CN208173683U - Wind battery core and battery - Google Patents
Wind battery core and battery Download PDFInfo
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- CN208173683U CN208173683U CN201820592103.5U CN201820592103U CN208173683U CN 208173683 U CN208173683 U CN 208173683U CN 201820592103 U CN201820592103 U CN 201820592103U CN 208173683 U CN208173683 U CN 208173683U
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- extension
- battery core
- bond
- pole piece
- winding battery
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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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Abstract
This application discloses a kind of winding battery core and battery, which includes：First pole piece；Second pole piece；Diaphragm is set between the first pole piece and the second pole piece；And bond；Wherein, along the length direction of winding battery core, diaphragm includes the first extension, the second extension, third extension and the 4th extension beyond the first pole piece and the second pole piece, bond is provided between first extension and the second extension, it is provided with bond between third extension and the 4th extension, is not provided with bond between the second extension and third extension.Winding battery core provided by the present application can at least enhance the anti-contracility and impact resistance ability of diaphragm.
Description
Technical field
This application involves a kind of batteries, more particularly, to a kind of winding battery core.
Background technique
Due to the portability of battery, most of mobile devices such as mobile phone and laptop are all made of secondary cell power supply.
In addition, as electric vehicle, the alternative energy source of the fossil fuel of hybrid vehicle etc. is used for, product is had been obtained in secondary cell
Pole exploitation.Battery is used widely in the high-end consumer electronics field such as laptop computer, mobile phone, digital camera.But make
With situation is inevitably fallen in the process, so that drop performance becomes important one of the security performance of lithium battery.Such as
What improves the drop performance of battery, and the short-circuit risks for reducing battery are urgent problems in field.
Utility model content
For problem present in the relevant technologies, the application's is designed to provide a kind of winding battery core and battery, can
Enhance the anti-contracility and impact resistance ability of diaphragm.
What the technical solution of the application was realized in：
According to the one aspect of the application, a kind of winding battery core is provided, including：First pole piece；Second pole piece；Diaphragm,
It is set between the first pole piece and the second pole piece；And bond；
Wherein, along the length direction of winding battery core, diaphragm include the first extension beyond the first pole piece and the second pole piece,
Second extension, third extension and the 4th extension, are provided with bond, third between the first extension and the second extension
It is provided with bond between extension and the 4th extension, is not provided with bond between the second extension and third extension.
According to an embodiment of the present application, wherein winding battery core includes multiple bonds, multiple along the length direction of diaphragm
The setting of bond interval.
According to an embodiment of the present application, multiple bonds be equal in length or the length of at least two bonds not phase
Deng.
According to an embodiment of the present application, wherein along the length direction of winding battery core, the first extension, the second extension, the
The edge of three extensions and the 4th extension exceeds the edge of bond.
According to an embodiment of the present application, the width of the first extension, the second extension, third extension and the 4th extension
More than or equal to 0.5mm and it is less than or equal to 3mm.
According to an embodiment of the present application, the width of bond is more than or equal to 0.2mm and is less than or equal to 2.5mm.
According to an embodiment of the present application, the thickness of bond is more than or equal to 5 μm and is less than or equal to 50 μm.
According to an embodiment of the present application, the length of multiple bonds is all larger than equal to 0.1mm and is less than or equal to 15mm.
According to an embodiment of the present application, along the length direction of winding battery core, the both ends for winding battery core are provided with bond.
According to further aspect of the application, a kind of battery is additionally provided, which includes winding battery core as described above.
Two diaphragms are bonded by bond, can effectively reinforce the constraint to diaphragm by battery core provided by the present application, from
And diaphragm retracts cause the risk of short circuit and voltage drop when avoiding falling.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that the battery core of the prior art falls the schematic diagram that metacneme shrinks situation；
Fig. 2 is the schematic diagram according to the winding battery core of the application one embodiment；
Fig. 3 is the schematic cross-section in Fig. 2 at A-A；
Fig. 4 is the schematic top plan view according to the membrane surface of the winding battery core of the application one embodiment；
Fig. 5 is the schematic top plan view according to the membrane surface of the winding battery core of the application another embodiment；
Fig. 6 is the schematic cross-section of Fig. 3 septation and bond.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, those of ordinary skill in the art's every other embodiment obtained belong to the application protection
Range.
Below with reference to attached drawing, embodiments herein is specifically described.It should be noted that phase in each attached drawing
Same component has used identical reference label.Each embodiment can be combined with each other in any possible manner below or part is replaced
It changes.
Refering to what is shown in Fig. 1, battery, in falling process, the diaphragm 3 of material softness will receive anode pole piece 1 and cathode pole piece
2 rubbing action and the percussion of electrolyte to the contraction of diaphragm 4 occur, and cannot be effectively isolated 1 He of anode pole piece
Cathode pole piece 2, it is on fire so as to cause internal short-circuit of battery, or even fever.
Referring to figs. 2 and 3, the application provides a kind of winding battery core 100, including：First pole piece 10, the second pole piece 20, every
Film 30 and bond 40.Wherein, diaphragm 30 be arranged between the first pole piece 10 and the second pole piece 20, winding battery core 100 be by
First pole piece 10, diaphragm 30 and the second pole piece 20 winding are formed.Wherein, as shown in Figures 2 and 3, along the length of winding battery core 100
Direction L, diaphragm 30 include prolonging beyond the first pole piece 10 and the first extension 32 of the second pole piece 20, the second extension 34, third
Extending portion 36 and the 4th extension 38.Bond 40, third extension are provided between first extension 32 and the second extension 34
36 and the 4th are provided with bond 40 between extension 38, are not provided with bond between the second extension 34 and third extension 36
40.To which bond 40 be arranged on diaphragm 30 in this way, may make the diaphragm 30 of 20 two sides of the second pole piece viscous
It connects, the second pole piece 20 is avoided to contact with the first pole piece 10.It should be noted that the set-up mode of bond 40 shown in Figure 2
(such as length, quantity etc.) is exemplary, the set-up mode of bond 40 can according to the actual situation depending on.
Wherein, when the first pole piece 10 is anode pole piece, the second pole piece 20 is cathode pole piece；When the first pole piece 10 is cathode
When pole piece, the second pole piece 20 is anode pole piece.Anode pole piece includes plus plate current-collecting body and coated on plus plate current-collecting body surface
The anode active material layer of lithium base oxide.Cathode pole piece includes that negative current collector and the cathode being arranged on negative current collector are living
Property substance.Negative current collector is aluminium foil, and negative electrode active material includes carbon material.Diaphragm setting anode pole piece and cathode pole piece it
Between play insulating effect.Diaphragm can be formed by polyethylene, polypropylene or polyethylene and polyacrylic composition.Diaphragm allows
Lithium ion is exchanged between two pole pieces.Along the length direction L of winding battery core, diaphragm 30 exceeds the first pole piece 10 and the second pole piece
20, contact short circuit between the first pole piece 10 and the second pole piece 20 can be effectively prevented in this way.
Length direction L, width direction W and the thickness direction T of winding battery core are respectively illustrated in Fig. 2 and Fig. 3.Fig. 3 is Fig. 2
Schematic cross-section at middle A-A.Wherein, it should be understood that the length direction L for winding battery core is prolonged with the wireline reel of winding battery core
Stretch the parallel direction in direction.The width direction W of winding battery core refers to the extension for winding surface between the both ends that battery core is bent
Direction.Thickness direction T is perpendicular to length direction L and perpendicular to width direction W.In addition it is to be further understood that winding battery core
Length direction L is the width direction of diaphragm 30, and the coiling direction of battery core is the length direction of diaphragm 30.
For the winding battery core 100 of the application, bond 40 can be set before electric core winding, 40 Pasting of bond every
Film 30, to enhance the anti-contracility and impact resistance ability of diaphragm 30.The winding battery core 100 of the application can effectively add
By force to the constraint of diaphragm 30, so that diaphragm 30 shrinks the risk for causing short circuit and voltage drop when avoiding falling；In addition, in the application
Winding battery core 100 in, pole piece (i.e. the second pole piece 20) between diaphragm 30 pole piece (i.e. first pole piece adjacent with the pole piece
10) it will not contact, so do not need that bond 40 is arranged between the second extension 34 and third extension 36 of diaphragm 30, from
And the unnecessary use of bond 40 can be reduced, the structure of winding battery core 100 is simplified, winding battery core 100 is enhanced
Infiltration.
In some embodiments, along the length direction L of winding battery core, the edge of diaphragm 30 can exceed the side of bond 40
Edge, that is, the first extension 32, the second extension 34, third extension 36 and the 4th extension 38 edge can be beyond bonding
The edge of part 40.In addition it also has the advantage that compared with prior art：Battery core will not be caused long on the length direction of battery core
Overlength is spent, ensure that the high-energy density of electrochemical appliance.Refering to what is shown in Fig. 3, in some embodiments, along the length of winding battery core
Direction L is spent, the edge of diaphragm 30 can be aligned with the edge of bond 40.
Refering to what is shown in Fig. 4, winding battery core 100 includes multiple bonds 40, also, along the length direction of diaphragm 30, it is multiple
Bond 40 is spaced.Wherein, the length direction of diaphragm 30 refers to the length side when diaphragm 30 of winding battery core tiles
To.In this way, by being positioned apart from multiple bonds 40 on diaphragm 30, so the opening between two adjacent bonds 40
It can be conducive to electrolyte to enter, so as to reduce to the influence inside electrolyte immersion battery core, avoid producing battery core effect of impregnation
It is raw to influence.
In some embodiments, the length of multiple bonds 40 is equal.Length direction when tiling along diaphragm 30,
Spacing between two bonds 40 of arbitrary neighborhood can also be equal.In some embodiments, at least two bonding
The length of part 42 is unequal.As shown in figure 4, in the present embodiment, it is respectively the three of L1, L2, L3 that winding battery core 100, which includes length,
A bond 40, length L1, L2, L3 of three bonds 40 are not mutually equal.Wherein, between two bonds 40 of arbitrary neighborhood
Spacing can be unequal.
In some embodiments, the length of multiple bonds 40 is not influencing so in the range of 0.1mm to 15mm
While battery core effect of impregnation, realize to the good constraint effect of diaphragm.Refering to what is shown in Fig. 3, along the length direction of winding battery core
The both ends of L, winding battery core 100 are provided with bond 40.It in another embodiment, can along the length direction L of winding battery core
Any end in winding battery core 100 is provided with bond 40, the other end is not provided with bond 40.
The material component of bond 40 includes but is not limited to polyethylene, polypropylene, polyacrylate, epoxy resin, poly- ammonia
Ester, polyureas, polycarbonate, silicone resin, polyamide etc..Effect is sealed to obtain the better glue of performance, it is two-sided in embodiment
The material component of glue can be any one in the above material, naturally it is also possible to be any a variety of group in the above material
It closes.
Refering to what is shown in Fig. 5, in one embodiment, length direction when tiling along diaphragm 30, bond 40 is also possible to
It is extended continuously.
Refering to what is shown in Fig. 3, in some embodiments, the first extension 32, the second extension 34, third extension 36 and
The width W2 of four extensions 38 is in the range of 0.5mm to 3mm.With reference to shown in Fig. 3 to Fig. 6, the width W1 of bond 40 exists
In the range of 0.2mm to 2.5mm.Refering to what is shown in Fig. 6, the thickness T1 of bond 40 is in the range of 5 μm to 50 μm.As a result, may be used
The overall dimensions of winding battery core 100 are not had an impact dimensionally, and can make simultaneously diaphragm realize good anti-shrink and
Impact-resistant performance.It, can width W2, bond 40 to above-mentioned extension 32 it should be appreciated that according to actual applicable cases
Width W1, the thickness T1 of bond 40, bond 40 length carry out combination appropriate, or carry out other sizes and match
It sets, the application is not limited to this.
According to further aspect of the application, a kind of battery is additionally provided, which includes winding battery core as described above
100。
According to the another aspect of the application, a kind of method for manufacturing above-mentioned winding battery core is additionally provided, this method includes
Following steps：
Step S12 places the second pole piece 20 between two diaphragms 30, makes two diaphragms, 30 marginal adhesion by bond 40
Form electrode assembly；
Step S16 places the first pole piece 10 on electrode assembly.
The first stacked pole piece 10, electrode assembly are wound and form winding battery core 100 by step S18.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this application.
Claims (9)
1. a kind of winding battery core, including：
First pole piece；
Second pole piece；
Diaphragm is set between first pole piece and second pole piece；And
Bond；
Wherein, along the length direction of the winding battery core, the diaphragm includes exceeding first pole piece and second pole piece
The first extension, the second extension, third extension and the 4th extension, first extension and second extension
Between be provided with the bond, be provided with the bond between the third extension and the 4th extension, it is described
The bond is not provided between second extension and the third extension.
2. winding battery core according to claim 1, wherein the winding battery core includes multiple bonds, along described
The length direction of diaphragm, the multiple bond interval setting.
3. winding battery core according to claim 1, wherein along the length direction of the winding battery core, described first extends
Portion, the second extension, third extension and the 4th extension edge exceed the edge of the bond.
4. winding battery core according to claim 1, wherein first extension, the second extension, third extension and
The width of 4th extension is more than or equal to 0.5mm and is less than or equal to 3mm.
5. winding battery core according to claim 1, wherein the width of the bond be more than or equal to 0.2mm and be less than etc.
In 2.5mm.
6. winding battery core according to claim 1, wherein the thickness of the bond is more than or equal to 5 μm and is less than or equal to
50μm。
7. winding battery core according to claim 2, wherein the length of the multiple bond is more than or equal to 0.1mm and small
In equal to 15mm.
8. winding battery core according to claim 1, wherein along the length direction of the winding battery core, the winding battery core
Both ends be provided with the bond.
9. a kind of battery, including such as winding battery core described in any item of the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820592103.5U CN208173683U (en) | 2018-04-24 | 2018-04-24 | Wind battery core and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820592103.5U CN208173683U (en) | 2018-04-24 | 2018-04-24 | Wind battery core and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208173683U true CN208173683U (en) | 2018-11-30 |
Family
ID=64372094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820592103.5U Active CN208173683U (en) | 2018-04-24 | 2018-04-24 | Wind battery core and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208173683U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112820851A (en) * | 2020-12-31 | 2021-05-18 | 宁德新能源科技有限公司 | Battery cell, battery and power utilization device |
| CN112968233A (en) * | 2021-01-29 | 2021-06-15 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| WO2021195906A1 (en) * | 2020-03-31 | 2021-10-07 | 东莞新能安科技有限公司 | Electrochemical apparatus and electronic apparatus using electrochemical apparatus |
| CN113782805A (en) * | 2021-08-27 | 2021-12-10 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN114520374A (en) * | 2022-01-27 | 2022-05-20 | 宁德新能源科技有限公司 | Battery and electronic device thereof |
| EP4064402A3 (en) * | 2021-03-26 | 2022-10-05 | Ningde Amperex Technology Ltd. | Battery cell, battery, and electronic device |
| EP4177998A1 (en) * | 2021-11-04 | 2023-05-10 | Dongguan Poweramp Technology Limited | Electrochemical apparatus, preparation method thereof, and electronic apparatus |
| CN116130850A (en) * | 2023-04-13 | 2023-05-16 | 宁德新能源科技有限公司 | Secondary battery and electric equipment |
-
2018
- 2018-04-24 CN CN201820592103.5U patent/CN208173683U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021195906A1 (en) * | 2020-03-31 | 2021-10-07 | 东莞新能安科技有限公司 | Electrochemical apparatus and electronic apparatus using electrochemical apparatus |
| CN112820851A (en) * | 2020-12-31 | 2021-05-18 | 宁德新能源科技有限公司 | Battery cell, battery and power utilization device |
| CN112968233A (en) * | 2021-01-29 | 2021-06-15 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| EP4064402A3 (en) * | 2021-03-26 | 2022-10-05 | Ningde Amperex Technology Ltd. | Battery cell, battery, and electronic device |
| CN113782805A (en) * | 2021-08-27 | 2021-12-10 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| EP4177998A1 (en) * | 2021-11-04 | 2023-05-10 | Dongguan Poweramp Technology Limited | Electrochemical apparatus, preparation method thereof, and electronic apparatus |
| CN114520374A (en) * | 2022-01-27 | 2022-05-20 | 宁德新能源科技有限公司 | Battery and electronic device thereof |
| CN116130850A (en) * | 2023-04-13 | 2023-05-16 | 宁德新能源科技有限公司 | Secondary battery and electric equipment |
| CN116130850B (en) * | 2023-04-13 | 2024-01-16 | 宁德新能源科技有限公司 | Secondary battery and electric equipment |
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