CN207282616U - A kind of electrodes of lithium-ion batteries structure - Google Patents
A kind of electrodes of lithium-ion batteries structure Download PDFInfo
- Publication number
- CN207282616U CN207282616U CN201720907854.7U CN201720907854U CN207282616U CN 207282616 U CN207282616 U CN 207282616U CN 201720907854 U CN201720907854 U CN 201720907854U CN 207282616 U CN207282616 U CN 207282616U
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- China
- Prior art keywords
- lithium
- conductive substrate
- pole piece
- electrodes
- ion batteries
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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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Abstract
The utility model belongs to technical field of lithium ion, a kind of more particularly to electrodes of lithium-ion batteries structure, including conductive substrate and coated in the active material coating in conductive substrate at least one side, and the gap digit of uncoated active material coating is left in the middle part of conductive substrate, the lug position of uncoated active material coating is respectively kept with the both sides of conductive substrate.Compared with the prior art, on the one hand, the utility model is by the middle part preset clearance position of conductive substrate, to discharge the extension stress of pole piece roll-in generation, avoids the occurrence of pole piece both sides and tilts or the phenomenon of pole piece fracture；On the other hand, the utility model in the both sides of conductive substrate by reserving lug position, thus it is possible to vary goes out the direction of lug, so that the problem of improving serious finished product battery core head analysis lithium and poor circulation.
Description
Technical field
The utility model belongs to technical field of lithium ion, more particularly to a kind of electrodes of lithium-ion batteries structure.
Background technology
With the fast development of new energy electric motor vehicle, particularly lithium battery and hybrid-power battery are in electric bicycle and electricity
The application of electrical automobile etc., the security of battery, cycle performance etc. increasingly become the bottleneck of new-energy automobile development.
In the manufacture craft of power battery, mainly there are laminated batteries and winding battery.Laminated batteries have and compare compared with winding battery
Good long circulating performance and high rate charge-discharge performance.Wherein, existing laminated batteries, the lug cross cutting mode of its pole piece have two
Kind, one kind is that lug goes out from centre, but there are the defects of efficiency is low, head membrane density is excessive or too small for the cross cutting mode；Separately
One kind is that lug goes out from both sides, and the cross cutting mode is efficient, diaphragm even density, but carries out roll operation after continuous coating
When, stress can not discharge in time, and pole piece both sides easily tilt, so that the problems such as causing pole piece to be broken, it is follow-up further
Causing finished product battery core head to analyse, lithium is serious, and cycle performance is deteriorated, and influences battery core quality and service life.
In view of this, it is necessory to be improved existing pole piece structure is further, to solve pole piece due to applicator roll
Stress, which can not discharge, after pressure causes pole piece both sides to tilt, pole piece fracture, finished product battery core head analysis lithium are serious and poor circulation etc.
Problem.
Utility model content
The purpose of this utility model is that：In view of the deficiencies of the prior art, a kind of electrodes of lithium-ion batteries structure is provided,
With solve existing pole piece due to coating roll-in after stress can not discharge cause pole piece both sides tilt, pole piece fracture, finished product battery core head
Analyse the problem of serious lithium and poor circulation in portion.
To achieve the above object, the utility model adopts the following technical solution：
A kind of electrodes of lithium-ion batteries structure, including conductive substrate and coated in the active material in conductive substrate at least one side
Expect coating, the gap digit of uncoated active material coating is left in the middle part of conductive substrate, is stayed respectively in the both sides of conductive substrate
There is the lug position of uncoated active material coating.
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, the width of the gap digit for 5 ~
15mm.If reserved gap digit is too small, the stress after roll-in inside pole piece can not obtain timely, abundant release, can produce pole piece
Raw crackle；If reserved gap digit is excessive, the coated area of active material coating can be accordingly reduced, so as to reduce the ratio energy of pole piece
Amount.
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, the width of the gap digit for 8 ~
12mm。
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, the width of the lug position for 5 ~
20mm.If reserved lug position is too small, be unfavorable for the cross cutting of follow-up lug, and the stress of pole piece both sides can not obtain in time, fill
Divide release, can tilt the both sides of pole piece, and finished product battery core head analysis lithium can be made serious；If reserved lug position is excessive,
The coated area of active material coating can be accordingly reduced, so as to reduce the ratio energy of pole piece.
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, and the width of the lug position is 10
~15mm。
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, the face of the active material coating
Product is the 85 ~ 95% of the conductive substrate area.If the coated area of active material coating is excessive, pole piece can be caused in roll-in
Generation is tilted or cracked；If the coated area of active material coating is too low, the ratio energy of pole piece can be reduced.
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, and the quantity of the gap digit is set
For at least two, it can so make the stress release after pole piece roll-in more uniform, the uniformity of very high pole piece.
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, the gap digit and the lug
It is interconnected between position, can so makes the stress release of pole piece entirety more uniform, further improve the uniformity of pole piece.
One kind as electrodes of lithium-ion batteries structure described in the utility model is improved, the gap digit and the lug
The shape of position is square.
The beneficial effects of the utility model are：A kind of electrodes of lithium-ion batteries structure of the utility model, including conductive base
Piece and coated in the active material coating in conductive substrate at least one side, and uncoated active material is left in the middle part of conductive substrate
Expect the gap digit of coating, the lug position of uncoated active material coating is respectively kept with the both sides of conductive substrate.Compared to existing
Technology, on the one hand, the utility model is by the middle part preset clearance position of conductive substrate, to discharge the extension of pole piece roll-in generation
Stress, avoids the occurrence of the phenomenon that pole piece both sides tilt or pole piece is broken；On the other hand, the utility model passes through in conductive substrate
Reserve lug position in both sides, thus it is possible to vary go out the direction of lug, finished product battery core head analysis lithium is serious and poor circulation so as to improve
The problem of.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model.
In figure：1- conductive substrates；2- active material coatings；3- gap digits；4- lugs position.
Embodiment
With reference to embodiment and Figure of description, the utility model is described in further detail, but this
The embodiment not limited to this of utility model.
As shown in Figure 1, a kind of electrodes of lithium-ion batteries structure, including conductive substrate 1 and coated in conductive substrate 1 at least one
Active material coating 2 on face, the gap digit 3 of uncoated active material coating 2 is left at the middle part of conductive substrate 1, in conduction
The both sides of substrate 1 are respectively kept with the shape side of being of the lug position 4 of uncoated active material coating 2, gap digit 3 and lug position 4
Shape, and 85 ~ 95% that the coated area of active material coating 2 is 1 area of conductive substrate.
Wherein, conductive substrate 1 can be copper foil or aluminium foil, and active material coating 2 can be negative active core-shell material coating 2
Or positive electrode active materials coating 2.Compared with the prior art, on the one hand, the utility model at the middle part of conductive substrate 1 by reserving
Gap digit 3, to discharge the extension stress of pole piece roll-in generation, avoids the occurrence of the phenomenon that pole piece both sides tilt or pole piece is broken；Separately
On the one hand, the utility model in the both sides of conductive substrate 1 by reserving lug position 4, thus it is possible to vary goes out the direction of lug, so as to change
Analyse the problem of serious lithium and poor circulation in kind finished product battery core head.
In an embodiment of electrodes of lithium-ion batteries structure according to the present utility model, the width of gap digit 3 for 5 ~
15mm, is preferably 8 ~ 12 mm.If reserved gap digit 3 is too small, the stress after roll-in inside pole piece can not obtain timely, abundant
Release, can crack pole piece；If reserved gap digit 3 is excessive, the coated area of active material coating 2 can be accordingly reduced,
So as to reduce the ratio energy of pole piece.
In an embodiment of electrodes of lithium-ion batteries structure according to the present utility model, the width of lug position 4 for 5 ~
20mm, is preferably 10 ~ 15mm.If reserved lug position 4 is too small, it is unfavorable for the cross cutting of follow-up lug, and the stress of pole piece both sides
Timely, abundant release can not be obtained, can tilt the both sides of pole piece, and finished product battery core head analysis lithium can be made serious；It is if pre-
The lug position 4 stayed is excessive, the coated area of active material coating 2 can be accordingly reduced, so as to reduce the ratio energy of pole piece.
In an embodiment of electrodes of lithium-ion batteries structure according to the present utility model, the quantity of gap digit 3 is arranged to
At least two, and be uniformly distributed on conductive substrate 1, it can so make the stress release after pole piece roll-in more uniform, it is very high
The uniformity of pole piece.
In an embodiment of electrodes of lithium-ion batteries structure according to the present utility model, between gap digit 3 and lug position 4
It is interconnected, can so makes the stress release of pole piece entirety more uniform, further improve the uniformity of pole piece.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
Apply mode make a change and modification.Therefore, the utility model is not limited to above-mentioned embodiment, every this area skill
It is new that art personnel any conspicuously improved, replacement or modification made on the basis of the utility model belong to this practicality
The protection domain of type.In addition, although used some specific terms in this specification, but these terms are intended merely to conveniently say
It is bright, any restrictions are not formed to the utility model.
Claims (9)
1. a kind of electrodes of lithium-ion batteries structure, including conductive substrate and coated in the active material in conductive substrate at least one side
Coating, it is characterised in that：The gap digit of uncoated active material coating is left in the middle part of conductive substrate, the two of conductive substrate
Side is respectively kept with the lug position of uncoated active material coating.
2. electrodes of lithium-ion batteries structure according to claim 1, it is characterised in that：The width of the gap digit for 5 ~
15mm。
3. electrodes of lithium-ion batteries structure according to claim 2, it is characterised in that：The width of the gap digit for 8 ~
12mm。
4. electrodes of lithium-ion batteries structure according to claim 1, it is characterised in that：The width of the lug position for 5 ~
20mm。
5. electrodes of lithium-ion batteries structure according to claim 4, it is characterised in that：The width of the lug position for 10 ~
15mm。
6. electrodes of lithium-ion batteries structure according to claim 1, it is characterised in that：The area of the active material coating
For the 85 ~ 95% of the conductive substrate area.
7. electrodes of lithium-ion batteries structure according to claim 1, it is characterised in that：The quantity of the gap digit is arranged to
At least two.
8. electrodes of lithium-ion batteries structure according to claim 1, it is characterised in that：The gap digit and the lug position
Between be interconnected.
9. electrodes of lithium-ion batteries structure according to claim 1, it is characterised in that：The gap digit and the lug position
Shape be square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720907854.7U CN207282616U (en) | 2017-07-25 | 2017-07-25 | A kind of electrodes of lithium-ion batteries structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720907854.7U CN207282616U (en) | 2017-07-25 | 2017-07-25 | A kind of electrodes of lithium-ion batteries structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207282616U true CN207282616U (en) | 2018-04-27 |
Family
ID=61985493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720907854.7U Expired - Fee Related CN207282616U (en) | 2017-07-25 | 2017-07-25 | A kind of electrodes of lithium-ion batteries structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207282616U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114270622A (en) * | 2021-01-29 | 2022-04-01 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
| CN114284464A (en) * | 2021-11-23 | 2022-04-05 | 上海兰钧新能源科技有限公司 | Lithium ion battery positive pole piece and gap coating method thereof |
-
2017
- 2017-07-25 CN CN201720907854.7U patent/CN207282616U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114270622A (en) * | 2021-01-29 | 2022-04-01 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
| CN114284464A (en) * | 2021-11-23 | 2022-04-05 | 上海兰钧新能源科技有限公司 | Lithium ion battery positive pole piece and gap coating method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180427 Termination date: 20190725 |