CN206003898U - A kind of takeup type battery core - Google Patents
A kind of takeup type battery core Download PDFInfo
- Publication number
- CN206003898U CN206003898U CN201621069475.7U CN201621069475U CN206003898U CN 206003898 U CN206003898 U CN 206003898U CN 201621069475 U CN201621069475 U CN 201621069475U CN 206003898 U CN206003898 U CN 206003898U
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- Prior art keywords
- battery core
- pole piece
- barrier film
- head
- lug
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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
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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
- 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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- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application is related to a kind of takeup type battery core, the takeup type battery core 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 the first pole piece is Kong Bo area and is electrically connected with the first lug that the head of the second pole piece is Kong Bo area and is electrically connected with the second lug；The initiating terminal of the first pole piece is the first initiating terminal, and the initiating terminal of the second pole piece is the second initiating terminal, and the distance between second initiating terminal to the second lug is the second pole piece head；Second pole piece head forms the second inflection section in the internal inflection of flat battery core, and on flat battery core thickness direction, the second inflection section is misaligned with first lug.The application is compensate for the asymmetry of core strueture, is improved the deformation of battery core by the bending to the second pole piece head Kong Bo area inside 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
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, be typically laminated by anode pole piece, cathode pole piece and the barrier film being arranged between anode pole piece and cathode pole piece 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 business-like development of secondary battery core, requirement more and more higher of the market to battery core, traditional at present winding method
In, as shown in figure 1, as the length in pole piece head or afterbody Kong Bo area is different, impact core strueture is symmetrical in a thickness direction
Property, the expansion so as to cause core material are inconsistent, cause the deformation of battery core.
For the defect of prior art, special proposition the application.
Utility model content
The primary goal of the invention of the application is to propose a kind of takeup type battery core.
In order to complete the purpose of the application, the technical scheme of employing is：
The application is related to a kind of takeup type battery core, and the takeup type battery core is included by the first pole piece, the first barrier film, the second pole
The flat battery core that piece, the initiating terminal of the second barrier film are stacked and wind, the head of first pole piece is Kong Bo area and electricity
The first lug is connected with, the head of second pole piece is Kong Bo area and is electrically connected with the second lug；
The initiating terminal of first pole piece is the first initiating terminal, and the initiating terminal of second pole piece is the second initiating terminal, institute
State the second initiating terminal to the distance between second lug be the second pole piece head；
The second pole piece head forms the second inflection section in the internal inflection of the flat battery core, in flat electricity
On core thickness direction, the second inflection section is misaligned with first lug.
Preferably, first initiating terminal to the distance between first lug be the first pole piece head, described flat
On flat-shaped battery core thickness direction, the second inflection section is misaligned with the first pole piece head.
Preferably, on the flat battery core thickness direction, the second inflection section is misaligned with second lug.
Preferably, flat battery core center line in the direction of the width is battery core center line, by second inflection
Section inflection point and the line parallel with the battery core center line be the second folding line；
The initiating terminal of first barrier film to the distance between second folding line be the first barrier film head, described second
The initiating terminal of barrier film to the distance between second folding line be the second barrier film head；The first barrier film head and described
Two barrier film heads are be arranged in parallel along the flat battery core width, or the first barrier film head and second diaphragm heads
Portion forms barrier film revers turn part in the internal inflection of the flat battery core.
Preferably, the length of the length of the first barrier film head and the second barrier film head is all higher than the second inflection section
Length.
Preferably, flat battery core center line in the direction of the width is battery core center line, first pole piece first
The secondary site that bending occurs is the first bending place, by first bending place and the line parallel with the battery core center line is first
Folding line；
First lug is less than second lug to first folding line to the distance of first folding line
Distance, on the flat battery core thickness direction, the barrier film revers turn part is misaligned with first lug.
Preferably, on the flat battery core thickness direction, the barrier film revers turn part and first lug and/or institute
State the second lug all misaligned.
Preferably, the takeup type battery core end is provided with one section and is only made up of first barrier film and/or the second barrier film
Barrier film ending section.
Preferably, the inflection direction of the second inflection section is identical with coiling direction or contrary.
Preferably, first pole piece is cathode pole piece, and second pole piece is anode pole piece；Or, first pole piece
For anode pole piece, second pole piece is cathode pole piece.
The technical scheme of the application at least has following beneficial effect：
The application compensate for the asymmetric of core strueture by the bending to the second pole piece head Kong Bo area inside battery core
Property, improve the deformation of battery core.
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 specific embodiment of the application；
Fig. 3 is the takeup type core strueture schematic diagram in a certain specific embodiment of the application；
Fig. 4 is the takeup type core strueture schematic diagram in a certain specific embodiment of the application；
Fig. 5 is the takeup type core strueture schematic diagram in a certain specific embodiment of the application；
Fig. 6 is the takeup type core strueture schematic diagram in a certain specific embodiment of the application；
Fig. 7 is the takeup type core strueture schematic diagram in a certain specific embodiment of the application；
Wherein：
1- flat battery core；
The first pole piece of 10-；
The first initiating terminal of 101-；
102- the first pole piece head；
The first bending place of 103-；
The second pole piece of 20-；
The second initiating terminal of 201-；
202- the second pole piece head；
203- the second inflection section；
The first barrier film of 30-；
301- the first barrier film head；
The second barrier film of 40-；
401- the second barrier film head；
The first lug of 50-；
The second lug of 60-；
70- barrier film revers turn part；
80- barrier film ending section.
Specific 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 limit scope of the present application.
The invention relates to a kind of takeup type battery core, including by the first pole piece 10, the first barrier film 30, the second pole piece
20th, the flat battery core that the initiating terminal of the second barrier film 40 is stacked and winds, the head of the first pole piece 10 is Kong Bo area and electricity
The first lug 50 is connected with, the head of the second pole piece 20 is Kong Bo area and is electrically connected with the second lug 60；First lug 50 and
Two lugs 60 are misaligned on the thickness direction of flat battery core；In order to make up the asymmetry of core strueture, the application is to volume
Wound battery core has carried out following improvement：The pole piece of Kong Bo area head is carried out inflection by the application, from having filled up another sky paper tinsel
The remaining space inside battery core of the shorter pole piece in area, so as to improve the asymmetry of core strueture.
Specifically, flat battery core center line in the direction of the width is battery core center line, and the first pole piece 10 occurs for the first time
The site of bending be the first bending place 103, by the first bending place 103 and the line parallel with battery core center line be the first folding line；
The initiating terminal of the first pole piece 10 is the first initiating terminal 101, and the initiating terminal of the second pole piece 20 is the second initiating terminal 201；Second starting
The distance between 201 to the second lug 60 of end is the second pole piece head 202；Second pole piece head 202 is inside flat battery core
Inflection forms the second inflection section 203.Wherein, the direction of inflection can be identical with coiling direction or contrary.
In order to increase the symmetry of battery core further, the first lug 50 and the second lug 60 can be located at battery core center line respectively
Both sides.
In order to increase the symmetry of battery core further, by the inflection point of the second inflection section 203 and parallel with battery core center line
Line be the second folding line, the second folding line is symmetrical arranged along battery center line with the first folding line.That is, the second inflection section 203
One end of most inner side on the width of flat battery core, the inflection point of the second inflection section 203 and the first inflection point are to battery core
The distance of center line is equal, so as to filling up the first pole piece 10 completely in the internal remaining space of battery core, improves the not right of battery core
Title property.
In the embodiment of the present application, the second inflection section 203 arbitrarily can be arranged, and in order to reduce the thickness of battery core further, carry
The energy density of high battery core, as shown in Fig. 2 on flat battery core thickness direction, the second inflection section 203 and the first lug 50 are not
Overlap, so as to the position of battery core thickness maximum can be avoided.
In order to reduce battery core thickness further, as shown in figure 3, the first initiating terminal to the distance between first lug is
First pole piece head 102, on flat battery core thickness direction, the second inflection section 203 is misaligned with the first pole piece head 102,
In this application, the first pole piece head 102 refers to the distance between first 101 to the first lug of initiating terminal 50, so as to making
Two inflection sections 203 are not overlapped with the Kong Bo area of the first pole piece head 102, reduce the thickness of battery core further.
In order to reduce battery core thickness further, as shown in figure 4, on flat battery core thickness direction, the second inflection section 203
All misaligned with the first lug 50 and the second lug 60.
In the embodiment of the present application, the design of barrier film can as conventional design, with the first pole piece 10, the first barrier film 30,
Second pole piece 20, the initiating terminal of the second barrier film 40 are sequentially stacked and are wound, as shown in figs. 2 to 4, the starting of the first barrier film 30
Hold the distance between second folding line for the first barrier film head 301, the initiating terminal of the second barrier film 40 is between the second folding line
Distance be the second barrier film head 401；First barrier film head 301 and the second barrier film head 401 are along flat battery core width
It is arranged in parallel, i.e., wound on the internal blank coil of battery core one week, the barrier film of 4 layers of formation is continuously stacked.
The embodiment of the present application can save former material by being designed to the length of barrier film head to reduce the use of barrier film
Material, as shown in figure 5, the length of the length of the first barrier film head 301 and the second barrier film head 401 is respectively less than the first folding line and the
The distance between two folding lines.In order to ensure isolation effect of the barrier film to pole piece, the length of the first barrier film head 301 and second every
The length of film head 401 is all higher than the length of the second inflection section 203.
The first barrier film of the embodiment of the present application head 301 and the second barrier film head 401 are formed in the internal inflection of flat battery core
Barrier film inflection section 70.As shown in Figures 6 and 7, the distance of first the 50 to the first folding line of lug is curved less than the second lug 60 to the first
The distance of broken line, on flat battery core thickness direction, barrier film revers turn part 70 is misaligned with the second lug 60, so as to can be further
Increase the symmetry of battery core.The inflection direction of barrier film revers turn part 70 can be identical with coiling direction or contrary.
In order to reduce the thickness of battery core further, as shown in fig. 7, on flat battery core thickness direction, barrier film revers turn part
All misaligned with the first lug 50 and the second lug 60.
In the embodiment of the present application, in order to improve the anti-dropping capability of battery core, as shown in Figure 2 to 7, in takeup type battery core
End be provided with one section be only made up of the first barrier film 30 and the second barrier film 40 barrier film ending section 80, so as to can increase naked battery core with
Frictional force between packaging foil, can reduce the impulsive force that naked battery core main body is subject in falling process, improve the anti-drop of battery core
Performance.
In the embodiment of the present application, the coiling direction of battery core is counterclockwise or clockwise, depending on cell winding device.
In the embodiment of the present application, when the first pole piece 10 is anode pole piece, the second pole piece 20 is cathode pole piece；Or, working as
When first pole piece 10 is cathode pole piece, the second pole piece 20 is anode pole piece.Preferably, when the first pole piece 10 is anode pole piece, the
It is Copper Foil that two pole pieces 20 are cathode pole piece, i.e. the second pole piece.According to the needs of design, the first barrier film can be combined into the second barrier film
One barrier film.
Although the application is disclosed as above with preferred embodiment, it is not any this area skill for limiting claim
Art personnel can make some possible variations and modification on the premise of conceiving without departing from the application, 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 are 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, the head of first pole piece is Kong Bo area and is electrically connected with the first pole
Ear, the head of second pole piece are Kong Bo area and are electrically connected with the second lug；
Characterized in that, the initiating terminal of first pole piece is the first initiating terminal, the initiating terminal of second pole piece is second
Top, the distance between described second initiating terminal to second lug are the second pole piece head；
The second pole piece head forms the second inflection section in the internal inflection of the flat battery core, thick in the flat battery core
On degree direction, the second inflection section is misaligned with first lug.
2. takeup type battery core according to claim 1, it is characterised in that first initiating terminal to first lug it
Between distance be the first pole piece head, on the flat battery core thickness direction, the second inflection section and first pole
Sheet head is misaligned.
3. takeup type battery core according to claim 1, it is characterised in that on the flat battery core thickness direction, institute
State the second inflection section misaligned with second lug.
4. takeup type battery core according to claim 1, it is characterised in that the flat battery core in the direction of the width in
Heart line is battery core center line, by the inflection point of the second inflection section and the line parallel with the battery core center line is second to bend
Line；
The initiating terminal of first barrier film is the first barrier film head to the distance between second folding line, second barrier film
Initiating terminal to the distance between second folding line be the second barrier film head；The first barrier film head with described second every
Film head is be arranged in parallel along the flat battery core width, or the first barrier film head and the second barrier film head exist
The internal inflection of the flat battery core forms barrier film revers turn part.
5. takeup type battery core according to claim 4, it is characterised in that the length of the first barrier film head and second every
The length of film head is all higher than the length of the second inflection section.
6. takeup type battery core according to claim 4, it is characterised in that the flat battery core in the direction of the width in
Heart line is battery core center line, and it is the first bending place that first pole piece occurs the site of bending for the first time, bends by described first
Place and the line parallel with the battery core center line are the first folding line；
First lug is less than second lug to the distance of first folding line to the distance of first folding line,
On the flat battery core thickness direction, the barrier film revers turn part is misaligned with first lug.
7. takeup type battery core according to claim 4, it is characterised in that on the flat battery core thickness direction, institute
State barrier film revers turn part all misaligned with first lug and/or second lug.
8. takeup type battery core according to claim 1, it is characterised in that the takeup type battery core end is only provided with a section
The barrier film ending section being made up of first barrier film and/or the second barrier film.
9. takeup type battery core according to claim 1, it is characterised in that the inflection direction of the second inflection section and winding
Direction is identical or contrary.
10. the takeup type battery core according to claim 1～9 any claim, it is characterised in that first pole piece is
Cathode pole piece, second pole piece are anode pole piece；Or, first pole piece is anode pole piece, second pole piece is negative pole
Pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069475.7U CN206003898U (en) | 2016-09-22 | 2016-09-22 | A kind of takeup type battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069475.7U CN206003898U (en) | 2016-09-22 | 2016-09-22 | A kind of takeup type battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206003898U true CN206003898U (en) | 2017-03-08 |
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ID=58194210
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621069475.7U Active CN206003898U (en) | 2016-09-22 | 2016-09-22 | A kind of takeup type battery core |
Country Status (1)
| Country | Link |
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| CN (1) | CN206003898U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2020118884A1 (en) * | 2018-12-12 | 2020-06-18 | 宁德时代新能源科技股份有限公司 | Wound-type cell, lithium ion secondary battery and negative electrode plate |
| CN115051045A (en) * | 2022-08-16 | 2022-09-13 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and power consumption device |
-
2016
- 2016-09-22 CN CN201621069475.7U patent/CN206003898U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2020118884A1 (en) * | 2018-12-12 | 2020-06-18 | 宁德时代新能源科技股份有限公司 | Wound-type cell, lithium ion secondary battery and negative electrode plate |
| CN111312987A (en) * | 2018-12-12 | 2020-06-19 | 宁德时代新能源科技股份有限公司 | Winding type battery cell, lithium ion secondary battery and negative pole piece |
| CN111312987B (en) * | 2018-12-12 | 2021-08-17 | 宁德时代新能源科技股份有限公司 | Winding type battery cell, lithium ion secondary battery and negative pole piece |
| US11824167B2 (en) | 2018-12-12 | 2023-11-21 | Contemporary Amperex Technology Co., Limited | Wound electrode assembly, lithium-ion secondary battery and negative electrode plate |
| CN115051045A (en) * | 2022-08-16 | 2022-09-13 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and power consumption device |
| CN115051045B (en) * | 2022-08-16 | 2022-11-22 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and power consumption device |
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| GR01 | Patent grant |