CN206628502U - A kind of secondary cell and its plastic-aluminum membrane structure - Google Patents
A kind of secondary cell and its plastic-aluminum membrane structure Download PDFInfo
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- CN206628502U CN206628502U CN201621440179.3U CN201621440179U CN206628502U CN 206628502 U CN206628502 U CN 206628502U CN 201621440179 U CN201621440179 U CN 201621440179U CN 206628502 U CN206628502 U CN 206628502U
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- pit
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- membrane structure
- elliptic arc
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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 application is related to secondary cell field, specifically, is related to a kind of secondary cell, its plastic-aluminum membrane structure and cavity plate.The secondary cell plastic-aluminum membrane structure of the application, it is included in the pit formed on aluminum plastic film by punch forming, the chamfering of pit mouth rim is elliptic arc.Using the application secondary cell plastic-aluminum membrane structure packaging film after punch forming aluminium lamination be unlikely to excessively thin, it is smaller compared to fillet pit trailing space gap when pit mouth rim is oval chamfering, space utilization can be optimized, packaging bag afterbody in hot pressing evacuation process and transportation is avoided to collapse simultaneously, bad order and angle position breakage ratio are substantially reduced, improves yield rate.
Description
Technical field
The application is related to secondary cell field, specifically, is related to a kind of secondary cell, and its plastic-aluminum membrane structure and cavity plate.
Background technology
Lithium ion battery is widely used in mobile electricity because having the characteristics that energy density height, voltage height, small volume, environmental protection
In sub- product, and the emphasis that the security of lithium ion battery is always people to be paid close attention to the most in use, it is this lithium battery
Packaging bag must strictly meet waterproof anti-corrosion, insulation of battery core etc. requirement.Existing soft bag lithium ionic cell uses aluminium more
Plastic film is packed, and makes packaging material stretcher strain by advance die stamp, is obtained corresponding punching hole structure, is then carried out naked battery core
Encapsulation.Aluminum plastic film is after punch forming, thinning also the tightest because stress suffered by the position of angle is maximum if stamping Die Design is improper
Heavy, aluminium lamination stretched conference and causes the breakage of angle position at the position of angle, battery security risk is present.In pit oral area in prior art
The equal rounding in edge, as shown in figure 1, radius of corner is bigger, plastic-aluminum film stretching stress is smaller in die process, can effectively reduce
Packaging film is damaged.But it is existing to rush hole technology to still have pit trailing space gap larger, battery core design presence is not utilized
Dead space, be unfavorable for the design of high-energy-density, and easily cause in follow-up hot pressing and evacuation process link and collapsed at the position of angle
Fall into, influence battery core packaging external appearance, more seriously, packaging bag drift angle will be caused to be punctured by inner pole piece corner, leak battery
Liquid, trigger the safety problems such as cells burst blast.
In consideration of it, special propose the application.
Utility model content
The primary goal of the invention of the application is to propose a kind of plastic-aluminum membrane structure.
The second goal of the invention of the application is to propose the secondary cell for being provided with the plastic-aluminum membrane structure.
The 3rd goal of the invention of the application is to propose to be used for the cavity plate for preparing the plastic-aluminum membrane structure.
In order to complete the purpose of the application, the technical scheme used for：
The application is related to a kind of plastic-aluminum membrane structure, is included in the pit formed on aluminum plastic film by punch forming, its feature
It is, the chamfering of the pit mouth rim is elliptic arc.
Preferably, one end that the elliptic arc is located at the pit side wall is side, the point of contact of the side near coal-mine water
Square to distance be L1, pit depth h, 0<L1<h.
Preferably, one end that the elliptic arc is located at the pit oral area is mouth end, and the point of contact at the mouth end is hung down near coal-mine
Nogata to distance be L2, pit depth h, 0<L2<h.
Preferably, the long axis direction of the elliptic arc and the angle of the pit side wall are 0~90 degree.
Preferably, the long axis direction of the elliptic arc and the angle of the pit side wall are 45~90 degree.
Preferably, when the angle of the long axis direction of the elliptic arc and the pit side wall is less than 45 degree, L1 is 0.1~
0.3h。
Preferably, when the angle of the long axis direction of the elliptic arc and the pit side wall is more than 45 degree, L2 is 0.1~
0.3h。
Preferably, the depth of the pit is 2~8mm.
The application further relates to a kind of soft-packaging secondary battery, including naked battery core and aluminum plastic film, and the laminated aluminum film is described
Outside naked battery core, the structure setting of the aluminum plastic film is above-mentioned plastic-aluminum membrane structure.
The application further relates to a kind of aluminum plastic film cavity plate, including for carrying out stamping forming groove to aluminum plastic film, it is described recessed
The chamfering at notch edge is elliptic arc.
The technical scheme of the application at least has following beneficial effect：
Using the application secondary cell plastic-aluminum membrane structure packaging film after punch forming aluminium lamination be unlikely to excessively thin, pit
It is smaller compared to fillet pit trailing space gap when mouth rim is oval chamfering, space availability ratio is optimized, avoids heat
Packaging bag afterbody collapses in pressure evacuation process and transportation, substantially reduces bad order and angle position breakage ratio, improves into
Product rate.
Brief description of the drawings
Fig. 1 is the aluminum plastic film structural representation in prior art；
Fig. 2 is the aluminum plastic film structural representation in the embodiment of the present application；
Fig. 3 is elliptic arc schematic diagram in the embodiment of the present application 1；
Fig. 4 is elliptic arc schematic diagram in the embodiment of the present application 2；
Fig. 5 is elliptic arc schematic diagram in the embodiment of the present application 3；
Fig. 6 is the embodiment of the present application aluminum plastic film cavity plate schematic diagram；
Wherein：
1- plastic-aluminum membrane structures；
10- elliptic arcs；
101- sides；
102- mouths end；
2- aluminum plastic film cavity plates.
Embodiment
With reference to specific embodiment, the application is expanded on further.It should be understood that these embodiments are merely to illustrate the application
Rather than limitation scope of the present application.
The invention relates to a kind of secondary cell plastic-aluminum membrane structure 1, as shown in Figure 2；It is included on aluminum plastic film and passes through
The pit that punch forming is formed, the chamfering of pit mouth rim are elliptic arc 10, and the elliptic arc 10 in the application refers on ellipse
Any one section of arc.Lithium battery pack pack pit afterbody gap mistake after punch forming when using arc transition so as to solve
Greatly, space availability ratio deficiency, and packaging bag afterbody collapses during follow-up hot pressing, evacuation process and use, causes outward appearance
Easily contacted too closely with internal naked battery core while bad, pole piece corner is punctured aluminum plastic film, the problem of causing Safe Failure.
In the embodiment of the present application, one end that elliptic arc is located at pit side wall is side 101, and elliptic arc is located at pit oral area
One end be mouth end 102, the point of contact of side 101 to the distance of near coal-mine horizontal direction is L1, and the point of contact at mouth end 102 is near coal-mine vertical
The distance in direction is L2, pit depth h, 0<L1<H, 0<L2<h.
In the embodiment of the present application, the length of the major axis radius of elliptic arc is more than minor axis radius, the major axis of elliptic arc 10 with it is recessed
The angle for cheating side wall is 0~90 degree, and preferably 45~90 degree.Within the range, the suitable elliptic arc 10 of radian can be formed, from
And take into account the mechanics effect after punch forming and less pit trailing space gap can be kept, improve the same of space availability ratio
When avoid gap excessive caused by afterbody collapse.
In the embodiment of the present application, when the long axis direction of elliptic arc is less than 45 degree with the angle of pit side wall, L1=0.1~
0.3h, when the long axis direction of elliptic arc is more than 45 degree with the angle of pit side wall, L2=0.1~0.3h.
In the embodiment of the present application, pit depth h is generally 2~8mm.Pit depth within the range can be used for a variety of types
Number secondary battery of soft package.
In the embodiment of the present application, the chamfering at pit bottom edge is fillet, can be configured as the ellipse of the embodiment of the present application
Arc 10.
The application further relates to a kind of soft-packaging secondary battery, including naked battery core and aluminum plastic film, and laminated aluminum film is outside naked battery core
Face, the structure setting of aluminum plastic film is the secondary cell plastic-aluminum membrane structure described in any of the above-described section.
The application further relates to a kind of aluminum plastic film cavity plate 2, including for carrying out stamping forming groove, groove port to aluminum plastic film
The chamfering at portion edge is elliptic arc, and the wherein design of elliptic arc is identical with the elliptic arc 10 in plastic-aluminum membrane structure, specifically such as Fig. 6 institutes
Show.Depth of groove h, pit mouth tail edge fall elliptic arc 10, the side 101 of elliptic arc 10 and mouth end 102 near coal-mine distance from 0 to
H changes, and major axis and the molding surface angle of elliptic arc are 0~90 degree.Depth of groove h is 2~8mm.Using the cavity die structure pair
Aluminum plastic film carries out punch forming, forms pit by punch forming on aluminum plastic film, the chamfering of pit mouth rim is elliptic arc
10, reduce the packaging bag trailing space after packaging electric core, improve space availability ratio, effectively prevent in follow-up hot pressing and vacuumize
Packaging bag afterbody collapses in process, ensures that battery core outward appearance is good.
So that model 576875, capacity is 3020mAh secondary battery of soft package as an example, scour hole depth h is 5mm.Specifically
Experimental method is：
Plastic-aluminum membrane structure is stamped and formed out using point of contact distance L1, L2 shown in table 1 and angle initialization, plastic-aluminum is prepared
Film, the aluminum plastic film and the secondary battery core to match are assembled to obtain soft-packaging secondary battery；Aluminum plastic film texture grooves mouth in comparative example
The equal rounding in portion edge, is equally prepared comparative example soft-packaging secondary battery.
Specifically, the elliptic arc in embodiment 1 is as shown in figure 3, the long axis direction and the angle of pit side wall of elliptic arc are
90 degree, L1=0.1h, L2=0.3h.
Elliptic arc in embodiment 2 is as shown in figure 4, the long axis direction of elliptic arc and the angle of pit side wall are 45 degree, L2
=L1=0.3h.
Elliptic arc in embodiment 3 as shown in figure 5, the long axis direction of elliptic arc and the angle of pit side wall are 0 degree, this
When, L1=0.3h, L2=0.1h.
Each group soft-package battery is prepared 100 respectively, then observation is compared aluminum plastic film through top side seal, cold-hot pressure and vacuumized
Ratio and angle position breakage ratio are collapsed etc. afterbody after process.
Table 1：
From result, designed before improving using rounding, aluminum plastic film afterbody collapses ratio and is up to 8.3%, and has certain
Angle position breakage risk；Afterbody is improved by embodiment 1 and falls oval angle, and L1, L2 value is 0.1h and 0.3h, and angle is 90 degree and set
Under meter, afterbody collapses ratio and substantially reduced, and the breakage of angle position also has certain improvement, embodiment 3 further adjust oval angle point of contact away from
From and angle after, trailing space gap is smaller, and afterbody is collapsed and breakage ratio in angle position is further reduced.As can be seen here, the application
In groove mouth edge fall the structure at oval angle effectively to reduce packaging film bad order and angle position damaged.
It is not for limiting claim, any this area skill although the application is disclosed as above with preferred embodiment
Art personnel can make some possible variations and modification on the premise of the application design is not departed from, therefore the application
Protection domain should be defined by the scope that the application claim is defined.
Claims (10)
1. a kind of plastic-aluminum membrane structure, it is included in the pit formed on aluminum plastic film by punch forming, it is characterised in that the pit
The chamfering of mouth rim is elliptic arc.
2. plastic-aluminum membrane structure according to claim 1, it is characterised in that the elliptic arc is located at the one of the pit side wall
To hold as side, the point of contact of the side to the distance of near coal-mine horizontal direction is L1, pit depth h, 0<L1<h.
3. plastic-aluminum membrane structure according to claim 1, it is characterised in that the elliptic arc is located at the one of the pit oral area
To hold as mouth end, the point of contact at the mouth end to the distance of near coal-mine vertical direction is L2, pit depth h, 0<L2<h.
4. plastic-aluminum membrane structure according to claim 1, it is characterised in that the long axis direction of the elliptic arc and the pit
The angle of side wall is 0~90 degree.
5. plastic-aluminum membrane structure according to claim 1, it is characterised in that the long axis direction of the elliptic arc and the pit
The angle of side wall is 45~90 degree.
6. plastic-aluminum membrane structure according to claim 1, it is characterised in that the depth of the pit is 2~8mm.
7. plastic-aluminum membrane structure according to claim 1, it is characterised in that the long axis direction of the elliptic arc and the pit
When the angle of side wall is less than 45 degree, L1=0.1~0.3h.
8. plastic-aluminum membrane structure according to claim 1, it is characterised in that the long axis direction of the elliptic arc and the pit
When the angle of side wall is more than 45 degree, L2=0.1~0.3h.
9. a kind of soft-packaging secondary battery, including naked battery core and aluminum plastic film, for the laminated aluminum film outside the naked battery core, it is special
Sign is that the structure setting of the aluminum plastic film is such as plastic-aluminum membrane structure according to any one of claims 1 to 8.
10. a kind of aluminum plastic film cavity plate, including for carrying out stamping forming groove to aluminum plastic film, it is characterised in that the groove
The chamfering of mouth rim is elliptic arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621440179.3U CN206628502U (en) | 2016-12-27 | 2016-12-27 | A kind of secondary cell and its plastic-aluminum membrane structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621440179.3U CN206628502U (en) | 2016-12-27 | 2016-12-27 | A kind of secondary cell and its plastic-aluminum membrane structure |
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| Publication Number | Publication Date |
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| CN206628502U true CN206628502U (en) | 2017-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621440179.3U Active CN206628502U (en) | 2016-12-27 | 2016-12-27 | A kind of secondary cell and its plastic-aluminum membrane structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103508A (en) * | 2018-09-03 | 2018-12-28 | 桑顿新能源科技有限公司 | A method of improving soft package lithium battery angle position fold |
| CN110739487A (en) * | 2019-11-28 | 2020-01-31 | 东莞维科电池有限公司 | micro-button battery and preparation method thereof |
| CN112599895A (en) * | 2020-12-15 | 2021-04-02 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery |
| WO2023169388A1 (en) * | 2022-03-07 | 2023-09-14 | 比亚迪股份有限公司 | Aluminum laminated film for battery, battery, and vehicle |
-
2016
- 2016-12-27 CN CN201621440179.3U patent/CN206628502U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103508A (en) * | 2018-09-03 | 2018-12-28 | 桑顿新能源科技有限公司 | A method of improving soft package lithium battery angle position fold |
| CN110739487A (en) * | 2019-11-28 | 2020-01-31 | 东莞维科电池有限公司 | micro-button battery and preparation method thereof |
| CN112599895A (en) * | 2020-12-15 | 2021-04-02 | 珠海冠宇电池股份有限公司 | Soft package lithium ion battery |
| WO2023169388A1 (en) * | 2022-03-07 | 2023-09-14 | 比亚迪股份有限公司 | Aluminum laminated film for battery, battery, and vehicle |
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