CN116682929B - Automatic production line for dry electrode preparation of power battery - Google Patents
Automatic production line for dry electrode preparation of power battery Download PDFInfo
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- CN116682929B CN116682929B CN202310808866.4A CN202310808866A CN116682929B CN 116682929 B CN116682929 B CN 116682929B CN 202310808866 A CN202310808866 A CN 202310808866A CN 116682929 B CN116682929 B CN 116682929B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims description 17
- 238000007731 hot pressing Methods 0.000 claims abstract description 87
- 238000013329 compounding Methods 0.000 claims abstract description 81
- 238000004804 winding Methods 0.000 claims abstract description 58
- 239000002131 composite material Substances 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims description 60
- 238000004140 cleaning Methods 0.000 claims description 44
- 238000009966 trimming Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 24
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 150000001875 compounds Chemical class 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 16
- 238000007493 shaping process Methods 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 21
- 230000008569 process Effects 0.000 abstract description 21
- 239000012790 adhesive layer Substances 0.000 abstract description 20
- 238000009736 wetting Methods 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 15
- 239000002994 raw material Substances 0.000 description 14
- 230000001105 regulatory effect Effects 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007719 peel strength test Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
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- 230000037303 wrinkles Effects 0.000 description 2
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- 238000000576 coating method Methods 0.000 description 1
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- 239000006258 conductive agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
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- 229920006267 polyester film Polymers 0.000 description 1
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
- B65H23/032—Controlling transverse register of web
- B65H23/038—Controlling transverse register of web by rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/16—Registering, tensioning, smoothing or guiding webs longitudinally by weighted or spring-pressed movable bars or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/02—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with longitudinal slitters or perforators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
-
- 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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- 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)
Abstract
The invention provides an automatic production line for preparing a dry electrode of a power battery, which comprises the following steps: the electrode film forming device and the current collector composite device comprise a current collector unreeling device; the hot-pressing composite device is arranged behind the current collector unreeling device; the electrode film unreeling devices are arranged on the hot-pressing rack and symmetrically distributed relative to the hot-pressing compounding device, and are used for smoothly unreeling the electrode film produced by the electrode film forming device and conveying the electrode film to the hot-pressing compounding pair roller to be hot-pressed and compounded with the current collector; and the winding device is arranged at the rear side of the hot-pressing composite device. The invention adopts the independent unreeling and double-sided hot-pressing compounding process of the electrode film, improves the compounding efficiency and quality of the current collector and the electrode film, and can soften the adhesive layer on the surface of the current collector and improve the compounding strength between the current collector and the electrode film by wetting and preheating the front and aspects of the current collector before hot-pressing compounding.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to an automatic production line for preparing a dry electrode of a power battery.
Background
The electrode film is one of the key conditions for determining the energy density of the battery, and in the prior art, the preparation process of the electrode film is mainly divided into a wet coating preparation process and a dry electrode film preparation process. In the dry electrode film manufacturing process, firstly, electrode active materials, conductive agents and adhesives are mixed to obtain electrode powder without using any solvent; and then the electrode powder is manufactured to form a thin electrode material strip, and finally the formed electrode material strip is pressed onto a metal foil current collector to form a finished electrode.
Chinese patent application publication No. CN114039021a discloses a dry electrode film preparation device and a battery production line, comprising: the first-stage pretreatment device comprises a first compression device and a cutter device, wherein the output end of the first compression device corresponds to the input end of the cutter device, the first compression device is used for compressing the dry powder raw material so as to enable the dry powder raw material to form a compressed form, and the cutter device is used for cutting the dry powder raw material in the compressed form into a block form; the second-stage pretreatment device comprises a second compression device, wherein the second compression device is used for compression molding of dry powder raw materials in a block shape to form a semi-finished dry electrode film; the pressure-extending device comprises at least one stage of pressure-extending roller group, and each stage of pressure-extending roller group comprises at least one pair of pressure-extending rollers. According to the invention, the mixed dry powder raw materials are subjected to compression pretreatment for two times to form the semi-finished dry electrode film with certain self-supporting property, and then the semi-finished dry electrode film is subjected to delay press treatment, so that the problem of breakage of the electrode film is effectively avoided. However, the process cannot perform trimming and thinning operations on the electrode film, the thickness of the electrode film cannot be accurately controlled, the produced electrode film has large resistance and poor adaptability, and a subsequent current collector compounding process is not disclosed.
Chinese patent application publication No. CN116093243a discloses a current collector compounding device and a dry coater, wherein the current collector compounding device comprises: the rolling mechanism comprises two press rolls, a roll gap is formed between the two press rolls, the current collector sent out by the current collector supply mechanism and the mixed material sent out by the mixed material supply mechanism enter the roll gap respectively, the current collector and the mixed material are sequentially distributed in the roll gap along the arrangement direction of the two press rolls, and the rolling mechanism can complete the rolling of the mixed material and the compounding of the current collector in one-time rolling, so that the equipment structure and the process are simplified, and the risk of breakage easily caused by an electrode film in a single conveying process is avoided. However, in the actual production process of the current collector, the compounding of the electrode material and the current collector is finished through one-time rolling, the risk of uneven material mixing is increased, the film forming quality of the electrode film cannot be guaranteed, once the quality of the electrode film is low, the quality of the current collector is poor due to the fact that no corresponding adjusting means are arranged in the follow-up process, and the yield cannot be guaranteed. In addition, how to improve the composite strength between the current collector and the electrode film in the direct hot-pressing composite process is also a technical problem which needs to be solved in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an automatic production line for preparing a dry electrode of a power battery, which not only can realize automatic rolling film forming, shaping and reinforcing, accurate thinning, automatic trimming and rolling of an electrode film, but also can be matched with a subsequent current collector compounding device, adopts the processes of independent unreeling and double-sided hot-pressing compounding of the electrode film, improves the compounding efficiency and quality of the current collector and the electrode film, and can soften an adhesive layer on the surface of the current collector and improve the compounding strength between the current collector and the electrode film by wetting and preheating the front and aspects of the current collector before hot-pressing compounding.
In order to achieve the above technical scheme, the invention provides an automatic production line for preparing a dry electrode of a power battery, comprising the following steps: the electrode film forming device comprises a film forming frame, wherein a material mixing conveying mechanism is arranged on the film forming frame, a film forming mechanism is arranged behind the material mixing conveying mechanism, the material mixing conveying mechanism is used for conveying ingredients into the film forming mechanism after metering and mixing, a shaping box is arranged at an outlet of the film forming mechanism, and a first electrode film conveying guide roller, a first trimming mechanism, a second electrode film tension swing roller, a first electrode film deviation correcting roller, a second electrode film conveying guide roller, a thinning mechanism, a third electrode film conveying guide roller, a second trimming mechanism, a second electrode film tension swing roller, a second electrode film deviation correcting roller and an electrode film winding roller are sequentially arranged behind the shaping box according to the electrode film conveying direction; the current collector composite device comprises a current collector unreeling device, wherein the current collector unreeling device is used for smoothly unreeling and conveying a reeled current collector backwards; the hot-pressing compound device comprises a hot-pressing rack, a pair of hot-pressing compound paired rollers which are transversely attached to each other are arranged on the hot-pressing rack, a hot-pressing compound area is formed in a paired roller attaching area of the hot-pressing compound paired rollers, a preheating bellows is arranged right above the hot-pressing compound area on the hot-pressing rack, a second import roller is arranged right above the preheating bellows, a first humidifying roller and a second humidifying roller are arranged on one side of the second import roller side by side up and down, a sprayer is arranged between the first humidifying roller and the second humidifying roller and is right opposite to the front face of a conveyed current collector, the first import roller is arranged above the first humidifying roller, and a compound export roller is arranged right below the hot-pressing compound area; the electrode film unreeling devices are arranged on the hot-pressing frame and symmetrically distributed relative to the hot-pressing compounding device, and are used for smoothly unreeling the electrode film produced by the electrode film forming device and conveying the electrode film to the hot-pressing compounding pair roller to be hot-pressed and compounded with the current collector; and the winding device is arranged at the rear side of the hot-pressing compounding device and is used for winding the finished product subjected to hot-pressing compounding.
In the technical scheme, when the electrode film manufacturing machine is in actual work, raw materials for producing the electrode film are successfully mixed, added into a mixed material conveying mechanism, conveyed into a film forming mechanism through the mixed material conveying mechanism, rolled into a film, then heated and shaped through a shaping box, then trimmed, conveyed to a thinning mechanism after trimming to accurately thin the electrode film, so that the thickness of the electrode film meets the technological requirements, trimmed and rolled up, and the electrode film is compounded for later use. In the subsequent current collector compounding process, an electrode film produced by an electrode film forming device is placed in an electrode film unreeling device, a rolled current collector is placed in the current collector unreeling device and stably unreeled and conveyed backwards through the current collector unreeled device, the current collector enters a hot-pressing compounding device through a first guide-in roller, the unreeled current collector firstly wets the back surface of the current collector through a first humidifying roller, then carries out spray humidification on the front surface through a sprayer, then carries out secondary humidification on the back surface of the current collector through a second humidifying roller, so that conductive adhesive layers on the upper surface and the lower surface of the current collector are humidified and softened, then conveyed into a preheating bellows for preheating, the conductive adhesive layers on the upper surface and the lower surface of the current collector are further softened, the viscosity of the conductive adhesive layers is activated in advance before contacting with the electrode film, meanwhile, the two electrode films which are symmetrically distributed on a hot-pressing rack are required to be compounded are unreeled through the electrode film unreeled through the first humidifying roller, a compounding region of the compounding roller and the current collector subjected to double-sided compounding through the humidifying roller, then carries out hot-pressing compounding on the back surface of the current collector through the second humidifying roller, so that the conductive adhesive layers on the upper surface and lower surface of the current collector are subjected to contact with the electrode film, and the electrode film is subjected to heat-pressing, and the electrode film is tightly distributed through the hot-pressing roller, and the electrode film is finally, and the electrode film is discharged through the hot-pressing compounding roller, and the heat-finished.
Preferably, the material mixing conveying mechanism comprises a feeding hopper arranged on the film forming frame, a metering pump is arranged at a discharging hole of the feeding hopper, a spiral material mixer is arranged at a discharging hole of the metering pump, a material falling hopper is arranged at a discharging end of the spiral material mixer, and the material falling hopper is positioned right above the film forming mechanism. During actual operation, raw materials for producing the electrode film are successfully mixed, then added into the feed hopper, accurately metered by the metering pump and then fall into the spiral mixer, and after being mixed by the spiral mixer, the raw materials are conveyed into the blanking hopper to be blanked into the film forming mechanism.
Preferably, the film forming mechanism comprises a film forming pressure adjusting cylinder, a film forming pressure cleaning roller, a film forming press roller, a film forming roller and a film forming cleaning roller, wherein the film forming press roller and the film forming roller are horizontally and closely installed on the film forming frame in parallel, the film forming cleaning roller is parallelly installed on the right side of the film forming roller and closely installed with the film forming roller, the film forming pressure cleaning roller is installed on the left side of the film forming press roller and closely installed with the film forming press roller, and the film forming pressure adjusting cylinder is horizontally installed on the film forming frame and connected with the film forming pressure cleaning roller. During actual working, a film forming press area is formed between the film forming press roller and the film forming roller, ingredients in the blanking hopper fall into the film forming press area to roll into films, the film forming pressure cleaning roller and the film forming cleaning roller are respectively used for cleaning the surfaces of the film forming press roller and the film forming roller, so that the surfaces of the film forming press roller and the film forming roller are always kept clean, the film forming quality is improved, and the pressure between the film forming pressure cleaning roller and the film forming press roller and the pressure between the film forming press roller and the film forming roller can be regulated through the film forming pressure regulating cylinder, so that the film forming pressure in the film forming press area can be controlled.
Preferably, the first trimming mechanism comprises a first trimming supporting roller and a first trimming cutter, and the first trimming cutter is arranged above the first trimming supporting roller; the second side cut mechanism includes second side cut backing roll and second side cut sword, the second side cut sword is installed in the top of second side cut backing roll. During actual operation, the electrode film is trimmed through the cooperation between the trimming knife and the trimming support roller.
Preferably, the thinning mechanism comprises a thinning rack, wherein the thinning press roller and the thinning roller are arranged on the thinning rack in a parallel and clinging mode, the thinning cleaning roller is arranged below the thinning roller and clings to the thinning roller, the thinning pressure cleaning roller is arranged above the thinning press roller and clings to the thinning press roller, and the thinning pressure adjusting cylinder is arranged at the top of the thinning rack and is vertically downwards connected with the thinning pressure cleaning roller. During actual operation, the pressure of the thinning press roller to the thinning roller can be adjusted through the thinning pressure adjusting cylinder driving the thinning pressure cleaning roller, and then the thinning thickness of the electrode film can be accurately adjusted, and the thinning pressure cleaning roller and the thinning cleaning roller are respectively used for cleaning the surfaces of the thinning press roller and the thinning roller, so that the surfaces of the thinning press roller and the thinning roller are always kept clean, and the thinning quality is improved.
Preferably, the current collector unreeling device comprises an unreeling rack, a current collector unreeling roller is mounted on the unreeling rack, a current collector unreeling first guide roller is mounted at the rear of the current collector unreeling roller, an unreeling tension detector is mounted at the rear of the current collector unreeling first guide roller, a first guide roller and a second guide roller are mounted at the rear of the unreeling tension detector, a current collector unreeling tension adjusting swing roller is mounted at the rear of the second guide roller, the current collector unreeling tension adjusting swing roller is mounted on the current collector unreeling tension adjusting swing arm, a current collector unreeling tension adjusting cylinder is mounted on the unreeling rack and connected with the current collector unreeling tension adjusting swing arm, a third guide roller is mounted at the rear of the third guide roller, a spreader roller is mounted at one side of the spreader roller, a spreader roller is mounted on the spreader roller, a spreader roller pressure cylinder is mounted on the spreader roller and is connected with the rear of the unreeling rack, and a fourth guide roller is mounted at the rear of the spreader swing arm. During actual operation, the current collector rolls are placed on the current collector unreeling rollers, constant-speed unreeling is carried out through the current collector unreeling rollers, after the current collector is led out through the current collector unreeling first guide rollers, unreeling tension is detected on line through an unreeling tension detector, so that the unreeling tension of the current collector meets the requirements, current collector breakage possibly caused by overlarge unreeling tension is avoided, or current collector wrinkles possibly caused by overlarge unreeling tension are generated, the current collector after tension detection enters the current collector unreeling tension adjusting swing rollers after passing through transition of the first guide rollers and the second guide rollers, the current collector unreeling tension adjusting swing arms are adjusted through the current collector unreeling tension adjusting cylinders, the current collector after tension adjustment subsequently enters an unreeling compression region formed by the unreeling rollers and the unreeling compression rollers, the upper surface and the lower surface of the current collector are smooth, the quality of subsequent hot-pressing compounding is improved, and the current collector after unreeling finally enters the hot-pressing compounding device after passing through the current collector unreeling second guide rollers.
Preferably, a current collector unreeling deviation rectifying device is arranged between the unfolding roller and the fourth guide roller, the current collector unreeling deviation rectifying device comprises a current collector unreeling deviation rectifying roller, the current collector unreeling deviation rectifying roller is arranged between the unfolding roller and the fourth guide roller, the current collector unreeling deviation rectifying roller is arranged on a deviation rectifying swing arm, and a deviation rectifying cylinder is arranged on the unreeling rack and is connected with the deviation rectifying swing arm. During actual operation, the current collector after being stretched can be rectified through the current collector unreeling rectifying roller, and during rectification, the rectifying swing arm can be driven by the rectifying cylinder to realize the adjustment of the position and the angle of the current collector unreeling rectifying roller, so that the rectification of the current collector in the conveying process can be realized.
Preferably, the electrode film unreeling device comprises an electrode film unreeling roller, one side of the electrode film unreeling roller is provided with an electrode film unreeling first guiding roller, the rear of the electrode film unreeling first guiding roller is provided with an electrode film unreeling deviation correcting roller, an electrode film unreeling tension adjusting roller, a fifth guide roller and a sixth guide roller in sequence along the electrode film unreeling direction, the electrode film unreeling tension adjusting roller is arranged on an electrode film unreeling tension adjusting swing arm, the electrode film unreeling tension adjusting cylinder is arranged on a hot press frame and is connected with one end of the electrode film unreeling tension adjusting swing arm, and the sixth guide roller is positioned above the hot press composite counter roller. During actual operation, the electrode film rolls are placed on the electrode film unreeling roller, uniform unreeling is carried out through the electrode film unreeling roller, and after deviation correction and tension adjustment of the electrode film unreeling deviation correcting roller and the electrode film unreeling tension adjusting roller, the electrode film rolls stably enter the hot-pressing composite pair roller to be hot-pressing composite with the current collector.
Preferably, the winding device comprises a winding rack, and a winding leading-in roller, a seventh guide roller, a winding tension adjusting roller, an eighth guide roller, a ninth guide roller, a tenth guide roller, a winding leading-out roller and a winding roller are sequentially arranged on the winding rack along the winding direction. During actual operation, the current collector composite body subjected to hot-pressing compounding is subjected to stable rolling through the rolling roller after sequentially passing through the rolling leading-in roller, the seventh guide roller, the rolling tension adjusting roller, the eighth guide roller, the ninth guide roller, the tenth guide roller and the rolling leading-out roller.
Preferably, a winding tension detector is arranged between the ninth guide roller and the tenth guide roller, and winding tension can be monitored on line in real time through the winding tension detector, so that winding speed can be controlled better, and winding quality can be improved.
The dry electrode preparation automatic production line of the power battery has the beneficial effects that:
(1) The invention adopts an independent segmentation process for electrode film forming and current collector compounding, the production of the electrode film is independent and controllable, the quality control of the electrode film is convenient, the electrode film can be matched with a subsequent current collector compounding device, the compounding efficiency and quality of the current collector and the electrode film are improved by adopting an independent unreeling and double-sided hot-pressing compounding process of the electrode film, and the adhesive layer on the surface of the current collector can be softened by wetting and preheating the front surface and aspects of the current collector before hot-pressing compounding, so that the compounding strength between the current collector and the electrode film is improved.
(2) According to the invention, through the structural design of the electrode film forming device, the automatic feeding, rolling and film forming, shaping and reinforcing, accurate thinning, automatic trimming and rolling of the electrode film are realized, the thickness of the electrode film can be accurately controlled, and the produced electrode film has small resistance, high strength and strong adaptability.
(3) According to the invention, through structural design of the hot-pressing compounding device, the first humidifying roller, the second humidifying roller and the sprayer are arranged to humidify the front surface and the back surface of the current collector respectively, so that the conductive adhesive layers on the upper surface and the lower surface of the current collector are humidified and softened, then through arrangement of the preheating bellows, the humidified current collector is preheated through the preheating bellows, so that the conductive adhesive layers on the upper surface and the lower surface of the current collector are further softened, the viscosity of the conductive adhesive layers is activated in advance before the current collector contacts with the electrode film, and finally the current collector and the electrode film are subjected to double-sided hot-pressing compounding in a hot-pressing compounding region of the hot-pressing compounding pair roller, so that a compact current collector complex is formed, and the compounding strength between the current collector and the electrode film is greatly improved. The product of the heat pressing compounding area of the heat pressing compounding roller is tested, and the peeling strength between the electrode film and the current collector is 0.13N/m, while the peeling strength between the electrode film and the current collector is 0.19N/m, which is improved by 38%.
(4) According to the invention, through the structural design of the current collector unreeling device, the online detection of the tension in the current collector unreeling process, the automatic adjustment of the tension, the automatic correction and the automatic extension of the upper surface and the lower surface of the current collector can be realized, the unreeling quality of the current collector is greatly improved, and the phenomena of breakage, fold and uneven and smooth surface of the current collector, which are easily caused by tension fluctuation in the current collector unreeling process, are effectively avoided.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
FIG. 2 is a schematic diagram of an electrode film forming apparatus according to the present invention.
Fig. 3 is a schematic structural view of a current collector composite device according to the present invention.
Fig. 4 is a schematic structural view of a current collector unreeling device of the present invention.
Fig. 5 is a schematic structural view of a hot press compounding device and an electrode film unreeling device in the present invention.
Fig. 6 is a schematic structural diagram of a winding device in the present invention.
In the figure: 1. an electrode film forming device; 11. a film forming frame; 12. a feed hopper; 13. a metering pump; 14. a spiral mixer; 15. a blanking hopper; 16. a film forming pressure adjusting cylinder; 17. film forming pressure cleaning roller; 18. a film forming press roll; 19. a shaping box; 110. a first electrode film conveying guide roller; 111. a film forming roller; 112. a film forming cleaning roller; 113. a first tangential support roller; 114. a first edge cutter; 115. a first electrode film tension swing roller; 116. a first electrode film deviation correcting roller; 117. a second electrode film conveying guide roller; 118. thinning the frame; 119. thinning the pressure cleaning roller; 120. thinning a press roller; 121. thinning a pressure regulating cylinder; 122. thinning the cleaning roller; 123. thinning rollers; 124. a third electrode film conveying guide roller; 125. a second trimming support roller; 126. a second trimming blade; 127. a second electrode film tension swing roller; 128. a second electrode film deviation correcting roller; 129. an electrode film wind-up roll; 2. a current collector composite device; 21. a current collector unreeling device; 211. unreeling the frame; 212. a current collector unreeling roller; 213. the current collector unreels the first guiding-out roller; 214. an unreeling tension detector; 215. a first guide roller; 216. a second guide roller; 217. current collector unreeling tension adjusting swing roller; 218. current collector unreeling tension adjusting swing arm; 219. current collector unreeling tension adjusting cylinder; 2110. a third guide roller; 2111. stretching the press roller; 2112. a spreader roll; 2113. stretching a press roller swing arm; 2114. stretching a compression roller pressure cylinder; 2115. unreeling deviation correcting roller for current collector; 2116. deviation rectifying swing arms; 2117. a deviation correcting cylinder; 2118. a fourth guide roller; 2119. the current collector unreels a second guiding-out roller; 22. a hot-pressing compounding device; 221. a hot press frame; 222. hot-pressing and compounding the paired rollers; 223. a first introduction roller; 224. a first humidifying roller; 225. a sprayer; 226. a second humidifying roller; 227. a second introduction roller; 228. preheating a bellows; 229. a composite lead-out roller; 23. an electrode film unreeling device; 231. an electrode film unreeling roller; 232. unreeling the electrode film from a second lead-out roller; 233. unreeling the electrode film from a first lead-out roller; 234. an electrode film unreeling deviation correcting roller; 235. an electrode film unreeling tension adjusting roller; 236. a fifth guide roller; 237. an electrode film unreeling tension adjusting swing arm; 238. an electrode film unreeling tension adjusting cylinder; 239. a sixth guide roller; 24. a winding device; 241. a winding frame; 242. a winding lead-in roller; 243. a seventh guide roller; 244. a winding tension adjusting roller; 245. an eighth guide roller; 246. a ninth guide roller; 247. a winding tension detector; 248. a tenth guide roller; 249. winding and guiding out rollers; 2410. and (5) a wind-up roller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present invention.
Examples: an automatic production line for preparing dry electrode of power battery.
Referring to fig. 1 to 6, an automated production line for dry electrode preparation of a power battery includes:
the electrode film forming device 1, the electrode film forming device 1 includes film forming frame 11, install compounding conveying mechanism on the film forming frame 11, compounding conveying mechanism is including installing the feeder hopper 12 on film forming frame 11, metering pump 13 is installed to the discharge gate of feeder hopper 12, spiral blendor 14 is installed to the discharge gate of metering pump 13, blanking hopper 15 is installed to the terminal ejection of compact of spiral blendor 14, blanking hopper 15 is located film forming mechanism directly over. In actual operation, raw materials for producing the electrode film are successfully mixed, then added into the feed hopper 12, accurately measured by the metering pump 13 and then fall into the spiral mixer 14, and after being mixed by the spiral mixer 14, the raw materials are conveyed into the blanking hopper 15 for blanking into the film forming mechanism.
The film forming mechanism is arranged behind the material mixing conveying mechanism and comprises a film forming pressure adjusting cylinder 16, a film forming pressure cleaning roller 17, a film forming press roller 18, a film forming roller 111 and a film forming cleaning roller 112, wherein the film forming press roller 18 and the film forming roller 111 are horizontally and closely arranged on the film forming frame 11, the film forming cleaning roller 112 is horizontally arranged on the right side of the film forming roller 111 and closely arranged with the film forming roller 111, the film forming pressure cleaning roller 17 is arranged on the left side of the film forming press roller 18 and closely arranged with the film forming press roller 18, and the film forming pressure adjusting cylinder 16 is horizontally arranged on the film forming frame 11 and is connected with the film forming pressure cleaning roller 17. In actual operation, a film forming nip is formed between the film forming press roller 18 and the film forming roller 111, ingredients in the blanking hopper 15 fall into the film forming nip to roll into films, the film forming pressure cleaning roller 17 and the film forming cleaning roller 112 are respectively used for cleaning the surfaces of the film forming press roller 18 and the film forming roller 111, so that the surfaces of the film forming press roller 18 and the film forming roller 111 are always clean, the film forming quality is improved, and the pressure between the film forming pressure cleaning roller 17 and the film forming press roller 18 and the pressure between the film forming press roller 18 and the film forming press roller 111 can be regulated through the film forming pressure regulating cylinder 16, so that the film forming pressure in the film forming nip is controlled.
The outlet of the film forming mechanism is provided with a shaping box 19, the shaping box 19 is used for shaping and reinforcing the electrode film after film forming so as to improve the tensile strength of the electrode film, and the rear part of the shaping box 19 is sequentially provided with a first electrode film conveying guide roller 110, a first trimming mechanism, a second electrode film tension swing roller 115, a first electrode film deviation correcting roller 116, a second electrode film conveying guide roller 117, a thinning mechanism, a third electrode film conveying guide roller 124, a second trimming mechanism, a second electrode film tension swing roller 127, a second electrode film deviation correcting roller 128 and an electrode film winding roller 129 according to the conveying direction of the electrode film; wherein, the thinning mechanism includes the thinning frame 118, and the thinning compression roller 120 and the thinning roller 123 are installed in parallel side by side on the thinning frame 118, and the thinning cleaning roller 122 is installed in the below of thinning roller 123 and is hugged closely setting with the thinning roller 123, and the thinning pressure cleaning roller 119 is installed in the top of thinning compression roller 120 and hugs closely setting with the thinning compression roller 120, and the thinning pressure adjusting cylinder 121 is installed at the top of thinning frame 118 and is connected with the thinning pressure cleaning roller 119 vertically downwards. In actual operation, the pressure of the thinning press roller 120 to the thinning roller 123 can be regulated by driving the thinning pressure cleaning roller 119 through the thinning pressure regulating cylinder 121, and further the thinning thickness of the electrode film can be accurately regulated, and the thinning pressure cleaning roller 119 and the thinning cleaning roller 122 are respectively used for cleaning the surfaces of the thinning press roller 120 and the thinning roller 123, so that the surfaces of the thinning press roller 120 and the thinning roller 123 are always kept clean, and the thinning quality is improved. The first trimming mechanism comprises a first trimming supporting roller 113 and a first trimming cutter 114, wherein the first trimming cutter 114 is arranged above the first trimming supporting roller 113; the second trimming mechanism includes a second trimming support roller 125 and a second trimming blade 126, the second trimming blade 126 being mounted above the second trimming support roller 125. During actual operation, the electrode film is trimmed through the cooperation between the trimming knife and the trimming support roller.
In this embodiment, during actual operation, after the raw materials for producing the electrode film are successfully proportioned, the raw materials are added into the material mixing and conveying mechanism, and are conveyed into the film forming mechanism through the material mixing and conveying mechanism to roll into a film, then the film is shaped by heating through the shaping box 19, then the edge is cut, and the film is conveyed to the thinning mechanism to accurately thin the electrode film after the edge is cut, so that the thickness of the electrode film meets the technological requirements, and then the edge is cut and rolled for the subsequent current collector to be compounded for later use.
The current collector composite device 2, the current collector composite device 2 comprises a current collector unreeling device 21, and the current collector unreeling device 21 is used for smoothly unreeling and conveying the reeled current collector backwards. The current collector unreeling device 21 comprises an unreeling rack 211, a current collector unreeling roller 212 is mounted on the unreeling rack 211, a current collector unreeling first guide roller 213 is mounted at the rear of the current collector unreeling roller 212, an unreeling tension detector 214 is mounted at the rear of the current collector unreeling first guide roller 213, the unreeling tension detector 214 is used for monitoring the tension of a current collector in the unreeling process in real time, a first guide roller 215 and a second guide roller 216 are mounted at the rear of the unreeling tension detector 214, a current collector unreeling tension adjusting swing roller 217 is mounted at the rear of the second guide roller 216, the current collector unreeling tension adjusting swing roller 217 is mounted on a current collector unreeling tension adjusting swing arm 218, a current collector unreeling tension adjusting cylinder 219 is mounted on the unreeling rack 211 and is connected with the current collector unreeling tension adjusting swing arm 218, and in actual working, the position of the current collector unreeling tension adjusting swing roller 217 is adjusted through the current collector unreeling tension adjusting cylinder 219, and thus the position of the current collector unreeling tension adjusting swing arm 217 is adjusted, and the current collector unreeling tension adjusting swing arm is adjusted; a third guide roller 2110 is installed at the rear of the current collector unreeling tension adjusting swing roller 217, a spreader roller 2112 is installed at the rear of the third guide roller 2110, a spreader roller 2111 is installed at one side of the spreader roller 2112, the spreader roller 2111 is installed on a spreader roller swing arm 2113, a spreader roller pressure cylinder 2114 is installed on the unreeling frame 211 and is connected with the rear end of the spreader roller swing arm 2113, during actual working, the spreader roller swing arm 2113 is driven by the spreader roller pressure cylinder 2114, the pressure between the spreader roller 2112 and the spreader roller 2111 can be adjusted, and when the current collector enters a spreader pressure zone formed by the spreader roller 2112 and the spreader roller 2111, the upper surface and the lower surface of the current collector are spread, and the upper surface and the lower surface of the current collector are ensured to be flat; a fourth guide roller 2118 is installed at the rear of the stretching roller 2112, a current collector unreeling second guide roller 2119 is installed at the rear of the fourth guide roller 2118, a current collector unreeling deviation correcting device is installed between the stretching roller 2112 and the fourth guide roller 2118, the current collector unreeling deviation correcting device comprises a current collector unreeling deviation correcting roller 2115, the current collector unreeling deviation correcting roller 2115 is installed between the stretching roller 2112 and the fourth guide roller 2118, the current collector unreeling deviation correcting roller 2115 is installed on a deviation correcting swing arm 2116, and a deviation correcting cylinder 2117 is installed on the unreeling rack 211 and connected with the deviation correcting swing arm 2116. In actual operation, the stretched current collector can be rectified through the current collector unreeling rectifying roller 2115, and the rectifying swing arm 2116 can be driven by the rectifying cylinder 2117 to realize the adjustment of the position and the angle of the current collector unreeling rectifying roller 2115 during rectification, so that the rectification of the current collector in the conveying process can be realized.
In this embodiment, through the structural design of the current collector unreeling device 21, the online tension detection, the automatic tension adjustment, the automatic deviation correction and the automatic extension of the upper surface and the lower surface of the current collector in the current collector unreeling process can be realized, the unreeling quality of the current collector is greatly improved, and the phenomena of breakage, fold and uneven and smooth surface of the current collector, which are easily caused by tension fluctuation in the current collector unreeling process, are effectively avoided. In actual operation, the current collector rolls are placed on the current collector unreeling roller 212, uniform unreeling is performed through the current collector unreeling roller 212, after the current collector is led out through the current collector unreeling first guide roller 213, the unreeling tension is detected on line through the unreeling tension detector 214, so that the unreeling tension of the current collector meets the requirements, the current collector breakage possibly caused by overlarge unreeling tension or the current collector possibly caused by overlarge unreeling tension generates wrinkles, the current collector after tension detection enters the current collector unreeling tension adjusting swing roller 217 after passing through transition of the first guide roller 215 and the second guide roller 216, the current collector unreeling tension adjusting swing arm 218 is adjusted through the current collector unreeling tension adjusting cylinder 219, the current collector after tension adjustment subsequently enters an unreeling compression region formed by the unreeling roller 2 and the unreeling compression roller 1, the upper surface and the lower surface of the current collector are smooth, the quality of subsequent compounding is improved, the current collector after tension detection subsequently enters the thermal compression roller 2119 after the current collector unreeling is finally carried out through the current collector unreeling roller 2115, and the current collector is guided out into the thermal compression roller 2119 after the thermal compression roller 2119.
The hot pressing composite device 22 is arranged behind the current collector unreeling device 21, the hot pressing composite device 22 comprises a hot pressing rack 221, a pair of hot pressing composite pair rollers 222 which are transversely attached to each other are arranged on the hot pressing rack 221, a hot pressing composite area is formed in a pair roller attaching area of the hot pressing composite pair rollers 222, a preheating bellows 228 is arranged right above the hot pressing composite area on the hot pressing rack 221, a second lead-in roller 227 is arranged right above the preheating bellows 228, a first humidifying roller 224 and a second humidifying roller 226 are arranged on one side of the second lead-in roller 227 side by side from top to bottom, a sprayer 225 is arranged between the first humidifying roller 224 and the second humidifying roller 226 and right opposite to the front face of the conveyed current collector, the first lead-in roller 223 is arranged above the first humidifying roller 224, and a composite lead-out roller 229 is arranged right below the hot pressing composite area.
In actual operation, the current collector enters the hot-pressing composite device 22 through the first guide roller 223, the unreeled current collector firstly humidifies the back surface of the current collector through the first humidifying roller 224, then carries out front spray humidification through the sprayer 225, then carries out secondary humidification on the back surface of the current collector through the second humidifying roller 226, so that the conductive adhesive layers on the upper surface and the lower surface of the current collector are humidified and softened, and then conveyed into the preheating bellows 228 to be preheated, the conductive adhesive layers on the upper surface and the lower surface of the current collector are further softened, and the viscosity of the conductive adhesive layers is activated in advance before contacting with the electrode film.
According to the invention, through the structural design of the hot-pressing compounding device 22, the first humidifying roller 224, the second humidifying roller 226 and the sprayer 225 are arranged to respectively humidify the front surface and the back surface of the current collector, so that the conductive adhesive layers on the upper surface and the lower surface of the current collector are humidified and softened, then through the arrangement of the preheating bellows 228, the humidified current collector is preheated through the preheating bellows 228, so that the conductive adhesive layers on the upper surface and the lower surface of the current collector are further softened, the viscosity of the conductive adhesive layers is activated in advance before the current collector contacts with an electrode film, and finally the current collector and the electrode film are subjected to double-sided hot-pressing compounding in a hot-pressing compounding region of the hot-pressing compounding pair roller 222, so that a compact current collector compound is formed, and the compounding strength between the current collector and the electrode film is greatly improved.
And two electrode film unreeling devices 23 which are arranged on the hot press frame 221 and symmetrically distributed relative to the hot press compounding device 22, wherein the electrode film unreeling devices 23 are used for smoothly unreeling and conveying the electrode film into the hot press compounding pair roller 222 to be hot press compounded with a current collector. The electrode film unreeling device 23 comprises an electrode film unreeling roller 231, one side of the electrode film unreeling roller 231 is provided with an electrode film unreeling first guide roller 233, the rear of the electrode film unreeling first guide roller 233 is provided with an electrode film unreeling deviation correcting roller 234, an electrode film unreeling tension adjusting roller 235, a fifth guide roller 236 and a sixth guide roller 239 in sequence along the electrode film unreeling direction, wherein the electrode film unreeling tension adjusting roller 235 is arranged on an electrode film unreeling tension adjusting swing arm 237, an electrode film unreeling tension adjusting cylinder 238 is arranged on a hot-pressing frame 221 and connected with one end of the electrode film unreeling tension adjusting swing arm 237, the sixth guide roller 239 is located above the hot-pressing compound counter roller 222, and the electrode film unreeling second guide roller 232 is arranged between the sixth guide roller 239 and the hot-pressing compound counter roller 222. In actual operation, the electrode film roll is placed on the electrode film unreeling roller 231, unreels at a constant speed through the electrode film unreeling roller 231, and after deviation correction and tension adjustment of the electrode film unreeling deviation correcting roller 234 and the electrode film unreeling tension adjusting roller 235, the electrode film roll stably enters the hot-press compounding pair roller 222 to be hot-press compounded with a current collector.
And the winding device 24 is arranged at the rear side of the hot-pressing compounding device 22, and the winding device 24 is used for winding the finished product subjected to hot-pressing compounding. The winding device 24 includes a winding frame 241, and a winding lead-in roller 242, a seventh guide roller 243, a winding tension adjusting roller 244, an eighth guide roller 245, a ninth guide roller 246, a tenth guide roller 248, a winding lead-out roller 249 and a winding roller 2410 are sequentially installed on the winding frame 241 along the winding direction. In actual operation, the current collector composite after hot-pressing and compounding is stably wound by the winding roller 2410 after passing through the winding roller 242, the seventh guide roller 243, the winding tension adjusting roller 244, the eighth guide roller 245, the ninth guide roller 246, the tenth guide roller 248 and the winding roller 249 in sequence. A winding tension detector 247 is arranged between the ninth guide roller 246 and the tenth guide roller 248, and winding tension can be monitored on line in real time through the winding tension detector 247, so that winding speed can be controlled better, and winding quality can be improved.
The invention adopts an independent segmentation process for electrode film forming and current collector compounding, the production of the electrode film is independent and controllable, the quality control of the electrode film is convenient, the electrode film can be matched with a subsequent current collector compounding device 2, the compounding efficiency and quality of the current collector and the electrode film are improved by adopting an independent unreeling and double-sided hot-pressing compounding process of the electrode film, and the adhesive layer on the surface of the current collector can be softened by wetting and preheating the front surface and aspects of the current collector before hot-pressing compounding, so that the compounding strength between the current collector and the electrode film is improved. During actual operation, after the raw materials for producing the electrode film are successfully proportioned, the raw materials are added into a mixing conveying mechanism, conveyed into a film forming mechanism through the mixing conveying mechanism, rolled into a film, then heated and shaped through a shaping box 19, then trimmed, conveyed to a thinning mechanism after trimming to accurately thin the electrode film, so that the thickness of the electrode film meets the process requirements, and then trimmed and rolled for subsequent current collector compounding for standby. The rolled current collector is placed in the current collector unreeling device 21, and is smoothly unreeled and conveyed backwards through the current collector unreeling device 21, the current collector enters the hot-pressing compounding device 22 through the first guide-in roller 223, the unreeled current collector firstly wets the back surface of the current collector through the first humidifying roller 224, then the front surface of the current collector is subjected to spray humidification through the sprayer 225, then the back surface of the current collector is subjected to secondary humidification through the second humidifying roller 226, so that the conductive adhesive layers on the upper surface and the lower surface of the current collector are humidified and softened, and then the current collector is conveyed into the preheating bellows 228 for preheating, so that the conductive adhesive layers on the upper surface and the lower surface of the current collector are further softened, the viscosity of the conductive adhesive layers is activated in advance before the current collector contacts with the electrode films, meanwhile, the electrode films produced by the electrode film unreeling device 23 which are symmetrically distributed on the hot-pressing compounding counter roller 222 are unreeled through the first humidifying roller 221, the electrode films produced by the electrode film forming device 1 are combined with the humidified current collector through the hot-pressing compounding region of the hot-pressing compounding counter roller 222, a compact current collector composite body is formed, and then the compact current collector composite body is exported through the hot-pressing compounding roller 24, and the finished product winding composite product is finally obtained.
Peel strength test
Test instrument: wenzhou three and measuring instruments limited SBL-90 peel force test machine.
The testing method comprises the following steps: the adhesive tape is peeled off, 3-5 layers outside the adhesive tape are cut off, the adhesive tape is uniformly peeled off, the adhesive tape is adhered to one end of a tested pole piece, the included angle between the adhesive tape and the pole piece is larger than 30 degrees, a polyester film with the length of about 200mm and the width of 40mm is placed below the other end of the pole piece, then a sample is rolled back and forth for 3 times at the speed of about 120mm/s under the dead weight by using a wheel of a rolling device, the free end of the sample is folded through 180 degrees, the adhesive surface is peeled off by about 10mm, the pole piece is clamped on a lower clamp, and the free end of the sample is clamped on an upper clamp. The stripping surface is kept consistent with the tester force line. The tester continuously peeled at a falling rate of 300.+ -.10 mm/min. The effective peel adhesion length was about 100mm and there were automated technical means to give peel strength and peel force data.
The above test experiments were each averaged after 5 times. The experimental results of comparative example 1 (the product obtained by directly compounding the current collector and the electrode film in the hot-press compounding zone of the hot-press compounding counter roller without humidification and preheating treatment) of the current collector composite finished product prepared in example 1 of the present invention are shown in table 1:
TABLE 1 peel strength test results
| 1 | 2 | 3 | 4 | 5 | average/N/m | |
| This embodiment | 0.18 | 0.19 | 0.19 | 0.19 | 0.20 | 0.19 |
| Comparative example 1 | 0.13 | 0.13 | 0.12 | 0.13 | 0.13 | 0.13 |
From the test results, it can be seen that the peeling strength between the electrode film and the current collector is 0.13N/m, and the peeling strength between the electrode film and the current collector is 0.19N/m, which is improved by 38%. The experimental results can clearly show that the electrode film and the current collector are correspondingly humidified and preheated between the hot-pressing compounding, and the compounding strength between the current collector and the electrode film can be greatly improved.
The foregoing is a preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, so that the equivalents and modifications can be made without departing from the spirit of the disclosure.
Claims (10)
1. An automated production line for preparing a dry electrode of a power battery is characterized by comprising the following steps:
the electrode film forming device comprises a film forming frame, wherein a material mixing conveying mechanism is arranged on the film forming frame, a film forming mechanism is arranged behind the material mixing conveying mechanism, the material mixing conveying mechanism is used for conveying ingredients into the film forming mechanism after metering and mixing, a shaping box is arranged at an outlet of the film forming mechanism, and a first electrode film conveying guide roller, a first trimming mechanism, a second electrode film tension swing roller, a first electrode film deviation correcting roller, a second electrode film conveying guide roller, a thinning mechanism, a third electrode film conveying guide roller, a second trimming mechanism, a second electrode film tension swing roller, a second electrode film deviation correcting roller and an electrode film winding roller are sequentially arranged behind the shaping box according to the electrode film conveying direction;
The current collector composite device comprises a current collector unreeling device, wherein the current collector unreeling device is used for smoothly unreeling and conveying a reeled current collector backwards; the hot-pressing compound device comprises a hot-pressing rack, a pair of hot-pressing compound paired rollers which are transversely attached to each other are arranged on the hot-pressing rack, a hot-pressing compound area is formed in a paired roller attaching area of the hot-pressing compound paired rollers, a preheating bellows is arranged right above the hot-pressing compound area on the hot-pressing rack, a second import roller is arranged right above the preheating bellows, a first humidifying roller and a second humidifying roller are arranged on one side of the second import roller side by side up and down, a sprayer is arranged between the first humidifying roller and the second humidifying roller and is right opposite to the front face of a conveyed current collector, the first import roller is arranged above the first humidifying roller, and a compound export roller is arranged right below the hot-pressing compound area; the electrode film unreeling devices are arranged on the hot-pressing frame and symmetrically distributed relative to the hot-pressing compounding device, and are used for smoothly unreeling the electrode film produced by the electrode film forming device and conveying the electrode film to the hot-pressing compounding pair roller to be hot-pressed and compounded with the current collector; and the winding device is arranged at the rear side of the hot-pressing compounding device and is used for winding the finished product subjected to hot-pressing compounding.
2. The automated production line for dry electrode preparation of power cells according to claim 1, wherein the material mixing and conveying mechanism comprises a feeding hopper installed on a film forming frame, a metering pump is installed at a discharge port of the feeding hopper, a spiral mixer is installed at a discharge port of the metering pump, a material falling hopper is installed at a tail end discharge of the spiral mixer, and the material falling hopper is located right above the film forming mechanism.
3. The automated production line for dry electrode preparation of a power battery according to claim 2, wherein the film forming mechanism comprises a film forming pressure adjusting cylinder, a film forming pressure cleaning roller, a film forming press roller, a film forming roller and a film forming cleaning roller, the film forming press roller and the film forming roller are horizontally and closely mounted on a film forming frame, the film forming cleaning roller is horizontally and closely mounted on the right side of the film forming roller and is closely mounted with the film forming roller, the film forming pressure cleaning roller is mounted on the left side of the film forming press roller and is closely mounted with the film forming press roller, and the film forming pressure adjusting cylinder is horizontally mounted on the film forming frame and is connected with the film forming pressure cleaning roller.
4. The automated production line for dry electrode preparation of a power cell according to claim 1, wherein the first trimming mechanism comprises a first trimming support roller and a first trimming blade, the first trimming blade being mounted above the first trimming support roller; the second side cut mechanism includes second side cut backing roll and second side cut sword, the second side cut sword is installed in the top of second side cut backing roll.
5. The automated production line for dry electrode preparation of a power battery according to claim 1, wherein the thinning mechanism comprises a thinning rack, a thinning press roller and a thinning roller are mounted on the thinning rack in a vertically and closely attached mode, a thinning cleaning roller is mounted below the thinning roller and is arranged in a closely attached mode with the thinning roller, a thinning pressure cleaning roller is mounted above the thinning press roller and is arranged in a closely attached mode with the thinning press roller, and a thinning pressure adjusting cylinder is mounted on the top of the thinning rack and is vertically and downwardly connected with the thinning pressure cleaning roller.
6. The automated dry electrode preparation line for power cells according to claim 1, wherein the current collector unwinding device comprises an unwinding frame, a current collector unwinding roller is mounted on the unwinding frame, a current collector unwinding first guide roller is mounted at the rear of the current collector unwinding roller, an unwinding tension detector is mounted at the rear of the current collector unwinding first guide roller, a first guide roller and a second guide roller are mounted at the rear of the unwinding tension detector, a current collector unwinding tension adjusting swing roller is mounted at the rear of the second guide roller, a current collector unwinding tension adjusting swing roller is mounted on a current collector unwinding tension adjusting swing arm, a current collector unwinding tension adjusting cylinder is mounted on the unwinding frame and connected with the current collector unwinding tension adjusting swing arm, a third guide roller is mounted at the rear of the current collector unwinding tension adjusting swing roller, an unwinding compression roller is mounted at the rear of the third guide roller, an unwinding compression roller is mounted at one side of the unwinding roller, a compression roller is mounted on the compression roller, a compression roller is mounted at the rear of the fourth guide roller, and is connected with the fourth guide roller.
7. The automated dry electrode preparation line for a power battery according to claim 6, wherein a current collector unreeling deviation rectifying device is installed between the unreeling roller and the fourth guide roller, the current collector unreeling deviation rectifying device comprises a current collector unreeling deviation rectifying roller, the current collector unreeling deviation rectifying roller is installed between the unreeling roller and the fourth guide roller, the current collector unreeling deviation rectifying roller is installed on a deviation rectifying swing arm, and a deviation rectifying cylinder is installed on the unreeling rack and connected with the deviation rectifying swing arm.
8. The automatic production line for dry electrode preparation of power battery according to claim 1, wherein the electrode film unreeling device comprises an electrode film unreeling roller, a first electrode film unreeling guide roller is installed on one side of the electrode film unreeling roller, an electrode film unreeling deviation correcting roller, an electrode film unreeling tension adjusting roller, a fifth guide roller and a sixth guide roller are sequentially installed at the rear of the first electrode film unreeling guide roller along the electrode film unreeling direction, wherein the electrode film unreeling tension adjusting roller is installed on an electrode film unreeling tension adjusting swing arm, the electrode film unreeling tension adjusting cylinder is installed on a hot-pressing frame and is connected with one end of the electrode film unreeling tension adjusting swing arm, and the sixth guide roller is located above the hot-pressing composite counter roller.
9. The automated production line for dry electrode preparation of a power battery according to claim 1, wherein the winding device comprises a winding frame, and a winding lead-in roller, a seventh guide roller, a winding tension adjusting roller, an eighth guide roller, a ninth guide roller, a tenth guide roller, a winding lead-out roller and a winding roller are sequentially installed on the winding frame along a winding direction.
10. The automated production line for dry electrode preparation of a power cell according to claim 9, wherein a winding tension detector is installed between the ninth and tenth guide rollers.
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| CN202310808866.4A CN116682929B (en) | 2023-07-04 | 2023-07-04 | Automatic production line for dry electrode preparation of power battery |
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| CN202310808866.4A CN116682929B (en) | 2023-07-04 | 2023-07-04 | Automatic production line for dry electrode preparation of power battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023000600A1 (en) * | 2021-07-19 | 2023-01-26 | 浙江大学台州研究院 | Thin film laminating machine |
| CN216084935U (en) * | 2021-10-08 | 2022-03-18 | 蜂巢能源科技有限公司 | Dry electrode pole piece film rolling device and dry electrode pole piece rolling system |
| KR20230078293A (en) * | 2021-11-26 | 2023-06-02 | 주식회사 엘지에너지솔루션 | An electrode sheet calendering apparatus and a dry electrode manufacturing apparatus comprising the calendering apparatus |
| CN217373135U (en) * | 2021-12-30 | 2022-09-06 | 河南壮凌智能设备有限公司 | Hydrogen fuel cell coating device |
| CN115148947A (en) * | 2022-08-08 | 2022-10-04 | 惠州市赢合科技有限公司 | Production system and production method for dry coating pressed pole piece |
| CN219144219U (en) * | 2022-12-28 | 2023-06-06 | 蜂巢能源科技股份有限公司 | Electrode diaphragm processingequipment and pole piece processing equipment |
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| 全自动锂电池卷绕机的设计;杨振宇;何佳兵;姜无疾;;电子工业专用设备;20110720(第07期);全文 * |
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| Publication number | Publication date |
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| CN116682929A (en) | 2023-09-01 |
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