112, the driving member drives the mounting member 112 through the transmission member to move a pole piece 220 and the thickness of the connecting diaphragm 210 in a direction away from the blowing member 130, so that the next pole piece 220 moves to the bottom of the blowing member 130, and the blowing member 130 can act on the connecting diaphragm 210 where it is connected to the adjacent pole piece 220. Under the action of the blowing member 130, the pole piece 220 is folded relative to the adjacent pole piece 220 and thus stacked on the mounting member 112.

[0046] It is easy to understand that each time a pole piece 220 is blown against the mounting member 112 , the driving member drives the mounting member 112 to move away from the blowing member 130 by a distance equal to the thickness of the pole piece 220 and the connecting diaphragm 210 .

[0047] In this embodiment, the transmission member includes a first sliding part and a second sliding part. The first sliding part is fixed on the external structure, and the second sliding part is connected to the driving member and the mounting member 112. The first sliding part and the second sliding part are slidably matched.

[0048] It should be noted that the first sliding part can be a slide groove or a slide rail, and the second sliding part can be a slide groove or a slide rail. When the first sliding part is a slide groove, the second sliding part is a slide rail, and when the first sliding part is a slide rail, the second sliding part is a slide groove.

[0049] In this embodiment, the first sliding part may be fixed on a bracket on which the lamination system 100 is installed, or may be fixed on a wall in an environment in which the lamination system 100 is installed. The first sliding part may be fixedly installed.

[0050] When one of the pole pieces 220 is stacked on the mounting member 112 , the driving member drives the mounting member 112 to move away from the blowing member 130 , and the second sliding part slides downward relative to the first sliding part to drive the mounting member 112 to move away from the blowing member 130 .

[0051] In this embodiment, the mounting member 112 includes a receiving portion 114 and a stopper 116 which are arranged at an angle to each other. The stopper 116 is arranged at one end of the receiving portion 114 away from the blow-through member 130 . The receiving portion 114 is used to receive the pole piece 220 .

[0052] In this embodiment, when the pole piece 220 is placed on the receiving portion 114, the stop portion 116 can limit the pole piece 220, thereby preventing the pole piece 220 from sliding out of the receiving portion 114 from one end of the receiving portion 114 away from the blowing member 130, thereby improving the stacking effect of the battery cells.

[0053] In this embodiment, the receiving portion 114 and the stopper portion 116 are perpendicular to each other. The two are perpendicular to each other so that the pole pieces 220 stacked on the receiving portion 114 can be arranged along the extension direction of the stopper portion 116, which can improve the neatness of the stacked battery cells.

[0054] It should be noted that, in the present embodiment, the receiving portion 114 and the stopping portion 116 are perpendicular to each other, but are not limited to this. In other embodiments of the present invention, the receiving portion 114 may be at other angles with the stopping portion 116. Solutions that are equivalent to the present embodiment and can achieve the effects of the present embodiment are all within the protection scope of the present invention.

[0055] In this embodiment, the transmission assembly 120 includes a first transmission part 122 and a second transmission part 124 . The first transmission part 122 and the second transmission part 124 are arranged at an interval, and the composite sheet 200 is arranged between the first transmission part 122 and the second transmission part 124 .

[0056] In this embodiment, the first transmission part 122 and the second transmission part 124 are arranged opposite to each other. During the transmission of the composite sheet 200 , the pole piece 220 and the connecting diaphragm 210 can be heated and clamped, so that the composite sheet 200 can be initially rolled and formed.

[0057] In this embodiment, the first transmission part 122 is a belt transmission structure. When the composite sheet 200 is transmitted, the pole piece 220 and the connecting diaphragm 210 can be heated and clamped, so that the composite sheet 200 can be initially rolled and formed.

[0058] It should be noted that, in this embodiment, the first transmission part 122 is a belt transmission structure, but is not limited to this. In other embodiments of the present invention, the first transmission part 122 may also be a steel belt transmission structure. Solutions equivalent to this embodiment and capable of achieving the effects of this embodiment are all within the protection scope of the present invention.

[0059] In this embodiment, the second transmission part 124 is a belt transmission structure. When the composite sheet 200 is transmitted, the pole piece 220 and the connecting diaphragm 210 can be heated and clamped, so that the composite sheet 200 can be initially rolled and formed.

[0060] It should be noted that, in this embodiment, the second transmission part 124 is a belt transmission structure, but is not limited to this. In other embodiments of the present invention, the second transmission part 124 may also be a steel belt transmission structure. Solutions equivalent to this embodiment and capable of achieving the effects of this embodiment are all within the protection scope of the present invention.

[0061] In this embodiment, the blowing member 130 is a universal wind knife, and the wind nozzle of the universal wind knife is arranged toward the composite sheet 200. The direction of the wind nozzle of the blowing member 130 can be adjusted according to the position of the composite sheet 200, which is convenient to operate and simple to control.

[0062] The working principle of the stacking system 100 provided in this embodiment is as follows: in this embodiment, the conveying component 120 conveys the composite sheet 200 in sequence, and transfers the composite sheet 200 to the blowing component 130. The blowing component 130 stacks the electrode sheets 220 on the lifting component 110 by blowing, so that a plurality of electrode sheets 220 are stacked on the lifting component 110 to form a battery cell. When a plurality of electrode sheets 220 form a battery cell, the cutting component 140 cuts off the battery cell and the connecting diaphragm 210, and removes the battery cell from the lifting component 110.

[0063] In summary, the stacking system 100 provided in this embodiment uses a blowing method to stack the cells, which can prevent the blowing component from directly contacting the composite sheet 200 during the stacking process, thereby affecting the stacking effect of the cells. At the same time, using the blowing method to stack the cells improves the efficiency and stability of the cell stacking.

[0064] Second embodiment

[0065] See also Figure 2 This embodiment provides a battery cell stacking method. The battery cell stacking method provided in this embodiment is completed based on the stacking system provided in the first embodiment. For the sake of brief description, the matters not mentioned in this embodiment may refer to the first embodiment.

[0066] The specific steps of the battery cell stacking method provided in this embodiment are as follows:

[0067] Step S100, blowing against the pole pieces 220, so that a plurality of pole pieces 220 are stacked to form a battery cell.

[0068] In this embodiment, the conveying assembly 120 transports the composite sheet 200 to the blowing member 130 , and the blowing member 130 blows the electrode sheet 220 against the receiving portion 114 , so that a plurality of electrode sheets 220 are stacked to form a battery core.

[0069] In this embodiment, the air is blown toward the connection between two adjacent pole pieces 220 so that a plurality of pole pieces 220 are stacked to form a battery cell.

[0070] Step S200 , when the electrode piece 220 forms a battery cell, the battery cell and the connecting diaphragm 210 are cut off.

[0071] In this embodiment, when the electrode pieces 220 form a battery cell, the cutting member 140 cuts off the battery cell and connects the separator 210 .

[0072] Step S300, when one of the pole pieces 220 is stacked on the battery cell, the battery cell is controlled to move downward.

[0073] In this embodiment, when one of the pole pieces 220 is stacked onto the battery cell, the driving component controls the battery cell to move downward.

[0074] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A lamination system for stacking composite sheets to form a battery core, wherein the composite sheet comprises a connecting diaphragm and a plurality of pole sheets, wherein the plurality of pole sheets are arranged on the connecting diaphragm at intervals, and wherein: The lamination system comprises: a conveying component, a blowing component, a cutting component and a lifting component, wherein the conveying component, the cutting component, the blowing component and the lifting component are arranged in sequence; The conveying assembly is used to convey the composite sheet and convey the composite sheet to the blowing member, the conveying assembly comprises a first conveying part and a second conveying part, the first conveying part and the second conveying part are arranged at intervals, and the composite sheet is arranged between the first conveying part and the second conveying part; The blowing member is used to blow the pole piece against the lifting assembly, so that a plurality of pole pieces are stacked on the lifting assembly to form the battery core; The cutting member is used to cut off the battery cell and the connecting diaphragm when the pole piece forms the battery cell on the lifting assembly; The lifting assembly includes a driving member, a transmission member and a mounting member. The driving member is connected to the mounting member through the transmission member. The driving member is used to drive the mounting member to move away from the blowing member through the transmission member when one of the pole pieces is stacked on the mounting member.

2. The lamination system according to claim 1, characterized in that: The transmission member includes a first sliding part and a second sliding part, the first sliding part is fixed on the external structure, the second sliding part is connected to the driving member and the mounting member, and the first sliding part and the second sliding part are slidably matched.

3. The lamination system according to claim 1, characterized in that: The mounting member comprises a receiving portion and a stopper portion which are arranged at an angle to each other, wherein the stopper portion is arranged at one end of the receiving portion away from the blowing member, and the receiving portion is used for receiving the pole piece.

4. The lamination system according to claim 1, characterized in that: The first transmission part is a belt transmission structure or a steel belt transmission structure; the second transmission part is a belt transmission structure or a steel belt transmission structure.

5. The lamination system according to claim 1, characterized in that: The blowing member is a universal wind knife, and the wind nozzle of the universal wind knife is arranged toward the composite sheet.

6. A battery cell stacking method, applied to the stacking system according to any one of claims 1 to 5, characterized in that: The composite sheets are stacked to form a battery cell, wherein the composite sheet includes a connecting diaphragm and a plurality of pole sheets, and the plurality of pole sheets are arranged on the connecting diaphragm at intervals. The battery cell stacking method includes: Blowing the pole pieces so that a plurality of the pole pieces are stacked to form the battery core; When the pole piece forms the battery core, the battery core and the connecting diaphragm are cut off.

7. The battery cell stacking method according to claim 6, characterized in that: The step of blowing the pole pieces to stack a plurality of the pole pieces to form the battery core comprises: Blowing is performed near the connection between two adjacent pole pieces so that a plurality of pole pieces are stacked to form the battery core.

8. The battery cell stacking method according to claim 6, characterized in that: The battery cell stacking method further comprises: When one of the pole pieces is stacked onto the battery core, the battery core is controlled to move downward.

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