CN108682895A - A kind of manufacture craft of lithium-ion electric core - Google Patents
A kind of manufacture craft of lithium-ion electric core Download PDFInfo
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- CN108682895A CN108682895A CN201810317715.8A CN201810317715A CN108682895A CN 108682895 A CN108682895 A CN 108682895A CN 201810317715 A CN201810317715 A CN 201810317715A CN 108682895 A CN108682895 A CN 108682895A
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- battery core
- lithium
- naked battery
- pressure
- manufacture craft
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 32
- 238000002955 isolation Methods 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000007731 hot pressing Methods 0.000 claims abstract description 8
- 238000003475 lamination Methods 0.000 claims abstract description 7
- 239000011267 electrode slurry Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000004513 sizing Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 210000002469 basement membrane Anatomy 0.000 claims description 6
- 239000006257 cathode slurry Substances 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims 1
- 206010027146 Melanoderma Diseases 0.000 abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 230000014759 maintenance of location Effects 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011056 performance test Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 210000001787 dendrite Anatomy 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 210000004379 membrane Anatomy 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a kind of manufacture crafts of lithium-ion electric core, include the following steps：1) battery core is made：Naked battery core is made in positive plate, isolation film and negative plate by way of lamination or winding；2) precompressed：Naked battery core is placed on the lower platen of confined space, driving device driving top board is pushed to be waited pressing naked battery core with fixation；3) it is evacuated：Confined space is evacuated with the negative pressure of≤50kPa；4) hot pressing：Naked battery core temperature is set to maintain 30~200 DEG C by heating, and with the pressure of 0.1~10MPa to 3~300s of naked battery core pressure；5) it is molded：So that top board is increased, takes out hot-forming naked battery core.The present invention increases pumping process step in hot-forming process, pole piece is set to contact more uniformity with isolation film, to avoid charged interface blackspot, it reduces because of security risks such as the internal short-circuits that analysis lithium is brought, and the capacity retention energy in battery charging and discharging cycle is promoted, so that battery cycle life is promoted 20% or more.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of manufacture crafts of lithium-ion electric core.
Background technology
Cycle life and security performance are two important performance indexes of lithium ion battery.Wherein, battery cycle life contracts
A short principal element is battery core deformation, the especially lithium-ion electric core of winding type structure, is filled as battery constantly recycles
Electric discharge, positive/negative plate thickness increase, and core internal stress increases and battery core is caused to deform.Currently, widespread practice in industry
It is to coat sticky feature coating on diaphragm surface layer, and it is good so that diaphragm is played with positive/negative plate by the modes such as heat or pressurize
Adhesive effect, to solve the problem on deformation during circulating battery.
However, the way has the following defects：As shown in Figure 1, the viscous coating 2 of diaphragm 1 is in uneven thickness while positive and negative
There is also thickness fluctuations for pole piece, and the partially thick position of diaphragm Nian Jie with pole piece 3 can form closed area 4 when winding in this way, cause gas
Residual；In this way, anodic interface easily forms blackspot, Li dendrite in gas storage position when charging, consumption electrolyte velocity is accelerated, and electricity is caused
Pond circulation volume rapid decay；In addition, Li dendrite accumulation can puncture diaphragm and cause battery internal short-circuit to a certain extent, battery is influenced
Security performance.
Invention content
It is an object of the invention to：In view of the deficiencies of the prior art, a kind of manufacture craft of lithium-ion electric core is provided, it should
It is uneven can also to reduce the battery core interface caused by diaphragm coating thickness difference in addition to it can prevent battery core cyclic deformation for technique
Property, effectively improve cycle performance of battery and security performance.
To achieve the goals above, the present invention uses following technical scheme：
A kind of manufacture craft of lithium-ion electric core, includes the following steps：
Step 1) makes battery core：Naked electricity is made in positive plate, isolation film and negative plate by way of lamination or winding
Core；
Step 2), precompressed：Naked battery core is placed on the lower platen of confined space, driving device drives top board to push with solid
Surely it waits pressing naked battery core；
Step 3), pumping：Confined space is evacuated with the negative pressure of≤- 50kPa；
Step 4), hot pressing：Naked battery core temperature is set to maintain 30~200 DEG C by heating, and with the pressure of 0.1~10MPa
To 3~300s of naked battery core pressure；
Step 5), molding：So that top board is increased, takes out hot-forming naked battery core.
Compared with the prior art, manufacture craft of the invention is evacuated when carrying out hot-forming to naked battery core by increasing
Processing step makes the residual gas between pole piece and isolation film remove, then carries out hot pressing, pole piece can be made to be contacted with isolation film in this way
More uniformity, to prevent battery core charging occur interface blackspot and analysis lithium problem, effectively promoted battery cycle life and
Security performance.
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 2), the naked battery core is before precompressed
Using 45~100 DEG C of high-temperature baking 5min~for 24 hours, so as to be heated evenly inside naked battery core, while shortening pressing time, is promoted
Production efficiency.
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 2), the driving device be motor,
Pneumatic cylinder or hydraulic cylinder.
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 3), time of the pumping is 2~
20s。
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 4), the pressure size of pressure is 0.5
~10MPa.
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 4), pressure mode includes that constant pressure is applied
Pressure and transformation pressure.Wherein, constant pressure pressure keeps pressurization parameter constant, and transformation pressure, which is course of exerting pressure, makes pressurization Parameter Subsection
Setting or consecutive variations.
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 4), mode of heating includes that resistance adds
Heat, infrared heating and electromagnetic wave heating.
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 1), the making of isolation film：It is being isolated
At least one side of basement membrane coats viscous coating, using obtained isolation film after baking, cutting.Wherein, viscous coating can be viscous
Property the functional coatings such as antioxidant coating, sticky flame retardant coating.
The preferred embodiment of manufacture craft as lithium-ion electric core of the present invention, in step 1), positive plate and negative plate make：
Anode sizing agent and negative electrode slurry are made using conventional cathode slurry and negative electrode slurry production method, and anode sizing agent is coated in aluminium
On foil collector, negative electrode slurry is coated in copper foil current collector, then passes through roll-in, cross cutting, the obtained positive plate of slitting technique
And negative plate.
The beneficial effects of the present invention are：The present invention is uneven for cell interface caused by isolation film coating thickness difference
Property and cause charged interface blackspot and analysis lithium problem, provide a kind of manufacture craft of lithium-ion electric core, which is being hot pressed into
Type process increases to pole piece and isolation film clearance position pumping process step, and positive/negative plate is made to contact more uniform one with isolation film
It causes, to avoid charged interface blackspot, reduces because of security risks such as the internal short-circuits that analysis lithium is brought, and promote battery charging and discharging cycle
In capacity retention energy, make battery cycle life promoted 20% or more.
Description of the drawings
Fig. 1 is pole piece in the prior art and coating membrane contacts schematic cross-section.
Fig. 2 is the structural schematic diagram of the manufacture craft of the present invention.
In figure：1- diaphragms；2- viscous coatings；3- pole pieces；The closed areas 4-；The naked battery cores of 5-；6- seal cases；7- driving dresses
It sets；8- top boards；9- lower platens.
Specific implementation mode
To keep technical scheme of the present invention and advantage clearer, below in conjunction with specific embodiment, to the skill of the present invention
Art scheme is clearly and completely described, it is clear that and described embodiments are some of the embodiments of the present invention, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art institute without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of manufacture craft of lithium-ion electric core, includes the following steps：
Step 1), positive plate and negative plate make：Anode is made using conventional cathode slurry and negative electrode slurry production method
Slurry and negative electrode slurry, and anode sizing agent is coated in aluminum foil current collector, negative electrode slurry is coated in copper foil current collector, so
Positive plate and negative plate is made by roll-in, cross cutting, slitting technique afterwards；The making of isolation film：In at least one side of isolation basement membrane
Viscous coating is coated, using obtained isolation film after baking, cutting；Make battery core：Positive plate, isolation film and negative plate are passed through
Naked battery core 5 is made in the mode of lamination or winding；
Step 2), precompressed：Naked battery core 5 is placed on the lower platen 9 of seal case 6, driving device 7 drives under top board 8
Pressure waits that it is motor, pneumatic cylinder or hydraulic cylinder to press naked battery core 5, driving device 7 with fixed；
Step 3), pumping：Seal case 6 is evacuated with the negative pressure of -50kPa, the time of pumping is 12s；
Step 4), hot pressing：5 temperature of naked battery core is set to maintain 50 DEG C by way of resistance heating, and with the constant pressure of 5MPa
Power is to the pressure of naked battery core 5 10s；
Step 5), molding：So that top board 8 is increased, take out hot-forming naked battery core 5, carries out the place of next naked battery core 5
Reason.
Embodiment 2
A kind of manufacture craft of lithium-ion electric core, includes the following steps：
Step 1), positive plate and negative plate make：Anode is made using conventional cathode slurry and negative electrode slurry production method
Slurry and negative electrode slurry, and anode sizing agent is coated in aluminum foil current collector, negative electrode slurry is coated in copper foil current collector, so
Positive plate and negative plate is made by roll-in, cross cutting, slitting technique afterwards；The making of isolation film：In at least one side of isolation basement membrane
Viscous coating is coated, using obtained isolation film after baking, cutting；Make battery core：Positive plate, isolation film and negative plate are passed through
Naked battery core 5 is made in the mode of lamination or winding；
Step 2), precompressed：Naked battery core 5 is placed on the lower platen 9 of seal case 6, driving device 7 drives under top board 8
Pressure waits that it is motor, pneumatic cylinder or hydraulic cylinder to press naked battery core 5, driving device 7 with fixed；
Step 3), pumping：Seal case 6 is evacuated with the negative pressure of -60kPa, the time of pumping is 20s；
Step 4), hot pressing：5 temperature of naked battery core is set to maintain 200 DEG C by way of electromagnetic wave heating, and with 0.1~10MPa
Transformation pressure mode to naked battery core 5 press 20s；
Step 5), molding：So that top board 8 is increased, take out hot-forming naked battery core 5, carries out the place of next naked battery core 5
Reason.
Embodiment 3
A kind of manufacture craft of lithium-ion electric core, includes the following steps：
Step 1), positive plate and negative plate make：Anode is made using conventional cathode slurry and negative electrode slurry production method
Slurry and negative electrode slurry, and anode sizing agent is coated in aluminum foil current collector, negative electrode slurry is coated in copper foil current collector, so
Positive plate and negative plate is made by roll-in, cross cutting, slitting technique afterwards；The making of isolation film：In at least one side of isolation basement membrane
Viscous coating is coated, using obtained isolation film after baking, cutting；Make battery core：Positive plate, isolation film and negative plate are passed through
Naked battery core 5 is made in the mode of lamination or winding；
Step 2), to naked battery core 5 using 45 DEG C high-temperature baking for 24 hours, so as to be heated evenly inside naked battery core 5；
Step 3), precompressed：Naked battery core 5 is placed on the lower platen 9 of seal case 6, driving device 7 drives under top board 8
Pressure waits that it is motor, pneumatic cylinder or hydraulic cylinder to press naked battery core 5, driving device 7 with fixed；
Step 4), pumping：Seal case 6 is evacuated with the negative pressure of -50kPa, the time of pumping is 2s；
Step 5), hot pressing：5 temperature of naked battery core is set to maintain 35 DEG C by way of resistance heating, and with the constant of 0.5MPa
Pressure is to the pressure of naked battery core 5 20s；
Step 6), molding：So that top board 8 is increased, take out hot-forming naked battery core 5, carries out the place of next naked battery core 5
Reason.
Embodiment 4
A kind of manufacture craft of lithium-ion electric core, includes the following steps：
Step 1), positive plate and negative plate make：Anode is made using conventional cathode slurry and negative electrode slurry production method
Slurry and negative electrode slurry, and anode sizing agent is coated in aluminum foil current collector, negative electrode slurry is coated in copper foil current collector, so
Positive plate and negative plate is made by roll-in, cross cutting, slitting technique afterwards；The making of isolation film：In at least one side of isolation basement membrane
Viscous coating is coated, using obtained isolation film after baking, cutting；Make battery core：Positive plate, isolation film and negative plate are passed through
Naked battery core 5 is made in the mode of lamination or winding；
Step 2), the high-temperature baking 5min that 100 DEG C are used to naked battery core 5, so as to be heated evenly inside naked battery core 5；
Step 3), precompressed：Naked battery core 5 is placed on the lower platen 9 of seal case 6, driving device 7 drives under top board 8
Pressure waits that it is motor, pneumatic cylinder or hydraulic cylinder to press naked battery core 5, driving device 7 with fixed；
Step 4), pumping：Seal case 6 is evacuated with the negative pressure of -60kPa, the time of pumping is 20s；
Step 5), hot pressing：5 temperature of naked battery core is set to maintain 200 DEG C by way of electromagnetic wave heating, and with 0.1~10MPa
Transformation pressure mode to naked battery core 5 press 20s；
Step 6), molding：So that top board 8 is increased, take out hot-forming naked battery core 5, carries out the place of next naked battery core 5
Reason.
Comparative example 1
As different from Example 1, this comparative example saves pump step, remaining is with embodiment 1, and which is not described herein again.
Comparative example 2
As different from Example 3, this comparative example saves pump step, remaining is with embodiment 3, and which is not described herein again.
The naked battery core of Examples 1 to 4 and comparative example 1~2 is packaged respectively, is dried in vacuo, fluid injection, chemical conversion, degasification,
Partial volume process is fabricated to lithium ion battery, and it is S1~S4 and D1~D2 that battery obtained is numbered respectively.
Cycle performance test is carried out to battery S1~S4 and D1~D2 respectively and security performance is tested.
Wherein, security performance, which is tested, is：1C is overcharged 1 hour, external short circuit 10 minutes, 130 DEG C of thermal shocks 30 minutes, 1.5m
High free-electron model；Whether observation battery occurs leakage, on fire, explosive event, if occurring, leakage, on fire, exploding is denoted as "Yes", if
No leakage, without it is on fire, without explosion be denoted as "No".
Test result is shown in Table 1.
Table 1S1~S4 and D1~D2 cycle performance of battery is tested and security performance test result
By the test result of table 1 it is found that first, the circulating battery capacity retention ratio of S1~S4 is 90% or more, and D1
The circulating battery capacity retention ratio of~D2 shows that having for the battery that present invention process makes more preferably recycles 70% or so
Performance；Secondly, not there is a situation where leakage, on fire, explosion, security performance test percent of pass is up to the battery of S1~S4
100%；And the battery of D1~D2 there is a situation where leakage, it is on fire, explosion showed increased, security performance test percent of pass only have
37.5%, show the battery that present invention process makes has higher security performance.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is changed.Therefore, the invention is not limited in above-mentioned specific implementation mode, every those skilled in the art exist
Made any conspicuously improved, replacement or modification all belongs to the scope of protection of the present invention on the basis of the present invention.This
Outside, although having used some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (9)
1. a kind of manufacture craft of lithium-ion electric core, which is characterized in that include the following steps：
Step 1) makes battery core：Naked battery core is made in positive plate, isolation film and negative plate by way of lamination or winding；
Step 2), precompressed：Naked battery core is placed on the lower platen of confined space, driving device driving top board is pushed to be waited for fixation
Press naked battery core；
Step 3), pumping：Confined space is evacuated with the negative pressure of≤- 50kPa；
Step 4), hot pressing：Naked battery core temperature is set to maintain 30~200 DEG C by heating, and with the pressure of 0.1~10MPa to naked
3~300s of battery core pressure；
Step 5), molding：So that top board is increased, takes out hot-forming naked battery core.
2. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 2), the naked battery core
Before precompressed using 45~100 DEG C high-temperature baking 5min~for 24 hours, so as to be heated evenly inside naked battery core.
3. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 2), the driving dress
It is set to motor, pneumatic cylinder or hydraulic cylinder.
4. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 3), the pumping
Time is 2~20s.
5. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 4), the pressure of pressure
Size is 0.5~10MPa.
6. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 4), press mode packet
Include constant pressure pressure and transformation pressure.
7. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 4), mode of heating packet
Include resistance heating, infrared heating and electromagnetic wave heating.
8. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 1), the system of isolation film
Make：Viscous coating is coated in at least one side of isolation basement membrane, using obtained isolation film after baking, cutting.
9. the manufacture craft of lithium-ion electric core according to claim 1, it is characterised in that：In step 1), positive plate and negative
Pole piece makes：Anode sizing agent and negative electrode slurry are made using conventional cathode slurry and negative electrode slurry production method, and anode is starched
Material is coated in aluminum foil current collector, and negative electrode slurry is coated in copper foil current collector, then passes through roll-in, cross cutting, slitting technique
Positive plate and negative plate is made.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317715.8A CN108682895B (en) | 2018-04-10 | 2018-04-10 | Manufacturing process of lithium ion battery cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317715.8A CN108682895B (en) | 2018-04-10 | 2018-04-10 | Manufacturing process of lithium ion battery cell |
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| CN108682895A true CN108682895A (en) | 2018-10-19 |
| CN108682895B CN108682895B (en) | 2020-06-12 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109546231A (en) * | 2018-11-14 | 2019-03-29 | 福建巨电新能源股份有限公司 | A kind of stacked laminated aluminum film lithium ion battery negative pressure transfer method |
| CN111477971A (en) * | 2020-05-26 | 2020-07-31 | 苏州凌威新能源科技有限公司 | Battery cell shaping method |
| CN111786030A (en) * | 2020-07-09 | 2020-10-16 | 上海思客琦自动化工程有限公司 | Steel belt leading-in mechanism for lithium battery and operation method of steel belt leading-in mechanism |
| CN112582751A (en) * | 2020-12-18 | 2021-03-30 | 微宏动力系统（湖州）有限公司 | Diaphragm, lithium battery and preparation method thereof |
| CN112615062A (en) * | 2020-12-19 | 2021-04-06 | 山东聚信新能源科技有限公司 | High-energy-density laminated lithium ion battery pole group, manufacturing method thereof and battery |
| CN114566715A (en) * | 2022-03-21 | 2022-05-31 | 上海兰钧新能源科技有限公司 | Hot pressing apparatus and hot pressing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109546231A (en) * | 2018-11-14 | 2019-03-29 | 福建巨电新能源股份有限公司 | A kind of stacked laminated aluminum film lithium ion battery negative pressure transfer method |
| CN111477971A (en) * | 2020-05-26 | 2020-07-31 | 苏州凌威新能源科技有限公司 | Battery cell shaping method |
| CN111786030A (en) * | 2020-07-09 | 2020-10-16 | 上海思客琦自动化工程有限公司 | Steel belt leading-in mechanism for lithium battery and operation method of steel belt leading-in mechanism |
| CN111786030B (en) * | 2020-07-09 | 2024-04-26 | 上海思客琦自动化工程有限公司 | Steel belt guiding mechanism for lithium battery and operation method of steel belt guiding mechanism |
| CN112582751A (en) * | 2020-12-18 | 2021-03-30 | 微宏动力系统（湖州）有限公司 | Diaphragm, lithium battery and preparation method thereof |
| CN112615062A (en) * | 2020-12-19 | 2021-04-06 | 山东聚信新能源科技有限公司 | High-energy-density laminated lithium ion battery pole group, manufacturing method thereof and battery |
| CN114566715A (en) * | 2022-03-21 | 2022-05-31 | 上海兰钧新能源科技有限公司 | Hot pressing apparatus and hot pressing method |
| CN114566715B (en) * | 2022-03-21 | 2024-02-09 | 上海兰钧新能源科技有限公司 | Hot pressing equipment and hot pressing method |
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Effective date of registration: 20220307 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 523000 Dalang Town, Dongguan, Guangdong province Xiangshan Pine Hill Village Xiangshan Industrial Park Jiayuan Road No. 9 Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |