CN208970673U - Lithium ion battery and its core - Google Patents
Lithium ion battery and its core Download PDFInfo
- Publication number
- CN208970673U CN208970673U CN201821432862.1U CN201821432862U CN208970673U CN 208970673 U CN208970673 U CN 208970673U CN 201821432862 U CN201821432862 U CN 201821432862U CN 208970673 U CN208970673 U CN 208970673U
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- Prior art keywords
- negative electrode
- positive plate
- anode ear
- electrode lug
- core
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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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Abstract
The utility model relates to battery technology fields, a kind of lithium ion battery and its core are provided, core is wound together by positive plate, negative electrode tab and diaphragm and is formed, positive plate is equipped with anode ear, the one end of negative electrode tab is equipped with negative electrode lug, it is reference with core cross-section center, anode ear, negative electrode lug and positive plate ending are in the cross circular section circumferential direction and submit wrong setting, and the angular range at anode ear, negative electrode lug and positive plate ending between any two is 100 ° -140 °.In the utility model, angle between anode ear, negative electrode lug and positive plate ending is designed between 100 ° -140 °, in this way, in circumferencial direction, three is staggered certain angle, it is not overlapped between any two, core circularity is good when pole piece coiling, in this way, after placing shell, stress equalization at anode ear, negative electrode lug and positive plate ending improves the service life and security performance of lithium ion battery to mitigate the destruction to positive collector, negative collector.
Description
Technical field
The utility model relates to battery technology fields, especially provide a kind of lithium ion battery and its core.
Background technique
Core in existing lithium ion battery, anode ear generally use aluminium pole ears (or other metal or alloy), anode collection
Fluid is aluminium foil；Negative electrode lug uses nickel tab (or other metal or alloy), and negative current collector is copper foil.Utilize the method for welding
Tab connection on a current collector, then will be welded with pole piece (the active material of tab by (super weldering, rivet welding etc.) by rolling step again
Material coating is on a current collector) winding forms the core of cylindrical body, after the completion anode ear, negative electrode lug, at positive plate ending it
Between position be random.Since at anode ear 10 ', negative electrode lug 20 ' and positive plate ending 30 ' thickness is compared with other regions
Thickness, if three has more overlapping region after winding, as shown in Figure 1, in this way, will lead to that 1 ' section of core is non-round, and core is put
After entering shell, anode ear, negative electrode lug discontinuity equalization, unbalanced stress can generate destruction to affluxion body in lithium ion batteries, sternly
Part or complete rupture occur for the collector that will lead to tab edge of weight, to make battery failure, or even cause serious peace
Full accident.Though the special connecting portions of core such as pole piece adhesive tape in rectangular cell, anode ear and ending adhesive tape exist in the prior art
Nonoverlapping method is to reduce core thickness, but due to not having using accurate arrangement, so still having to battery performance
It influences, is unfavorable for meeting to the increasing requirement of battery performance, it is therefore necessary to which providing a kind of can accurately guarantee core thickness
Uniform structure.
Utility model content
The purpose of this utility model is to provide a kind of lithium ion batteries, it is intended to solve lithium ion battery in the prior art and exist
The technology for leading to inside battery discontinuity equalization and making battery failure is stacked after winding at anode ear, negative electrode lug and positive plate ending
Problem.
A kind of core that in order to achieve the above purposes, the technical solution adopted by the utility model is:, by positive plate, negative electrode tab with
And be stacked and placed on the positive plate and wind to be formed together with the diaphragm between the negative electrode tab, the positive plate is equipped with anode ear,
The one end of the negative electrode tab is equipped with negative electrode lug, is reference, the anode ear, the negative electrode lug with the core cross-section center
And positive plate ending is in the cross circular section circumferential direction and submits wrong setting, the anode ear, the negative electrode lug and described
Angular range at positive plate ending between any two is 100 ° -140 °.
Further, the angular range at the anode ear, the negative electrode lug and the positive plate ending between any two
It is 110 ° -130 °.
Further, the angular range at the anode ear, the negative electrode lug and the positive plate ending between any two
It is 120 °.
Further, the anode ear is externally provided with high temperature protection glue.
Further, the distance of the anode ear to the cross-section center, which is less than at the positive plate ending, arrives the cross
The distance of kernel of section is less than the negative electrode lug to described transversal to the distance of the cross-section center at the positive plate ending
The distance at face center.
The utility model additionally provides a kind of lithium ion battery, including shell and the core being disposed in the housing, institute
Core is stated by positive plate, negative electrode tab and is stacked and placed on the positive plate and is wound together with the diaphragm between the negative electrode tab and formed,
The positive plate is equipped with anode ear, and it is ginseng with the core cross-section center that the one end of the negative electrode tab, which is equipped with negative electrode lug,
Examine, the anode ear, the negative electrode lug and positive plate ending are in the cross circular section circumferential direction and submit wrong setting, it is described just
Angular range at tab, the negative electrode lug and the positive plate ending between any two is 100 ° -140 °.
Further, the angular range at the anode ear, the negative electrode lug and the positive plate ending between any two
It is 110 ° -130 °.
Further, the angle at the anode ear, the negative electrode lug and the positive plate ending between any two is
120°。
Further, the anode ear is externally provided with high temperature protection glue.
Further, the distance of the anode ear to the cross-section center, which is less than at the positive plate ending, arrives the cross
The distance of kernel of section is less than the negative electrode lug to described transversal to the distance of the cross-section center at the positive plate ending
The distance at face center.
The utility model has the beneficial effects that
In the utility model, by anode ear, negative electrode lug and positive plate ending between angle design 100 °-
Between 140 °, in this way, in circumferencial direction, three is staggered certain angle, is not overlapped between any two, core circularity when pole piece coiling
It is good, in this way, after placing shell, stress equalization at anode ear, negative electrode lug and positive plate ending, to mitigate to positive afflux
The destruction of body, negative collector improves the service life and security performance of lithium ion battery；Meanwhile lithium ion battery is at work,
In charge and discharge process, lithium ion is spread back and forth between anode, cathode, and positive plate, negative electrode tab shrink, expand, while by
Stress is generated in the constraint inside battery of shell, stress ceaselessly squeezes tab and collector, to generate tab/anode ending
To the shearing force of collector, and in the entire life cycle of battery, the shearing force can be always existed, which can not keep away
Exempt from.Angle design between anode ear, negative electrode lug and positive plate finish up in above-mentioned angular range, improves the circle of core
Degree, it is evenly dispersed act at anode ear, the stress at negative electrode lug, at positive ending, reduce the risk of core failure, improve
The service life of lithium ion battery.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that core in the prior art provided by the embodiment of the utility model winds schematic diagram；
Fig. 2 is the schematic diagram before the pole piece coiling of lithium ion battery provided by the embodiment of the utility model；
Fig. 3 is the cross-sectional view of lithium ion battery provided by the embodiment of the utility model；
Fig. 4 is anode ear, negative electrode lug and positive plate ending in lithium ion battery provided by the embodiment of the utility model
Locate relative position schematic diagram；
Fig. 5 is anode ear position view in positive plate in lithium ion battery provided by the embodiment of the utility model；
Wherein, each appended drawing reference in figure:
1 '-core；10 '-anode ears；20 '-negative electrode lugs；At 30 '-positive plate endings；10- shell；20- core；21- is just
Pole piece；The positive collector of 211-；212- anode material；213- anode ear；At 214- positive plate ending；215- high temperature protection glue；22- is negative
Pole piece；The negative collector of 221-；222- cathode material；223- negative electrode lug；23- diaphragm.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, it should be understood that term " length ", " width ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached
Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of utility model.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Please refer to Fig. 2, Fig. 3, the utility model provides a kind of lithium ion battery, including shell 10 and is set to shell 10
Interior core 20, core 20 are by positive plate 21, negative electrode tab 22 and the diaphragm being stacked and placed between positive plate 21 and negative electrode tab 22
23 wind the cylindrical-shaped structure of formation together.Wherein, shell 10 is steel shell, is hollow cylindrical-shaped structure, for placing core
20.For positive plate 21 including positive collector 211 and coated on the anode material 212 on positive collector 211, negative electrode tab 22 includes negative
Collector 221 and coated on the cathode material 222 on negative collector 221.Positive collector 211 is equipped with anode ear 213, negative afflux
The one end of body 221 be equipped with negative electrode lug 223, with 20 cross-section center O of core be reference, anode ear 213, negative electrode lug 223 and
214 submit wrong setting in cross circular section circumferential direction at positive plate ending, at anode ear 213, negative electrode lug 223 and positive plate ending
214 angle theta range between any two is 100 ° -140 °.
In the utility model, the angle theta between at anode ear 213, negative electrode lug 223 and positive plate ending 214 is designed
Between 100 ° -140 °, in this way, in circumferencial direction, three is staggered certain angle, is not overlapped between any two, when pole piece coiling
20 circularity of core is good, in this way, after being placed into shell 10, at anode ear 213, negative electrode lug 223 and positive plate ending 214 by
Power is balanced, to mitigate the destruction to positive collector 211, negative collector 221, improves the service life and safety of lithium ion battery
Performance；At work, in charge and discharge process, lithium ion is spread lithium ion battery back and forth between anode, cathode, positive plate 21,
Negative electrode tab 22 shrinks, expands, while under the constraint of shell 10, inside battery can generate stress, and stress ceaselessly squeezes
Tab and collector, to generate tab/anode ending to the shearing force of collector, and in the entire life cycle of battery
The shearing force can always exist, and the shearing force is inevitable.At anode ear 213, negative electrode lug 223 and positive plate ending
Angle design between 214 improves the circularity of core 20 within the above range, it is evenly dispersed act at anode ear 213,
Stress at negative electrode lug 223, at positive ending.The risk of the failure of core 20 can be effectively reduced in the angle design, improves lithium
The service life of ion battery.
Further, in this embodiment at anode ear 213, negative electrode lug 223 and positive plate ending 214 between any two
Angle theta range is 110 ° -130 °.Within this range, the circularity of core 20 further improves.
Referring to Fig. 4, it is preferable that 214 angle theta between any two at anode ear 213, negative electrode lug 223 and positive plate ending
It is 120 °.It is, when being uniformly distributed between 214 threes at anode ear 213, negative electrode lug 223 and positive plate ending, in battery
Portion's internal stress is minimum to the destructiveness of collector, the longest-lived of battery, and security performance is best.
Referring to Fig. 2, in the present embodiment, after coiling, the distance of anode ear 213 to cross-section center O is less than just core 20
214 distance for arriving cross-section center O at pole piece ending, 214 to cross-section center O distances are less than negative electrode lug at positive plate ending
223 arrive the distance of the cross-section center O.It is on 20 thickness direction of core, anode ear 213 is located at most inner side, positive plate
214 are located at centre at ending, and outermost is negative electrode lug 223.
Meanwhile as shown in figure 5, on the outside of anode ear 213 be equipped with high temperature protection glue 215, by be arranged high temperature protection glue 215,
It avoids anode ear 213 and the contact of diaphragm 23 in winding and so that the metal burr on anode ear 213 is damaged diaphragm 23 and cause short circuit.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of core by positive plate, negative electrode tab and is stacked and placed on the positive plate together with the diaphragm between the negative electrode tab
Winding is formed, and the positive plate is equipped with anode ear, and the one end of the negative electrode tab is equipped with negative electrode lug, it is characterised in that: with institute
Core cross-section center is stated as reference, the anode ear, the negative electrode lug and positive plate ending are in the cross-sectional circumferential
It is staggered on direction, the angular range at the anode ear, the negative electrode lug and the positive plate ending between any two is
100°-140°。
2. core according to claim 1, it is characterised in that: the anode ear, the negative electrode lug and the positive plate
Angular range at ending between any two is 110 ° -130 °.
3. core according to claim 2, it is characterised in that: the anode ear, the negative electrode lug and the positive plate
Angular range at ending between any two is 120 °.
4. core according to claim 1, it is characterised in that: the anode ear is externally provided with high temperature protection glue.
5. core according to any one of claim 1 to 4, it is characterised in that: the anode ear is into the cross section
The distance of the heart is less than the distance that the cross-section center is arrived at the positive plate ending, arrives at the positive plate ending described transversal
The distance at face center is less than the negative electrode lug to the distance of the cross-section center.
6. a kind of lithium ion battery, including shell and the core being disposed in the housing, the core is by positive plate, negative electrode tab
And be stacked and placed on the positive plate and wind to be formed together with the diaphragm between the negative electrode tab, the positive plate is equipped with anode
Ear, the one end of the negative electrode tab are equipped with negative electrode lug, it is characterised in that: with the core cross-section center be reference, it is described just
Tab, the negative electrode lug and positive plate ending are in the cross circular section circumferential direction and submit wrong setting, the anode ear, described
Angular range at negative electrode lug and the positive plate ending between any two is 100 ° -140 °.
7. lithium ion battery according to claim 6, it is characterised in that: the anode ear, the negative electrode lug and described
Angular range at positive plate ending between any two is 110 ° -130 °.
8. lithium ion battery according to claim 7, it is characterised in that: the anode ear, the negative electrode lug and described
Angle at positive plate ending between any two is 120 °.
9. lithium ion battery according to claim 6, it is characterised in that: the anode ear is externally provided with high temperature protection glue.
10. lithium ion battery according to any one of claims 6 to 9, it is characterised in that: the anode ear to the cross
The distance of kernel of section is less than the distance that the cross-section center is arrived at the positive plate ending, arrives institute at the positive plate ending
State distance of the distance less than the negative electrode lug to the cross-section center of cross-section center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821432862.1U CN208970673U (en) | 2018-08-31 | 2018-08-31 | Lithium ion battery and its core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821432862.1U CN208970673U (en) | 2018-08-31 | 2018-08-31 | Lithium ion battery and its core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208970673U true CN208970673U (en) | 2019-06-11 |
Family
ID=66754478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821432862.1U Active CN208970673U (en) | 2018-08-31 | 2018-08-31 | Lithium ion battery and its core |
Country Status (1)
| Country | Link |
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| CN (1) | CN208970673U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518186A (en) * | 2019-09-03 | 2019-11-29 | 江西迪比科股份有限公司 | A kind of Double-pole lug low internal resistance Li-ion secondary cell |
| WO2024007217A1 (en) * | 2022-07-06 | 2024-01-11 | 宁德新能源科技有限公司 | Button cell and electronic device |
| WO2024044973A1 (en) * | 2022-08-30 | 2024-03-07 | 宁德新能源科技有限公司 | Electrochemical device and electric apparatus |
-
2018
- 2018-08-31 CN CN201821432862.1U patent/CN208970673U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518186A (en) * | 2019-09-03 | 2019-11-29 | 江西迪比科股份有限公司 | A kind of Double-pole lug low internal resistance Li-ion secondary cell |
| WO2024007217A1 (en) * | 2022-07-06 | 2024-01-11 | 宁德新能源科技有限公司 | Button cell and electronic device |
| WO2024044973A1 (en) * | 2022-08-30 | 2024-03-07 | 宁德新能源科技有限公司 | Electrochemical device and electric apparatus |
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| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20191022 Granted publication date: 20190611 |
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| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20221022 Granted publication date: 20190611 |
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| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20221022 Granted publication date: 20190611 |