CN206401457U - A kind of takeup type battery core - Google Patents
A kind of takeup type battery core Download PDFInfo
- Publication number
- CN206401457U CN206401457U CN201621440669.3U CN201621440669U CN206401457U CN 206401457 U CN206401457 U CN 206401457U CN 201621440669 U CN201621440669 U CN 201621440669U CN 206401457 U CN206401457 U CN 206401457U
- Authority
- CN
- China
- Prior art keywords
- battery core
- pole piece
- lug
- barrier film
- takeup type
- 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.)
- Active
Links
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
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application is related to secondary cell field, specifically, is related to a kind of takeup type battery core.The takeup type battery core of the application includes the flat battery core by the first barrier film, the first pole piece, the second barrier film and the second pole piece coiling, second pole piece is at least that part relative away from the face at battery core center with the second Kong Bo areas on the second Kong Bo areas, the first pole piece includes the first Kong Bo areas in the part of the outmost turns positioned at takeup type battery core.The outmost turns of the takeup type battery core of the application set bilayer Kong Bo areas, so as to which the opposite sides of the thickness direction in battery core all forms vest area, when battery core is by abusing, short circuit can preferentially occur for vest area, and avoid burning or the safety problem such as explode, improve the security of battery core.
Description
Technical field
The application is related to secondary cell field, specifically, is related to a kind of takeup type battery core.
Background technology
Current polymer Li-ion battery is constantly pursuing high-energy-density, and thing followed safety problem is equally huge
Challenge, the battery core of many high-energy-densities faces the risk being difficult to by some safety tests, such as acupuncture and hits safety
Test.And the method that conventional improvement acupuncture is hit is the outer vest area by two-sided uncoated anode and cathode collector formation,
And the method is only capable of in the one side formation vest area of battery core, as shown in Figure 1 at present；So that the region that ought not form vest meets with
It is easy to trigger safety problem during by external force collision, while larger energy density loss is will also result in, while causing wave to material
Take.
In consideration of it, special propose the application.
Utility model content
Present invention purpose is to propose a kind of takeup type battery core.
In order to complete the purpose of the application, the technical scheme used for：
The application is related to a kind of takeup type battery core, the takeup type battery core include by the first barrier film, the first pole piece, second every
It is connected with the flat battery core of film and the second pole piece coiling, first pole piece on the first lug, second pole piece
It is connected with the second lug；Second pole piece is at least the second empty paper tinsel in the part of the outmost turns positioned at the takeup type battery core
The part relative away from the face at battery core center with the second Kong Bo areas includes the first Kong Bo areas on area, first pole piece.
It is preferred that, the part relative with the face at the second Kong Bo areas towards the battery core center includes the on first pole piece
One empty set fluid zone.
It is preferred that, the site that first pole piece is bent for the first time is the first bending place, of first pole piece
Top to the distance between first bending place be the first pole piece head；The site that second pole piece is bent for the first time
For the second bending place, the distance between initiating terminal of second pole piece to second bending place is the second pole piece head；
First lug is arranged in the first pole piece head, and/or, second lug is arranged at described second
In pole piece head.
It is preferred that, first lug is arranged in the first Kong Bo areas, and/or, second lug is arranged at institute
State in the second Kong Bo areas.
It is preferred that, the site that first pole piece is bent for the first time is the first bending place, second pole piece first
The secondary site bent is the second bending place；First pole piece includes the first active material layer, first active material
The end of layer is the first active material layer end；Second pole piece includes the second active material layer, second active material
The end of layer is the second active material layer end, first bending place to first between the first active material layer end
Pole piece is provided with the first groove for exposing blank collector, and first lug is fixed in first groove；And/or,
Second bending place is provided with to the second pole piece between the second active material layer end exposes blank collection
Second groove of fluid, second lug is fixed in second groove.
It is preferred that, initiating terminal inflection formation first inflection section, institute inside the flat battery core of first pole piece
The inflection site for stating the first inflection section is the first inflection site；And/or, the initiating terminal of second pole piece is in flat electricity
Core inner inflection forms the second inflection section, and the inflection site of the second inflection section is the second inflection site.
It is preferred that, the initiating terminal of the initiating terminal of first barrier film and second barrier film is inside the flat battery core
Inflection forms barrier film revers turn part.
It is preferred that, on the flat battery core thickness direction, the correspondence of first lug or/and second lug
The battery core of position most continuous overlapping first barrier film in inner side and the second barrier film sum are no more than two layers.
It is preferred that, the initiating terminal of first barrier film is connected with the initiating terminal of second barrier film.
It is preferred that, the takeup type battery core end is provided with one section only by first barrier film and/or second barrier film
The barrier film ending section of composition.
It is preferred that, maximum gauge is less than or equal to first lug after the welding of first lug and the first collector
With 1.5 times of the thickness sum of first collector；And/or, it is maximum after the welding of second lug and the second collector
Thickness is less than or equal to 1.5 times of the thickness sum of second lug and second collector.
The technical scheme of the application at least has following beneficial effect：
The outmost turns of the takeup type battery core of the application set bilayer Kong Bo areas, so that relative two of the thickness direction in battery core
Side all forms vest area, when battery core is by abusing, and short circuit can preferentially occur for vest area, and avoids burning or the safety such as explode
Problem, so as to improve the security of battery core；Meanwhile, the application forms vest in the opposite sides of the thickness direction in battery core
Area, also balances the thickness of battery core both sides crimping portion, so that the flatness of battery core more preferably, can improve battery core deformation.
Brief description of the drawings
Fig. 1 is takeup type core strueture schematic diagram in background technology；
Fig. 2 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 3 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 4 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 5 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 6 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 7 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 8 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Fig. 9 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Figure 10 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
Figure 11 is the takeup type core strueture schematic diagram in a certain embodiment of the application；
1- takeup type battery cores；
The pole pieces of 10- first；
The first Kong Bo of 101- areas；
The inflection of 102- first section；
The bending places of 103- first；
The first empty sets of 104- fluid zone；
The pole pieces of 20- second；
The second Kong Bo of 201- areas；
The inflection of 202- second section；
The bending places of 203- second；
The barrier films of 30- first；
The barrier films of 40- second；
The lugs of 50- first；
The lugs of 60- second；
70- barrier film revers turn parts；
80- barrier films ending section.
Embodiment
With reference to specific embodiment, the application is expanded on further.It should be understood that these embodiments are merely to illustrate the application
Rather than limitation scope of the present application.
The invention relates to a kind of takeup type battery core 1, as shown in Fig. 2 including by the first barrier film 30, the first pole piece
10th, the first lug 50 is connected with the flat battery core of the second barrier film 40 and the second pole piece 20 winding, the first pole piece 10, the
The second lug 60 is connected with two pole pieces 20；The outmost turns of second pole piece 20 are the second Kong Bo areas 201, with the on the first pole piece 10
Two Kong Bo areas 201 include the first Kong Bo areas 101 away from the relative part in the face at battery core center.So as in the thickness direction of battery core
The opposite sides in (T-T ' directions) all forms the part formed relative by empty set fluid, i.e. vest area, when battery core is by abusing,
Short circuit can preferentially occur for vest area, and avoid burning or the safety problem such as explode, so as to improve the security of battery core.
It is further preferred that part bag relative with the face at the second Kong Bo areas 201 towards battery core center on the first pole piece 10
Include the first empty set fluid zone 104.So as to also form vest between the second Kong Bo areas 201 another side relative with the first pole piece 10
Area, further increases the security of battery core.
In the embodiment of the present application, the first lug 50 and/or the second lug 60 can be located at the head of pole piece.As shown in Fig. 2
The site that first pole piece 10 is bent for the first time is the first bending place 103, the initiating terminal of the first pole piece 10 to the first bending place
The distance between 103 be the first pole piece head；The site that second pole piece 20 is bent for the first time is the second bending place 203, the
The initiating terminal of two pole pieces 20 to the distance between the second bending place 203 be the second pole piece head；First lug 50 is arranged at first
In pole piece head, the second lug 60 is arranged in the second pole piece head.
In the embodiment of the present application, the first lug 50 and/or the second lug 60 can be located at the afterbody of pole piece.As shown in figure 3,
First lug is arranged in the first Kong Bo areas 101, and the second lug is arranged in the second Kong Bo areas 201.
In the embodiment of the present application, as shown in figure 4, the first pole piece 10 includes the first active material layer, the first active material
The end of layer is the first active material layer end；Second pole piece 20 includes the second active material layer, the end of the second active material layer
Hold as the second active material layer end, set on the first pole piece 10 between first bending place the 103 to the first active material layer end
There is the first groove (not shown) for exposing blank collector, the first lug 50 is fixed in the first groove.
Or, the second pole piece 20 between second bending place the 203 to the second active material layer end, which is provided with, exposes blank
Second groove of collector, the second lug 60 is fixed in the second groove.
Wherein, groove may be designed to the short groove that three side sealing is closed, one side is open, and may be designed as running through pole piece width
Long recess, i.e. two face closures, two sides opening.
In the embodiment of the present application, in the case of not off-energy density, for the ease of batch production, as shown in figure 5,
The inflection inside battery core of the initiating terminal of second pole piece 20 forms the second inflection section 202, and the inflection site of the second inflection section 202 is the
Two inflection sites, the direction of inflection can be identical or opposite with coiling direction.In addition, as shown in fig. 6, of the first pole piece 10
Top inflection inside battery core forms the first inflection section 102, and the inflection site of the first inflection section 102 is the first inflection site.
In the embodiment of the present application, produce for convenience, and not off-energy density, as shown in fig. 7, the first barrier film 30
The inflection inside flat battery core of the initiating terminal of initiating terminal and the second barrier film 40 forms barrier film revers turn part 70.Barrier film revers turn part 70
Barrier film is fixed on volume pin by design during facilitating electric core winding, consequently facilitating production, can improve production efficiency.
It is further preferred that on flat battery core thickness direction, the correspondence position of the first lug 50 and the second lug 60
Continuous the first overlapping barrier film 30 in battery core most inner side and the sum of the second barrier film 40 be no more than two layers so that it is most interior to reduce battery core
The number of plies of layer barrier film, further reduces the thickness of battery core.
In the embodiment of the present application, wind for convenience, the initiating terminal of the initiating terminal of the first barrier film 30 and the second barrier film 40
It can be joined directly together and connect, as shown in figs. 8-10, i.e., above-mentioned takeup type battery core 1 be prepared using a complete barrier film, so as to simplify
Preparation technology, improves production efficiency；Without the need for the carry out inflection processing to barrier film initiating terminal, so as to further reduction
The thickness of battery core.In the figure 7, on flat battery core thickness direction, continuous the first overlapping barrier film 30 in battery core most inner side and the
The sum of two barrier film 40 is no more than two layers；In figure 9 and in figure 10, on flat battery core thickness direction, battery core most inner side does not connect
Continuous overlapping the first barrier film 30 and the second barrier film 40；And in Fig. 10, barrier film is joined directly together in the initiating terminal of the first pole piece 10,
Most to save the situation of barrier film.
In the embodiment of the present application, in order to improve the bonding between naked battery core and packaging bag, improve anti-dropping capability, takeup type
The end of battery core 1 is provided with one section of barrier film ending section 80 being only made up of the first barrier film 30 and the second barrier film 40, as shown in figure 11, from
And increase the frictional force between naked battery core lateral surface and packaging bag, be conducive to improving the drop resistance of battery.Wherein, barrier film finishes up
Section 80 can be also made up of the first barrier film 30 or the second barrier film 40.
It is further preferred that in the embodiment of the present application, lug can be integrally formed with collector, for example, lug directly by
Collector cutting is formed.Or, lug independently forms and is fixed on corresponding blank collector, or lug is fixed on the recessed of pole piece
On blank collector at groove.It is further preferred that after the welding of the first lug 50 and the first collector maximum gauge be less than or
Equal to 1.5 times of the first lug 50 and the thickness sum of the first collector；And/or, the weldering of the second lug 60 and the second collector
Connect 1.5 times that rear maximum gauge is less than or equal to the thickness sum of the second lug 60 and the second collector.So that lug knot
The thickness of structure is suitable, it is to avoid because the thickness of extreme ear structure is excessive and caused by the excessive defect of welding kesistance, improve the interior of battery core
Portion's symmetry, adds the reliability of extreme ear structure, so as to avoid deformation, improves the overall performance of battery.
In above-mentioned takeup type battery core 1 in the embodiment of the present application, the first pole piece 10 is cathode sheet, and the second pole piece 20 is
Anode pole piece；Or, first pole piece 10 be anode pole piece, the second pole piece 20 be cathode sheet.
It is not for limiting claim, any this area skill although the application is disclosed as above with preferred embodiment
Art personnel can make some possible variations and modification on the premise of the application design is not departed from, therefore the application
The scope that protection domain should be defined by the application claim is defined.
Claims (11)
1. a kind of takeup type battery core, the takeup type battery core is included by the first barrier film, the first pole piece, the second barrier film and the second pole piece
It is connected with the flat battery core of winding, first pole piece on the first lug, second pole piece and is connected with the second pole
Ear；
Characterized in that,
Second pole piece is the second Kong Bo areas, first pole at least in the part of the outmost turns positioned at the takeup type battery core
The part relative away from the face at battery core center with the second Kong Bo areas includes the first Kong Bo areas on piece.
2. takeup type battery core according to claim 1, it is characterised in that with the second Kong Bo areas on first pole piece
Include the first empty set fluid zone towards the relative part in the face at battery core center.
3. takeup type battery core according to claim 1, it is characterised in that
The site that first pole piece is bent for the first time is the first bending place, the initiating terminal of first pole piece to described the
The distance between one bending place is the first pole piece head；The site that second pole piece is bent for the first time is the second bending
Place, the distance between the initiating terminal of second pole piece to second bending place is the second pole piece head；
First lug is arranged in the first pole piece head, and/or, second lug is arranged at second pole piece
In head.
4. takeup type battery core according to claim 1, it is characterised in that
First lug is arranged in the first Kong Bo areas, and/or, second lug is arranged at the second Kong Bo areas
On.
5. takeup type battery core according to claim 1, it is characterised in that
The site that first pole piece is bent for the first time is the first bending place, what second pole piece was bent for the first time
Site is the second bending place；First pole piece includes the first active material layer, and the end of first active material layer is the
One active material layer end；Second pole piece includes the second active material layer, and the end of second active material layer is the
Two active material layer ends,
First bending place is provided with to the first pole piece between the first active material layer end exposes blank collector
The first groove, first lug is fixed in first groove；And/or,
Second bending place is provided with to the second pole piece between the second active material layer end exposes blank collector
The second groove, second lug is fixed in second groove.
6. takeup type battery core according to claim 1, it is characterised in that the initiating terminal of first pole piece is described flat
Inflection forms the first inflection section inside shape battery core, and the inflection site of the first inflection section is the first inflection site；And/or, institute
State initiating terminal inflection formation second inflection section inside the flat battery core of the second pole piece, the inflection of the second inflection section
Site is the second inflection site.
7. the takeup type battery core according to claim 1~6 any claim, it is characterised in that first barrier film
The inflection inside the flat battery core of the initiating terminal of initiating terminal and second barrier film forms barrier film revers turn part.
8. the takeup type battery core according to claim 1~6 any claim, it is characterised in that in flat electricity
On core thickness direction, the continuous overlapping institute in battery core most inner side of the correspondence position of first lug or/and second lug
State the first barrier film and the second barrier film sum is no more than two layers.
9. the takeup type battery core according to claim 1~6 any claim, it is characterised in that first barrier film
Initiating terminal is connected with the initiating terminal of second barrier film.
10. the takeup type battery core according to claim 1~6 any claim, it is characterised in that the takeup type battery core
End is provided with one section of barrier film ending section being only made up of first barrier film and/or second barrier film.
11. the takeup type battery core according to claim 1~6 any claim, it is characterised in that first lug with
Maximum gauge is less than or equal to the thickness sum of first lug and first collector after the welding of first collector
1.5 again；And/or, after the welding of second lug and the second collector maximum gauge be less than or equal to second lug and
1.5 times of the thickness sum of second collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621440669.3U CN206401457U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621440669.3U CN206401457U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206401457U true CN206401457U (en) | 2017-08-11 |
Family
ID=59512256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621440669.3U Active CN206401457U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206401457U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019178771A1 (en) * | 2018-03-21 | 2019-09-26 | 宁德新能源科技有限公司 | Battery cell |
| CN110380108A (en) * | 2018-04-12 | 2019-10-25 | 宁德新能源科技有限公司 | Battery core and electrochemical appliance with it |
| CN110676517A (en) * | 2018-07-03 | 2020-01-10 | 宁德新能源科技有限公司 | Battery cell and battery |
| US11329309B2 (en) | 2017-11-07 | 2022-05-10 | Ningde Amperex Technology Limited | Wound electrode assembly with empty foil segment |
| CN115064783A (en) * | 2017-12-01 | 2022-09-16 | 宁德新能源科技有限公司 | Winding type battery cell |
| WO2023039706A1 (en) * | 2021-09-14 | 2023-03-23 | 宁德新能源科技有限公司 | Battery cell, battery and electrical device |
-
2016
- 2016-12-27 CN CN201621440669.3U patent/CN206401457U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11329309B2 (en) | 2017-11-07 | 2022-05-10 | Ningde Amperex Technology Limited | Wound electrode assembly with empty foil segment |
| CN115064783A (en) * | 2017-12-01 | 2022-09-16 | 宁德新能源科技有限公司 | Winding type battery cell |
| WO2019178771A1 (en) * | 2018-03-21 | 2019-09-26 | 宁德新能源科技有限公司 | Battery cell |
| CN110380108A (en) * | 2018-04-12 | 2019-10-25 | 宁德新能源科技有限公司 | Battery core and electrochemical appliance with it |
| CN110380108B (en) * | 2018-04-12 | 2021-10-08 | 宁德新能源科技有限公司 | Battery cell and electrochemical device with same |
| CN110676517A (en) * | 2018-07-03 | 2020-01-10 | 宁德新能源科技有限公司 | Battery cell and battery |
| CN110676517B (en) * | 2018-07-03 | 2021-06-29 | 宁德新能源科技有限公司 | Battery cell and battery |
| WO2023039706A1 (en) * | 2021-09-14 | 2023-03-23 | 宁德新能源科技有限公司 | Battery cell, battery and electrical device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206401457U (en) | A kind of takeup type battery core | |
| CN206401456U (en) | A kind of takeup type battery core | |
| CN206401455U (en) | A kind of takeup type battery core | |
| CN206532840U (en) | A kind of takeup type battery core | |
| CN206490135U (en) | A kind of takeup type battery core | |
| CN206401440U (en) | A kind of takeup type battery core | |
| CN206451767U (en) | A kind of takeup type battery core | |
| EP3518315B1 (en) | Wound cell | |
| CN106129483B (en) | A kind of takeup type battery core | |
| CN206332097U (en) | A kind of secondary cell battery core | |
| CN103035954A (en) | Winding lithium ion battery and fabrication method thereof | |
| CN206834277U (en) | Takeup type battery core | |
| US20090297946A1 (en) | Soft Packaged And High Capacity Lithium Ion Battery And The Manufacture Method Of The Same | |
| CN104103854B (en) | A kind of stacked column lithium ion battery and preparation method thereof | |
| WO2017152575A1 (en) | Secondary battery tab and secondary battery | |
| CN106058296A (en) | Secondary battery cell | |
| CN205429100U (en) | Lithium ion cell | |
| CN206585017U (en) | A kind of takeup type battery core | |
| CN108615924A (en) | Battery core and the lithium ion battery for using battery core | |
| CN209298283U (en) | A kind of lamination promoting battery core safety | |
| CN107546421B (en) | Winding type battery cell | |
| CN213717028U (en) | Coiling electric core and anti-needling soft package battery comprising same | |
| WO2021003781A1 (en) | Secondary battery | |
| CN203085704U (en) | Lithium ion battery | |
| CN112635774A (en) | Pole piece for button battery, button battery and preparation method of pole piece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |