CN202503037U - Flexible package polymer lithium cell and aluminum plastic film pit structure thereof - Google Patents
Flexible package polymer lithium cell and aluminum plastic film pit structure thereof Download PDFInfo
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- CN202503037U CN202503037U CN2012200453120U CN201220045312U CN202503037U CN 202503037 U CN202503037 U CN 202503037U CN 2012200453120 U CN2012200453120 U CN 2012200453120U CN 201220045312 U CN201220045312 U CN 201220045312U CN 202503037 U CN202503037 U CN 202503037U
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- plastic film
- aluminum plastic
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- rounding
- lithium battery
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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
Abstract
The utility model discloses a flexible package polymer lithium cell and an aluminum plastic film pit structure thereof. The aluminum plastic film pit structure comprises a pit formed by die stamping and stretching on an aluminum plastic film, wherein the values of the pit bottom edge rounding R1 and the pit mouth edge rounding R2 exceed 1.0mm. Because high-value rounding is adopted on the bottom edges and the mouth edge of the pit on the aluminum plastic film, angular damage caused by stamping and stretching the aluminum plastic film is effectively reduced, so that the battery manufacturing yield is improved, particularly the manufacturing yield of large and thick batteries is improved, and the production cost is reduced; and meanwhile, the safe accidents such as corrosion, liquid leakage even burn caused in the battery manufacturing process and at the client are effectively avoided, and safety use of the battery is ensured.
Description
Technical field
The utility model relates to the polymer Li-ion battery field of flexible package, and in particular, what improvement related to is that a kind of big capacity, thick size of being applicable to can prevent that also Soft Roll poly-lithium battery damaged towards position, angle, hole and aluminum plastic film thereof are towards cheating structure.
Background technology
Lithium ion battery because of have the energy density height, characteristics such as volume is little, voltage is high, environmental protection, so be widely used in inventions such as portable mobile electron finished product and portable portable power source; The polymer Li-ion battery of flexible package then has more advantages such as high-energy-density, miniaturization, slimming, lightweight, high safety, long circulation life, is described as follow-on lithium ion battery.
Existing flexible package polymer Li-ion battery adopts the aluminum plastic film packing; Aluminum plastic film stretches through punch die earlier and realizes dashing the hole structure; And then naked electric core packed; Again through top side envelope encapsulation, change into (refer to utilize chemistry and electrochemical reaction that electrode is changed into and have the process of the positive and negative electrode of electro-chemical activity), vacuum suction encapsulation, capacity check, final molding and get the flexible package polymer Li-ion battery.
Existing aluminum plastic film is mainly formed by three layers, respectively is nylon layer, metal aluminium lamination and polypropylene PP layer from outside to inside, and the gross thickness of aluminum current plastic film is about 115 microns; Wherein the metal aluminium lamination is 40 microns; Based on traditional design and manufacturing process, aluminum plastic film dashes the rounding R1 of hole bottom margin and the rounding R2 near coal-mine edge of plastic-aluminum stamping often is no more than 1.0mm, under the most situation; R1=1.0mm, R2=0.6mm.
But the reason that increases because of capacity causes the size of flexible package polymer Li-ion battery bigger, when particularly gauge is thicker; For example, single degree of depth of cheating is cheated cumulative depth when 6.0mm is above perhaps two more than the 4.5mm, and the design of existing R1 and R2 is cheated appearance damaged phenomenon in place, position, angle in punching press and following process link with regard to causing aluminum plastic film to dash easily; And then cause battery leakage; Even cause safety problem such as battery burning, and reduced the harvest rate of manufacturing simultaneously, also increased cost of labor.
Therefore, prior art still haves much room for improvement and develops.
The utility model content
The purpose of the utility model is, provides a kind of Soft Roll poly-lithium battery and aluminum plastic film thereof to dash the hole structure, can reduce aluminum plastic film and damaged phenomenon occur towards place, position, angle, hole, and the raising battery is made the harvest rate, reduces production costs.
The technical scheme of the utility model is following: a kind of aluminum plastic film of Soft Roll poly-lithium battery dashes the hole structure; Be included in the pit that stretches and form through punch die on the aluminum plastic film, the value of said pit bottom edge rounding R1` and said pit oral area edge rounding R2` is all above 1.0mm.
The aluminum plastic film of described Soft Roll poly-lithium battery dashes the hole structure, and wherein: the span of the rounding R1` at said pit bottom edge is arranged between 1.2 ~ 1.8mm.
The aluminum plastic film of described Soft Roll poly-lithium battery dashes the hole structure, and wherein: the span of the rounding R2` at said pit oral area edge is arranged between 1.1 ~ 1.5mm.
The aluminum plastic film of described Soft Roll poly-lithium battery dashes the hole structure, and wherein: the rounding R1` at said pit bottom edge is greater than the rounding R2` at said pit oral area edge.
The aluminum plastic film of described Soft Roll poly-lithium battery dashes the hole structure, and wherein: said aluminum plastic film is made up of nylon layer, metal aluminium lamination and polypropylene layer from outside to inside successively.
The aluminum plastic film of described Soft Roll poly-lithium battery dashes the hole structure, and wherein: said pit comprises the airbag hole that is used to place the pole piece hole of pole piece and is used to hold gas.
The aluminum plastic film of described Soft Roll poly-lithium battery dashes the hole structure, and wherein: said pole piece hole comprises the single hole of the degree of depth more than 4.5mm.
The aluminum plastic film of described Soft Roll poly-lithium battery dashes the hole structure, and wherein: said pole piece hole comprises the two holes of cumulative depth more than 6.0mm.
A kind of Soft Roll poly-lithium battery comprises naked electric core and aluminum plastic film, and said aluminum plastic film is packaged in said naked electric core outside, and the aluminum plastic film that the structure of said aluminum plastic film is set to above-mentioned Soft Roll poly-lithium battery described in each dashes the hole structure.
A kind of Soft Roll poly-lithium battery that the utility model provided and aluminum plastic film thereof dash the hole structure; Because pit bottom edge on aluminum plastic film and oral area edge have adopted the rounding of big value; Reduced position, the angle breakage that aluminum plastic film stretches and causes through punch die effectively, and reduced position, angle breakage, made the harvest rate thereby improved battery through causing in follow-up some roads manufacturing procedure; Especially improve the making harvest rate of big and thick battery, reduced production cost; Simultaneously, avoid security incidents such as burn into leakage that battery causes even burning effectively in manufacturing process and in client, guaranteed the safe handling of battery.
Description of drawings
Fig. 1 is that the aluminum plastic film of the utility model Soft Roll poly-lithium battery dashes hole structural section sketch map (annotate: Dan Keng has identical structure with Shuan Keng, and only the degree of depth of pit is different).
Fig. 2 be the aluminum plastic film of the utility model Soft Roll poly-lithium battery towards the Dan Keng structural plan sketch map.
Fig. 3 be the aluminum plastic film of the utility model Soft Roll poly-lithium battery towards the Shuan Keng structural plan sketch map.
Embodiment
Below will combine accompanying drawing, the embodiment and the embodiment of the utility model specified, described specific embodiment in order to explain the utility model, is not the embodiment that is used to limit the utility model only.
For guaranteeing to pack effect, it is damaged or damaged through the position, angle of causing behind some procedures through the stretch position, angle of causing of punch die to reduce aluminum plastic film, in fact aluminum plastic film to dash the hole structural design most important; Through repeatedly test with discover, the rounding size that aluminum plastic film dashes place, structural angle position, hole has often determined the level of stretch of intermetallic metal aluminium lamination in the process of punch die, uniformity that promptly stretches and rational thickness; If it is improper that aluminum plastic film dashes the rounding design of place, structural angle position, hole; Cause place, position, angle aluminium lamination very thin easily with regard to causing the aluminium lamination stretching excessive at place, position, angle easily, that is to say, even break; Thereby further cause inside battery and exterior; Make and the reaction of extraneous moisture and inside battery organic electrolyte cause battery leakage, corrosion, even cause safety problem such as battery burning.
As shown in Figure 1; Fig. 1 is that the aluminum plastic film of the utility model Soft Roll poly-lithium battery dashes hole structural section sketch map; The aluminum plastic film of said Soft Roll poly-lithium battery dashes the hole structure and is included in the pit 103 (or 105) that stretches and form through punch die on the aluminum plastic film 100; Wherein, the value of the rounding R1` of said pit 103 (or 105) bottom margin and said pit 103 (or 105) oral area edge rounding R2` reduces aluminum plastic film 100 thus and dashes the phenomenon that breakage appears in place, position, angle, hole all above 1.0mm.
Because the gross thickness of aluminum plastic film 100 is 115 microns; Wherein the metal aluminium lamination is 40 microns; Be 0.040mm, therefore, in this article; The rounding R1` of said pit 103 (or 105) bottom margin both can think the rounding on said pit 103 (or 105) bottom interior wall, also can think the rounding on said pit 103 (or 105) bottom outer wall; Same, said pit 103 (or 105) oral area edge rounding R2` both can think the rounding on said pit 103 (or 105) mouth inner wall, also can think the rounding on said pit 103 (or 105) the oral area outer wall.
Aluminum plastic film based on above-mentioned Soft Roll poly-lithium battery dashes the hole structure; The utility model has also proposed a kind of Soft Roll poly-lithium battery; Comprise naked electric core and aluminum plastic film; Said aluminum plastic film is packaged in said naked electric core outside, and wherein: the aluminum plastic film that the structure of said aluminum plastic film can be set to above-mentioned Soft Roll poly-lithium battery dashes the hole structure.
Dash in the preferred implementation of hole structure at the utility model Soft Roll poly-lithium battery and aluminum plastic film thereof; Concrete; The span of the rounding R1` of said pit 103 (or 105) bottom margin preferably is arranged between 1.2 ~ 1.8mm, can prevent preferably that said pit 103 (or 105) bottom margin place position, angle breakage from can avoid energy content of battery density to diminish again.
If the rounding R1`＜1.2mm of said pit 103 (or 105) bottom margin, when said pit 103 (or 105) degree of depth >=4.5mm, the damaged phenomenon in position, angle just takes place in said pit 103 (or 105) bottom margin place easily; And, can make the energy density of battery diminish if the rounding R1`＞1.8mm of said pit 103 (or 105) bottom margin then is unfavorable for placing more pole piece.
Concrete, the span of the rounding R2` at said pit 103 (or 105) oral area edge preferably is arranged between 1.1 ~ 1.5mm, can prevent preferably that said pit 103 (or 105) oral area edge angle position breakage from can avoid energy content of battery density to diminish again.
If the rounding R2`＜1.1mm at said pit 103 (or 105) oral area edge, when said pit 103 (or 105) degree of depth >=4.5mm, the damaged phenomenon in position, angle just takes place in said pit 103 (or 105) oral area edge easily; And, can make the energy density of battery diminish if the rounding R1`＞1.5mm at said pit 103 (or 105) oral area edge then also is unfavorable for placing more pole piece.
Be preferably; In above-mentioned span; The rounding R1` of said pit 103 (or 105) bottom margin is greater than the rounding R2` at said pit 103 (or 105) oral area edge, such dash the hole structure and can play synergy, when guaranteeing to dash the hole and battery make the breakage that causes position, 100 jiaos of positions of aluminum plastic film in the follow-up operation not too easily; Both guarantee the sealing effectiveness of battery, also guaranteed the battery high energy density.
As shown in Figure 2; Fig. 2 be the aluminum plastic film of the utility model Soft Roll poly-lithium battery towards the Dan Keng structural plan sketch map; Said aluminum plastic film 100 comprises the last aluminum plastic film 110 and following aluminum plastic film 120 that one connects; A said side of aluminum plastic film 120 is down produced pit (103 or 105), comprises the pole piece hole 103 and the airbag hole 105 that is used to hold gas that are used to place pole piece, because battery can produce gas when changing into; So the gas that said airbag hole 105 can hold battery to produce when changing into avoids battery to swell; Said pit (103 or 105) also can be produced on a said side that goes up aluminum plastic film 110.
As shown in Figure 3; Fig. 3 be the aluminum plastic film of the utility model Soft Roll poly-lithium battery towards the Shuan Keng structural plan sketch map; Said aluminum plastic film 100 comprises the last aluminum plastic film 110 and following aluminum plastic film 120 that one connects; A side of aluminum plastic film 110 and a said side of aluminum plastic film 120 are down produced the pole piece hole 130 that is used to place pole piece respectively on said, produce the airbag hole 105 that is used to hold gas in a said side of aluminum plastic film down, and said airbag hole 105 also can be produced on a said side that goes up aluminum plastic film 110; Bipolar sheets is cheated under the situation that is used for manufacturing large-capacity batteries more and is adopted.
The single hole degree of depth >=4.5mm when punching out on said aluminum plastic film 100; During two holes cumulative depth >=6.0mm; Can reduce breakage of position, angle or position, angle breakage that aluminum plastic film 100 stretches and causes through punch die effectively through causing behind some procedures; Can improve the making harvest rate of big and thick battery like this, reduce production costs; Can avoid simultaneously safety problems such as burn into leakage that battery causes even burning effectively in manufacturing process and in client, guarantee that battery can use safely.
As shown in table 1 below; Portable power source battery so that the model of certain company exploitation is 903565, capacity is 2500mAh is an example, because battery is thicker, the stretching of said aluminum plastic film 100 can be adopted two holes structures of Fig. 2; Wherein, Dell value 4.8mm, shallow hole value 3.2mm, the instance through different roundings come the comparison aluminum plastic film damaged ratio to occur towards position, angle, place, hole.
Table 1:
.
Can be known that by table 1 aluminum plastic film before improvement is under the proportion design of the rounding R2`=0.6mm near coal-mine the edge of rounding R1`=1.0mm combination plastic-aluminum stamping of hole bottom margin, aluminum plastic film the damaged ratio in position, angle occurs up to 6.8%; But; Combine at R1`=1.5mm after the improvement under the proportion design of R2`=1.1mm; Aluminum plastic film the damaged ratio in position, angle occurs and just obviously reduces to 0.3%, and combines under the proportion design of R2`=1.3mm at R1`=1.6mm after the improvement, and aluminum plastic film the damaged ratio in position, angle occurs and reduces to 0.1% especially; It is thus clear that the aluminum plastic film that the utility model the is confirmed specific rounding angle value scope in the structure of hole of dashing can reduce big capacity, thick position, flexible package polymer Li-ion battery angle breakage effectively; Avoid battery leakage, corrosion greatly, even cause safety problem such as battery burning.
Dashing the hole structure with Soft Roll poly-lithium battery of the prior art and aluminum plastic film thereof compares; A kind of Soft Roll poly-lithium battery that the utility model provided and aluminum plastic film thereof dash the hole structure; Because pit bottom edge on aluminum plastic film and oral area edge have adopted the rounding of big value; Reduced position, the angle breakage that aluminum plastic film stretches and causes through punch die effectively, and reduced position, angle breakage, made the harvest rate thereby improved battery through causing in follow-up some roads manufacturing procedure; Especially improve the making harvest rate of big and thick battery, reduced production cost; Simultaneously, avoid security incidents such as burn into leakage that battery causes even burning effectively in manufacturing process and in client, guaranteed the safe handling of battery.
Should be understood that; The preferred embodiment that the above is merely the utility model is not sufficient to limit the technical scheme of the utility model, concerning those of ordinary skills; Within the spirit and principle of the utility model; Can increase and decrease according to above-mentioned explanation, replacement, conversion or improvement, and all these increases and decreases, replacement, conversion or improve after technical scheme, all should belong to the protection range of the utility model accompanying claims.
Claims (9)
1. the aluminum plastic film of a Soft Roll poly-lithium battery dashes the hole structure; Be included in the pit that stretches and form through punch die on the aluminum plastic film, it is characterized in that: the value of said pit bottom edge rounding R1` and said pit oral area edge rounding R2` is all above 1.0mm.
2. the aluminum plastic film of Soft Roll poly-lithium battery according to claim 1 dashes the hole structure, and it is characterized in that: the span of the rounding R1` at said pit bottom edge is arranged between 1.2 ~ 1.8mm.
3. the aluminum plastic film of Soft Roll poly-lithium battery according to claim 1 dashes the hole structure, and it is characterized in that: the span of the rounding R2` at said pit oral area edge is arranged between 1.1 ~ 1.5mm.
4. the aluminum plastic film of Soft Roll poly-lithium battery according to claim 1 dashes the hole structure, and it is characterized in that: the rounding R1` at said pit bottom edge is greater than the rounding R2` at said pit oral area edge.
5. the aluminum plastic film of Soft Roll poly-lithium battery according to claim 1 dashes the hole structure, and it is characterized in that: said aluminum plastic film is made up of nylon layer, metal aluminium lamination and polypropylene layer from outside to inside successively.
6. the aluminum plastic film of Soft Roll poly-lithium battery according to claim 1 dashes the hole structure, it is characterized in that: said pit comprises the airbag hole that is used to place the pole piece hole of pole piece and is used to hold gas.
7. the aluminum plastic film of Soft Roll poly-lithium battery according to claim 6 dashes the hole structure, it is characterized in that: said pole piece hole comprises the single hole of the degree of depth more than 4.5mm.
8. the aluminum plastic film of Soft Roll poly-lithium battery according to claim 6 dashes the hole structure, it is characterized in that: said pole piece hole comprises the two holes of cumulative depth more than 6.0mm.
9. Soft Roll poly-lithium battery; Comprise naked electric core and aluminum plastic film; Said aluminum plastic film is packaged in said naked electric core outside, it is characterized in that: the structure of said aluminum plastic film is set to dash the hole structure like the aluminum plastic film of each described Soft Roll poly-lithium battery in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200453120U CN202503037U (en) | 2012-02-13 | 2012-02-13 | Flexible package polymer lithium cell and aluminum plastic film pit structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200453120U CN202503037U (en) | 2012-02-13 | 2012-02-13 | Flexible package polymer lithium cell and aluminum plastic film pit structure thereof |
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| CN202503037U true CN202503037U (en) | 2012-10-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654144A (en) * | 2016-12-23 | 2017-05-10 | 天津力神电池股份有限公司 | Specially-shaped airbag of polymer lithium ion battery and manufacturing process of specially-shaped air bag |
| 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 |
| CN110137521A (en) * | 2019-05-22 | 2019-08-16 | 湖南科霸汽车动力电池有限责任公司 | The measuring method of soft-package battery aluminum plastic film punching press limit depth |
| CN112098238A (en) * | 2019-06-18 | 2020-12-18 | 万向一二三股份公司 | Method for measuring ductility of pit punching aluminum-plastic film for power lithium ion battery |
| CN113363555A (en) * | 2021-04-30 | 2021-09-07 | 万向一二三股份公司 | Lithium ion battery for improving leakage failure of soft package battery and packaging process thereof |
-
2012
- 2012-02-13 CN CN2012200453120U patent/CN202503037U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654144A (en) * | 2016-12-23 | 2017-05-10 | 天津力神电池股份有限公司 | Specially-shaped airbag of polymer lithium ion battery and manufacturing process of specially-shaped air bag |
| CN106654144B (en) * | 2016-12-23 | 2019-07-30 | 天津力神电池股份有限公司 | The special-shaped airbag and its manufacture craft of polymer Li-ion battery |
| 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 |
| CN110137521A (en) * | 2019-05-22 | 2019-08-16 | 湖南科霸汽车动力电池有限责任公司 | The measuring method of soft-package battery aluminum plastic film punching press limit depth |
| CN112098238A (en) * | 2019-06-18 | 2020-12-18 | 万向一二三股份公司 | Method for measuring ductility of pit punching aluminum-plastic film for power lithium ion battery |
| CN112098238B (en) * | 2019-06-18 | 2024-03-05 | 万向一二三股份公司 | Pit punching aluminum plastic film ductility measuring method for power lithium ion battery |
| CN113363555A (en) * | 2021-04-30 | 2021-09-07 | 万向一二三股份公司 | Lithium ion battery for improving leakage failure of soft package battery and packaging process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20121024 Termination date: 20190213 |