CN112687844A - Battery production process - Google Patents
Battery production process Download PDFInfo
- Publication number
- CN112687844A CN112687844A CN202011547948.0A CN202011547948A CN112687844A CN 112687844 A CN112687844 A CN 112687844A CN 202011547948 A CN202011547948 A CN 202011547948A CN 112687844 A CN112687844 A CN 112687844A
- Authority
- CN
- China
- Prior art keywords
- battery
- electrolyte
- winding
- solid
- positive plate
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000004804 winding Methods 0.000 claims abstract description 47
- 239000003792 electrolyte Substances 0.000 claims abstract description 42
- 238000005520 cutting process Methods 0.000 claims abstract description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 25
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000011888 foil Substances 0.000 claims abstract description 6
- 238000007581 slurry coating method Methods 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims description 52
- 239000011248 coating agent Substances 0.000 claims description 38
- 238000000576 coating method Methods 0.000 claims description 38
- 238000005507 spraying Methods 0.000 claims description 27
- 239000011267 electrode slurry Substances 0.000 claims description 16
- 239000008151 electrolyte solution Substances 0.000 claims description 16
- 238000007731 hot pressing Methods 0.000 claims description 14
- 239000007784 solid electrolyte Substances 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 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 claims description 8
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000002985 plastic film Substances 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 5
- 239000007774 positive electrode material Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims 2
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 238000005538 encapsulation Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 12
- 238000002955 isolation Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 9
- 239000006256 anode slurry Substances 0.000 description 8
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 description 6
- 229910003002 lithium salt Inorganic materials 0.000 description 6
- 159000000002 lithium salts Chemical class 0.000 description 6
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical group [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 229920000620 organic polymer Polymers 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- LTPSRQRIPCVMKQ-UHFFFAOYSA-N 2-amino-5-methylbenzenesulfonic acid Chemical compound CC1=CC=C(N)C(S(O)(=O)=O)=C1 LTPSRQRIPCVMKQ-UHFFFAOYSA-N 0.000 description 2
- 229910032387 LiCoO2 Inorganic materials 0.000 description 2
- 229910010941 LiFSI Inorganic materials 0.000 description 2
- 229910001290 LiPF6 Inorganic materials 0.000 description 2
- 239000012448 Lithium borohydride Substances 0.000 description 2
- 102100027370 Parathymosin Human genes 0.000 description 2
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 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
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
Images
Classifications
-
- 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
- Secondary Cells (AREA)
Abstract
The invention has proposed a battery production technology, the said process includes, coat the positive pole slurry on the membrane material of the current collector, then dry and roll up, then spray the electrolyte layer on the positive pole slurry coating, form the lug that certain interval requires through the die cutting after drying, thus get the compound positive plate of electrolyte, compound positive plate of electrolyte and negative pole lithium foil or lithium tape to carry on the dislocation and wind, and weld the multiple lugs of the corresponding pole piece, get the all solid-state lithium ion battery of winding type of multiple lugs through the encapsulation, compared with traditional liquid battery, the production technology is simple, has saved the step of the liquid injection; compared with the current solid-state battery preparation process, the process has the advantages of high production efficiency, high yield, good internal interface contact of the obtained battery and smaller risk of short circuit between the anode and the cathode.
Description
Technical Field
The invention relates to the technical field of solid-state batteries, in particular to a battery production process.
Background
Lithium batteries have been applied to various fields of daily life, such as consumer electronics, smart wearing, electric vehicles, etc., and as the functions of these electronic devices are improved, the requirements for the performance of the batteries are becoming higher and higher, and higher energy density, higher safety performance, longer cycle life, etc. become new requirements for the batteries in the market.
The current commercialized lithium ion battery mainly contains liquid organic electrolyte, and the volatility and flammability of organic solvent cause the liquid lithium battery to have serious potential safety hazard. In comparison, the solid-state lithium ion battery has great potential in improving the energy density and the safety performance of the battery due to the adoption of the solid electrolyte, and therefore, the solid-state lithium ion battery also becomes a hot spot direction for research and development of enterprises.
At present, the solid-state lithium battery technology is still in the research and development stage. Inorganic solid electrolytes such as sulfide and oxide, and PPC and PEO-based polymer electrolytes, and composites of both, by their respective characteristics and advantages, are regarded as the most potential solid electrolyte materials by various large battery faucet enterprises, and are gradually developed to realize mass production thereof. Two main factors are considered for the current block of solid-state battery industrialization: firstly, the solid electrolyte material has poor processing performance, and the process of mass production is complex; and secondly, the interface contact between the anode and the cathode and the solid electrolyte is poor, so that the molecular-level contact effect between the solid and the solid is difficult to realize in the process of assembling the battery.
Based on the technical scheme, the invention provides a systematized process scheme for solving the technical problems in large-scale production of the existing solid-state batteries, and develops a mature solid-state battery preparation process capable of realizing large-scale mass production, so that the contact effect between a positive electrode and a negative electrode and an electrolyte can be ensured, and the short circuit problem caused by the contact of the positive electrode and the negative electrode in the battery assembly process can be effectively avoided. In addition, the process flow is simple, the automation degree is high, and the yield of finished product battery cores can be effectively improved.
Disclosure of Invention
In view of the above, the invention provides a battery production process which is simpler in process and can effectively avoid the short circuit condition of the positive and negative pole pieces.
The technical scheme of the invention is realized in such a way, and the invention provides a battery production process, which comprises the following steps:
uniformly coating the positive electrode slurry on the surfaces of two sides of an unreeled current collector membrane material by using a coating machine, wherein the width of the current collector membrane material is L1, the coating width of the positive electrode slurry is L2, and L2 is less than L1;
unreeling the first-time coating positive plate, spraying an electrolyte solution to cover the area coated with the positive slurry on the two sides of the first-time coating positive plate by using a coating machine, wherein the spraying width of the electrolyte solution is L3, L2 is more than L3 and less than L1, drying to remove a solvent after spraying is finished, obtaining an electrolyte composite positive plate, and reeling the electrolyte composite positive plate;
unreeling the electrolyte composite positive plate, and carrying out die cutting treatment on two side edges of the electrolyte composite positive plate along the length direction of the electrolyte composite positive plate, wherein the die cutting positions of the two side edges are both positioned between the edge of the positive slurry and the edge of the electrolyte solution spraying area, one side edge is subjected to continuous die cutting, the other side edge is subjected to interval die cutting according to a certain interval, and the uncut part is used as a tab, so that the multi-electrode lug type electrolyte composite positive plate is obtained;
step four, die-cutting the edge of one side of the lithium belt along the length direction according to a certain interval in the step three to obtain the multi-polar ear type negative plate;
step five, carrying out composite winding on the multi-electrode lug type electrolyte composite positive plate obtained in the step three and the multi-electrode lug type negative plate according to a battery winding principle, completely wrapping a positive electrode slurry coating layer by a negative electrode lithium belt in the winding process, enabling the positive electrode lug and the negative electrode lug to be free of contact and overlap, enabling a plurality of electrode lugs on the same electrode plate to be overlapped, and obtaining a winding core of the all-solid-state battery after winding is finished
And step six, respectively welding the positive electrode lug and the negative electrode lug overlapped in the winding core of the all-solid-state battery, and packaging the winding core of the all-solid-state battery by using an aluminum plastic film to obtain the multi-lug winding type all-solid-state lithium ion battery.
In the technical scheme, in the third step, the plurality of tabs obtained by die cutting at a certain interval are overlapped with each other in the winding process, so that the distance between two adjacent tabs is gradually increased by calculating from the winding shaft center to the outer ring. The distance between the lugs needs to be calculated according to the corresponding thickness and the number of turns of the battery, the die cutting position is located between the edge of the anode slurry and the edge of the electrolyte solution spraying area, the electrolyte solution spraying area can cover the coating area of the anode slurry, the insulating and coating effects are achieved, and therefore short circuit is effectively avoided in the winding process.
On the basis of the technical scheme, preferably, the positive electrode slurry is positioned in the middle of the current collector membrane material, and the coating of the positive electrode slurry is superposed with the axis of the current collector membrane material; the sprayed layer of the electrolyte solution is positioned in the middle of the coating of the anode slurry, and the axis of the sprayed layer of the electrolyte solution is coincident with the axis of the coating of the anode slurry.
On the basis of the above technical solution, preferably, the positive electrode slurry includes a positive electrode active material, a binder, a solid electrolyte material, and a solvent.
On the basis of the above technical solution, preferably, the second step further includes covering isolation films on two sides of the secondary coating positive electrode sheet when the secondary coating positive electrode sheet is wound, wherein the width of the isolation films is L4, and L3 is less than L4; and step five, peeling off the isolating membrane before winding the multi-polar lug type electrolyte composite positive plate and the multi-polar lug type negative plate obtained in the step three.
On the basis of the technical scheme, preferably, the method further comprises a seventh step of carrying out hot pressing treatment on the packaged multi-tab winding type all-solid-state lithium ion battery for 3-5min at the temperature of 60-100 ℃ and under the pressure of 8-12MPa by using a hot press.
Among the above technical scheme, the mode that adopts the hot pressing can improve the effect of borrowing away of interface, reduces the problem of contact failure.
Preferably, the seventh step further comprises the step of cold pressing the multi-tab winding type all-solid-state lithium ion battery subjected to hot pressing for 3-5min at normal temperature under the pressure of 8-12MPa by using a hot press.
Among the above technical scheme, the cold pressing treatment can play the effect of stereotyping and stable electric core structure.
On the basis of the above technical solution, preferably, the positive active material is one or a mixture of several of lithium iron phosphate, lithium cobaltate, and nickel cobalt manganese ternary material, the binder is PVDF, the solid electrolyte includes an organic polymer, an inorganic ceramic, and a lithium salt, wherein the organic polymer is one or a mixture of several of PEO, PPC, and PTMS-based organic polymers, the inorganic ceramic is a sulfide inorganic ceramic and/or an oxide inorganic ceramic, and the lithium salt is LiTFSI, LiFSI, LiPF6And LiBH4And one or a mixture of more of lithium salts, wherein the solvent is one or a mixture of more of NMP, DMF and THF.
On the basis of the above technical solution, preferably, the current collector membrane material is an aluminum foil.
In addition to the above technical means, preferably, the width of the lithium ribbon is greater than L2 and less than L3, and in the fifth step, the lithium ribbon protrudes from the end of the positive electrode sheet in the longitudinal direction and covers the surface of the positive electrode slurry coating layer in the width direction during the composite winding.
Compared with the prior art, the battery production process has the following beneficial effects:
(1) the solid-state lithium ion battery is produced in a winding mode, and the electrolyte solution is sprayed on the surface of the coating layer of the anode material as a structural layer, so that the solid-state lithium ion battery can serve as a diaphragm to isolate direct contact of the anode material and the cathode material, and avoid short circuit of the anode and the cathode; but also can be used as electrolyte to conduct lithium ions, thereby saving the production process of injecting electrolyte;
(2) in the production process, the secondary coating positive plate is isolated and coated by the isolating film, so that the electrolyte spraying layer can be effectively prevented from being bonded with each other or the other surface of the current collector film material in the winding process, and the later unwinding is facilitated;
(3) in the prior art, the solid electrolyte membrane is prepared by compounding the polymer and the inorganic ceramic, so that high ionic conductivity and good mechanical property can be both considered, and large-scale production can be realized. Compared with the prior art, the production method and the production process are simpler, the electrode plates and the electrolyte material can be more attached, and the yield is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a process apparatus of step one of the present invention for producing a battery;
FIG. 2 is a top view of the processing equipment of step one of the battery production process of the present invention;
FIG. 3 is a front view of the processing equipment of step two of the battery production process of the present invention;
FIG. 4 is a top view of the processing equipment of step two of the battery production process of the present invention;
FIG. 5 is a schematic diagram of a third step of the present invention;
fig. 6 is a superimposed view of the positive plate and the negative plate in the fifth step of the battery production process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, in conjunction with fig. 2-6, the battery production process of the present invention comprises:
uniformly coating the positive electrode slurry on the surfaces of two sides of an unreeled current collector membrane material by using a coating machine, wherein the width of the current collector membrane material is L1, the coating width of the positive electrode slurry is L2, and L2 is less than L1;
unreeling the first-time coating positive plate, spraying an electrolyte solution to cover the area coated with the positive slurry on the two sides of the first-time coating positive plate by using a coating machine, wherein the spraying width of the electrolyte solution is L3, L2 is more than L3 and less than L1, drying to remove a solvent after spraying is finished, obtaining an electrolyte composite positive plate, and reeling the electrolyte composite positive plate;
unreeling the electrolyte composite positive plate, and carrying out die cutting treatment on two side edges of the electrolyte composite positive plate along the length direction of the electrolyte composite positive plate, wherein the die cutting positions of the two side edges are both positioned between the edge of the positive base slurry and the edge of the electrolyte solution spraying area, one side edge is subjected to continuous die cutting, the other side edge is subjected to interval die cutting according to a certain interval, and the uncut part is used as a tab, so that the multi-polar lug type positive plate is obtained;
step four, die-cutting the edge of one side of the lithium belt along the length direction according to a certain interval in the step three to obtain the multi-polar ear type negative plate;
step five, performing composite winding on the multi-electrode lug type positive plate obtained in the step three and the multi-electrode lug type negative plate according to a battery winding principle, wherein a positive slurry coating layer is completely wrapped by a negative lithium belt in the winding process, the tabs of the two electrode plates are not overlapped with each other, the stacked composite electrode plates are subjected to winding treatment, and a winding core of the all-solid-state battery is obtained after winding is completed, wherein the tabs on the same electrode plate are overlapped with each other and are not in contact with the tab on the other electrode plate;
and step six, welding the overlapped lugs in the winding core of the all-solid-state battery, and packaging the winding core of the all-solid-state battery by using an aluminum plastic film to obtain the multi-lug winding type all-solid-state lithium ion battery.
In a specific embodiment, the positive electrode slurry includes a positive electrode active material, a binder, a solid electrolyte material, and a solvent.
In a specific embodiment, the positive active material is one or a mixture of three materials of lithium iron phosphate, lithium cobaltate and nickel cobalt manganese, the binder is PVDF, the solid electrolyte comprises an organic polymer, an inorganic ceramic and a lithium salt, wherein the organic polymer is one or a mixture of several organic polymers of PEO, PPC and PTMS, the inorganic ceramic is a sulfide inorganic ceramic and/or an oxide inorganic ceramic, and the lithium salt is LiTFSI, LiFSI, LiPF6And LiBH4And one or a mixture of more of lithium salts, wherein the solvent is one or a mixture of more of NMP, DMF and THF.
In a specific embodiment, the second step further includes covering isolation films on two sides of the electrolyte composite positive plate when the electrolyte composite positive plate is rolled, wherein the width of the isolation films is L4, and L3 is less than L4; and step five, before the multi-polar lug type positive plate and the multi-polar lug type negative plate obtained in the step three are stacked, stripping the isolating membrane.
In the specific implementation mode, the method further comprises a seventh step of carrying out hot pressing treatment on the packaged multi-tab winding type all-solid-state lithium ion battery for 3-5min at the temperature of 60-100 ℃ and under the pressure of 8-12MPa by using a hot press.
In a specific implementation mode, the seventh step further comprises the step of carrying out cold pressing treatment on the multi-tab winding type all-solid-state lithium ion battery for 3-5min at normal temperature under the pressure of 8-12MPa after hot pressing by using a hot press.
In a specific embodiment, the current collector membrane is an aluminum foil.
Example 1
Separately mixing LiCoO2PVDF, PEO, LiTFSI and LLZTO are mixed according to the mass ratio of 95: 1.5: 1: 0.25: after 0.25 weight percent, the mixture was poured into NMP so that the solid content of the solution became 70%. Uniformly mixing and stirring to obtain composite anode slurry, coating the composite anode slurry in the center of two surfaces of an aluminum foil with the width of 280mm, wherein the coating width of the composite anode is 200mm, and drying to obtain a first coating anode plate after coating;
PEO, LiTFSI and LLZTO are mixed according to the mass ratio of 1: 0.25: mixing according to the mass ratio of 0.25, putting into THF (tetrahydrofuran) to enable the solid content of the solution to be 80%, spraying the solution on two sides of a first coating positive plate, wherein the spraying width is 220mm, the spraying covers the coating range of the composite positive plate, drying the solvent after the spraying is finished, covering isolation films on the two sides of the plate, and then rolling to obtain an electrolyte composite positive plate, wherein the width of the isolation films is 240mm, and the isolation films cover the spraying covered area;
unreeling the electrolyte composite positive plate, then carrying out die cutting treatment, carrying out die cutting treatment on two side edges of the electrolyte composite positive plate along the length direction of the electrolyte composite positive plate, wherein the die cutting positions of the two side edges are both positioned between the edge of the positive base slurry and the edge of an electrolyte solution spraying area, one side edge is continuously die-cut, the other side edge is subjected to interval die-cut according to a certain interval, and the uncut part is taken as a tab to obtain a multi-electrode tab type electrolyte composite positive plate with the width of 210mm, wherein the part of the tab close to the positive plate is provided with a solid electrolyte with the thickness of 10 mm;
one side edge of the lithium strip along the length direction is subjected to die cutting in advance to obtain the lithium strip with the width of 205mm, and a tab with the same distance with the positive plate is formed. Winding the composite positive plate and the negative plate according to the winding principle of the battery cell, enabling the tabs of the lithium belt and the tabs of the positive plate not to be overlapped with each other, enabling the tabs of the positive plate to be overlapped with each other, enabling the tabs of the lithium belt to be overlapped with each other, respectively welding the two overlapped tabs, and then packaging by using an aluminum-plastic film;
and after packaging, carrying out hot-pressing treatment on the packaged lithium ion battery by using a hot press, wherein the hot-pressing temperature is 100 ℃, the hot-pressing pressure is 12MPa, the hot-pressing treatment is carried out for 5min, and then, carrying out cold-pressing treatment on the lithium ion battery for 5min by using the hot press at normal temperature and the pressure of 12 MPa. And obtaining the multi-tab winding type all-solid-state lithium ion battery.
Example 2
Separately mixing LiCoO2PVDF, PEO, LiTFSI and LLZTO are mixed according to the mass ratio of 95: 1.5: 1: 0.25: after 0.25 weight percent, the mixture was poured into NMP so that the solid content of the solution became 70%. Uniformly mixing and stirring to obtain composite anode slurry, coating the composite anode slurry on two sides of an aluminum foil with the width of 200mm, wherein the coating width of the composite anode is 150mm, and drying to obtain a first coating anode plate after coating;
PEO, LiTFSI and LLZTO are mixed according to the mass ratio of 1: 0.25: mixing according to the mass ratio of 0.25, putting into THF (tetrahydrofuran) to enable the solid content of the solution to be 80%, spraying the solution on a first coating positive plate, wherein the spraying width is 166mm, the spraying covers the coating range of the composite positive plate, drying the solvent after the spraying is finished, covering an isolation film on two sides of the plate, and then rolling to obtain an electrolyte composite positive plate, wherein the width of the isolation film is 200mm, and the isolation film covers the area covered by the spraying;
unreeling the electrolyte composite positive plate, then carrying out die cutting treatment, carrying out die cutting treatment on two side edges of the electrolyte composite positive plate along the length direction of the electrolyte composite positive plate, wherein the die cutting positions of the two side edges are both positioned between the edge of the positive electrode slurry and the edge of an electrolyte solution spraying area, one side edge is continuously die-cut, the other side edge is subjected to interval die-cut according to a certain interval, and the uncut part is taken as a tab to obtain a multipolar ear type electrolyte composite positive plate with the width of 166mm, wherein the part of the tab close to the positive plate is provided with 8mm of solid electrolyte;
one side edge of the lithium strip along the length direction is subjected to die cutting in advance to obtain the lithium strip with the width of 160mm, and a tab with the same distance with the positive plate is formed. Winding the composite positive plate and the negative plate according to the winding principle of the battery cell, enabling the tabs of the lithium belt and the tabs of the positive plate not to be overlapped with each other, enabling the tabs of the positive plate to be overlapped with each other, enabling the tabs of the lithium belt to be overlapped with each other, respectively welding the two overlapped tabs, and then packaging by using an aluminum-plastic film;
and after packaging, carrying out hot-pressing treatment on the packaged lithium ion battery by using a hot press, wherein the hot-pressing temperature is 60 ℃, the hot-pressing pressure is 8MPa, the hot-pressing treatment is carried out for 3min, and then carrying out cold-pressing treatment on the lithium ion battery for 3min by using the hot press at normal temperature and under the pressure of 8 MPa. And obtaining the multi-tab winding type all-solid-state lithium ion battery.
The all-solid-state lithium ion batteries prepared in the embodiments 1 and 2 have good tab contact and no short circuit, the production process can be directly carried out in a winding mode, the efficiency is high, and the error is small.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A battery production process is characterized by comprising the following steps:
uniformly coating the positive electrode slurry on the surfaces of two sides of an unreeled current collector membrane material by using a coating machine, wherein the width of the current collector membrane material is L1, the coating width of the positive electrode slurry is L2, and L2 is less than L1;
unreeling the first-time coating positive plate, spraying an electrolyte solution to cover the area coated with the positive slurry on the two sides of the first-time coating positive plate by using a coating machine, wherein the spraying width of the electrolyte solution is L3, L2 is more than L3 and less than L1, drying to remove a solvent after spraying is finished, obtaining an electrolyte composite positive plate, and reeling the electrolyte composite positive plate;
unreeling the electrolyte composite positive plate, and carrying out die cutting treatment on two side edges of the electrolyte composite positive plate along the length direction of the electrolyte composite positive plate, wherein the die cutting positions of the two side edges are both positioned between the edge of the positive slurry and the edge of the electrolyte solution spraying area, one side edge is subjected to continuous die cutting, the other side edge is subjected to interval die cutting according to a certain interval, and the uncut part is used as a tab, so that the multi-electrode lug type electrolyte composite positive plate is obtained;
step four, die-cutting the edge of one side of the lithium belt along the length direction according to a certain interval in the step three to obtain the multi-polar ear type negative plate;
step five, carrying out composite winding on the multi-electrode lug type electrolyte composite positive plate obtained in the step three and the multi-electrode lug type negative plate according to a battery winding principle, wherein a positive electrode slurry coating layer is completely wrapped by a negative electrode lithium belt in the winding process, the positive electrode lug and the negative electrode lug are not in contact and overlapping, a plurality of electrode lugs on the same electrode plate are overlapped with each other, and after the winding is finished, a winding core of the all-solid-state battery is obtained;
and step six, respectively welding the positive electrode lug and the negative electrode lug overlapped in the winding core of the all-solid-state battery, and packaging the winding core of the all-solid-state battery by using an aluminum plastic film to obtain the multi-lug winding type all-solid-state lithium ion battery.
2. The battery production process of claim 1, wherein the positive electrode slurry comprises a positive electrode active material, a binder, a solid electrolyte material, and a solvent.
3. The battery production process according to claim 1, wherein the second step further comprises, when the electrolyte composite positive electrode sheet is rolled, covering the two sides of the electrolyte composite positive electrode sheet with separation films, wherein the width of the separation films is L4, and L3 < L4; and step five, peeling off the isolating membrane before winding the multi-polar lug type electrolyte composite positive plate and the multi-polar lug type negative plate obtained in the step three.
4. The battery production process of claim 1, further comprising a seventh step of performing hot pressing treatment on the packaged multi-tab winding type all-solid-state lithium ion battery at 60-100 ℃ under 8-12MPa for 3-5min by using a hot press.
5. The battery production process of claim 4, wherein the seventh step comprises cold pressing the multi-tab wound all-solid-state lithium ion battery at room temperature under 8-12MPa for 3-5min by using a hot press.
6. The process for producing a battery according to claim 1, wherein the current collector film is an aluminum foil.
7. The battery production process of claim 1, wherein the width of the lithium tape is greater than L2 and less than L3, and in step five, the lithium tape protrudes from the end of the positive electrode sheet in the length direction and covers the surface of the positive electrode slurry coating layer in the width direction during the composite winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547948.0A CN112687844A (en) | 2020-12-24 | 2020-12-24 | Battery production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547948.0A CN112687844A (en) | 2020-12-24 | 2020-12-24 | Battery production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112687844A true CN112687844A (en) | 2021-04-20 |
Family
ID=75451947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011547948.0A Pending CN112687844A (en) | 2020-12-24 | 2020-12-24 | Battery production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112687844A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114203948A (en) * | 2021-11-23 | 2022-03-18 | 南昌大学 | Lithium ion battery electrode plate/solid electrolyte composite membrane, preparation method and application thereof in lithium ion battery |
| CN115000494A (en) * | 2022-06-16 | 2022-09-02 | 杨维年 | Low-energy-consumption production process for sodium ion battery |
| CN115863534A (en) * | 2022-12-29 | 2023-03-28 | 武汉昊诚锂电科技股份有限公司 | Lithium-ion battery positive plate and preparation device and preparation process thereof |
| WO2024164798A1 (en) * | 2023-02-06 | 2024-08-15 | 江苏新宜中澳环境技术有限公司 | Capacitive deionization electrode production system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034742A (en) * | 2006-03-11 | 2007-09-12 | 深圳市比克电池有限公司 | Making method for multi-pole ear-lithium ion battery pole slice and making method and battery of the electrical core coiling body |
| CN107394098A (en) * | 2017-07-14 | 2017-11-24 | 江苏春兰清洁能源研究院有限公司 | A kind of method that lithium ion battery is prepared using coiling body battery core |
| CN108232318A (en) * | 2018-01-30 | 2018-06-29 | 陕西煤业化工技术研究院有限责任公司 | A kind of production method of all solid state power lithium-ion battery |
| CN109301161A (en) * | 2018-11-02 | 2019-02-01 | 山东玉皇新能源科技有限公司 | Electrodes of lithium-ion batteries and its winding method coated with dielectric film |
| CN211088393U (en) * | 2020-01-13 | 2020-07-24 | 恒大新能源技术(深圳)有限公司 | Positive electrode sheet, laminated battery and positive electrode sheet coating device |
-
2020
- 2020-12-24 CN CN202011547948.0A patent/CN112687844A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034742A (en) * | 2006-03-11 | 2007-09-12 | 深圳市比克电池有限公司 | Making method for multi-pole ear-lithium ion battery pole slice and making method and battery of the electrical core coiling body |
| CN107394098A (en) * | 2017-07-14 | 2017-11-24 | 江苏春兰清洁能源研究院有限公司 | A kind of method that lithium ion battery is prepared using coiling body battery core |
| CN108232318A (en) * | 2018-01-30 | 2018-06-29 | 陕西煤业化工技术研究院有限责任公司 | A kind of production method of all solid state power lithium-ion battery |
| CN109301161A (en) * | 2018-11-02 | 2019-02-01 | 山东玉皇新能源科技有限公司 | Electrodes of lithium-ion batteries and its winding method coated with dielectric film |
| CN211088393U (en) * | 2020-01-13 | 2020-07-24 | 恒大新能源技术(深圳)有限公司 | Positive electrode sheet, laminated battery and positive electrode sheet coating device |
Non-Patent Citations (1)
| Title |
|---|
| 徐国荣等 主编: "《电化学设备与工程设计》", 31 March 2018 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114203948A (en) * | 2021-11-23 | 2022-03-18 | 南昌大学 | Lithium ion battery electrode plate/solid electrolyte composite membrane, preparation method and application thereof in lithium ion battery |
| CN115000494A (en) * | 2022-06-16 | 2022-09-02 | 杨维年 | Low-energy-consumption production process for sodium ion battery |
| CN115863534A (en) * | 2022-12-29 | 2023-03-28 | 武汉昊诚锂电科技股份有限公司 | Lithium-ion battery positive plate and preparation device and preparation process thereof |
| WO2024164798A1 (en) * | 2023-02-06 | 2024-08-15 | 江苏新宜中澳环境技术有限公司 | Capacitive deionization electrode production system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112687844A (en) | Battery production process | |
| CN208690415U (en) | A kind of flexible lithium ion battery | |
| CN206727177U (en) | Secondary cell and battery bag | |
| CN109301152A (en) | A kind of lithium ion battery and its manufacturing process | |
| CN110034337B (en) | Method for compounding lithium ion battery pole piece and diaphragm and application of lithium ion battery pole piece and diaphragm in battery preparation | |
| WO2020168879A1 (en) | Pole piece, cell and battery | |
| CN105261781B (en) | Electrochemical cell and preparation method thereof | |
| CN101192683A (en) | Lithium ionic cell and its manufacture method | |
| CN207572477U (en) | Electrode assembly and secondary cell | |
| CN111540880A (en) | Negative plate, preparation method and lithium ion battery comprising negative plate | |
| WO2013098970A1 (en) | Method for producing electrode and method for producing non-aqueous electrolyte battery | |
| CN102299384A (en) | 160AH lithium iron phosphate square battery and production process thereof | |
| CN114788037A (en) | Method for prelithiation of multiple anodes | |
| CN114583288A (en) | Battery cell and battery | |
| CN110429239A (en) | A kind of assemble method and pole piece stepped construction of soft package lithium ion cell polar piece | |
| CN114242941A (en) | A negative electrode sheet and its application | |
| CN109888162A (en) | Have gluing structure battery core of embedded tab and preparation method thereof and lithium battery | |
| CN104037454A (en) | Preparation method of power lithium ion battery | |
| US11223050B2 (en) | Spliced lithium strip, preparation method thereof, and related negative electrode plate, battery core, lithium ion battery, battery module, battery pack and apparatus | |
| CN102024990A (en) | Method for manufacturing cells of power lithium ion batteries | |
| CN101499542B (en) | Method of manufacturing lithium-ion secondary battery, electrolytic solution, and lithium-ion secondary battery | |
| CN119230921A (en) | A fully solid-state battery cell and its preparation method and application | |
| CN111816843A (en) | Solid-state battery and manufacturing method thereof | |
| CN118173904A (en) | Solid lithium ion battery and battery core winding method thereof | |
| CN117747842A (en) | Current collector treatment method, current collector, secondary battery and electrochemical device |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210420 |