CN107302109A - Takeup type battery core - Google Patents
Takeup type battery core Download PDFInfo
- Publication number
- CN107302109A CN107302109A CN201610236059.XA CN201610236059A CN107302109A CN 107302109 A CN107302109 A CN 107302109A CN 201610236059 A CN201610236059 A CN 201610236059A CN 107302109 A CN107302109 A CN 107302109A
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- China
- Prior art keywords
- collector
- battery core
- pole piece
- type battery
- takeup type
- Prior art date
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Classifications
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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
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- 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
- H01M50/531—Electrode connections inside a battery casing
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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 invention provides a kind of takeup type battery core, including：First pole piece, with the first collector and the first active material layer for being coated in the first collector；Second pole piece, with the second collector and the second active material layer for being coated in the second collector；Barrier film, the first pole piece and the second pole piece are kept apart；First lug, is electrically connected with the first collector；Second lug, is electrically connected with the second collector.The first volume of first pole piece includes around the initial segment：Main part, in volume Two around the outside of the initial segment through-thickness, and the length of main part along its length is more than length of the volume Two around the initial segment along its length；Revers turn part, is connected and is in the inner side of main part through-thickness with main part.In the longitudinal direction, the 3rd winding the initial segment of barrier film is located at volume Two around the outside of the end of the initial segment, and extends and not inflection around the direction of the end of the initial segment along away from volume Two.
Description
Technical field
The present invention relates to field of batteries, more particularly to a kind of takeup type battery core.
Background technology
With the commercialized development of lithium-ion electric core, requirement more and more higher of the market to its energy density.Ginseng
According to Fig. 1, the blank plus plate current-collecting body 111 (Al foil, aluminium foil) on the head of conventional takeup type battery core is short
In negative current collector 211 (Cu foil, copper foil), and the inside of takeup type battery core needs two layers of blank coil
Barrier film 3 (the part barrier film that Fig. 1 dashed boxes are surrounded is the barrier film of blank coil), not only causes isolation
The waste of film 3, and cause barrier film 3 with positive pole ear 4, negative lug 5 in the thickness directiont
It is overlapping, therefore increase the thickness of battery core to reduce the energy density of battery core.
The content of the invention
In view of problem present in background technology, it is an object of the invention to provide a kind of takeup type battery core,
It can reduce the usage amount of barrier film and gummed paper, and reduce the thickness of takeup type battery core, improve takeup type
The energy density of battery core.
To achieve these goals, the invention provides a kind of takeup type battery core, it includes：First pole piece,
With the first collector and the first active material layer being coated at least one surface of the first collector；The
Two pole pieces, with the second collector and the second active matter being coated at least one surface of the second collector
Matter layer；Barrier film, is arranged between the first pole piece and the second pole piece, by the first pole piece and the second pole piece
Keep apart；First lug, is electrically connected with the first collector；Second lug, is electrically connected with the second collector.
Wherein, the first volume of the first pole piece includes around the initial segment：Main part, in the second pole piece
Volume Two is around the outside of the initial segment through-thickness, and the length of main part along its length is more than the
The length of two winding the initial segments along its length；And revers turn part, it is connected with main part and is in master
The inner side of body portion through-thickness.In the longitudinal direction, the 3rd winding the initial segment of barrier film is located at
The volume Two of second pole piece around the outside of the end of the initial segment, and along away from volume Two around the initial segment
The direction extension of end and not inflection.
Beneficial effects of the present invention are as follows：
In the takeup type battery core according to the present invention, because the 3rd winding the initial segment of barrier film is along away from the
The direction extension and not inflection of the end of two winding the initial segments, without the long length as prior art
Backrush, so as to reduce the usage amount of barrier film, reduces cost.In addition, the 3rd winding starting of barrier film
The extension mode of section can avoid the 3rd winding the initial segment in a thickness direction with volume Two around the initial segment weight
It is folded, so as to reduce the thickness of takeup type battery core, improve the energy density of takeup type battery core.Meanwhile, this hair
Bright takeup type battery core can realize automated production.In addition, the end of revers turn part is in a thickness direction only
Side is relative with the second pole piece, therefore only need to paste gummed paper, and opposite side and main part phase in the side
It is right, therefore gummed paper need not be pasted, compared with prior art, the consumption of gummed paper is reduced, cost has been saved,
And further reduce battery core thickness.
Brief description of the drawings
Fig. 1 is the schematic diagram of the takeup type battery core of prior art；
Fig. 2 be according to the present invention takeup type battery core first embodiment schematic diagram, wherein the first volume around
The initial segment, volume Two are indicated around the initial segment, the 3rd winding the initial segment with dashed box；
Fig. 3 be according to the present invention takeup type battery core second embodiment schematic diagram, wherein the first volume around
The initial segment, volume Two are indicated around the initial segment, the 3rd winding the initial segment with dashed box；
Fig. 4 be according to the present invention takeup type battery core 3rd embodiment schematic diagram, wherein the first volume around
The initial segment, volume Two are indicated around the initial segment, the 3rd winding the initial segment with dashed box；
Fig. 5 be according to the present invention takeup type battery core fourth embodiment schematic diagram, wherein the first volume around
The initial segment, volume Two are indicated around the initial segment, the 3rd winding the initial segment with dashed box；
Fig. 6 be according to the present invention takeup type battery core the 5th embodiment schematic diagram, wherein the first volume around
The initial segment, volume Two are indicated around the initial segment, the 3rd winding the initial segment with dashed box；
Fig. 7 is the shaping schematic diagram of the takeup type battery core according to the present invention；
Fig. 8 is the schematic diagram of an embodiment of the lug of formation first of the takeup type battery core according to the present invention,
Wherein for the sake of clarity, it is not directed to the first active material layer on the first collector；
Fig. 9 is the signal of another embodiment of the lug of formation first of the takeup type battery core according to the present invention
Figure, wherein for the sake of clarity, the first active material layer is not directed on the first collector；
Figure 10 is the schematic diagram of an embodiment of the lug of formation second of the takeup type battery core according to the present invention,
Wherein for the sake of clarity, it is not directed to the second active material layer on the second collector；
Figure 11 is the signal of another embodiment of the lug of formation second of the takeup type battery core according to the present invention
Figure, wherein for the sake of clarity, the first active material layer is not directed on the second collector.
Wherein, description of reference numerals is as follows：
The lug of 1 first pole piece 5 second
The 11 first collector E1 first volumes are around the initial segment
111 blank the first collector E11 main parts
12 first active material layer E12 revers turn parts
13 first groove E2 volume Twos are around the initial segment
2 second pole piece E3 the 3rd wind the initial segment
21 second collector S1 first volume pins
211 blank the second collector S2 volume Two pins
22 second active material layer G clip slots
23 second groove T thickness directions
3 barrier film L length directions
4 first lugs
Embodiment
With reference to the accompanying drawings come describe in detail the present invention takeup type battery core.
Reference picture 2 includes to Figure 11 according to the takeup type battery core of the present invention：First pole piece 1, with
One collector 11 and the first active material layer 12 being coated on first at least one surface of collector 11；
Second pole piece 2, with the second collector 21 and is coated on second at least one surface of collector 21
Second active material layer 22；Barrier film 3, is arranged between the first pole piece 1 and the second pole piece 2, will
First pole piece 1 and the second pole piece 2 are kept apart；First lug 4, is electrically connected with the first collector 11；The
Two lugs 5, are electrically connected with the second collector 21.
Wherein, the first volume of the first pole piece 1 includes around the initial segment E1：Main part E11, in
The volume Two of two pole pieces 2 is around the initial segment E2 through-thickness T outside, and main part E11 is along length
The length for spending direction L is more than length of the volume Two around the initial segment E2 L along its length；And inflection
Portion E12, is connected and is in main part E11 through-thickness T inner side with main part E11.
On length direction L, the 3rd winding the initial segment E3 of barrier film 3 is located at the volume Two of the second pole piece 2
Outside around the initial segment E2 end, and along away from volume Two around the initial segment E2 end direction
Extension and not inflection.
In the takeup type battery core according to the present invention, due to the 3rd winding the initial segment E3 edges of barrier film 3
Direction extension and not inflection away from volume Two around the initial segment E2 end, without as prior art
Such long length backrush, so as to reduce the usage amount of barrier film 3, reduces cost.In addition, barrier film 3
The 3rd winding the initial segment E3 extension mode can avoid the 3rd winding the initial segment E3 in thickness direction T
It is upper overlapping around the initial segment E2 with volume Two, so as to reduce the thickness of takeup type battery core, improve takeup type electricity
The energy density of core.Meanwhile, takeup type battery core of the invention can realize automated production.In addition, returning
Only side is relative with the second pole piece 2 in the thickness directiont for folding part E12 end, therefore only need to be in the side
Gummed paper is pasted (because in actual production, revers turn part E12 end can leave burr, easily puncture isolation
Film 3 and contacted with the second pole piece 2, and cause short circuit), and opposite side is relative with main part E11,
Therefore gummed paper need not be pasted, compared with prior art, reduces the consumption of gummed paper, saved cost, and
And further reduce battery core thickness.
In an embodiment of the takeup type battery core according to the present invention, through-thickness T, in the second pole piece
2 volume Two is respectively equipped with one layer of barrier film 3 around the adjacent inner side and outer side of the initial segment E2, and described
Two layers of barrier film 3 exceeds volume Two around the initial segment E2 end, beyond volume Two around the initial segment E2's
Two layers of barrier film 3 of end constitutes the 3rd winding the initial segment E3 of barrier film 3.In the winding of formation
In formula battery core, the 3rd winding the initial segment E3 is two layers of barrier film, it is preferable that this two layers of barrier film laminating
Together.
In an embodiment of the takeup type battery core according to the present invention, the 3rd winding the initial segment of barrier film 3
E3 length is relevant with the length of takeup type battery core, and minimum length is less than or equal to 3mm, is preferably
3mm~100mm, most preferably 8mm~30mm.
In an embodiment of the takeup type battery core according to the present invention, the first pole piece 1 can be anode pole piece
Or cathode pole piece, accordingly, the second pole piece 2 are cathode pole piece or anode pole piece.Preferably,
One pole piece 1 is anode pole piece, and the second pole piece 2 is cathode pole piece, accordingly, the first active material layer 12
For positive electrode active material layer, it is specifically as follows at least one of cobalt acid lithium, LiFePO4, LiMn2O4.
Second active material layer 22 is negative electrode active material layer, is specifically as follows at least one of carbon and silicon.
In an embodiment of the takeup type battery core according to the present invention, the first lug 4 is one or more.
Reference picture 5 and Fig. 6, when the first lug 4 of takeup type battery core is multiple, multiple first lugs 4 are excellent
Through-thickness T is selected to align, still, due to mismachining tolerance, the aligned position of each first lug 4 is also permitted
Perhaps certain deviation.
In an embodiment of the takeup type battery core according to the present invention, the second lug 5 is one or more.
Reference picture 6, when the second lug 5 of takeup type battery core is multiple, multiple second lugs 5 are preferably along thickness
Direction T alignment is spent, still, due to mismachining tolerance, the aligned position of each second lug 5 also allows necessarily
Deviation.
In an embodiment of the takeup type battery core according to the present invention, the first collector 11 is aluminium foil, the
Two collectors 21 are copper foil.
In an embodiment of the takeup type battery core according to the present invention, the volume Two of the second pole piece 2 is around starting
Section E2 has the second collector of blank 211 of uncoated second active material layer 22.
In an embodiment of the takeup type battery core according to the present invention, the first collector 11 with blank the
Direct relative uncoated first active material layer 12 in side of two collectors 211.Due to the afflux of blank second
Uncoated second active material layer 22 on body 211, with the second collector of blank 211 directly relative first
The first active material layer 12 is covered with if applied on collector 11, not only capacity is not helped (in blank
Second collector 211 and between the second collector of blank 211 directly relative the first collector 11,
Lithium ion can not realize round insertion and deintercalation), increase battery core thickness on the contrary close so as to reduce battery core energy
Degree, so the first work with the direct relative side of the second collector of blank 211 of the first collector 11
Property material layer 12 can be saved, it is to avoid the waste of material, and improve battery core energy density.
In an embodiment of the takeup type battery core according to the present invention, revers turn part E12 has uncoated first
The first collector of blank 111 of active material layer 12.
In an embodiment of the takeup type battery core according to the present invention, main part E11 has uncoated first
The first collector of blank 111 of active material layer 12.
In an embodiment of the takeup type battery core according to the present invention, the second collector 21 with blank the
Direct relative uncoated second active material layer 22 in side of one collector 111.Due to the afflux of blank first
Uncoated first active material layer 12 on body 111, with the first collector of blank 111 directly relative second
The second active material layer 22 is covered with if applied on collector 21, not only capacity is not helped (in blank
First collector 111 and between the first collector of blank 111 directly relative the second collector 21,
Lithium ion can not realize round insertion and deintercalation), increase battery core thickness on the contrary close so as to reduce battery core energy
Degree, so the second work with the direct relative side of the first collector of blank 111 of the second collector 21
Property material layer 22 can be saved, it is to avoid the waste of material, and improve battery core energy density.
In an embodiment of the takeup type battery core according to the present invention, the first pole piece 1 also has the first groove
13, bottom is the first collector of blank 111 exposed and the week side of boss is the first active material layer 12, the first pole
Ear 4 is placed in the first groove 13 to be electrically connected with the first collector of blank 111；Second pole piece 2 also has
Second groove 23, bottom is the second collector of blank 211 exposed and the week side of boss is the second active material layer
22, the second lug 5 is placed in the second groove 23 to be electrically connected with the second collector of blank 211.
In an embodiment of the takeup type battery core according to the present invention, the first lug 4 and the first collector 11
It is integrally formed.For example, referring to Fig. 8, the first lug 4 is directly cut by the first collector 11 to be formed.Enter
One step preferably, as shown in figure 9, the first lug 4 directly cut by the first collector 11 and bend and
Into.When the first lug 4 is multiple, it is preferable that the first lug 4 and the bodily form of the first collector 11 1
Into.
In an embodiment of the takeup type battery core according to the present invention, the second lug 5 and the second collector 21
It is integrally formed.For example, referring to Figure 10, the second lug 5 is directly cut by the second collector 21 to be formed.
It is further preferred that as shown in figure 11, the second lug 5 is directly cut and bent by the second collector 21
Form.When the second lug 5 is multiple, it is preferable that the second lug 5 and the one of the second collector 21
Formed.
In an embodiment of the takeup type battery core according to the present invention, the first lug 4 is independently formed and fixed
In corresponding the first collector of blank 111.It is fixed on back for example, referring to 3 to Fig. 6, first lugs 4
The first collector of blank 111 at the E12 of folding part；Or, reference picture 5 and Fig. 6, the first lug 4 are consolidated
The first collector of blank 111 at the first groove 13；Or, reference picture 2, the first lug 4 is consolidated
Due to main part E11 the first collector of blank 111.
In an embodiment of the takeup type battery core according to the present invention, reference picture 2, the first lug 4 is independent
It is formed and secured to main part E11 the first collector of blank 111, preferably revers turn part E12 is not with first
Lug 4 is overlapping in the thickness directiont.
In an embodiment of the takeup type battery core according to the present invention, the second lug 5 is independently formed and fixed
In the second collector of blank 211；Accordingly, revers turn part E12 not with the second lug 5 in thickness direction T
It is upper overlapping.The second collector of blank 211 is fixed on for example, referring to 2 to Fig. 6, second lugs 5；Or
Person, reference picture 6, the first collector of blank 111 that the second lug 5 is fixed at the second groove 23.
In an embodiment of the takeup type battery core according to the present invention, the first lug 4 can be solid by welding
It is described to be welded as Laser Welding, ultrasonic bonding or electric resistance welding due to corresponding the first collector of blank 111.
Second lug 5 can be described to be welded as swashing by being fixedly welded on corresponding the second collector of blank 211
Flush weld, ultrasonic bonding or electric resistance welding.
In an embodiment of the takeup type battery core according to the present invention, revers turn part E12 end is in thickness side
On to T gummed paper (not shown) is posted with the direct relative side of the second pole piece 2；Or second pole piece 2
Gummed paper (not shown) is posted with the revers turn part E12 direct relative side in end.Gummed paper being capable of anti-non-return
The burr of folding part E12 end punctures barrier film 3 and is contacted with the second pole piece 2 and cause short circuit.
In the takeup type battery core according to the present invention, reference picture 7, the takeup type battery core is by length side
First volume pin S1 and volume Two pin the S2 winding being sequentially placed on to L are formed.Volume three of barrier film 3
It is clamped in around the initial segment E3 part in the clip slot G between first volume pin S1 and volume Two pin S2, when
During first volume pin S1 and volume Two pin S2 rotations, barrier film 3 and the first pole piece separated by barrier film 3
1 and second pole piece 2 on first volume pin S1 and volume Two pin S2, it is to be spooled after the completion of, extract out
First volume pin S1 and volume Two pin S2, that is, complete the shaping of takeup type battery core.
Claims (16)
1. a kind of takeup type battery core, including：
First pole piece (1), with the first collector (11) and is coated in the first collector (11) extremely
The first active material layer (12) on a few surface；
Second pole piece (2), with the second collector (21) and is coated in the second collector (21) extremely
The second active material layer (22) on a few surface；
Barrier film (3), is arranged between the first pole piece (1) and the second pole piece (2), by first
Pole piece (1) and the second pole piece (2) are kept apart；
First lug (4), is electrically connected with the first collector (11)；
Second lug (5), is electrically connected with the second collector (21)；
Characterized in that,
The first volume of first pole piece (1) includes around the initial segment (E1)：
Main part (E11), the volume Two in the second pole piece (2) is around the initial segment (E2) along thickness
Spend the outside of direction (T), and the length of main part (E11) (L) along its length is more than the
The length of two winding the initial segments (E2) (L) along its length；And
Revers turn part (E12), is connected with main part (E11) and is in main part (E11) along thickness
Spend the inner side of direction (T)；
On length direction (L), the 3rd winding the initial segment (E3) of barrier film (3) is located at the second pole
The volume Two of piece (2) around the outside of the end of the initial segment (E2), and along away from volume Two around the initial segment
(E2) the direction extension of end and not inflection.
2. takeup type battery core according to claim 1, it is characterised in that through-thickness (T),
Around the adjacent inner side and outer side of the initial segment (E2) one layer is respectively equipped with the volume Two of the second pole piece (2)
Barrier film (3), and the both sides barrier film (3) exceeds volume Two around the initial segment (E2) end
Portion, two layers of barrier film (3) beyond volume Two around the end of the initial segment (E2) constitutes barrier film
(3) the 3rd winding the initial segment (E3).
3. takeup type battery core according to claim 1, it is characterised in that the 3rd of barrier film (3)
The length for winding the initial segment (E3) is 3mm~100mm, preferably 8mm~30mm.
4. takeup type battery core according to claim 1, it is characterised in that the first pole piece (1) is just
Pole pole piece, the second pole piece (2) is cathode pole piece.
5. takeup type battery core according to claim 1, it is characterised in that
First lug (4) is one or more；
Second lug (5) is one or more.
6. takeup type battery core according to claim 1, it is characterised in that the of the second pole piece (2)
Two winding the initial segments (E2) have the collector of blank second of uncoated second active material layer (22)
(211)。
7. takeup type battery core according to claim 6, it is characterised in that the first collector (11)
With the collector of blank second (211) directly relative uncoated first active material layer (12) in side.
8. takeup type battery core according to claim 1, it is characterised in that revers turn part (E12) has
The collector of blank first (111) of uncoated first active material layer (12).
9. takeup type battery core according to claim 1, it is characterised in that main part (E11) has
The collector of blank first (111) of uncoated first active material layer (12).
10. takeup type battery core according to claim 8 or claim 9, it is characterised in that the second collector (21)
With the collector of blank first (111) directly relative uncoated second active material layer (22) in side.
11. takeup type battery core according to claim 1, it is characterised in that
First pole piece (1) also has the first groove (13), and bottom is the collector of blank first exposed
(111) and the week side of boss is the first active material layer (12), the first lug (4) is placed in the first groove (13)
In electrically connected with the collector of blank first (111)；
Second pole piece (2) also has the second groove (23), and bottom is the collector of blank second exposed
(211) and the week side of boss is the second active material layer (22), the second lug (5) is placed in the second groove (23)
In electrically connected with the collector of blank second (211).
12. takeup type battery core according to claim 1, it is characterised in that
First lug (4) is integrally formed with the first collector (11)；
Second lug (5) is integrally formed with the second collector (21).
13. takeup type battery core according to claim 8 or claim 9, it is characterised in that the first lug (4)
Independently form and be fixed on the corresponding collector of blank first (111).
14. takeup type battery core according to claim 9, it is characterised in that the first lug (4) is single
Solely it is formed and secured to the collector of blank first (111) of main part (E11), preferably revers turn part (E12)
Not with the first lug (4) on thickness direction (T) it is overlapping.
15. takeup type battery core according to claim 6, it is characterised in that
Second lug (5) independently forms and is fixed on the collector of blank second (211)；
Revers turn part (E12) not with the second lug (5) on thickness direction (T) it is overlapping.
16. takeup type battery core according to claim 8, it is characterised in that
The end of revers turn part (E12) is directly relative with the second pole piece (2) on thickness direction (T)
Post gummed paper in side；Or
Second pole piece (2) with the end of revers turn part (E12) directly relative side posts gummed paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236059.XA CN107302109B (en) | 2016-04-15 | 2016-04-15 | Winding type battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236059.XA CN107302109B (en) | 2016-04-15 | 2016-04-15 | Winding type battery cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107302109A true CN107302109A (en) | 2017-10-27 |
| CN107302109B CN107302109B (en) | 2023-08-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610236059.XA Active CN107302109B (en) | 2016-04-15 | 2016-04-15 | Winding type battery cell |
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|---|---|
| CN (1) | CN107302109B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193163A (en) * | 2021-04-28 | 2021-07-30 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN114447342A (en) * | 2022-04-08 | 2022-05-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| EP4106048A4 (en) * | 2021-04-28 | 2023-06-14 | Ningde Amperex Technology Ltd. | Cell and power utilization apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113193163A (en) * | 2021-04-28 | 2021-07-30 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN113193163B (en) * | 2021-04-28 | 2022-08-12 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| WO2022227729A1 (en) * | 2021-04-28 | 2022-11-03 | 宁德新能源科技有限公司 | Cell and power utilization apparatus |
| EP4106048A4 (en) * | 2021-04-28 | 2023-06-14 | Ningde Amperex Technology Ltd. | Cell and power utilization apparatus |
| CN114447342A (en) * | 2022-04-08 | 2022-05-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114447342B (en) * | 2022-04-08 | 2022-07-26 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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