CN107171028A - A kind of takeup type battery core and battery - Google Patents
A kind of takeup type battery core and battery Download PDFInfo
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- CN107171028A CN107171028A CN201710552328.8A CN201710552328A CN107171028A CN 107171028 A CN107171028 A CN 107171028A CN 201710552328 A CN201710552328 A CN 201710552328A CN 107171028 A CN107171028 A CN 107171028A
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- active material
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- lug
- battery core
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- 239000011149 active material Substances 0.000 claims description 74
- 238000004804 winding Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 7
- 229910001416 lithium ion Inorganic materials 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 6
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052744 lithium Inorganic materials 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000005183 dynamical system Methods 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 21
- 238000013461 design Methods 0.000 description 9
- 238000003466 welding Methods 0.000 description 9
- 230000000977 initiatory effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 1
- 239000006245 Carbon black Super-P Substances 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound 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
-
- 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)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
A kind of lithium rechargeable battery of takeup type battery core the invention discloses takeup type battery core and containing such a structure.The battery is compared with traditional coiled battery, with small volume, it is lightweight, save the features such as Material Cost, energy density are high, specific energy is high, consumer electronics product, energy-storage system, the power supply of dynamical system are suitable as, being especially suitable for aircraft, electric vehicle etc. needs the electrical equipment of high current high power charging-discharging.
Description
Technical field
The present invention relates to technical field of lithium ion secondary, and in particular to a kind of takeup type battery core and contains such a structure
Volume
The lithium rechargeable battery of wound battery core.
Background technology
Lithium rechargeable battery has the advantages that high voltage, high-energy-density, is widely used in consumer electronics product, storage
Energy system, the power supply of dynamical system, volume is smaller, weight lighter, capacity is bigger, is always the development side of lithium rechargeable battery
To.The demand of the electrical equipment of high current high power charging-discharging, lithium ion two are needed recently as aircraft, electric vehicle etc.
Primary cell needs to have high charge-discharge magnification and low resistance, also reduces volume with greater need for continuation on this basis, mitigates weight
Amount, increases capacity.
To prepare high multiplying power lithium ion secondary cell, general existing following technical scheme：
The first technical scheme such as patent document CN104600250A and CN105161673A：It is welded with electrode plates
Multiple lugs, and paste Protection glue band in welding position.The shortcoming of this kind of method is：Soldering polar ear is simultaneously taped and occupies coating
Powder position, capacity is smaller；Lug and adhesive tape in welding can increase cell thickness, take volume；Need multiple welding, reliability
Difference.
Second of technical scheme such as patent document CN204885269U and CN205543006U：In electrode plates side or two
Paper tinsel is stayed in side, and will stay paper tinsel position be cut into suitable shape and with outer tab welding.This kind of technical scheme actually implement when and
In the embodiment of patent document, foil two sides powder is typically designed as equal length (as shown in Fig. 9 Figure 10).After the coiling,
As shown in figure 11, material of the R14 positions portion of material of first electrode not with second electrode is corresponding in this kind of mode, it is impossible to send out
Capacity is waved, and takes cell thickness and battery weight in vain, and wastes Material Cost.
The third technical scheme such as patent document CN204230364U, is certain knot of the first scheme and second scheme
Close.
A kind of lithium rechargeable battery of takeup type battery core the invention discloses takeup type battery core and containing such a structure.
The battery is compared with traditional coiled battery, with small volume, lightweight, saving Material Cost, energy density height, specific energy
High the features such as, consumer electronics product, energy-storage system, the power supply of dynamical system are suitable as, are especially suitable for aircraft, electric car
Etc. need the electrical equipment of high current high power charging-discharging.
The content of the invention
It is an object of the invention to：A kind of lithium ion secondary of takeup type battery core and takeup type battery core containing such a structure
Battery.
The present invention provides a kind of takeup type battery core, and its pole piece is designed as shown in Fig. 1 Fig. 2, takeup type battery core sectional view such as Fig. 3
It is shown, takeup type battery core front elevation as shown in figure 4, winding battery core lateral plan as shown in figure 5, including：First electrode piece：By
First collector, the active material layer A for being coated in the first collector one side, the active material for being coated in the first collector another side
Layer B compositions；
Second electrode piece：By the second collector, it is coated in the active material layer C of the second collector one side, is coated in second
The active material layer D compositions of collector another side；
Barrier film：Between first electrode piece and second electrode piece, they are kept apart；
First lug：It is connected by the first lug exit with the first collector；
Second lug：It is connected by the second lug exit with the second collector；
The unilateral or bilateral of first collector leaves the first lug exit at one or more intervals；
The unilateral or bilateral of second collector leaves the second lug exit at one or more intervals；
The active material layer A for being coated in the first collector two sides is different with active material layer B coated length, there is one
Position only has one side to coat active material layer and the back side without coating, is the empty paper tinsel of the first one side；
The active material layer C for being coated in the second collector two sides is different with active material layer D coated length, there is one
Position only has one side to coat active material layer and the back side without coating, is the empty paper tinsel of the second one side.
In general, described first electrode piece is negative plate, described second electrode piece is positive plate.
By designing the spacing of multiple first lug exits and multiple second lug exits, it can cause after the coiling
It is overlapped in multiple first lug exits and after the coiling same position；With multiple second lug exits and in winding
After be overlapped in same position, as shown in Figure 4.
The position of first one side sky paper tinsel is located at first electrode piece and winds the end (S1) started, that is, is located at after winding in core
Portion.The position of second one side sky paper tinsel is located at second electrode piece and winds the afterbody (E2) terminated, that is, is located at after winding outside core.Go out
In security consideration, charging analysis lithium is prevented, active material layer C and activity is completely covered in active material layer A and active material layer B need
Material layer D.Therefore, when pole piece is designed and coated：Active material layer A coated length is more than or equal to active material layer C coating
Length；Active material layer B coated length is more than or equal to active material layer D coated length.Active material layer A and active material
Layer B coating width is respectively greater than active material layer C and active material layer D coating width；During winding alignment：First collector
With uncoated active material layer C or active material layer D on the empty paper tinsel of the first one side directly position of corresponding second pole piece.
Except in addition to thickness direction is thinner, in the length direction of battery core, we are preferably by folding tab welding position
Method save length direction space so that battery be can be made smaller, as shown in Fig. 4 Fig. 5：By the first lug exit with
The part of first lug connection, folds to cell thickness direction after bending；What the second lug exit was connected with the second lug
Part, folds to cell thickness direction after bending.
In addition, in the case where battery core demand is especially thick, a core is likely difficult to reach so thickness, as shown in figure 5, can
Turn into a battery core so that multiple core are connected on same lug.
Heretofore described active material is active material layer used in conventional battery, without specifically formula or
Component requirements, can be used the active material layer used in known battery.The improvement of this patent is mainly to inside battery
New construction.
The present invention also provides a kind of lithium ion battery, it is characterized in that including outer packing and one or more as described in 1~9
Battery core.
Compared with prior art, the advantage of the invention is that：Thickness of thin, length are small, lightweight, save Material Cost, energy
Metric density is high, specific energy is high, applied to equipment such as the aircraft such as unmanned plane, electric automobiles, can significantly mitigate weight, lifting and hold
Amount, raising cruising time and course continuation mileage.
Brief description of the drawings：
The top view and sectional view of Fig. 1 first electrodes piece (1).
The top view and sectional view of Fig. 2 second electrodes piece (2).
Fig. 3 takeup type battery core sectional views.
Front elevation after Fig. 4 takeup type battery cores.
Fig. 5 takeup types battery core folds lug exit front elevation.
Fig. 6 takeup type battery core side views (corresponding diagram 4).
Fig. 7 takeup types battery core folds lug exit side view (corresponding diagram 5).
After the multiple takeup type battery cores of Fig. 8 (the first core and the second core) are connected, lug exit, side view are folded.
The top view and sectional view of Fig. 9 comparative example first electrode pieces (R1).
The top view and sectional view of Figure 10 comparative example second electrode pieces (R2).
Figure 11 comparative example takeup type battery core sectional views.
Description of symbols：
1 first electrode piece；
11 first collectors；
12 first active material layers (short)；
13 first active material layers (length)；
14 first one sides sky paper tinsel；
111 first lug exits；
S1 first electrodes piece winds initiating terminal；
E1 first electrodes piece winding terminates end；
2 second electrode pieces；
21 second collectors；
22 second active material layers (short)；
23 second active material layers (length)；
24 second one sides sky paper tinsel；
211 second lug exits；
S2 second electrodes piece winds initiating terminal；
E2 second electrodes piece winding terminates end；
3 barrier films；
4 first lugs；
5 second lugs；
R1 comparative example first electrode pieces；
The collector of R11 comparative examples first；
The active material layer of R12 comparative examples first (front)；
The active material layer of R13 comparative examples first (reverse side)；
The active material layer of R14 comparative examples first (just in face of capacity without contribution part)；
R111 comparative examples the first lug exit；
RS1 comparative example first electrodes piece winds initiating terminal；
RE1 comparative example first electrodes piece winding terminates end；
R2 comparative example second electrode pieces；
The collector of R21 comparative examples second；
The active material layer of R22 comparative examples second (front)；
The active material layer of R23 comparative examples second (reverse side)；
R211 comparative examples the second lug exit；
RS2 comparative example second electrodes piece winds initiating terminal；
RE2 comparative example second electrodes piece winding terminates end.
Embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect are more clearly understood, tie below
Drawings and Examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Battery manufacture explanation：
The preparation of anode pole piece：Positive electrode active materials cobalt acid lithium, bonding agent Kynoar (PVDF) conductive agent Super-P
According to 96:2:2 weight ratio is added to stirring homogenate in 1-METHYLPYRROLIDONE (NMP) and anode sizing agent is made；By anode sizing agent
Double spread obtains anode pole piece on plus plate current-collecting body after drying, compacting, cutting, cut-parts, soldering polar ear.
The preparation of cathode pole piece：Negative active core-shell material Delanium, butadiene-styrene rubber (SBR), sodium carboxymethylcellulose
(CMC), according to 95:2.5:2.5 ratio adds stirring homogenate in deionized water and cathode size is made；By the two-sided painting of cathode size
Cloth obtains cathode pole piece on negative current collector after drying, compacting, cutting, cut-parts, soldering polar ear.
It should be noted that：In following comparative example and embodiment, collector foil is identical, the unit area of both positive and negative polarity pole piece
Coated weight it is identical, the coating width of both positive and negative polarity pole piece is identical, and the first lug exit 111 and the second lug exit 211 are counted
Amount is identical, and coated length is different according to battery size and the design of different winding-structures.
The preparation of electrolyte：From the lithium hexafluoro phosphate that concentration is 1M as lithium salts, with ethylene carbonate (EC)：Carbonic acid two
Ethyl ester (DEC)：Methyl ethyl carbonate (EMC) is according to 30:30:40 weight is used for solvent, additionally containing it assures that performance
Additive.
The preparation of lithium ion battery：The cathode pole piece and anode pole piece that are prepared according to previous process and barrier film are carried out
Assembling, be made battery battery core, battery battery core is fitted into aluminum plastic film flexible package, to it inside injection electrolyte after seal, progress
Preliminary filling, and it is melted into obtained lithium rechargeable battery.
Takeup type battery core has：First electrode piece 1：By the first collector 11, it is coated in the activity of the first collector one side
Material layer A12, the active material layer B13 compositions for being coated in the first collector another side；
Second electrode piece 2：By the second collector 21, it is coated in the active material layer C22 of the second collector one side, is coated in
The active material layer D23 compositions of second collector another side；
Barrier film 3：Between first electrode piece 1 and second electrode piece 2, they are kept apart；
First lug 4：It is connected by the first lug exit 111 with the first collector 11；
Second lug 5：It is connected by the second lug exit 211 with the second collector 21；
The unilateral or bilateral of first collector 11 leaves the first lug exit 111 at one or more intervals；
The unilateral or bilateral of second collector 21 leaves the second lug exit 211 at one or more intervals；
The active material layer A12 for being coated in the two sides of the first collector 11 is different with active material layer B13 coated length；
Only have one side to coat active material layer in the presence of a position on first collector 11, be the empty paper tinsel 14 of the first one side；
The active material layer C22 for being coated in the two sides of the second collector 21 is different with active material layer D23 coated length；
Only have one side to coat active material layer in the presence of a position on second collector 21, be the empty paper tinsel 24 of the second one side.
The position of first one side sky paper tinsel 14 is located at first electrode piece 1 and winds the end S1 started, that is, is located at core after winding
It is internal.The position of second one side sky paper tinsel 24 is located at second electrode piece 2 and winds the afterbody E2 terminated, that is, is located at after winding outside core
Portion.
Active material layer A12 coated length is more than or equal to active material layer C22 coated length；Active material layer B13
Coated length be more than or equal to active material layer D23 coated length.Active material layer A12 and active material layer B13 coating
Width is respectively greater than active material layer C22 and active material layer D23 coating width.First collector 11 and the empty paper tinsel of the first one side
Uncoated active material layer C22 or active material layer D23 on the position of 14 direct corresponding second pole pieces 2.
The part that first lug exit 111 is connected with the first lug 4, folds to cell thickness direction after bending；The
The part that two lug exits 211 are connected with the second lug 5, folds to cell thickness direction after bending.With multiple first
Lug exit 111 is simultaneously overlapped in same position after the coiling；With multiple second lug exits 211 and overlapping after the coiling
In same position.
Method of testing explanation：
Volume test：At 25 DEG C, with 800mA electric current constant-current charge to 4.35V, then in 4.35V constant-voltage charges to electricity
Stream is less than 80mA, shelves 5 minutes, with 800mA electric currents constant-current discharge to 3.0V, using this discharge capacity as capacity.
The parameters such as thickness, length, weight are tested according to known methods.The measurement site of length is represented such as Fig. 4,5,6,7
Shown (size in non-picture) is battery core bottom to tab top length.
Comparative example 1
Explanation is made with reference to battery and prepares lithium rechargeable battery, and negative plate design such as Fig. 9, positive plate designs such as Figure 10,
Winding-structure such as Figure 11, tab welding assembling such as Fig. 4, Fig. 6.
Embodiment 1
Explanation, which is made, with reference to battery prepares lithium rechargeable battery, negative plate design such as Fig. 1, positive plate design such as Fig. 2, volume
Around structure such as Fig. 3, tab welding assembling such as Fig. 4, Fig. 6.
Embodiment 2
Explanation, which is made, with reference to battery prepares lithium rechargeable battery, negative plate design such as Fig. 1, positive plate design such as Fig. 2, volume
Around structure such as Fig. 3, tab welding assembling such as Fig. 5, Fig. 7.
Embodiment 3
Explanation, which is made, with reference to battery prepares lithium rechargeable battery, negative plate design such as Fig. 1, positive plate design such as Fig. 2, volume
Around structure such as Fig. 3, two core, parallel connection assembling, tab welding assembling such as Fig. 5, Fig. 8 are rolled up.
Comparative example and each embodiment respectively make 100 batteries, its capacity, thickness, length, the average value such as following table of weight
It is shown.
From experimental result it can be seen that, it is capacity height, thickness of thin, lightweight, more optimizing from folding lug exit
Scheme when (embodiment 2 and 3), battery length is shorter, advantageous on volume, weight and capacity.
According to above-mentioned principle, the present invention can also carry out appropriate change and modification to above-mentioned embodiment.Therefore, this hair
The bright embodiment for being not limited to be explained above and describing, some modifications and changes to the present invention should also be as falling into this
In the scope of the claims of invention.Although in addition, having used some specific terms, these terms in this specification
Merely for convenience of description, any limitation is not constituted to the present invention.
Claims (10)
1. a kind of takeup type battery core, including：
First electrode piece (1)：By the first collector (11), it is coated in the active material layer A (12) of the first collector one side, coats
Constituted in the active material layer B (13) of the first collector another side；
Second electrode piece (2)：By the second collector (21), it is coated in the active material layer C (22) of the second collector one side, coats
Constituted in the active material layer D (23) of the second collector another side；
Barrier film (3)：Between first electrode piece (1) and second electrode piece (2), they are kept apart；
First lug (4)：It is connected by the first lug exit (111) with the first collector (11)；
Second lug (5)：It is connected by the second lug exit (211) with the second collector (21)；
It is characterized in that：
The unilateral or bilateral of first collector (11) leaves the first lug exit (111) at one or more intervals；
The unilateral or bilateral of second collector (21) leaves the second lug exit (211) at one or more intervals；
The active material layer A (12) for being coated in the first collector (11) two sides is different with active material layer B (13) coated length；
Only have one side to coat active material layer in the presence of a position on the first collector (11), be the empty paper tinsel (14) of the first one side；
The active material layer C (22) for being coated in the second collector (21) two sides is different with active material layer D (23) coated length；
Only have one side to coat active material layer in the presence of a position on the second collector (21), be the empty paper tinsel (24) of the second one side.
2. takeup type battery core according to claim 1, it is characterised in that：Described first electrode piece (1) is negative plate, institute
The second electrode piece (2) stated is positive plate.
3. takeup type battery core () according to claim 1, it is characterised in that：The position of first one side sky paper tinsel (14) is located at the
The end (S1) that one electrode slice (1) winding starts, that is, be located inside core after winding.
4. takeup type battery core () according to claim 1, it is characterised in that：The position of second one side sky paper tinsel (24) is located at the
The afterbody (E2) that two electrode slices (2) winding terminates, that is, be located at outside core after winding.
5. takeup type battery core () () according to claim 2, it is characterised in that：Active material layer A (12) coated length
More than or equal to the coated length of active material layer C (22)；Active material layer B (13) coated length is more than or equal to active material layer
D (23) coated length.
6. takeup type battery core () () according to claim 2, it is characterised in that：Active material layer A (12) and active material
Layer B (13) coating width is respectively greater than active material layer C (22) and active material layer D (23) coating width.
7. takeup type battery core according to claim 1, it is characterised in that：First collector (11) and the empty paper tinsel of the first one side
(14) uncoated active material layer C (22) or active material layer D (23) directly on the position of corresponding second pole piece (2).
8. takeup type battery core according to claim 1, it is characterised in that：First lug exit (111) and the first lug
(4) part of connection, folds to cell thickness direction after bending；Second lug exit (211) is connected with the second lug (5)
Part, cell thickness direction is folded to after bending.
9. takeup type battery core according to claim 1, it is characterised in that：With multiple first lug exits (111) simultaneously
Same position is overlapped in after the coiling；It is overlapped in multiple second lug exits (211) and after the coiling same position.
10. a kind of lithium ion battery, it is characterized in that including outer packing and one or more battery cores as described in 1~9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710552328.8A CN107171028A (en) | 2017-07-07 | 2017-07-07 | A kind of takeup type battery core and battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710552328.8A CN107171028A (en) | 2017-07-07 | 2017-07-07 | A kind of takeup type battery core and battery |
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Family
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| CN201710552328.8A Pending CN107171028A (en) | 2017-07-07 | 2017-07-07 | A kind of takeup type battery core and battery |
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Application publication date: 20170915 |