CN209344259U - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
- Publication number
- CN209344259U CN209344259U CN201920098789.7U CN201920098789U CN209344259U CN 209344259 U CN209344259 U CN 209344259U CN 201920098789 U CN201920098789 U CN 201920098789U CN 209344259 U CN209344259 U CN 209344259U
- Authority
- CN
- China
- Prior art keywords
- piece
- roll core
- free
- adhesion
- battery
- Prior art date
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model is suitable for field of batteries, provide a kind of lithium ion battery, including battery roll core and it is pasted onto outermost first adhesive tape of the battery roll core and the second adhesive tape, first adhesive tape includes the first tie point of the first adhesion piece, the first free piece and connection the first adhesion piece and the first free end, and second adhesive tape includes the second tie point of the second adhesion piece, the second free piece and connection the second adhesion piece and the described second free piece；The first adhesion piece and the second adhesion piece respectively with battery roll core outer surface adhesion, first tie point and second tie point are overlapped in the initial state and separate under battery roll core expansion, and the first free piece and the second free piece adhesion and are partially stripped in the initial state in the case where the battery roll core expands.Lithium ion battery provided by the utility model reduces the phenomenon that making battery roll core generate tearing because of internal stress accumulation by the setting of the first adhesive tape and the second adhesive tape.
Description
Technical field
The utility model belongs to field of batteries more particularly to a kind of lithium ion battery.
Background technique
Fig. 1 is please referred to, the battery roll core 10 of lithium ion battery is wound layer by layer by positive plate/diaphragm/negative electrode tab/diaphragm
It is process, is the degree of registration for guaranteeing battery roll core 10 in winding process, need to apply positive plate, negative electrode tab, diaphragm certain
Winding tension, and in winding ending after, 10 outer ring of battery roll core paste one layer of terminal adhesive tape 20, play fixed battery roll core
10, the effect for preventing it from loosely deforming.
After charging, due to the insertion of lithium ion, volume expands negative electrode material lithium ion battery, and negative electrode tab thickness increases
Add.Existing terminal adhesive tape ending method, terminal adhesive tape 20 is to the constraint effect of battery roll core 10 so that negative electrode volume expansion produces
Raw internal stress can not discharge, and this internal stress makes battery roll core 10 while affording radial forces (F0) and circumferential active force
(FI, F2), to make battery roll core 10 by a degree of stretching.During being charged and discharged repeatedly, battery roll core
10, for a long time by stress, easily lead to fracture, seriously affect battery.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of lithium ion battery, purport
Reducing the case where battery roll core is torn by internal stress effect.
The utility model is realized in this way:
A kind of lithium ion battery, including battery roll core and it is pasted onto outermost first adhesive tape of the core and the second glue
Band, the battery roll core include the swelling state in original state and use that manufacture is completed, first adhesive tape or the second glue
Band is covered on the clearing end of the battery roll core, and first adhesive tape includes described in the first adhesion piece, the first free piece and connection
First tie point of the first adhesion piece and the first free end, second adhesive tape include the second adhesion piece, the second free piece and company
Connect the second tie point of the second adhesion piece Yu the described second free piece；
When the battery roll core is in original state, the first adhesion piece and the second adhesion piece respectively with it is described
The adhesion of battery roll core outer surface, the first free piece and the second free piece bonding, first tie point and described the
Two tie points are overlapped, wherein first tie point and second tie point are overlapped contact point as coincidence point；
When the battery roll core is in swelling state, first tie point leaves described heavy with second tie point
Chalaza, the first free piece include that the first removing between first tie point and the coincidence point and is connected to section
First bonding section of the first removing section, the second free piece include be located at second tie point and the coincidence point it
Between second removing section and be connected to it is described second removing section second bonding section, it is described first bonding section and it is described second bonding
Section bonding.
Further, when the battery roll core is in original state, the first free piece and the second free piece
It bends, and is overlayed on the outside of the first adhesion piece or the second adhesion piece at first tie point or the second tie point.
Further, the lithium ion battery is cylindrical lithium ion battery.
Further, the length of the first adhesion piece and the second adhesion piece is in the battery roll core outer perimeter
1/8th arrive in the section of half.
Further, the length of the first adhesion piece and the second adhesion piece is in the battery roll core outer perimeter
1/6th arrive in the section of one third.
Further, the described first free piece and the second free leaf length are all larger than the battery roll core outer perimeter
1/8th arrive in the section of one third.
Further, the described first free piece and the second free leaf length are all larger than the battery roll core outer perimeter
1/8th arrive in the section of a quarter.
Further, the core includes plus plate current-collecting body and negative current collector, and the plus plate current-collecting body is aluminium foil, described
Negative current collector is copper foil.
Lithium ion battery provided by the utility model is cut down by the setting of the first adhesive tape and the second adhesive tape because of battery roll core
The internal stress of expansion and generation, so that avoiding the problem that gathering because of internal stress makes battery roll core generate tearing.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the terminal adhesive tape of existing design and the connection schematic diagram of battery roll core；
Fig. 2 is battery roll core the first adhesive tape and the second adhesive tape connection signal in the initial state in the utility model embodiment
Figure；
Fig. 3 is battery roll core the first adhesive tape and second adhesive tape connection signal in swelling state in the utility model embodiment
Figure；
Fig. 4 is battery roll core and the first adhesive tape and the second adhesive tape assembling schematic diagram in the utility model embodiment.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 10 | Battery roll core | 40 | Second adhesive tape |
| 20 | Terminal adhesive tape | 41 | Second adhesion piece |
| 30 | First adhesive tape | 42 | Second free piece |
| 31 | First adhesion piece | 43 | Second tie point |
| 32 | First free piece | 421 | Second removing section |
| 321 | First removing section | 422 | Second bonding section |
| 322 | First bonding section | 50 | Coincidence point |
| 33 | First tie point |
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the 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.
Referring to figure 2. to Fig. 4, the present embodiment provides a kind of lithium ion battery, including battery roll core 10 and it is pasted onto electricity
Outermost first adhesive tape 30 of pond core 10 and the second adhesive tape 40, battery roll core 10 include the original state and use that manufacture is completed
In swelling state, the first adhesive tape 30 or the second adhesive tape 40 be covered on the clearing end of battery roll core 10, and the first adhesive tape 30 includes the
One adhesion piece 31, the first free piece 32 and the first tie point 33 for connecting the first adhesion piece 31 and the first free end, the second adhesive tape
40 include the second adhesion piece 41, the second free piece 42 and the second tie point for connecting the second adhesion piece 41 and the second free piece 42
43；
When battery roll core 10 is in original state, the first adhesion piece 31 and the second adhesion piece 41 respectively with battery roll core 10
Outer surface adhesion, the first free piece 32 and the second free piece 42 are bonded, and the first tie point 33 and the second tie point 43 are overlapped,
In, the first tie point 33 and the second tie point 43 are overlapped contact point as coincidence point 50；
When battery roll core 10 is in swelling state, the first tie point 33 and the second tie point 43 leave coincidence point 50, the
One free piece 32 includes that the first removing between the first tie point 33 and coincidence point 50 and is connected to the first removing section at section 321
321 the first bonding section 322, the second free piece 42 include the second removing section between the second tie point 43 and coincidence point 50
421 and be connected to the second removing section 421 second bonding section 422, first bonding section 322 and second bonding section 422 be bonded.
In lithium ion battery manufacturing process, the first adhesive tape 30 and the second adhesive tape 40 have one section to be mutually bonded (the first freedom
Piece 32 and the second free piece 42 are mutually bonded), other end is pasted respectively in 10 outermost layer of battery roll core (31 He of the first adhesion piece
Second adhesion piece 41 is adhered to the outer surface of battery roll core 10 respectively), with duplicate charging in lithium ion battery use process
With the process of electric discharge, battery roll core 10 generates expansion, and when expansion, the first adhesion piece 31 and the second adhesion piece 41 are with battery roll core 10
Outer layer movement and separate (referring to figure 3., the first adhesion piece 31 under the action of internal stress F1 to deviate from coincidence point 50 side
To movement, the second adhesion piece 41 is under the action of internal stress F2 to mobile away from the direction of coincidence point 50), the first free 32 He of piece
Second free piece 42 is partially stripped, by means of cutting down the internal stress that generates due to battery roll core 10 expands as a result,.
Lithium ion battery provided in this embodiment is cut down by the setting of the first adhesive tape 30 and the second adhesive tape 40 because of battery winding
The internal stress of the expansion of core 10 and generation, never avoiding the problem that gathering because of internal stress makes battery roll core 10 generate tearing.
The material of the first adhesive tape 30 and the second adhesive tape 40 is common by substrate and adhesive two on the market in the present embodiment
The adhesive tape of part composition.
In this illustrated embodiment, lithium ion battery is cylindrical lithium ion battery.In other embodiments, lithium ion battery
It can be other shapes.
In the present embodiment, plus plate current-collecting body is aluminium foil, and negative current collector is copper foil.
Referring to figure 4., when battery roll core 10 is in original state, the first free piece 32 and the second free piece 42 are first
(i.e. coincidence point 50) is bent at tie point 33 or the second tie point 43, and is overlayed outside the first adhesion piece 31 or the second adhesion piece 41
Side.The design is not so that the setting of the first adhesive tape 30 and the second adhesive tape 40 influences the elasticity that battery roll core 10 enters shell assembly.
Referring to figure 2., 10 outer layer of battery roll core that the first adhesion piece 31 and the second adhesion piece 41 are not overlapped and collectively cover
Surface is less than the whole surface of battery roll core 10, and the internal stress to avoid adhesion region of the large area adhesion under fixed is difficult to clear up
The phenomenon that.Meanwhile first adhesion piece 31 or the second adhesion piece 41 and the area of 10 adhesion of battery roll core it is unsuitable too small to avoid viscous
Property it is insufficient and the phenomenon that cause the first adhesion piece 31 or the second adhesion piece 41 to separate with battery roll core 10.By multiple experiment,
Preferably, the length of the first adhesion piece 31 and the second adhesion piece 41 10 outer perimeter of battery roll core 1 to two/8ths/
In one section.Further preferably, the length of the first adhesion piece 31 and the second adhesion piece 41 is in 10 outer perimeter of battery roll core
1/6th arrive in the section of one third.Experiment shows that in the section, the first adhesion piece 31 and the second adhesion piece 41 can be steady
Admittedly be bonded in the outer surface of battery roll core 10, will not be detached under 10 expansion status of battery roll core, and clear up well
The internal stress of battery roll core 10.In this illustrated embodiment, 41 Length discrepancy of the first adhesion piece 31 and the second adhesion piece.It is covered on battery
The length of first adhesion piece 31 of 10 clearing end of core is longer than the second adhesion piece 41.
Referring to figure 2., the first free piece 32 and the second free piece 42 are isometric.To avoid the extra glue with adhesive
Band is bonded in 10 outer surface of battery roll core or packaging shell inner wall and improves the first free piece 32 and the second free piece 42 separates
Difficulty.
Further, the first free piece 32 and the second free piece 42 to have enough length with ensure battery roll core 10 most
The first free piece 32 and the second free piece 42 are bonded section 322 and second there are still the first of stick to each other and are bonded under big swell increment
Section 422.Meanwhile first free piece 32 and the second free piece 42 length be not easy it is too long, in conjunction with aforementioned, the first free piece 32 and
Two free pieces 42 are stacked on the outside of the first adhesion piece 31 or the second adhesion piece 41, as the first free piece 32 and second is free
The resistance of the increase of 42 length of piece, the first free piece 32 and the second free piece 42 circumferentially moved increases therewith, in some instances it may even be possible to produce
Life is difficult to mobile problem.Therefore, it is necessary to the length to the first free piece 32 and the second free piece 42 to carry out researching and designing.By
It studies, the first free piece 32 and the second free 42 length of piece are all larger than 1/8th of 10 outer perimeter of battery roll core and arrive one third
Section in, can effectively avoid the generation of the above problem.Further preferably, the first free piece 32 and the second free 42 length of piece are equal
1/8th greater than 10 outer perimeter of battery roll core arrive in the section of a quarter.The section considers in assembling process, lithium from
Sub- battery case is to the effect of pressing of the first free piece 32 and the second free piece 42 to the first free piece 32 and the second free piece 42
Mobile influence and other factors can effectively avoid the generation of the above problem.In addition, the first free piece 32, the second free piece 42,
The size design of first adhesive sheet and the second adhesive sheet, is conducive to standardized administration and operation, improves the production effect of lithium ion battery
Rate.
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 modification, equivalent replacement or improvement etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (9)
1. a kind of lithium ion battery, which is characterized in that including battery roll core and be pasted onto the battery roll core outermost
One adhesive tape and the second adhesive tape, the battery roll core include the swelling state in original state and use that manufacture is completed, and described the
One adhesive tape or the second adhesive tape are covered on the clearing end of the battery roll core, first adhesive tape include the first adhesion piece, first from
By the first tie point of piece and connection the first adhesion piece and the first free end, second adhesive tape including the second adhesion piece,
Second tie point of the second free piece and connection the second adhesion piece and the described second free piece；
When the battery roll core is in original state, the first adhesion piece and the second adhesion piece respectively with the battery
The adhesion of core outer surface, the first free piece and the second free piece bonding, first tie point and described second connect
Contact is overlapped, wherein first tie point and second tie point are overlapped contact point as coincidence point；
When the battery roll core is in swelling state, first tie point leaves described be overlapped with second tie point
Point, the first free piece include that the first removing between first tie point and the coincidence point and is connected to institute at section
The first bonding section of the first removing section is stated, the second free piece includes between second tie point and the coincidence point
Second removing section and be connected to it is described second removing section second bonding section, it is described first bonding section and it is described second bonding section
Bonding.
2. lithium ion battery as described in claim 1, which is characterized in that when the battery roll core is in original state, institute
It states the first free piece and the second free piece is bent at first tie point or the second tie point, and overlay described
On the outside of one adhesion piece or the second adhesion piece.
3. lithium ion battery as claimed in claim 2, which is characterized in that the lithium ion battery is cylindrical lithium ion cell
Pond.
4. lithium ion battery as described in claim 1, which is characterized in that the first adhesion piece and the second adhesion piece
Length is in 1/8th section to half of the battery roll core outer perimeter.
5. lithium ion battery as described in claim 1, which is characterized in that the first adhesion piece and the second adhesion piece
Length is in 1/6th section to one third of the battery roll core outer perimeter.
6. lithium ion battery as described in claim 1, which is characterized in that the first free piece and the second free length of a film
It spends equal.
7. lithium ion battery as claimed in claim 6, which is characterized in that the first free piece and the second free length of a film
Degree is all larger than 1/8th of the battery roll core outer perimeter in the section of one third.
8. lithium ion battery as claimed in claim 6, which is characterized in that the first free piece and the second free length of a film
Degree is all larger than 1/8th of the battery roll core outer perimeter in the section of a quarter.
9. lithium ion battery as described in any of the claims 1 to 8, which is characterized in that the battery roll core includes anode collection
Body and negative current collector, the plus plate current-collecting body are aluminium foil, and the negative current collector is copper foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920098789.7U CN209344259U (en) | 2019-01-21 | 2019-01-21 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920098789.7U CN209344259U (en) | 2019-01-21 | 2019-01-21 | Lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209344259U true CN209344259U (en) | 2019-09-03 |
Family
ID=67762065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920098789.7U Active CN209344259U (en) | 2019-01-21 | 2019-01-21 | Lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209344259U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114242937A (en) * | 2021-12-15 | 2022-03-25 | 珠海冠宇电池股份有限公司 | Battery cell and battery |
| WO2022222941A1 (en) * | 2021-04-20 | 2022-10-27 | 珠海冠宇电池股份有限公司 | Battery |
-
2019
- 2019-01-21 CN CN201920098789.7U patent/CN209344259U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222941A1 (en) * | 2021-04-20 | 2022-10-27 | 珠海冠宇电池股份有限公司 | Battery |
| CN114242937A (en) * | 2021-12-15 | 2022-03-25 | 珠海冠宇电池股份有限公司 | Battery cell and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209691795U (en) | A kind of chargeable lithium ion battery with hard shell | |
| CN111668451B (en) | Preparation method of pole piece for winding type multi-pole lug battery cell, pole piece and battery cell | |
| CN109830638B (en) | High-hardness flexible-package lithium ion battery pole piece and roll core preparation method | |
| CN209880750U (en) | Winding type battery cell and lithium ion battery | |
| CN105261781B (en) | Electrochemical cell and preparation method thereof | |
| WO2020007130A1 (en) | Negative electrode plate for lithium battery, and lithium battery | |
| CN110571472B (en) | Electrode core body of flexible battery and preparation method and application thereof | |
| CN209344259U (en) | Lithium ion battery | |
| CN110783638B (en) | Winding stacked battery cell and preparation method thereof | |
| CN113421996B (en) | Negative plate, battery and manufacturing method of negative plate | |
| CN112531142A (en) | Pole piece for soft package button battery, button battery and preparation method of pole piece | |
| CN113193163A (en) | Battery cell and power utilization device | |
| CN111446486A (en) | Flexible battery | |
| CN216563209U (en) | Pole piece, roll core and battery | |
| CN211045637U (en) | Polymer battery cell | |
| CN109193025B (en) | Lithium ion battery with high-safety pole piece and manufacturing method thereof | |
| CN218783051U (en) | Negative plate and battery | |
| CN217588983U (en) | Middle lug-outlet type positive plate, battery cell and battery | |
| CN116315444A (en) | Z-shaped laminated battery diaphragm, battery core and battery | |
| CN106229428B (en) | Battery cathode connection structure and coiled cylindrical battery | |
| CN205564900U (en) | Coiling type battery cell | |
| CN201741765U (en) | Battery cell of power-type lithium ion battery | |
| CN220821863U (en) | Double-winding core type high-multiplying-power polymer lithium battery | |
| CN111682219A (en) | Anode plate, lithium ion battery and preparation method of lithium ion battery | |
| CN218160514U (en) | Lithium ion secondary battery and electronic product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |