CN113300003A - Lithium ion battery synchronous laminating diaphragm cutting device and lithium ion battery manufacturing method - Google Patents
Lithium ion battery synchronous laminating diaphragm cutting device and lithium ion battery manufacturing method Download PDFInfo
- Publication number
- CN113300003A CN113300003A CN202110645217.8A CN202110645217A CN113300003A CN 113300003 A CN113300003 A CN 113300003A CN 202110645217 A CN202110645217 A CN 202110645217A CN 113300003 A CN113300003 A CN 113300003A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- synchronizing wheel
- cutting device
- driven
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 74
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 45
- 238000010030 laminating Methods 0.000 title claims abstract description 33
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims description 48
- 238000004804 winding Methods 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 19
- 238000007906 compression Methods 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 8
- 238000002955 isolation Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000011149 active material Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 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
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000002931 mesocarbon microbead Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
- B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
- B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
- B26D1/085—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type for thin material, e.g. for sheets, strips or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/27—Means for performing other operations combined with cutting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium ion battery synchronous laminating diaphragm cutting device and a lithium ion battery manufacturing method. The invention has the characteristics of strong process operability, good quality consistency and high energy density.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to a lithium ion battery synchronous laminating diaphragm cutting device and a lithium ion battery manufacturing method.
Background
The winding process is an important process in the production of the lithium ion battery, and the specific process is that the pole pieces after being cut and cut are rolled into a roll core shape by the rotation of a rolling needle, wherein the roll core shape is wrapped layer by layer, and the normal wrapping modes are a diaphragm, an anode, a diaphragm and a cathode. The specific winding process is shown in fig. 6, 100 is a positive plate unwinding shaft, 200 is a negative plate unwinding shaft, 300-bit separator unwinding shaft, and 400 is a winding needle.
In the winding process, the adopted winding needle is prismatic, elliptical or circular, and the wound positive plate, negative plate and film are flexible strips, so that the phenomena of deviation, poor alignment and the like often exist due to tension control and more wound strips, and the repair rate is high.
Disclosure of Invention
Therefore, in order to solve the above disadvantages, the invention provides a cutting device for a lithium ion battery synchronous lamination diaphragm and a manufacturing method of the lithium ion battery, and the cutting device has the characteristics of strong process operability, good quality consistency and high energy density.
The invention is realized in such a way that a lithium ion battery synchronous laminating diaphragm cutting device is constructed, the device comprises a support plate and a cutting device, a first support is arranged on the left side of the top end of the support plate, an isolating film support roller and a battery pole piece support roller are respectively arranged on the upper side and the lower side in the first support, a second support is arranged in the middle of the top end of the support plate, a support roller and a wind-up roller are arranged on the top of the left side and the right side in the second support, a compression roller is arranged in the middle of the bottom end in the second support, the right end of the second support is provided with the cutting device, the bottom end of the cutting device is fixedly connected with the support plate, the cutting device comprises a support frame, a driving mechanism, a motor and a cutting mechanism, the front end of the support frame is fixedly connected with the driving mechanism, the left side of the front end of the driving mechanism is fixedly connected with the second support, the cutting mechanism is arranged in the support frame, the bottom end of the support frame is fixedly connected with the support plate, the left end of the right side of the driving mechanism is connected with the second support frame, and the front end of the compression roller is connected with a driving mechanism.
Preferably, actuating mechanism includes the protection casing, the initiative synchronizing wheel, the driving gear, driven gear, hold-in range and driven synchronizing wheel, protection casing front end left side and motor fixed connection, the output shaft of motor rear end is connected with initiative synchronizing wheel and driving gear, driving gear bottom and driven gear intermeshing, the initiative synchronizing wheel right side is passed through the hold-in range and is rotated with driven synchronizing wheel and be connected, the protection casing rear end left and right sides respectively with second support and support frame fixed connection, the driven synchronizing wheel rear end is connected with the mechanism of cutting through the axis of rotation.
Preferably, the mechanism of cutting includes the shell, the carousel, the connecting rod, the straight-bar, spacing pipe, blade mounting and cut-off knife, the inside carousel that is provided with of shell, carousel rear end edge department rotates through pivot and connecting rod to be connected, the connecting rod bottom rotates through pivot and spacing pipe to be connected, spacing pipe has been cup jointed at spacing outside middle part, spacing pipe is fixed in the shell bottom end wall, connecting rod bottom and blade mounting fixed connection, blade mounting bottom mounting has the cut-off knife, the shell outside and support frame fixed connection, carousel front end centre of circle department rotates with the same heart through axis of rotation and driven synchronizing wheel.
Preferably, the compression roller is provided with two, and two compression rollers are the setting of piling up from top to bottom, and two compression roller front ends are respectively through connecting axle and driving gear and driven gear concentric rotation.
Preferably, the driving gear and the driven gear are meshed in the vertical position, and the outer diameters of the driving gear and the driven gear are the same.
Preferably, the outer sides of the driving synchronizing wheel and the driven synchronizing wheel are both provided with clamping teeth, and the inner wall of the synchronous belt is meshed with the driving synchronizing wheel and the driven synchronizing wheel.
Preferably, the front side and the rear side of the driving synchronizing wheel and the driven synchronizing wheel are both provided with limiting rings, and the outer diameter of the driving synchronizing wheel is smaller than that of the driven synchronizing wheel.
Preferably, the surface of the straight rod is smooth, and the inner wall of the limiting pipe is attached to the straight rod.
Preferably, the driving gear and the driven gear are both made of gear steel.
Preferably, the connecting rod and the straight rod are made of stainless steel.
Another aspect of the present invention is to provide a method for manufacturing a lithium ion battery using the lithium ion battery synchronous lamination separator cutting device, including the following steps:
s1, preparing the positive plate: taking a strip-shaped positive electrode raw roll and a first isolating film, adopting the synchronous laminating diaphragm cutting device for the lithium ion battery, laminating the first isolating film on the positive electrode raw roll, and cutting according to a preset length to obtain a positive electrode sheet in a first shape;
s2, preparation of the negative plate: taking a coiled strip-shaped negative electrode raw roll and a second isolating film, adopting the lithium ion battery synchronous laminating diaphragm cutting device, laminating the second isolating film on the negative electrode raw roll, and cutting according to a preset length to obtain a negative electrode piece in a second shape;
s3, winding and forming: and (4) winding the positive plate obtained in the step and the negative plate obtained in the step (S2) by using a winding needle according to a mode that the negative electrode wraps the positive electrode to obtain a winding core.
Preferably, the size of the first diaphragm is larger than that of the positive plate, the size of the second diaphragm is larger than that of the negative plate, and the size of the negative plate is larger than that of the positive plate.
The invention has the following advantages:
firstly, the process has strong operability, the device is adopted to cut the bonded diaphragm together to obtain the pole piece, the device can be suitable for a positive pole piece and a negative pole piece, the corresponding diaphragm is bonded while the pole piece is cut, and the operation difficulty of the subsequent winding operation is effectively reduced;
secondly, the quality consistency is good, the device and the method optimize the composite winding mode of the four materials of the positive plate, the diaphragm, the negative plate and the diaphragm into the mode of the positive plate attached with the diaphragm and the positive electrode attached with the diaphragm, avoid the defect of tension adjustment controllability caused by the fact that the diaphragm is too soft, only need to ensure the tension uniformity and the alignment degree of the positive plate and the negative plate to effectively ensure the quality of the winding core, and effectively reduce the repair rate;
thirdly, the energy density is high, the diaphragm is attached to the corresponding pole piece in a pressing mode and is in very tight contact, the traditional mode realizes the attaching and attaching of the diaphragm and the pole piece through tension stretching of the diaphragm, the volume of the winding core has certain fluffiness due to the loose state of the contact of the diaphragm and the pole piece caused by the position deviation or fluctuation of the diaphragm, and after the device and the method are adopted, the fluffiness and the contact space are effectively compressed, so that the volume energy density of the winding core is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the cutting device of the present invention;
FIG. 3 is a sectional view showing the internal structure of the driving mechanism of the present invention;
FIG. 4 is a top sectional view of the active synchronizing wheel structure of the present invention;
FIG. 5 is a sectional view showing the internal structure of the cutting mechanism according to the present invention;
FIG. 6 is a schematic view of a prior art lithium ion battery roll core winding;
wherein: a supporting plate-1, a first bracket-2, an isolating film supporting roller-3, a battery pole piece supporting roller-4, a second bracket-5, a supporting roller-6, a wind-up roller-7, a press roller-8, a cutting device-9, a supporting frame-91, a driving mechanism-92, a motor-93, a cutting mechanism-94, a protective cover-921 and a driving synchronizing wheel-922, the device comprises a driving gear-923, a driven gear-924, a synchronous belt-925, a driven synchronous wheel-926, a shell-941, a rotary disc-942, a connecting rod-943, a straight rod-944, a limiting tube-945, a blade fixing piece-946, a cut-off knife-947, a positive pole piece unwinding shaft-100, a negative pole piece unwinding shaft-200, a diaphragm unwinding shaft-300 and a winding needle-400.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the invention provides a cutting device for a lithium ion battery separator which is synchronously attached by an improvement, comprising a supporting plate 1 and a cutting device 9, wherein a first support 2 is installed on the left side of the top end of the supporting plate 1, a barrier film supporting roller 3 and a battery pole piece supporting roller 4 are respectively installed on the upper side and the lower side inside the first support 2, a second support 5 is installed in the middle of the top end of the supporting plate 1, a supporting roller 6 and a winding roller 7 are installed on the top of the left side and the right side inside the second support 5, a pressing roller 8 is installed in the middle of the bottom end inside the second support 5, the cutting device 9 is installed at the right end of the second support 5, the bottom end of the cutting device 9 is fixedly connected with the supporting plate 1, the two pressing rollers 8 are vertically stacked, the front ends of the two pressing rollers 8 respectively concentrically rotate with a driving gear 923 and a driven gear 924 through a connecting shaft, the driving gear 923 and the driven gear 924 respectively drive the two pressing rollers 8 to rotate, the battery pole pieces are jointed with the isolation film and transmitted by the rotation of the two compression rollers 8.
Referring to fig. 2, the cutting device 9 includes a support frame 91, a driving mechanism 92, a motor 93 and a cutting mechanism 94, the front end of the support frame 91 is fixedly connected to the driving mechanism 92, the left side of the front end of the driving mechanism 92 is fixed with the motor 93, the driving mechanism 92 is driven by the motor 93, the cutting mechanism 94 is installed inside the support frame 91, the bottom end of the support frame 91 is fixedly connected to the support plate 1, the left end of the right side of the driving mechanism 92 is connected to the second support 5, the front end of the pressure roller 8 is connected to the driving mechanism 92, and the pressure roller 8 and the cutting mechanism 94 are driven by the driving mechanism 92.
Referring to fig. 3 and 4, the present invention provides a lithium ion battery separator cutting device with synchronous lamination by improvement, wherein a driving mechanism 92 includes a protective cover 921, a driving synchronizing wheel 922, a driving gear 923, a driven gear 924, a synchronous belt 925 and a driven synchronizing wheel 926, the left side of the front end of the protective cover 921 is fixedly connected to a motor 93, the output shaft of the rear end of the motor 93 is connected to the driving synchronizing wheel 922 and the driving gear 923, the bottom end of the driving gear 923 is engaged with the driven gear 924, the right side of the driving synchronizing wheel 922 is rotatably connected to the driven synchronizing wheel 926 through the synchronous belt 925, the left and right sides of the rear end of the protective cover 921 are respectively fixedly connected to a second support 5 and a support frame 91, the protective cover 921 is fixed, the rear end of the driven synchronizing wheel 926 is connected to a cutting mechanism 94 through a rotating shaft, the cutting mechanism 94 is driven by the driven synchronizing wheel 926, the, and driving gear 923 and driven gear 924 external diameter size are the same, make driving gear 923 and driven gear 924 drive two compression rollers 8 and rotate with the same rotational speed, the initiative synchronizing wheel 922 and the outside of driven synchronizing wheel 926 all are provided with the latch, hold-in range 925 inner wall and initiative synchronizing wheel 922 and the meshing of driven synchronizing wheel 926, make the initiative synchronizing wheel 922 rotate and drive driven synchronizing wheel 926 through the hold-in range 925 and rotate, both sides all are provided with the spacing ring around initiative synchronizing wheel 922 and the driven synchronizing wheel 926, and initiative synchronizing wheel 922 external diameter is less than driven synchronizing wheel 926, make and produce the rotational speed difference between initiative synchronizing wheel 922 and the driven synchronizing wheel 926, slow down the slew velocity of driven synchronizing wheel 926, make after the battery sheet impels the certain distance, cut-off knife 947 does a reciprocating motion, driving gear 923 and driven gear 924 all adopt the gear steel material, hardness is high, difficult wearing and tearing.
Referring to fig. 5, the present invention provides a cutting device for synchronously laminating a lithium ion battery diaphragm by improving, wherein the cutting mechanism 94 includes a housing 941, a turntable 942, a connecting rod 943, a straight rod 944, a limiting tube 945, a blade fixing member 946 and a cutting knife 947, the turntable 942 is disposed inside the housing 941, the rear edge of the turntable 942 is rotatably connected to the connecting rod 943 via a rotating shaft, the bottom end of the connecting rod 943 is rotatably connected to the limiting tube 945 via the rotating shaft, the limiting tube 945 is sleeved in the middle of the outer side of the limiting tube 945, the limiting tube 945 is fixed in the bottom end wall of the housing 941, the bottom end of the connecting rod 943 is fixedly connected to the blade fixing member 946, the cutting knife 947 is fixed to the bottom end of the blade fixing member 946, the outer side of the housing 941 is fixedly connected to a supporting frame 91 to fix the housing 941, the center of the front end of the turntable 942 rotates concentrically with a driven synchronizing wheel 926 via the rotating shaft, the driven synchronizing wheel 926 rotates, the turntable 942, the straight rod 944 is smooth on the surface of the straight rod 944, and the inner wall of the limiting pipe 945 is attached to the straight rod 944 to limit the moving track of the straight rod 944, and the connecting rod 943 and the straight rod 944 are made of stainless steel materials, so that the connecting rod 943 is high in hardness and not prone to rusting.
The invention provides a lithium ion battery synchronous laminating diaphragm cutting device through improvement, and the working principle is as follows;
firstly, before use, the device is fixed on a required plane position, and then the power connection port of the motor 93 is connected with control equipment with an external power supply;
secondly, when the battery pole piece laminating machine is used, the battery pole piece roll and the isolation film supporting roll 3 are respectively arranged on the outer sides of the isolation film supporting roll 3 and the battery pole piece supporting roll 4, then the battery pole piece and the laminating isolation film penetrate between the two compression rollers 8, the battery pole piece and the laminating isolation film are compressed through the two compression rollers 8, and the laminating isolation film is laminated on the battery pole piece;
thirdly, the motor 93 is controlled to generate power to drive the driving gear 923 and the driven gear 924 to rotate simultaneously through the output shaft, the driving gear 923 drives the driven gear 924 at the bottom to rotate, two compression rollers 8 are arranged, the two compression rollers 8 are stacked up and down, the front ends of the two compression rollers 8 concentrically rotate with the driving gear 923 and the driven gear 924 through connecting shafts respectively, the two compression rollers 8 are driven to rotate through the driving gear 923 and the driven gear 924 respectively, the battery pole pieces are laminated with an isolating membrane and transmitted through the rotation of the two compression rollers 8, and the battery pole pieces are wound through the rotation of the winding roller 7;
fourthly, the driving synchronizing wheel 922 rotates to drive the driven synchronizing wheel 926 to rotate through the synchronous belt 925, the circle center of the driven synchronizing wheel 926 drives the circle center of the rotating disc 942 to rotate through the rotating shaft, the rotating disc 942 drives the top end of the connecting rod 943 to revolve around the circle center of the rotating disc 942 through the rotating shaft, the surface of the straight rod 944 is smooth, the inner wall of the limiting tube 945 is attached to the straight rod 944 to limit the moving track of the straight rod 944, the connecting rod 943 drives the straight rod 944 to reciprocate up and down, the straight rod 944 drives the blade fixing member 946 and the cutting knife 947 to reciprocate up and down, because the outer diameter of the driving synchronizing wheel 922 is smaller than that of the driven synchronizing wheel 926, a rotating speed difference is generated between the driving synchronizing wheel 922 and the driven synchronizing wheel 926, the rotating speed of the driven synchronizing wheel 926 is reduced, after the battery pole piece is pushed for a certain distance, the cutting knife 947 does one reciprocating motion to cut the battery pole piece, the pressure roller 8 and the cutting mechanism 94 are synchronously driven through the driving mechanism 92, the transmission stability of the battery pole pieces is guaranteed, the driving mechanism 92 is driven by the motor 93, the number of driving devices is small, and the production cost of the device is greatly reduced.
The invention provides a lithium ion battery synchronous laminating diaphragm cutting device through improvement, a press roller 8 is arranged on a support frame 1, a cutting device 9 is arranged, a driving mechanism 92 is arranged at the front end of the cutting device 9, the left side and the right side of the rear end of the driving mechanism 92 are respectively connected with a press roller 8 and a cutting mechanism 94 of the cutting mechanism 9, the pressing roller 8 and the cutting mechanism 94 are driven simultaneously, the battery pole pieces are attached with the isolating film and transmitted through the rotation of the pressing roller 8, and are cut through the reciprocating movement of the cutter 947 of the cutting mechanism 94, meanwhile, the battery pole piece is jointed with the isolation film and cut, the compression roller 8 and the cutting mechanism 94 are synchronously driven by the driving mechanism 92, the transmission stability of the battery pole piece is ensured, and the driving mechanism 92 is driven by one motor 93, so that the number of driving devices is small, and the production cost of the device is greatly reduced.
Example 2
Another aspect of the present invention is to provide a method for manufacturing a lithium ion battery using the lithium ion battery synchronous lamination separator cutting device, including the following steps:
s1, preparing the positive plate: taking a strip-shaped positive electrode raw roll and a first isolating film, adopting the synchronous laminating diaphragm cutting device for the lithium ion battery, laminating the first isolating film on the positive electrode raw roll, and cutting according to a preset length to obtain a positive electrode sheet in a first shape;
s2, preparation of the negative plate: taking a coiled strip-shaped negative electrode raw roll and a second isolating film, adopting the lithium ion battery synchronous laminating diaphragm cutting device, laminating the second isolating film on the negative electrode raw roll, and cutting according to a preset length to obtain a negative electrode piece in a second shape;
s3, winding and forming: and (4) winding the positive plate obtained in the step and the negative plate obtained in the step (S2) by using a winding needle according to a mode that the negative electrode wraps the positive electrode to obtain a winding core.
In this embodiment, the size of the first separator is larger than that of the positive electrode sheet, the size of the second separator is larger than that of the negative electrode sheet, and the size of the negative electrode sheet is larger than that of the positive electrode sheet. The size is set mainly based on the consideration of installation, the size of the negative electrode is larger than that of the positive electrode, negative electrode allowance is formed, sufficient lithium ion storage space is provided, and fire disasters caused by spontaneous combustion due to precipitation of lithium ions are avoided; the size of the diaphragm is larger than that of the corresponding pole piece, so that the diaphragm is effectively insulated and short circuit caused by contact of the positive pole piece and the negative pole piece is avoided.
In this embodiment, the first separator and the second separator are both of the same type or different types of separators, such as a PP separator, a PE separator, a PP/PE composite separator, a coating separator, and the like, and if the coating separator is selected, the coating separator is attached to the positive plate.
On the roll core type, a square roll core or a cylindrical roll core can be formed, and a square lithium ion battery or a cylindrical lithium ion battery is finally prepared, wherein the shell of the square lithium ion battery can be an aluminum shell or an aluminum-plastic film and is cylindrical; the shell of the cylindrical lithium ion battery is a cylindrical steel shell.
In the roll core, the active material of the positive electrode can be lithium iron phosphate, lithium manganate, lithium cobaltate or a ternary material, and the active material of the negative electrode can be natural graphite, artificial graphite, mesocarbon microbeads, a silicon-carbon negative electrode material or an alloy negative electrode material.
In order to verify the technical effect of the invention, the device and the method are adopted to carry out batch production practice on the cylindrical 18650 lithium iron phosphate battery, and in the batch production practice, compared with the traditional method, the device and the method are adopted, the production working hours are saved by 5-8%, the winding repair rate is reduced to be within 2% from the previous 7%, the black core phenomenon of the winding core is greatly reduced, the rate of the winding core entering the shell is 99%, and the design capacity in the volume has a lifting space of 3-5%.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A lithium ion battery synchronous laminating diaphragm cutting device comprises a supporting plate (1), wherein a first support (2) is installed on the left side of the top end of the supporting plate (1), an isolating membrane supporting roller (3) and a battery pole piece supporting roller (4) are installed on the upper side and the lower side inside the first support (2) respectively, a second support (5) is installed in the middle of the top end of the supporting plate (1), a supporting roller (6) and a winding roller (7) are installed on the tops of the left side and the right side of the inner side of the second support (5), and a pressing roller (8) is installed in the middle of the bottom end of the inner side of the second support (5);
the method is characterized in that: second support (5) right-hand member is provided with cutting device (9), and cutting device (9) bottom and backup pad (1) fixed connection, cutting device (9) include support frame (91), actuating mechanism (92), motor (93) and cut mechanism (94), support frame (91) front end and actuating mechanism (92) fixed connection, actuating mechanism (92) front end left side is fixed with motor (93), support frame (91) internally mounted has cuts mechanism (94), support frame (91) bottom and backup pad (1) fixed connection, actuating mechanism (92) right side left end is connected with second support (5), and compression roller (8) front end is connected with actuating mechanism (92).
2. The lithium ion battery synchronous laminating separator cutting device of claim 1, characterized in that: actuating mechanism (92) are including protection casing (921), initiative synchronizing wheel (922), driving gear (923), driven gear (924), hold-in range (925) and driven synchronizing wheel (926), protection casing (921) front end left side and motor (93) fixed connection, the output shaft of motor (93) rear end is connected with initiative synchronizing wheel (922) and driving gear (923), driving gear (923) bottom and driven gear (924) intermeshing, hold-in range (925) and driven synchronizing wheel (926) rotation are passed through on initiative synchronizing wheel (922) right side and are connected, protection casing (921) rear end left and right sides respectively with second support (5) and support frame (91) fixed connection, driven synchronizing wheel (926) rear end is connected with cutting mechanism (94) through the axis of rotation.
3. The lithium ion battery synchronous laminating separator cutting device of claim 1, characterized in that: the cutting mechanism (94) comprises a shell (941), a turntable (942), a connecting rod (943), a straight rod (944), a limiting pipe (945), a blade fixing piece (946) and a cutter (947), a rotary disc (942) is arranged in the outer shell (941), the edge of the rear end of the rotary disc (942) is rotatably connected with a connecting rod (943) through a rotating shaft, the bottom end of the connecting rod (943) is rotatably connected with the limit pipe (945) through a rotating shaft, the middle part of the outer side of the limiting pipe (945) is sleeved with the limiting pipe (945), the limiting pipe (945) is fixed in the end wall of the bottom of the shell (941), the bottom end of the connecting rod (943) is fixedly connected with a blade fixing piece (946), the bottom end of the blade fixing piece (946) is fixed with a cut-off knife (947), the outer side of the outer shell (941) is fixedly connected with the supporting frame (91), and the center of the front end of the rotary disc (942) concentrically rotates with the driven synchronizing wheel (926) through a rotating shaft.
4. The lithium ion battery synchronous laminating separator cutting device of claim 1, characterized in that: compression roller (8) are provided with two, and pile up the setting from top to bottom in two compression rollers (8), and two compression roller (8) front ends rotate with one heart through connecting axle and driving gear (923) and driven gear (924) respectively.
5. The lithium ion battery synchronous laminating separator cutting device of claim 2, characterized in that: the driving gear (923) and the driven gear (924) are meshed at the upper and lower positions, and the outer diameters of the driving gear (923) and the driven gear (924) are the same.
6. The lithium ion battery synchronous laminating separator cutting device of claim 2, characterized in that: the outside of the driving synchronizing wheel (922) and the driven synchronizing wheel (926) is provided with a latch, and the inner wall of the synchronous belt (925) is meshed with the driving synchronizing wheel (922) and the driven synchronizing wheel (926).
7. The lithium ion battery synchronous laminating separator cutting device of claim 2, characterized in that: both sides all are provided with the spacing ring around initiative synchronizing wheel (922) and driven synchronizing wheel (926), and initiative synchronizing wheel (922) external diameter is less than driven synchronizing wheel (926).
8. The lithium ion battery synchronous laminating and membrane cutting device according to claim 3, characterized in that: the surface of the straight rod (944) is smooth, and the inner wall of the limiting pipe (945) is attached to the straight rod (944).
9. The method for manufacturing the lithium ion battery by adopting the lithium ion battery synchronous laminating and diaphragm cutting device of any one of claims 1 to 8 is characterized by comprising the following steps of:
s1, preparing the positive plate: taking a strip-shaped positive electrode raw roll and a first isolating film, adopting the synchronous laminating diaphragm cutting device for the lithium ion battery, laminating the first isolating film on the positive electrode raw roll, and cutting according to a preset length to obtain a positive electrode sheet in a first shape;
s2, preparation of the negative plate: taking a coiled strip-shaped negative electrode raw roll and a second isolating film, adopting the lithium ion battery synchronous laminating diaphragm cutting device, laminating the second isolating film on the negative electrode raw roll, and cutting according to a preset length to obtain a negative electrode piece in a second shape;
s3, winding and forming: and (4) winding the positive plate obtained in the step and the negative plate obtained in the step (S2) by using a winding needle according to a mode that the negative electrode wraps the positive electrode to obtain a winding core.
10. The method for manufacturing a lithium ion battery according to claim 9, wherein: the size of the first diaphragm is larger than that of the positive plate, the size of the second diaphragm is larger than that of the negative plate, and the size of the negative plate is larger than that of the positive plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110645217.8A CN113300003B (en) | 2021-06-10 | 2021-06-10 | Synchronous lamination diaphragm cutting device for lithium ion battery and lithium ion battery manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110645217.8A CN113300003B (en) | 2021-06-10 | 2021-06-10 | Synchronous lamination diaphragm cutting device for lithium ion battery and lithium ion battery manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113300003A true CN113300003A (en) | 2021-08-24 |
| CN113300003B CN113300003B (en) | 2024-10-01 |
Family
ID=77327761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110645217.8A Active CN113300003B (en) | 2021-06-10 | 2021-06-10 | Synchronous lamination diaphragm cutting device for lithium ion battery and lithium ion battery manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113300003B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771103A (en) * | 2021-09-15 | 2021-12-10 | 山东佳润新材料有限公司 | Cutting equipment is used in polymer film production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202038759U (en) * | 2011-03-11 | 2011-11-16 | 江苏赛尔电池有限公司 | Automatic cutting device of cell diaphragm |
| CN110247124A (en) * | 2019-06-24 | 2019-09-17 | 惠州亿纬锂能股份有限公司 | A kind of lithium ion battery high speed laminating method, lamination device and lithium ion battery |
| CN215119000U (en) * | 2021-06-10 | 2021-12-10 | 深圳赛骄阳能源科技股份有限公司 | Lithium ion battery synchronous laminating diaphragm cutting device |
-
2021
- 2021-06-10 CN CN202110645217.8A patent/CN113300003B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202038759U (en) * | 2011-03-11 | 2011-11-16 | 江苏赛尔电池有限公司 | Automatic cutting device of cell diaphragm |
| CN110247124A (en) * | 2019-06-24 | 2019-09-17 | 惠州亿纬锂能股份有限公司 | A kind of lithium ion battery high speed laminating method, lamination device and lithium ion battery |
| CN215119000U (en) * | 2021-06-10 | 2021-12-10 | 深圳赛骄阳能源科技股份有限公司 | Lithium ion battery synchronous laminating diaphragm cutting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771103A (en) * | 2021-09-15 | 2021-12-10 | 山东佳润新材料有限公司 | Cutting equipment is used in polymer film production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113300003B (en) | 2024-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111564654B (en) | Die-cutting folding all-in-one machine | |
| CN215119000U (en) | Lithium ion battery synchronous laminating diaphragm cutting device | |
| CN104701024A (en) | Hybrid type super capacitor | |
| CN105742688B (en) | Device for automatically winding type laminated battery | |
| CN113300003A (en) | Lithium ion battery synchronous laminating diaphragm cutting device and lithium ion battery manufacturing method | |
| CN107053320A (en) | A kind of three axle extra thin copper foil cutting machines and its cutting method | |
| CN109888407B (en) | Method and structure for winding short pole piece by three needles | |
| CN110235297A (en) | Manufacturing method, battery and the winding device of battery | |
| CN215438883U (en) | Lithium battery protection film coiling mechanism | |
| CN212597924U (en) | Battery pole piece rolling equipment | |
| CN116853866A (en) | Coiling mechanism is used in production of coating diaphragm | |
| CN100530770C (en) | Electrode group structure of winding type accumulator | |
| CN213770676U (en) | Coiling mechanism is used in insulating sticky tape production | |
| CN212342674U (en) | Cross cutting folding all-in-one | |
| CN202019025U (en) | Pole group winding device for wound battery | |
| CN216025947U (en) | Rolling device for lithium battery production | |
| CN112173805B (en) | Winding device for manufacturing building waterproof coiled material and using method thereof | |
| CN106898822B (en) | Lithium battery production process and lithium battery | |
| CN207868315U (en) | Laminated batteries manufacturing device | |
| CN220963446U (en) | Winding device capable of rapidly winding up | |
| CN220895588U (en) | Lithium battery winding device | |
| CN212725376U (en) | Rolling device for lithium battery production | |
| CN218827345U (en) | Lithium cell production is with rolling up machine | |
| CN221335992U (en) | Pole piece rolling device | |
| CN206748585U (en) | A kind of three axle extra thin copper foil cutting machines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |