CN206490135U - A kind of takeup type battery core - Google Patents
A kind of takeup type battery core Download PDFInfo
- Publication number
- CN206490135U CN206490135U CN201621440647.7U CN201621440647U CN206490135U CN 206490135 U CN206490135 U CN 206490135U CN 201621440647 U CN201621440647 U CN 201621440647U CN 206490135 U CN206490135 U CN 206490135U
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- Prior art keywords
- battery core
- inflection
- pole piece
- takeup type
- barrier film
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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
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- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (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 for being stacked and being wound by the initiating terminal of the first pole piece, the first barrier film, the second pole piece, the second barrier film, the head of first pole piece includes the first Kong Bo areas, the inflection of first Kong Bo areas forms the first inflection section, the head of second pole piece includes the second Kong Bo areas, the bearing of trend that the inflection of second Kong Bo areas is formed between the second inflection section, the inflection site of the first pole piece initiating terminal to the first inflection section is opposite with the bearing of trend between the inflection site of the second pole piece initiating terminal to the second inflection section；It is provided with first inflection section in the first lug, the second inflection section and is provided with the second lug.The application can improve the symmetry in a thickness direction of battery core in the case of not off-energy density, and be easy to batch production.
Description
Technical field
The application is related to secondary cell field, specifically, is related to a kind of takeup type battery core.
Background technology
Wide variety of secondary cell, is all made up of the battery core and shell of secondary cell in the market.Wherein, battery core is
Active component, typically by anode pole piece, cathode pole piece and the barrier film being arranged between anode pole piece and cathode pole piece stacking or
Person's winding is formed.Positive plate includes plus plate current-collecting body and is coated in the positive active material on plus plate current-collecting body surface；Negative plate bag
Include negative current collector and be coated in the negative electrode active material on negative current collector surface.
With the commercialized development of secondary battery core, requirement more and more higher of the market to battery core, winding method traditional at present
In, as shown in figure 1, because the length in pole piece head or afterbody Kong Bo areas is different, influence core strueture is symmetrical in a thickness direction
Property, so as to cause the expansion of core material inconsistent, cause the deformation of battery core.
For the defect of prior art, spy proposes 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, including by the first pole piece, the first barrier film, the second pole piece, the second barrier film
The flat battery core that initiating terminal is stacked and wound, the head of first pole piece includes the first Kong Bo areas, and described first is empty
The inflection of paper tinsel area forms the first inflection section, and the head of second pole piece includes the second Kong Bo areas, the second Kong Bo areas inflection shape
Into the second inflection section, bearing of trend between the inflection site of the first pole piece initiating terminal to first inflection section with it is described
Second pole piece initiating terminal is opposite to the bearing of trend between the inflection site of second inflection section；The first inflection Duan Shangshe
It is equipped with the first lug, the second inflection section and is provided with the second lug.
It is preferred that, first pole piece includes the first collector and is arranged at first collector with respect to the of two surfaces
One outer layer diaphragm and the first internal layer diaphragm, the first outer layer diaphragm is arranged on the face at battery core center, in described first
Tunic piece is arranged at towards on the face at battery core center；First pole piece first time behind the inflection site of first inflection section
The site bent is the first bending place；The inflection site that the initiating terminal of the first outer layer diaphragm is located at the first inflection section is arrived
On first collector between first bending place.
It is preferred that, first pole piece site that second bends behind the inflection site of first inflection section is
Second bending place；The initiating terminal of the first internal layer diaphragm is located at the first bending place to described the between second bending place
On one collector.
It is preferred that, the initiating terminal of first pole piece is electric to first collector direction between first bending place
The first coating area for being coated with active material is provided with the surface at core center, on battery core thickness direction, second coating
Area and first lug and the second lug are misaligned.
It is preferred that, on the flat battery core thickness direction, the corresponding position of first lug and/or second lug
The battery core put 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 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, 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, the outmost turns of first pole piece include empty with described first on the first Kong Bo areas, second pole piece
Paper tinsel area includes described in the second Kong Bo areas on the second pole piece with described the away from the relative part in face at the takeup type battery core center
The part that the face at one Kong Bo areas towards the takeup type battery core center is relative includes the second empty set fluid zone.
It is preferred that, the outer peripheral face of the takeup type battery core is the first barrier film and/or the second barrier film.
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.
The technical scheme of the application at least has following beneficial effect：
The application in the case of not off-energy density, can improve the symmetry in a thickness direction of battery core, and
And it is easy to batch production.In the preferred technical scheme of the application, lug, which is located at, to be connected in collector encirclement, can also be reduced
Lug pierces through barrier film, so as to reduce short-circuit risks.
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；
Wherein：
1- takeup type battery cores；
The pole pieces of 10- first；
The collectors of 101- first；
102- the first internal layer diaphragms；
103- the first outer layer diaphragms；
The inflection of 104- first section；
The first Kong Bo of 105- areas；
The pole pieces of 20- second；
The collectors of 201- second；
202- the second internal layer diaphragms；
203- the second outer layer diaphragms；
The inflection of 204- second section；
The second Kong Bo of 205- areas；
The second empty sets of 206- fluid zone；
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；
The coating areas of 90- first.
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 application embodiment is related to a kind of takeup type battery core 1, as shown in Fig. 2 including by the first pole piece 10, first
The flat battery core that barrier film 30, the second pole piece 20, the initiating terminal of the second barrier film 40 are stacked and wound, the head of the first pole piece 10
Portion includes the first Kong Bo areas 105, and the inflection of the first Kong Bo areas 105 forms the first inflection section 104, and the head of the second pole piece 20 includes the
Two Kong Bo areas 205, the inflection of the second Kong Bo areas 205 forms the second inflection section 204, the initiating terminal of the first pole piece 10 to the first inflection section
Bearing of trend and the initiating terminal of the second pole piece 20 between 104 inflection site is between the inflection site of the second inflection section 204
Bearing of trend is on the contrary, be to V shape battery core；It is provided with the first lug 50, the second inflection section 204 and sets in first inflection section 104
It is equipped with the second lug 60.The application is designed to inflection section and by lug by the design in pole piece head Kong Bo areas, and by Kong Bo areas
It is arranged in inflection section, consequently facilitating pole piece head Kong Bo areas are designed into identical length, improve the symmetry of battery core, keep away
The inconsistent institute of expansion for having exempted from core material can caused battery core deformation.
It is preferred that, the first lug 50 is arranged at the inside of the first inflection section 104, and the second lug 60 is located at the second inflection section
204 inside, so that collector surrounds lug, pierces through barrier film, so as to reduce short-circuit risks so as to reduce lug.
Further, as shown in figure 3, the first pole piece 10 includes the first collector 101 and is arranged at the phase of the first collector 101
To the first outer layer diaphragm 103 and the first internal layer diaphragm 102 on two surfaces, the first outer layer diaphragm 103 is arranged at away from battery core center
Face on, the first internal layer diaphragm 102 is arranged at towards on the face at battery core center；Second pole piece 20 includes the He of the second collector 201
It is arranged at the second outer layer diaphragm 203 and the second internal layer diaphragm 202 on relative two surfaces of the second collector 201, the second outer layer diaphragm
203 are arranged on the face at battery core center, and the second internal layer diaphragm 202 is arranged at towards on the face at battery core center；First pole piece
10 sites bent for the first time behind the inflection site of first inflection section 104 are the first bending place；First outer membrane
The initiating terminal of piece 103 is located at the inflection site of the first inflection section 104 to the first collector 101 between the first bending place.From
And the space inside battery core is more fully make use of, the area of active material coating is added, the energy for improving battery core is close
Degree.
It is preferred that, in figure 3, what the first pole piece 10 was bent for the second time behind the inflection site of the first inflection section 104
Site is the second bending place；The initiating terminal of first internal layer diaphragm 102 is located at the first bending place to described between the second bending place
On first collector 101.So that the first internal layer diaphragm 102 is corresponding with the second outer layer diaphragm, when the second pole piece 20 is negative electrode
During pole piece, negative electrode diaphragm is covered by anode diaphragm completely, it is to avoid analysis lithium risk.
In the embodiment of the present application, in order to further increase the coated area of active material, as shown in figure 4, the first pole piece
10 initiating terminal to the first collector 101 between the first bending place towards the surface at battery core center on be provided with coating it is active
First coating area 90 of material, in order to not increase battery core thickness, on battery core thickness direction, the second coating area and the first lug 50
It is misaligned with the second lug 60.Likewise, the second pole piece 20 initiating terminal to the second collector between the second bending place
201 are coated with active material towards can also set on the surface at battery core center, further to increase the coated area of active material.
In the embodiment of the present application, in order to reduce battery core thickness, on flat battery core thickness direction, the first lug 50
And/or second lug 60 correspondence position continuous the first overlapping barrier film 30 in battery core most inner side and the sum of the second barrier film 40 do not surpass
Cross two layers, so as to can not only lift energy density, can also save raw material, reduce the production cost of battery.
In order to further reduce battery core thickness, as shown in figure 5, the first barrier film 30 is connected with the initiating terminal of the second barrier film 40
Connect, i.e., winding battery core is prepared using whole piece barrier film, from without by the inflection of barrier film head.
Produce for convenience, and not off-energy density, in the embodiment of the present application, as shown in fig. 6, the first barrier film 30 rises
The inflection inside flat battery core of the initiating terminal of top and the second barrier film 40 forms barrier film revers turn part 70.Barrier film revers turn part 70 is set
Barrier film is fixed on volume pin by meter during facilitating electric core winding, consequently facilitating production, can improve production efficiency.
In the embodiment of the present application, as shown in fig. 7, in order to improve the bonding between naked battery core and packaging bag, improving anti-drop
Performance, takeup type battery core end 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, from
And increase the frictional force between naked battery core lateral surface and packaging bag, be conducive to improving the drop resistance of battery.Also can be in takeup type
Battery core end is provided with one section of barrier film ending section 80 being only made up of the first barrier film 30 or the second barrier film 40.
In the embodiment of the present application, as shown in figure 8, the outmost turns of the first pole piece 10 include the first Kong Bo areas 105, the second pole piece
The part relative away from the face at takeup type battery core center with the first Kong Bo areas 105 includes the second Kong Bo areas 205, the second pole piece on 20
The part relative with the face at the first Kong Bo areas 105 towards takeup type battery core center includes the second empty set fluid zone 206 on 20.So as to
Vest area is formed on the lateral surface of battery core, makes battery core when facing the abuse situation such as acupuncture or shock, is formed to battery core
Protection, improves the security performance of battery core.
In the embodiment of the present application, as shown in figure 9, the outer peripheral face of takeup type battery core is the first barrier film 30 and the second barrier film 40,
So as to can not only increase the frictional force between naked battery core lateral surface and packaging bag, be conducive to improving the drop resistance of battery, may be used also
The protection to battery core is formed, the security performance of battery core is improved.Also the first barrier film only can be set in the outer peripheral face of takeup type battery core
30 or second barrier film 40.
It is further preferred that maximum gauge is less than or equal to first after the welding of the first lug 50 and the first collector 101
1.5 times of the thickness sum of the collector 101 of lug 50 and first, and/or, the welding of the second lug 60 and the second collector 201
Maximum gauge is less than or equal to 1.5 times of the thickness sum of the second lug 60 and the second collector 201 afterwards.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 (10)
1. a kind of takeup type battery core, the takeup type battery core is included by the first pole piece, the first barrier film, the second pole piece, the second barrier film
The initiating terminal flat battery core that is stacked and winds, it is characterised in that
The head of first pole piece includes the first Kong Bo areas, and the first Kong Bo areas inflection forms the first inflection section, and described the
The head of two pole pieces includes the second Kong Bo areas, and the second Kong Bo areas inflection forms the second inflection section, the first pole piece starting
Hold the bearing of trend and the second pole piece initiating terminal to second inflection between the inflection site of the first inflection section
Bearing of trend between the inflection site of section is opposite；The first lug, the second inflection section are provided with the first inflection section
On be provided with the second lug.
2. takeup type battery core according to claim 1, it is characterised in that first pole piece includes the first collector and set
It is placed in first outer layer diaphragm and first internal layer diaphragm of first collector with respect to two surfaces, the first outer layer diaphragm arrangement
In on the face away from battery core center, the first internal layer diaphragm is arranged at towards on the face at battery core center；First pole piece exists
The site bent for the first time behind the inflection site of the first inflection section is the first bending place；
The initiating terminal of the first outer layer diaphragm is positioned at the inflection site of the first inflection section to the institute between first bending place
State on the first collector.
3. takeup type battery core according to claim 2, it is characterised in that first pole piece is in first inflection section
The site that second bends behind inflection site is the second bending place；It is curved that the initiating terminal of the first internal layer diaphragm is located at first
To on first collector between second bending place at folding.
4. takeup type battery core according to claim 2, it is characterised in that the initiating terminal of first pole piece to described first
First collector between bending place is coated with the first coating of active material towards being provided with the surface at battery core center
Area, on battery core thickness direction, first coating area and first lug and the second lug are misaligned.
5. takeup type battery core according to claim 1, it is characterised in that described on the flat battery core thickness direction
Continuous overlapping first barrier film in the battery core of the correspondence position of first lug and/or second lug most inner side and described the
Two barrier film sums are no more than two layers.
6. takeup type battery core according to claim 1, it is characterised in that the initiating terminal of first barrier film and described second
The inflection inside the flat battery core of the initiating terminal of barrier film forms barrier film revers turn part.
7. takeup type battery core according to claim 1, it is characterised in that the takeup type battery core end is provided with one section only
The barrier film ending section being made up of first barrier film and/or second barrier film.
8. takeup type battery core according to claim 1, it is characterised in that it is empty that the outmost turns of first pole piece include first
Include the away from the relative part in face at the takeup type battery core center with the first Kong Bo areas on paper tinsel area, second pole piece
Part relative with the face at the first Kong Bo areas towards the takeup type battery core center on second pole piece bag described in two Kong Bo areas
Include the second empty set fluid zone.
9. takeup type battery core according to claim 1, it is characterised in that the outer peripheral face of the takeup type battery core be first every
Film and/or the second barrier film.
10. the takeup type battery core according to claim 1~9 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621440647.7U CN206490135U (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 |
|---|---|---|---|
| CN201621440647.7U CN206490135U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206490135U true CN206490135U (en) | 2017-09-12 |
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ID=59771396
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621440647.7U Active CN206490135U (en) | 2016-12-27 | 2016-12-27 | A kind of takeup type battery core |
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| Country | Link |
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| CN (1) | CN206490135U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585928A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Battery core and battery with it |
| CN109755461A (en) * | 2017-11-07 | 2019-05-14 | 宁德新能源科技有限公司 | Wind battery core |
| 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 |
| CN112467187A (en) * | 2020-11-10 | 2021-03-09 | 深圳市诚捷智能装备股份有限公司 | Winding battery cell manufacturing method and winding battery cell |
| CN112768623A (en) * | 2020-12-31 | 2021-05-07 | Oppo广东移动通信有限公司 | Battery and electric core thereof |
| CN113437444A (en) * | 2021-06-23 | 2021-09-24 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| CN115133142A (en) * | 2021-03-24 | 2022-09-30 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| WO2023108372A1 (en) * | 2021-12-13 | 2023-06-22 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric device |
| CN117673438A (en) * | 2024-02-02 | 2024-03-08 | 武汉星纪魅族科技有限公司 | Electrode assembly, battery cell, battery and electric equipment |
-
2016
- 2016-12-27 CN CN201621440647.7U patent/CN206490135U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585928A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Battery core and battery with it |
| CN109755461A (en) * | 2017-11-07 | 2019-05-14 | 宁德新能源科技有限公司 | Wind battery core |
| 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 |
| CN112467187A (en) * | 2020-11-10 | 2021-03-09 | 深圳市诚捷智能装备股份有限公司 | Winding battery cell manufacturing method and winding battery cell |
| CN112768623A (en) * | 2020-12-31 | 2021-05-07 | Oppo广东移动通信有限公司 | Battery and electric core thereof |
| CN115133142A (en) * | 2021-03-24 | 2022-09-30 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN113437444A (en) * | 2021-06-23 | 2021-09-24 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| CN113437444B (en) * | 2021-06-23 | 2023-10-27 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| WO2023108372A1 (en) * | 2021-12-13 | 2023-06-22 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electric device |
| CN117673438A (en) * | 2024-02-02 | 2024-03-08 | 武汉星纪魅族科技有限公司 | Electrode assembly, battery cell, battery and electric equipment |
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