Pole piece conveying belt and pole piece transfer device

Abstract

The invention provides a pole piece conveying belt and a pole piece transfer device.The pole piece conveying belt comprises a supporting plate, a belt and a driving part, the supporting plate comprises negative pressure adsorption areas and vacuum breaking areas which are alternately arranged in the first direction, and the negative pressure adsorption areas and the vacuum breaking areas are arranged in a separated mode; the negative pressure adsorption area comprises a plurality of first vacuum chambers which are arranged at intervals in the second direction and communicate with one another, the vacuum breaking area comprises second vacuum chambers and positive pressure chambers which are alternately arranged in the second direction, the multiple positive pressure chambers communicate with one another, and the multiple second vacuum chambers communicate with one another; the belt comprises a plurality of groups of adsorption holes and separation holes which are alternately formed in the second direction, each group of adsorption holes are communicated with the first vacuum chamber and the second vacuum chamber respectively, and each group of separation holes are communicated with the positive pressure chamber; the driving part is used for driving the belt to move along the first direction relative to the supporting plate, so that the pole piece adsorbed on the belt passes through the negative pressure adsorption area and the vacuum breaking area. The problem that the pole pieces are prone to skew or shift during transportation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing equipment, and more particularly, to a pole piece conveyor belt and a pole piece transfer device. Background Art

[0002] The production process of a stacked lithium battery mainly includes: feeding the positive and negative electrodes, unwinding and correcting deviation, cutting the pole pieces and cutting the outer rounded corners, transferring the pole pieces, detecting and adjusting the pole pieces, and Z-shaped stacking. In the production process of a stacked lithium battery, since the thickness of the pole piece is extremely small and the weight is light, the frictional force between the pole piece and the pole piece transport device is very small. In order to better transport the pole piece, the pole piece is usually adsorbed by negative pressure by the pole piece transport device.

[0003] In the process of transporting the pole piece by the existing pole piece transport device, in some areas, the pole piece needs to be taken away. However, it takes a certain amount of time for the positive pressure gas to reach the corresponding area, resulting in a time difference between when the pole piece is transported to the corresponding area and when the positive pressure gas reaches the corresponding area, thereby causing the pole piece to be skewed or offset, affecting the subsequent stacking accuracy of the pole piece. Summary of the Invention

[0004] The present invention aims to solve the problem that the existing pole piece conveyor belt is prone to skew or offset when transporting the pole piece.

[0005] To solve the above problems, a first aspect of the present invention provides a pole piece conveyor belt, comprising:

[0006] A pallet, including a negative pressure adsorption area and a vacuum breaking area alternately arranged in a first direction, the negative pressure adsorption area and the vacuum breaking area being separated; the negative pressure adsorption area includes a plurality of connected first vacuum chambers arranged at intervals in a second direction, the vacuum breaking area includes second vacuum chambers and positive pressure chambers alternately arranged in the second direction, a plurality of the positive pressure chambers being connected, and a plurality of the second vacuum chambers being connected;

[0007] A belt, the belt being arranged on the pallet, the belt including a plurality of groups of adsorption holes and a plurality of groups of separation holes, each group of the adsorption holes and each group of the separation holes being alternately arranged in the second direction, each group of the adsorption holes and each group of the separation holes extending in the first direction, each group of the adsorption holes being respectively connected to the first vacuum chamber and the second vacuum chamber, the belt adsorbing the pole piece through the adsorption holes, each group of the separation holes being connected to the positive pressure chamber, and the belt separating from the pole piece through the separation holes;

[0008] A driving member, the driving member being connected to the belt, the driving member being used to drive the belt to move relative to the pallet in the first direction, so that the pole piece adsorbed on the belt passes through the negative pressure adsorption area and the vacuum breaking area;

[0009] The first direction and the second direction are perpendicularly arranged.

[0010] Further, the number of the first vacuum chambers in the negative pressure adsorption area is the same as that of the second vacuum chambers in the vacuum breaking area. The first vacuum chambers and the second vacuum chambers are integrally formed and connected, and the first vacuum chambers and the second vacuum chambers are separated by a sealing block.

[0011] Further, the vacuum breaking area includes at least one row of vacuum breaking groups arranged along the first direction, and each of the vacuum breaking groups is independently arranged. The vacuum breaking group includes second vacuum chambers and positive pressure chambers arranged alternately along the second direction. Each positive pressure chamber is provided with at least one first air hole, and the first air hole is used to convey the positive pressure gas in the positive pressure chamber to the pole piece through the separation hole, so as to separate the pole piece from the belt.

[0012] Further, each group of the separation holes includes a first separation hole and a second separation hole. Along the first direction, a plurality of the first separation holes are uniformly arranged on the belt, and at least one of the second separation holes arranged along the second direction is arranged between any two adjacent first separation holes.

[0013] Further, the first separation hole is waist-shaped or oval-shaped, the second separation hole is circular, the projected area of the first separation hole along the third direction is larger than the projected area of the second separation hole along the third direction, and the projected area of the adsorption hole along the third direction is larger than the projected area of the second separation hole along the third direction. The third direction is perpendicular to the plane formed by the first direction and the second direction.

[0014] Further, each group of the adsorption holes includes a plurality of adsorption holes uniformly arranged on the belt along the first direction. The negative pressure gas in the first vacuum chamber is conveyed to the pole piece through the adsorption holes, and the negative pressure gas in the second vacuum chamber is conveyed to the pole piece through the adsorption holes.

[0015] Further, it further includes a positive pressure pipeline, a negative pressure pipeline and a speed regulation component. The negative pressure pipeline is arranged on the support plate along the second direction. The negative pressure adsorption area is provided with at least one negative pressure pipeline communicated with the first vacuum chamber, and the vacuum breaking area is provided with at least one negative pressure pipeline communicated with the second vacuum chamber and at least one positive pressure pipeline communicated with the positive pressure chamber; the speed regulation component is communicated with the positive pressure chamber, and the speed regulation component is used to adjust the flow rate of the positive pressure gas conveyed from the positive pressure chamber to the separation hole.

[0016] A second aspect of the present invention provides an electrode sheet transfer device, comprising a first electrode sheet conveyor belt and a second electrode sheet conveyor belt, wherein the first electrode sheet conveyor belt and the second electrode sheet conveyor belt are both arranged along a first direction, and the projections of the first electrode sheet conveyor belt and the second electrode sheet conveyor belt along a third direction at least partially overlap, a vacuum breaking zone is arranged in an area of ​​the first electrode sheet conveyor belt close to the second electrode sheet conveyor belt, and a negative pressure adsorption zone is arranged in an area of ​​the second electrode sheet conveyor belt close to the vacuum breaking zone, and the first electrode sheet conveyor belt and the second electrode sheet conveyor belt are both the electrode sheet conveyor belts described in the first aspect.

[0017] Furthermore, the vacuum breaking area of ​​the first pole piece conveyor belt close to the second pole piece conveyor belt is a pole piece dropping area;

[0018] It also includes a sheet discharging area and a sheet picking area, the sheet discharging area, the sheet dropping area and the sheet picking area are arranged in sequence along the first direction, the support plates of the sheet discharging area and the sheet picking area are both set as the vacuum breaking area, the support plate between the sheet discharging area and the sheet dropping area is set as the negative pressure adsorption area, the support plate between the sheet dropping area and the adsorption area is set as the negative pressure adsorption area, the sheet discharging area is set on the first electrode sheet conveyor belt, and the sheet picking area is set on the second electrode sheet conveyor belt.

[0019] Furthermore, it also includes a detection component, which is arranged on the first electrode sheet conveyor belt, and is arranged at one end of the electrode row area away from the electrode drop area, and the detection component is used to perform defect detection on the electrode sheet;

[0020] It also includes an iron removal component, which is provided on both the first pole piece conveyor belt and the second pole piece conveyor belt, and is used to remove iron from the first pole piece conveyor belt and the second pole piece conveyor belt;

[0021] It also includes a dust removal component, which is provided on the first pole piece conveyor belt and the second pole piece conveyor belt, and is used to remove dust from the first pole piece conveyor belt and the second pole piece conveyor belt.

[0022] The electrode conveyor belt of the present invention is provided with a negative pressure adsorption zone on the support plate, and the first vacuum chamber of the negative pressure adsorption zone is connected with the adsorption hole, so that the belt can adsorb the electrode by negative pressure, thereby improving the stability of electrode conveying, and can absorb dust on the belt by negative pressure, thereby reducing pollution to the electrode; a vacuum breaking zone is provided on the support plate, and its second vacuum chamber is connected with the adsorption hole, so that the belt can adsorb the electrode by negative pressure during the process of conveying the electrode, and its positive pressure chamber is connected with the separation hole, so that positive pressure can be applied to the surface of the electrode, thereby breaking the negative pressure applied to the electrode by the second vacuum chamber, so that the electrode and the belt are separated, and the second vacuum chamber and the positive pressure chamber of the vacuum breaking zone are alternately arranged along the second direction, so that the position of conveying positive pressure gas in the vacuum breaking zone and the position of conveying negative pressure gas are close, so that in the process of conveying the electrode, the positive pressure gas can break the negative pressure applied to the electrode faster and more stably, which is beneficial to reducing the time difference required for breaking the negative pressure applied to the electrode in the vacuum breaking zone during the conveying process of the electrode, thereby reducing or avoiding the skew or deviation caused by vacuum breaking during the transportation of the electrode. In addition, the alternating arrangement of the negative pressure adsorption zone and the vacuum breaking zone can achieve vacuum breaking during the transportation of the electrode, which is convenient for the transfer of the electrode. The negative pressure adsorption zone and the vacuum breaking zone are arranged separately, so that the negative pressure adsorption zone and the vacuum breaking zone can be adjusted independently without interfering with each other, which is beneficial to improving the vacuum breaking effect of the vacuum breaking zone.

[0023] The electrode sheet transfer device described in the present invention is provided with a first electrode sheet conveyor belt and a second electrode sheet conveyor belt. The area of ​​the first electrode sheet conveyor belt close to the second electrode sheet conveyor belt is set as a vacuum breaking area. The vacuum breaking area can separate the electrode sheet from the first electrode sheet conveyor belt, and when the positive pressure applied to the electrode sheet surface by the vacuum breaking area is greater than the negative pressure applied to the electrode sheet surface, the pressure on the electrode sheet surface can be converted into positive pressure, which can make the electrode sheet detach from the first electrode sheet conveyor belt and be blown up, and the belts in the first electrode sheet conveyor belt and the second electrode sheet conveyor belt continuously move along the conveying direction, and the electrode sheet moves toward the second electrode sheet conveyor belt under the action of inertia, and the area of ​​the second electrode sheet conveyor belt close to the vacuum breaking area is set as a negative pressure adsorption area, which can make the electrode sheet fall down and adsorb the electrode sheet. By switching between positive and negative pressures, not only can the electrode sheet be transferred from the first electrode sheet conveyor belt to the second electrode sheet conveyor belt more smoothly, but also the electrode sheet can be prevented from being skewed or offset during the transfer process, thereby reducing the influence of the transportation process on the production line utilization rate before the electrode sheet enters the lamination process, and effectively reducing the generation of defective electrode sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a pole piece transport device provided in an embodiment of the present invention;

[0025] Figure 2 Another schematic diagram of the structure of the electrode transfer device provided in an embodiment of the present invention;

[0026] Figure 3 Another structural schematic diagram of the pole piece transfer device provided in the embodiment of the present invention;

[0027] Figure 4 Partial structural schematic diagram of the first pole piece conveyor belt provided in the embodiment of the present invention;

[0028] Figure 5 is Figure 4 Side view structural schematic diagram;

[0029] Figure 6 is Figure 4 Top view structural schematic diagram;

[0030] Figure 7 Partial structural schematic diagram of the second pole piece conveyor belt provided in the embodiment of the present invention;

[0031] Figure 8 is Figure 7 Side view structural schematic diagram;

[0032] Figure 9 is Figure 7 Top view structural schematic diagram;

[0033] Figure 10 Structural schematic diagram of the belt and the pallet in the vacuum breaking area provided in the embodiment of the present invention;

[0034] Figure 11 is Figure 10 Structural schematic diagram of the middle pallet;

[0035] Figure 12 is Figure 10 Structural schematic diagram of the belt in it;

[0036] Figure 13 Structural schematic diagram of the dust removal component in the embodiment of the present invention;

[0037] Figure 14 Structural schematic diagram of the drive component in the embodiment of the present invention. Specific embodiments

[0038] The technical solution of the present invention will be clearly and elaborately described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown 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 construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In addition, in the description of the present invention, the meaning of "at least one" is one or more than one, and the meaning of "a plurality" is two or more than two, unless otherwise specifically defined.

[0039] In the description of this specification, the description of the term "as an alternative embodiment" means that the specific features, structures, materials or characteristics described in connection with this embodiment or example are included in at least one alternative embodiment or alternative example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0040] Combined with Figures 1 to 12 As shown, the first aspect of this embodiment provides a pole piece conveyor belt, including: a pallet 10, a belt 20, and a driving member 30, wherein:

[0041] The pallet 10 includes a negative pressure adsorption area 13 and a vacuum breaking area 14 that are alternately arranged along a first direction (i.e., the x-axis direction in Figure 2 , the transportation direction of the pole piece), the negative pressure adsorption area 13 and the vacuum breaking area 14 are separated, the negative pressure adsorption area 13 includes a plurality of connected first vacuum chambers 131 arranged at intervals along a second direction (i.e., the y-axis direction in Figure 2 ), the vacuum breaking area 14 includes second vacuum chambers 141 and positive pressure chambers 142 that are alternately arranged along the second direction, a plurality of positive pressure chambers 142 are connected, a plurality of second vacuum chambers 141 are connected, and the positive pressure chambers 142 and the second vacuum chambers 141 are not connected;

[0042] The belt 20 is arranged on the pallet 10. The belt 20 includes multiple groups of adsorption holes 21 and multiple groups of separation holes 22. Each group of adsorption holes 21 and each group of separation holes 22 are alternately arranged along the second direction. Each group of adsorption holes 21 and each group of separation holes 22 extend along the first direction. Each group of adsorption holes 21 is respectively communicated with the first vacuum chamber 131 and the second vacuum chamber 141. The belt 20 adsorbs the pole piece through the adsorption holes 21. Each group of separation holes 22 is communicated with the positive pressure chamber 142. The belt 20 separates from the pole piece through the separation holes 22;

[0043] The driving member 30 is connected to the belt 20. The driving member 30 is used to drive the belt 20 to move relative to the pallet along the first direction, so that the pole piece adsorbed on the belt 20 passes through the negative pressure adsorption area 13 and the vacuum breaking area 14. When the pole piece passes through the negative pressure adsorption area 13, the belt 20 adsorbs the pole piece to convey the pole piece. When the pole piece passes through the vacuum breaking area 14, the belt 20 separates from the pole piece to transfer the pole piece.

[0044] The pole piece conveyor belt provided in this embodiment, by arranging a negative pressure adsorption area on the pallet, the first vacuum chamber of the negative pressure adsorption area is communicated with the adsorption holes, so that the belt can adsorb the pole piece through negative pressure, improving the stability of pole piece conveying, and the dust on the belt can be sucked away by negative pressure, reducing the pollution to the pole piece; by arranging a vacuum breaking area on the pallet, its second vacuum chamber is communicated with the adsorption holes, so that the belt adsorbs the pole piece through negative pressure during the process of conveying the pole piece, its positive pressure chamber is communicated with the separation holes, and a positive pressure can be applied to the surface of the pole piece, thereby breaking the negative pressure applied to the pole piece by the second vacuum chamber, so that the pole piece and the belt are separated. The second vacuum chamber and the positive pressure chamber of the vacuum breaking area are alternately arranged along the second direction, so that the position where the vacuum breaking area conveys the positive pressure gas and the position where it conveys the negative pressure gas are close to each other, and during the conveying process of the pole piece, the positive pressure gas can break the negative pressure applied to the pole piece faster and more stably, which is beneficial to reducing the time difference required to break the negative pressure applied to the pole piece in the vacuum breaking area during the conveying process of the pole piece, so as to reduce or avoid the situation of skew or deviation caused by vacuum breaking during the transportation of the pole piece. In addition, the alternate arrangement of the negative pressure adsorption area and the vacuum breaking area can realize vacuum breaking during the conveying process of the pole piece, facilitating the transfer of the pole piece. The negative pressure adsorption area and the vacuum breaking area are separated, so that the negative pressure adsorption area and the vacuum breaking area can be independently adjusted without interfering with each other, which is beneficial to improving the vacuum breaking effect of the vacuum breaking area.

[0045] Based on the above embodiments, as an alternative embodiment, the number of the first vacuum chambers 131 in the negative pressure adsorption area 13 is the same as the number of the second vacuum chambers 141 in the vacuum breaking area 14. The first vacuum chambers 131 and the second vacuum chambers 141 are connected in a one-to-one correspondence. The first vacuum chambers 131 and the second vacuum chambers 141 are integrally formed and connected, and the first vacuum chambers 131 and the second vacuum chambers 141 are separated by a sealing block 15. Thus, the first vacuum chambers 131 and the second vacuum chambers 141 are connected in a one-to-one correspondence and integrally formed, which can avoid the instability of the negative pressure gas caused by the gap between the first vacuum chambers 131 and the second vacuum chambers 141 and affect the stability of the electrode sheet conveying. The first vacuum chambers 131 and the second vacuum chambers 141 are separated by the sealing block 15, which can realize the separated setting of the negative pressure adsorption area 13 and the vacuum breaking area 14, so that the negative pressure adsorption area 13 and the vacuum breaking area 14 can be independently adjusted without interference with each other. As another alternative embodiment, the first vacuum chambers 131 and the second vacuum chambers 141 are separately connected.

[0046] In this embodiment, along the second direction, the distance between any two adjacent first vacuum chambers 131 in the negative pressure adsorption area 13 is a, and the distance between any two adjacent second vacuum chambers 141 in the vacuum breaking area 14 is also a, that is, the distance between any two adjacent first vacuum chambers 131 is equal to the distance between any two adjacent second vacuum chambers 141. The positive pressure chamber 142 is arranged in the distance between any two adjacent second vacuum chambers 141. Thus, it is beneficial to further improve the stability of the electrode sheet conveying between different areas. In this embodiment, the specific numerical range of the distance a is not further limited, and those skilled in the art can set it according to the actual situation.

[0047] Based on the above embodiments, as an alternative embodiment, the vacuum breaking area 14 includes at least one vacuum breaking group arranged along the first direction. Each vacuum breaking group is independently arranged. The vacuum breaking group includes second vacuum chambers 141 and positive pressure chambers 142 arranged alternately along the second direction. Each positive pressure chamber 142 is provided with at least one first air hole 1421. The first air hole 1421 is used to convey the positive pressure gas in the positive pressure chamber 142 to the electrode sheet through the separation hole 22, so that the electrode sheet is separated from the belt 20.

[0048] Specifically, in combination with Figure 6As shown in the figure, two vacuum-breaking zones 14 are provided on the pallet 10. One of the vacuum-breaking zones 14 serves as the discharging zone A, and the other vacuum-breaking zone 14 serves as the dropping zone B. The discharging zone A includes a vacuum-breaking group, which includes second vacuum chambers 141 and positive pressure chambers 142 alternately arranged in the second direction. The second vacuum chambers 141 are spaced apart and connected to each other, and the positive pressure chambers 142 are spaced apart and connected to each other. Each positive pressure chamber 142 is arranged in a waist shape, and two or three first air holes 1421 are provided on each positive pressure chamber 142. Thus, with this arrangement of the discharging zone A, it can not only achieve vacuum breaking and separate the pole piece from the belt 20, but also reduce the processing cost. The dropping zone B includes twelve columns of vacuum-breaking groups. Two adjacent columns of vacuum-breaking groups can form a vacuum-breaking group, that is, the dropping zone B includes six vacuum-breaking groups, and each vacuum-breaking group includes two columns to match the length of the pole piece. Of course, according to the length of the pole piece, three adjacent columns of vacuum-breaking groups or four adjacent columns of vacuum-breaking groups can also form a vacuum-breaking group, and those skilled in the art can set it according to the actual situation. Each column of vacuum-breaking group includes second vacuum chambers 141 and positive pressure chambers 142 alternately arranged in the second direction. The second vacuum chambers 141 are spaced apart and connected to each other, and the positive pressure chambers 142 are spaced apart and connected to each other. Each positive pressure chamber 142 is arranged in a waist shape, and one first air hole 1421 is provided on each positive pressure chamber 142. Thus, with this arrangement of the dropping zone B, it is convenient to independently adjust each vacuum-breaking group, and the air supply volume and vacuum-breaking time of each vacuum-breaking group can be adjusted respectively to adapt to pole pieces of different lengths, and the magnitude of the positive pressure applied to the pole piece corresponding to each vacuum-breaking group can be adjusted respectively to realize the adsorption of the pole piece by the belt 20 or the separation of the belt 20 from the pole piece and blowing air to the pole piece, so as to better transport the pole piece.

[0049] Combined with Figure 7 As shown in the figure, one vacuum-breaking zone 14 is provided on the pallet 10. This vacuum-breaking zone 14 serves as the picking-up zone C. The picking-up zone C includes eight columns of vacuum-breaking groups. Each column of vacuum-breaking group includes second vacuum chambers 141 and positive pressure chambers 142 alternately arranged in the second direction. The second vacuum chambers 141 are spaced apart and connected to each other, and the positive pressure chambers 142 are spaced apart and connected to each other. Each positive pressure chamber 142 is arranged in a waist shape, and one first air hole 1421 is provided on each positive pressure chamber 142. Thus, with this arrangement of the picking-up zone C, it is convenient to independently adjust each column of vacuum-breaking groups, and the air supply volume can be adjusted according to the position of the pole piece (close to the negative pressure adsorption zone 13 or far from the negative pressure adsorption zone 13), which is beneficial to shortening the vacuum-breaking time, facilitating the transportation of the pole piece and improving the transportation efficiency of the pole piece.

[0050] On the basis of the above embodiments, as an optional implementation manner, combined with Figure 12As shown, each set of separation holes 22 includes a first separation hole 221 and a second separation hole 222. Along the first direction, a plurality of first separation holes 221 are evenly arranged on the belt 20, that is, the distance between any two adjacent first separation holes 221 is equal. At least one second separation hole 222 arranged along the second direction is provided between any two adjacent first separation holes 221. Exemplarily, in combination with Figure 12 as shown, two second separation holes 222 are provided between any two adjacent first separation holes 221, and the two separation holes 222 are arranged along the second direction. Both the first separation hole 221 and the second separation hole 222 are through holes. The first separation hole 221 is waist-shaped or oval-shaped, and the second separation hole 222 is circular. The projected area of the first separation hole 221 along the third direction (i.e., Figure 2 the z-axis direction in

[0051] ) is larger than the projected area of the second separation hole 222 along the third direction. Thus, by providing the first separation holes 221, the positive-pressure gas in each positive-pressure chamber 142 can be delivered to the first separation holes 221 through the first air holes 1421 and transferred to the electrode sheet to break the vacuum of the electrode sheet. By providing the second separation holes 222 between the first separation holes 221, the second separation holes 222 can connect different positive-pressure chambers 142, which is beneficial to increasing the contact area between the electrode sheet and the positive-pressure gas and achieving a better vacuum-breaking effect. In addition, the area of the first separation holes 221 is larger than the area of the second separation holes 222, which can not only increase the area of the vacuum-breaking region and improve the vacuum-breaking effect, but also the second separation holes 222 with a smaller area can reduce the probability of the belt 20 breaking, which is beneficial to improving the service life of the belt 20. Preferably, the projection of the first separation hole 221 along the third direction and the projection of the first air hole 1421 along the first direction at least partially overlap, so that the positive-pressure gas can reach the electrode sheet faster, which is beneficial to further improving the vacuum-breaking effect.Based on the above embodiments, as an alternative embodiment, each group of adsorption holes 21 includes a plurality of adsorption holes 21 uniformly arranged on the belt 20 along the first direction, that is, the distance between any two adjacent adsorption holes 21 is equal. The adsorption holes 21 are through holes. The negative-pressure gas in the first vacuum chamber 131 is transported to the electrode sheet through the adsorption holes 21, and the negative-pressure gas in the second vacuum chamber 141 is transported to the electrode sheet through the adsorption holes 21 to adsorb the electrode sheet on the belt 20. The projected area of the adsorption holes 21 in the third direction is larger than the projected area of the second separation holes 222 in the third direction, and the adsorption holes 21 can be arranged close to the second separation holes 222. Thus, the area of the adsorption holes 21 is larger than the area of the second separation holes 222. When adsorbing the electrode sheet in the negative-pressure adsorption area 13, the larger-area adsorption holes 21 can increase the contact area between the negative-pressure gas and the electrode sheet, improving the adsorption force on the electrode sheet. When breaking the vacuum of the electrode sheet in the vacuum-breaking area 14, the area of the adsorption holes 21 is larger than the area of the second separation holes 222, and the adsorption holes 21 are arranged close to the second separation holes 222, which can balance the positive pressure and negative pressure applied to the electrode sheet, enabling the electrode sheet and the belt 20 to be separated well and preventing the electrode sheet from being blown off, affecting the transportation of the electrode sheet.

[0052] In this embodiment, the specific areas of the first separation holes 221, the second separation holes 222, and the adsorption holes 21 are not further limited, and those skilled in the art can set them according to actual situations.

[0053] Based on the above embodiments, as an alternative embodiment, the electrode sheet conveyor belt further includes a positive-pressure pipeline 40, a negative-pressure pipeline 50, and a speed-regulating component 60. The negative-pressure pipeline 50 is arranged on the pallet 10 along the second direction. At least one negative-pressure pipeline 50 communicating with the first vacuum chamber 131 is provided in the negative-pressure adsorption area 13, and at least one negative-pressure pipeline 50 communicating with the second vacuum chamber 141 is provided in the vacuum-breaking area 14. At least one positive-pressure pipeline 40 communicating with the positive-pressure chamber 142 is provided in the vacuum-breaking area 14; the speed-regulating component 60 is communicated with the positive-pressure chamber 142, and the speed-regulating component 60 is used to adjust the flow rate of the positive-pressure gas transported from the positive-pressure chamber 142 to the separation holes 22.

[0054] Specifically, a plurality of negative pressure pipes 50 are arranged at intervals along the first direction, and each negative pressure pipe 50 is disposed at the end of the pallet 10 along the second direction. The negative pressure channels 70 are arranged in one-to-one correspondence with the negative pressure pipes 50. One end of the negative pressure channel 70 is communicated with the negative pressure pipe 50, and the other end of the negative pressure channel 70 is communicated with the first vacuum chamber 131 or the other end of the negative pressure channel 70 is communicated with the second vacuum chamber 141. Thus, the external negative pressure gas enters the negative pressure channel 70 through the negative pressure pipe 50 and is transported to the first vacuum chamber 131 or the second vacuum chamber 141 through the negative pressure channel 70. The negative pressure gas in the first vacuum chamber 131 or the second vacuum chamber 141 is transported to the electrode sheet through the adsorption holes 21 to adsorb the electrode sheet. In this embodiment, at least one negative pressure pipe 50 is provided in each negative pressure adsorption area 13 and each vacuum breaking area 14, and those skilled in the art can set the specific number of negative pressure pipes 50 in each negative pressure adsorption area 13 and each vacuum breaking area 14 according to actual situations.

[0055] Specifically, at least one positive pressure pipe 40 is provided in each vacuum breaking area 14, and at least one positive pressure channel 143 is provided in each vacuum breaking area 14. The positive pressure channel 143 is arranged corresponding to the positive pressure pipe 40. One end of the positive pressure channel 143 is communicated with the positive pressure pipe 40, and the other end of the positive pressure channel 143 is communicated with the positive pressure chamber 142. Thus, the external positive pressure gas enters the positive pressure channel 143 through the positive pressure pipe 40 and is transported to the positive pressure chamber 142 through the positive pressure channel 143. The positive pressure gas in the positive pressure chamber 142 is transported to the first separation hole 221 and the second separation hole 222 through the first air hole 1421 to separate the electrode sheet from the belt 20.

[0056] Specifically, the speed regulating assembly 60 can be disposed on the upper end surface of the pallet 10 or on the lower end surface of the pallet 10. Exemplarily, Figure 5 as shown, the speed regulating assembly 60 is disposed on the upper end surface of the pallet 10. As shown in Figure 8 the speed regulating assembly 60 is disposed on the lower end surface of the pallet 10. The speed regulating assembly 60 is communicated with the first air hole 1421. The speed regulating assembly 60 is used to adjust the flow rate of the positive pressure gas transported from the positive pressure chamber 142 to the first separation hole 221 and the second separation hole 222. Thus, the magnitude of the positive pressure applied to the electrode sheet can be adjusted. As an optional implementation manner, the speed regulating assembly 60 can be a speed regulating valve. In this embodiment, the number of speed regulating assemblies 60 can be set according to the number of vacuum breaking groups in each vacuum breaking area 14. Each vacuum breaking group is arranged in one-to-one correspondence with each speed regulating assembly 60. Exemplarily, one speed regulating assembly 60 corresponding to the vacuum breaking group is provided in the row area A, and six speed regulating assemblies 60 corresponding to the vacuum breaking group are provided in the falling area B to respectively adjust the air supply amount and the vacuum breaking time of each vacuum breaking group, so as to realize the independent adjustment of each vacuum breaking group.

[0057] As shown inFigures 1 to 3 As shown, the second aspect of this embodiment provides a pole piece transport device, including a first pole piece conveyor belt 1 and a second pole piece conveyor belt 2, the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 are both arranged along the first direction, and the projections of the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 along the third direction at least partially overlap, and the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 are both the pole piece conveyor belts described in the first aspect. Among them, the first pole piece conveyor belt 1 can be an inverted belt, the second pole piece conveyor belt 2 is a conveying belt, the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 have the same conveying direction, and the pole piece is conveyed from the first pole piece conveyor belt 1 to the second pole piece conveyor belt 2. Along the third direction, the first pole piece conveyor belt 1 is arranged above the second pole piece conveyor belt 2, the area of ​​the first pole piece conveyor belt 1 close to the second pole piece conveyor belt 2 is provided with a vacuum breaking zone 14, and the area of ​​the second pole piece conveyor belt 2 close to the vacuum breaking zone 14 is provided as a negative pressure adsorption zone 13.

[0058] The electrode sheet transfer device provided in the present embodiment is provided with a first electrode sheet conveyor belt and a second electrode sheet conveyor belt. The area of ​​the first electrode sheet conveyor belt close to the second electrode sheet conveyor belt is set as a vacuum breaking area. The vacuum breaking area can separate the electrode sheet from the first electrode sheet conveyor belt, and when the positive pressure applied to the electrode sheet surface by the vacuum breaking area is greater than the negative pressure applied to the electrode sheet surface, the pressure on the electrode sheet surface can be converted into positive pressure, which can make the electrode sheet detach from the first electrode sheet conveyor belt and be blown up, and the belts in the first electrode sheet conveyor belt and the second electrode sheet conveyor belt continuously move along the conveying direction, and the electrode sheet moves toward the second electrode sheet conveyor belt under the action of inertia. The area of ​​the second electrode sheet conveyor belt close to the vacuum breaking area is set as a negative pressure adsorption area, which can make the electrode sheet fall down and adsorb the electrode sheet. By switching between positive and negative pressures, not only can the electrode sheet be transferred from the first electrode sheet conveyor belt to the second electrode sheet conveyor belt more smoothly, but also the electrode sheet can be prevented from being skewed or offset during the transfer process, thereby reducing the influence of the transportation process on the production line utilization rate before the electrode sheet enters the lamination process, and effectively reducing the generation of defective electrode sheets.

[0059] On the basis of the above embodiment, as an optional implementation, the spacing between the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 along the third direction is adjustable. Specifically, a lifting drive member can be provided on the first pole piece conveyor belt 1 so that the first pole piece conveyor belt 1 can be moved along the third direction, so as to facilitate the cleaning and maintenance of the overlapping area between the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2. In this embodiment, the specific setting position of the lifting drive member is not further limited, and technicians in this field can set it according to actual conditions. The lifting drive member can be a cylinder. As an optional implementation, the spacing between the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 along the third direction can be adjusted to be greater than or equal to 50 mm.

[0060] On the basis of the above embodiments, as an optional implementation manner, the electrode sheet transfer device also includes an electrode sheet discharging area A, a sheet dropping area B and a sheet picking area C which are arranged in sequence along the first direction, and the pallets of the electrode sheet discharging area A, the sheet dropping area B and the sheet picking area C are all set as vacuum breaking areas 14, the pallet between the electrode sheet discharging area A and the sheet dropping area B is set as a negative pressure adsorption area 13, the pallet between the electrode dropping area B and the sheet picking area C is set as a negative pressure adsorption area 13, the electrode sheet discharging area A and the sheet dropping area B are set on the first electrode sheet conveyor belt 1, and the sheet picking area C is set on the second electrode sheet conveyor belt 2, wherein the sheet dropping area B is the vacuum breaking area 14 of the first electrode sheet conveyor belt 1 close to the second electrode sheet conveyor belt 2 as described above. Therefore, by setting the sheet discharging area A before the sheet dropping area B, bad electrodes can be pre-eliminated to prevent the bad electrodes from continuing to circulate. By setting the sheet dropping area B, it is convenient to transfer the electrodes from the first electrode sheet conveyor belt to the second electrode sheet conveyor belt, which is conducive to reducing the skew or deviation of the electrodes during the transportation process. By setting the sheet picking area C at the end of the second electrode sheet conveyor belt, it is convenient to transfer the electrodes from the second electrode sheet conveyor belt to the stacking platform. The first aspect of this embodiment describes the specific structures of the sheet discharging area A, the sheet dropping area B and the sheet picking area C, which will not be repeated here.

[0061] On the basis of the above embodiment, as an optional implementation, there is a guide slope 23 between the first electrode sheet conveyor belt 1 and the second electrode sheet conveyor belt 2, and the guide slope 23 is arranged between the falling area B and the negative pressure adsorption area 13 close to the first electrode sheet conveyor belt 1. The guide slope 23 can guide the electrode between the first electrode sheet conveyor belt 1 and the second electrode sheet conveyor belt 2, so as to facilitate the electrode on the first electrode sheet conveyor belt 1 to be conveyed to the second electrode sheet conveyor belt 2. As an optional implementation, the guide slope 23 is integrally connected with the belt 20 of the first electrode sheet conveyor belt 1, that is, the guide slope 23 can be a part of the belt 20 of the first electrode sheet conveyor belt 1. In this embodiment, the specific inclination angle of the guide slope 23 is not further described, and those skilled in the art can set it according to actual conditions.

[0062] On the basis of the above embodiment, as an optional implementation, it also includes a detection component 5, which is arranged on the first electrode conveyor belt 1, and the detection component 5 is arranged at the end of the row area A away from the drop area B, that is, the detection component is arranged before the row area A, and the electrode passes through the detection component 5, the row area A and the drop area B in sequence. The detection component 5 performs defect detection on the electrode. After the defective bad electrode reaches the row area A, the defective electrode is separated from the belt 20 and blown off by conveying positive pressure gas to the row area A, and the electrode without defects continues to be conveyed to the drop area B for transportation. Therefore, by performing defect detection on the electrode during the transportation process of the electrode, it is not only beneficial to improve the production efficiency of the battery cell, but also beneficial to reduce the production cost of the battery cell. As an optional implementation, the detection component 5 can be a detection camera (such as a CCD detection camera).

[0063] On the basis of the above embodiments, as an alternative embodiment, an iron removal assembly 3 is further included. The iron removal assembly 3 is provided on both the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2. One of the iron removal assemblies 3 can be arranged above the belt 20, and the other iron removal assembly 3 can be arranged below the pallet 10, so as to remove iron from the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2, and remove iron from the pole pieces during the conveying process of the pole pieces, avoiding bringing the broken metal chips on the pole pieces into the next process and affecting the quality of the battery cell. As an alternative embodiment, the iron removal assembly 3 in this embodiment removes iron by magnetic force, and the magnetic force can be greater than or equal to 12,000 gs. It should be noted that the iron removal assembly 3 provided in this embodiment mainly adsorbs magnetic impurities (such as broken metal chips, etc.) generated during the production process of the pole pieces. The surface of the pole piece is coated with a positive electrode active material or a negative electrode active material, and the positive electrode active material or the negative electrode active material is not magnetic and cannot be adsorbed by the iron removal assembly.

[0064] On the basis of the above embodiments, as an alternative embodiment, a dust removal assembly 4 is further included. The dust removal assembly 4 is provided on both the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2. The dust removal assembly 4 can be in contact with the belt 20 of the first pole piece conveyor belt 1, or the dust removal assembly 4 can be in contact with the belt 2 of the second pole piece conveyor belt 2. The dust removal assembly 4 includes a brush 41, and the brush 41 can rotate around its own axis and contact the surface of the belt during the movement of the belt 20 to perform rolling dust removal on the belt 20, so as to remove the dust on the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 and avoid blocking the adsorption holes and separation holes. As an alternative embodiment, the brush 41 is detachably connected to the dust removal assembly 4 for easy replacement.

[0065] On the basis of the above embodiments, as an alternative embodiment, the driving members 30 in the first pole piece conveyor belt 1 and the second pole piece conveyor belt 2 have the same structure. The driving member 30 includes a motor 31 and a belt driving traction roller 32. The belt driving traction roller 32 is in contact with the belt 20 to drive the belt 20 to move along the transportation direction. The belt driving traction roller 32 adopts a spindle-shaped roller, and the spindle-shaped roller can provide stable traction force to avoid the pole piece from running off track.

[0066] In this embodiment, the electrode sheet first enters the first electrode sheet conveyor belt 1. The electrode sheet first passes through the detection component, and the detection component detects defects of the electrode sheet. After the defective electrode sheets reach the discharge area A, by conveying positive pressure gas to the discharge area A, the defective electrode sheets are separated from the belt 20 and blown off, so as to be separated from the electrode sheet transfer device. The non-defective electrode sheets continue to be conveyed to the dropping area B. The dropping area B separates the electrode sheet from the belt 20 of the first electrode sheet conveyor belt 1, causes the electrode sheet to be separated from the belt 20 of the first electrode sheet conveyor belt 1 and blown up. The electrode sheet will move towards the second electrode sheet conveyor belt 2 under the action of inertia. At the same time, the negative pressure adsorption area on the second electrode sheet conveyor belt 2 can make the electrode sheet fall down and adsorb the electrode sheet, so as to transfer the electrode sheet to the second electrode sheet conveyor belt 2. The electrode sheet continues to be conveyed until it reaches the picking area C. By conveying positive pressure gas to the picking area C, the electrode sheet is separated from the belt 20 of the second electrode sheet conveyor belt 2, so as to transfer the electrode sheet to the stacking table handling place.

[0067] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A pole piece conveyor belt, characterized in that: include: A support plate, comprising a negative pressure adsorption area and a vacuum breaking area alternately arranged along a first direction, wherein the negative pressure adsorption area and the vacuum breaking area are separately arranged; the negative pressure adsorption area comprises a plurality of first vacuum chambers arranged at intervals along a second direction and connected to each other, and the vacuum breaking area comprises second vacuum chambers and positive pressure chambers alternately arranged along the second direction, wherein a plurality of the positive pressure chambers are connected to each other, and a plurality of the second vacuum chambers are connected to each other; A belt, the belt is arranged on the support plate, the belt comprises a plurality of groups of adsorption holes and a plurality of groups of separation holes, each group of the adsorption holes and each group of the separation holes are alternately arranged along the second direction, each group of the adsorption holes and each group of the separation holes are extended along the first direction, each group of the adsorption holes is respectively connected with the first vacuum chamber and the second vacuum chamber, the belt adsorbs the pole piece through the adsorption holes, each group of the separation holes is connected with the positive pressure chamber, and the belt is separated from the pole piece through the separation holes; A driving member, the driving member is connected to the belt, and the driving member is used to drive the belt to move relative to the supporting plate along a first direction, so that the pole piece adsorbed on the belt passes through a negative pressure adsorption area and a vacuum breaking area; The first direction and the second direction are arranged perpendicularly.

2. The pole piece conveyor belt according to claim 1, characterized in that: The number of the first vacuum chambers in the negative pressure adsorption area is the same as the number of the second vacuum chambers in the vacuum breaking area, the first vacuum chambers and the second vacuum chambers are integrally connected, and the first vacuum chambers and the second vacuum chambers are separated by a sealing block.

3. The pole piece conveyor belt according to claim 1, characterized in that: The vacuum breaking area includes at least one row of vacuum breaking groups arranged along the first direction, each of the vacuum breaking groups is independently arranged, and the vacuum breaking group includes second vacuum chambers and positive pressure chambers alternately arranged along the second direction, each of the positive pressure chambers is provided with at least one first air hole, and the first air hole is used to transport the positive pressure gas in the positive pressure chamber to the pole piece through the separation hole, so as to separate the pole piece and the belt.

4. The pole piece conveyor belt according to claim 1, characterized in that: Each group of separation holes includes a first separation hole and a second separation hole. Along the first direction, a plurality of the first separation holes are evenly arranged on the belt, and between any two adjacent first separation holes there is at least one second separation hole arranged along the second direction.

5. The pole piece conveyor belt according to claim 4, characterized in that: The first separation hole is waist-shaped or elliptical, the second separation hole is circular, the projection area of ​​the first separation hole along the third direction is larger than the projection area of ​​the second separation hole along the third direction, the projection area of ​​the adsorption hole along the third direction is larger than the projection area of ​​the second separation hole along the third direction, and the third direction is perpendicular to the plane formed by the first direction and the second direction.

6. The pole piece conveyor belt according to claim 1, characterized in that: Each group of the adsorption holes includes a plurality of adsorption holes uniformly arranged on the belt along a first direction, and the negative pressure gas in the first vacuum chamber is transported to the pole piece through the adsorption holes, and the negative pressure gas in the second vacuum chamber is transported to the pole piece through the adsorption holes.

7. The pole piece conveyor belt according to claim 1, characterized in that: It also includes a positive pressure pipeline, a negative pressure pipeline and a speed regulating component, the negative pressure pipeline is arranged on the support plate along the second direction, the negative pressure adsorption area is provided with at least one negative pressure pipeline connected to the first vacuum chamber, the vacuum breaking area is provided with at least one negative pressure pipeline connected to the second vacuum chamber and at least one positive pressure pipeline connected to the positive pressure chamber; the speed regulating component is connected to the positive pressure chamber, and the speed regulating component is used to adjust the flow rate of the positive pressure gas delivered from the positive pressure chamber to the separation hole.

8. A pole piece transport device, characterized in that: It comprises a first pole piece conveyor belt and a second pole piece conveyor belt, wherein the first pole piece conveyor belt and the second pole piece conveyor belt are both arranged along a first direction, and the projections of the first pole piece conveyor belt and the second pole piece conveyor belt along a third direction at least partially overlap, a vacuum breaking zone is arranged in an area of ​​the first pole piece conveyor belt close to the second pole piece conveyor belt, and a negative pressure adsorption zone is arranged in an area of ​​the second pole piece conveyor belt close to the vacuum breaking zone, and the first pole piece conveyor belt and the second pole piece conveyor belt are both the pole piece conveyor belts according to any one of claims 1 to 7.

9. The pole piece transport device according to claim 8, characterized in that: The vacuum breaking area of ​​the first pole piece conveyor belt close to the second pole piece conveyor belt is a pole piece dropping area; It also includes a sheet discharging area and a sheet picking area, the sheet discharging area, the sheet dropping area and the sheet picking area are arranged in sequence along the first direction, the support plates of the sheet discharging area and the sheet picking area are both set as the vacuum breaking area, the support plate between the sheet discharging area and the sheet dropping area is set as the negative pressure adsorption area, the support plate between the sheet dropping area and the adsorption area is set as the negative pressure adsorption area, the sheet discharging area is set on the first electrode sheet conveyor belt, and the sheet picking area is set on the second electrode sheet conveyor belt.

10. The pole piece transport device according to claim 9, characterized in that: It also includes a detection component, which is arranged on the first electrode sheet conveyor belt, and is arranged at one end of the electrode row area away from the electrode drop area, and is used to perform defect detection on the electrode sheet; It also includes an iron removal component, which is provided on both the first pole piece conveyor belt and the second pole piece conveyor belt, and is used to remove iron from the first pole piece conveyor belt and the second pole piece conveyor belt; It also includes a dust removal component, which is provided on the first pole piece conveyor belt and the second pole piece conveyor belt, and is used to remove dust from the first pole piece conveyor belt and the second pole piece conveyor belt.

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