CN205828572U - Takeup type battery core - Google Patents
Takeup type battery core Download PDFInfo
- Publication number
- CN205828572U CN205828572U CN201620639627.6U CN201620639627U CN205828572U CN 205828572 U CN205828572 U CN 205828572U CN 201620639627 U CN201620639627 U CN 201620639627U CN 205828572 U CN205828572 U CN 205828572U
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- CN
- China
- Prior art keywords
- cleaning area
- pole piece
- bending section
- material layer
- battery core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 145
- 238000005452 bending Methods 0.000 claims abstract description 73
- 239000011149 active material Substances 0.000 claims abstract description 45
- 230000007423 decrease Effects 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 6
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims 1
- 238000007731 hot pressing Methods 0.000 abstract description 6
- 239000011888 foil Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002253 acid 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
- 239000005030 aluminium foil Substances 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
This utility model provides a kind of takeup type battery core, and it is wound by the isolating membrane between the first pole piece, the second pole piece and the first pole piece and the second pole piece and forms.First pole piece includes the first collector and the first active material layer being coated on the surface of the first collector, and the first pole piece is formed with the first planar portions and the first bending section in the often circle being wound into.First bending section has: the first cleaning area, extend to both sides from the flexural center of the first bending section and form, first cleaning area includes being formed in first inside the first bending section in cleaning area, and first the first active material layer at cleaning area by partly or completely clear all.According in takeup type battery core of the present utility model, owing to the first active material layer at cleaning area in first is by partly or completely clear all, thus decrease the first active material layer when the first pole piece coiling to the constraint of lateral bend in the first collector, and then solve takeup type battery core breakage problem of the first pole piece in winding and/or hot pressing.
Description
Technical field
This utility model relates to field of batteries, particularly relates to a kind of takeup type battery core.
Background technology
Along with the development of lithium ion battery, in order to improve the energy density of battery, the thickness of the collector of selection is increasingly
Little.When selecting thinner foil (such as aluminium foil) as collector, along with in the compacted density of collector and the surface of collector
The increase of thickness of active material layer, for takeup type battery core, takeup type battery core can be produced in winding and hot pressing
Raw phenomenon of rupture, especially takeup type battery core be the part of bending when winding.
Currently for the foil of lower thickness, its compacted density cannot improve, and therefore can only select thicker foil, from
And limit the raising of battery energy density.
When takeup type battery core utilizes thinner foil as collector, takeup type battery core during hot pressing, pole piece
Inner round portion (the especially pole piece part of inner ring is in the position of bending when winding) phenomenon of rupture can occur.When inner ring pole
Sheet fracture after, if off two parts in a portion without lug arrange, then rupture without lug setting this part
Because son can not be conducted electricity again, the removal lithium embedded being no longer participate in lithium ion battery is worked, thus cause the energy density of lithium ion battery
Reduce；If off two parts the most still have lug to arrange, owing to fracture can make the sub-ability of monolithic conductive of pole piece decline,
The deintercalation speed of lithium ion reduces, thus causes energy density to decline.It addition, pole piece fracture can breaking part produce burr
Granule, has the risk piercing through barrier film, causes battery short circuit, affect battery safety.
Utility model content
In view of problem present in background technology, the purpose of this utility model is to provide a kind of takeup type battery core, its energy
Solve takeup type battery core breakage problem of pole piece in winding and/or hot pressing.
To achieve these goals, this utility model provides a kind of takeup type battery core, and it is by the first pole piece, the second pole piece
And the isolating membrane winding being arranged between the first pole piece and the second pole piece forms.First pole piece includes the first collector and coating
The first active material layer on the surface of the first collector, and the first pole piece is formed with the first plane in the often circle being wound into
Portion and the first bending section.Wherein, the first bending section has: the first cleaning area, prolongs to both sides from the flexural center of the first bending section
Stretching and form, the first cleaning area includes being formed in first inside the first bending section in cleaning area, and first at cleaning area
One active material layer is by partly or completely clear all.
The beneficial effects of the utility model are as follows:
According in takeup type battery core of the present utility model, bend from first owing to the first bending section of the first pole piece has
The first cleaning area that the flexural center in portion extends to both sides, and the first cleaning area includes being formed at inside the first bending section
Cleaning area in first, and in first, the first active material layer at cleaning area is by partly or completely clear all, thus decrease first
Active material layer when the first pole piece coiling to the constraint of lateral bend in the first collector, and then solve takeup type battery core volume
Around and/or hot pressing in the breakage problem of the first pole piece.Especially when the first collector uses ultra-thin foil and has bigger
Compacted density time, based on arranging the first cleaning area on the first bending section of the first pole piece, thus substantially increase takeup type
The energy density of battery core.
Accompanying drawing explanation
Fig. 1 is according to takeup type battery core of the present utility model winding schematic diagram in one embodiment；
Fig. 2 is the schematic diagram after the second pole piece in Fig. 1 launches；
Fig. 3 is the schematic diagram after the first pole piece in Fig. 1 launches；
Fig. 4 is according to takeup type battery core of the present utility model winding schematic diagram in another embodiment；
Fig. 5 is the schematic diagram after the second pole piece in Fig. 4 launches；
Fig. 6 is the schematic diagram after the first pole piece in Fig. 4 launches；
Fig. 7 is the top view of Fig. 3, wherein eliminates the mid portion of the first pole piece；
Fig. 8 is the variation in Fig. 7, wherein eliminates the mid portion of the first pole piece, and lug is formed by cross cutting.
Wherein, description of reference numerals is as follows:
1 first pole piece 22 second active material layer
11 first collector 23 second lug accommodating grooves
12 first active material layer P2 the second planar portions
13 first lug accommodating grooves B2 the second bending sections
P1 the first planar portions B21 the second cleaning area
Cleaning area in B1 the first bending section B211 second
B212 the second outer cleaning area, B11 the first cleaning area
Non-cleaning area in cleaning area B22 second in B111 first
The outer non-cleaning area of B112 first outer cleaning area B23 second
Non-cleaning area 3 isolating membrane in B12 first
B13 the first outer non-cleaning area 4 first lug
2 second pole piece 5 second lugs
21 second collectors
Detailed description of the invention
Describe in detail with reference to the accompanying drawings according to takeup type battery core of the present utility model.
Referring to figs. 1 through Fig. 8, and arranged by first pole piece the 1, second pole piece 2 according to takeup type battery core of the present utility model
Isolating membrane 3 winding between the first pole piece 1 and the second pole piece 2 forms.First pole piece 1 includes the first collector 11 and is coated in
The first active material layer 12 on the surface of the first collector 11, and the first pole piece 1 is formed with first in the often circle being wound into
Planar portions P1 and the first bending section B1.
Wherein, the first bending section B1 has: the first cleaning area B11, prolongs to both sides from the flexural center of the first bending section B1
Stretching and form, the first cleaning area B11 cleans in including being formed at cleaning area B111 in first inside the first bending section B1, and first
The first active material layer 12 at district B111 is by partly or completely clear all.
According in takeup type battery core of the present utility model, owing to the first bending section B1 of the first pole piece 1 has from first
The first cleaning area B11 that the flexural center of bending section B1 extends to both sides, and the first cleaning area B11 includes being formed at first
Cleaning area B111 in inside bending section B1 first, and in first the first active material layer 12 at the B111 of cleaning area by part or
Fully erased, thus decrease the first active material layer 12 when the first pole piece 1 winds to lateral bend in the first collector 11
Constraint, and then solve takeup type battery core breakage problem of the first pole piece 1 in winding and/or hot pressing.Especially when first
When collector 11 uses ultra-thin foil and has bigger compacted density, based on the first bending section B1 of the first pole piece 1
First cleaning area B11 is set, thus substantially increases the energy density of takeup type battery core.
According to takeup type battery core of the present utility model, in one embodiment, also may be used with reference to Fig. 1 and Fig. 4, the first bending section B1
Have: non-cleaning area B12 in first, be positioned at the inner side of the first bending section B1 and be in the first planar portions P1 and the first cleaning area
Part between B111, and in first, the first active material layer 12 at non-cleaning area B12 is not eliminated.
According to takeup type battery core of the present utility model, in one embodiment, from inside to outside 1～10 circles of the first pole piece 1
In the first bending section B1 can be provided with the first cleaning area B11.Further, in from inside to outside 1～6 circles of the first pole piece 1
The first bending section B1 can be provided with the first cleaning area B11.Certainly, the above-mentioned number of turns can be according to the first pole of actual takeup type battery core
The number of total coils of sheet 1 determines.
In one embodiment, may also include the first outer cleaning area B112 with reference to Fig. 1 and Fig. 3, the first cleaning area B11, formed
In the outside of the first bending section B1, and the first active material layer 12 at the first outer cleaning area B112 is by partly or completely clear all.
In one embodiment, also can have with reference to Fig. 1, the first bending section B1: the first outer non-cleaning area B13, be positioned at first
The outside of bending section B1 and be in the part between the first planar portions P1 and the first outer cleaning area B112, and the first outer non-cleaning area
The first active material layer 12 at B13 is not eliminated.
In one embodiment, the width from the inner ring multiple first cleaning area B11 in outer ring of the first pole piece 1 can be identical
Or it is different.Preferably, with reference to Fig. 1, Fig. 3, Fig. 4 and Fig. 6, the first pole piece 1 from inner ring multiple first cleaning in outer ring
The width of district B11 can successively decrease successively.
Specifically, the first pole piece 1 from inner ring in outer ring multiple first in the width of cleaning area B111 can be successively
Successively decrease, this be due to the first pole piece 1 bending time, the first pole piece 1 from inner ring in outer ring multiple first in cleaning area
The radius of curvature of B111 becomes larger, and from inner ring in outer ring multiple first in the produced internal stress of cleaning area B111
Be gradually reduced, therefore the first pole piece 1 from inner ring in outer ring multiple first in the width of cleaning area B111 can suitably depend on
Secondary successively decrease.
The width from the inner ring multiple first outer cleaning area B112 in outer ring of the first pole piece 1 can successively decrease successively.This is
Owing to the first pole piece 1 is when bending, the curvature from the inner ring multiple first outer cleaning area B112 in outer ring of the first pole piece 1 half
Footpath becomes larger, and is gradually reduced from the produced internal stress of the inner ring multiple first outer cleaning area B112 in outer ring, because of
The width from the inner ring multiple first outer cleaning area B112 in outer ring of this first pole piece 1 can successively decrease the most successively.
In one embodiment, the degree of depth from the inner ring multiple first cleaning area B11 in outer ring of the first pole piece 1 can be identical
Or it is different.Preferably, the degree of depth from the inner ring multiple first cleaning area B11 in outer ring of the first pole piece 1 can be successively decreased successively.?
Here remarking additionally, the thickness of active material layer based on the first active material layer 12 employing is different with compacted density, the
Width from the inner ring multiple first cleaning area B11 in outer ring and the degree of depth of one pole piece 1 can correspondingly adjust.Here supplement
Illustrate, for arrange on the same first bending section B1 of the first pole piece 1 first in cleaning area B111 and first outer clear
Wash district B112, due to the radius of curvature of the cleaning area B111 radius of curvature less than the first outer cleaning area B112 in first, thus ought
When this first bending section B1 of the first pole piece 1 bends, in first, internal stress produced by the B111 of cleaning area is relatively big, therefore exists
During design, the width of cleaning area B111 can be suitably larger than the width of the first outer cleaning area B112 in first.
In one embodiment, with reference to Fig. 1, Fig. 3, Fig. 4 and Fig. 6, the first pole piece 1 upon deployment, cleans in multiple first
District B111 is spaced, and multiple first outer cleaning area B112 are spaced.
In one embodiment, with reference to Fig. 1 and Fig. 4, the second pole piece 2 comprises the steps that the second collector 21；And second active matter
Matter layer 22, is coated on the surface of the second collector 21.Second pole piece 2 is formed with the second planar portions P2 in the often circle being wound into
Have with the second bending section B2, the second bending section B2: the second cleaning area B21, from the flexural center of the second bending section B2 to both sides
Extension forms, and the second cleaning area B21 includes being formed at cleaning area B211 in second inside the second bending section B2, and clear in second
Wash the second active material layer 22 at district B211 by partly or completely clear all.Owing to the second bending section B2 of the second pole piece 2 has
Second cleaning area B21, the second cleaning area B21 include being formed at cleaning area B211 in second inside the second bending section B2, and
In two, the second active material layer 22 at the B211 of cleaning area is by partly or completely clear all, thus decreases the second active material layer 22
When the second pole piece 2 winds to the constraint of lateral bend in the second collector 21, and then solve takeup type battery core in winding and heat
The breakage problem of the second pole piece 2 during pressure.Especially when the second collector 21 uses ultra-thin foil and has bigger compacting
During density, based on arranging the second cleaning area B21 on the second bending section B2 of the second pole piece 2, substantially increase takeup type battery core
Energy density.
In one embodiment, also can have with reference to Fig. 1 and Fig. 3, the second bending section B2: non-cleaning area B22 in second, be positioned at
The inner side of the second bending section B2 and part between the B211 of cleaning area in being in the second planar portions P2 and second, and the most clear in second
Wash the first active material layer 12 at district B22 not to be eliminated.
In one embodiment, the second bending section B2 in from inside to outside 1～10 circles of the second pole piece 2 can be provided with second
Cleaning area B21.Further, it is clear that the second bending section B2 during from inside to outside 1～the 6 of the second pole piece 2 are enclosed can be provided with second
Wash district B21.
In one embodiment, seeing figures.1.and.2, the second cleaning area B21 may also include the second outer cleaning area B212, is formed
In the outside of the second bending section B2, the second active material layer 22 at the second outer cleaning area B212 is by partly or completely clear all.
In one embodiment, also can have with reference to Fig. 1, the second bending section B2: the second outer non-cleaning area B23, be positioned at second
The outside of bending section B2 and be in the part between the second planar portions P2 and the second outer cleaning area B212, and the second outer non-cleaning area
The first active material layer 12 at B23 is not eliminated.
In one embodiment, the width from the inner ring multiple second cleaning area B21 in outer ring of the second pole piece 2 can be identical
Or it is different.Preferably, with reference to Fig. 2 and Fig. 5, the width from the inner ring multiple second cleaning area B21 in outer ring of the second pole piece 2
Can successively decrease successively.
Specifically, the second pole piece 2 from inner ring in outer ring multiple second in the width of cleaning area B211 can be successively
Successively decrease.This be due to the second pole piece 2 bending time, the second pole piece 2 from inner ring in outer ring multiple second in cleaning area
The radius of curvature of B211 becomes larger, and from inner ring in outer ring multiple second in the produced internal stress of cleaning area B211
Be gradually reduced, therefore the second pole piece 2 from inner ring in outer ring multiple second in the width of cleaning area B211 can suitably depend on
Secondary successively decrease.
The width from the inner ring multiple second outer cleaning area B212 in outer ring of the second pole piece 2 can successively decrease successively.This is
Owing to the second pole piece 2 is when bending, the curvature from the inner ring multiple second outer cleaning area B212 in outer ring of the second pole piece 2 half
Footpath becomes larger, and is gradually reduced from the produced internal stress of the inner ring multiple second outer cleaning area B212 in outer ring, because of
The width from the inner ring multiple second outer cleaning area B212 in outer ring of this second pole piece 2 can successively decrease the most successively.
In one embodiment, the degree of depth from the inner ring multiple second cleaning area B21 in outer ring of the second pole piece 2 can be identical
Or it is different.Preferably, the degree of depth from the inner ring multiple second cleaning area B21 in outer ring of the second pole piece 2 is successively decreased successively.At this
In remark additionally, the thickness of active material layer used based on the second active material layer 22 is different with compacted density, second
Width from the inner ring multiple second cleaning area B21 in outer ring and the degree of depth of pole piece 2 can correspondingly adjust.
Here remark additionally, for arrange on the same second bending section B2 of the second pole piece 2 second in clear
Wash district B211 and the second outer cleaning area B212, due in second the radius of curvature of cleaning area B211 less than the second outer cleaning area B212
Radius of curvature, thus when the second pole piece 2 this second bending section B2 bending time, in second produced by the B211 of cleaning area
Internal stress is relatively big, and therefore when design, the width of cleaning area B211 can be suitably larger than the width of the second outer cleaning area B212 in second
Degree.
In one embodiment, with reference to Fig. 1, Fig. 2, Fig. 4 and Fig. 5, the second pole piece 2 upon deployment, cleaning area in multiple second
B211 is spaced, and multiple second outer cleaning area B212 are spaced.
In one embodiment, the first active material layer 12 at the first cleaning area B11 of the first bending section B1 passes through laser
Cleaning technique is by partly or completely clear all.
In one embodiment, the second active material layer 22 at the second cleaning area B21 of the second bending section B2 passes through laser
Cleaning technique is by partly or completely clear all.
In one embodiment, with reference to Fig. 7, the first cleaning area B11 (cleaning area B111 and/or the first outer cleaning area in first
B112) shape can be rectangle, and the width of a length of first pole piece 1 of the first cleaning area B11.
In one embodiment, with reference to Fig. 8, in first, cleaning area B111 and the first outer cleaning area B112 can be formed with multiple points
The pit dissipated.
In one embodiment, the shape of the second cleaning area B21 (cleaning area B211 and/or the second outer cleaning area B212 in second)
Shape can be rectangle, and the width of a length of second pole piece 2 of the second cleaning area B21.
In one embodiment, cleaning area B211 and the second outer cleaning area B212 is formed with multiple scattered pit in second.
In one embodiment, referring to figs. 1 through Fig. 8, takeup type battery core may also include that the first lug 4, is electrically connected to first flat
The first collector 11 at face P1；And second lug 5, it is electrically connected to the second collector 21 at the second planar portions P2.
In one embodiment, with reference to Fig. 1 and Fig. 4, the at the first planar portions P1 in the often circle that the first pole piece 1 is wound into
One collector 11 correspondence is electrically connected to first lug 4, at the second planar portions P2 in the often circle that the second pole piece 2 is wound into
Second collector 21 correspondence is electrically connected to second lug 5.
In one embodiment, all of first lug 4 and the second lug 5 are respectively positioned on thickness direction same of takeup type battery core
Side.
The first collection in one embodiment, in all circles that the first pole piece 1 is wound into, at only one the first planar portions P1
Fluid 11 correspondence is electrically connected to first lug 4.In all circles that the second pole piece 2 is wound into, only one the second planar portions
The second collector 21 correspondence at P2 is electrically connected to second lug 5.
In one embodiment, with reference to Fig. 8, the first lug 4 can be formed by the first direct cross cutting of collector 11, the second lug 5
Can be formed by the second direct cross cutting of collector 21.
In one embodiment, with reference to Fig. 1, Fig. 3, Fig. 4, Fig. 6 and Fig. 7, the first pole piece 1 is formed with the first lug and houses recessed
Groove 13, houses the first lug 4.With reference to Fig. 1, Fig. 2, Fig. 4 and Fig. 5, the second pole piece 2 is formed with the second lug accommodating grooves 23, receives
Hold the second lug 5.Wherein, all sides of the second lug accommodating grooves 33 can be that three bandings close openings at one side (with reference to Fig. 8), or the
All sides of two lug accommodating grooves 33 can be closing both sides, both sides opening (i.e. through slot).Second lug accommodating grooves 23 also can be such as
This.
In one embodiment, the first lug 4 is welded on the first collector 11, and the second lug 5 is welded in the second collector
On 21.
According in takeup type battery core of the present utility model, the thickness of the first collector 11 is less than 13 μm, the first active matter
The density of matter layer 12 is more than 3.3g/cm3。
According in takeup type battery core of the present utility model, the second active substance in the second active material layer 22 is selected from
One or more in Delanium, native graphite, amorphous carbon, hard charcoal.
According in takeup type battery core of the present utility model, the first active substance in the first pole active material layer is selected from
One or more in cobalt acid lithium, LiMn2O4, ternary material, LiFePO 4.
According in takeup type battery core of the present utility model, the material of isolating membrane 3 can be polypropylene or polyethylene.
According in takeup type battery core of the present utility model, the first pole piece 1 can be anode pole piece, and the second pole piece 2 is negative
Pole pole piece, for plus plate current-collecting body, the second collector 21 is that negative current collector is (if the first collector 11 is aluminum to the first collector 11
Paper tinsel, the second collector 21 is Copper Foil), for positive electrode active material layer, the second active material layer 22 is negative to the first active material layer 12
Pole active material layer.Or, the first pole piece 1 can be cathode pole piece, and the second pole piece 2 is anode pole piece, and the first collector 11 is
Negative current collector and the second collector 21 is negative current collector, the first active material layer 12 second is lived for negative electrode active material layer
Property material layer 22 is positive electrode active material layer.
Claims (10)
1. a takeup type battery core, by the first pole piece (1), the second pole piece (2) and be arranged at the first pole piece (1) and the second pole piece
(2) isolating membrane (3) winding between forms, and described first pole piece (1) includes the first collector (11) and is coated in the first afflux
The first active material layer (12) on the surface of body (11), and the first pole piece (1) to be formed with first in the often circle being wound into flat
Face (P1) and the first bending section (B1), it is characterised in that
First bending section (B1) has: the first cleaning area (B11), from the flexural center of the first bending section (B1) to both sides extension
Becoming, the first cleaning area (B11) includes being formed at cleaning area (B111) in first inside the first bending section (B1), and clear in first
Wash first active material layer (12) at district (B111) place by partly or completely clear all.
Takeup type battery core the most according to claim 1, it is characterised in that the first bending section (B1) also has: in first not
Cleaning area (B12), is positioned at the inner side of the first bending section (B1) and is in the first planar portions (P1) and the first cleaning area (B111)
Between part, and in first, first active material layer (12) at non-cleaning area (B12) place is not eliminated.
Takeup type battery core the most according to claim 1, it is characterised in that
First cleaning area (B11) also includes the first outer cleaning area (B112), is formed at the outside of the first bending section (B1), and first
First active material layer (12) at outer cleaning area (B112) place is by partly or completely clear all.
Takeup type battery core the most according to claim 3, it is characterised in that
First bending section (B1) also has: the first outer non-cleaning area (B13), is positioned at the outside of the first bending section (B1) and is in the
Part between one planar portions (P1) and the first outer cleaning area (B112), and first activity at the first outer non-cleaning area (B13) place
Material layer (12) is not eliminated.
5. according to the takeup type battery core according to any one of claim 1-4, it is characterised in that
The width from the inner ring multiple first cleaning areas (B11) in outer ring of the first pole piece (1) successively decreases successively；And/or
The degree of depth from the inner ring multiple first cleaning areas (B11) in outer ring of the first pole piece (1) is successively decreased successively.
Takeup type battery core the most according to claim 1, it is characterised in that the second pole piece (2) including:
Second collector (21)；And
Second active material layer (22), is coated on the surface of the second collector (21)；
Second pole piece (2) is formed with the second planar portions (P2) and the second bending section (B2), the second bending in the often circle being wound into
(B2) has in portion: the second cleaning area (B21), extends to both sides from the flexural center of the second bending section (B2) and forms, and second cleans
District (B21) includes being formed at cleaning area (B211) in second inside the second bending section (B2), and cleaning area (B211) in second
Second active material layer (22) at place is by partly or completely clear all.
Takeup type battery core the most according to claim 6, it is characterised in that the second bending section (B2) also has: in second not
Cleaning area (B22), is positioned at the inner side of the second bending section (B2) and is in the second planar portions (P2) and the second cleaning area (B211)
Between part, and in second, first active material layer (12) at non-cleaning area (B22) place is not eliminated.
Takeup type battery core the most according to claim 7, it is characterised in that
Second cleaning area (B21) also includes the second outer cleaning area (B212), is formed at the outside of the second bending section (B2), outside second
Second active material layer (22) at cleaning area (B212) place is by partly or completely clear all.
Takeup type battery core the most according to claim 8, it is characterised in that the second bending section (B2) also has: outside second not
Cleaning area (B23), is positioned at the outside of the second bending section (B2) and is in the second planar portions (P2) and the second outer cleaning area (B212)
Between part, and first active material layer (12) at the second outer non-cleaning area (B23) place is not eliminated.
10. according to the takeup type battery core according to any one of claim 6-9, it is characterised in that
The width from the inner ring multiple second cleaning areas (B21) in outer ring of the second pole piece (2) successively decreases successively；And/or
The degree of depth from the inner ring multiple second cleaning areas (B21) in outer ring of the second pole piece (2) is successively decreased successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620639627.6U CN205828572U (en) | 2016-06-24 | 2016-06-24 | Takeup type battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620639627.6U CN205828572U (en) | 2016-06-24 | 2016-06-24 | Takeup type battery core |
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| Publication Number | Publication Date |
|---|---|
| CN205828572U true CN205828572U (en) | 2016-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620639627.6U Withdrawn - After Issue CN205828572U (en) | 2016-06-24 | 2016-06-24 | Takeup type battery core |
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| Country | Link |
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| CN (1) | CN205828572U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546420A (en) * | 2016-06-24 | 2018-01-05 | 宁德时代新能源科技股份有限公司 | winding type battery cell |
| CN107768735A (en) * | 2017-11-09 | 2018-03-06 | 苏州宇量电池有限公司 | A kind of coiled electrode assemblies and lithium ion battery applied to lithium ion battery |
| CN111540881A (en) * | 2020-05-08 | 2020-08-14 | 珠海冠宇电池股份有限公司 | Negative plate, preparation method and lithium ion battery comprising negative plate |
| WO2022165690A1 (en) * | 2021-02-04 | 2022-08-11 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and system therefor, and battery cell and battery |
-
2016
- 2016-06-24 CN CN201620639627.6U patent/CN205828572U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546420A (en) * | 2016-06-24 | 2018-01-05 | 宁德时代新能源科技股份有限公司 | winding type battery cell |
| CN107546420B (en) * | 2016-06-24 | 2024-04-12 | 宁德时代新能源科技股份有限公司 | Winding type battery cell |
| CN107768735A (en) * | 2017-11-09 | 2018-03-06 | 苏州宇量电池有限公司 | A kind of coiled electrode assemblies and lithium ion battery applied to lithium ion battery |
| CN111540881A (en) * | 2020-05-08 | 2020-08-14 | 珠海冠宇电池股份有限公司 | Negative plate, preparation method and lithium ion battery comprising negative plate |
| US11522168B2 (en) | 2020-05-08 | 2022-12-06 | Zhuhai Cosmx Battery Co., Ltd. | Negative electrode sheet, preparation method thereof and lithium ion battery containing the same |
| WO2022165690A1 (en) * | 2021-02-04 | 2022-08-11 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and system therefor, and battery cell and battery |
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