CN107293809A - A kind of soft bag lithium ionic cell and its manufacture method - Google Patents
A kind of soft bag lithium ionic cell and its manufacture method Download PDFInfo
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- CN107293809A CN107293809A CN201710647960.0A CN201710647960A CN107293809A CN 107293809 A CN107293809 A CN 107293809A CN 201710647960 A CN201710647960 A CN 201710647960A CN 107293809 A CN107293809 A CN 107293809A
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- battery core
- core monomer
- monomer
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- ionic cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- 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
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- 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
Abstract
The present invention relates to a kind of soft bag lithium ionic cell, including battery core assembly and Soft Roll shell, the battery core assembly includes multiple battery core monomers parallel with one another, and the battery core monomer is takeup type battery core monomer, and the thickness of the battery core assembly is more than 1cm.Coiled its production efficiency of battery core monomer is higher, production cost is also lower, multiple battery core monomer parallel ways structure stacked together can avoid the problem of takeup type structure battery core internal resistance is higher, can also solve thick core structure the problem of the planarization that later stage charge and discharge process always occurs is poor；The battery core assembly thickness formed after multiple battery core monomers are in parallel is more than 1cm, this causes battery core assembly to have bigger capacity, therefore not only production efficiency is high, production cost is low for the soft bag lithium ionic cell, but also there is the characteristics of energy density is high, battery capacity is big, and battery high rate during charging-discharging can also be improved.The invention also discloses a kind of manufacture method of soft bag lithium ionic cell.
Description
Technical field
The present invention relates to lithium ion battery production technical field, more particularly to a kind of soft bag lithium ionic cell and its manufacturer
Method.
Background technology
For cylindrical battery and aluminum hull rectangular cell, using aluminum plastic film soft bag lithium ionic cell due to
Simple in construction, small volume, lightweight, shape can be varied as desired in, energy density is high, it is safe the features such as, therefore its should
More and more extensive with scope, demand is also increased.
Application of the lithium ion battery in energy storage field obtains rapid development, and being mainly used in for energy storage market is renewable
The energy is grid-connected and distributed power generation and microgrid field, and family is also had developed into for popular application abroad with energy storage, in microgrid
Energy storage field is used at field and the family of pursuit volume and weight advantage, and high power capacity battery core has very big advantage, and Large Copacity is soft
Bag battery exactly uses the battery of this battery core.
It is well known that current Large Copacity soft-package battery generally uses the stacked mode of production：The both positive and negative polarity being die cut
Piece and barrier film are stacked together, are characterized in that the internal resistance of cell that makes is small and suitable heavy-current discharge, but it has the disadvantage technique
Complexity, production cost is high, lamination efficiency is low, and consistency of performance is poor, it is more difficult to ensure planarization of the battery core in follow-up discharge and recharge, from
And influence cycle life.
Therefore, the production cost of Large Copacity soft-package battery how is reduced, and causes Large Copacity soft-package battery has excellent
Good planarization and preferable cycle life are the technical problems of current those skilled in the art's urgent need to resolve.
The content of the invention
For above-mentioned technical problem, the present invention provides a kind of soft bag lithium ionic cell, so as to reduce Large Copacity Soft Roll
The production cost of lithium ion battery, while enabling to Large Copacity soft-package battery that there is excellent planarization and preferable circulation
Life-span.
Present invention also offers a kind of manufacture method of soft bag lithium ionic cell.
It is described to reach above-mentioned purpose, the soft bag lithium ionic cell that the present invention is provided, including battery core assembly and Soft Roll shell
Battery core assembly includes multiple battery core monomers parallel with one another, and the battery core monomer is takeup type battery core monomer, and the battery core is total
Into thickness be more than 1cm.
It is preferred that, in above-mentioned soft bag lithium ionic cell, the thickness of any one battery core monomer is no more than 1cm.
It is preferred that, in above-mentioned soft bag lithium ionic cell, the lug of the battery core monomer is full lug, multi pole ears or monopole
Any one in ear.
It is preferred that, in above-mentioned soft bag lithium ionic cell, the battery core monomer is rectangular, the positive pole pole of the battery core monomer
Ear and negative lug are respectively symmetrically distributed in the both sides on the battery core monomer length direction.
It is preferred that, in above-mentioned soft bag lithium ionic cell, the battery core monomer is rectangular, the positive pole pole of the battery core monomer
Ear and negative lug are respectively positioned on a side of the battery core monomer.
It is preferred that, in above-mentioned soft bag lithium ionic cell, the battery core assembly include 2~7 it is parallel with one another described
Battery core monomer.
Disclosed in this invention soft bag lithium ionic cell manufacture method, including step：
1) the battery core monomer is made in winding after stacking anode pole piece, barrier film and cathode pole piece；
2) it is in parallel after battery core monomer described at least two is overlapped to form overall, then in the overall positive pole welding
Area forms the battery core assembly after welding positive pole ear, negative pole weld zone welding negative lug, and the thickness of the battery core assembly is big
In 1cm；
3) soft bag lithium ionic cell is made by subsequent treatment in the battery core assembly.
It is preferred that, in above-mentioned manufacture method, the subsequent treatment includes：Rush shell, top side seal, fluid injection, heat cold pressing, change
Into the baking of, fixture, secondary encapsulation and partial volume.
It is preferred that, in above-mentioned manufacture method, the step 1) in the battery core monomer that is made it is rectangular, the battery core monomer
Thickness be 5mm-10mm, width is 5cm-15cm, and length is 10cm-25cm.
It is preferred that, in above-mentioned manufacture method, in the battery core monomer, positive pole is left white area for positive pole ear weld zone, bears
Pole is left white area for negative lug weld zone, the step 1) in also include, on the width of the battery core monomer, to described
The two ends of positive pole ear weld zone and the negative lug weld zone are cut out, and the amount of cutting out is 0.5cm-1cm.
It is preferred that, in above-mentioned manufacture method, the thickness of the positive pole ear and the negative lug is 0.1mm-
0.5mm, width is 3cm-10cm.
It is preferred that, in above-mentioned manufacture method, the step 1) in made battery core monomer, in the length of battery core monomer
On direction, coating of the coating two ends on the anode pole piece on the cathode pole piece, the two ends of the barrier film surpass
The coating gone out on the cathode pole piece.
It is preferred that, in above-mentioned manufacture method, the step 2) it is middle using positive pole ear described in ultrasonic bonding and described
Negative lug.
It is preferred that, in above-mentioned manufacture method, the positive pole ear is aluminum metal film, and the negative lug is nickel metal
One kind in piece, nickel copper-plated metal piece or corronil sheet metal.
It can be seen from above-mentioned technical proposal disclosed in this invention the battery core assembly of soft bag lithium ionic cell be by many
Individual battery core monomer formation parallel with one another, and each battery core monomer is takeup type battery core monomer, that is to say, that battery core list
Body is core, and the thickness of the battery core assembly formed by these battery core monomers is more than 1cm.
For the stacked mode of production, coiled its production efficiency of battery core monomer is higher, production cost
Lower, on the one hand multiple battery core monomer parallel ways structure stacked together can avoid takeup type structure battery core internal resistance higher
The problem of, thick core structure on the other hand can be solved the problem of the planarization that later stage charge and discharge process always occurs is poor；It is many
The battery core assembly thickness formed after individual battery core monomer is in parallel is more than 1cm, and this causes battery core assembly to have bigger capacity, therefore
As the soft bag lithium ionic cell made by this battery core monomer, not only production efficiency is high, production cost is low, but also with energy
The characteristics of density is high, battery capacity is big, and battery high rate during charging-discharging can also be improved.
Brief description of the drawings
The structural representation of anode pole pieces or cathode pole piece of the Fig. 1 disclosed in the embodiment of the present invention；
Fig. 2 is core winding both positive and negative polarity and barrier film placement location schematic diagram in first embodiment of the invention；
Fig. 3 is the structural representation after the completion of single battery core monomer winding in first embodiment；
Fig. 4 is that the battery core monomer shown in Fig. 3 crops the structural representation behind the tab welding area of edge；
Fig. 5 is three battery core monomers schematic diagram in parallel in first embodiment；
Fig. 6 is that the battery core assembly of three battery core monomer parallel connection formation in first embodiment welds the structural representation after big lug
Figure；
Fig. 7 is that the battery core assembly in Fig. 6 completes the structural representation after secondary encapsulation；
Fig. 8 is core winding both positive and negative polarity and barrier film placement location schematic diagram in second embodiment of the invention；
Fig. 9 is that the battery core assembly in second embodiment welds the structural representation after big lug；
Figure 10 is that the battery core assembly in Fig. 9 completes the structural representation after secondary encapsulation.
Wherein, 1 is coating, and 2 is are left white area, and 3 be anode pole piece, and 4 be cathode pole piece, and 5 be barrier film, and 6 be positive pole weld zone,
7 be negative pole weld zone, and 8 be positive pole ear, and 9 be negative lug.
Embodiment
One of core of the present invention is to provide a kind of soft bag lithium ionic cell, so as to reduce Large Copacity Soft Roll lithium ion
The production cost of battery, while enabling to Large Copacity soft-package battery that there is excellent planarization and preferable cycle life.
Another core of the present invention is to provide a kind of manufacture method of soft bag lithium ionic cell.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Disclosed in this invention soft bag lithium ionic cell, including battery core assembly and Soft Roll shell, wherein, battery core assembly by
Multiple battery core monomers parallel with one another are formed, and two neighboring battery core monomer is superimposed with each other, and any one battery core monomer is
The takeup type battery core monomer produced using winding method, this kind of battery core monomer can be also simply referred to as core, by multiple battery core monomers simultaneously
The thickness of the formed battery core assembly of connection is more than 1cm.
For the stacked mode of production, coiled its production efficiency of battery core monomer is higher, production cost
Lower, on the one hand multiple battery core monomer parallel ways structure stacked together can avoid takeup type structure battery core internal resistance higher
The problem of, thick core structure on the other hand can be solved the problem of the planarization that later stage charge and discharge process always occurs is poor；It is many
The battery core assembly thickness formed after individual battery core monomer is in parallel is more than 1cm, and this causes battery core assembly to have bigger capacity, therefore
As the soft bag lithium ionic cell made by this battery core monomer, not only production efficiency is high, production cost is low, but also with energy
The characteristics of density is high, battery capacity is big, and battery high rate during charging-discharging can also be improved.
In soft bag lithium ionic cell disclosed in the embodiment of the present invention, although the thickness of battery core assembly is more than 1cm, still
The thickness of any one battery core monomer is no more than 1cm, and the assembling mode of multiple battery core monomers overlappings and parallel connection has larger excellent
Gesture, this can effectively solve the problem of planarization that occurs in later stage charge and discharge process at present present in thick battery core is poor.
Need to illustrate, the soft bag lithium ionic cell in the embodiment of the present invention to the lug mode of battery core monomer not
It is construed as limiting, lug can be any one in monopole ear, multi pole ears or full lug, certainly, soft in order to effectively improve
The full lug of use of the lug of battery core monomer in the overall high rate performance of bag lithium ion battery, the present embodiment preferably.
In actual production process, rolling for battery core monomer is relied on formed by specific volume pin, and volume pin is determined in itself
The width of battery core monomer, therefore, battery core monomer and rolls the width edge that direction identical side is battery core monomer under normal circumstances,
And roll the length sides that the vertical side in direction is usually battery core monomer with battery core monomer.Battery core monomer completes generally to be in square after rolling
Shape, and the positive pole ear 8 and negative lug 9 of battery core monomer can be symmetrically distributed in the both sides on battery core monomer length direction,
Can also be that positive pole ear 8 and negative lug 9 are respectively positioned on a side of battery core monomer, as shown in Fig. 6 and Fig. 9.
According to the capacitance of battery core monomer and Shi Jishiyong demand, 2~7 battery core monomer parallel connections can be formed battery core
Assembly, then rushes the works such as shell, top side seal, fluid injection, heat cold pressing, chemical conversion, fixture baking, secondary encapsulation and partial volume by follow-up
Sequence, it is multiple battery core monomers Large Copacity soft bag lithium ionic cell in parallel that structure, which is made,.
Additionally provided in the present invention and disclose a kind of manufacture method of soft bag lithium ionic cell, the manufacture method is specifically included
Following steps：
1) the battery core monomer is made in winding after stacking anode pole piece 3, barrier film 5 and cathode pole piece 4, in order to prevent analysis
Safety issue caused by lithium, needs the coating 1 for ensureing cathode pole piece 4 on battery core monomer length direction during stacking
Two ends more than the two ends in the longitudinal direction of coating 1 of anode pole piece 3, that is to say, that the coating 1 of cathode pole piece 4 needs
The coating 1 of anode pole piece 3 is covered, short circuit is caused in order to prevent both positive and negative polarity from contacting with each other, barrier film 5 is in battery core monomer length side
Upward two ends will exceed the two ends of the coating 1 of cathode pole piece 4 in the longitudinal direction.Need to illustrate, the present embodiment
In " battery core monomer length direction " specifically refer to and the battery direction that to roll direction vertical.In fact, anode pole piece 3, negative pole
The supplied materials of pole piece 4 and barrier film 5 is in strip, roll direction be really along the anode pole piece 3 of supplied materials, cathode pole piece 4 with
And the length direction of barrier film 2 is carried out, and the direction vertical with rolling direction, it is actual for anode pole piece 3, cathode pole piece 4 and
The width of the supplied materials of barrier film 5, therefore those skilled in the art should be noted the direction transformation in being described at this, roll completion
The length direction of battery core monomer, actual is the width of anode pole piece 3, cathode pole piece 4 and the supplied materials of barrier film 5；
2) it is in parallel after the battery core monomer at least two above-mentioned steps is overlapped to form overall, then in the overall positive pole
Weld zone 6 forms battery core assembly, and the thickness of the battery core assembly after welding positive pole ear, the welding of negative pole weld zone 7 negative lug
Degree is more than 1cm, to ensure the capacity of battery core assembly；
3) soft bag lithium ionic cell is made by subsequent treatment in battery core assembly, so-called subsequent treatment generally include to rush shell,
The techniques such as top side seal, fluid injection, cold-hot pressure, chemical conversion, fixture baking, secondary encapsulation and partial volume, because above-mentioned technique is soft at present
Maturation process in bag lithium ion battery production process, therefore above-mentioned technique is no longer repeated in the present embodiment.
By the soft bag lithium ionic cell made by the above method, battery core assembly is by multiple battery core monomer shapes parallel with one another
Into, and battery core monomer is produced by way of winding, and the thickness of battery core assembly is more than 1cm, coiled battery core monomer
Production efficiency is high, and production cost is low, and on the one hand multiple battery core monomer parallel ways structure stacked together can avoid winding
The problem of formula structure battery core internal resistance is higher, on the other hand can solve thick core structure in putting down that later stage charge and discharge process always occurs
The problem of whole property is poor；The battery core assembly thickness formed after multiple battery core monomers are in parallel is more than 1cm, and this causes battery core assembly to have
Have a bigger capacity, thus as the soft bag lithium ionic cell disclosed in above-described embodiment manufacture method made Soft Roll
Not only production efficiency is high for lithium ion battery, production cost is low, but also has the characteristics of energy density is high, battery capacity is big, and
And battery high rate during charging-discharging can also be improved.
The step 1 of above-described embodiment) in the thickness of made battery core monomer be usually 5mm-10mm, width is 5cm-
15cm (numerical value generally according to volume pin difference and change), length be 10cm-25cm (numerical value according to anode pole piece,
The width of cathode pole piece and barrier film supplied materials is different and changes), above-mentioned numerical intervals include endpoint value.
It refer in addition to coating 1 to also have on Fig. 1, Fig. 2 and Fig. 8, anode pole piece 3 and cathode pole piece 4 and be left white area 2,
Complete in the full lug battery core monomer after rolling up, positive pole is left white area for positive pole weld zone 6, negative pole is left white area for negative pole weld zone 7,
In step 1) in also include：It is equal to the two ends of positive pole weld zone 6 and negative pole weld zone 7 on the width of battery core monomer
It is cut out, cuts out size for 0.5cm-1cm.
Positive pole ear 8 and the thickness of negative lug 9 are 0.1mm-0.5mm, and width is 3cm-10cm, lug width with
The width of battery core monomer is consistent.
In step 2) in, the preferred use ultrasonic bonding of the welding of positive pole ear 8 and negative lug 9, positive pole ear 8 is
Aluminum metal film, negative lug 9 is one kind in nickel sheet metal, nickel copper-plated metal piece or corronil sheet metal.
The manufacture method of above-mentioned soft bag lithium ionic cell is further elaborated on specifically manufacturing embodiment below,
As shown in Fig. 2 to Fig. 7, left and right directions in Fig. 2 is width, and above-below direction is length direction, and battery core monomer is along length
Direction is wound.
First specific manufacture embodiment：
Be 134mm by coating widths, the anode pole piece that to be left white sector width be 12mm, coating widths be 140mm, to be left white area wide
The membrane winding that the cathode pole piece that degree is 11mm and width are 144.5mm is into core, and it is 2mm to make a, and b is 4mm, and c is 3mm and d is
1.5mm, the width of the battery core monomer of acquisition is 8cm, and length is 16.1cm, and thickness is 8mm.Edge is left white area and cuts away 1cm, so
3 full lug battery core monomers in parallel afterwards, thickness be 0.15mm, width 5cm the big metal tabs of aluminium be ultrasonically bonded to positive pole
Weld zone, thickness be 0.15mm, width 5cm the big metal tabs of nickel copper facing be ultrasonically bonded to negative pole weld zone.Afterwards, lead to
Shell, top side seal, fluid injection, heat cold pressing, chemical conversion, fixture baking, secondary encapsulation and partial volume are overshooted, it is multiple full lug electricity to obtain structure
Core monomer Large Copacity soft-package battery in parallel, both positive and negative polarity is symmetrically distributed in the two ends of battery.The capacity of made battery core monomer
For 16.2Ah, 3 battery core assembly thickness in parallel formed are 27mm, and capacity is 48.6Ah, and internal resistance is that 3.0m Ω, 1.5C electric discharges are held
Measure as the 98% of 0.2C.
Need to illustrate, in above-described embodiment, a is the size that negative pole coating exceeds positive pole coating at one end, and b is
Negative pole coating exceeds the size of positive pole coating in the other end, and c is the size that barrier film exceeds negative pole coating at one end, and d is that barrier film exists
The other end exceeds the size of negative pole coating.
Second specific manufacture embodiment：
As shown in Fig. 2 to Fig. 7, the left and right directions in Fig. 2 is width, and above-below direction is length direction, battery core list
Body is wound along its length.
Be 120mm by coating widths, the anode pole piece that to be left white sector width be 14mm, coating widths be 126mm, to be left white area wide
The membrane winding that the cathode pole piece that degree is 10mm and width are 132mm is into battery core monomer, and it is 2mm to make a, and b is 4mm, and c is 3mm and d
For 3mm, the width of the battery core monomer of acquisition is 8.2cm, and length is 14.8cm, and thickness is 5.5mm.Edge is left white area to cut away
1cm, then 4 full lug battery core monomers in parallel, thickness be 0.2mm, width 6cm the big metal tabs of aluminium be ultrasonically bonded to
Positive pole weld zone, thickness be 0.2mm, width 6cm the big metal tabs of nickel copper facing be ultrasonically bonded to negative pole weld zone.It
Afterwards, by rushing shell, top side seal, fluid injection, heat cold pressing, chemical conversion, fixture baking, secondary encapsulation and partial volume, acquisition structure is multiple complete
Lug battery core monomer Large Copacity soft bag lithium ionic cell in parallel, both positive and negative polarity is symmetrically distributed in the two ends of battery.What manufacture was formed
The capacity of single battery core monomer is 10.1Ah, and the battery core assembly thickness of 4 formation in parallel is 26mm, and capacity is 40.4Ah, interior
Hinder for 1.8m Ω, 1.5C discharge capacities are the 98.5% of 0.2C.
Implication in the specific manufacture embodiment representated by a, b, c, d is identical with first specific manufacture embodiment.
3rd specific embodiment：
As shown in Fig. 8 to Figure 10, the above-below direction in Fig. 8 is width, and left and right directions is length direction, battery core list
Body is wound along its length.
Be 71mm positive pole coating widths, the anode pole piece that to be left white width be 9mm be die cut, make the metal welding for being left white area
Sector width is connect for 5cm；Be 74mm negative pole coating widths, the cathode pole piece that to be left white width be 7mm be die cut, make to be left white area
Metal welding sector width is 5cm, then the barrier film that width is 80mm, and both positive and negative polarity pole piece is wound, and it is 2mm to make a, and b is
1mm, c are 4mm, and d is 2mm, and acquisition width is 80mm, and length is 140mm, and thickness is 5.5mm battery core monomer.Pass through parallel connection
Mode, 4 battery core monomers are overlapping, in both positive and negative polarity tab welding area by way of ultrasonic bonding, weld both positive and negative polarity lug.
Lug size is：Thickness 0.2mm, width is 4mm, and positive pole ear is aluminium pole ears, and negative lug is that nickel plates copper polar ear.Pass through afterwards
Shell, top side seal, fluid injection, heat cold pressing, chemical conversion, fixture baking, secondary encapsulation and partial volume are rushed, acquisition structure is multiple by cross cutting mode
The battery core monomer of lug design Large Copacity soft-package battery in parallel is carried out, both positive and negative polarity lug is distributed in the same side of battery, such as Fig. 9
Shown in Figure 10.
Need to illustrate, anode pole piece, cathode pole piece and barrier film should overlap mode, be simply in Fig. 2 and Fig. 8
It is easy to the relation in clearly displaying three's size, all parts, which only stagger, have been intercepted one section and be indicated.
Soft bag lithium ionic cell provided by the present invention and its manufacture method are described in detail above.Herein should
The principle and embodiment of the present invention are set forth with specific case, the explanation of above example is only intended to help and managed
Solve the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, not departing from
On the premise of the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into this hair
In bright scope of the claims.
Claims (14)
1. a kind of soft bag lithium ionic cell, including battery core assembly and Soft Roll shell, it is characterised in that the battery core assembly includes many
Individual battery core monomer parallel with one another, and the battery core monomer is takeup type battery core monomer, the thickness of the battery core assembly is more than
1cm。
2. soft bag lithium ionic cell according to claim 1, it is characterised in that the thickness of any one battery core monomer is equal
No more than 1cm.
3. soft bag lithium ionic cell according to claim 1, it is characterised in that the lug of the battery core monomer is full pole
Any one in ear, multi pole ears or monopole ear.
4. soft bag lithium ionic cell according to claim 1, it is characterised in that the battery core monomer is rectangular, the electricity
The positive pole ear and negative lug of core monomer are respectively symmetrically distributed in the both sides on the battery core monomer length direction.
5. soft bag lithium ionic cell according to claim 1, it is characterised in that the battery core monomer is rectangular, the electricity
The positive pole ear and negative lug of core monomer are respectively positioned on a side of the battery core monomer.
6. the soft bag lithium ionic cell according to claim 1-5 any one, it is characterised in that wrapped in the battery core assembly
Include 2~7 battery core monomers parallel with one another.
7. a kind of manufacture method of soft bag lithium ionic cell, it is characterised in that including step：
1) the battery core monomer is made in winding after stacking anode pole piece, barrier film and cathode pole piece；
2) it is in parallel after battery core monomer described at least two is overlapped to form overall, then in the overall positive pole weld zone weldering
The battery core assembly is formed after connecing positive pole ear, negative pole weld zone welding negative lug, the thickness of the battery core assembly is more than
1cm；
3) soft bag lithium ionic cell is made by subsequent treatment in the battery core assembly.
8. manufacture method according to claim 7, it is characterised in that the subsequent treatment includes：Rush shell, top side seal, note
Liquid, heat cold pressing, chemical conversion, fixture baking, secondary encapsulation and partial volume.
9. manufacture method according to claim 7, it is characterised in that the step 1) in the battery core monomer that is made be in square
Shape, the thickness of the battery core monomer is 5mm-10mm, and width is 5cm-15cm, and length is 10cm-25cm.
10. manufacture method according to claim 9, it is characterised in that in the battery core monomer, positive pole is left white area for positive pole
Tab welding area, negative pole is left white area for negative lug weld zone, the step 1) in also include, in the width of the battery core monomer
On direction, the two ends of the positive pole ear weld zone and the negative lug weld zone are cut out, the amount of cutting out is
0.5cm-1cm。
11. manufacture method according to claim 9, it is characterised in that the positive pole ear and the negative lug
Thickness is 0.1mm-0.5mm, and width is 3cm-10cm.
12. manufacture method according to claim 7, it is characterised in that the step 1) in made battery core monomer,
On the length direction of battery core monomer, coating of the coating two ends on the anode pole piece on the cathode pole piece is described
Coating of the two ends of barrier film on the cathode pole piece.
13. manufacture method according to claim 7, it is characterised in that the step 2) it is middle using described in ultrasonic bonding
Positive pole ear and the negative lug.
14. manufacture method according to claim 7, it is characterised in that the positive pole ear is aluminum metal film, the negative pole
Lug is one kind in nickel sheet metal, nickel copper-plated metal piece or corronil sheet metal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647960.0A CN107293809A (en) | 2017-08-01 | 2017-08-01 | A kind of soft bag lithium ionic cell and its manufacture method |
| PCT/CN2018/098068 WO2019024873A1 (en) | 2017-08-01 | 2018-08-01 | Soft pack lithium ion battery and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647960.0A CN107293809A (en) | 2017-08-01 | 2017-08-01 | A kind of soft bag lithium ionic cell and its manufacture method |
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| CN107293809A true CN107293809A (en) | 2017-10-24 |
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| CN201710647960.0A Pending CN107293809A (en) | 2017-08-01 | 2017-08-01 | A kind of soft bag lithium ionic cell and its manufacture method |
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| WO (1) | WO2019024873A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019024873A1 (en) * | 2017-08-01 | 2019-02-07 | 格力电器（武汉）有限公司 | Soft pack lithium ion battery and manufacturing method therefor |
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| WO2019024873A1 (en) * | 2017-08-01 | 2019-02-07 | 格力电器（武汉）有限公司 | Soft pack lithium ion battery and manufacturing method therefor |
| CN111430597A (en) * | 2019-01-09 | 2020-07-17 | 比亚迪股份有限公司 | Monomer battery, power battery package and electric motor car |
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| CN110948111A (en) * | 2019-12-09 | 2020-04-03 | 多氟多新能源科技有限公司 | Composite welding method for tab of soft package lithium ion battery |
| CN110948111B (en) * | 2019-12-09 | 2022-02-15 | 多氟多新能源科技有限公司 | Composite welding method for tab of soft package lithium ion battery |
| CN111725552A (en) * | 2020-08-05 | 2020-09-29 | 广州鹏辉能源科技股份有限公司 | Button cell and manufacturing method thereof |
| CN112349950A (en) * | 2020-11-30 | 2021-02-09 | 蜂巢能源科技有限公司 | HEV soft package battery core and battery pack |
| CN112531295A (en) * | 2020-12-22 | 2021-03-19 | 厦门海辰新能源科技有限公司 | Lithium ion battery structure and tab electric connection method |
| CN113078407A (en) * | 2021-04-29 | 2021-07-06 | 武汉蔚能电池资产有限公司 | High-capacity battery module with small-capacity battery cells in dual parallel connection and recycling method thereof |
| CN113078407B (en) * | 2021-04-29 | 2023-12-26 | 武汉蔚能电池资产有限公司 | High-capacity battery module with small-capacity battery cells connected in parallel in double mode and recycling method thereof |
| CN114069127A (en) * | 2021-12-08 | 2022-02-18 | 欣旺达电动汽车电池有限公司 | Battery cell module |
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