CN110380130B - Battery cell preparation equipment and battery cell preparation method - Google Patents
Battery cell preparation equipment and battery cell preparation method Download PDFInfo
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- CN110380130B CN110380130B CN201910710772.7A CN201910710772A CN110380130B CN 110380130 B CN110380130 B CN 110380130B CN 201910710772 A CN201910710772 A CN 201910710772A CN 110380130 B CN110380130 B CN 110380130B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 510
- 238000005520 cutting process Methods 0.000 claims abstract description 172
- 230000007547 defect Effects 0.000 claims abstract description 110
- 238000001514 detection method Methods 0.000 claims abstract description 71
- 239000000758 substrate Substances 0.000 claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 claims abstract description 35
- 210000001503 joint Anatomy 0.000 claims abstract description 30
- 239000002699 waste material Substances 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 230000002950 deficient Effects 0.000 claims description 25
- 238000011143 downstream manufacturing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 17
- 238000003475 lamination Methods 0.000 description 14
- 239000002131 composite material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
- H01M10/0431—Cells with wound or folded electrodes
-
- 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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a battery cell preparation device and a battery cell preparation method, and relates to the technical field of battery production equipment. The battery cell preparation equipment comprises a first detection mechanism, a first driving mechanism, a first cutting mechanism, a first sheet feeding mechanism, a first waste rejecting mechanism and a controller. The first driving mechanism is in transmission connection with the first cutting mechanism to drive the first cutting mechanism to move relative to the substrate, the first cutting mechanism is used for cutting the first pole piece coil stock to form a first pole piece, and the first detection mechanism is used for detecting whether the first pole piece coil stock or the first pole piece has defects. The preparation method of the battery cell comprises the steps of controlling the first cutting mechanism to move to a position where the first cutting mechanism is in butt joint with the first sheet feeding mechanism under the condition that the first electrode sheet has no defect; and under the condition that the first pole piece has defects, controlling the first cutting mechanism to move to a position in butt joint with the first rejecting mechanism. The battery cell preparation equipment and the battery cell preparation method reduce the waste of pole piece materials and improve the utilization rate of the pole piece materials.
Description
Technical Field
The invention relates to the technical field of battery production equipment, in particular to battery cell preparation equipment and a battery cell preparation method.
Background
The manufacturing method of the lithium ion battery mainly comprises two steps of winding type and lamination type. The lamination process mainly comprises free lamination, Z-shaped lamination, composite lamination and the like. Wherein the composite lamination is to laminate the cathode plate, the diaphragm and the anode plate according to a certain sequence, and then heat/press the mixture for lamination. The current mode of removing the defective pole piece by the composite lamination process wastes the pole piece material, and reduces the utilization rate of the pole piece material.
Disclosure of Invention
The invention aims to provide a battery cell preparation device and a battery cell preparation method, which can remove a defective pole piece before compounding the pole piece and a diaphragm, thereby reducing the waste of pole piece materials and improving the utilization rate of the pole piece materials.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a device for preparing a battery cell, including a substrate, and a first detection mechanism, a first driving mechanism, a first cutting mechanism, a first film feeding mechanism, a first rejecting mechanism, and a controller that are disposed on the substrate;
the first detection mechanism and the first driving mechanism are respectively and electrically connected with the controller, the first driving mechanism is in transmission connection with the first cutting mechanism to drive the first cutting mechanism to move relative to the substrate, the first cutting mechanism is used for cutting the first pole piece coil stock to form a first pole piece and transmitting the first pole piece to the downstream, the first detection mechanism is used for detecting whether the first pole piece coil stock or the first pole piece has defects, and the controller is set to:
judging whether the first pole piece has defects according to the detection result of the first detection mechanism;
under the condition that the first pole piece has no defect, controlling the first cutting mechanism to move to a position where the first cutting mechanism is in butt joint with the first pole piece feeding mechanism so as to feed the first pole piece to the first pole piece feeding mechanism;
and under the condition that the first pole piece has defects, controlling the first cutting mechanism to move to a position in butt joint with the first rejecting mechanism so as to send the first pole piece to the first rejecting mechanism.
In an alternative embodiment, the first cutting mechanism is rotatably connected to the substrate, and the first driving mechanism is used for driving the first cutting mechanism to rotate relative to the substrate.
In an alternative embodiment, the first detecting mechanism is disposed upstream of the first cutting mechanism in the conveying direction of the first pole piece roll material to detect whether the first pole piece roll material has a defect, and the controller is configured to:
and judging whether the first pole piece has defects according to the detection result of the first detection mechanism, the conveying speed of the first cutting mechanism and the path length between the detection position of the first detection mechanism and the discharging position of the first cutting mechanism.
In an alternative embodiment, the first reject mechanism comprises a reject belt assembly for transporting the defective first pole piece.
In an alternative embodiment, the first sheet feeding mechanism includes a sheet feeding belt assembly for feeding the first sheet without defect.
In an alternative embodiment, the battery cell preparation device comprises a second detection mechanism, a second driving mechanism, a second cutting mechanism and a second sheet feeding mechanism which are arranged on the substrate; the second sheet feeding mechanism and the first sheet feeding mechanism are both connected to the downstream processing mechanism;
the second detection mechanism and the second driving mechanism are respectively and electrically connected with the controller, the second driving mechanism is in transmission connection with the second cutting mechanism to drive the second cutting mechanism to move relative to the substrate, the second cutting mechanism is used for cutting the second pole piece coil stock to form a second pole piece and transmitting the second pole piece to the downstream, and the second detection mechanism is used for detecting whether the second pole piece coil stock or the second pole piece has defects; the controller is configured to:
and under the condition that the first pole piece has a defect, judging whether the second pole piece has the defect, and if the second pole piece has no defect, controlling the second cutting mechanism to rotate to a position butted with the second pole piece feeding mechanism so as to feed the second pole piece to the second pole piece feeding mechanism.
In an alternative embodiment, the cell preparation device comprises a second reject mechanism, the controller being arranged to:
and if the first pole piece has a defect, controlling the second cutting mechanism to rotate to a position butted with the second reject mechanism so as to send the second pole piece to the second reject mechanism.
In an alternative embodiment, the downstream processing mechanism comprises a diaphragm mechanism, the discharge end of the first sheet feeding mechanism and the discharge end of the second sheet feeding mechanism are respectively in butt joint with the diaphragm mechanism, and the diaphragm mechanism is used for stacking diaphragms on the surfaces of the first sheet and the second sheet.
In a second aspect, an embodiment of the present invention provides a method for preparing a battery cell, which is applied to a battery cell preparation apparatus, where the battery cell preparation apparatus includes a substrate, and a first detection mechanism, a first driving mechanism, a first cutting mechanism, a first sheet feeding mechanism, and a first rejecting mechanism that are disposed on the substrate;
the first driving mechanism is in transmission connection with the first cutting mechanism to drive the first cutting mechanism to move relative to the substrate, the first cutting mechanism is used for cutting the first pole piece coil stock to form a first pole piece and transmitting the first pole piece to the downstream, and the first detection mechanism is used for detecting whether the first pole piece coil stock or the first pole piece has defects; the preparation method of the battery cell comprises the following steps:
judging whether the first pole piece has defects according to the detection result of the first detection mechanism;
under the condition that the first pole piece has no defect, controlling the first cutting mechanism to move to a position where the first cutting mechanism is in butt joint with the first pole piece feeding mechanism so as to feed the first pole piece to the first pole piece feeding mechanism;
and under the condition that the first pole piece has defects, controlling the first cutting mechanism to move to a position in butt joint with the first rejecting mechanism so as to send the first pole piece to the first rejecting mechanism.
In an alternative embodiment, the battery cell preparation device comprises a second detection mechanism, a second driving mechanism, a second cutting mechanism and a second sheet feeding mechanism which are arranged on the substrate, wherein the second sheet feeding mechanism and the first sheet feeding mechanism are connected with the downstream processing mechanism;
the second driving mechanism is in transmission connection with the second cutting mechanism to drive the second cutting mechanism to move relative to the substrate, the second cutting mechanism is used for cutting the second pole piece coil stock to form a second pole piece and transmitting the second pole piece to the downstream, and the second detection mechanism is used for detecting whether the second pole piece coil stock or the second pole piece has defects; the preparation method of the battery cell also comprises the following steps:
and under the condition that the first pole piece has a defect, judging whether the second pole piece has the defect, and if the second pole piece has no defect, controlling the second cutting mechanism to rotate to a position butted with the second pole piece feeding mechanism so as to feed the second pole piece to the second pole piece feeding mechanism.
The beneficial effects of the embodiment of the invention include:
the battery cell preparation equipment comprises a substrate, a first detection mechanism, a first driving mechanism, a first cutting mechanism, a first film feeding mechanism, a first waste rejecting mechanism and a controller, wherein the first detection mechanism, the first driving mechanism, the first cutting mechanism, the first film feeding mechanism, the first waste rejecting mechanism and the controller are arranged on the substrate. The first detection mechanism and the first driving mechanism are respectively and electrically connected with the controller, the first driving mechanism is in transmission connection with the first cutting mechanism to drive the first cutting mechanism to move relative to the substrate, the first cutting mechanism is used for cutting the first pole piece coil stock to form a first pole piece and transmitting the first pole piece to the downstream, and the first detection mechanism is used for detecting whether the first pole piece coil stock or the first pole piece has defects. The controller is configured to: judging whether the first pole piece has defects according to the detection result of the first detection mechanism; under the condition that the first pole piece has no defect, controlling the first cutting mechanism to move to a position where the first cutting mechanism is in butt joint with the first pole piece feeding mechanism so as to feed the first pole piece to the first pole piece feeding mechanism; and under the condition that the first pole piece has defects, controlling the first cutting mechanism to move to a position in butt joint with the first rejecting mechanism so as to send the first pole piece to the first rejecting mechanism. The battery cell preparation method is applied to battery cell preparation equipment, and the battery cell preparation equipment comprises a substrate, a first detection mechanism, a first driving mechanism, a first cutting mechanism, a first sheet feeding mechanism and a first waste rejecting mechanism which are arranged on the substrate; the first driving mechanism is in transmission connection with the first cutting mechanism to drive the first cutting mechanism to move relative to the substrate, the first cutting mechanism is used for cutting the first pole piece coil stock to form a first pole piece and transmitting the first pole piece to the downstream, and the first detection mechanism is used for detecting whether the first pole piece coil stock or the first pole piece has defects; the preparation method of the battery cell comprises the following steps: judging whether the first pole piece has defects according to the detection result of the first detection mechanism; under the condition that the first pole piece has no defect, controlling the first cutting mechanism to move to a position where the first cutting mechanism is in butt joint with the first pole piece feeding mechanism so as to feed the first pole piece to the first pole piece feeding mechanism; and under the condition that the first pole piece has defects, controlling the first cutting mechanism to move to a position in butt joint with the first rejecting mechanism so as to send the first pole piece to the first rejecting mechanism. The battery cell preparation equipment and the battery cell preparation method are characterized in that a first cutting mechanism which can move relative to a substrate to selectively butt-joint a first sheet feeding mechanism and a first waste rejecting mechanism is arranged, and under the condition that a first sheet does not have defects, the first cutting mechanism is controlled to move to a position of butt-joint with the first sheet feeding mechanism so as to feed the first sheet to the first sheet feeding mechanism to be fed to a downstream processing mechanism for normal processing production; under the condition that the first pole piece has defects, the first cutting mechanism is controlled to move to the position where the first cutting mechanism is in butt joint with the first reject mechanism so as to send the first pole piece to the first reject mechanism, and then the first pole piece with the defects is timely removed from a normal production line. Therefore, in the preparation process of the battery cell, the pole piece with the defect is removed before being compounded with the diaphragm, and compared with the traditional waste removing mode of directly removing the lamination unit containing the pole piece with the defect or the whole battery cell, the waste of pole piece materials is effectively reduced, and the utilization rate of the pole piece materials is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery cell preparation device during normal feeding of a first set of mechanisms in an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 3 is a schematic structural view of a first film feeding mechanism according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first reject mechanism according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a cell preparation device when the first set of mechanism performs defect pole piece reject in the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a cell preparation apparatus during normal feeding of a second set of mechanisms according to an embodiment of the present invention.
Icon: 100-cell preparation equipment; 110-a substrate; 120-a first detection mechanism; 140-a first cutting mechanism; 142-mounting plates; 143-upper receiving plate; 144-a receiving plate assembly; 145-lower receiving plate; 146-cutter assembly; 147-fixing the cutter; 148-a movable cutter; 149-discharge position; 160-a first sheet feeding mechanism; 163-a first sheet feed belt; 164-a second sheet feed belt; 165-a sheet feeding pinch roller; 170-a first reject mechanism; 173-a first reject belt; 174-a second reject belt; 175-rejecting waste compression wheels; 190-first pole piece coil stock; 192-a first auxiliary feeding mechanism; 220-a second detection mechanism; 240-a second cutting mechanism; 260-a second sheet feeding mechanism; 270-a second reject mechanism; 280-diaphragm mechanism; 290-second pole piece coil stock; 292-second auxiliary film feeding mechanism.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Defects such as air holes, foreign matter shrinkage holes, exposed foil, uneven coating thickness and the like can be generated in the pole piece in the earlier production process, and the defective pole piece can cause potential safety hazards to the performance of the battery. The current mode of removing the defective pole piece by the composite lamination process mainly comprises two modes, namely removing a lamination unit comprising a cathode piece, a diaphragm and an anode piece and removing the whole battery cell containing the defective pole piece. The occurrence of defective pole pieces is occasional. Lamination units containing defective pole pieces are divided into three types: only the cathode sheet is a defective sheet, only the anode sheet is a defective sheet, or both the cathode sheet and the anode sheet are defective sheets. Whether the lamination unit is removed or the whole battery cell is abandoned, the pole piece without defects is possibly abandoned as the pole piece with defects, the waste of pole piece materials is caused, and the utilization rate of the pole piece materials is reduced.
Referring to fig. 1, in order to solve the above problems, the present embodiment provides a battery cell manufacturing apparatus 100, which includes a substrate 110, a first detecting mechanism 120, a first driving mechanism, a first cutting mechanism 140, a first sheet feeding mechanism 160, a first rejecting mechanism 170 and a controller.
The first detection mechanism 120 and the first driving mechanism are respectively electrically connected with the controller. The first driving mechanism is in driving connection with the first cutting mechanism 140 to drive the first cutting mechanism 140 to move relative to the substrate 110. The first cutting mechanism 140 is used to cut the first pole piece roll 190 to form a first pole piece and deliver the first pole piece downstream. The first detection mechanism 120 is configured to detect whether a defect exists in the first pole piece coil 190 or the first pole piece. The controller is configured to:
judging whether the first pole piece has a defect according to the detection result of the first detection mechanism 120;
under the condition that the first pole piece has no defect, the first cutting mechanism 140 is controlled to move to a position where the first pole piece is in butt joint with the first pole piece feeding mechanism 160 so as to feed the first pole piece to the first pole piece feeding mechanism 160, and then the first pole piece is fed to a downstream processing mechanism to continue normal processing;
in the case that the first pole piece has a defect, the first cutting mechanism 140 is controlled to move to a position where the first cutting mechanism 140 is in butt joint with the first reject mechanism 170, so that the first pole piece is sent to the first reject mechanism 170, and the pole piece with the defect is rejected before the next process.
The substrate 110 is a vertical plate fixed in the battery cell manufacturing apparatus 100, and is used for installing and fixing the first detection mechanism 120, the first driving mechanism, the first cutting mechanism 140, the first sheet feeding mechanism 160, the first rejecting mechanism 170, and the like.
The first detecting mechanism 120 includes a sensor and an industrial camera, and in this embodiment, the first detecting mechanism 120 is disposed upstream of the first cutting mechanism 140 in the conveying direction of the first pole piece roll 190 to detect whether or not the first pole piece roll 190 is defective. The sensor cooperates with the industrial camera to detect if a defect is present on the first pole piece roll 190 as the first pole piece roll 190 passes upstream through the detection location of the first detection mechanism 120. In other embodiments, the first detecting mechanism 120 may also be disposed downstream of the cutting position of the first cutting mechanism 140 to directly detect the first pole piece formed by cutting.
In this embodiment, the first cutting mechanism 140 is rotatably connected to the substrate 110, and the first driving mechanism is used for driving the first cutting mechanism 140 to rotate relative to the substrate 110 to interface with the first sheet feeding mechanism 160 or interface with the first reject mechanism 170.
Specifically, the first driving mechanism includes a direct-drive motor, one end of which is mounted to the substrate 110, and the other end of which is connected to the first cutting mechanism 140.
Referring to fig. 1 and 2, the first cutting mechanism 140 includes a mounting plate 142, a receiving plate assembly 144 and a cutter assembly 146 disposed on the mounting plate 142. The mounting plate 142 is rotatably connected to the base plate 110 and is connected to the first driving mechanism. The take-up plate assembly 144 includes an upper take-up plate 143 and a lower take-up plate 145, with a first pole piece roll 190 from upstream passing between the upper take-up plate 143 and the lower take-up plate 145 to be conveyed to the cutter assembly 146 position. The cutter assembly 146 includes a stationary cutter 147 and a movable cutter 148, the movable cutter 148 being movable in a direction toward the stationary cutter 147 to cut the first pole piece roll 190, form equal length first pole pieces, and deliver the first pole pieces downstream from the discharge location 149. In other embodiments, the first cutting mechanism 140 may also perform other movement, such as a combination of translation and rotation, with respect to the substrate 110, and may be specifically designed according to an actual installation environment and an actual requirement, so that the first cutting mechanism 140 may only need to ensure that the first cutting mechanism 140 can be abutted with the first sheet feeding mechanism 160 and the first reject mechanism 170 for conveying materials after performing corresponding movement.
Referring to fig. 3, in the present embodiment, the first sheet feeding mechanism 160 includes a sheet feeding belt assembly for conveying the first sheet without defects. Specifically, the sheet feed belt assembly includes a first sheet feed belt 163 and a second sheet feed belt 164, and the first sheet feed belt 163 and the second sheet feed belt 164 rotate in opposite directions, enabling the first pole piece from the first cutting mechanism 140 to be sandwiched by the first sheet feed belt 163 and the second sheet feed belt 164 when the first cutting mechanism 140 is docked with the first sheet feed mechanism 160. The first sheet feeding belt 163 is provided with a sheet feeding pinch roller 165, and the sheet feeding pinch roller 165 is used for pinching the first sheet feeding belt 163 against the first sheet feeding belt when the first sheet feeding belt is positioned between the first sheet feeding belt 163 and the second sheet feeding belt 164 to increase the conveying force. It is understood that in other embodiments, the first sheet feeding mechanism 160 may take other forms, such as a robot arm, etc., so long as the production requirement is satisfied.
Referring to fig. 4, in the present embodiment, the first reject mechanism 170 is similar to the first sheet feeding mechanism 160. The first reject mechanism 170 includes a reject belt assembly for transporting defective first pole pieces. Specifically, the first reject mechanism 170 includes a first reject belt 173 and a second reject belt 174, and the rotation directions of the first reject belt 173 and the second reject belt 174 are opposite, so that when the first cutting mechanism 140 is docked with the first reject mechanism 170, the first pole piece from the first cutting mechanism 140 can be clamped by the first reject belt 173 and the second reject belt 174. The second scrap removing belt 174 is provided with a scrap removing pressing wheel 175, and the scrap removing pressing wheel 175 is used for pressing the second scrap removing belt 174 with the first pole piece to increase the conveying force when the first pole piece is positioned between the first scrap removing belt 173 and the second scrap removing belt 174. In addition, the conveying direction of the first reject mechanism 170 is different from that of the first sheet feeding mechanism 160, so that the defective first sheet is timely rejected from the normal production line and prevented from entering the downstream processing mechanism. In other embodiments, the first rejecting mechanism 170 may be configured in other manners, for example, by using a mechanical arm to carry or directly configured as a storage box to store the defective first pole piece from the first cutting mechanism 140, and the like, which only needs to be configured according to actual needs.
The controller may be controlled by a PC. The controller is configured to determine whether the first pole piece has a defect based on the detection result of the first detection mechanism 120, the conveying speed of the first cutting mechanism 140, and the path length between the detection position of the first detection mechanism 120 and the discharge position 149 of the first cutting mechanism 140. Specifically, in the present embodiment, the first detecting mechanism 120 is disposed upstream of the first cutting mechanism 140 to detect whether there is a defect on the first pole piece roll 190, the conveying speed of the first cutting mechanism 140 and the path length between the detecting position of the first detecting mechanism 120 and the discharging position 149 of the first cutting mechanism 140 are fixed, and the controller may process the first conveying time taken by the defect on the first pole piece roll 190 from the detecting position of the first detecting mechanism 120 to the discharging position 149 of the first cutting mechanism 140 according to the conveying speed and the path length, so that the first conveying time is also fixed, and thus, once the first detecting mechanism 120 detects that there is a defect on the first pole piece roll 190, the controller may control the first cutting mechanism 140 to rotate to the position of interfacing with the scrap tape component before the first conveying time. Also, since the length of the first pole piece is fixed in normal production, the second conveying time of the single first pole piece is also fixed, and therefore, it can be determined that the first pole piece to be sent has a defect according to the first conveying time and the second conveying time, the controller is configured to control the mounting plate 142 of the first cutting mechanism 140 to rotate to drive the whole first cutting mechanism 140 to a position where the discharging position 149 is in butt joint with the first reject mechanism 170 when the first pole piece without the defect (another first pole piece located downstream of the first pole piece with the defect) has been sent to the first sheet feeding mechanism 160 and the first pole piece with the defect has not been sent to the discharging position 149 of the first cutting mechanism 140, and then send the first pole piece with the defect to the first reject mechanism 170. In other embodiments, if the first detecting mechanism 120 is disposed downstream of the cutting position to directly detect the first pole piece formed by cutting, the first detecting mechanism 120 detects which first pole piece has a defect, that is, before the first pole piece having the defect is sent out of the discharging position 149 of the first cutting mechanism 140, the first cutting mechanism 140 is controlled by the controller to rotate to a position where it is in butt joint with the first reject mechanism 170, and then the first pole piece having the defect is sent out to the first reject mechanism 170.
The first detection mechanism 120, the first driving mechanism, the first cutting mechanism 140, the first sheet feeding mechanism 160, the first reject mechanism 170 and the controller form a first set of mechanism, and the mechanisms cooperate with each other to remove the defective electrode sheet in the battery cell preparation production line in time. In order to further improve the production efficiency of the whole battery cell preparation device 100, in this embodiment, another set of corresponding mechanism is provided in the battery cell preparation device 100 as a replacement, and when the first set of mechanism performs the reject motion, the second set of mechanism can perform the normal film feeding motion, so as to ensure the continuity of normal production.
Specifically, the cell preparation apparatus 100 includes a second detection mechanism 220, a second driving mechanism, a second cutting mechanism 240, and a second sheet feeding mechanism 260 disposed on the substrate 110. The second sheet feeding mechanism 260 and the first sheet feeding mechanism 160 are both connected to downstream processing mechanisms.
The second detecting mechanism 220 and the second driving mechanism are respectively and electrically connected with the controller, and the second driving mechanism is in transmission connection with the second cutting mechanism 240 to drive the second cutting mechanism 240 to move relative to the substrate 110. The second cutting mechanism 240 is used to cut the second pole piece web 290 to form a second pole piece and transport the second pole piece downstream. The second pole piece has the same polarity as the first pole piece. The second detection mechanism 220 is used to detect whether the second pole piece web 290 or the second pole piece is defective. The controller is configured to determine whether the second pole piece has a defect if the first pole piece has a defect, and if the second pole piece has no defect, please refer to fig. 5, control the second cutting mechanism 240 to rotate to a position of abutting against the second sheet feeding mechanism 260, so as to send the second pole piece to the second sheet feeding mechanism 260, and thus to the downstream processing mechanism.
To further enable the alternate use of the two sets of mechanisms to ensure continuous production, the cell preparation apparatus 100 includes a second reject mechanism 270. The controller is configured to control the second cutting mechanism 240 to rotate to a position to interface with the second reject mechanism 270 to send the second pole piece to the second reject mechanism 270 if the second pole piece is defective if the first pole piece is defective. The second detecting mechanism 220, the second driving mechanism, the second cutting mechanism 240, the second sheet feeding mechanism 260 and the second reject mechanism 270 form a second set of mechanism, so that any one of the first set of mechanism and the second set of mechanism can be used as a main production line, and the other one can be used as a replacement to ensure the production continuity.
In the present embodiment, the second detecting mechanism 220 and the first detecting mechanism 120, the second driving mechanism and the first driving mechanism, the second cutting mechanism 240 and the first cutting mechanism 140, the second sheet feeding mechanism 260 and the first sheet feeding mechanism 160, and the second reject mechanism 270 and the first reject mechanism 170 have the same structural composition.
The downstream processing mechanism comprises a diaphragm mechanism 280, the discharge end of the first sheet feeding mechanism 160 and the discharge end of the second sheet feeding mechanism 260 are respectively in butt joint with the diaphragm mechanism 280, and the diaphragm mechanism 280 is used for stacking diaphragms on the surfaces of the first pole piece and the second pole piece. In order to facilitate the transportation of the pole piece to the diaphragm mechanism 280, a first auxiliary feeding mechanism 192 is further disposed between the discharge end of the first pole piece feeding mechanism 160 and the diaphragm mechanism 280, a second auxiliary feeding mechanism 292 is further disposed between the discharge end of the second pole piece feeding mechanism 260 and the diaphragm mechanism 280, and the first auxiliary feeding mechanism 192 is used for feeding the first pole piece from the first pole piece feeding mechanism 160 to the diaphragm mechanism 280. The second auxiliary feeding mechanism 292 is used to take the second pole piece from the second feeding mechanism 260 to the diaphragm mechanism 280. In the present embodiment, the first auxiliary feeding mechanism 192 and the second auxiliary feeding mechanism 292 each include a mechanical arm, and the first pole piece or the second pole piece is sent to the diaphragm mechanism 280 by the mechanical arm.
In this embodiment, the first set of mechanisms is disposed above the upper working area, and the second set of mechanisms is disposed below the lower working area. When the upper working area is the main production line, the lower working area can be used as a replacement, when the upper working area carries out normal film feeding, the lower working area stands by, and when the upper working area carries out waste removal, the lower working area carries out film feeding. Referring to fig. 6, when the lower working area is the main production line, the upper working area can be used as a replacement, when the lower working area performs normal film feeding, the upper working area stands by, and when the lower working area performs waste picking, the upper working area performs film feeding. In the whole production process, the first set of mechanism and the second set of mechanism alternately send the piece, improve production efficiency. The straight arrows in the figure are used to illustrate the trend of the first pole piece and the second pole piece.
The embodiment of the invention also provides a battery cell preparation method which is applied to the battery cell preparation equipment 100, wherein the structure of the battery cell preparation equipment 100 comprises a first set of mechanisms as described above.
The technological process of the lithium ion battery is generally divided into the following contents: homogenizing, coating, rolling, cutting, tabletting, manufacturing a battery cell, filling a shell, injecting liquid, forming, separating the volume and the like. The preparation method of the battery cell comprises the following steps:
judging whether the first pole piece has a defect according to the detection result of the first detection mechanism 120;
under the condition that the first pole piece has no defect, the first cutting mechanism 140 is controlled to move to a position where the first pole piece is in butt joint with the first pole piece feeding mechanism 160 so as to feed the first pole piece to the first pole piece feeding mechanism 160, and then the first pole piece is fed to a downstream processing mechanism to continue normal processing;
in the case that the first pole piece has a defect, the first cutting mechanism 140 is controlled to move to a position where the first cutting mechanism 140 is in butt joint with the first reject mechanism 170, so that the first pole piece is sent to the first reject mechanism 170, and the pole piece with the defect is rejected before the next process.
Further, to ensure production efficiency, the cell preparation apparatus 100 further includes a second detection mechanism 220, a second driving mechanism, a second cutting mechanism 240, and a second sheet feeding mechanism 260, which are disposed on the substrate 110. The second sheet feeding mechanism 260 and the first sheet feeding mechanism 160 are both connected to downstream processing mechanisms.
The second driving mechanism is in driving connection with the second cutting mechanism 240 to drive the second cutting mechanism 240 to move relative to the substrate 110. The second cutting mechanism 240 is used to cut the second pole piece web 290 to form a second pole piece and transport the second pole piece downstream. The second detection mechanism 220 is used to detect whether the second pole piece web 290 or the second pole piece is defective. The preparation method of the battery cell also comprises the following steps:
if the first pole piece has a defect, judging whether the second pole piece has the defect, and if the second pole piece has no defect, controlling the second cutting mechanism 240 to rotate to a position where the second cutting mechanism is in butt joint with the second pole piece feeding mechanism 260 so as to feed the second pole piece to the second pole piece feeding mechanism 260.
In addition, if the second pole piece coil 290 and the first pole piece coil 190 detect defects at the same time, that is, the judging results of the first pole piece and the second pole piece are all defects, the whole equipment is stopped. When the first set of mechanism (upper working area) is the main production line, if the first pole piece coil 190 has no defect or the first pole piece is detected as having no defect, the second set of mechanism (lower working area) will be in a standby state and will not output any pole piece.
According to the preparation method of the battery cell, the electrode plate with defects is timely removed in the process of cutting to form the sheet, so that unnecessary waste of materials caused by the following procedures of diaphragm stacking, stacking unit manufacturing and the like is avoided.
The working principle and working process of the cell preparation device 100 are as follows:
when the first set of mechanism (upper working area) is used as a main production line, the first detection mechanism 120 detects whether the first pole piece coiled material 190 has defects or not, and further judges whether the first pole piece has defects or not.
If the first pole piece is not defective, the first cutting mechanism 140 moves to a position where it is in butt joint with the first sheet feeding mechanism 160, so as to feed the first pole piece to the first sheet feeding mechanism 160, and then to the downstream processing mechanism for normal processing. If no defect has been detected, the first cutting mechanism 140 will remain in the docked position with the first sheet feeding mechanism 160 and the second set of mechanisms (lower working area) will be on standby under the action of the controller.
If the first pole piece has a defect, the first cutting mechanism 140 moves to a position where the first pole piece is in butt joint with the first reject mechanism 170 so as to send the first pole piece to the first reject mechanism 170, thereby removing the defective first pole piece from the production line before stacking the diaphragms in the next process. Meanwhile, the controller controls the second set of mechanism to operate, the second detection mechanism 220 judges whether the second pole piece has defects, if the second pole piece has no defects, the second cutting mechanism 240 is controlled to rotate to the position of being in butt joint with the second sheet feeding mechanism 260, so that the second pole piece is fed to the second sheet feeding mechanism 260 and then to the diaphragm mechanism 280 for diaphragm stacking, the production continuity is effectively ensured, and the production efficiency is improved.
Thereafter, if no defect has been detected in the second sheet, the second cutting mechanism 240 will remain in the position of abutting the second sheet feeding mechanism 260 and continue to feed the second sheet to the downstream diaphragm mechanism 280. After the defective first pole piece is removed, the controller then controls the first cutting mechanism 140 to move to a position where it is in butt joint with the first feeding mechanism 160, so as to prepare for feeding a piece at any time. That is, in the process that the second cutting mechanism 240 continues to send sheets, once the second detecting mechanism 220 determines that the second sheet has defects, the controller will immediately control the first cutting mechanism 140 to send the first sheet to the first sheet sending mechanism 160, and simultaneously control the second cutting mechanism 240 to rotate to a position where it is abutted with the second reject mechanism 270, so as to send the second sheet to the second reject mechanism 270 to reject the second sheet having defects. Therefore, the first set of mechanism and the second set of mechanism alternately send the sheets, and the production efficiency is improved.
It should be noted that if the second pole piece coil 290 and the first pole piece coil 190 detect defects at the same time, that is, the first pole piece and the second pole piece are both defective, the apparatus is shut down entirely, and the apparatus is started up for production after the defects are manually removed, but the probability of this situation is very small.
In summary, the embodiment of the invention provides a battery cell preparing apparatus 100 and a battery cell preparing method, by providing the first cutting mechanism 140 capable of moving relative to the substrate 110 to selectively butt-joint the first sheet feeding mechanism 160 and the first reject mechanism 170, the controller controls the first cutting mechanism 140 to move to the position of butt-joint with the first sheet feeding mechanism 160 to feed the first sheet to the first sheet feeding mechanism 160 to be fed to the downstream processing mechanism for normal processing production in case that the first sheet has no defect. Under the condition that the first pole piece has defects, the controller controls the first cutting mechanism 140 to move to the position of being in butt joint with the first reject mechanism 170 so as to send the first pole piece to the first reject mechanism 170, and then the first pole piece with defects is removed from a normal production line in the process of cutting to the flaking in time. Therefore, in the preparation process of the battery cell, the pole piece with the defect is removed before being compounded with the diaphragm, and compared with the traditional waste removing mode of directly removing the lamination unit containing the pole piece with the defect or the whole battery cell, the waste of pole piece materials is effectively reduced, and the utilization rate of the pole piece materials is improved. And meanwhile, the second set of mechanism is arranged to replace the first set of mechanism, so that the second set of mechanism alternately feeds sheets, the production continuity is effectively ensured, and the production efficiency is improved.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The battery cell preparation equipment is characterized by comprising a substrate, a first detection mechanism, a first driving mechanism, a first cutting mechanism, a first sheet feeding mechanism, a first waste rejecting mechanism and a controller, wherein the first detection mechanism, the first driving mechanism, the first cutting mechanism, the first sheet feeding mechanism, the first waste rejecting mechanism and the controller are arranged on the substrate;
the first detection mechanism and the first driving mechanism are respectively and electrically connected with the controller, the first driving mechanism is in transmission connection with the first cutting mechanism so as to drive the first cutting mechanism to move relative to the substrate, the first cutting mechanism is used for cutting a first pole piece coil stock to form a first pole piece and transmitting the first pole piece to the downstream, the first detection mechanism is used for detecting whether the first pole piece coil stock or the first pole piece has defects, and the controller is set to:
judging whether the first pole piece has defects according to the detection result of the first detection mechanism;
controlling the first cutting mechanism to move to a position where the first cutting mechanism is in butt joint with the first sheet feeding mechanism under the condition that the first sheet does not have defects, so as to feed the first sheet to the first sheet feeding mechanism;
and under the condition that the first pole piece has defects, controlling the first cutting mechanism to move to a position in butt joint with the first waste removing mechanism so as to send the first pole piece to the first waste removing mechanism.
2. The cell preparation device of claim 1, wherein the first cutting mechanism is rotatably coupled to the base plate, and the first driving mechanism is configured to drive the first cutting mechanism to rotate relative to the base plate.
3. The battery cell manufacturing apparatus according to claim 1, wherein the first detecting mechanism is provided upstream of the first cutting mechanism in a conveying direction of the first pole piece roll to detect whether or not the first pole piece roll is defective, the controller being configured to:
judging whether the first pole piece has a defect or not according to the detection result of the first detection mechanism, the conveying speed of the first cutting mechanism and the path length between the detection position of the first detection mechanism and the discharging position of the first cutting mechanism.
4. The cell preparation apparatus of claim 1, wherein the first reject mechanism comprises a reject belt assembly for transporting the first pole piece having a defect.
5. The cell preparation apparatus of claim 1, wherein the first sheet feeding mechanism comprises a sheet feeding belt assembly for feeding the first pole piece without defects.
6. The cell preparation device of claim 1, wherein the cell preparation device comprises a second detection mechanism, a second driving mechanism, a second cutting mechanism, and a second sheet feeding mechanism disposed on the substrate; the second sheet feeding mechanism and the first sheet feeding mechanism are connected to a downstream processing mechanism;
the second detection mechanism and the second driving mechanism are respectively and electrically connected with the controller, the second driving mechanism is in transmission connection with the second cutting mechanism so as to drive the second cutting mechanism to move relative to the substrate, the second cutting mechanism is used for cutting a second pole piece coil stock to form a second pole piece and conveying the second pole piece downstream, and the second detection mechanism is used for detecting whether the second pole piece coil stock or the second pole piece has defects; the controller is configured to:
and under the condition that the first pole piece has a defect, judging whether the second pole piece has the defect, and if the second pole piece has no defect, controlling the second cutting mechanism to rotate to a position butted with the second pole piece feeding mechanism so as to feed the second pole piece to the second pole piece feeding mechanism.
7. The cell preparation device of claim 6, wherein the cell preparation device comprises a second reject mechanism, the controller configured to:
and if the first pole piece has a defect, controlling the second cutting mechanism to rotate to a position butted with the second waste rejecting mechanism so as to send the second pole piece to the second waste rejecting mechanism.
8. The cell preparation apparatus of claim 6, wherein the downstream processing mechanism comprises a diaphragm mechanism, wherein the discharge end of the first sheet feeding mechanism and the discharge end of the second sheet feeding mechanism are respectively in butt joint with the diaphragm mechanism, and the diaphragm mechanism is used for stacking diaphragms on the surfaces of the first pole piece and the second pole piece.
9. The battery cell preparation method is applied to battery cell preparation equipment and is characterized by comprising a substrate, and a first detection mechanism, a first driving mechanism, a first cutting mechanism, a first sheet feeding mechanism and a first waste rejecting mechanism which are arranged on the substrate;
the first driving mechanism is in transmission connection with the first cutting mechanism so as to drive the first cutting mechanism to move relative to the substrate, the first cutting mechanism is used for cutting a first pole piece coil stock to form a first pole piece and conveying the first pole piece downstream, and the first detection mechanism is used for detecting whether the first pole piece coil stock or the first pole piece has defects; the preparation method of the battery cell comprises the following steps:
judging whether the first pole piece has defects according to the detection result of the first detection mechanism;
controlling the first cutting mechanism to move to a position where the first cutting mechanism is in butt joint with the first sheet feeding mechanism under the condition that the first sheet does not have defects, so as to feed the first sheet to the first sheet feeding mechanism;
and under the condition that the first pole piece has defects, controlling the first cutting mechanism to move to a position in butt joint with the first waste removing mechanism so as to send the first pole piece to the first waste removing mechanism.
10. The method of claim 9, wherein the cell preparation device comprises a second detection mechanism, a second driving mechanism, a second cutting mechanism, and a second sheet feeding mechanism, which are disposed on the substrate, wherein the second sheet feeding mechanism and the first sheet feeding mechanism are both connected to a downstream processing mechanism;
the second driving mechanism is in transmission connection with the second cutting mechanism to drive the second cutting mechanism to move relative to the substrate, the second cutting mechanism is used for cutting a second pole piece coil stock to form a second pole piece and conveying the second pole piece downstream, and the second detection mechanism is used for detecting whether the second pole piece coil stock or the second pole piece has defects; the preparation method of the battery cell further comprises the following steps:
and under the condition that the first pole piece has a defect, judging whether the second pole piece has the defect, and if the second pole piece has no defect, controlling the second cutting mechanism to rotate to a position butted with the second pole piece feeding mechanism so as to feed the second pole piece to the second pole piece feeding mechanism.
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| CN115732641A (en) * | 2021-08-31 | 2023-03-03 | 宁德时代新能源科技股份有限公司 | Removing device, pole piece processing equipment and removing method |
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