CN108232279A - Unilateral kneading type core, component, lithium battery and the preparation method of a kind of lithium battery - Google Patents
Unilateral kneading type core, component, lithium battery and the preparation method of a kind of lithium battery Download PDFInfo
- Publication number
- CN108232279A CN108232279A CN201810070982.XA CN201810070982A CN108232279A CN 108232279 A CN108232279 A CN 108232279A CN 201810070982 A CN201810070982 A CN 201810070982A CN 108232279 A CN108232279 A CN 108232279A
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- China
- Prior art keywords
- core
- wall
- unilateral
- lithium battery
- kneading type
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- 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
Abstract
The present invention provides a kind of unilateral kneading type core of lithium battery, including core, cavity is formed at the innermost layer of core, forms outer wall at the outermost layer of core, the both ends in the axial direction of core are respectively formed positive terminal and negative pole end；At positive terminal, at least two inner walls of cavity are respectively fixedly connected with to outer wall, and the wherein at least junction of an inner wall and outer wall forms the connecting portion with bus-bar；At negative pole end, at least two inner walls are equally respectively fixedly connected with to outer wall.The present invention also provides unilateral kneading type core component, lithium battery and the preparation methods of kind of lithium battery.The present invention can reduce the security risk because short-circuit caused by lug pulling force is excessive compared to the prior art, while conducive to the integral heat sink of battery.
Description
Technical field
The present invention relates to a kind of lithium battery coiling core, in particular to unilateral kneading type core, the group of a kind of lithium battery
Part, lithium battery and preparation method.
Background technology
In current battery assembling, particularly in the assembling of lithium battery, after all assemblings are completed, for core with converging
The connection of row is flowed, is completed using bilateral super Welding.
The core structure formed using bilateral super Welding, as shown in Figure 1 to Figure 2, due to the upper strata lug 51 of core 5
The outmost turns of (the side lug far from bus-bar) and lower floor's lug 52 (close to the side lug of bus-bar) are welded to bus-bar 6
In larger distance, and the upper strata lug 51 and lower floor's lug 52 is pinched is combined in face, in the charge and discharge process of battery, with negative
The expansion of pole piece, the pole piece of core outer ring can be by very big pulling force, and in the positive terminal of core 5, aluminium foil is through diaphragm to cathode
Cross section generates very big pressure, and in the negative pole end of core, cathode dressing area generates positive plate cross section through diaphragm very big
Pressure, thus when diaphragm intensity is insufficient or when pole piece cross section not smooth enough (jagged), diaphragm is easy to be cut
It is broken, positive/negative plate overlap joint short circuit is caused, so as to increase the security risk of battery.
It is as shown in Figure 1 to Figure 2, kneaded together by super weldering among core 5 meanwhile using the core of bilateral super Welding,
Heat in battery charge and discharge process among core 5 is not easy to discharge.
Invention content
In consideration of it, the present invention provides a kind of cell safety risk that can be effectively reduced caused by short circuit and conducive to heat
Measure unilateral kneading type core, component, lithium battery and the preparation method of the lithium battery of discharge.
On the one hand, the present invention provides a kind of unilateral kneading type core of lithium battery, including core, the innermost layer of core
Place forms cavity, forms outer wall at the outermost layer of core, and the both ends in the axial direction of core are respectively formed positive terminal and negative pole end；
At positive terminal, at least two inner walls of cavity are respectively fixedly connected with to outer wall, a wherein at least inner wall and outer wall
Junction forms the connecting portion with bus-bar；
At negative pole end, at least two inner walls are equally respectively fixedly connected with to outer wall.
Further, respectively at positive terminal and at negative pole end, the first opposite inner wall and the second inner wall difference in cavity
It is fixedly attached to outer wall.
Further, above-mentioned first inner wall or the junction of the second inner wall and outer wall form connecting portion.
Further, above-mentioned connecting portion includes at least two pads.
Further, above-mentioned core is flat-shaped core.
Further, above-mentioned core is section is oval or the core of kidney ellipsoid.
Further, above-mentioned core is cylindric core.
On the other hand, the present invention provides a kind of unilateral kneading type core component of lithium battery, including bus-bar, as above
A kind of unilateral kneading type core of lithium battery is soldered to bus-bar by connecting portion.
In another aspect, the present invention provides a kind of lithium battery, including housing, one kind as described above is provided in housing
The unilateral kneading type core component of lithium battery.
In another aspect, a kind of preparation method of the unilateral kneading type core the present invention provides lithium battery, including：
1) prepare core so that cavity is formed at the innermost layer of core so that outer wall is formed at the outermost layer of core so that
Both ends in the axial direction of core are respectively formed positive terminal and negative pole end；
2) at the positive terminal of core, at least two inner walls of cavity are fixedly attached to by way of kneading respectively outer
Wall, the wherein at least junction of an inner wall and outer wall form the connecting portion with bus-bar；
Meanwhile at negative pole end, at least two inner walls are equally fixedly attached to outer wall by way of kneading respectively.
Unilateral kneading type core, component, lithium battery and the preparation method of a kind of lithium battery provided by the present invention, are compared
It is had the following advantages in the prior art：
1) using the core (unilateral super Welding is realized between core and bus-bar) of unilateral kneading form so that core
Upper strata lug completely not by pulling force, while lower floor's lug is because thickness only has the one of the thickness of original bilateral kneading core
Half, thus after lower floor's tab welding to bus-bar, the pulling force that lug both sides are subject to will reduce, so as to reduce because of lug pulling force
The security risk of short circuit caused by excessive；
2) using unilateral super Welding core after, due on the outside of core lug (i.e. upper strata lug) in free shape
State, thus have enough space discharge heats between upper and lower layer lug, conducive to the integral heat sink of battery.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this field
Technical staff will become clear.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 be in the prior art the anode end face of the core of bilateral kneading structure diagram (structure of cathode end face and
Anode end surface symmetric)；
Fig. 2 is the core of bilateral kneading and the attachment structure schematic diagram of bus-bar in the prior art；
Fig. 3 is a kind of stereogram of the unilateral kneading type core of lithium battery provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of the unilateral kneading type core of lithium battery provided in an embodiment of the present invention before kneading
Figure；
Fig. 5 is a kind of structural representation of the anode end face of the unilateral kneading type core of lithium battery provided in an embodiment of the present invention
Scheme (structure of cathode end face and anode end surface symmetric)；
Fig. 6 is a kind of structure diagram of the unilateral kneading type core component of lithium battery provided in an embodiment of the present invention.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
Embodiment one：
Referring to Fig. 3 to Fig. 6, a kind of unilateral kneading type volume for lithium battery that the embodiment of the present invention one provides is shown in figure
Core including core 1, forms cavity 11, outer wall 12, the axis of core 1 is formed at the outermost layer of core 1 at the innermost layer of core 1
Upward both ends are respectively formed positive terminal 2 and negative pole end 3.Wherein, core 1 is section in the flat-shaped core of kidney ellipsoid.
At positive terminal 2, the first opposite inner wall 14 and the second inner wall 15 are respectively fixedly connected with to outer wall 12 in cavity 11,
The junction of wherein the first inner wall 14 and outer wall 12 forms the connecting portion 13 with bus-bar 4；Wherein, when change turn direction when, also may be used
To be that the junction of the second inner wall 15 and outer wall 12 forms connecting portion 13 with bus-bar 4；At negative pole end 3, structure and anode
End 2 is consistent.
Referring to Fig. 5, a kind of unilateral kneading type core component for lithium battery that the embodiment of the present invention one provides is shown in figure,
It includes bus-bar 4, and a kind of unilateral kneading type core of above-mentioned lithium battery is soldered to bus-bar 4 by connecting portion 13, generally
Can two symmetrical core be set in the both sides of bus-bar.
Again wherein, for the ease of realizing welding manner, connecting portion 13 can be specially multiple pads 131, the present embodiment
In be preferably provided with two pads 131.
The present embodiment one additionally provides a kind of lithium battery (not shown) simultaneously, including housing, is provided in housing above-mentioned
A kind of lithium battery unilateral kneading type core component.
With continued reference to Fig. 3 to Fig. 6, a kind of preparation method of the unilateral kneading type core of lithium battery of the present embodiment one includes
Following steps：
Step 1:Prepare core 1 so that cavity 11 is formed at the innermost layer of core 1 so that formed at the outermost layer of core 1
Outer wall 12 so that the both ends in the axial direction of core 1 are respectively formed positive terminal 2 and negative pole end 3；
Step 2:It is at the positive terminal 2 of core 1, the first inner wall 14 and the second inner wall 15 opposite in cavity 11 is solid respectively
Surely outer wall 12 is connected to, wherein the junction of the first inner wall 14 and outer wall 12 forms the connecting portion 13 with bus-bar 4；In core 1
Negative pole end 3 at, form identical structure in the same fashion.
Embodiment two：
Other are identical with content described in embodiment one, and the difference lies in can also be as needed selectively by first
Other inner walls except inner wall 14, the second inner wall 15 are connected on outer wall 12 with mediating.
Embodiment three：
Other are identical with content described in embodiment one, and the difference lies in can directly apply above structure and method
In oval flat-shaped core of cylindric core or section etc..
To sum up, a kind of unilateral kneading type core for lithium battery that specific embodiments of the present invention are provided, component, lithium battery
And preparation method, it is had the following advantages compared to the prior art：
1) using the core (unilateral super Welding is realized between core and bus-bar) of unilateral kneading form so that core
Upper strata lug completely not by pulling force, while lower floor's lug is because thickness only has the one of the thickness of original bilateral kneading core
Half, thus after lower floor's tab welding to bus-bar, the pulling force that lug both sides are subject to will reduce, so as to reduce because of lug pulling force
The security risk of short circuit caused by excessive；
2) using unilateral super Welding core after, due on the outside of core lug (i.e. upper strata lug) in free shape
State, thus have enough space discharge heats between upper and lower layer lug, conducive to the integral heat sink of battery.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. the unilateral kneading type core of a kind of lithium battery, which is characterized in that including core (1), at the innermost layer of the core (1)
Cavity (11) is formed, forms outer wall (12) at the outermost layer of the core (1), the both ends difference in the axial direction of the core (1)
Form positive terminal (2) and negative pole end (3)；
At the positive terminal (2), at least two inner walls of the cavity (11) are respectively fixedly connected with to the outer wall (12), wherein
The junction of at least one inner wall and the outer wall (12) forms the connecting portion (13) with bus-bar (4)；
At the negative pole end (3), at least two inner walls are equally respectively fixedly connected with to the outer wall (12).
2. the unilateral kneading type core of a kind of lithium battery according to claim 1, which is characterized in that respectively in the anode
It holds at (2) and at the negative pole end (3), opposite the first inner wall (14) and the second inner wall (15) are solid respectively in the cavity (11)
Surely it is connected to the outer wall (12).
A kind of 3. unilateral kneading type core of lithium battery according to claim 2, which is characterized in that first inner wall
(14) or the junction of second inner wall (15) and the outer wall (12) forms the connecting portion (13).
A kind of 4. unilateral kneading type core of lithium battery according to claim 1 or 3, which is characterized in that the connecting portion
(13) including at least two pads (131).
5. according to a kind of unilateral kneading type core of any lithium batteries of claim 1-3, which is characterized in that the core
(1) it is flat-shaped core.
6. the unilateral kneading type core of a kind of lithium battery according to claim 5, which is characterized in that the core (1) is
Section is oval or the core of kidney ellipsoid.
7. according to a kind of unilateral kneading type core of any lithium batteries of claim 1-3, which is characterized in that the core
(1) it is cylindric core.
8. the unilateral kneading type core component of a kind of lithium battery, which is characterized in that appoint including bus-bar (4), such as claim 1-7
A kind of unilateral kneading type core of lithium battery described in one is soldered to the bus-bar (4) by the connecting portion (13).
9. a kind of lithium battery, which is characterized in that including housing, a kind of lithium as claimed in claim 8 is provided in the housing
The unilateral kneading type core component of battery.
10. a kind of preparation method of the unilateral kneading type core of lithium battery as described in claim 1-7 is any, feature exist
In, including：
1) prepare core (1) so that at the innermost layer of the core (1) formed cavity (11) so that the core (1) it is outermost
Outer wall (12) is formed at layer so that the both ends in the axial direction of the core (1) are respectively formed positive terminal (2) and negative pole end (3)；
2) at the positive terminal (2) of the core (1), by least two inner walls of the cavity (11) respectively by way of kneading
It is fixedly attached to the outer wall (12), junction formation and bus-bar of wherein at least one inner wall with the outer wall (12)
(4) connecting portion (13)；
Meanwhile at the negative pole end (3), at least two inner walls are equally fixedly attached to described by way of kneading respectively
Outer wall (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070982.XA CN108232279A (en) | 2018-01-25 | 2018-01-25 | Unilateral kneading type core, component, lithium battery and the preparation method of a kind of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810070982.XA CN108232279A (en) | 2018-01-25 | 2018-01-25 | Unilateral kneading type core, component, lithium battery and the preparation method of a kind of lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN108232279A true CN108232279A (en) | 2018-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810070982.XA Pending CN108232279A (en) | 2018-01-25 | 2018-01-25 | Unilateral kneading type core, component, lithium battery and the preparation method of a kind of lithium battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244526A (en) * | 2018-11-14 | 2019-01-18 | 江苏万达新能源科技股份有限公司 | A kind of novel battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002270148A (en) * | 2001-03-13 | 2002-09-20 | Shin Kobe Electric Mach Co Ltd | Manufacturing method of cylinder sealing type lithium secondary battery and lithium secondary battery |
| JP2003007346A (en) * | 2001-06-19 | 2003-01-10 | Ngk Insulators Ltd | Secondary lithium battery and manufacturing method of the same |
-
2018
- 2018-01-25 CN CN201810070982.XA patent/CN108232279A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002270148A (en) * | 2001-03-13 | 2002-09-20 | Shin Kobe Electric Mach Co Ltd | Manufacturing method of cylinder sealing type lithium secondary battery and lithium secondary battery |
| JP2003007346A (en) * | 2001-06-19 | 2003-01-10 | Ngk Insulators Ltd | Secondary lithium battery and manufacturing method of the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244526A (en) * | 2018-11-14 | 2019-01-18 | 江苏万达新能源科技股份有限公司 | A kind of novel battery |
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