CN208352449U - A kind of battery core and lithium battery - Google Patents
A kind of battery core and lithium battery Download PDFInfo
- Publication number
- CN208352449U CN208352449U CN201820516908.1U CN201820516908U CN208352449U CN 208352449 U CN208352449 U CN 208352449U CN 201820516908 U CN201820516908 U CN 201820516908U CN 208352449 U CN208352449 U CN 208352449U
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- battery core
- tab
- aperture
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- line
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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
Abstract
The utility model relates to battery technology field, a kind of battery core and lithium battery are disclosed, to enhance the diaphragm constraint in battery core head tab region, the diaphragm for reducing battery core head falls failure probability, to improve the anti-dropping capability of battery core.The battery core includes first end, the first tab component and the first glue-line, the first tab component and first glue-line are all set in the first end of the battery core, wherein, first glue-line includes the first aperture, and the first tab component is from first aperture.
Description
Technical field
The utility model relates to battery technology field, in particular to a kind of battery core and lithium battery.
Background technique
Currently, constantly increase to the attention degree of lithium battery security performance in the market, the requirement to drop test is also further
Strictly.In real life application, the digital equipments such as mobile phone inevitably fall damage by some, and drop performance becomes
A kind of vital lithium battery security performance.But it with the continuous promotion of lithium battery energy density and cycle life, needs
Guarantor's liquid measure level is higher, and the difficulty that drop test passes through is increasing.Fall failure and include Multiple Failure Modes, as packaging bag is broken
Damage leakage, pole piece tearing, tab fall off, diaphragm retracts etc..Wherein diaphragm retracts, which expose anode and cathode, leads to short circuit, is current many
The dominant failure mode of battery core.Diaphragm retracts have the characteristics that easily generation, short circuit harm are big, become and restrict lithium battery anti-drop
An important factor for energy.For this reason, it may be necessary to targetedly be improved.
Utility model content
The utility model provides a kind of battery core and lithium battery, to enhance the diaphragm constraint in battery core head tab region, drop
The diaphragm on low battery core head falls failure probability, to improve the anti-dropping capability of battery core.
In order to achieve the above objectives, the utility model the following technical schemes are provided:
A kind of battery core, including first end, the first tab component and the first glue-line, the first tab component and described
One glue-line is all set in the first end of the battery core, wherein first glue-line includes the first aperture, the first tab group
Part passes through first aperture.
Optionally, the tab component also includes the second tab component, and the second tab component passes through described first and opens
Hole.
Optionally, the battery core also includes the second tab component, and first glue-line also includes the second aperture, described
Two tab components pass through second aperture.
Optionally, the battery core also includes the second glue-line and the second tab component, and second glue-line is arranged at described
The first end of battery core, second glue-line include third aperture, and the second tab component passes through the third aperture.
Preferably, the battery core also includes the second end, the second glue-line and the second tab component, and second glue-line is set
It is placed in the second end of the battery core, second glue-line includes third aperture, and the second tab component passes through the third
Aperture.
Optionally, the first tab component includes tab and protective layer, and the protective layer is set to the tab surface,
Along the tab thickness direction, the protective layer thickness is 0.01~1 millimeter, along tab width direction, the protective layer width
It is 0.5~4 millimeter.
Optionally, the first tab component includes tab and protective layer, and the protective layer is set to the tab surface,
Along the tab thickness direction, the protective layer thickness is 0.04~0.15 millimeter, along tab width direction, the protection slice width
Degree is 1.5~3 millimeters.
Preferably, the first tab component the orthographic projection on the surface of first end where first aperture with it is described
There is gap between first verge of opening.
Preferably, the gap width is 0.1~10 millimeter.
Preferably, first aperture is rectangle, arc or polygon.
Optionally, first aperture is rectangle, and along tab thickness direction, the gap width is 0.1~5 millimeter；Edge
Tab width direction, the gap width are 0.1~10 millimeter.
Optionally, first aperture is rectangle, and along tab thickness direction, the gap width is 0.5~3 millimeter；Edge
Tab width direction, the gap width are 1~6 millimeter.
Preferably, orthographic projection of the tab component on surface where first aperture connects with the verge of opening
Touching.
The battery core of the utility model embodiment improves battery core end regions by being bonded winding glue-line in tab end
Diaphragm is bound and battery core entirety tightness.The glue-line of winding greatly strengthens the constraint effect of battery core end diaphragm, can
It effectively prevent the outer diaphragm in end tab region to shrink.Diaphragm retracts, yin occur for battery core when to reduce drop test
Anode strip slides the probability for causing the failures such as short circuit, improves the anti-dropping capability of battery core.
A kind of lithium battery, including battery core as described above.
Lithium battery provided by the utility model has above-mentioned battery core, also can be improved the diaphragm constraint of battery core end regions
Property and battery core entirety tightness, to reduce when drop test, diaphragm retracts occur for battery core, anode and cathode slice sliding causes short circuit etc.
The probability of failure improves the anti-dropping capability of battery core.
Detailed description of the invention
Fig. 1 is the Section A-A schematic diagram for the battery core that an embodiment of the present invention provides；
Fig. 2 is the top view for the battery core that an embodiment of the present invention provides；
Fig. 3 is the top view for the battery core that another embodiment of the utility model provides；
Fig. 4 is the top view for the battery core that the utility model still another embodiment provides；
Fig. 5 is the main view for the battery core that the utility model still another embodiment provides；
Fig. 6 is anode and cathode slice in lithium battery electric core provided by the embodiment of the utility model and the signal of the partial structurtes at diaphragm
Figure；
Fig. 7 is the top view for the battery core that the utility model another embodiment provides；
Fig. 8 is the section B-B schematic diagram for the battery core that the utility model another embodiment provides；
Fig. 9 is that the vertical view for the battery core that the utility model still another embodiment provides (looks up) figure；
The structural schematic diagram of Figure 10 cell polar ear component provided by the embodiment of the utility model；
Figure 11 is the partial schematic diagram of cell polar ear component and tapping provided by the embodiment of the utility model.
Appended drawing reference:
11- first end
12- the second end
2- tab component
21- the first tab component
22- the second tab component
201- tab
202- protective layer
3- glue-line
The first glue-line of 31-
The second glue-line of 32-
4- aperture
The first aperture of 41-
The second aperture of 42-
43- third aperture
The gap 5-
61- anode strip
62- cathode sheets
63- diaphragm
Specific embodiment
For improve battery core end regions diaphragm is bound and battery core entirety tightness, to reduce battery core when drop test
Generation diaphragm retracts, anode and cathode slice sliding cause the probability of the failures such as short circuit, improve the anti-dropping capability of battery core, the utility model
Embodiment provides a kind of battery core and lithium battery.To keep the purpose of this utility model, technical solution and advantage clearer, below
The utility model is described in further detail for embodiment.
With reference to the battery core that Fig. 1 and Fig. 2, an embodiment of the present invention are provided, including first end 11, the first tab component
21 and first glue-line 31, wherein the first tab component 21 and the first glue-line 31 are all set in the first end 11 of battery core, the first glue
Layer 31 has the first aperture 41, and the first tab component 31 passes through the first aperture 41.
Further, which also includes the second tab component 22, and the second tab component 22 passes through the first aperture 41.
Specifically, as shown in figure 3, battery core also includes the second pole in the battery core of the utility model another specific embodiment
Ear component 22, first glue-line 31 also include the second aperture 42, and the first tab component 21 passes through the first aperture 41, the second tab group
Part 22 passes through the second aperture 42.The battery core of the utility model embodiment at the tab component of battery core end by being bonded winding glue
Layer, improve battery core end regions diaphragm is bound and battery core entirety tightness.The glue-line of winding enhance battery core end every
The constraint effect of film can effectively prevent the outer diaphragm of end tab device region to shrink.To reduce drop test
When diaphragm retracts occur for battery core, anode and cathode slice sliding causes the probability of the failures such as short circuit, improve the anti-dropping capability of battery core.
In addition, the utility model embodiment is not defined the concrete type of battery core, such as Fig. 2, Fig. 3, Fig. 4, Fig. 6 and figure
Shown in 7, optionally, when battery core is winding battery core, there is anode strip 61, cathode sheets 62 and the diaphragm of winding setting in winding battery core
63, and diaphragm 63 is set between anode strip 61 and cathode sheets 62, tab component 2 is set to anode strip 61 and cathode sheets 62；Or
Person, battery core are laminated cell (being not shown in Figure of description), have the anode strip and cathode sheets of overlapping setting in laminated cell,
And diaphragm is provided between anode strip and cathode sheets, the tab component is set to the anode strip and the cathode sheets.Winding
The advantage of production battery core is simple process, at low cost, and the advantage of lamination production battery core is that battery core quality is good.The present embodiment
Anode strip include band-like base, band-like substrate surface is coated with anode material；Cathode sheets include band-like base, band-like base's table
Face is coated with cathode material.
In the still another embodiment of the utility model, with reference to Fig. 4 and Fig. 5, in the battery core of the utility model embodiment
In, it also include the second glue-line 32 and the second tab component 22, the second glue-line 32 protects third aperture 43, the second tab component
22 pass through third aperture 43.First glue-line 31 and the second glue-line 32 are all set in first end 11.The battery core of the present embodiment is
Two tab component outer rings of one end are bonded winding glue-line, and the region between two tab components is also bonded and is wound with
Glue-line further enhances the constraint effect and battery core entirety tightness of battery core end diaphragm, to further increase battery core
Anti-dropping capability.
In the still another embodiment of the utility model, with reference to Fig. 7, Fig. 8 and Fig. 9, in the utility model embodiment
In battery core, battery core also includes the second end 12, and the first glue-line 31 is set to first end 11, and the second glue-line 32 is set to second end
Portion 12.The battery core of the present embodiment is bonded winding glue-line in the tab component outer ring of first end and the second end, further increases
The strong constraint effect and battery core entirety tightness of battery core end diaphragm, to further increase the anti-dropping capability of battery core；Together
When can also save glue-line, avoid waste.
With reference to Figure 10 and Figure 11, tab component 2 in the utility model embodiment 4 place surface of aperture orthographic projection with
There is gap 5 between 4 edge of aperture.Aperture is set on glue-line, the utility model embodiment not to the canoe of glue-line into
Row limits, and can select glue-line being wound in battery core end across tab by manual operation or automation equipment according to the actual situation
Portion.The adhesive faces of adhesive tape are closely bonded with tab side respectively, are fettered the diaphragm of end and are bound battery core simultaneously.The aperture of glue-line
Area is greater than tab cross-sectional area and verge of opening does not contact tab, i.e. aperture and tab has spacing；Guaranteeing battery core end
While the constraint effect and battery core entirety tightness of diaphragm, each structure in battery core end not will form any interference.
Further, in embodiments of the present invention, 5 width of gap is preferably 0.1~10 millimeter.The present invention is not to aperture
Shape is specifically limited, and can be rectangle, arc or polygon, rectangular opening when attached drawing is only the utility model embodiment
Example, should not be construed as the restriction to the utility model.In practical applications, the cross section of gap width and aperture and tab
Shape is related, can carry out width adaptation according to the specific situation that is applicable in, by the lot of experiment validation of inventor, when aperture is rectangle
When, along tab thickness (direction C-C) direction, gap width is 0.1~5 millimeter；Along tab width direction (direction D-D), gap
Width is 0.1~10 millimeter.Alternatively, along tab thickness direction (direction C-C), gap width is 0.5~3 when aperture is rectangle
Millimeter；Along tab width direction (direction D-D), gap width is 1~6 millimeter.The positive throwing on tab component surface where aperture
Shadow is in contact with verge of opening.Protective layer is opened with adjacent rectangle to be referred to for tab component shown in Fig. 2 and opening gaps
Bore edges gap.
In the utility model embodiment, with reference to Figure 10, tab component 2 includes tab 201 and protective layer 202, protective layer
202 are set to 201 surface of tab, and along 201 thickness direction of tab (direction C-C), protective layer 202 is with a thickness of 0.01~1 millimeter, edge
201 width direction of tab (direction D-D), protective layer 202 is with a thickness of 0.5~4 millimeter.Alternatively, tab component 2 includes tab 201
With protective layer 202, protective layer 202 is set to 201 surface of tab, and along 201 thickness direction of tab, protective layer 202 is with a thickness of 0.04
~0.15 millimeter, along 201 width direction of tab, protective layer 202 is with a thickness of 1.5~3 millimeters.Described in the utility model embodiment
Tab thickness refer to the unilateral thickness of single tab.Tab is exactly that the metal for extracting anode and cathode slice from battery core is led
The contact point of electric body, i.e. the battery battery core positive and negative polarities when carrying out charge and discharge.The material of tab includes three kinds, with battery battery core sun
The connected tab of pole piece is aluminium material, and the tab being connected with battery battery core cathode sheets is nickel material or copper nickel plating material.Tab is protected
Sheath is the part insulated on tab, its effect prevented when being battery battery core encapsulation the aluminum plastic film of tab sheet metal and battery it
Between short circuit occurs, and be bonded together when encapsulating by heating and aluminum plastic film hot-melting sealed and prevent leakage.Tab protective layer
Material includes black glue, white glue and three kinds of single layer glue.
Further, the battery core of the utility model embodiment also needs injection electrolyte in the specific use process.Electrolyte
The carrier of battery intermediate ion transmission, electrolyte plays the role of conducting ion between the positive and negative electrode of battery battery core, be lithium from
Sub- battery obtains the guarantee of the advantages that high voltage, high specific energy.Electrolyte generally by the organic solvent of high-purity, electrolyte lithium salt,
The raw materials such as necessary additive are formulated under certain condition, by a certain percentage.Preferably, the utility model embodiment
Anode strip include band-like base, band-like substrate surface is coated with anode material；Cathode sheets include band-like base, band-like base's table
Face is coated with cathode material.Cell positive material (battery core cathode) occupies larger proportion, therefore the property of positive electrode in lithium battery
The performance of lithium ion battery can be directly affected, cost also directly determines battery cost height.Anode material of lithium battery (battery core
Cathode) it include cobalt acid lithium, LiMn2O4, LiFePO4 and nickel-cobalt-manganese ternary material etc..The negative electrode material (battery core anode) of battery is wrapped
It includes following several: graphitized carbon material, amorphous carbon material, nitride, silica-base material, tin-based material, novel alloy and other
Material.The utility model without specifically limiting, can select this as the case may be.
The utility model embodiment additionally provides a kind of lithium battery, including battery core as described above.The utility model provides
Lithium battery there is above-mentioned battery core, also can be improved battery core end regions diaphragm is bound and battery core entirety tightness, from
And diaphragm retracts occur for battery core when reducing drop test, anode and cathode slice sliding causes the probability of the failures such as short circuit, improve battery core
Anti-dropping capability.
Obviously, those skilled in the art the utility model embodiment can be carried out various modification and variations without departing from
The spirit and scope of the utility model.In this way, if these modifications and variations of the present invention belong to the utility model right
It is required that and its within the scope of equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (14)
1. a kind of battery core, including first end, the first tab component and the first glue-line, the first tab component and described first
Glue-line is arranged at the first end of the battery core, wherein first glue-line includes the first aperture, the first tab component
Across first aperture.
2. battery core according to claim 1, also includes the second tab component, the second tab component passes through described first
Aperture.
3. battery core according to claim 1 includes also the second tab component, first glue-line also includes the second aperture,
The second tab component passes through second aperture.
4. battery core according to claim 1, also includes the second glue-line and the second tab component, second glue-line is set
In the first end of the battery core, second glue-line includes third aperture, and the second tab component passes through the third and opens
Hole.
5. battery core according to claim 1, the battery core also includes the second end, the second glue-line and the second tab component,
Second glue-line is arranged at the second end of the battery core, and second glue-line includes third aperture, second tab
Component passes through the third aperture.
6. battery core according to claim 1, wherein the first tab component includes tab and protective layer, the protection
Layer is set to the tab surface, and along the tab thickness direction, the protective layer thickness is 0.01~1 millimeter, wide along tab
Direction is spent, the protective layer width is 0.5~4 millimeter.
7. battery core according to claim 6, wherein the first tab component includes tab and protective layer, the protection
Layer is set to the tab surface, and along the tab thickness direction, the protective layer thickness is 0.04~0.15 millimeter, along tab
Width direction, the protective layer width are 1.5~3 millimeters.
8. battery core according to claim 6, wherein the first tab component is in first aperture in first end
There is gap between the orthographic projection on surface and first verge of opening.
9. battery core according to claim 8, wherein the width in the gap is 0.1~10 millimeter.
10. battery core according to claim 8, wherein first aperture is rectangle, arc or polygon.
11. battery core according to claim 8, wherein first aperture is rectangle, along tab thickness direction, between described
The width of gap is 0.1~5 millimeter；Along tab width direction, the width in the gap is 0.1~10 millimeter.
12. battery core according to claim 11, wherein first aperture is rectangle, along tab thickness direction, between described
The width of gap is 0.5~3 millimeter；Along tab width direction, the width in the gap is 1~6 millimeter.
13. battery core according to claim 1, wherein the first tab component is on surface where first aperture
Orthographic projection is in contact with first verge of opening.
14. a kind of lithium battery, including the battery core as described in any one of claim 1~13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820516908.1U CN208352449U (en) | 2018-04-12 | 2018-04-12 | A kind of battery core and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820516908.1U CN208352449U (en) | 2018-04-12 | 2018-04-12 | A kind of battery core and lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN208352449U true CN208352449U (en) | 2019-01-08 |
Family
ID=64886334
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| CN201820516908.1U Active CN208352449U (en) | 2018-04-12 | 2018-04-12 | A kind of battery core and lithium battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751091A (en) * | 2021-01-15 | 2021-05-04 | 刘庆娟 | Preparation method of cylindrical lithium battery with high production efficiency |
| CN112968233A (en) * | 2021-01-29 | 2021-06-15 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113078283A (en) * | 2021-03-24 | 2021-07-06 | 宁德新能源科技有限公司 | Battery cell, battery using battery cell and electric equipment |
| CN113451631A (en) * | 2020-03-27 | 2021-09-28 | 宁德新能源科技有限公司 | Battery structure and electronic device using same |
| CN114520374A (en) * | 2022-01-27 | 2022-05-20 | 宁德新能源科技有限公司 | Battery and electronic device thereof |
| WO2022141339A1 (en) * | 2020-12-31 | 2022-07-07 | 宁德新能源科技有限公司 | Battery cell, and electronic device using battery cell |
| WO2023123410A1 (en) * | 2021-12-31 | 2023-07-06 | 东莞新能源科技有限公司 | Battery cell, battery, and electrical device |
-
2018
- 2018-04-12 CN CN201820516908.1U patent/CN208352449U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113451631A (en) * | 2020-03-27 | 2021-09-28 | 宁德新能源科技有限公司 | Battery structure and electronic device using same |
| WO2022141339A1 (en) * | 2020-12-31 | 2022-07-07 | 宁德新能源科技有限公司 | Battery cell, and electronic device using battery cell |
| CN112751091A (en) * | 2021-01-15 | 2021-05-04 | 刘庆娟 | Preparation method of cylindrical lithium battery with high production efficiency |
| CN112968233A (en) * | 2021-01-29 | 2021-06-15 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113078283A (en) * | 2021-03-24 | 2021-07-06 | 宁德新能源科技有限公司 | Battery cell, battery using battery cell and electric equipment |
| WO2023123410A1 (en) * | 2021-12-31 | 2023-07-06 | 东莞新能源科技有限公司 | Battery cell, battery, and electrical 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 |
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