CN111430814B - Lamination method and lamination device - Google Patents
Lamination method and lamination device Download PDFInfo
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- CN111430814B CN111430814B CN202010176936.5A CN202010176936A CN111430814B CN 111430814 B CN111430814 B CN 111430814B CN 202010176936 A CN202010176936 A CN 202010176936A CN 111430814 B CN111430814 B CN 111430814B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a lamination method and a lamination device, wherein a lamination unit is transmitted to the vicinity of a lamination table by collecting the position of a first pole piece of one lamination unit, the lamination unit is adjusted and conveyed to a lamination table preset lamination area, the other lamination unit is adjusted and conveyed to the lamination unit which is already stacked in the lamination table preset lamination area, the first pole pieces of the two lamination units are kept aligned, and the lamination unit is subjected to hot pressing treatment to complete the stacking of an electric core. The technical problems that the alignment requirement of lamination units cannot be guaranteed and the stacking yield of the battery cells is low in the prior art are solved.
Description
Technical Field
The application relates to the technical field of battery cell stacking, in particular to a lamination method and a lamination device.
Background
For lithium battery applications, it is often necessary to assemble the cells into a battery module. In the process of assembling the battery cells into the battery module, a plurality of battery cells need to be stacked.
When lamination is carried out in a thermal compounding mode, pole pieces in each lamination unit are required to be aligned, so that the alignment degree of the pole pieces in the battery cell reaches the set technical requirement. In the prior art, a manual alignment mode is adopted to ensure alignment in each lamination unit. However, the thermal lamination method in the prior art cannot ensure the alignment requirement of lamination units, so that the stacking yield of the battery cells is lower.
Disclosure of Invention
The technical problem that the stacking yield of the battery cells is low because the alignment requirement of the lamination units cannot be guaranteed in the prior art is solved.
In one aspect, an embodiment of the present application provides a lamination method, where an electrical core pole piece includes a plurality of lamination units, including: transmitting the lamination unit to the vicinity of a lamination table, adjusting the lamination unit to a correct posture, and carrying the lamination unit to a preset lamination area of the lamination table; adjusting the other lamination unit to a correct posture, carrying the lamination unit to the lamination unit which is already stacked in a preset lamination area of the lamination table, and keeping the first pole pieces of the two lamination units aligned; and carrying out hot pressing treatment on the aligned lamination units to complete the stacking of the battery cells.
Further, the lamination unit is an upper lamination unit or a middle lamination unit or a lower lamination unit, and the first pole piece is an anode of the upper lamination unit or the middle lamination unit or the lower lamination unit.
Further, transferring the lamination unit to the vicinity of the lamination stage, adjusting the lamination unit to a correct posture, and carrying to a lamination stage preset lamination area includes: the positive poles of the upper lamination unit, the middle lamination unit and the lower lamination unit are upwards transmitted to the vicinity of a lamination table; carrying the middle lamination unit to a preset lamination area of a lamination table; adjusting the other lamination unit to the correct posture, carrying the lamination unit to the lamination unit stacked in the preset lamination area of the lamination table, and keeping the positive poles of the two lamination units aligned comprises: the lower lamination unit is conveyed to the middle lamination unit, and the positive electrode of the lower lamination unit is aligned with the positive electrode of the middle lamination unit; vertically rotating the middle lamination unit and the lower lamination unit by 180 degrees to stack in a preset lamination area of a lamination table, and adjusting the middle lamination unit to a state of being arranged above the lower lamination unit; carrying out hot pressing treatment on the aligned lamination units, and before stacking the battery cells, further comprising: carrying the upper lamination unit onto the middle lamination unit, and keeping the positive electrode of the upper lamination unit aligned with the positive electrode of the middle lamination unit; performing hot pressing treatment on the aligned lamination units, and completing stacking of the battery cells comprises: and carrying out hot pressing treatment on the upper lamination unit, the middle lamination unit and the lower lamination unit to complete stacking of the battery cells.
Further, the step of transporting the middle lamination unit to a lamination station preset lamination area includes: and (3) collecting the positive electrode position of the middle lamination unit, calculating the error of the preset lamination area of the positive electrode of the middle lamination unit and the lamination table according to the positive electrode position of the middle lamination unit, and adjusting the carrying middle lamination unit to the preset lamination area according to the error.
Further, the step of transporting the lower lamination unit onto the middle lamination unit, the step of maintaining the positive electrode of the lower lamination unit aligned with the positive electrode of the middle lamination unit, comprises: and collecting the positive electrode position of the lower lamination unit, calculating the error between the positive electrode of the lower lamination unit and the positive electrode of the middle lamination unit stacked in the preset lamination area according to the positive electrode position of the lower lamination unit, and adjusting and carrying the lower lamination unit to the middle lamination unit according to the error, so as to keep the positive electrode of the lower lamination unit aligned with the positive electrode of the middle lamination unit.
Further, the step of vertically rotating the middle lamination unit and the lower lamination unit by 180 ° to stack in a lamination table preset lamination area, and adjusting to a state in which the middle lamination unit is disposed above the lower lamination unit includes: and vertically rotating the middle lamination unit and the lower lamination unit by 180 degrees to stack in a preset lamination area of the lamination table, adjusting to a state that the middle lamination unit is arranged above the lower lamination unit, and calculating the position difference before and after the positive electrode of the middle lamination unit rotates.
Further, the step of transporting the upper lamination unit to the middle lamination unit, and maintaining the positive electrode of the upper lamination unit aligned with the positive electrode of the middle lamination unit includes: and collecting the positive electrode position of the upper lamination unit, calculating the position error of a preset lamination area of the positive electrode of the upper lamination unit and the lamination table according to the positive electrode position of the upper lamination unit, and adjusting and carrying the upper lamination unit to the middle lamination unit according to the position difference before and after the positive electrodes of the middle lamination unit and the lower lamination unit rotate and the position error, so as to keep the positive electrodes of the upper lamination unit aligned with the positive electrodes of the middle lamination unit.
Further, the upper lamination unit is positive pole, diaphragm, negative pole, diaphragm from top to bottom in proper order, and well lamination unit is positive pole, diaphragm, negative pole, diaphragm, positive pole from top to bottom in proper order, and lower lamination unit is diaphragm, negative pole, diaphragm, positive pole from top to bottom in proper order.
Further, the step of transferring the upper lamination unit, the middle lamination unit, and the lower lamination unit positive electrode upward to the vicinity of the lamination stage includes: and the positive poles of the upper lamination unit, the middle lamination unit and the lower lamination unit are upwards transmitted to the vicinity of the lamination table through one vacuum transmission device or the positive poles of the upper lamination unit, the middle lamination unit and the lower lamination unit are upwards transmitted to the vicinity of the lamination table through three vacuum transmission devices respectively.
Further, adjusting the in-process lamination unit to the preset lamination area according to the error comprises moving the in-process lamination unit in the X-axis direction and/or moving the in-process lamination unit in the Y-axis direction and/or rotating the in-process lamination unit around the Z-axis direction according to the error; and carrying the lower lamination unit to the middle lamination unit according to the error adjustment comprises moving the lower lamination unit in the X-axis direction and/or moving in the Y-axis direction and/or rotating around the Z-axis direction according to the error adjustment; adjusting the handling of the upper lamination unit to the middle lamination unit includes adjusting the upper lamination unit to move in the X-axis direction and/or to move in the Y-axis direction and/or to rotate about the Z-axis direction.
There is also provided a lamination device comprising: the lamination table is provided with a lamination area in advance, one side of the lamination table is provided with a rotating assembly, a first collecting device and a second collecting device are respectively arranged above and below the lamination table, and the first collecting device and the second collecting device are used for collecting the positive electrode position of the lamination unit; the vacuum transmission device adsorbs the unit to be laminated for transmission, and the vacuum transmission device transmits the unit to be laminated to the lamination table; and the carrying device is used for adjusting and carrying the unit to be laminated onto the lamination table from the vacuum transmission device.
Further, rotating assembly includes the fixed arm, go up clamping jaw, lower clamping jaw and motor, the fixed arm is fixed in one side of lamination platform, the motor sets up in the fixed arm one side of keeping away from the lamination platform, go up clamping jaw and lower clamping jaw setting in the fixed arm one side of keeping close to the lamination platform, go up clamping jaw and lower clamping jaw and carry out rotary motion through motor drive, rotating assembly still includes first driving piece and second driving piece, first driving piece drive goes up clamping jaw and lower clamping jaw and opens and shuts the action or remove in vertical direction, second driving piece drive goes up clamping jaw and lower clamping jaw and moves along the horizontal direction and be close to or keep away from the lamination platform. Further, the handling device includes: lifting unit, sucking disc, X axle component of rectifying, Y axle component of rectifying and angle component of rectifying are connected respectively to lifting unit, X axle component of rectifying, Y axle component of rectifying, angle component of rectifying and sucking disc, and the sucking disc is used for adsorbing the lamination unit of waiting, and lifting unit drive sucking disc reciprocates, and X axle component of rectifying drives sucking disc and removes in X axle direction, and Y axle component of rectifying drives sucking disc and removes in Y axle direction, and angle component of rectifying drives sucking disc to coil Z axle direction rotation.
According to the lamination method, the lamination units are transmitted to the vicinity of the lamination table, the lamination units are adjusted and conveyed to the lamination table preset lamination area, the other lamination unit is adjusted and conveyed to the lamination units stacked in the lamination table preset lamination area, the first pole pieces of the two lamination units are kept aligned, the lamination units are subjected to hot pressing treatment, and the stacking of the battery cells is completed. The technical problems that the alignment requirement of lamination units cannot be guaranteed and the stacking yield of the battery cells is low in the prior art are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a first embodiment of the lamination method of the present application;
FIG. 2 is a schematic flow chart of a second embodiment of the lamination method of the present application;
FIG. 3 is a schematic view of the sub-flow of step S02 in FIG. 2;
FIG. 4 is a schematic view of the sub-process of step S03 in FIG. 2;
FIG. 5 is a schematic view of the sub-process of step S05 in FIG. 2;
fig. 6 is a schematic structural view of a cell of the lamination method of the present application;
FIG. 7 is a block schematic diagram of the lamination apparatus of the present application;
FIG. 8 is a schematic view of the lamination station of the lamination apparatus of the present application;
FIG. 9 is a schematic view of the rotating assembly of the lamination apparatus of the present application;
fig. 10 is a schematic structural view of a handling device of the lamination device of the present application.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present application, but do not limit the scope of the present application. Likewise, the following examples are only some, but not all, of the examples of the present application, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present application.
The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. The terms "comprising" and "having" and any variations thereof in embodiments of the present application are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, a flowchart of a first embodiment of the lamination method of the present application is shown.
Step S1, transmitting the lamination unit to the vicinity of a lamination table, adjusting the lamination unit to a correct posture, and carrying the lamination unit to a preset lamination area of the lamination table.
The battery cell pole piece comprises a plurality of lamination units, the lamination units are specifically divided according to specific requirements of the lithium battery, and each lamination unit comprises: positive electrode, separator, negative electrode and separator. Wherein the combination of different arrangements of the positive electrode, separator, negative electrode and separator determines different properties of each lamination unit. In this embodiment, only stacking of two lamination units is involved, and first a lamination unit is carried to the vicinity of a preset area of the lamination table. Before carrying the lamination unit to the vicinity of a preset lamination area of a lamination table, acquiring the position of a first pole piece of the lamination unit, calculating the error of the lamination unit and the preset lamination area of the lamination table according to the current position of the first pole piece of the lamination unit, and adjusting, wherein the specific adjustment comprises driving the lamination unit to move in the X-axis direction and/or move in the Y-axis direction and/or rotate around the Z-axis direction through a mechanical arm or a sucker, wherein the rotation comprises rotating 180 degrees around the Z-axis direction, and carrying the lamination unit to the preset lamination area after the adjustment is completed.
And S2, adjusting the other lamination unit to the correct posture, carrying the lamination unit to the lamination unit which is already stacked in the preset lamination area of the lamination table, and keeping the first pole pieces of the two lamination units aligned.
And acquiring the first pole piece position of the other lamination unit, acquiring the position of the first pole piece stacked in the lamination area again, adjusting the other lamination unit according to the position of the first pole piece stacked in the lamination area and stacking the other lamination unit on the first lamination unit, wherein the specific adjustment comprises driving the lamination unit to move in the X-axis direction and/or the Y-axis direction and/or rotate around the Z-axis direction through a mechanical arm or a sucker, wherein the rotation comprises rotating 180 degrees around the Z-axis direction, carrying the other lamination unit above the first lamination unit after the adjustment is finished, and keeping the first lamination unit aligned with the first pole piece of the other lamination unit. The first pole piece in this embodiment may be the positive pole of the lamination unit, in other embodiments may be the negative pole of the lamination unit, etc.
In this embodiment, a specific process of aligning lamination of two lamination units is disclosed, and in other embodiments, any plurality of lamination units may be stacked in alignment.
And S3, carrying out hot pressing treatment on the aligned lamination units to finish stacking of the battery cells.
The hot pressing treatment is to treat the aligned lamination units at high temperature and high pressure and press for a certain time to align and fix the aligned lamination units firmly.
Referring to fig. 2, a flow chart of a second embodiment of the lamination method of the present application is shown. Fig. 6 is a schematic structural diagram of a battery cell according to the lamination method of the present application.
And S01, transmitting the positive poles of the upper lamination unit, the middle lamination unit and the lower lamination unit upwards to the vicinity of the lamination table.
In this embodiment, the lamination units include an upper lamination unit 5, a middle lamination unit 6 and a lower lamination unit 7, wherein the upper lamination unit 5 sequentially includes a positive electrode 51, a diaphragm 53, a negative electrode 52 and a diaphragm 53 from top to bottom, the middle lamination unit 6 sequentially includes a positive electrode 61, a diaphragm 63, a negative electrode 62, a diaphragm 63 and a positive electrode 61 from top to bottom, and the lower lamination unit 7 sequentially includes a diaphragm 73, a negative electrode 72, a diaphragm 73 and a positive electrode 71 from top to bottom. In this embodiment, the upper lamination unit 5, the middle lamination unit 6 and the lower lamination unit 7 may be transported to the vicinity of the lamination stage by the same positive electrode of the vacuum transport device, or the upper lamination unit 5, the middle lamination unit 6 and the lower lamination unit 7 may be transported to the vicinity of the lamination stage by the positive electrode of one vacuum transport device, respectively. In this embodiment, the positive electrodes of the upper lamination unit 5, the middle lamination unit 6 and the lower lamination unit 7 are transmitted to the vicinity of the lamination table, so as to facilitate the collection device to collect the positive electrode positions of the lamination units.
Step S02, conveying the middle lamination unit to a preset lamination area of a lamination table.
In this embodiment, since the middle lamination unit 6 has a vertically symmetrical structure, and the positive electrodes 61 are provided on both the upper and lower surfaces of the middle lamination unit 6, the middle lamination unit 6 is stacked in the lamination area preset in the lamination table. Please refer to fig. 3, which is a schematic diagram illustrating a sub-process of step S02 in fig. 2.
And step S021, collecting the positive electrode position of the middle lamination unit.
Since the upper and lower sides of the middle lamination unit 6 are both provided with the positive electrode 61, and the middle lamination unit 6 is also conveyed upwards to the vicinity of the lamination table by the positive electrode 61, the position of the positive electrode 61 of the middle lamination unit 6 is first collected by the collecting device on the vacuum conveying device.
Step S022, calculating the error of the preset lamination area of the positive electrode of the middle lamination unit and the lamination table according to the positive electrode position of the middle lamination unit.
After the position of the positive electrode 61 of the middle lamination unit 6 is collected, a central control system of the lamination table calculates errors of the position of the positive electrode 61 of the middle lamination unit 6 and a preset lamination area of the lamination table, wherein the errors comprise errors of the middle lamination unit 6 in the X-axis and Y-axis directions in the horizontal direction and also comprise angle errors of the middle lamination unit 6 in the Z-axis direction.
Step S023, and moving the lamination unit in the X-axis direction and/or the Y-axis direction and/or rotating around the Z-axis direction according to the error adjustment and then carrying the lamination unit to the preset lamination area.
Step S03, conveying the lower lamination unit to the middle lamination unit stacked in the preset lamination area, collecting the positive electrode position of the middle lamination unit stacked in the preset lamination area, and keeping the positive electrode of the lower lamination unit aligned with the positive electrode of the middle lamination unit stacked in the preset lamination area.
In the present embodiment, the middle lamination unit 6 is provided in only one piece and is provided in the middle of the battery cell, and it is now necessary to arrange the positive electrode 71 of the lower lamination unit 7 and the positive electrode 51 of the upper lamination unit 5 in alignment with the positive electrode 61 of the middle lamination unit 6. Please refer to fig. 4, which is a schematic diagram illustrating a sub-process of step S03 in fig. 2.
Step S031, collecting the positive electrode position of the lower lamination unit.
In step S01, the lower lamination unit 7 is conveyed by the positive electrode 71 up to the vicinity of the lamination stage, but since the lower lamination unit 7 is at the lower part in the cell, and the positive electrode 71 of the lower lamination unit 7 at the lower part is below the lower lamination unit 7. The position of the positive electrode 71 is not easily collected, so that the position of the positive electrode 71 of the lower lamination unit 7 needs to be collected when the positive electrode 71 of the lower lamination unit 7 is conveyed upward to the lamination table.
Step S032, calculating the error between the positive electrode of the lower lamination unit and the positive electrode of the middle lamination unit stacked in the preset lamination area according to the positive electrode position of the lower lamination unit.
After the position of the positive electrode 71 of the lower lamination unit 7 is collected, the central control system of the lamination table calculates errors of the position of the positive electrode 71 of the lower lamination unit 7 and the positive electrode 61 of the middle lamination unit 6, wherein the errors comprise errors of the lower lamination unit 7 in the X-axis and Y-axis directions in the horizontal direction and also comprise angle errors of the lower lamination unit 7 in the Z-axis direction.
And S033, adjusting the lower lamination unit to move in the X-axis direction and/or move in the Y-axis direction and/or rotate around the Z-axis direction according to the error, and then transporting the lower lamination unit to the middle lamination unit, and keeping the positive electrode of the lower lamination unit aligned with the positive electrode of the middle lamination unit.
According to the error in step S032, the lower lamination unit 7 is adjusted to move in the X-axis direction and/or move in the Y-axis direction and/or rotate around the Z-axis direction according to the error, so that the positive electrode 71 of the lower lamination unit 7 is aligned with the positive electrode 61 of the middle lamination unit 6, and then carried onto the middle lamination unit 6. In the present embodiment, only one lower lamination unit 7 is stacked above the middle lamination unit 6, and in other embodiments, a plurality of lower lamination units 7 may be stacked above the middle lamination unit 6. When stacking a plurality of lower lamination units 7 on the middle lamination unit 6, stacking the first lower lamination unit 7 as described above, and then stacking the subsequent lower lamination units 7, it is necessary to calculate an error between the positive electrode 71 of the subsequent lower lamination unit 7 and the positive electrode 71 of the lower lamination unit 7 that has been previously stacked, and adjust the subsequent lower lamination unit 7 to be stacked on the lower lamination unit 7 that has been already stacked according to the error.
And S04, vertically rotating the middle lamination unit and the lower lamination unit by 180 degrees to stack in a preset lamination area of a lamination table, and adjusting to a state that the middle lamination unit is arranged above the lower lamination unit.
The middle lamination unit 6 and the lower lamination unit 7 are vertically rotated 180 ° to be stacked in a lamination table preset lamination area, and adjusted to a state in which the middle lamination unit 6 is disposed above the lower lamination unit 7, and a position difference between before and after the rotation of the positive electrode 61 of the middle lamination unit 6 is calculated. Since the positive electrode 61 of the middle lamination unit 6 and the positive electrode 71 of the lower lamination unit 7 have been aligned before, the positive electrode 61 of the middle lamination unit 6 and the positive electrode 71 of the lower lamination unit 7 can be regarded as one positive electrode.
Step S05, the upper lamination unit is carried onto the middle lamination unit, and the positive electrode of the upper lamination unit is aligned with the positive electrode of the middle lamination unit.
Since the middle lamination unit 6 is below the lower lamination unit 7 before the rotation of the lower lamination unit 7 and the middle lamination unit 6, but after the rotation, the middle lamination unit 6 is above the lower lamination unit 7, the middle lamination unit 6 is in the correct position for the whole cell lamination unit, so that it is necessary to continue stacking the upper lamination unit 5 on the middle lamination unit 6. Please refer to fig. 5, which is a schematic diagram illustrating a sub-process of step S05 in fig. 2.
And step S051, collecting the positive electrode position of the upper lamination unit.
Step S052, calculating the position error of the preset lamination area of the positive electrode of the upper lamination unit and the lamination table according to the positive electrode position of the upper lamination unit.
In step S051, the position of the positive electrode 51 of the upper lamination unit 5 is acquired, and the position error between the positive electrode 51 of the upper lamination unit 5 and the preset area of the lamination table is calculated according to the position of the positive electrode 51 of the upper lamination unit 5, but this error cannot determine the position difference between the upper lamination unit 5 and other lamination units.
And S053, adjusting the upper lamination unit to move in the X-axis direction and/or move in the Y-axis direction and/or rotate around the Z-axis direction according to the position difference before and after the positive electrode of the middle lamination unit rotates and the position error, and then transporting the upper lamination unit to the middle lamination unit, so as to keep the positive electrode of the upper lamination unit aligned with the positive electrode of the middle lamination unit.
The basis for the alignment judgment of the upper lamination unit 5 and the middle lamination unit 6 is the position difference before and after the rotation of the positive electrode 61 of the middle lamination unit 6 and the position error of the upper lamination unit 5 and the preset lamination area of the lamination table, and the positive electrode 51 of the upper lamination unit 5 is aligned with the positive electrode 61 of the middle lamination unit 6 according to the two difference values, and since the positive electrode 71 of the lower lamination unit 7 is aligned with the positive electrode 61 of the middle lamination unit 6 before, only the positive electrode 51 of the upper lamination unit 5 and the positive electrode 61 of the middle lamination unit 6 need to be aligned in the embodiment. In the present embodiment, only one upper lamination unit 5 is stacked above the middle lamination unit 6, and in other embodiments, a plurality of upper lamination units 5 may be stacked above the middle lamination unit 6. When stacking a plurality of upper lamination units 5 on the middle lamination unit 6, stacking a first upper lamination unit 5 as described above, and then stacking a subsequent upper lamination unit 5, it is necessary to calculate an error between the positive electrode 51 of the subsequent upper lamination unit 5 and the positive electrode 51 of the upper lamination unit 5 that has been previously stacked, and stack the subsequent upper lamination unit 5 on the upper lamination unit 5 that has been already stacked according to the error.
And S06, performing hot pressing treatment on the upper lamination unit, the middle lamination unit and the lower lamination unit to complete the stacking of the battery cells.
And performing hot pressing treatment on the upper lamination unit 5, the middle lamination unit 6 and the lower lamination unit 7, and selecting to press for a certain time at high temperature and high pressure, so that the upper lamination unit 5, the middle lamination unit 6 and the lower lamination unit 7 are firmly stacked, and the aligned correct posture of the positive electrode is kept.
The application keeps the positive poles 61 of the middle lamination unit 6 aligned with the positive poles 71 of the lower lamination unit 7 by stacking the middle lamination unit 6 on a lamination table preset lamination area and then stacking the lower lamination unit 7 on the middle lamination unit 6, then rotating the middle lamination unit 6 and the lower lamination unit 7 180 degrees to form the middle lamination unit 6 on the upper surface, and then stacking the upper lamination unit 5 on the middle lamination unit 6 to keep the positive poles of the lamination units aligned. The technical problems that the alignment requirement of lamination units cannot be guaranteed and the stacking yield of the battery cells is low in the prior art are solved.
The present application also provides a lamination device, and please refer to fig. 7, which is a schematic block diagram of the lamination device of the present application. Referring to fig. 8, a schematic structural diagram of a lamination table of the lamination device of the present application is shown.
The lamination device 1 includes: lamination station 2, vacuum transfer device 4 and handling device 3. Lamination area is preset to lamination platform 2 top, and lamination platform 2 one side is provided with rotating assembly, and lamination platform 2 top and below are provided with first collection system 24 and second collection system 25 respectively, and first collection system 24 and second collection system 25 are used for gathering the positive pole position of lamination unit. In another embodiment, the first collecting device 24 and the second collecting device 25 are used for detecting the accuracy of the pole pieces of the stacked battery cells, and if the pole pieces of the stacked battery cells are detected to be misaligned, the battery cells are disassembled for re-stacking. The vacuum transmission device 4 adsorbs the unit to be laminated, and the vacuum transmission device 4 transmits the unit to be laminated to the vicinity of the lamination stage 2. The handling device 3 carries the units to be laminated from the vacuum transfer device 4 onto the lamination table 2.
Lamination table 2 still includes support 22, and support 22 supports lamination table 2, and support 22 below is provided with drive assembly 23, and drive assembly 23 can go up and down the height of lamination table 2, and lamination table 2 still includes pressfitting piece 26 for the spacing pressfitting of lamination unit.
Fig. 9 is a schematic structural view of a rotating assembly of the lamination device of the present application.
The rotating assembly comprises a stationary arm 21, an upper jaw 28, a lower jaw 29 and a motor 27. The fixed arm 21 is fixed on one side of the lamination table 2, which in this embodiment is provided with the fixed arm 21, the motor 27 is arranged on the side of the fixed arm 21 remote from the lamination table, the upper jaw 28 and the lower jaw 29 are arranged on the side of the fixed arm 21 close to the lamination table, and the upper jaw 28 and the lower jaw 29 are driven to rotate around the fixed arm 21 by the motor 27. Lamination units stacked on a lamination table may be flipped 180 ° by a rotating assembly. The rotating assembly further comprises a first driving member driving the upper jaw 28 and the lower jaw 29 to perform a folding action to clamp or unclamp the lamination unit and driving the upper jaw 28 and the lower jaw 29 to move along the fixed arm 21 in a vertical direction, and a second driving member driving the upper jaw 28 and the lower jaw 29 to move closer to or farther away from the lamination table in a horizontal direction, in which case the lamination unit stacked on the lamination table may be turned 180 ° by the rotating assembly while the second driving member driving the upper jaw 28 and the lower jaw 29 away from the lamination table, in which case the second driving member may not drive the upper jaw 28 and the lower jaw 29, the driving member 23 may lower the height of the lamination table 2, and then the lamination unit stacked on the lamination table may be turned 180 ° by the rotating assembly.
Fig. 10 is a schematic structural diagram of a handling device of the lamination device according to the present application.
The carrying device 3 includes: lifting assembly 34, sucking disc 30, X axle rectifying assembly 33, Y axle rectifying assembly 31 and angle rectifying assembly 32. The lifting assembly 34, the X-axis deviation rectifying assembly 33, the Y-axis deviation rectifying assembly 31, the angle deviation rectifying assembly 32 and the sucker 30 are respectively connected, and the sucker 30 is used for adsorbing a unit to be laminated. Lifting assembly 34 drives sucking disc 30 reciprocates and adsorbs lamination unit, and X axle rectifying assembly 33 drives sucking disc 30 to remove in X axial direction, and Y axle rectifying assembly 31 drives sucking disc 30 to remove in Y axial direction, and angle rectifying assembly 32 drives sucking disc 30 to rotate around Z axial direction. The handling device 3 can adjust the positions of the lamination units through the X-axis deviation correcting component 33, the Y-axis deviation correcting component 31 and the angle deviation correcting component 32, so that the positive poles of the lamination units are aligned and stacked on the lamination table.
The lamination device comprises a lamination table, wherein a first acquisition device and a second acquisition device which can acquire the positive electrode position of a unit to be laminated are respectively arranged above and below the lamination table. The rotating assembly is arranged on one side of the lamination table and can rotate the lamination unit. And the vacuum transmission device transmits the units to be laminated to the vicinity of the lamination table, and the positive electrode positions of the units to be laminated are adjusted to be aligned through the carrying device. The technical problems that the alignment requirement of the lamination unit cannot be guaranteed and how to detect the alignment of the stacked battery cells in the prior art are solved, and the yield of battery cell stacking is greatly improved.
The foregoing description is only a partial embodiment of the present application, and is not intended to limit the scope of the present application, and all equivalent devices or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.
Claims (4)
1. The battery cell comprises a plurality of lamination units, and is characterized in that the lamination units are upper lamination units, middle lamination units or lower lamination units, the upper lamination units are sequentially positive electrodes, diaphragms, negative electrodes and diaphragms from top to bottom, the middle lamination units are sequentially positive electrodes, diaphragms, negative electrodes, diaphragms and positive electrodes from top to bottom, and the lower lamination units are sequentially diaphragms, negative electrodes, diaphragms and positive electrodes from top to bottom; the lamination method comprises the following steps:
the first pole pieces of the upper lamination unit, the middle lamination unit and the lower lamination unit are upwards transmitted to the vicinity of a lamination table; the first pole piece of the lamination unit is a negative pole or a positive pole of the lamination unit;
collecting a first pole piece position of the middle lamination unit, calculating an error between the first pole piece of the middle lamination unit and a preset lamination area of the lamination table according to the first pole piece position of the middle lamination unit, and adjusting and carrying the middle lamination unit to the preset lamination area according to the error;
collecting a first pole piece position of the lower lamination unit, calculating an error between the first pole piece of the lower lamination unit and the first pole piece of the middle lamination unit stacked in a preset lamination area according to the first pole piece position of the lower lamination unit, adjusting and carrying the lower lamination unit to the middle lamination unit according to the error, and keeping the first pole piece of the lower lamination unit aligned with the first pole piece of the middle lamination unit;
vertically rotating the middle lamination unit and the lower lamination unit by 180 degrees to stack in a preset lamination area of the lamination table, adjusting to a state that the middle lamination unit is arranged above the lower lamination unit, and calculating the position difference of the first pole piece of the middle lamination unit before and after rotation;
collecting the first pole piece position of the upper lamination unit, calculating the position error of a preset lamination area of the upper lamination unit and the lamination table according to the first pole piece position of the upper lamination unit, and adjusting and carrying the upper lamination unit to the middle lamination unit according to the position difference before and after the rotation of the first pole piece of the middle lamination unit and the position error, so as to keep the first pole piece of the upper lamination unit aligned with the first pole piece of the middle lamination unit;
and carrying out hot pressing treatment on the upper lamination unit, the middle lamination unit and the lower lamination unit to complete stacking of the battery cells.
2. The lamination method according to claim 1, wherein the first pole piece is the positive pole of the upper lamination unit or the middle lamination unit or the lower lamination unit.
3. The lamination method of claim 2, wherein the step of transporting the first pole pieces of the upper lamination unit, the middle lamination unit, and the lower lamination unit upward into proximity with a lamination station comprises: and the positive poles of the upper lamination unit, the middle lamination unit and the lower lamination unit are upwards transmitted to the vicinity of the lamination table through one vacuum transmission device, or the positive poles of the upper lamination unit, the middle lamination unit and the lower lamination unit are respectively transmitted to the vicinity of the lamination table through three vacuum transmission devices.
4. The lamination method according to claim 1, wherein said and adjusting the handling of the middle lamination unit to the preset lamination area according to the error comprises adjusting the middle lamination unit to move in an X-axis direction and/or a Y-axis direction and/or to rotate around a Z-axis direction according to the error;
the step of carrying the lower lamination unit to the middle lamination unit according to the error adjustment comprises the step of adjusting the lower lamination unit to move in the X-axis direction and/or move in the Y-axis direction and/or rotate around the Z-axis direction according to the error adjustment;
the adjusting and carrying the upper lamination unit to the middle lamination unit comprises adjusting the upper lamination unit to move in the X-axis direction and/or move in the Y-axis direction and/or rotate around the Z-axis direction.
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| CN202010176936.5A CN111430814B (en) | 2020-03-13 | 2020-03-13 | Lamination method and lamination device |
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