CN107039629B - High-speed forming machine for electrode slice multipolar lug - Google Patents
High-speed forming machine for electrode slice multipolar lug Download PDFInfo
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- CN107039629B CN107039629B CN201611248941.2A CN201611248941A CN107039629B CN 107039629 B CN107039629 B CN 107039629B CN 201611248941 A CN201611248941 A CN 201611248941A CN 107039629 B CN107039629 B CN 107039629B
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- 238000005520 cutting process Methods 0.000 claims abstract description 158
- 230000007246 mechanism Effects 0.000 claims abstract description 90
- 238000003860 storage Methods 0.000 claims abstract description 65
- 230000000007 visual effect Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 23
- 238000000465 moulding Methods 0.000 claims description 17
- 230000005405 multipole Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 6
- 230000001174 ascending effect Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 12
- 238000012797 qualification Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 16
- 230000006872 improvement Effects 0.000 description 13
- 230000001133 acceleration Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention belongs to the technical field of battery production equipment, and particularly relates to an electrode plate multi-lug high-speed forming machine which comprises an unreeling mechanism, a first storage mechanism, a die cutting mechanism, a traction mechanism, a visual detection mechanism, a second storage mechanism and a reeling mechanism which are sequentially arranged, wherein the die cutting mechanism comprises a first die cutting knife set and a second die cutting knife set, the first die cutting knife set and the second die cutting knife set are sequentially arranged in the electrode plate travelling direction, and the die cutting mechanism further comprises a compensation device for compensating the electrode plate variable spacing. Compared with the prior art, the invention realizes one-step forming of two groups of lugs on the premise of guaranteeing the service life of the die cutter by improving the die cutter group and the die cutting control method, effectively improves the die cutting efficiency and can realize the production speed of 40-50 m/min; and the forming precision of the lug is high by arranging the compensation device and the visual detection mechanism, so that the product qualification rate is effectively improved.
Description
Technical Field
The invention belongs to the technical field of battery production equipment, and particularly relates to a high-speed forming machine for electrode plate multipolar lugs.
Background
In recent years, the application of lithium ion batteries is more and more extensive, and the development of lithium ion batteries is promoted by the huge market demand. The battery tabs need to be aligned after the pole pieces are wound so as to weld the tabs together later, however, the lengths of the pole pieces at the inner layer and the outer layer of the battery are different, different distances are needed between the tabs to meet the superposition requirement, and therefore the forming equipment of the tabs needs to be compatible with the tab design with variable distances.
The tab forming can be achieved by welding lead tabs or cutting pole pieces, and in the above manner, the welding tabs easily cause cold welding, have relatively low stability and reliability, and are not suitable for batteries with high-rate discharge requirements, such as power batteries of electric automobiles. However, in the process of obtaining the multi-lug molding by cutting the electrode plate, because the aluminum foil and the copper foil electrode plates are continuous thin plates, the quick and efficient realization of the variable-spacing double-sided lug molding is a very troublesome problem, and the conventional lug molding mode of the lithium battery factory at present adopts two modes of online die cutting molding by adopting a cutting die and online laser cutting molding. Because the energy density of laser online cutting forming is extremely high and the pole piece is extremely easy to damage, more cutting dies are adopted in the current lithium battery factories for online die cutting forming.
Wherein, the online die cutting forming of the cutting die is divided into fly cutting and static cutting. Fly cutting, namely, synchronously moving the cutting die along with the electrode plate (the cutting die and the electrode plate are relatively static) to carry out die cutting forming; the static cutting finger electrode plate is static in a die cutting time period, and the electrode plate moves in an accelerating way after die cutting is completed. However, the tab die cutting machine adopting the static cutting mode at present has the following obvious defects:
first, the winding and unwinding cannot be kept at a constant speed. When the existing die cutting machine is used for static die cutting, winding and unwinding are stopped at the same time, so that die cutting efficiency is reduced, meanwhile, pole piece tension fluctuation is large, dancing phenomenon can occur, pole piece strips are easy to cause, and die cutting length and width exceed specifications.
Secondly, the die cutting speed is low, and the forming efficiency is low. Although the current static cutting tab forming mode is widely applied to electrode plate multi-tab forming, the current die cutting speed is relatively low, and the actual production speed is less than 25m/min. This is because the pole piece feed speed and the static die cutting time are a pair of contradictions in the static cutting mode. If the production speed is to be increased, the static die cutting time is required to be compressed; however, the static die cutting time is shortened, so that the heating of the cutting die is increased, the abrasion is serious, and the service life of the cutting die is influenced. Therefore, in order to ensure the service life of the cutting die, the die cutting time of the cutting die is mostly set to be more than 0.5s, and the current distance between two adjacent lugs is generally 270-360 mm; assuming a production speed of 25m/min, a feed time of 270-360 mm is required of about 0.14-0.36 s, whereas such a feed acceleration is not achievable at all by the existing motors, so that the current production speed can only be <25m/min.
Thirdly, the die cutting machine has no function of monitoring quality parameters on line. Parameters such as tab spacing, die cutting width, step height and tab height can influence dislocation of the coiled pole piece, and even can influence the safety problem of the battery. At present, the length deviation of each pole piece is less than or equal to +/-3 mm, the step height deviation is less than or equal to 0.5mm, the pole lug height deviation is less than or equal to +/-0.5 mm, and the adjacent pole lug spacing deviation is less than or equal to +/-0.5 mm, namely, the current quality requirements on pole lug forming are very strict. However, the die cutting machine commonly used at present has no online detection system, and the quality after die cutting is detected off-line through manual sample cutting, and each quality parameter is not monitored on line in real time, so that the quality of the electrode plate is affected.
Fourth, there is no real-time device for compensating the lug variable spacing. The prior die cutting machine divides the pole lug with variable spacing to be die-cut into two parts for die-cutting, and when in die-cutting, the pole lug is firstly die-cut into a constant length, namely a fixed length, and then is die-cut into a variable correction length, namely a correction length. Although the lug forming with variable spacing can be realized, the punching method is complex and complex, the punching efficiency is low, and one lug spacing is punched for multiple times, so that the lug spacing error can be greatly increased, and the precision requirement of lug forming can not be met.
In view of the foregoing, it is necessary to further improve the existing tab forming apparatus to overcome the above-mentioned drawbacks, and to achieve efficient and rapid forming of the electrode tab multi-tab while ensuring the accuracy of tab forming.
Disclosure of Invention
The invention aims at: aiming at the defects of complex structure, low forming speed, low efficiency and low forming precision of the existing electrode slice multipolar lug forming machine, the electrode slice multipolar lug forming machine which has simple structure and high forming precision and can realize high-efficiency and rapid forming is provided.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a multipolar ear high-speed forming machine of electrode slice, includes unreeling mechanism, first storage mechanism, cross cutting mechanism, traction mechanism, vision detection mechanism, second storage mechanism and the winding mechanism that sets gradually, cross cutting mechanism includes first die cutter group and second die cutter group, first die cutter group with second die cutter group sets gradually in electrode slice direction of moving belt, cross cutting mechanism is still including the compensation arrangement who is used for compensating the pole ear and becomes the interval.
D 1 The center distance between the first tab and the second tab of the finger electrode slice, D n The center distance between the nth tab and the (n+1) th tab in the electrode sheet is D 1 、D 2 、D 3 ......D N (N is more than or equal to 2), and the difference between adjacent intervals is G, namely D 2 -D 1 ＝G、D 3 -D 2 ＝G、D 4 -D 3 ＝G、......D n -D (n-1) =g; when the multipolar lug forming machine is used for forming the multipolar lug, electricity is generatedThe feeding speed of the pole piece is set as V, and the die cutting action time of the first die cutting knife set and the second die cutting knife set is T 1 The feeding and tape-feeding time is T 2 . Wherein, the common lug spacing range D 1 ～D N The diameter is 270mm to 360mm, and G is generally 1mm to 2mm.
The conventional tab die cutting equipment is generally only provided with a group of cutting dies, and the die cutting of the tabs can be carried out only when the electrode plates are static, so that the conventional die cutting equipment is used for die cutting and forming a group of tabs at one time, the feeding distance is a tab spacing, and the tab spacing D=270 mm and T are assumed 1 In the case of =0.5 s, then a production speed of v=30m/min requires a feed time T 2 Production speed of =0.04 s, and v=20 m/min requires a feed time T 2 <0.3s; the feeding acceleration cannot be realized at all by the existing motor, so that the production speed of the current tab die-cutting machine adopting the static cutting mode can only reach 20-25 m/min at the highest speed, and the production efficiency is relatively low.
The invention is provided with two groups of cutting dies, so that two groups of lugs are formed by die cutting at one time, and the feeding distance is the sum of the distances between two adjacent lugs, namely, the feeding distance is twice that of the conventional die cutting equipment; the current common tab spacing D=270 mm-360 mm, so the feeding distance of the invention is 540-720 mm. Let the feed distance be calculated as 600mm, die cutting time T 1 =0.5 s, at a speed v=45 m/min, then the feed time T 2 =0.3 s. Therefore, under the condition that the cutting die structure is unchanged and the die cutting time is 0.5s, the production speed of more than 40m/min can be achieved; therefore, the die cutting speed and the die cutting efficiency are greatly improved.
The electrode plate to be molded is uniformly unreeled through the unreeling mechanism, the electrode plate is lifted by the first storage mechanism before die cutting, the electrode plate is lowered by the second storage mechanism, the electrode lug variable distance is compensated in real time through the compensation device, the stationary electrode plate is die-cut through the first die cutter set and the second die cutter set, feeding of the electrode plate is accelerated after die cutting is finished, the electrode plate is lowered by the first storage mechanism, the electrode plate is lifted by the second storage mechanism, quality monitoring is carried out on the molded electrode plate through the visual detection mechanism, and uniform reeling is carried out through the reeling mechanism. Wherein the distance of feeding acceleration is equal to the length of uniform motion of winding and unwinding.
As an improvement of the electrode slice multipolar ear high-speed forming machine, the compensation device comprises two positioning rollers and a compensation roller movably arranged between the two positioning rollers, and the compensation device is arranged between the first die cutter group and the second die cutter group. According to the method, the change of the lug distance between two groups of cutting dies is compensated in real time through the compensation roller, wherein the compensation roller can move up and down along the longitudinal direction under the drive of the linear motor. For example, assuming that the distance between the first die cutter set and the second die cutter set is 270mm, the compensation roller may be lowered by 0.5mm to compensate, and actually, 1mm when the first die cutter set performs die cutting.
As an improvement of the electrode slice multi-lug high-speed forming machine, the compensation device comprises a linear motor and a positioning roller, wherein the positioning roller is arranged between the first die-cutting knife set and the second die-cutting knife set, and the linear motor is electrically connected with the second die-cutting knife set so as to drive the second die-cutting knife set to move back and forth along the electrode slice travelling direction. According to the method, the second die cutter group is driven by the linear motor to compensate the change of the lug distance between the two groups of cutter dies in real time. For example, assuming that the distance between the first die cutter set and the second die cutter set is 270mm, the linear motor may drive the second die cutter set to move rightward by 1mm to compensate when the first die cutter set performs die cutting.
As an improvement of the high-speed forming machine for the electrode slice multipole lug, the compensation device also comprises an absolute grating ruler for improving the compensation precision, and the resolution of the absolute grating ruler is preferably 10 mu m. The absolute grating ruler is adopted to enable the linear motor to move the position value to achieve efficient and reliable transmission with diagnosis function; and the current absolute position value of each shaft is immediately obtained without executing reference point zeroing operation when the motor is started or after the motor is restarted after power failure.
As an improvement of the electrode slice multipolar lug high-speed forming machine, the unreeling mechanism comprises an unreeling roller, at least two unreeling guide rollers and an unreeling floating roller which is movably arranged between the unreeling guide rollers; the winding mechanism comprises a winding roller, at least two winding guide rollers and a winding floating roller movably arranged between the winding guide rollers. The unreeling floating roller is used for providing unreeling tension control, and the reeling floating roller is used for providing reeling tension control so as to ensure simultaneous continuous actions of unreeling, die cutting and reeling, and improve die cutting efficiency; meanwhile, the constant tension of the electrode plate in the unreeling, die cutting and reeling processes is ensured, and die cutting errors caused by tension fluctuation are avoided.
As an improvement of the electrode slice multipolar lug high-speed forming machine, the first storage mechanism comprises two first fixed rollers, a first storage roller arranged between the two first fixed rollers and a first lifting mechanism for driving the first storage roller to lift or descend; the second storage mechanism comprises two second fixed rollers, a second storage roller arranged between the two second fixed rollers, and a second lifting mechanism for driving the second storage roller to ascend or descend. The first storage roller and the second storage roller are respectively used for storing the electrode slices, and meanwhile, the die cutting instant electrode slices are ensured to be kept static.
As an improvement of the high-speed forming machine for the electrode slice multipolar lug, the traction mechanism at least comprises two parallel and oppositely arranged driving traction rollers. The active traction roller is used for providing traction power, and meanwhile, the roller moment of inertia which needs to be overcome during feeding acceleration can be reduced, and die cutting errors caused by electrode plate slipping are prevented.
As an improvement of the high-speed forming machine for the electrode slice multipolar lug, the visual detection mechanism at least comprises visual detectors, wherein the number of the visual detectors is at least two, and the visual detectors are respectively arranged at two sides of the electrode slice. The visual detector is used for detecting quality parameters such as lug spacing, step height, die cutting width, lug height and the like in real time; if a certain quality parameter exceeds the specification in the production process, the forming machine can alarm or stop to remind operators and quality inspection staff.
As an improvement of the high-speed forming machine for the electrode slice multipolar lug of the invention, the electric machineThe tape-feeding speed V of the pole piece meets V not less than D 1 /(T 1 +T 2 ) Wherein D is 1 Is the minimum value of the spacing between adjacent lugs, T 1 For the die cutting action time of the first die cutting knife group and the second die cutting knife group, T 2 For feeding the tape time.
As an improvement of the high-speed forming machine for the electrode slice multipolar lug of the invention, the T-shaped electrode slice is provided with a plurality of lugs 1 Not less than 0.5s, D 1 More than or equal to 270mm, preferably 300 to 380mm. When T is 1 And when the temperature is more than or equal to 0.5s, the service life of the die cutter can be ensured.
As an improvement of the electrode slice multipolar lug high-speed forming machine, the rising or falling height H of the first storage roller and the second storage roller meets H=1/2 V×T 1 。
As an improvement of the electrode slice multipolar lug high-speed forming machine, when the first die cutter set and the second die cutter set are used for die cutting, the unreeling mechanism keeps unreeling at a constant speed, and the reeling mechanism keeps reeling at a constant speed.
As an improvement of the electrode slice multi-lug high-speed forming machine, before the first die-cutting knife set and the second die-cutting knife set are used for die-cutting, the first storage roller enables the electrode slice to ascend, the second storage roller enables the electrode slice to descend, and the ascending height of the first storage roller is the same as the descending height of the second storage roller.
As an improvement of the electrode slice multi-lug high-speed forming machine, after die cutting of the first die cutter group and the second die cutter group is completed, the first storage roller descends the electrode slice, the second storage roller ascends the electrode slice, and the descending height of the first storage roller is the same as the ascending height of the second storage roller.
Compared with the prior art, the invention has at least the following beneficial effects:
1) The invention realizes one-step forming of two groups of lugs by improving the die-cutting knife set and the die-cutting control method, effectively improves the die-cutting efficiency and can realize the production speed of 40-50 m/min; at the same time, the time T of each die cutting of the die-cutting knife group can be ensured 1 And the service life of the die-cutting knife is ensured and the requirement of the die-cutting knife is not increased by more than or equal to 0.5 s.
2) According to the invention, through the arrangement of the visual detection mechanism, quality parameters such as the lug spacing, the die cutting width, the step height, the lug height and the like can be monitored and displayed in real time, so that the device is used for guiding production and machine adjustment, and the quality of lug forming is improved.
3) The invention realizes real-time compensation of the lug spacing through the compensation device, meets the requirement of lug spacing change, reduces the lug forming error and improves the qualification rate of products.
4) According to the invention, the electrode plates are stored by the first storage mechanism and the second storage mechanism, tension control is provided by the unreeling floating roller and the reeling floating roller, so that simultaneous continuous actions of unreeling, die cutting and reeling are ensured, and the die cutting efficiency is improved; meanwhile, the constant tension of the electrode plate in the unreeling, die cutting and reeling processes is ensured, and die cutting errors caused by tension fluctuation are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 application and therefore should not be considered limiting the scope, and that 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 view of a structure of an electrode sheet formed by using the tab according to the present invention.
Fig. 2 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
In the figure: 1-unreeling mechanism; 11-unreeling rollers; 12-unreeling a floating roller; 13-unreeling guide rollers; 2-a first storage mechanism; 21-a first storage roll; 22-a first fixed roller; 3-a die cutting mechanism; 31-a first die cutter set; 32-a second die cutter set; 33-compensating means; 331-compensating roller; 332-positioning rollers; 333-linear motor; 4-traction mechanism; 41-active traction roller; 5-visual detection means; 51-visual detector; 6-a second storage mechanism; 61-a second stock roll; 62-a second fixed roller; 7-a winding mechanism; 71-a wind-up roll; 72-rolling a floating roller; 73-winding a guide roller; 8-electrode plates; 81-tab.
Detailed Description
The invention and its advantageous effects will be described in further detail below with reference to specific examples and the accompanying drawings, but the embodiments of the invention are not limited thereto.
Example 1
As shown in fig. 1-2, a high-speed electrode tab forming machine comprises an unreeling mechanism 1, a first storage mechanism 2, a die cutting mechanism 3, a traction mechanism 4, a visual detection mechanism 5, a second storage mechanism 6 and a reeling mechanism 7 which are sequentially arranged, wherein the die cutting mechanism 3 comprises a first die cutter set 31 and a second die cutter set 32, the first die cutter set 31 and the second die cutter set 32 are sequentially arranged in the travelling direction of an electrode tab 8, and the die cutting mechanism 3 further comprises a compensation device 33 for compensating the variable spacing of the electrode tab 81.
The compensating device 33 includes two positioning rollers 332, and a compensating roller 331 movably disposed between the two positioning rollers 332, and the compensating device 33 is disposed between the first and second die cutter sets 31 and 32. The method compensates the distance change of the pole lug 81 between the two groups of cutting dies in real time through the compensation roller 331, wherein the compensation roller 331 can move up and down along the longitudinal direction under the drive of the linear motor 333. For example, assuming that the distance between the first and second die cutter sets 31 and 32 is 270mm, the compensation roller 331 is lowered by 0.5mm to compensate, and actually compensates for 1mm when the first die cutter set 31 performs die cutting.
In this embodiment the compensating device 33 further comprises an absolute grating scale for improving the compensation accuracy, preferably with a resolution of 10 μm. The absolute grating ruler is adopted to enable the linear motor 333 to move the position value, so that efficient, reliable and diagnosis-function transmission is realized; and the current absolute position value of each shaft is immediately obtained without executing reference point zeroing operation when the motor is started or after the motor is restarted after power failure.
In this embodiment, the unreeling mechanism 1 includes an unreeling roller 11, two unreeling guide rollers 13, and an unreeling floating roller 12 movably disposed between the two unreeling guide rollers 13; the winding mechanism 7 comprises a winding roller 71, two winding guide rollers 73 and a winding floating roller 72 movably arranged between the two winding guide rollers 73. The unreeling floating roller 12 is used for providing tension control of unreeling, the reeling floating roller 72 is used for providing tension control of reeling, so that unreeling, die cutting and reeling can be ensured to continuously act at the same time, and die cutting efficiency is improved; meanwhile, the constant tension of the electrode sheet 8 in the unreeling, die cutting and reeling processes is ensured, and die cutting errors caused by tension fluctuation are avoided.
In the present embodiment, the first storing mechanism 2 includes two first fixed rollers 22, a first storing roller 21 provided between the two first fixed rollers 22, and a first elevating mechanism that drives the first storing roller 21 to ascend or descend; the second storing mechanism 6 includes two second fixed rollers 62, a second storing roller 61 provided between the two second fixed rollers 62, and a second elevating mechanism that drives the second storing roller 61 to ascend or descend. The first storage roller 21 and the second storage roller 61 are respectively used for storing the electrode slices 8, and meanwhile, the electrode slices 8 are ensured to be kept stationary at the moment of die cutting.
In this embodiment, the traction mechanism 4 comprises at least two parallel and oppositely disposed active traction rollers 41. The active traction roller 41 is used for providing traction power, and simultaneously can reduce the roller moment of inertia which needs to be overcome when feeding and accelerating, and prevent the electrode plate 8 from slipping to cause large die cutting error.
In the present embodiment, the visual detection mechanism 5 includes at least the visual detectors 51, and the number of the visual detectors 51 is set to at least two, which are respectively provided on both sides of the electrode sheet 8. The visual detector 51 is used for detecting quality parameters such as the spacing of the pole lugs 81, the step height, the die cutting width, the height of the pole lugs 81 and the like in real time; if a certain quality parameter exceeds the specification in the production process, the forming machine can alarm or stop to remind operators and quality inspection staff.
In the present embodiment, the height H of the rising or falling of the first and second stock rolls 21 and 61 satisfies h=1/2 v×t 1 The method comprises the steps of carrying out a first treatment on the surface of the While the tape speed V of the electrode sheet 8 satisfies V.gtoreq.D 1 /(T 1 +T 2 ) Wherein D is 1 Between adjacent lugs 81Minimum value of spacing, T 1 Is the die cutting action time, T, of the first die cutter set 31 and the second die cutter set 32 2 For feeding the tape time. Wherein, in order to ensure the service life of the die cutter, T in the embodiment 1 ≥0.5s，D 1 ≥270mm，D 1 Preferably 300 to 380mm.
In this embodiment, the unreeling mechanism 1 keeps unreeling at a constant speed and the reeling mechanism 7 keeps reeling at a constant speed while the first die cutter set 31 and the second die cutter set 32 die cut.
In this embodiment, before the die cutting is performed by the first die cutter set 31 and the second die cutter set 32, the first storage roller 21 lifts the electrode sheet 8, the second storage roller 61 lowers the electrode sheet 8, and the lifting height of the first storage roller 21 is the same as the lowering height of the second storage roller 61; after the die cutting of the first and second die cutter sets 31 and 32 is completed, the first storage roller 21 descends the electrode sheet 8, the second storage roller 61 ascends the electrode sheet 8, and the descending height of the first storage roller 21 is the same as the ascending height of the second storage roller 61.
For ease of description, the following definitions are first given: as shown in fig. 1, the number of tabs 81 to be formed on each side of the electrode sheet 8 is N; the distance between the adjacent lugs 81 is D, D 1 Center distance D between first tab 81 and second tab 81 of finger electrode sheet 8 n The center distance between the nth tab 81 and the (n+1) th tab 81 in the electrode sheet 8, that is, the distance between the tabs 81 is sequentially D 1 、D 2 、D 3 ......D N (N is more than or equal to 2), and the difference between adjacent intervals is G, namely D 2 -D 1 ＝G、D 3 -D 2 ＝G、D 4 -D 3 ＝G、......D n -D (n-1) =g; wherein, the distance range D of the common tab 81 1 ～D N The diameter is 270mm to 360mm, and G is generally 1mm to 2mm.
The conventional die cutting equipment for the tab 81 is generally provided with only one group of cutting dies, and the die cutting of the tab 81 can be performed only when the electrode sheet 8 is stationary, so that the conventional die cutting equipment is used for die cutting and forming one group of tab 81 at one time, the feeding distance is the distance between the tabs 81, and the distance D=270 mm and T between the tabs 81 are assumed 1 The condition of =0.5 sIn the case of a production speed of v=30 m/min, then a feed time T is required 2 Production speed of =0.04 s, and v=20 m/min requires a feed time T 2 <0.3s; the feeding acceleration cannot be realized at all by the existing motor, so that the production speed of the current tab 81 die cutting machine adopting the static cutting mode can only reach 20-25 m/min at the highest speed, and the production efficiency is relatively low.
The invention is provided with two groups of cutting dies, so that two groups of lugs 81 are molded at one time by die cutting, and the feeding distance is the sum of the distances between two adjacent lugs 81, namely, the feeding distance is twice that of the conventional die cutting equipment; the distance D=270 mm-360 mm between the tabs 81 which are commonly arranged at present, so that the feeding distance of the invention is 540-720 mm. Let the feed distance be calculated as 600mm, die cutting time T 1 =0.5 s, at a speed v=45 m/min, then the feed time T 2 =0.3 s. Therefore, under the condition that the cutting die structure is unchanged and the die cutting time is 0.5s, the production speed of more than 40m/min can be achieved; therefore, the die cutting speed and the die cutting efficiency are greatly improved.
The electrode plate 8 to be molded is uniformly unreeled through the unreeling mechanism 1, the first storage mechanism 2 enables the electrode plate 8 to ascend before die cutting, the second storage mechanism 6 enables the electrode plate 8 to descend, the variable spacing of the electrode lugs 81 is compensated in real time through the compensation device 33, then the first die cutter set 31 and the second die cutter set 32 die-cut the electrode plate 8 which is static, after die cutting is finished, the electrode plate 8 is fed and accelerated, the first storage mechanism 2 enables the electrode plate 8 to descend, the second storage mechanism 6 enables the electrode plate 8 to ascend, the molded electrode plate 8 is subjected to quality monitoring through the visual detection mechanism 5, and uniform rolling is performed through the rolling mechanism 7. Wherein the distance of feeding acceleration is equal to the length of uniform motion of winding and unwinding.
Example two
As shown in fig. 3, unlike the first embodiment, the compensation device 33 of the present embodiment includes a linear motor 333 and a positioning roller 332, the positioning roller 332 is disposed between the first die cutter set 31 and the second die cutter set 32, and the linear motor 333 is electrically connected to the second die cutter set 32 to drive the second die cutter set 32 to move back and forth along the feeding direction of the electrode sheet 8. The method is general
The second die cutter set 32 is driven by the linear motor 333 to compensate for the change of the distance between the tabs 81 between the two sets of dies in real time. For example, assuming that the distance between the first and second die cutter sets 31 and 32 is 270mm, the linear motor 333 drives the second die cutter set 32 to move rightward by 1mm to compensate when the first die cutter set 31 performs die cutting.
Other structures are the same as those of the first embodiment, and will not be described here again.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (13)
1. The utility model provides a multipolar ear high-speed make-up machine of electrode slice which characterized in that: including unreeling mechanism, first storage mechanism, cross cutting mechanism, traction mechanism, vision detection mechanism, second storage mechanism and the winding mechanism that set gradually, cross cutting mechanism includes first die cutter group and second die cutter group, first die cutter group with the second die cutter group sets gradually on electrode slice tape running direction, cross cutting mechanism is still including the compensation arrangement who is used for compensating the tab and becomes the interval, compensation arrangement includes two positioning rollers, linear motor and activity set up in two compensation rollers between the positioning rollers, just compensation arrangement sets up first die cutter group with between the second die cutter group, the compensation roller is in under linear motor's drive, can follow vertical reciprocate.
2. The electrode tab multipole high speed molding machine of claim 1, wherein: the positioning roller is arranged between the first die-cutting knife set and the second die-cutting knife set, and the linear motor is electrically connected with the second die-cutting knife set.
3. The electrode tab multipole ear high speed molding machine of claim 1 or 2, characterized in that: the compensation device also comprises an absolute grating ruler for improving compensation precision.
4. The electrode tab multipole high speed molding machine of claim 1, wherein: the unreeling mechanism comprises an unreeling roller, at least two unreeling guide rollers and an unreeling floating roller which is movably arranged between the unreeling guide rollers; the winding mechanism comprises a winding roller, at least two winding guide rollers and a winding floating roller movably arranged between the winding guide rollers.
5. The electrode tab multipole high speed molding machine of claim 1, wherein: the first storage mechanism comprises two first fixed rollers, a first storage roller arranged between the two first fixed rollers, and a first lifting mechanism for driving the first storage roller to rise or fall; the second storage mechanism comprises two second fixed rollers, a second storage roller arranged between the two second fixed rollers, and a second lifting mechanism for driving the second storage roller to ascend or descend.
6. The electrode tab multipole high speed molding machine of claim 1, wherein: the traction mechanism at least comprises two parallel and oppositely arranged driving traction rollers.
7. The electrode tab multipole high speed molding machine of claim 1, wherein: the visual detection mechanism at least comprises visual detectors, the number of the visual detectors is at least two, and the visual detectors are respectively arranged on two sides of the electrode plate.
8. The electrode tab multipole high speed molding machine of claim 5, wherein: the tape feeding speed V of the electrode plate meets V not less thanD 1 /(T 1 +T 2 ) Wherein D is 1 Is the minimum value of the spacing between adjacent lugs, T 1 For the die cutting action time of the first die cutting knife group and the second die cutting knife group, T 2 For feeding the tape time.
9. The electrode tab multipole high speed molding machine of claim 8, wherein: the T is 1 Not less than 0.5s, D 1 ≥270mm。
10. The electrode tab multipole high speed molding machine of claim 8, wherein: the height H of the rising or falling of the first storage roller and the second storage roller satisfies H=1/2 V×T 1 。
11. The electrode tab multipole high speed molding machine of claim 1, wherein: when the first die cutter group and the second die cutter group are used for die cutting, the unreeling mechanism keeps unreeling at a constant speed, and the reeling mechanism keeps reeling at a constant speed.
12. The electrode tab multipole high speed molding machine of claim 5, wherein: before the first die-cutting knife set and the second die-cutting knife set carry out die-cutting, the first storage roller enables the electrode plate to ascend, the second storage roller enables the electrode plate to descend, and the ascending height of the first storage roller is the same as the descending height of the second storage roller.
13. The electrode tab multipole high speed molding machine of claim 12, wherein: after die cutting of the first die cutter group and the second die cutter group is completed, the electrode plate is lowered by the first storage roller, the electrode plate is raised by the second storage roller, and the lowering height of the first storage roller is the same as the raising height of the second storage roller.
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| CN107863486A (en) * | 2017-12-21 | 2018-03-30 | 深圳市舜源自动化科技有限公司 | A kind of eccentric roll-type high speed lug forming machine |
| CN208674259U (en) * | 2018-09-18 | 2019-03-29 | 宁德时代新能源科技股份有限公司 | Pole piece molding machine |
| CN109731622B (en) * | 2018-12-30 | 2022-01-07 | 深圳博华仕科技有限公司 | Electrode printing device and method for microfluidic chip |
| CN111151516B (en) * | 2020-01-10 | 2021-08-17 | 广东利元亨智能装备股份有限公司 | Method and device for improving laser cleaning precision |
| CN112059402B (en) * | 2020-08-24 | 2022-06-03 | 长春理工大学 | Laser in-situ auxiliary single-point diamond fly-cutting device |
| CN114346048B (en) * | 2021-12-22 | 2024-02-20 | 长沙矿冶研究院有限责任公司 | Lithium sheet die cutting equipment and lithium sheet die cutting process |
| CN114975882B (en) * | 2022-05-31 | 2023-07-14 | 蜂巢能源科技股份有限公司 | Control method and device for battery pole piece slicing system and battery pole piece slicing system |
| WO2023237507A1 (en) * | 2022-06-08 | 2023-12-14 | Koenig & Bauer Ag | Machine for producing a product with a dry film applied to a carrier substrate |
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