CN205058729U - Can detect battery leakage's plastic -aluminum membrane - Google Patents
Can detect battery leakage's plastic -aluminum membrane Download PDFInfo
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- CN205058729U CN205058729U CN201520775770.3U CN201520775770U CN205058729U CN 205058729 U CN205058729 U CN 205058729U CN 201520775770 U CN201520775770 U CN 201520775770U CN 205058729 U CN205058729 U CN 205058729U
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Abstract
The utility model discloses a can detect battery leakage's plastic -aluminum membrane, the purpose is solved current lithium cell plastic -aluminum membrane weeping to detect the slow problem of speed. The utility model provides a can detect battery leakage's plastic -aluminum membrane, from interior to exterior are PP layer, binder layer A, aluminium foil layer, binder layer B, acid -base indicator layer, binder layer C, nylon layer in proper order. The utility model discloses still provide the another kind of structure that can detect weeping plastic -aluminum membrane, from interior to exterior is PP layer, binder layer A, aluminium foil layer, binder layer B, nylon layer, binder layer C, acid -base indicator layer, binder layer D, PET layer in proper order. The utility model discloses an increase the acid -base indicator layer in plastic -aluminum rete column structure, when taking place the weeping, electrolyte is through soaking the acid -base indicator to colour variable takes place, can judge through the naked eye whether the plastic -aluminum membrane has the damage, it is simply convenient, need not extra operation.
Description
Technical field
The utility model relates to lithium battery production field, particularly relates to a kind of aluminum plastic film that can detect battery leakage.
Background technology
Soft package lithium battery has the advantages such as thickness is thin, lightweight, security is good, is widely used in the fields such as various mobile device, electric automobile, electric tool.Lithium ion battery generally uses aluminum plastic film as shell, and aluminum plastic film is composited by three layers, the CPP layer of outermost nylon layer, middle aluminium foil layer, inner side usually, and their gross thickness is at 80 ~ 150 μm.The outermost nylon of aluminum plastic film has good anti-wear, breakage-proof function, and middle aluminium foil layer works the function intercepting air, moisture, and the CPP layer of inner side then plays isolated electrolytic corrosion, merges the effect of sealing.
Aluminum plastic film in punching course may owing to rushing, the shell degree of depth is excessively dark, Design of Dies improper to cause in aluminum plastic film layer polypropylene or outer nylon damaged, this breakage cannot to detect by an unaided eye resolution rushing the shell stage, if use this aluminum plastic film as shell packaged battery, after battery completes, the leakage of housing burn into can be caused, thus produce potential safety hazard.For eliminating this potential safety hazard, need to detect stamping forming plastic-aluminum shell.Detection method many employings copper sulphate is tested, and this experiment is equivalent to an electrolytic cell, is contacted by external power supply positive pole with plastic-aluminum shell aluminium lamination, external power supply negative pole and the aluminum plastic film that will detect are connected by copper-bath, if aluminum plastic film has breakage, then electrolytic cell conducting, has copper to separate out at breakage.
Chinese patent publication No. CN104390957A, disclose a kind of detection method of aluminum plastic film, this aluminum plastic film comprises the insulating plastic layer of aluminium lamination and encapsulating aluminium lamination, and the cavity had for accommodating battery core, comprise the following steps: get an aluminum plastic film to be measured, in the cavity of aluminum plastic film to be measured, inject copper-bath; Settle anode ear and negative electrode lug to aluminum plastic film to be measured, make positive and negative lug and copper-bath conducting, then will the plastic foil cavity encapsulation of copper-bath be marked with, positive and negative lug is fixed and protrudes from outside aluminum plastic film; Positive and negative lug is connected respectively a positive source and negative pole, after the energising scheduled time, open aluminum plastic film to be measured and detect whether have RED sector, if any then judging that there is breakage at this position of aluminum plastic film.The method is equipped with lug on aluminum plastic film, lug and copper-bath conducting, and be connected on power supply, whether energising detects aluminum plastic film has RED sector, can judge that whether aluminum plastic film is qualified, easy and simple to handle, detect accurately, but it is slow that the method exists detection speed, detect the shortcomings such as rear sample cannot use.
Utility model content
The purpose of this utility model, mainly for the problem that existing lithium battery aluminum-plastic film leakage detection speed is slow, provides a kind of aluminum plastic film that can identify lithium battery leakage fast.
Concrete technical scheme of the present utility model is: a kind of aluminum plastic film that can detect battery leakage, it is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, acid-base indicator layer, adhesive layer C, nylon layer from the inside to the outside.
Another kind of technical scheme of the present utility model is: a kind of aluminum plastic film that can detect battery leakage, it is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, nylon layer, adhesive layer C, acid-base indicator layer, adhesive layer D, pet layer from the inside to the outside.
The electrolyte of lithium battery is generally acidity or alkalescence, and when leakage occurs for it, electrolyte can infiltrate acid-base indicator by damaged aluminum plastic film, and therefore acid-base indicator shows different sour looks or alkaline color, can judge battery whether leakage thus.Outer field pet layer or nylon layer, then can prevent the material such as oxygen, steam, carbon dioxide in air to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.
As preferably, described acid-base indicator layer is mixed by acid-base indicator, binding agent and inserts.Mixed with filler by acid-base indicator, can ensure using under less acid-base indicator condition, the area of acid-base indicator layer is larger.Acid-base indicator layer thickness is 0.1 ~ 50 μm, and acid-base indicator layer thickness is too thick, if aluminum plastic film breakage is very little, leakage infiltration can be very slow, and may cause can not Timeliness coverage leakage, affects testing result.In actual use, according to the change of the electrolyte ph of seepage, suitable acid-base indicator can be selected.
As preferably, described inserts is selected from the one in non-woven fabrics, PE, EVA, PP, EPE.
The beneficial effects of the utility model are: by increasing acid-base indicator layer in aluminum plastic film layer structure, and when there is leakage, electrolyte is by infiltrating acid-base indicator, thus there is color change, can judge whether aluminum plastic film has breakage by naked eyes, simple and convenient, without the need to operation bidirectional.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the utility model aluminum plastic film;
Fig. 2 is the another kind of structural representation of the utility model aluminum plastic film.
In figure: 1-1-adhesive layer A, 1-2-adhesive layer B, 1-3-adhesive layer C, 1-4-adhesive layer D, 2-PP layer, 3-aluminium foil layer, 4-acid-base indicator layer, 5-nylon layer, 6-PET layer.
Detailed description of the invention
Below in conjunction with accompanying drawing also by specific embodiment, the technical solution of the utility model is described further.
Embodiment 1
As shown in Figure 1, a kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, acid-base indicator layer 4, adhesive layer C1-3, nylon layer 5 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3 adopt is polyvinylidene fluoride binding agent.
Acid-base indicator layer 4 is mixed by methyl red indicator, polyvinylidene fluoride binding agent and non-woven fabrics, and its thickness is 0.1 μm.Outer field nylon layer 5, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.
Embodiment 2
A kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, acid-base indicator layer 4, adhesive layer C1-3, nylon layer 5 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3 adopt is polyurethane adhesive.
Acid-base indicator layer 4 is mixed by methyl orange indicator, polyvinylidene fluoride binding agent and PE, and its thickness is 50 μm.Outer field nylon layer 5, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.
Embodiment 3
As shown in Figure 2, a kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, nylon layer 5, adhesive layer C1-3, acid-base indicator layer 4, adhesive layer D1-4, pet layer 6 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3, adhesive layer D1-4 adopt is acrylic resin binder.
Acid-base indicator layer 4 is mixed by reindeer moss indicator, acrylic resin binder and EVA, and its thickness is 0.1 μm.Outer field pet layer 6, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.
Embodiment 4
A kind of aluminum plastic film that can detect battery leakage, be followed successively by PP layer 2, adhesive layer A1-1, aluminium foil layer 3, adhesive layer B1-2, nylon layer 5, adhesive layer C1-3, acid-base indicator layer 4, adhesive layer D1-4, pet layer 6 from the inside to the outside, the binding agent that wherein adhesive layer A1-1, adhesive layer B1-2, adhesive layer C1-3, adhesive layer D1-4 adopt is acrylic resin binder.
Acid-base indicator layer 4 is mixed by phenolphthalein indicator, epoxy adhesive and EPE, and its thickness is 50 μm.Outer field pet layer 6, can prevent the materials such as the oxygen in air, steam, carbon dioxide to the destruction of acid-base indicator, and the colour developing that when also can prevent fluid injection, electrolyte contamination causes to outside batteries is simultaneously judged by accident.When there is leakage, electrolyte can infiltrate the acid-base indicator in acid-base indicator layer 4 by damaged aluminum plastic film, thus variable color occurs, and can judge battery whether leakage thus.
Claims (4)
1. can detect an aluminum plastic film for battery leakage, it is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, acid-base indicator layer, adhesive layer C, nylon layer from the inside to the outside.
2. can detect an aluminum plastic film for battery leakage, it is characterized in that, described aluminum plastic film is followed successively by PP layer, adhesive layer A, aluminium foil layer, adhesive layer B, nylon layer, adhesive layer C, acid-base indicator layer, adhesive layer D, pet layer from the inside to the outside.
3. a kind of aluminum plastic film that can detect battery leakage according to claim 1 and 2, it is characterized in that, described acid-base indicator layer is mixed by acid-base indicator, binding agent and inserts.
4. a kind of aluminum plastic film that can detect battery leakage according to claim 3, it is characterized in that, described inserts is selected from the one in non-woven fabrics, PE, EVA, PP, EPE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775770.3U CN205058729U (en) | 2015-10-08 | 2015-10-08 | Can detect battery leakage's plastic -aluminum membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775770.3U CN205058729U (en) | 2015-10-08 | 2015-10-08 | Can detect battery leakage's plastic -aluminum membrane |
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| Publication Number | Publication Date |
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| CN205058729U true CN205058729U (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520775770.3U Expired - Fee Related CN205058729U (en) | 2015-10-08 | 2015-10-08 | Can detect battery leakage's plastic -aluminum membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304834A (en) * | 2015-10-08 | 2016-02-03 | 浙江超威创元实业有限公司 | Aluminum plastic film capable of detecting battery leakage |
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- 2015-10-08 CN CN201520775770.3U patent/CN205058729U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304834A (en) * | 2015-10-08 | 2016-02-03 | 浙江超威创元实业有限公司 | Aluminum plastic film capable of detecting battery leakage |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20201008 |
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| CF01 | Termination of patent right due to non-payment of annual fee |