Laminated battery cell folding mechanism and laminated battery cell folding method

Abstract

The embodiments of the present invention provide a laminated battery cell folding mechanism and a laminated battery cell folding method, which relate to the field of lithium battery production. The laminated battery cell folding mechanism is used to fold a composite unit sheet, including a stacking table and at least two blowing components; the composite unit sheet falls from above the stacking table to the stacking table, the blowing component is arranged above the stacking table, and the two blowing components are arranged on both sides of the composite unit sheet, respectively, for alternately blowing air toward the composite unit sheet during the falling process of the composite unit sheet, so that the composite unit sheet is folded in a Z shape on the stacking table. The blowing method is adopted to realize the rapid folding of the composite laminated unit and improve the stacking efficiency. At the same time, this folding method is a non-contact folding method, which can effectively avoid the problem of surface damage of the composite laminated unit.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery production, and in particular to a laminated battery core folding mechanism and a laminated battery core folding method. Background Art

[0002] In the manufacturing process of laminated cells, the composite unit sheet formed by the diaphragm and the electrode sheet needs to be folded in a Z shape to form a laminated cell. At present, most of the process methods used are pin-assisted folding and brush-assisted folding, that is, corresponding folding tools are needed to complete the folding of the composite unit sheet.

[0003] This folding method has the following defects: for example, when using clamping needles or brushes to assist in folding, the clamping needles or brushes are in direct contact with the composite unit sheet, and there is a risk of scratching and damaging the surface of the composite laminate unit, affecting the quality of the laminate; and this type of folding process is difficult to improve in speed and efficiency. Summary of the invention

[0004] The objectives of the present invention include, for example, providing a stacked battery cell folding mechanism and a stacked battery cell folding method, which can quickly and efficiently complete the stacking of composite unit sheets, have high folding efficiency, and the folding process does not contact the composite unit sheets, will not damage the surface of the composite unit sheets, and the folded stacked battery cells have higher quality.

[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 stacked cell folding mechanism for folding a composite unit sheet; the stacked cell folding mechanism includes a stacking table and at least two blowing components; the composite unit sheet drops from above the stacking table to the stacking table, the blowing component is arranged above the stacking table, and the two blowing components are respectively arranged on both sides of the composite unit sheet, for alternately blowing air toward the composite unit sheet so that the composite unit sheet is folded in a Z shape on the stacking table.

[0007] In an optional embodiment, it further includes a blowing nozzle moving assembly, wherein the blowing nozzle moving assembly is connected to the blowing assembly to drive the blowing assembly to rise or fall.

[0008] In an optional embodiment, it also includes a frame and a folding position detection component, wherein the folding position detection component is arranged on the frame and located on both sides of the descending path of the composite unit sheet, and is used to detect the folding position of the composite unit sheet; the blowing component is used to set the blowing time according to the folding position detected by the folding position detection component.

[0009] In an optional embodiment, the two blowing components include a first blowing member and a second blowing member, the first blowing member is arranged on one side of the composite unit sheet, and the second blowing member is arranged on the other side of the composite unit sheet;

[0010] The composite unit sheet includes a pole piece area and a membrane folding area, and the pole piece area and the membrane folding area are arranged alternately; the first blowing member and the second blowing member are arranged corresponding to two adjacent membrane folding areas respectively.

[0011] In an optional embodiment, the first blowing member includes a first air source, a first nozzle and a first control unit, and the second blowing member includes a second nozzle, a second air source and a second control unit, the first air source is connected to the first nozzle, and the first control unit is arranged between the first air source and the first nozzle; the second nozzle is connected to the second air source, and the second control unit is arranged between the second air source and the second nozzle; the first control unit and the second control unit are used to control the first nozzle and the second nozzle to blow alternately in sequence.

[0012] In an optional embodiment, the blowing assembly includes a first blowing nozzle, a second blowing nozzle, a third blowing nozzle and a fourth blowing nozzle, the first blowing nozzle and the second blowing nozzle are arranged at one side of the composite unit sheet, and the third blowing nozzle and the fourth blowing nozzle are arranged at another side of the composite unit sheet;

[0013] The first blowing nozzle and the third blowing nozzle are arranged opposite to each other and are used for blowing air alternately toward the composite unit sheet; the second blowing nozzle and the fourth blowing nozzle are arranged opposite to each other and are used for blowing air alternately toward the composite unit sheet so that the composite unit sheet is folded in a Z shape on the lamination table.

[0014] In an optional embodiment, the first air blowing nozzle and the second air blowing nozzle blow air alternately with equal gaps, and the third air blowing nozzle and the fourth air blowing nozzle blow air alternately with equal gaps.

[0015] In an optional embodiment, it further includes a frame, and the first blowing nozzle, the second blowing nozzle, the third blowing nozzle and the fourth blowing nozzle are fixed on the frame; during the downward movement of the composite unit sheet, each blowing nozzle rotates from top to bottom to blow air.

[0016] In an optional embodiment, the blowing assembly adopts an intermittent blowing device.

[0017] In an optional embodiment, the intermittent blowing device adopts a pulse blower or a rotary blower. The pulse blower provides a pulse blowing airflow on both sides of the composite unit sheet to achieve Z-shaped folding of the composite unit sheet; the rotary blower provides a rotary blowing airflow, and the rotary blowing airflow applies a rotary blowing force from top to bottom to both sides of the composite unit sheet within a preset rotation angle range to achieve Z-shaped folding of the composite unit sheet.

[0018] In an optional embodiment, a limiting member is provided on the lamination platform, and the limiting member is used to limit the folded composite unit sheet on both sides.

[0019] In an optional embodiment, the limiting member includes a first side dam and a second side dam, the first side dam and the second side dam are arranged on opposite sides of the stacking platform, and the folded composite unit is arranged flat between the first side dam and the second side dam.

[0020] In a second aspect, an embodiment of the present invention provides a laminated battery cell folding method, comprising:

[0021] Control the unloading of composite unit sheets from above the lamination table;

[0022] detecting a folding position of the composite unit sheet;

[0023] Controlling the blowing assembly to blow air toward the folding position so that the composite unit sheet is folded into a laminated battery core;

[0024] The stacked battery cells are controlled to be stacked on the stacking table.

[0025] The laminated battery cell folding mechanism and laminated battery cell folding method provided by the embodiments of the present invention have beneficial effects including, for example:

[0026] The laminated battery cell folding mechanism provided in the embodiment of the present invention is used for folding a composite unit sheet. By setting at least two groups of blowing components, the two groups of blowing components are arranged on both sides of the composite unit sheet, and air is blown alternately toward the composite unit sheet during the falling process of the composite unit sheet, so that the composite unit sheet is bent under the action of the blowing airflow, thereby completing the Z-shaped folding process of the composite unit sheet, and the folded laminated battery cell falls and is stacked on the lamination table. Since the blowing component is used to spray airflow toward the composite unit sheet to fold it, the folding process does not have any hard objects in contact with the surface of the composite unit sheet, and it belongs to non-contact lamination, so it will not cause damage to the surface of the composite unit sheet, which is beneficial to improving the quality of the laminated battery cell and has high folding efficiency.

[0027] In the folding method of the laminated battery provided by the embodiment of the present invention, the composite unit sheet is unloaded from the top of the laminating table, and is bent at the folding position by the airflow during the falling process, and is stacked on the laminating table after bending to complete the laminating process. This method has higher laminating efficiency, and the surface of the composite unit sheet will not be contacted during the laminating process, thus avoiding damage to the surface of the composite unit sheet, which is conducive to improving the quality of the laminated battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 A schematic diagram of a first structure of a laminated battery core folding mechanism provided in a specific embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a structure of a composite unit sheet of a laminated battery cell folding mechanism provided in a specific embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a second structure of a laminated battery core folding mechanism provided in a specific embodiment of the present invention;

[0032] Figure 4 A schematic diagram of an application scenario structure of a first blowing component of a laminated battery core folding mechanism provided by a specific embodiment of the present invention;

[0033] Figure 5 A schematic diagram of another application scenario structure of a blowing component 200 of a laminated battery core folding mechanism provided by a specific embodiment of the present invention;

[0034] Figure 6 A schematic diagram of an application scenario structure of a second blowing component of a laminated battery core folding mechanism provided by a specific embodiment of the present invention;

[0035] Figure 7 A schematic diagram of an application scenario structure of an air blowing nozzle moving assembly of a laminated battery core folding mechanism provided by a specific embodiment of the present invention;

[0036] Figure 8 Another structural schematic diagram of a laminated battery cell folding mechanism provided in a specific embodiment of the present invention.

[0037] Icons: 100-stacking table; 101-limiting part; 200-blowing assembly; 210-first blowing part; 211-first nozzle; 212-first air source; 213-first control unit; 220-second blowing part; 221-second nozzle; 222-second air source; 223-second control unit; 231-first blowing nozzle; 232-second blowing nozzle; 233-third blowing nozzle; 234-fourth blowing nozzle; 301-stacking cell; 300-composite unit cell; 310-diaphragm; 320-positive electrode sheet; 330-negative electrode sheet; 311-first diaphragm; 312-second diaphragm; 331-electrode area; 333-diaphragm folding area; 401-folding position detection component; 103-blowing nozzle moving component. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Figure 1 For a schematic diagram of a first structure of a laminated battery core folding mechanism provided in a specific embodiment of the present invention, please refer to Figure 1 .

[0045] The present embodiment provides a laminated cell folding mechanism for folding a composite unit sheet 300. The laminated cell folding mechanism includes a lamination platform 100 and a blowing assembly 200. The composite unit sheet 300 descends from the top of the lamination platform 100 to the lamination platform 100. The blowing assembly 200 is arranged above the lamination platform 100, and two blowing assemblies 200 are respectively arranged on both sides of the descending path of the composite unit sheet 300, and are used to alternately blow air toward the composite unit sheet 300, so that the composite unit sheet 300 is folded in a Z shape on the lamination platform 100 to form a laminated cell 301. The laminated cell folding mechanism uses the blowing assembly 200 to alternately blow air to the composite unit sheet 300, so that the composite unit sheet 300 is bent to realize the lamination process. Since the air blowing folding method is used, there will be no direct contact with the composite unit sheet 300, thus avoiding damage to the surface of the composite unit sheet 300, which is beneficial to improving the quality of the stacked battery cell 301; and the composite unit sheet 300 falls from above the stacking platform 100, and is blown by the air flow during the falling process to complete the Z-shaped folding, and after folding, it falls and is stacked on the stacking platform 100, which greatly improves the folding efficiency of the composite unit sheet 300.

[0046] Figure 2 A schematic diagram of a structure of a composite unit sheet 300 of a laminated battery cell folding mechanism provided by a specific embodiment of the present invention, please refer to Figure 2 .

[0047] Optionally, in order to improve the lamination efficiency, the composite unit sheet 300 can be discharged through a material discharge assembly, which includes but is not limited to an unwinding roller. The material discharge assembly can be arranged directly above the lamination platform 100, that is, the composite unit sheet 300 falls from directly above the lamination platform 100 to form a material strip perpendicular to the lamination platform 100. It is easy to understand that the material strip, i.e., the composite unit sheet 300, includes a diaphragm 310 and pole pieces arranged on the diaphragm 310 at intervals, i.e., includes alternately arranged pole piece areas 331 and diaphragm folding areas 333, the pole piece area 331 refers to the area where the pole pieces are arranged on the diaphragm 310, and the diaphragm folding area 333 refers to the gap area between the pole pieces. The folding process in this embodiment is to bend the diaphragm folding area 333 to achieve Z-shaped folding of the material strip. The electrode sheet includes a positive electrode sheet 320 and a negative electrode sheet 330. The arrangement of the positive electrode sheet 320, the negative electrode sheet 330 and the separator 310 is different according to the type of the laminated battery cell 301 and the actual application product. Figure 2As shown, the positive electrode sheets 320 are spaced between two layers of the diaphragm 310, the gap between two adjacent positive electrode sheets 320 is the diaphragm folding area 333, and the negative electrode sheets 330 are spaced and staggered on the outside of the diaphragms 310 on both sides. Of course, in other optional embodiments, the arrangement of the positive electrode sheets 320, the negative electrode sheets 330 and the diaphragm 310 can also be flexibly adjusted, which is not specifically limited here.

[0048] Figure 3 For a schematic diagram of a second structure of a laminated battery core folding mechanism provided in a specific embodiment of the present invention, please refer to Figure 3 .

[0049] Furthermore, the laminated cell folding mechanism also includes a frame (not shown) and a folding position detection component 401. The folding position detection component 401 is arranged on the frame and located on both sides of the descending path of the composite unit sheet 300, and is used to detect the folding position of the composite unit sheet 300; the blowing component 200 is used to set the blowing time according to the folding position detected by the folding position detection component 401, and blow air to the folding position. It should be noted that the folding position detection component 401 is detachably arranged on the frame, and the folding position detection component 401 can realize position adjustment according to pole pieces of different widths, and is used for Z-shaped folding of composite unit sheets 300 of different specifications, and accurately detects the folding position of the composite unit sheet 300.

[0050] Optionally, the two blowing assemblies 200 include a first blowing member 210 and a second blowing member 220, wherein the first blowing member 210 is disposed on one side of the composite unit sheet 300 and the second blowing member 220 is disposed on the other side of the composite unit sheet 300. The first blowing member 210 and the second blowing member 220 are disposed corresponding to two adjacent membrane folding areas 333, respectively. In detail, the diaphragm 310 includes a first diaphragm 311 and a second diaphragm 312, the first blowing member 210 is arranged on a side of the first diaphragm 311 away from the second diaphragm 312, the second blowing member 220 is arranged on a side of the second diaphragm 312 away from the first diaphragm 311, and the first blowing member 210 is arranged corresponding to a diaphragm folding area 333, for blowing air to the diaphragm folding area 333, and the blowing air flow blows from the first diaphragm 311 to the second diaphragm 312; the second blowing member 220 is arranged corresponding to another adjacent diaphragm folding area 333, for blowing air to the diaphragm folding area 333, and the blowing air flow blows from the second diaphragm 312 to the first diaphragm 311, and the diaphragm folding area 333 corresponding to the second blowing member 220 is adjacent to the diaphragm folding area 333 corresponding to the first blowing member 210. The airflows of the first blowing member 210 and the second blowing member 220 are blown out in opposite directions, and the first blowing member 210 and the second blowing member 220 blow out airflows alternately in sequence. Optionally, the first blowing member 210 is closer to the lamination table 100 than the second blowing member 220, and after the first blowing member 210 blows out the airflow, the second blowing member 220 blows out the airflow. This is conducive to more orderly stacking of the composite unit sheets 300 on the lamination table 100.

[0051] It should be noted that the first blowing member 210 and the second blowing member 220 can also be set at the same height. The "same height" in the text refers to approximately the same height position, and is not limited to absolute height equality. In this way, during the falling process of the composite unit sheet 300, after the folding position detection component 401 detects a membrane folding area 333, the first blowing member 210 blows air, after detecting the next membrane folding area 333, the second blowing member 220 blows air, and after detecting the next membrane folding area 333, the first blowing member 210 blows air, and so on. The first blowing member 210 and the second blowing member 220 blow air alternately with equal intervals to achieve Z-shaped folding of the composite unit sheet 300. The folding position detection component 401 includes but is not limited to a CCD camera or other identification sensors. For example, when the folding position detection component 401 detects the membrane folding area 333 at A in the figure, the first blowing member 210 blows air to the left, the composite unit sheet 300 is bent at A, and the membrane folding area 333 at A moves to the left under the action of the airflow, and falls and stacks on the lamination platform 100; the first blowing member 210 stops blowing, and the second blowing member 220 blows air to the right, the composite unit sheet 300 is bent at B, and the membrane folding area 333 at B moves to the right under the action of the airflow, and falls and stacks on the lamination platform 100. This process is repeated to achieve the Z-shaped folding of the composite unit sheet 300. Of course, it is not limited to this. In other optional embodiments, the first blowing member 210 and the second blowing member 220 can also blow air at the same time and stop at the same time, which can also achieve the Z-shaped folding of the composite unit sheet 300, which is not specifically limited here.

[0052] Figure 4 For a schematic diagram of the application scenario structure of a first blowing component 200 of a laminated battery core folding mechanism provided by a specific embodiment of the present invention, please refer to Figure 4 .

[0053] The blowing assembly 200 includes an air source and a nozzle. Optionally, the first blowing member 210 includes a first nozzle 211, a first air source 212 and a first control unit 213. The first nozzle 211 is connected to the first air source 212, and the first control unit 213 is disposed between the first nozzle 211 and the first air source 212. The second blowing member 220 includes a second nozzle 221, a second air source 222 and a second control unit 223. The second nozzle 221 is connected to the second air source 222, and the second control unit 223 is disposed between the second nozzle 221 and the second air source 222. The first control unit 213 and the second control unit 223 are used to control the first nozzle 211 and the second nozzle 221 to blow air alternately in sequence. The first control unit 213 and the second control unit 223 respectively include a flow controller (not shown), a pressure controller (not shown) and a timer (not shown), etc. The gas source is connected to the nozzle through a pipeline, and the flow controller and the pressure controller are arranged on the pipeline between the gas source and the nozzle. The flow controller is used to control the flow rate of the airflow ejected from the nozzle, the pressure controller is used to control the pressure of the airflow ejected from the nozzle, and the timer is used to control the time of the nozzle ejecting the airflow. It can be understood that according to the incoming material speed of the composite unit sheet 300, the time of the nozzle ejecting the airflow can be flexibly set, and according to the materials and specifications of different types of composite unit sheets 300, the flow rate and pressure of the ejected airflow can be adjusted in real time. Alternatively, according to the actual folding effect of the composite unit sheet 300, such as the neatness of the laminated battery 301, the parameters of the first blowing member 210 and the second blowing member 220 are adjusted in time to improve the lamination efficiency and lamination quality.

[0054] Figure 5 For a schematic diagram of another application scenario structure of a blowing component 200 of a laminated battery core folding mechanism provided by a specific embodiment of the present invention, please refer to Figure 5 .

[0055] Optionally, the number of the first blowing member 210 and the second blowing member 220 may be more than one, for example, two, three or more. In this embodiment, two are taken as an example for explanation. Two first blowing members 210 are arranged at intervals on one side of the descending path of the composite unit sheet 300, and two second blowing members 220 are arranged at intervals on the other side of the descending path of the composite unit sheet 300. Each blowing member includes a blowing nozzle, and a total of four blowing nozzles are arranged. That is, the first blowing nozzle 231 and the second blowing nozzle 232 are arranged at intervals on one side of the composite unit sheet 300, and the third blowing nozzle 233 and the fourth blowing nozzle 234 are arranged at intervals on the other side of the composite unit sheet 300. The first blowing nozzle 231 and the third blowing nozzle 233 are arranged oppositely, and are used to alternately blow air toward the equal gaps of the composite unit sheet 300; the second blowing nozzle 232 and the fourth blowing nozzle 234 are arranged oppositely, and are used to alternately blow air toward the equal gaps of the composite unit sheet 300, so that the composite unit sheet 300 is folded in a Z shape on the stacking table 100. Furthermore, the first air blowing nozzle 231 and the second air blowing nozzle 232 blow air alternately with equal gaps, and the third air blowing nozzle 233 and the fourth air blowing nozzle 234 blow air alternately with equal gaps.

[0056] It can be understood that the first air blowing nozzle 231 and the second air blowing nozzle 232 are arranged in upper and lower intervals according to the width of the pole piece interval along the descending direction of the composite unit sheet 300. The third air blowing nozzle 233 and the fourth air blowing nozzle 234 are arranged in upper and lower intervals according to the width of the pole piece interval along the descending direction of the composite unit sheet 300. The first air blowing nozzle 231 and the third air blowing nozzle 233 can be arranged at the same height, and the second air blowing nozzle 232 and the fourth air blowing nozzle 234 can be arranged at the same height. Of course, it is not limited to this. The first air blowing nozzle 231, the second air blowing nozzle 232, the third air blowing nozzle 233 and the fourth air blowing nozzle 234 can also be flexibly arranged. According to the folding position detected by the folding position detection component 401, the two air blowing nozzles of the same height blow alternately and intermittently, and the upper and lower air blowing nozzles on the same side blow alternately and intermittently to achieve Z-shaped folding of the composite unit sheet 300.

[0057] Optionally, the first blowing nozzle 231 , the second blowing nozzle 232 , the third blowing nozzle 233 and the fourth blowing nozzle 234 are fixed on the frame; during the downward movement of the composite unit sheet 300 , each blowing nozzle rotates from top to bottom to blow air, thereby achieving Z-shaped folding of the composite unit sheet 300 .

[0058] Figure 6 For a schematic diagram of the application scenario structure of a second blowing component 200 of a laminated battery core folding mechanism provided by a specific embodiment of the present invention, please refer to Figure 6 .

[0059] In this embodiment, the blowing assembly 200 uses an intermittent blowing device, and the intermittent blowing device uses a pulse blower or a rotary blower. The pulse blower provides a pulse blowing airflow on both sides of the composite unit sheet 300 to achieve the Z-shaped folding of the composite unit sheet 300; the rotary blower provides a rotary blowing airflow, and the rotary blowing airflow applies a blowing force from top to bottom to both sides of the composite unit sheet 300 within a preset rotation angle range to achieve the Z-shaped folding of the composite unit sheet 300. In detail, Figure 4 2 is a schematic diagram of the structure of the pulse blower. The first nozzle 211 and the second nozzle 221 use pulse blowing. The pulse blower sprays air once at a preset time interval, that is, alternately switches between the two working states of spraying air and stopping spraying. The preset time can be two seconds, 5 seconds or 10 seconds, etc. The preset time should match the incoming material speed of the composite unit sheet 300. The accurate folding position is detected by the folding position detection component 401, so that each sprayed air flow is blown on the diaphragm folding area 333 of the material strip. Figure 6 What is shown is a schematic diagram of the structure of the rotary blower, in which the first nozzle 211 and the second nozzle 221 adopt rotary blowing. The rotary blower is in a cyclic rotation state when in working state, such as rotating 360 degrees around a rotating shaft, and the rotating shaft is fixed on a frame. The rotary blower provides a rotary blowing airflow, and the rotary blowing airflow applies a rotary blowing force from top to bottom to both sides of the composite unit sheet 300 within a preset rotation angle range, thereby realizing Z-shaped folding of the composite unit sheet 300.

[0060] It should be understood that when the rotary blower rotates 360 degrees, only the airflow blown within a preset angle range (e.g., 0 to 30 degrees) will act on the diaphragm folding area 333 of the material strip, causing the composite unit sheet 300 to bend, and the airflow ejected at other angles will not act on the composite unit sheet 300, nor will it interfere with the stacking process of the composite unit sheet 300.

[0061] Figure 7 For a schematic diagram of an application scenario structure of a blowing nozzle moving component 103 of a laminated battery core folding mechanism provided by a specific embodiment of the present invention, please refer to Figure 7 .

[0062] As the composite unit sheet 300 is continuously stacked on the lamination table 100, the height of the laminated battery core 301 on the lamination table 100 will continue to increase. When the lamination table 100 is in a fixed state, the blowing assembly 200 needs to move upward as the height of the laminated battery core 301 increases. Optionally, the laminated battery core folding mechanism also includes a blowing nozzle moving assembly 103, which is connected to the blowing assembly 200, and the blowing nozzle moving assembly 103 is used to adjust the position of the blowing assembly 200, driving the blowing assembly 200 to rise or fall. Optionally, the blowing nozzle moving assembly 103 can adopt a linear cylinder, a crank slider structure, a hydraulic lifting structure or a lead screw nut structure, which is not specifically limited here. In this embodiment, the blowing nozzle moving assembly 103 is used to drive the blowing nozzle to move to adjust the position of the blowing airflow on the composite unit sheet 300.

[0063] Optionally, in order to improve the stacking neatness of the laminated battery cell 301, a stopper 101 is provided on the lamination platform 100, and the stopper 101 is used to limit the folded composite unit sheet 300. In this embodiment, the stopper 101 includes a first rib and a second rib, and the first rib and the second rib are arranged on opposite sides of the lamination platform 100. The folded composite unit is flatly stacked between the first rib and the second rib. It is easy to understand that the distance between the first rib and the second rib is adapted to the size (length or width) of the laminated battery cell 301, so that the stacked laminated battery cell 301 meets the stacking neatness requirement. Of course, it is not limited to this. In other optional embodiments, the stopper 101 can also include a third rib and a fourth rib arranged oppositely, wherein the first rib and the second rib are used to limit the neatness of the laminated battery cell 301 in the width direction, and the third rib and the fourth rib are used to limit the neatness of the laminated battery cell 301 in the length direction, so as to improve the lamination quality of the laminated battery cell 301.

[0064] Optionally, the height of the stopper 101 can be designed according to actual conditions. For example, the height of the stopper 101 is not lower than the position of the two diaphragm folding areas 333, so as to enhance the stopper effect and further improve the stacking uniformity of the stacked battery cell 301. Figure 8 As shown. It is easy to understand that a blowing hole (not shown) is provided on the limit member 101, and the position of the blowing hole corresponds to the position of the blowing component 200, so that the blowing airflow of the blowing component 200 can pass through the blowing hole to act on the composite unit sheet 300, so as to achieve the Z-shaped folding of the composite unit sheet 300. In addition, the limit member 101 can be made of a transparent material, so that the folding position detection component 401 can detect the diaphragm folding area 333 of the composite unit sheet 300 through the limit member 101. Alternatively, a detection hole (not shown) is also provided on the limit member 101, and the detection hole is arranged corresponding to the folding position detection component 401, so that the folding position detection component 401 can detect the diaphragm folding area 333 of the composite unit sheet 300.

[0065] This embodiment also provides a laminated battery cell folding method, which is used to fold the composite unit sheet 300 so that the composite unit sheet 300 is folded into a laminated battery cell 301. The laminated battery cell folding method mainly includes the following steps:

[0066] Control the composite unit sheet 300 to be unloaded from the top of the lamination platform 100; detect the folding position of the composite unit sheet 300; control the blowing assembly 200 to blow air toward the folding position, so that the composite unit sheet 300 is folded into a laminated battery cell 301; control the laminated battery cell 301 to be stacked on the lamination platform 100. In detail, the composite unit sheet 300 is unloaded by the unloading assembly arranged above the lamination platform 100, so that the composite unit sheet 300 material belt enters the lamination platform 100 in a direction perpendicular to the lamination platform 100, and the blowing assembly 200 is arranged between the lamination platform 100 and the unloading assembly. Optionally, the blowing assembly adopts two intermittent blowing devices, which are respectively arranged on both sides of the composite unit sheet 300, wherein one blowing assembly 200 is arranged on the side of the first diaphragm 311 away from the second diaphragm 312, and the other blowing assembly 200 is arranged on the side of the second diaphragm 312 away from the first diaphragm 311, and the two blowing assemblies 200 correspond to two adjacent diaphragm folding areas 333. During the falling process of the composite unit sheet 300, the folding position detection assembly 401 can accurately detect the diaphragm folding area 333, and the blowing assembly 200 is connected to the folding position detection assembly 401 by signal. When the folding position detection assembly 401 detects the diaphragm folding area 333, the two blowing assemblies 200 blow air to the diaphragm folding area 333 of the composite unit sheet 300 in turn, so that the composite unit sheet 300 can be folded in a Z shape to form a laminated battery cell 301. The stacked battery cells 301 are dropped and stacked on the stacking platform 100 , and a stopper 101 is provided on the stacking platform 100 to improve the stacking neatness of the stacked battery cells 301 .

[0067] In the stacked cell folding method of this embodiment, since the blowing assembly 200 is used to blow air to the composite unit sheet 300 to achieve folding, there is no direct contact with the composite unit sheet 300, thus avoiding damage to the surface of the composite unit sheet 300, which is beneficial to improving the quality of the stacked cell 301. In addition, the folding method using air blowing has higher folding efficiency, which is beneficial to improving the quality and efficiency of stacking.

[0068] In summary, the embodiments of the present invention provide a laminated battery cell folding mechanism and a laminated battery cell folding method, which have the following beneficial effects:

[0069] The present embodiment provides a laminated battery cell folding mechanism, which uses a blowing assembly 200 to blow air to the composite unit sheet 300, so that the composite unit sheet 300 is bent in the diaphragm folding area 333. Two blowing assemblies 200 are arranged on both sides of the composite unit sheet 300 to blow air in sequence to achieve Z-shaped folding of the composite unit sheet 300. Since there is no actual contact with the composite unit sheet 300 during the folding process, damage to the surface of the composite unit sheet 300 is effectively avoided. In addition, compared with the existing folding process, this laminated battery cell folding mechanism is more efficient, easier to control, and is conducive to improving the stacking accuracy.

[0070] This embodiment also provides a laminated cell folding method, using a blowing assembly 200 to blow air on the composite unit sheet 300, the blowing assembly 200 can be completed by a pulse blower or a rotary blower, two blowing assemblies 200 are arranged on both sides of the composite unit sheet 300, and in the process of the composite unit sheet 300 falling, the composite unit sheet 300 is blown in turn to achieve Z-shaped folding, and the folded composite unit sheet 300 is stacked on the lamination table 100, and the limiting member 101 on the lamination table 100 limits the folded laminated cell 301 to improve the lamination accuracy of the laminated cell 301. The laminated cell folding method does not directly contact the composite unit sheet 300 during the folding process, avoids damage to the surface of the composite unit sheet 300, and can achieve rapid folding and improve folding efficiency.

[0071] 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 laminated battery cell folding mechanism, characterized in that: Used for folding composite unit sheets; the laminated battery cell folding mechanism comprises a material unloading component, a lamination platform and at least two blowing components; the material unloading component is arranged above the lamination platform so that the composite unit sheet can be dropped from above the lamination platform to the lamination platform, the blowing component is arranged above the lamination platform, and the two blowing components are respectively arranged on both sides of the composite unit sheet, and are used for alternately blowing air toward the composite unit sheet so that the composite unit sheet can be folded in a Z shape on the lamination platform.

2. The laminated battery core folding mechanism according to claim 1, characterized in that: It also includes an air blowing nozzle moving component, which is connected to the air blowing component to drive the air blowing component to rise or fall.

3. The laminated battery core folding mechanism according to claim 1, characterized in that: It also includes a frame and a folding position detection component, wherein the folding position detection component is arranged on the frame and located on both sides of the descending path of the composite unit sheet, and is used to detect the folding position of the composite unit sheet; the blowing component is used to set the blowing time according to the folding position detected by the folding position detection component.

4. The laminated battery core folding mechanism according to claim 1, characterized in that: The two blowing components include a first blowing member and a second blowing member, wherein the first blowing member is disposed on one side of the composite unit sheet, and the second blowing member is disposed on the other side of the composite unit sheet; The composite unit sheet includes a pole piece area and a membrane folding area, and the pole piece area and the membrane folding area are arranged alternately; the first blowing member and the second blowing member are arranged corresponding to two adjacent membrane folding areas respectively.

5. The laminated battery core folding mechanism according to claim 4, characterized in that: The first blowing member includes a first air source, a first nozzle and a first control unit, and the second blowing member includes a second nozzle, a second air source and a second control unit. The first air source is connected to the first nozzle, and the first control unit is arranged between the first air source and the first nozzle; the second nozzle is connected to the second air source, and the second control unit is arranged between the second air source and the second nozzle; the first control unit and the second control unit are used to control the first nozzle and the second nozzle to blow air alternately in sequence.

6. The laminated battery core folding mechanism according to claim 1, characterized in that: The air blowing assembly comprises a first air blowing nozzle, a second air blowing nozzle, a third air blowing nozzle and a fourth air blowing nozzle, wherein the first air blowing nozzle and the second air blowing nozzle are arranged at intervals on one side of the composite unit sheet, and the third air blowing nozzle and the fourth air blowing nozzle are arranged at intervals on the other side of the composite unit sheet; The first blowing nozzle and the third blowing nozzle are arranged opposite to each other and are used for blowing air alternately toward the composite unit sheet; the second blowing nozzle and the fourth blowing nozzle are arranged opposite to each other and are used for blowing air alternately toward the composite unit sheet so that the composite unit sheet is folded in a Z shape on the lamination table.

7. The laminated battery core folding mechanism according to claim 6, characterized in that: The first air blowing nozzle and the second air blowing nozzle blow air alternately with equal intervals, and the third air blowing nozzle and the fourth air blowing nozzle blow air alternately with equal intervals.

8. The laminated battery core folding mechanism according to claim 6, characterized in that: It also includes a frame, and the first blowing nozzle, the second blowing nozzle, the third blowing nozzle and the fourth blowing nozzle are fixed on the frame; when the composite unit sheet moves downward, each blowing nozzle rotates from top to bottom to blow air.

9. The laminated battery core folding mechanism according to claim 1, characterized in that: The air blowing component adopts an intermittent air blowing device.

10. The laminated battery core folding mechanism according to claim 9, characterized in that: The intermittent blowing device adopts a pulse blower or a rotary blower; the pulse blower provides a pulse blowing airflow on both sides of the composite unit sheet to achieve Z-shaped folding of the composite unit sheet; the rotary blower provides a rotary blowing airflow, and the rotary blowing airflow applies a rotary blowing force from top to bottom to both sides of the composite unit sheet within a preset rotation angle range to achieve Z-shaped folding of the composite unit sheet.

11. The laminated battery core folding mechanism according to claim 1, characterized in that: The lamination platform is provided with a limiting member, and the limiting member is used to limit the two sides of the folded composite unit sheet.

12. A laminated battery cell folding method, applied to the laminated battery cell folding mechanism according to any one of claims 1 to 11, characterized in that: include: Control the unloading of composite unit sheets from above the lamination table; detecting a folding position of the composite unit sheet; Controlling the blowing assembly to blow air toward the folding position so that the composite unit sheet is folded into a laminated battery core; The stacked battery cells are controlled to be stacked on the stacking table.

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